Merge pull request #41829 from BerriAI/litellm_rust_crate_layering

refactor(rust): align crates with Python package layering

litellm-rust/Cargo.lock

@@ -2025,19 +2025,15 @@ dependencies = [
 name = "litellm-core"
 version = "0.1.0"
 dependencies = [
- "aws-smithy-eventstream",
- "aws-smithy-types",
  "base64 0.22.1",
  "bytes",
- "data-url",
  "futures-util",
  "litellm-auth",
  "litellm-auth-aws",
- "litellm-auth-azure",
- "litellm-auth-gcp",
  "litellm-callbacks",
- "litellm-framing",
- "litellm-providers",
+ "litellm-core-utils",
+ "litellm-llms",
+ "litellm-types",
  "mime_guess",
  "moka",
  "rand 0.8.7",
@@ -2048,8 +2044,6 @@ dependencies = [
  "rustls-native-certs",
  "serde",
  "serde_json",
- "serde_path_to_error",
- "serde_with",
  "sha2 0.10.9",
  "strum",
  "subtle",
@@ -2061,6 +2055,19 @@ dependencies = [
  "veil",
 ]
 
+[[package]]
+name = "litellm-core-utils"
+version = "0.1.0"
+dependencies = [
+ "litellm-types",
+ "serde",
+ "serde_json",
+ "serde_path_to_error",
+ "serde_with",
+ "thiserror 2.0.19",
+ "url",
+]
+
 [[package]]
 name = "litellm-framing"
 version = "0.1.0"
@@ -2091,15 +2098,33 @@ dependencies = [
 ]
 
 [[package]]
-name = "litellm-providers"
+name = "litellm-llms"
 version = "0.1.0"
 dependencies = [
+ "aws-smithy-eventstream",
+ "aws-smithy-types",
+ "base64 0.22.1",
+ "bytes",
+ "data-url",
+ "futures-util",
  "litellm-auth",
  "litellm-auth-aws",
+ "litellm-auth-azure",
+ "litellm-auth-gcp",
+ "litellm-callbacks",
+ "litellm-core-utils",
+ "litellm-framing",
+ "litellm-types",
+ "reqwest 0.12.28",
  "rstest",
  "serde",
  "serde_json",
+ "serde_path_to_error",
+ "serde_with",
  "thiserror 2.0.19",
+ "time",
+ "tokio",
+ "url",
 ]
 
 [[package]]
@@ -2113,7 +2138,9 @@ dependencies = [
  "litellm-callbacks-legacy",
  "litellm-core",
  "litellm-host-python",
+ "litellm-llms",
  "litellm-token-counter",
+ "litellm-types",
  "pyo3",
  "pyo3-async-runtimes",
  "rstest",
@@ -2140,6 +2167,14 @@ dependencies = [
  "unicode-normalization-alignments",
 ]
 
+[[package]]
+name = "litellm-types"
+version = "0.1.0"
+dependencies = [
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "litemap"
 version = "0.8.2"

litellm-rust/Cargo.toml

@@ -17,7 +17,9 @@ litellm-auth = { path = "crates/auth" }
 litellm-auth-aws = { path = "crates/auth-aws" }
 litellm-auth-azure = { path = "crates/auth-azure" }
 litellm-auth-gcp = { path = "crates/auth-gcp" }
-litellm-providers = { path = "crates/providers" }
+litellm-llms = { path = "crates/llms" }
+litellm-types = { path = "crates/types" }
+litellm-core-utils = { path = "crates/core-utils" }
 litellm-cache = { path = "crates/cache" }
 litellm-cache-memory = { path = "crates/cache-memory" }
 litellm-token-counter = { path = "crates/token-counter" }

litellm-rust/crates/core-utils/Cargo.toml

@@ -1,16 +1,15 @@
 [package]
-name = "litellm-providers"
+name = "litellm-core-utils"
 version = "0.1.0"
 edition.workspace = true
 license.workspace = true
 repository.workspace = true
 
 [dependencies]
-litellm-auth.workspace = true
-litellm-auth-aws.workspace = true
+litellm-types.workspace = true
 serde.workspace = true
 serde_json.workspace = true
+serde_path_to_error = "0.1"
+serde_with.workspace = true
 thiserror.workspace = true
-
-[dev-dependencies]
-rstest.workspace = true
+url.workspace = true

litellm-rust/crates/core-utils/src/call_arguments.rs

@@ -8,7 +8,7 @@ use serde_json::{Map, Value};
 pub struct CallArguments(Map<String, Value>);
 
 impl CallArguments {
-    pub(crate) fn select(&self, names: &[&str]) -> Map<String, Value> {
+    pub fn select(&self, names: &[&str]) -> Map<String, Value> {
         self.iter()
             .filter(|(name, _)| names.contains(&name.as_str()))
             .map(|(name, value)| (name.clone(), value.clone()))

litellm-rust/crates/core-utils/src/core_helpers.rs

@@ -2,7 +2,7 @@
 
 use std::time::{SystemTime, UNIX_EPOCH};
 
-use super::types::{ChatCompletionsUsage, PromptTokensDetails};
+use litellm_types::utils::{ChatCompletionsUsage, PromptTokensDetails};
 
 /// OpenAI finish reasons, mirroring Python's `_FINISH_REASON_MAP` for the
 /// reasons the providers on this route can emit. Python warns and falls back to
@@ -54,6 +54,17 @@ pub fn unix_now() -> u64 {
         .map_or(0, |elapsed| elapsed.as_secs())
 }
 
+pub fn json_type_name(value: &serde_json::Value) -> &'static str {
+    match value {
+        serde_json::Value::Null => "null",
+        serde_json::Value::Bool(_) => "boolean",
+        serde_json::Value::Number(_) => "number",
+        serde_json::Value::String(_) => "string",
+        serde_json::Value::Array(_) => "array",
+        serde_json::Value::Object(_) => "object",
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

litellm-rust/crates/core-utils/src/get_llm_provider_logic.rs

@@ -1,4 +1,36 @@
-pub use litellm_providers::provider_resolution::{CustomLlmProvider, get_custom_llm_provider};
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct CustomLlmProvider<'a> {
+    pub model: &'a str,
+    pub custom_llm_provider: &'a str,
+}
+
+pub fn get_custom_llm_provider<'a>(
+    model: &'a str,
+    custom_llm_provider: Option<&'a str>,
+) -> Option<CustomLlmProvider<'a>> {
+    if let Some(custom_llm_provider) = custom_llm_provider.filter(|provider| !provider.is_empty()) {
+        return Some(CustomLlmProvider {
+            model: strip_custom_llm_provider_prefix(model, custom_llm_provider),
+            custom_llm_provider,
+        });
+    }
+
+    let (custom_llm_provider, model) = model.split_once('/')?;
+    if custom_llm_provider.is_empty() || model.is_empty() {
+        return None;
+    }
+    Some(CustomLlmProvider {
+        model,
+        custom_llm_provider,
+    })
+}
+
+fn strip_custom_llm_provider_prefix<'a>(model: &'a str, custom_llm_provider: &str) -> &'a str {
+    model
+        .strip_prefix(custom_llm_provider)
+        .and_then(|model| model.strip_prefix('/'))
+        .unwrap_or(model)
+}
 
 #[cfg(test)]
 mod tests {

litellm-rust/crates/core-utils/src/lib.rs

@@ -0,0 +1,7 @@
+pub mod call_arguments;
+pub mod core_helpers;
+pub mod get_llm_provider_logic;
+pub mod params;
+pub mod prompt_templates;
+pub mod serde_compat;
+pub mod url_utils;

litellm-rust/crates/core-utils/src/prompt_templates/factory.rs

@@ -10,8 +10,10 @@
 //! `_bedrock_converse_messages_pt` for the text-only surface this route
 //! accepts; anything richer is declined upstream by the capability gate.
 
-use super::types::{ChatMessage, ChatMessageContent};
-use crate::chat::EMPTY_TEXT_PLACEHOLDER;
+use litellm_types::llms::openai::{ChatMessage, ChatMessageContent};
+
+pub const EMPTY_TEXT_PLACEHOLDER: &str =
+    "[System: Empty message content sanitised to satisfy protocol]";
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum TurnRole {
@@ -203,8 +205,10 @@ mod tests {
             {"role": "assistant", "content": "   "},
             {"role": "user", "content": "real"}
         ])));
-        assert_eq!(conversation.turns[0].texts, vec![EMPTY_TEXT_PLACEHOLDER]);
-        assert_eq!(conversation.turns[1].texts, vec![EMPTY_TEXT_PLACEHOLDER]);
+        // Must equal `_EMPTY_TEXT_PLACEHOLDER` in litellm/litellm_core_utils/prompt_templates/factory.py
+        let placeholder = "[System: Empty message content sanitised to satisfy protocol]";
+        assert_eq!(conversation.turns[0].texts, vec![placeholder]);
+        assert_eq!(conversation.turns[1].texts, vec![placeholder]);
     }
 
     #[test]

litellm-rust/crates/core-utils/src/prompt_templates/mod.rs

@@ -0,0 +1 @@
+pub mod factory;

litellm-rust/crates/core-utils/src/serde_compat.rs

@@ -2,8 +2,8 @@ use serde::{Deserialize, Deserializer, de::Error};
 use serde_json::Value;
 use serde_with::DeserializeAs;
 
-pub(crate) struct LaxI64;
-pub(crate) struct FiniteF64;
+pub struct LaxI64;
+pub struct FiniteF64;
 
 impl<'de> DeserializeAs<'de, i64> for LaxI64 {
     fn deserialize_as<D: Deserializer<'de>>(deserializer: D) -> Result<i64, D::Error> {

litellm-rust/crates/core-utils/src/url_utils.rs

@@ -3,33 +3,30 @@ use std::marker::PhantomData;
 use url::Url;
 
 #[derive(Debug, thiserror::Error)]
-pub(crate) enum ApiUrlError {
+pub enum ApiUrlError {
     #[error("invalid URL: {0}")]
     Parse(#[from] url::ParseError),
     #[error("URL cannot be used as a base")]
     CannotBeBase,
 }
 
-pub(crate) struct Base;
-pub(crate) struct Complete;
+pub struct Base;
+pub struct Complete;
 
-pub(crate) struct ApiUrl<State> {
+pub struct ApiUrl<State> {
     url: Url,
     state: PhantomData<State>,
 }
 
 impl ApiUrl<Base> {
-    pub(crate) fn parse(value: &str) -> Result<Self, ApiUrlError> {
+    pub fn parse(value: &str) -> Result<Self, ApiUrlError> {
         Ok(Self {
             url: Url::parse(value.trim())?,
             state: PhantomData,
         })
     }
 
-    pub(crate) fn complete_path(
-        mut self,
-        target: &[&str],
-    ) -> Result<ApiUrl<Complete>, ApiUrlError> {
+    pub fn complete_path(mut self, target: &[&str]) -> Result<ApiUrl<Complete>, ApiUrlError> {
         let existing: Vec<String> = self
             .url
             .path_segments()
@@ -59,7 +56,7 @@ impl ApiUrl<Base> {
 }
 
 impl ApiUrl<Complete> {
-    pub(crate) fn append_query_pairs<'a>(
+    pub fn append_query_pairs<'a>(
         mut self,
         pairs: impl IntoIterator<Item = (&'a str, &'a str)>,
     ) -> Self {
@@ -67,7 +64,7 @@ impl ApiUrl<Complete> {
         self
     }
 
-    pub(crate) fn into_string(self) -> String {
+    pub fn into_string(self) -> String {
         self.url.into()
     }
 }

litellm-rust/crates/core/AGENTS.md

@@ -1,27 +1,14 @@
 litellm-core is the LiteLLM SDK in Rust — it makes the LLM call. Each top-level call is a module under `src/<route>/` exposing a public entrypoint named after the route (`messages::messages()`, the Rust equivalent of `litellm.messages()`): you call it and get a typed non-streaming response back.
 
-A route module owns the call entrypoint, runtime types, provider/auth/URL resolution, and the handler that performs the HTTP call. Provider code and base config traits live under `src/llms/`, mirroring their Python source paths. This applies to every API surface: shared orchestration stays in its route module (`ocr/`, `chat_completions/`, `messages/`, `audio_transcription/`, or `responses/`), while provider transformations live under the corresponding Python-mirrored `llms/<provider>/` path. Import implementations directly from their canonical paths; do not add a `src/providers/` layer or compatibility re-exports. Shared provider resolution lives under `src/litellm_core_utils/get_llm_provider_logic.rs`. Handlers belong in core, never in a host crate
+## Crate layering
 
-Not here: serving HTTP (axum routes, extractors), config file reading, rollout state, databases, or callback execution of any kind. Core runs each route as a machine that yields host operations and call events; which integrations consume those events is the host's business. Env reads are limited to credential fallback in a route's `prepare.rs`.
+Each crate mirrors one top-level Python package, so a Rust path reads as its Python path with the crate name in place of the package directory. Dependencies only point down:
 
-Routes (messages, ocr, realtime) and providers (anthropic, mistral, openai) are modules, not crates.
+- `litellm-types` mirrors `litellm/types/`: pure serde data, no I/O
+- `litellm-core-utils` mirrors `litellm/litellm_core_utils/`: pure helpers (provider resolution, prompt factory, call arguments), no network I/O
+- `litellm-llms` mirrors `litellm/llms/`: `base_llm/<api>/transformation.rs`, `<provider>/<api>/transformation.rs`, and `custom_httpx/` (HTTP helpers and the OCR request handler)
+- `litellm-core` mirrors the route packages (`litellm/ocr/`, `litellm/messages/`, ...): entrypoints, route request types, provider dispatch, the route machine, and hooks
 
-## Python/Rust transformation pairs
+A route module owns the call entrypoint, route request types (`*Request<'a>`), credential fallback, provider dispatch, and the handler glue that runs a provider config. Provider code never imports from core; when it needs the caller's hooks mid-call it goes through `litellm_llms::custom_httpx::llm_http_handler::CallHooks`, which each route implements over its host. Import every item from its canonical path. Never re-export another crate's items or give an item a second public path; the only re-export allowed is a private submodule surfacing its item at its module root (`mod error; pub use error::Error;`). Handlers belong in core or llms, never in a host crate
 
-Use the base OCR and Mistral OCR pairs as the reference when aligning transformations. Derive `src/<relative_path>.rs` from `litellm/<relative_path>.py`, preserving meaningful basenames such as `messages_transformation`
-
-Keep corresponding operation names and parameter names when their responsibilities match. Rust types retain the Python semantic name with Rust acronym casing (`BaseOCRConfig` / `BaseOcrConfig`, `MistralOCRConfig` / `MistralOcrConfig`). Private Python helpers can drop their leading underscore. Give Rust adapter helpers distinct responsibility names rather than duplicating trait method names
-
-Order OCR config methods as supported parameters, credential metadata and connection resolution, health-check input, parameter mapping, environment validation, URL construction, request transformation, async request transformation, response transformation, async response transformation, and error conversion. Put constants and data types before the config, private helpers after it in operation order, and tests last. Rust-only trait hooks follow the corresponding Python methods
-
-Use trait defaults for unchanged inherited behavior and explicit delegation for shared provider behavior. Keep typed inputs, ownership, `Result`, and async I/O idiomatic. A matching path or symbol identifies the counterpart, not a claim of full behavioral parity
-
-Use named `#[rstest]` cases for independent input/output scenarios instead of loops or repeated calls in one test. Inject reusable setup with `#[fixture]` arguments and use `#[with(...)]` for fixture overrides. Keep assertions about the same result together
-
-For base OCR, Python response models correspond to `src/ocr/types.rs`; Rust context/environment types support the runtime. `BaseOcrConfig::prepare_request` corresponds to Python's HTTP-handler preparation rather than a `BaseOCRConfig` method, and `validate_request_body` is a Rust-only hook
-
-For Mistral, `async_transform_ocr_request` uses the base default in both languages. `resolve_headers` and `build_ocr_url` implement the respective environment and URL operations, and `normalize_response` implements the typed part of response transformation. Existing auth key/header handling and top-level response-extra preservation differ between languages; layout refactors must preserve those behaviors and verify them with the existing tests
-
-For non-OCR pairs, order corresponding methods as parameter support/mapping, environment validation, URL construction, request transformation, and response transformation, followed by Rust-only runtime hooks. Auth resolution remains split between configs and route preparation. Chat `supported_openai_param_mappings` describes accepted OpenAI/provider name pairs, unlike Python's `get_supported_openai_params` name list. Audio `map_transcription_params` remains a Rust filtering helper
-
-Azure Messages maps to `llms/azure_ai/anthropic/messages_transformation.py`; Bedrock Converse maps to `llms/bedrock/chat/converse_transformation.py`. `AnthropicConfig`, `AmazonConverseConfig`, and the non-OCR base traits are partial ports. `OpenAiResponsesApiConfig` currently implements only the WebSocket surface. Preserve their acceptance gates, passthrough behavior, and host fallback contracts when aligning layout
+Not here: serving HTTP (axum routes, extractors), config file reading, rollout state, databases, or callback execution of any kind. Core runs each route as a machine that yields host operations and call events; which integrations consume those events is the host's business.

litellm-rust/crates/core/Cargo.toml

@@ -7,17 +7,15 @@ repository.workspace = true
 autotests = false
 
 [dependencies]
+litellm-types.workspace = true
+litellm-core-utils.workspace = true
 litellm-callbacks.workspace = true
 bytes.workspace = true
 futures-util.workspace = true
 base64.workspace = true
-data-url = "0.3.2"
 litellm-auth.workspace = true
 litellm-auth-aws.workspace = true
-litellm-auth-azure.workspace = true
-litellm-auth-gcp.workspace = true
-litellm-providers.workspace = true
-litellm-framing.workspace = true
+litellm-llms.workspace = true
 moka.workspace = true
 mime_guess = "2.0.5"
 rand.workspace = true
@@ -26,8 +24,6 @@ rustls.workspace = true
 rustls-native-certs.workspace = true
 serde.workspace = true
 serde_json = { workspace = true, features = ["preserve_order"] }
-serde_with.workspace = true
-serde_path_to_error = "0.1"
 strum.workspace = true
 subtle.workspace = true
 tokio = { workspace = true, features = ["sync"] }
@@ -39,7 +35,6 @@ url.workspace = true
 veil.workspace = true
 
 [dev-dependencies]
-aws-smithy-eventstream = "=0.61.1"
-aws-smithy-types = "1.6.1"
+litellm-llms = { workspace = true, features = ["test-support"] }
 rstest.workspace = true
 rstest_reuse.workspace = true

litellm-rust/crates/core/src/audio_transcription/error.rs

@@ -1,3 +1,5 @@
+use litellm_llms::base_llm::chat::transformation::Error as LlmError;
+
 #[derive(Clone, Debug, PartialEq, Eq, thiserror::Error)]
 pub enum Error {
     #[error("expected {expected}, got {actual}")]
@@ -18,29 +20,22 @@ pub enum Error {
     #[error(transparent)]
     Auth(#[from] litellm_auth::Error),
     #[error(transparent)]
-    Transport(#[from] crate::transport::Error),
+    Transport(#[from] litellm_llms::custom_httpx::transport::Error),
     #[error(transparent)]
-    Headers(#[from] crate::http_utils::HeaderError),
+    Headers(#[from] litellm_llms::custom_httpx::http_handler::HeaderError),
     #[error(transparent)]
     Aws(#[from] litellm_auth_aws::Error),
 }
 
-impl From<litellm_providers::audio_transcription::Error> for Error {
-    fn from(error: litellm_providers::audio_transcription::Error) -> Self {
+impl From<LlmError> for Error {
+    fn from(error: LlmError) -> Self {
         match error {
-            litellm_providers::audio_transcription::Error::InvalidType { expected, actual } => {
-                Self::InvalidType { expected, actual }
-            }
-            litellm_providers::audio_transcription::Error::MissingField(field) => {
-                Self::MissingField(field)
-            }
-            litellm_providers::audio_transcription::Error::InvalidRequest(message) => {
-                Self::InvalidRequest(message)
-            }
-            litellm_providers::audio_transcription::Error::InvalidResponse(message) => {
-                Self::InvalidResponse(message)
-            }
-            litellm_providers::audio_transcription::Error::Auth(error) => Self::Auth(error),
+            LlmError::InvalidType { expected, actual } => Self::InvalidType { expected, actual },
+            LlmError::MissingField(field) => Self::MissingField(field),
+            LlmError::InvalidRequest(message) => Self::InvalidRequest(message),
+            LlmError::InvalidResponse(message) => Self::InvalidResponse(message),
+            LlmError::Unsupported(reason) => Self::Unsupported(reason),
+            LlmError::Auth(error) => Self::Auth(error),
         }
     }
 }

litellm-rust/crates/core/src/audio_transcription/handler.rs

@@ -1,7 +1,8 @@
+use litellm_llms::custom_httpx::http_handler::{http_request, truncate_error_body};
 use serde_json::Value;
 
-use super::{Error, client::http_client, types::ProviderAudioTranscriptionRequest};
-use crate::http_utils::{http_request, truncate_error_body};
+use super::{Error, client::http_client};
+use crate::audio_transcription::types::ProviderAudioTranscriptionRequest;
 
 pub async fn execute_audio_transcription_provider_call(
     request: ProviderAudioTranscriptionRequest,
@@ -16,19 +17,24 @@ pub async fn execute_audio_transcription_provider_call(
     if let Some(duration) = request.timeout {
         request_builder = request_builder.timeout(duration);
     }
-    let response = http_request(request_builder)
-        .await
-        .map_err(|error| Error::Transport(crate::transport::Error::Network(error.to_string())))?;
+    let response = http_request(request_builder).await.map_err(|error| {
+        Error::Transport(litellm_llms::custom_httpx::transport::Error::Network(
+            error.to_string(),
+        ))
+    })?;
     let status = response.status();
-    let text = response
-        .text()
-        .await
-        .map_err(|error| Error::Transport(crate::transport::Error::Network(error.to_string())))?;
+    let text = response.text().await.map_err(|error| {
+        Error::Transport(litellm_llms::custom_httpx::transport::Error::Network(
+            error.to_string(),
+        ))
+    })?;
     if !status.is_success() {
-        return Err(Error::Transport(crate::transport::Error::Http {
-            status: status.as_u16(),
-            body: truncate_error_body(&text),
-        }));
+        return Err(Error::Transport(
+            litellm_llms::custom_httpx::transport::Error::Http {
+                status: status.as_u16(),
+                body: truncate_error_body(&text),
+            },
+        ));
     }
     let response_json = serde_json::from_str(&text)
         .map_err(|error| Error::InvalidResponse(format!("invalid audio response JSON: {error}")))?;
@@ -45,7 +51,7 @@ async fn signed_headers(
     use std::{collections::BTreeMap, time::SystemTime};
 
     use litellm_auth_aws::{aws_auth_config, resolve_credentials, sign_bedrock_post};
-    use litellm_providers::base_llm::audio_transcription::transformation::AudioTranscriptionAuth;
+    use litellm_llms::base_llm::audio_transcription::transformation::AudioTranscriptionAuth;
 
     let AudioTranscriptionAuth::AwsSigV4 { region, .. } = &request.auth else {
         return Ok(request.upstream_headers.clone());

litellm-rust/crates/core/src/audio_transcription/mod.rs

@@ -1,13 +1,14 @@
 mod error;
+pub mod types;
 pub use error::Error;
 mod client;
 mod handler;
 mod prepare;
 pub use handler::execute_audio_transcription_provider_call;
-pub use litellm_providers::audio_transcription::types;
 pub use prepare::prepare_audio_transcription_provider_call;
 use serde_json::Value;
-pub use types::{AudioTranscriptionRequest, ProviderAudioTranscriptionRequest};
+
+use crate::audio_transcription::types::AudioTranscriptionRequest;
 
 pub async fn audio_transcription(request: AudioTranscriptionRequest<'_>) -> Result<Value, Error> {
     execute_audio_transcription_provider_call(prepare_audio_transcription_provider_call(request)?)

litellm-rust/crates/core/src/audio_transcription/prepare.rs

@@ -1,17 +1,15 @@
-use litellm_providers::{
+use litellm_core_utils::get_llm_provider_logic::{CustomLlmProvider, get_custom_llm_provider};
+use litellm_llms::{
     base_llm::audio_transcription::transformation::{
         AudioTranscriptionAuth, BaseAudioTranscriptionConfig,
     },
     bedrock::audio_transcription::BEDROCK_AUDIO_TRANSCRIPTION_CONFIG,
+    custom_httpx::http_handler::{has_header, string_headers},
 };
 
-use super::{
-    Error,
-    types::{AudioTranscriptionRequest, ProviderAudioTranscriptionRequest},
-};
-use crate::{
-    http_utils::{has_header, string_headers},
-    litellm_core_utils::get_llm_provider_logic::{CustomLlmProvider, get_custom_llm_provider},
+use super::Error;
+use crate::audio_transcription::types::{
+    AudioTranscriptionRequest, ProviderAudioTranscriptionRequest,
 };
 
 fn provider_config(provider: &str) -> Option<&'static dyn BaseAudioTranscriptionConfig> {

litellm-rust/crates/core/src/audio_transcription/tests.rs

@@ -6,7 +6,8 @@ use std::{
 
 use serde_json::{Map, json};
 
-use super::{audio_transcription, types::AudioTranscriptionRequest};
+use super::audio_transcription;
+use crate::audio_transcription::types::AudioTranscriptionRequest;
 
 #[tokio::test]
 async fn bedrock_request_is_signed_and_contains_audio() {

litellm-rust/crates/core/src/audio_transcription/types.rs

@@ -1,11 +1,9 @@
 use std::time::Duration;
 
-use serde::{Deserialize, Serialize};
-use serde_json::{Map, Value};
-
-use crate::base_llm::audio_transcription::transformation::{
+use litellm_llms::base_llm::audio_transcription::transformation::{
     AudioTranscriptionAuth, BaseAudioTranscriptionConfig,
 };
+use serde_json::{Map, Value};
 
 pub struct AudioTranscriptionRequest<'a> {
     pub model: &'a str,
@@ -52,21 +50,3 @@ impl ProviderAudioTranscriptionRequest {
         Self { body, ..self }
     }
 }
-
-#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
-pub struct AudioTranscriptionRequestData {
-    pub body: Value,
-}
-
-#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
-pub struct AudioTranscriptionResponseData {
-    pub text: String,
-}
-
-impl AudioTranscriptionResponseData {
-    pub fn into_json(self) -> Value {
-        serde_json::json!({
-            "text": self.text,
-        })
-    }
-}

litellm-rust/crates/core/src/chat_completions/common_utils.rs

@@ -1,20 +1,19 @@
-use litellm_providers::{
+use litellm_llms::{
     anthropic::chat::transformation::ANTHROPIC_CHAT_COMPLETIONS_CONFIG,
     base_llm::chat::transformation::BaseConfig,
+    bedrock::chat::converse_transformation::BEDROCK_CHAT_COMPLETIONS_CONFIG,
+    custom_httpx::http_handler::string_headers as shared_string_headers,
 };
 use serde_json::{Map, Value};
 
 use super::Error;
-use crate::http_utils::string_headers as shared_string_headers;
 
 const HEADER_CONTEXT: &str = "chat completions";
 
 pub(super) fn chat_completions_provider_config(provider: &str) -> Option<&'static dyn BaseConfig> {
     match provider {
         "anthropic" => Some(&ANTHROPIC_CHAT_COMPLETIONS_CONFIG),
-        "bedrock" => Some(
-            &litellm_providers::bedrock::chat::converse_transformation::BEDROCK_CHAT_COMPLETIONS_CONFIG,
-        ),
+        "bedrock" => Some(&BEDROCK_CHAT_COMPLETIONS_CONFIG),
         _ => None,
     }
 }

litellm-rust/crates/core/src/chat_completions/error.rs

@@ -1,3 +1,5 @@
+use litellm_llms::base_llm::chat::transformation::Error as LlmError;
+
 #[derive(Clone, Debug, PartialEq, Eq, thiserror::Error)]
 pub enum Error {
     #[error("expected {expected}, got {actual}")]
@@ -18,25 +20,22 @@ pub enum Error {
     #[error(transparent)]
     Auth(#[from] litellm_auth::Error),
     #[error(transparent)]
-    Transport(#[from] crate::transport::Error),
+    Transport(#[from] litellm_llms::custom_httpx::transport::Error),
     #[error(transparent)]
-    Headers(#[from] crate::http_utils::HeaderError),
+    Headers(#[from] litellm_llms::custom_httpx::http_handler::HeaderError),
     #[error(transparent)]
     Aws(#[from] litellm_auth_aws::Error),
 }
 
-impl From<litellm_providers::chat::Error> for Error {
-    fn from(error: litellm_providers::chat::Error) -> Self {
+impl From<LlmError> for Error {
+    fn from(error: LlmError) -> Self {
         match error {
-            litellm_providers::chat::Error::MissingField(field) => Self::MissingField(field),
-            litellm_providers::chat::Error::InvalidRequest(message) => {
-                Self::InvalidRequest(message)
-            }
-            litellm_providers::chat::Error::InvalidResponse(message) => {
-                Self::InvalidResponse(message)
-            }
-            litellm_providers::chat::Error::Unsupported(reason) => Self::Unsupported(reason),
-            litellm_providers::chat::Error::Auth(error) => Self::Auth(error),
+            LlmError::InvalidType { expected, actual } => Self::InvalidType { expected, actual },
+            LlmError::MissingField(field) => Self::MissingField(field),
+            LlmError::InvalidRequest(message) => Self::InvalidRequest(message),
+            LlmError::InvalidResponse(message) => Self::InvalidResponse(message),
+            LlmError::Unsupported(reason) => Self::Unsupported(reason),
+            LlmError::Auth(error) => Self::Auth(error),
         }
     }
 }

litellm-rust/crates/core/src/chat_completions/handler.rs

@@ -1,16 +1,14 @@
-use litellm_providers::base_llm::chat::transformation::ChatCompletionsAuth;
+use litellm_llms::{
+    base_llm::chat::transformation::{ChatCompletionsAuth, ProviderChatResponseData},
+    custom_httpx::http_handler::{http_request, truncate_error_body},
+};
+use litellm_types::utils::ChatCompletionsResponse;
 use serde_json::Value;
 
-use super::{
-    Error,
-    client::http_client,
-    prepare::prepare_provider_request,
-    types::{
-        ChatCompletionsResponse, ProviderChatCompletionsRequest, ProviderChatResponseData,
-        ResolvedChatCompletionsRequest,
-    },
+use super::{Error, client::http_client, prepare::prepare_provider_request};
+use crate::chat_completions::types::{
+    ProviderChatCompletionsRequest, ResolvedChatCompletionsRequest,
 };
-use crate::http_utils::{http_request, truncate_error_body};
 
 pub(super) async fn execute_chat_completions_provider_call(
     request: ResolvedChatCompletionsRequest<'_>,
@@ -36,23 +34,30 @@ pub(super) async fn execute_chat_completions_provider_call(
         // so the host can still serve it. Everything else here, a timeout
         // above all, may have reached the provider and been answered.
         if err.is_connect() || err.is_builder() {
-            Error::Transport(crate::transport::Error::Connect(err.to_string()))
+            Error::Transport(litellm_llms::custom_httpx::transport::Error::Connect(
+                err.to_string(),
+            ))
         } else {
-            Error::Transport(crate::transport::Error::Network(err.to_string()))
+            Error::Transport(litellm_llms::custom_httpx::transport::Error::Network(
+                err.to_string(),
+            ))
         }
     })?;
 
     let status = response.status();
-    let text = response
-        .text()
-        .await
-        .map_err(|err| Error::Transport(crate::transport::Error::Network(err.to_string())))?;
+    let text = response.text().await.map_err(|err| {
+        Error::Transport(litellm_llms::custom_httpx::transport::Error::Network(
+            err.to_string(),
+        ))
+    })?;
 
     if !status.is_success() {
-        return Err(Error::Transport(crate::transport::Error::Http {
-            status: status.as_u16(),
-            body: truncate_error_body(&text),
-        }));
+        return Err(Error::Transport(
+            litellm_llms::custom_httpx::transport::Error::Http {
+                status: status.as_u16(),
+                body: truncate_error_body(&text),
+            },
+        ));
     }
 
     let body: Value = serde_json::from_str(&text).map_err(|err| {
@@ -77,7 +82,9 @@ pub(super) async fn execute_chat_completions_provider_call(
 pub(super) fn as_response_error(err: Error) -> Error {
     match err {
         already @ (Error::InvalidResponse(_)
-        | Error::Transport(crate::transport::Error::Http { .. })) => already,
+        | Error::Transport(litellm_llms::custom_httpx::transport::Error::Http {
+            ..
+        })) => already,
         other => Error::InvalidResponse(other.to_string()),
     }
 }

litellm-rust/crates/core/src/chat_completions/mod.rs

@@ -7,18 +7,18 @@
 //! calls the provider, and returns a typed OpenAI-shaped response.
 
 mod error;
+pub mod types;
 pub use error::Error;
 mod client;
 mod common_utils;
-pub use litellm_providers::chat::{conversation, response_utils};
 pub(crate) mod handler;
 mod prepare;
-pub mod streaming;
 use handler::execute_chat_completions_provider_call;
-pub use litellm_providers::chat::types;
+use litellm_types::utils::ChatCompletionsResponse;
 use prepare::{parse_messages, resolve_provider_config, resolve_request};
 use serde_json::{Map, Value};
-use types::{ChatCompletionsRequest, ChatCompletionsResponse};
+
+use crate::chat_completions::types::ChatCompletionsRequest;
 
 pub async fn chat_completions(
     request: ChatCompletionsRequest<'_>,

litellm-rust/crates/core/src/chat_completions/prepare.rs

@@ -1,17 +1,17 @@
-use litellm_providers::base_llm::chat::transformation::{BaseConfig, ChatCompletionsAuth};
+use litellm_core_utils::get_llm_provider_logic::{CustomLlmProvider, get_custom_llm_provider};
+use litellm_llms::{
+    base_llm::chat::transformation::{BaseConfig, ChatCompletionsAuth},
+    custom_httpx::http_handler::has_header,
+};
+use litellm_types::llms::openai::ChatMessage;
 use serde_json::Value;
 
 use super::{
     Error,
     common_utils::{chat_completions_provider_config, string_headers},
-    types::{
-        ChatCompletionsRequest, ChatMessage, ProviderChatCompletionsRequest,
-        ResolvedChatCompletionsRequest,
-    },
 };
-use crate::{
-    http_utils::has_header,
-    litellm_core_utils::get_llm_provider_logic::{CustomLlmProvider, get_custom_llm_provider},
+use crate::chat_completions::types::{
+    ChatCompletionsRequest, ProviderChatCompletionsRequest, ResolvedChatCompletionsRequest,
 };
 
 pub(super) fn resolve_provider_config<'a>(

litellm-rust/crates/core/src/chat_completions/tests.rs

@@ -1,11 +1,11 @@
-use litellm_providers::base_llm::chat::transformation::ChatCompletionsAuth;
+use litellm_llms::base_llm::chat::transformation::ChatCompletionsAuth;
 use serde_json::{Map, Value, json};
 
 use super::{
     Error,
     prepare::{prepare_provider_request, resolve_request},
-    types::{ChatCompletionsRequest, ProviderChatCompletionsRequest},
 };
+use crate::chat_completions::types::{ChatCompletionsRequest, ProviderChatCompletionsRequest};
 
 fn prepare_chat_completions_call(
     request: ChatCompletionsRequest<'_>,
@@ -265,7 +265,7 @@ fn rejects_non_string_extra_headers() {
     call.extra_headers = Some(Map::from_iter([("x-trace".to_string(), json!(7))]));
     assert_eq!(
         decline(call),
-        Error::Headers(crate::http_utils::HeaderError {
+        Error::Headers(litellm_llms::custom_httpx::http_handler::HeaderError {
             context: "chat completions",
             name: "x-trace".to_string(),
             actual: "number",
@@ -771,7 +771,10 @@ mod round_trip {
         assert!(
             matches!(
                 err,
-                Error::Transport(crate::transport::Error::Http { status: 429, .. })
+                Error::Transport(litellm_llms::custom_httpx::transport::Error::Http {
+                    status: 429,
+                    ..
+                })
             ),
             "expected a 429, got {err:?}"
         );
@@ -796,7 +799,10 @@ mod round_trip {
         .await
         .expect_err("nothing is listening");
         assert!(
-            matches!(err, Error::Transport(crate::transport::Error::Connect(_))),
+            matches!(
+                err,
+                Error::Transport(litellm_llms::custom_httpx::transport::Error::Connect(_))
+            ),
             "expected a pre-send connect failure, got {err:?}"
         );
     }
@@ -819,11 +825,16 @@ mod round_trip {
         }
         // An upstream status is already unambiguous, so it survives intact.
         assert!(matches!(
-            as_response_error(Error::Transport(crate::transport::Error::Http {
+            as_response_error(Error::Transport(
+                litellm_llms::custom_httpx::transport::Error::Http {
+                    status: 500,
+                    body: "boom".to_string()
+                }
+            )),
+            Error::Transport(litellm_llms::custom_httpx::transport::Error::Http {
                 status: 500,
-                body: "boom".to_string()
-            })),
-            Error::Transport(crate::transport::Error::Http { status: 500, .. })
+                ..
+            })
         ));
     }
 }

litellm-rust/crates/core/src/chat_completions/types.rs

@@ -0,0 +1,44 @@
+use std::time::Duration;
+
+use litellm_llms::base_llm::chat::transformation::{BaseConfig, ChatCompletionsAuth};
+use litellm_types::llms::openai::ChatMessage;
+use serde_json::{Map, Value};
+
+/// A `/chat/completions` call as it crosses into the core.
+///
+/// `optional_params` arrives already mapped to the provider's own parameter
+/// names by the host, exactly as the messages route receives an already
+/// Anthropic-shaped body. The core owns the conversation translation, the
+/// provider call, and the response normalization.
+pub struct ChatCompletionsRequest<'a> {
+    pub model: &'a str,
+    pub messages: Value,
+    pub optional_params: Map<String, Value>,
+    pub api_key: Option<&'a str>,
+    pub api_base: Option<&'a str>,
+    pub custom_llm_provider: Option<&'a str>,
+    pub extra_headers: Option<Map<String, Value>>,
+    pub timeout: Option<Duration>,
+}
+
+pub struct ResolvedChatCompletionsRequest<'a> {
+    pub model: String,
+    pub config: &'static dyn BaseConfig,
+    pub messages: Vec<ChatMessage>,
+    pub optional_params: Map<String, Value>,
+    pub api_key: Option<&'a str>,
+    pub api_base: Option<&'a str>,
+    pub extra_headers: Option<Map<String, Value>>,
+    pub timeout: Option<Duration>,
+}
+
+pub struct ProviderChatCompletionsRequest {
+    pub model: String,
+    pub config: &'static dyn BaseConfig,
+    pub url: String,
+    pub body: Value,
+    pub upstream_headers: Vec<(String, String)>,
+    pub auth: ChatCompletionsAuth,
+    pub optional_params: Map<String, Value>,
+    pub timeout: Option<Duration>,
+}

litellm-rust/crates/core/src/constants.rs

@@ -1,6 +1,4 @@
 pub const OPENAI_DEFAULT_API_BASE: &str = "https://api.openai.com";
-pub const OPENAI_RESPONSES_DEFAULT_API_BASE: &str = "https://api.openai.com/v1";
-pub const OPENAI_RESPONSES_PATH: &str = "/responses";
 
 /// Full-request timeout ceiling for Anthropic Messages provider calls, in
 /// seconds. Mirrors the Python Anthropic Messages default. The per-request
@@ -10,19 +8,10 @@ pub(crate) const MESSAGES_TIMEOUT_SECS: u64 = 600;
 /// Connect timeout for Anthropic Messages provider calls, in seconds.
 pub(crate) const MESSAGES_CONNECT_TIMEOUT_SECS: u64 = 10;
 
-/// Max characters of an upstream error body echoed across the call boundary
-/// before truncation, so provider bodies are bounded and data-minimized.
-pub(crate) const UPSTREAM_ERROR_BODY_MAX_CHARS: usize = 256;
-
 /// Provider name used for Anthropic Messages when a deployment's provider model
 /// does not carry an explicit provider prefix.
 pub const ANTHROPIC_MESSAGES_PROVIDER: &str = "anthropic";
 
-/// Prefix identifying an Anthropic OAuth token. Mirrors Python's
-/// `ANTHROPIC_OAUTH_TOKEN_PREFIX`, which is what makes `validate_environment`
-/// authenticate with `authorization` and drop `x-api-key` entirely.
-pub(crate) const ANTHROPIC_OAUTH_TOKEN_PREFIX: &str = "sk-ant-oat";
-
 /// Full-request timeout ceiling for chat completions provider calls, in
 /// seconds. Mirrors the Python chat completions default.
 pub(crate) const CHAT_COMPLETIONS_TIMEOUT_SECS: u64 = 600;
@@ -34,34 +23,3 @@ pub(crate) const AUDIO_TRANSCRIPTION_TIMEOUT_SECS: u64 = 600;
 
 /// `object` field every non-streaming chat completion response carries.
 pub const CHAT_COMPLETION_OBJECT: &str = "chat.completion";
-
-/// Placeholder Python substitutes for empty or whitespace-only message text,
-/// which Anthropic and Bedrock both reject. Must match
-/// `_EMPTY_TEXT_PLACEHOLDER` in
-/// `litellm/litellm_core_utils/prompt_templates/factory.py`.
-pub const EMPTY_TEXT_PLACEHOLDER: &str =
-    "[System: Empty message content sanitised to satisfy protocol]";
-
-pub(crate) const MEDIA_CONNECT_TIMEOUT_SECS: u64 = 10;
-
-pub(crate) const OCR_RESPONSE_MAX_BYTES: usize = 64 * 1024 * 1024;
-pub(crate) const OCR_HTTP_TIMEOUT_SECS: u64 = 600;
-pub(crate) const OCR_CONNECT_TIMEOUT_SECS: u64 = 10;
-pub const OCR_INLINE_MAX_BYTES: usize = 50 * 1024 * 1024;
-pub(crate) const OCR_DOWNLOAD_MAX_BYTES: u64 = 50 * 1024 * 1024;
-pub(crate) const OCR_MAX_FETCH_REDIRECTS: usize = 10;
-pub(crate) const OCR_POLL_TIMEOUT_SECS: u64 = 120;
-pub(crate) const OCR_POLL_RETRY_SECS: u64 = 2;
-pub(crate) const AZURE_DI_API_VERSION: &str = "2024-11-30";
-pub(crate) const AZURE_DI_SUBSCRIPTION_HEADER: &str = "Ocp-Apim-Subscription-Key";
-pub(crate) const AZURE_DI_DEFAULT_DPI: i64 = 96;
-pub(crate) const AZURE_DI_DEFAULT_WIDTH: f64 = 8.5;
-pub(crate) const AZURE_DI_DEFAULT_HEIGHT: f64 = 11.0;
-pub(crate) const REDUCTO_API_BASE: &str = "https://platform.reducto.ai";
-pub(crate) const REDUCTO_API_KEY_ENV: &str = "REDUCTO_API_KEY";
-pub(crate) const REDUCTO_ID_PREFIX: &str = "reducto://";
-pub(crate) const AZURE_AI_OCR_PATH: &str = "/providers/mistral/azure/ocr";
-pub(crate) const MISTRAL_OCR_API_BASE: &str = "https://api.mistral.ai/v1";
-
-pub(crate) const COHERE_PARSE_API_BASE: &str = "https://api.cohere.com";
-pub(crate) const COHERE_API_KEY_ENV: &str = "COHERE_API_KEY";

litellm-rust/crates/core/src/error.rs

@@ -1,7 +1,9 @@
+use litellm_llms::base_llm::ocr::error::Error as OcrError;
+
 #[derive(Debug, thiserror::Error)]
 pub enum Error {
     #[error(transparent)]
-    Ocr(#[from] crate::ocr::Error),
+    Ocr(#[from] OcrError),
     #[error(transparent)]
     Messages(#[from] crate::messages::Error),
     #[error(transparent)]

litellm-rust/crates/core/src/lib.rs

@@ -1,19 +1,10 @@
 pub mod audio_transcription;
-pub mod call_arguments;
 pub mod chat_completions;
 pub mod constants;
 pub mod error;
-pub mod http_utils;
-pub mod litellm_core_utils;
-pub mod llms;
 pub mod machine;
-mod media;
 pub mod messages;
 pub mod ocr;
-pub mod params;
 pub mod responses;
-mod serde_compat;
-pub mod transport;
-mod url_utils;
 
 pub use error::Error;

litellm-rust/crates/core/src/litellm_core_utils/mod.rs

@@ -1 +0,0 @@
-pub mod get_llm_provider_logic;

litellm-rust/crates/core/src/llms/anthropic/chat/mod.rs

@@ -1 +0,0 @@
-pub mod streaming;

litellm-rust/crates/core/src/llms/anthropic/experimental_pass_through/messages/mod.rs

@@ -1,3 +0,0 @@
-pub mod batches;
-pub mod count_tokens;
-pub mod streaming;

litellm-rust/crates/core/src/llms/anthropic/mod.rs

@@ -1,2 +0,0 @@
-pub mod chat;
-pub mod experimental_pass_through;

litellm-rust/crates/core/src/llms/azure_ai/mod.rs

@@ -1 +0,0 @@
-pub(crate) mod ocr;

litellm-rust/crates/core/src/llms/azure_ai/ocr/document_intelligence/mod.rs

@@ -1 +0,0 @@
-pub(crate) mod transformation;

litellm-rust/crates/core/src/llms/azure_ai/ocr/mod.rs

@@ -1,4 +0,0 @@
-pub(crate) mod cohere_parse_transformation;
-pub(crate) mod common_utils;
-pub(crate) mod document_intelligence;
-pub(crate) mod transformation;

litellm-rust/crates/core/src/llms/azure_ai/ocr/transformation.rs

@@ -1,615 +0,0 @@
-use litellm_auth::{InputSource, Sourced};
-use litellm_auth_azure::AzureAuthInputs;
-use serde_json::Value;
-
-use crate::call_arguments::CallArguments;
-use crate::constants::AZURE_AI_OCR_PATH;
-use crate::llms::base_llm::ocr::transformation::{BaseOcrConfig, OcrRequestContext};
-use crate::llms::mistral::ocr::transformation::{MistralOcrConfig, MistralOcrRequest};
-use crate::ocr::OcrClient;
-use crate::ocr::document::{inline_remote_document, validate_inline_document};
-use crate::ocr::prepare::credential_env;
-use crate::ocr::types::{LiteLLMOcrResponse, OcrConnection, OcrDocument, PreparedOcrRequest};
-use crate::params::OpaqueParams;
-use crate::url_utils::ApiUrl;
-
-const AZURE_AI_API_KEY_ENV: &str = "AZURE_AI_API_KEY";
-const AZURE_AI_API_BASE_ENV: &str = "AZURE_AI_API_BASE";
-
-#[derive(Clone, Debug, Default)]
-pub(crate) struct AzureAiOcrConfig;
-
-impl BaseOcrConfig for AzureAiOcrConfig {
-    type OcrParams = OpaqueParams;
-    type ProviderRequest = MistralOcrRequest;
-    type Environment = Vec<(String, String)>;
-
-    fn get_supported_ocr_params(&self, model: &str) -> &'static [&'static str] {
-        MistralOcrConfig.get_supported_ocr_params(model)
-    }
-
-    fn get_api_key_env_var(&self) -> Option<&'static str> {
-        Some(AZURE_AI_API_KEY_ENV)
-    }
-
-    fn map_ocr_params(
-        &self,
-        non_default_params: &CallArguments,
-        model: &str,
-    ) -> Result<OpaqueParams, crate::ocr::Error> {
-        MistralOcrConfig.map_ocr_params(non_default_params, model)
-    }
-
-    async fn validate_environment(
-        &self,
-        request: &PreparedOcrRequest,
-        _client: &OcrClient,
-    ) -> Result<Self::Environment, crate::ocr::Error> {
-        let config = AzureAuthInputs {
-            azure_ad_token_provider: request.azure_ad_token_provider.clone(),
-            ..AzureAuthInputs::from_sourced_optional_params(
-                &request.optional_params,
-                &request.input_sources,
-            )?
-        };
-        self.resolve_headers(&request.connection, &config, &credential_env)
-            .await
-    }
-
-    fn get_complete_url(
-        &self,
-        request: &PreparedOcrRequest,
-        _optional_params: &Self::OcrParams,
-        _environment: &Self::Environment,
-    ) -> Result<String, crate::ocr::Error> {
-        self.build_ocr_url(request.connection.api_base.as_deref(), &credential_env)
-    }
-
-    fn transform_ocr_request(
-        &self,
-        model: &str,
-        document: OcrDocument,
-        optional_params: &OpaqueParams,
-        headers: &[(String, String)],
-    ) -> Result<MistralOcrRequest, crate::ocr::Error> {
-        MistralOcrConfig.transform_ocr_request(model, document, optional_params, headers)
-    }
-
-    async fn async_transform_ocr_request(
-        &self,
-        model: &str,
-        document: OcrDocument,
-        optional_params: &OpaqueParams,
-        headers: &[(String, String)],
-        context: OcrRequestContext<'_>,
-    ) -> Result<MistralOcrRequest, crate::ocr::Error> {
-        let document = inline_remote_document(
-            context.client.document_fetcher(),
-            document,
-            context.connection,
-        )
-        .await?;
-        self.transform_ocr_request(model, document, optional_params, headers)
-    }
-
-    fn transform_ocr_response(
-        &self,
-        model: &str,
-        raw_response: &[u8],
-        request_format: crate::ocr::types::OcrResponseFormat,
-    ) -> Result<LiteLLMOcrResponse, crate::ocr::Error> {
-        MistralOcrConfig.transform_ocr_response(model, raw_response, request_format)
-    }
-
-    fn validate_request_body(&self, body: &Value) -> Result<(), crate::ocr::Error> {
-        validate_inline_document(&crate::ocr::prepare::body_document(body)?)
-    }
-}
-
-impl AzureAiOcrConfig {
-    /// Python `AzureAIOCRConfig.validate_environment` requires the endpoint
-    /// before it resolves credentials; keep that order so a missing base is
-    /// reported without invoking any token provider.
-    pub(super) fn resolve_api_base(
-        api_base: Option<&str>,
-        env_lookup: &dyn Fn(&str) -> Option<String>,
-    ) -> Result<String, crate::ocr::Error> {
-        nonblank(api_base.map(str::to_string))
-            .or_else(|| nonblank(env_lookup(AZURE_AI_API_BASE_ENV)))
-            .ok_or(crate::ocr::Error::Auth(
-                litellm_auth::Error::MissingApiBase {
-                    provider: "Azure AI",
-                    environment_variable: AZURE_AI_API_BASE_ENV,
-                },
-            ))
-    }
-
-    async fn resolve_headers(
-        &self,
-        connection: &OcrConnection,
-        config: &AzureAuthInputs,
-        env_lookup: &(dyn Fn(&str) -> Option<String> + Sync),
-    ) -> Result<Vec<(String, String)>, crate::ocr::Error> {
-        Self::resolve_api_base(connection.api_base.as_deref(), env_lookup)?;
-        if crate::http_utils::has_header(&connection.extra_headers, "authorization") {
-            if config.azure_ad_token_provider.is_some() {
-                super::common_utils::resolve_entra(config, env_lookup).await?;
-            }
-            super::common_utils::validate_destination(connection, connection.extra_headers_source)?;
-            return Ok(connection.extra_headers.clone());
-        }
-        let key = nonblank(connection.api_key.clone())
-            .map(|value| Sourced::new(value, connection.api_key_source))
-            .or_else(|| {
-                nonblank(self.get_api_key_env_var().and_then(env_lookup))
-                    .map(|value| Sourced::new(value, InputSource::Environment))
-            });
-        if let Some(key) = key {
-            super::common_utils::validate_destination(connection, key.source())?;
-            return Ok(bearer_headers(connection, key.value()));
-        }
-        let key = super::common_utils::resolve_entra(config, env_lookup)
-            .await?
-            .ok_or(crate::ocr::Error::MissingAzureAiCredentials)?;
-        super::common_utils::validate_destination(connection, key.source())?;
-        Ok(bearer_headers(connection, key.value()))
-    }
-
-    fn build_ocr_url(
-        &self,
-        api_base: Option<&str>,
-        env_lookup: &dyn Fn(&str) -> Option<String>,
-    ) -> Result<String, crate::ocr::Error> {
-        let base = Self::resolve_api_base(api_base, env_lookup)?;
-        let path: Vec<&str> = AZURE_AI_OCR_PATH.trim_matches('/').split('/').collect();
-        ApiUrl::parse(&base)
-            .and_then(|url| url.complete_path(&path))
-            .map(|url| url.into_string())
-            .map_err(|_| crate::ocr::Error::RequestField {
-                path: "api_base".into(),
-            })
-    }
-}
-
-fn bearer_headers(connection: &OcrConnection, key: &str) -> Vec<(String, String)> {
-    std::iter::once(("Authorization".into(), format!("Bearer {key}")))
-        .chain(connection.extra_headers.clone())
-        .collect()
-}
-
-fn nonblank(value: Option<String>) -> Option<String> {
-    value
-        .map(|value| value.trim().to_string())
-        .filter(|value| !value.is_empty())
-}
-
-#[cfg(test)]
-mod tests {
-    use rstest::{fixture, rstest};
-
-    use super::*;
-
-    #[fixture]
-    fn connection() -> OcrConnection {
-        OcrConnection {
-            api_key: Some("request-key".into()),
-            api_base: Some("https://example.com".into()),
-            ..Default::default()
-        }
-    }
-
-    #[rstest]
-    #[case::base_with_query(
-        "https://example.com/?tenant=a",
-        "https://example.com/providers/mistral/azure/ocr?tenant=a"
-    )]
-    #[case::complete_endpoint(
-        "https://example.com/providers/mistral/azure/ocr",
-        "https://example.com/providers/mistral/azure/ocr"
-    )]
-    fn completes_azure_path_and_preserves_query(#[case] api_base: &str, #[case] expected: &str) {
-        assert_eq!(
-            AzureAiOcrConfig
-                .build_ocr_url(Some(api_base), &|_| None)
-                .unwrap(),
-            expected
-        );
-    }
-
-    #[test]
-    fn missing_api_base_is_structured() {
-        assert!(matches!(
-            AzureAiOcrConfig::resolve_api_base(None, &|_| None),
-            Err(crate::ocr::Error::Auth(
-                litellm_auth::Error::MissingApiBase {
-                    provider: "Azure AI",
-                    environment_variable: AZURE_AI_API_BASE_ENV,
-                }
-            ))
-        ));
-    }
-
-    #[rstest]
-    #[tokio::test]
-    async fn supplied_authorization_precedes_keys(connection: OcrConnection) {
-        let connection = OcrConnection {
-            extra_headers: vec![("authorization".into(), "Bearer prepared".into())],
-            ..connection
-        };
-        assert_eq!(
-            AzureAiOcrConfig
-                .resolve_headers(&connection, &Default::default(), &|_| {
-                    Some("environment-key".into())
-                })
-                .await
-                .unwrap(),
-            connection.extra_headers
-        );
-    }
-
-    #[rstest]
-    #[tokio::test]
-    async fn request_key_precedes_environment_key(connection: OcrConnection) {
-        assert_eq!(
-            AzureAiOcrConfig
-                .resolve_headers(&connection, &Default::default(), &|_| {
-                    Some("environment-key".into())
-                })
-                .await
-                .unwrap()[0],
-            ("Authorization".into(), "Bearer request-key".into())
-        );
-    }
-
-    #[tokio::test]
-    async fn request_endpoint_cannot_receive_environment_key() {
-        let connection = OcrConnection {
-            api_base: Some("https://request.example".into()),
-            api_base_source: InputSource::Request,
-            ..Default::default()
-        };
-
-        let error = AzureAiOcrConfig
-            .resolve_headers(&connection, &Default::default(), &|name| {
-                (name == AZURE_AI_API_KEY_ENV).then(|| "environment-key".into())
-            })
-            .await
-            .unwrap_err();
-
-        assert!(
-            error
-                .to_string()
-                .contains("request-controlled Azure endpoint")
-        );
-    }
-
-    #[tokio::test]
-    async fn request_endpoint_accepts_request_owned_key() {
-        let connection = OcrConnection {
-            api_key: Some("request-key".into()),
-            api_key_source: InputSource::Request,
-            api_base: Some("https://request.example".into()),
-            api_base_source: InputSource::Request,
-            ..Default::default()
-        };
-
-        let headers = AzureAiOcrConfig
-            .resolve_headers(&connection, &Default::default(), &|_| None)
-            .await
-            .unwrap();
-
-        assert_eq!(
-            headers[0],
-            ("Authorization".into(), "Bearer request-key".into())
-        );
-    }
-
-    use serde_json::json;
-
-    use crate::ocr::LocalOcrHost;
-    use crate::ocr::test_support::{
-        MockResponse, mock_server, perform_ocr, perform_ocr_with, wire_request,
-    };
-
-    #[tokio::test]
-    async fn facade_executes_azure_mistral_with_prepared_auth() {
-        let (base, seen, server) = mock_server(vec![MockResponse::json(json!({
-            "pages":[{"index":0,"markdown":"hello"}],
-            "usage_info":{"pages_processed":1}
-        }))])
-        .await;
-        let mut request = wire_request(
-            "azure_ai/model",
-            &base,
-            json!({"include_image_base64":true}),
-        );
-        request.credentials.api_key = None;
-        request.transport.extra_headers = vec![(
-            "Authorization".into(),
-            "Bearer python-prepared-token".into(),
-        )];
-
-        let result = perform_ocr(request).await.unwrap();
-        server.await.unwrap();
-        assert_eq!(result.pages[0].markdown, "hello");
-        let requests = seen.lock().unwrap();
-        assert_eq!(requests.len(), 1);
-        assert!(requests[0].starts_with("POST /providers/mistral/azure/ocr "));
-        assert!(
-            requests[0]
-                .to_ascii_lowercase()
-                .contains("authorization: bearer python-prepared-token\r\n")
-        );
-        let body: Value =
-            serde_json::from_str(requests[0].split_once("\r\n\r\n").unwrap().1).unwrap();
-        assert_eq!(
-            body,
-            json!({
-                "model":"model",
-                "document":{"type":"document_url","document_url":"data:application/pdf;base64,YWJj"},
-                "include_image_base64":true
-            })
-        );
-    }
-
-    #[tokio::test]
-    async fn facade_acquires_supplied_entra_token_for_final_request() {
-        let (base, seen, server) = mock_server(vec![MockResponse::json(json!({"pages":[]}))]).await;
-        let mut request = wire_request(
-            "azure_ai/model",
-            &base,
-            json!({"azure_ad_token":"rust-owned-token"}),
-        );
-        request.credentials.api_key = None;
-
-        perform_ocr(request).await.unwrap();
-        server.await.unwrap();
-
-        let requests = seen.lock().unwrap();
-        assert_eq!(requests.len(), 1);
-        assert!(
-            requests[0]
-                .to_ascii_lowercase()
-                .contains("authorization: bearer rust-owned-token\r\n")
-        );
-    }
-
-    #[tokio::test]
-    async fn rejects_non_inline_body_after_guardrails() {
-        let request = wire_request("azure_ai/model", "http://127.0.0.1:1", json!({}));
-        let host = LocalOcrHost::new(request).with_before_send(|mut wire, _| {
-            wire.body["document"] = json!({
-                "type":"document_url",
-                "document_url":"https://example.com/not-inline.pdf"
-            });
-            Ok(wire)
-        });
-        let error = perform_ocr_with(host).await.unwrap_err();
-        assert!(error.to_string().contains("data URI"));
-    }
-
-    use std::sync::Arc;
-    use std::sync::atomic::{AtomicUsize, Ordering};
-
-    use litellm_auth::{
-        ResolvedCredential, SecretValue, TokenFuture, TokenProvider, TokenProviderHandle,
-    };
-
-    use crate::ocr::LiteLLMOcrRequest;
-    use crate::ocr::test_support::header;
-    use crate::ocr::wire::decode_request;
-
-    #[derive(Debug)]
-    struct CountingToken {
-        token: fn(usize) -> String,
-        calls: AtomicUsize,
-    }
-
-    impl CountingToken {
-        fn new(token: fn(usize) -> String) -> Arc<Self> {
-            Arc::new(Self {
-                token,
-                calls: AtomicUsize::new(0),
-            })
-        }
-
-        fn calls(&self) -> usize {
-            self.calls.load(Ordering::SeqCst)
-        }
-    }
-
-    impl TokenProvider for CountingToken {
-        fn acquire(&self) -> TokenFuture<'_> {
-            let call = self.calls.fetch_add(1, Ordering::SeqCst) + 1;
-            let token = SecretValue::new((self.token)(call));
-            Box::pin(async move {
-                Ok(ResolvedCredential::AccessToken {
-                    token,
-                    expires_on: None,
-                })
-            })
-        }
-    }
-
-    fn numbered_token(call: usize) -> String {
-        format!("callback-{call}")
-    }
-
-    fn azure_request(
-        provider: &Arc<CountingToken>,
-        api_base: Option<&str>,
-        api_key: Option<&str>,
-        extra_headers: Value,
-        optional_params: Value,
-    ) -> LiteLLMOcrRequest {
-        let wire = serde_json::from_value(json!({
-            "model": "azure_ai/mistral-ocr-latest",
-            "document": {"type":"document_url","document_url":"data:application/pdf;base64,YWJj"},
-            "api_key": api_key,
-            "api_base": api_base,
-            "custom_llm_provider": null,
-            "extra_headers": extra_headers,
-            "optional_params": optional_params,
-            "timeout_seconds": 2.0
-        }))
-        .unwrap();
-        LiteLLMOcrRequest {
-            azure_ad_token_provider: Some(TokenProviderHandle::new(provider.clone())),
-            ..decode_request(wire).unwrap()
-        }
-    }
-
-    fn ocr_page() -> MockResponse {
-        MockResponse::json(json!({"pages":[{"index":0,"markdown":"hello"}]}))
-    }
-
-    #[tokio::test]
-    async fn token_provider_result_is_the_bearer_and_is_acquired_for_each_request() {
-        let provider = CountingToken::new(numbered_token);
-        let (base, seen, server) = mock_server(vec![ocr_page(), ocr_page()]).await;
-
-        for _ in 0..2 {
-            perform_ocr(azure_request(
-                &provider,
-                Some(&base),
-                None,
-                Value::Null,
-                json!({}),
-            ))
-            .await
-            .unwrap();
-        }
-        server.await.unwrap();
-
-        assert_eq!(provider.calls(), 2);
-        let requests = seen.lock().unwrap();
-        assert_eq!(
-            requests
-                .iter()
-                .map(|request| header(request, "authorization"))
-                .collect::<Vec<_>>(),
-            [Some("Bearer callback-1"), Some("Bearer callback-2")]
-        );
-    }
-
-    #[rstest]
-    #[case::api_key_skips_provider(Some("resource-key"), Value::Null, json!({}), "Bearer resource-key", 0)]
-    #[case::provider_beats_static_token(
-        None,
-        Value::Null,
-        json!({"azure_ad_token":"static-token"}),
-        "Bearer callback-1",
-        1
-    )]
-    #[case::header_wins_on_the_wire_but_provider_still_runs(
-        None,
-        json!({"Authorization":"Bearer override"}),
-        json!({}),
-        "Bearer override",
-        1
-    )]
-    #[tokio::test]
-    async fn credential_precedence(
-        #[case] api_key: Option<&str>,
-        #[case] extra_headers: Value,
-        #[case] optional_params: Value,
-        #[case] expected_authorization: &str,
-        #[case] expected_calls: usize,
-    ) {
-        let provider = CountingToken::new(numbered_token);
-        let (base, seen, server) = mock_server(vec![ocr_page()]).await;
-
-        perform_ocr(azure_request(
-            &provider,
-            Some(&base),
-            api_key,
-            extra_headers,
-            optional_params,
-        ))
-        .await
-        .unwrap();
-        server.await.unwrap();
-
-        assert_eq!(provider.calls(), expected_calls);
-        let requests = seen.lock().unwrap();
-        assert_eq!(requests.len(), 1);
-        assert_eq!(
-            header(&requests[0], "authorization"),
-            Some(expected_authorization)
-        );
-    }
-
-    #[rstest]
-    #[case::missing_api_base(
-        false,
-        json!({}),
-        numbered_token,
-        |error: &crate::ocr::Error| matches!(error, crate::ocr::Error::Auth(litellm_auth::Error::MissingApiBase {
-            provider: "Azure AI",
-            environment_variable: AZURE_AI_API_BASE_ENV,
-        })),
-        0
-    )]
-    #[case::unsupported_oidc_reference(
-        true,
-        json!({"azure_ad_token":"oidc/assertion","client_id":"client","tenant_id":"tenant"}),
-        numbered_token,
-        |error: &crate::ocr::Error| matches!(error, crate::ocr::Error::Auth(litellm_auth::Error::UnsupportedOidcReference)),
-        0
-    )]
-    #[case::empty_provider_token_ignores_static_token(
-        true,
-        json!({"azure_ad_token":"static-token"}),
-        |_| String::new(),
-        |error: &crate::ocr::Error| matches!(error, crate::ocr::Error::MissingAzureAiCredentials),
-        1
-    )]
-    #[tokio::test]
-    async fn credential_failures_send_no_provider_request(
-        #[case] with_api_base: bool,
-        #[case] optional_params: Value,
-        #[case] token: fn(usize) -> String,
-        #[case] expected: fn(&crate::ocr::Error) -> bool,
-        #[case] expected_calls: usize,
-    ) {
-        let provider = CountingToken::new(token);
-        let (base, seen, server) = mock_server(vec![ocr_page()]).await;
-
-        let error = perform_ocr(azure_request(
-            &provider,
-            with_api_base.then_some(base.as_str()),
-            None,
-            Value::Null,
-            optional_params,
-        ))
-        .await
-        .unwrap_err();
-        server.abort();
-
-        assert!(expected(&error), "unexpected error: {error:?}");
-        assert_eq!(provider.calls(), expected_calls);
-        assert!(seen.lock().unwrap().is_empty());
-    }
-
-    #[tokio::test]
-    async fn environment_supplies_api_base_and_bearer_key() {
-        let env = |name: &str| match name {
-            AZURE_AI_API_BASE_ENV => Some("https://env.example".to_string()),
-            AZURE_AI_API_KEY_ENV => Some("env-key".to_string()),
-            _ => None,
-        };
-        let connection = OcrConnection::default();
-
-        let headers = AzureAiOcrConfig
-            .resolve_headers(&connection, &Default::default(), &env)
-            .await
-            .unwrap();
-        let url = AzureAiOcrConfig.build_ocr_url(None, &env).unwrap();
-
-        assert_eq!(
-            headers,
-            [("Authorization".to_string(), "Bearer env-key".to_string())]
-        );
-        assert_eq!(url, "https://env.example/providers/mistral/azure/ocr");
-    }
-}

litellm-rust/crates/core/src/llms/base_llm/mod.rs

@@ -1 +0,0 @@
-pub(crate) mod ocr;

litellm-rust/crates/core/src/llms/base_llm/ocr/mod.rs

@@ -1 +0,0 @@
-pub(crate) mod transformation;

litellm-rust/crates/core/src/llms/base_llm/ocr/transformation.rs

@@ -1,213 +0,0 @@
-use std::future::Future;
-
-use serde::{Serialize, de::DeserializeOwned};
-use serde_json::Value;
-
-use crate::{
-    call_arguments::CallArguments,
-    ocr::{
-        OcrClient,
-        route::OcrHost,
-        types::{
-            LiteLLMOcrResponse, OcrConnection, OcrCredentialInputs, OcrDocument, OcrResponseFormat,
-            PreparedOcrRequest, ResolvedOcrCredentials,
-        },
-    },
-};
-
-const HEALTH_CHECK_PDF_DATA_URI: &str = "data:application/pdf;base64,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";
-
-/// Output of `validate_environment`: whatever a provider resolves up front
-/// (headers at minimum; Vertex also carries the project id).
-pub(crate) trait OcrEnvironment: Send + Sync {
-    fn headers(&self) -> &[(String, String)];
-}
-
-impl OcrEnvironment for Vec<(String, String)> {
-    fn headers(&self) -> &[(String, String)] {
-        self
-    }
-}
-
-#[derive(Clone, Copy)]
-pub(crate) struct OcrRequestContext<'a> {
-    pub client: &'a OcrClient,
-    pub connection: &'a OcrConnection,
-}
-
-#[derive(Clone, Copy)]
-pub(crate) struct OcrResponseContext<'a> {
-    pub client: &'a OcrClient,
-    pub connection: &'a OcrConnection,
-    pub host: &'a OcrHost,
-    pub request_format: OcrResponseFormat,
-    pub url: &'a str,
-    pub headers: &'a [(String, String)],
-}
-
-pub(crate) trait BaseOcrConfig: Send + Sync + Sized + 'static {
-    type OcrParams: Send + Sync;
-    type ProviderRequest: Serialize + Send;
-    type Environment: OcrEnvironment;
-
-    fn get_supported_ocr_params(&self, _model: &str) -> &'static [&'static str] {
-        &[]
-    }
-
-    fn get_api_key_env_var(&self) -> Option<&'static str> {
-        None
-    }
-
-    fn resolve_connection_params(&self, inputs: OcrCredentialInputs) -> ResolvedOcrCredentials {
-        ResolvedOcrCredentials {
-            api_key: inputs
-                .dynamic_api_key
-                .filter(|value| !value.value().is_empty())
-                .or(inputs.api_key),
-            api_base: inputs
-                .dynamic_api_base
-                .filter(|value| !value.value().is_empty())
-                .or(inputs.api_base),
-        }
-    }
-
-    fn get_health_check_document(&self) -> OcrDocument {
-        OcrDocument::DocumentUrl {
-            document_url: HEALTH_CHECK_PDF_DATA_URI.into(),
-            extra_fields: Default::default(),
-        }
-    }
-
-    fn map_ocr_params(
-        &self,
-        non_default_params: &CallArguments,
-        model: &str,
-    ) -> Result<Self::OcrParams, crate::ocr::Error>;
-
-    fn validate_environment(
-        &self,
-        request: &PreparedOcrRequest,
-        client: &OcrClient,
-    ) -> impl Future<Output = Result<Self::Environment, crate::ocr::Error>> + Send;
-
-    fn get_complete_url(
-        &self,
-        request: &PreparedOcrRequest,
-        optional_params: &Self::OcrParams,
-        environment: &Self::Environment,
-    ) -> Result<String, crate::ocr::Error>;
-
-    fn transform_ocr_request(
-        &self,
-        model: &str,
-        document: OcrDocument,
-        optional_params: &Self::OcrParams,
-        headers: &[(String, String)],
-    ) -> Result<Self::ProviderRequest, crate::ocr::Error>;
-
-    fn async_transform_ocr_request(
-        &self,
-        model: &str,
-        document: OcrDocument,
-        optional_params: &Self::OcrParams,
-        headers: &[(String, String)],
-        _context: OcrRequestContext<'_>,
-    ) -> impl Future<Output = Result<Self::ProviderRequest, crate::ocr::Error>> + Send {
-        async move { self.transform_ocr_request(model, document, optional_params, headers) }
-    }
-
-    fn transform_ocr_response(
-        &self,
-        model: &str,
-        raw_response: &[u8],
-        request_format: OcrResponseFormat,
-    ) -> Result<LiteLLMOcrResponse, crate::ocr::Error>;
-
-    fn async_transform_ocr_response(
-        &self,
-        model: &str,
-        raw_response: reqwest::Response,
-        context: OcrResponseContext<'_>,
-    ) -> impl Future<Output = Result<LiteLLMOcrResponse, crate::ocr::Error>> + Send {
-        async move {
-            let bytes = crate::ocr::client::read_response_bytes(
-                raw_response,
-                context.connection.max_response_bytes,
-            )
-            .await?;
-            crate::ocr::handler::emit_response_received(context.host, &bytes).await?;
-            self.transform_ocr_response(model, &bytes, context.request_format)
-        }
-    }
-
-    fn get_error_class(
-        &self,
-        error_message: String,
-        status_code: u16,
-        headers: Vec<(String, String)>,
-    ) -> crate::ocr::Error {
-        crate::ocr::Error::Provider {
-            status: status_code,
-            body: error_message,
-            headers,
-        }
-    }
-
-    /// Provider-specific check applied to the composed body, both before and
-    /// after guardrail hooks. Defaults to accepting any body.
-    fn validate_request_body(&self, _body: &Value) -> Result<(), crate::ocr::Error> {
-        Ok(())
-    }
-
-    /// Rust counterpart of `BaseLLMHTTPHandler._async_prepare_ocr_request`:
-    /// map params, validate environment, build URL, transform, compose body.
-    fn prepare_request(
-        &self,
-        request: &PreparedOcrRequest,
-        client: &OcrClient,
-    ) -> impl Future<Output = Result<reqwest::Request, crate::ocr::Error>> + Send {
-        async move {
-            let params = self.map_ocr_params(&request.optional_params, &request.model)?;
-            let environment = self.validate_environment(request, client).await?;
-            let url = self.get_complete_url(request, &params, &environment)?;
-            let headers = environment.headers();
-            let body = self
-                .async_transform_ocr_request(
-                    &request.model,
-                    request.document.clone(),
-                    &params,
-                    headers,
-                    OcrRequestContext {
-                        client,
-                        connection: &request.connection,
-                    },
-                )
-                .await?;
-            crate::ocr::prepare::transform_request_body(
-                client,
-                request,
-                &url,
-                headers,
-                body,
-                |body| self.validate_request_body(body),
-            )
-            .await
-        }
-    }
-}
-
-pub(crate) fn decode_and_normalize_response<T: DeserializeOwned>(
-    model: &str,
-    raw_response: &[u8],
-    request_format: OcrResponseFormat,
-    normalize: impl FnOnce(&str, T) -> Result<LiteLLMOcrResponse, crate::ocr::Error>,
-) -> Result<LiteLLMOcrResponse, crate::ocr::Error> {
-    let decoded = crate::ocr::json::decode_response(
-        raw_response,
-        request_format == OcrResponseFormat::Native,
-    )?;
-    Ok(LiteLLMOcrResponse {
-        provider_native_response: decoded.native,
-        ..normalize(model, decoded.data)?
-    })
-}

litellm-rust/crates/core/src/llms/cohere/mod.rs

@@ -1 +0,0 @@
-pub(crate) mod ocr;

litellm-rust/crates/core/src/llms/cohere/ocr/mod.rs

@@ -1,3 +0,0 @@
-pub(crate) mod transformation;
-
-pub(crate) use transformation::{CohereOptions, validate_document};

litellm-rust/crates/core/src/llms/mistral/mod.rs

@@ -1 +0,0 @@
-pub(crate) mod ocr;

litellm-rust/crates/core/src/llms/mistral/ocr/mod.rs

@@ -1 +0,0 @@
-pub(crate) mod transformation;

litellm-rust/crates/core/src/llms/mod.rs

@@ -1,8 +0,0 @@
-pub mod anthropic;
-pub mod azure_ai;
-pub mod base_llm;
-pub(crate) mod cohere;
-pub(crate) mod mistral;
-pub mod openai;
-pub(crate) mod reducto;
-pub(crate) mod vertex_ai;

litellm-rust/crates/core/src/llms/reducto/mod.rs

@@ -1 +0,0 @@
-pub(crate) mod ocr;

litellm-rust/crates/core/src/llms/reducto/ocr/mod.rs

@@ -1 +0,0 @@
-pub(crate) mod transformation;

litellm-rust/crates/core/src/llms/vertex_ai/mod.rs

@@ -1 +0,0 @@
-pub(crate) mod ocr;

litellm-rust/crates/core/src/llms/vertex_ai/ocr/mod.rs

@@ -1,3 +0,0 @@
-pub(crate) mod common_utils;
-pub(crate) mod deepseek_transformation;
-pub(crate) mod transformation;

litellm-rust/crates/core/src/llms/vertex_ai/ocr/transformation.rs

@@ -1,416 +0,0 @@
-use litellm_auth_gcp::{self as vertex, VertexConfig};
-use serde_json::Value;
-
-use super::common_utils::validate_destination;
-use crate::{
-    call_arguments::CallArguments,
-    llms::{
-        base_llm::ocr::transformation::{BaseOcrConfig, OcrEnvironment, OcrRequestContext},
-        mistral::ocr::transformation::{MistralOcrConfig, MistralOcrRequest},
-    },
-    ocr::{
-        OcrClient,
-        document::{inline_remote_document, validate_inline_document},
-        prepare::credential_env,
-        types::{LiteLLMOcrResponse, OcrConnection, OcrDocument, PreparedOcrRequest},
-    },
-    params::OpaqueParams,
-    url_utils::ApiUrl,
-};
-
-const DEFAULT_LOCATION: &str = "us-central1";
-
-#[derive(Clone, Debug, Default)]
-pub(crate) struct VertexAiOcrConfig;
-
-impl BaseOcrConfig for VertexAiOcrConfig {
-    type OcrParams = OpaqueParams;
-    type ProviderRequest = MistralOcrRequest;
-    type Environment = vertex::VertexEnvironment;
-
-    fn get_supported_ocr_params(&self, model: &str) -> &'static [&'static str] {
-        MistralOcrConfig.get_supported_ocr_params(model)
-    }
-
-    fn get_api_key_env_var(&self) -> Option<&'static str> {
-        Some("VERTEX_AI_API_KEY")
-    }
-
-    fn map_ocr_params(
-        &self,
-        non_default_params: &CallArguments,
-        model: &str,
-    ) -> Result<OpaqueParams, crate::ocr::Error> {
-        MistralOcrConfig.map_ocr_params(non_default_params, model)
-    }
-
-    async fn validate_environment(
-        &self,
-        request: &PreparedOcrRequest,
-        client: &OcrClient,
-    ) -> Result<Self::Environment, crate::ocr::Error> {
-        let config = VertexConfig::from_sourced_optional_params(
-            &request.optional_params,
-            &request.input_sources,
-        )?;
-        self.resolve_environment(&request.connection, &config, client)
-            .await
-    }
-
-    fn get_complete_url(
-        &self,
-        request: &PreparedOcrRequest,
-        _optional_params: &Self::OcrParams,
-        environment: &Self::Environment,
-    ) -> Result<String, crate::ocr::Error> {
-        let config = VertexConfig::from_sourced_optional_params(
-            &request.optional_params,
-            &request.input_sources,
-        )?;
-        let location = vertex::get_vertex_ai_location(&config, &credential_env)
-            .unwrap_or_else(|| DEFAULT_LOCATION.to_string());
-        self.build_ocr_url(
-            request.connection.api_base.as_deref(),
-            &environment.project_id,
-            &location,
-            &request.model,
-        )
-    }
-
-    fn transform_ocr_request(
-        &self,
-        model: &str,
-        document: OcrDocument,
-        optional_params: &OpaqueParams,
-        headers: &[(String, String)],
-    ) -> Result<MistralOcrRequest, crate::ocr::Error> {
-        MistralOcrConfig.transform_ocr_request(model, document, optional_params, headers)
-    }
-
-    async fn async_transform_ocr_request(
-        &self,
-        model: &str,
-        document: OcrDocument,
-        optional_params: &OpaqueParams,
-        headers: &[(String, String)],
-        context: OcrRequestContext<'_>,
-    ) -> Result<MistralOcrRequest, crate::ocr::Error> {
-        let document = inline_remote_document(
-            context.client.document_fetcher(),
-            document,
-            context.connection,
-        )
-        .await?;
-        self.transform_ocr_request(model, document, optional_params, headers)
-    }
-
-    fn transform_ocr_response(
-        &self,
-        model: &str,
-        raw_response: &[u8],
-        request_format: crate::ocr::types::OcrResponseFormat,
-    ) -> Result<LiteLLMOcrResponse, crate::ocr::Error> {
-        MistralOcrConfig.transform_ocr_response(model, raw_response, request_format)
-    }
-
-    fn validate_request_body(&self, body: &Value) -> Result<(), crate::ocr::Error> {
-        validate_inline_document(&crate::ocr::prepare::body_document(body)?)
-    }
-}
-
-impl OcrEnvironment for vertex::VertexEnvironment {
-    fn headers(&self) -> &[(String, String)] {
-        &self.headers
-    }
-}
-
-impl VertexAiOcrConfig {
-    async fn resolve_environment(
-        &self,
-        connection: &OcrConnection,
-        config: &VertexConfig,
-        client: &OcrClient,
-    ) -> Result<vertex::VertexEnvironment, crate::ocr::Error> {
-        validate_destination(connection)?;
-        client
-            .vertex_auth()
-            .validate_environment(
-                connection.extra_headers.clone(),
-                connection.api_key.as_deref(),
-                config,
-                &credential_env,
-            )
-            .await
-            .map_err(crate::ocr::Error::from)
-    }
-
-    fn build_ocr_url(
-        &self,
-        api_base: Option<&str>,
-        project: &str,
-        location: &str,
-        model: &str,
-    ) -> Result<String, crate::ocr::Error> {
-        validate_location(location)?;
-        let default_base = format!("https://{location}-aiplatform.googleapis.com");
-        let base = api_base
-            .map(str::trim)
-            .filter(|base| !base.is_empty())
-            .unwrap_or(&default_base);
-        let prediction = format!("{model}:rawPredict");
-        ApiUrl::parse(base)
-            .and_then(|url| {
-                url.complete_path(&[
-                    "v1",
-                    "projects",
-                    project,
-                    "locations",
-                    location,
-                    "publishers",
-                    "mistralai",
-                    "models",
-                    &prediction,
-                ])
-            })
-            .map(|url| url.into_string())
-            .map_err(|_| crate::ocr::Error::RequestField {
-                path: "api_base".into(),
-            })
-    }
-}
-
-fn validate_location(location: &str) -> Result<(), crate::ocr::Error> {
-    let valid = !location.is_empty()
-        && location
-            .bytes()
-            .all(|value| value.is_ascii_lowercase() || value.is_ascii_digit() || value == b'-')
-        && location
-            .as_bytes()
-            .first()
-            .is_some_and(u8::is_ascii_alphanumeric)
-        && location
-            .as_bytes()
-            .last()
-            .is_some_and(u8::is_ascii_alphanumeric);
-    if valid {
-        return Ok(());
-    }
-    Err(crate::ocr::Error::RequestField {
-        path: "vertex_location".into(),
-    })
-}
-
-#[cfg(test)]
-mod tests {
-    use rstest::rstest;
-
-    use super::VertexAiOcrConfig;
-
-    #[test]
-    fn endpoint_uses_location_project_and_model() {
-        assert_eq!(
-            VertexAiOcrConfig
-                .build_ocr_url(None, "proj-1", "europe-west4", "mistral-ocr-maas")
-                .unwrap(),
-            "https://europe-west4-aiplatform.googleapis.com/v1/projects/proj-1/locations/europe-west4/publishers/mistralai/models/mistral-ocr-maas:rawPredict"
-        );
-    }
-
-    #[test]
-    fn endpoint_rejects_invalid_location() {
-        assert!(
-            VertexAiOcrConfig
-                .build_ocr_url(None, "proj-1", "attacker.example/path", "model")
-                .is_err()
-        );
-    }
-
-    use litellm_auth::InputSource;
-    use serde_json::{Value, json};
-
-    use crate::ocr::test_support::{MockResponse, mock_server, perform_ocr, wire_request};
-
-    fn request_body(request: &str) -> Value {
-        serde_json::from_str(request.split_once("\r\n\r\n").unwrap().1).unwrap()
-    }
-
-    #[tokio::test]
-    async fn facade_executes_vertex_mistral_with_resolved_project_and_location() {
-        let (base, seen, server) = mock_server(vec![MockResponse::json(json!({
-            "pages":[{"index":0,"markdown":"hello"}],
-            "usage_info":{"pages_processed":1}
-        }))])
-        .await;
-        let request = wire_request(
-            "vertex_ai/mistral-ocr-maas",
-            &base,
-            json!({
-                "vertex_project":"project-1",
-                "vertex_location":"europe-west4",
-                "extract_footer":true
-            }),
-        );
-
-        let response = perform_ocr(request).await.unwrap();
-        server.await.unwrap();
-        assert_eq!(response.pages[0].markdown, "hello");
-        let requests = seen.lock().unwrap();
-        assert_eq!(requests.len(), 1);
-        assert!(requests[0].starts_with(
-            "POST /v1/projects/project-1/locations/europe-west4/publishers/mistralai/models/mistral-ocr-maas:rawPredict "
-        ));
-        assert!(
-            requests[0]
-                .to_ascii_lowercase()
-                .contains("authorization: bearer test-key")
-        );
-        assert_eq!(
-            request_body(&requests[0]),
-            json!({
-                "model":"mistral-ocr-maas",
-                "document":{"type":"document_url","document_url":"data:application/pdf;base64,YWJj"},
-                "extract_footer":true
-            })
-        );
-    }
-
-    #[tokio::test]
-    async fn supplied_authorization_is_forwarded_without_a_static_token() {
-        let (base, seen, server) = mock_server(vec![MockResponse::json(json!({"pages":[]}))]).await;
-        let mut request = wire_request(
-            "vertex_ai/model",
-            &base,
-            json!({"vertex_project":"project-1"}),
-        );
-        request.credentials.api_key = None;
-        request.transport.extra_headers = vec![("authorization".into(), "Bearer supplied".into())];
-
-        perform_ocr(request).await.unwrap();
-        server.await.unwrap();
-        assert!(
-            seen.lock().unwrap()[0]
-                .to_ascii_lowercase()
-                .contains("authorization: bearer supplied")
-        );
-    }
-
-    #[tokio::test]
-    async fn invalid_credentials_fail_before_provider_http() {
-        let request = wire_request(
-            "vertex_ai/model",
-            "http://127.0.0.1:1",
-            json!({"vertex_credentials": true}),
-        );
-        let error = perform_ocr(request).await.unwrap_err();
-        assert!(error.to_string().contains("vertex_credentials"));
-    }
-
-    #[tokio::test]
-    async fn request_controlled_api_base_is_rejected_before_vertex_auth() {
-        let mut request = wire_request(
-            "vertex_ai/mistral-ocr-maas",
-            "https://caller.example",
-            json!({"vertex_project":"project-1"}),
-        );
-        request.credentials.api_base = Some(litellm_auth::Sourced::new(
-            "https://caller.example".into(),
-            InputSource::Request,
-        ));
-
-        let error = perform_ocr(request).await.unwrap_err();
-        assert!(
-            error
-                .to_string()
-                .contains("request-controlled Vertex AI endpoint")
-        );
-    }
-
-    #[rstest]
-    #[case::mistral(false)]
-    #[case::vertex(true)]
-    #[tokio::test]
-    async fn configs_build_complete_requests_and_share_mistral_normalization(
-        #[case] use_vertex: bool,
-    ) {
-        use std::time::Duration;
-
-        use crate::{
-            llms::{
-                base_llm::ocr::transformation::BaseOcrConfig,
-                mistral::ocr::transformation::MistralOcrConfig,
-                vertex_ai::ocr::transformation::VertexAiOcrConfig,
-            },
-            ocr::test_support::ocr_client,
-        };
-
-        let client = ocr_client();
-        let options = json!({
-            "pages": [0, 2],
-            "include_image_base64": true,
-            "vertex_project": "project-1",
-            "vertex_location": "us-central1",
-            "unknown": "preserved"
-        });
-        let direct = wire_request(
-            "mistral/mistral-ocr-maas",
-            "https://mistral.test",
-            options.clone(),
-        );
-        let vertex = wire_request("vertex_ai/mistral-ocr-maas", "https://vertex.test", options);
-        let direct = crate::ocr::prepare::prepare_request_for_test(
-            crate::ocr::test_support::resolved_request(direct),
-        );
-        let vertex = crate::ocr::prepare::prepare_request_for_test(
-            crate::ocr::test_support::resolved_request(vertex),
-        );
-        let direct_http = MistralOcrConfig
-            .prepare_request(&direct, &client)
-            .await
-            .unwrap();
-        let vertex_http = VertexAiOcrConfig
-            .prepare_request(&vertex, &client)
-            .await
-            .unwrap();
-        assert_eq!(direct_http.url().as_str(), "https://mistral.test/v1/ocr");
-        assert_eq!(
-            vertex_http.url().as_str(),
-            "https://vertex.test/v1/projects/project-1/locations/us-central1/publishers/mistralai/models/mistral-ocr-maas:rawPredict"
-        );
-        let http = if use_vertex {
-            &vertex_http
-        } else {
-            &direct_http
-        };
-        assert_eq!(http.method(), reqwest::Method::POST);
-        assert_eq!(http.headers()["authorization"], "Bearer test-key");
-        assert_eq!(http.headers()["content-type"], "application/json");
-        assert_eq!(http.timeout(), Some(&Duration::from_secs(2)));
-        let body: Value = serde_json::from_slice(http.body().unwrap().as_bytes().unwrap()).unwrap();
-        assert_eq!(
-            body,
-            json!({
-                "model": "mistral-ocr-maas",
-                "document": {"type": "document_url", "document_url": "data:application/pdf;base64,YWJj"},
-                "pages": [0, 2],
-                "include_image_base64": true,
-                "unknown": "preserved"
-            })
-        );
-        let payload = serde_json::to_vec(
-            &json!({"pages": [{"index": 0, "markdown": "hello"}], "extra": "preserved"}),
-        )
-        .unwrap();
-        let direct_response = MistralOcrConfig
-            .transform_ocr_response(&direct.model, &payload, Default::default())
-            .unwrap()
-            .into_json();
-        let vertex_response = VertexAiOcrConfig
-            .transform_ocr_response(&vertex.model, &payload, Default::default())
-            .unwrap()
-            .into_json();
-        assert_eq!(direct_response, vertex_response);
-        assert_eq!(direct_response["model"], "mistral-ocr-maas");
-        assert_eq!(direct_response["object"], "ocr");
-        assert_eq!(direct_response["extra"], "preserved");
-    }
-}

litellm-rust/crates/core/src/machine/mod.rs

@@ -37,7 +37,7 @@ struct PendingOp<R: Route> {
 
 /// The provider side of the machine: how the in-flight call reaches its host.
 pub struct HostChannel<R: Route> {
-    ops: Option<mpsc::UnboundedSender<PendingOp<R>>>,
+    ops: mpsc::UnboundedSender<PendingOp<R>>,
 }
 
 impl<R: Route> Clone for HostChannel<R> {
@@ -48,24 +48,14 @@ impl<R: Route> Clone for HostChannel<R> {
     }
 }
 
-impl<R: Route> HostChannel<R> {
-    /// A channel with no host behind it: the wire request goes out unchanged, events go
-    /// nowhere, and route operations fail. For tests that prepare a request without
-    /// driving it.
-    #[cfg(test)]
-    pub(crate) fn detached() -> Self {
-        Self { ops: None }
-    }
-}
-
 impl<R: Route> HostChannel<R>
 where
     R::Error: From<MachineFault>,
 {
     async fn invoke(&self, op: HostOp<R>) -> Result<HostResult<R>, R::Error> {
-        let ops = self.ops.as_ref().ok_or(MachineFault::Abandoned)?;
         let (reply, answer) = oneshot::channel();
-        ops.send(PendingOp { op, reply })
+        self.ops
+            .send(PendingOp { op, reply })
             .map_err(|_| MachineFault::Abandoned)?;
         answer.await.map_err(|_| MachineFault::Abandoned.into())
     }
@@ -82,9 +72,6 @@ where
         wire: WireRequest,
         context: RequestContext,
     ) -> Result<WireRequest, R::Error> {
-        if self.ops.is_none() {
-            return Ok(wire);
-        }
         let op = HostOp::BeforeSend {
             wire: Box::new(wire),
             context: Box::new(context),
@@ -96,9 +83,6 @@ where
     }
 
     pub async fn emit(&self, event: CallEvent) -> Result<(), R::Error> {
-        if self.ops.is_none() {
-            return Ok(());
-        }
         match self.invoke(HostOp::Emit(event)).await? {
             HostResult::Emitted => Ok(()),
             _ => Err(MachineFault::Mismatch.into()),
@@ -128,7 +112,7 @@ where
         Self {
             execution: Execution::Unstarted(Box::new(execute)),
             ops,
-            channel: HostChannel { ops: Some(ops_tx) },
+            channel: HostChannel { ops: ops_tx },
             reply: None,
         }
     }

litellm-rust/crates/core/src/messages/common_utils.rs

@@ -1,13 +1,15 @@
-use litellm_providers::{
+pub(super) use litellm_llms::custom_httpx::http_handler::{
+    has_bearer_auth, has_header, truncate_error_body,
+};
+use litellm_llms::{
     anthropic::experimental_pass_through::messages::transformation::ANTHROPIC_MESSAGES_CONFIG,
     azure_ai::anthropic::messages_transformation::AZURE_ANTHROPIC_MESSAGES_CONFIG,
     base_llm::anthropic_messages::transformation::BaseAnthropicMessagesConfig,
+    custom_httpx::http_handler::string_headers as shared_string_headers,
 };
 use serde_json::{Map, Value};
 
 use super::Error;
-use crate::http_utils::string_headers as shared_string_headers;
-pub(super) use crate::http_utils::{has_bearer_auth, has_header, truncate_error_body};
 
 const HEADER_CONTEXT: &str = "messages";
 

litellm-rust/crates/core/src/messages/error.rs

@@ -1,3 +1,5 @@
+use litellm_llms::base_llm::chat::transformation::Error as LlmError;
+
 #[derive(Clone, Debug, PartialEq, Eq, thiserror::Error)]
 pub enum Error {
     #[error("invalid provider: {0}")]
@@ -13,33 +15,20 @@ pub enum Error {
     #[error(transparent)]
     Auth(#[from] litellm_auth::Error),
     #[error(transparent)]
-    Transport(#[from] crate::transport::Error),
+    Transport(#[from] litellm_llms::custom_httpx::transport::Error),
     #[error(transparent)]
-    Headers(#[from] crate::http_utils::HeaderError),
-    #[error("stream framing failed: {0}")]
-    StreamFraming(String),
-    #[error("Anthropic SSE frame has no data")]
-    MissingStreamData,
-    #[error("Anthropic stream event is invalid: {0}")]
-    InvalidStreamEvent(String),
-    #[error("Bedrock event payload is invalid: {0}")]
-    InvalidBedrockPayload(String),
-    #[error("Bedrock event payload has invalid base64: {0}")]
-    InvalidBedrockBase64(String),
+    Headers(#[from] litellm_llms::custom_httpx::http_handler::HeaderError),
 }
 
-impl From<litellm_providers::messages::Error> for Error {
-    fn from(error: litellm_providers::messages::Error) -> Self {
+impl From<LlmError> for Error {
+    fn from(error: LlmError) -> Self {
         match error {
-            litellm_providers::messages::Error::MissingField(field) => Self::MissingField(field),
-            litellm_providers::messages::Error::InvalidRequest(message) => {
-                Self::InvalidRequest(message)
-            }
-            litellm_providers::messages::Error::InvalidResponse(message) => {
-                Self::InvalidResponse(message)
-            }
-            litellm_providers::messages::Error::Unsupported(reason) => Self::Unsupported(reason),
-            litellm_providers::messages::Error::Auth(error) => Self::Auth(error),
+            error @ LlmError::InvalidType { .. } => Self::InvalidRequest(error.to_string()),
+            LlmError::MissingField(field) => Self::MissingField(field),
+            LlmError::InvalidRequest(message) => Self::InvalidRequest(message),
+            LlmError::InvalidResponse(message) => Self::InvalidResponse(message),
+            LlmError::Unsupported(reason) => Self::Unsupported(reason),
+            LlmError::Auth(error) => Self::Auth(error),
         }
     }
 }
@@ -58,14 +47,6 @@ impl Error {
     }
 
     pub fn is_response(&self) -> bool {
-        matches!(
-            self,
-            Self::InvalidResponse(_)
-                | Self::StreamFraming(_)
-                | Self::MissingStreamData
-                | Self::InvalidStreamEvent(_)
-                | Self::InvalidBedrockPayload(_)
-                | Self::InvalidBedrockBase64(_)
-        )
+        matches!(self, Self::InvalidResponse(_))
     }
 }

litellm-rust/crates/core/src/messages/handler.rs

@@ -1,11 +1,11 @@
+use litellm_llms::custom_httpx::http_handler::http_request;
+use litellm_types::llms::anthropic_messages::anthropic_response::AnthropicMessagesResponse;
+
 use super::{
-    Error,
-    client::http_client,
-    common_utils::truncate_error_body,
+    Error, client::http_client, common_utils::truncate_error_body,
     prepare::prepare_provider_request,
-    types::{AnthropicMessagesResponse, MessagesRequest},
 };
-use crate::{constants::ANTHROPIC_MESSAGES_PROVIDER, http_utils::http_request};
+use crate::{constants::ANTHROPIC_MESSAGES_PROVIDER, messages::types::MessagesRequest};
 
 pub(super) async fn execute_messages_provider_call(
     request: MessagesRequest<'_>,
@@ -19,21 +19,26 @@ pub(super) async fn execute_messages_provider_call(
         request_builder = request_builder.timeout(duration);
     }
 
-    let response = http_request(request_builder)
-        .await
-        .map_err(|err| Error::Transport(crate::transport::Error::Network(err.to_string())))?;
+    let response = http_request(request_builder).await.map_err(|err| {
+        Error::Transport(litellm_llms::custom_httpx::transport::Error::Network(
+            err.to_string(),
+        ))
+    })?;
 
     let status = response.status();
-    let text = response
-        .text()
-        .await
-        .map_err(|err| Error::Transport(crate::transport::Error::Network(err.to_string())))?;
+    let text = response.text().await.map_err(|err| {
+        Error::Transport(litellm_llms::custom_httpx::transport::Error::Network(
+            err.to_string(),
+        ))
+    })?;
 
     if !status.is_success() {
-        return Err(Error::Transport(crate::transport::Error::Http {
-            status: status.as_u16(),
-            body: truncate_error_body(&text),
-        }));
+        return Err(Error::Transport(
+            litellm_llms::custom_httpx::transport::Error::Http {
+                status: status.as_u16(),
+                body: truncate_error_body(&text),
+            },
+        ));
     }
 
     let response = serde_json::from_str(&text)
@@ -60,19 +65,24 @@ pub(super) async fn execute_messages_provider_stream(
         request_builder = request_builder.timeout(duration);
     }
 
-    let response = http_request(request_builder)
-        .await
-        .map_err(|err| Error::Transport(crate::transport::Error::Network(err.to_string())))?;
+    let response = http_request(request_builder).await.map_err(|err| {
+        Error::Transport(litellm_llms::custom_httpx::transport::Error::Network(
+            err.to_string(),
+        ))
+    })?;
     let status = response.status();
     if !status.is_success() {
-        let text = response
-            .text()
-            .await
-            .map_err(|err| Error::Transport(crate::transport::Error::Network(err.to_string())))?;
-        return Err(Error::Transport(crate::transport::Error::Http {
-            status: status.as_u16(),
-            body: truncate_error_body(&text),
-        }));
+        let text = response.text().await.map_err(|err| {
+            Error::Transport(litellm_llms::custom_httpx::transport::Error::Network(
+                err.to_string(),
+            ))
+        })?;
+        return Err(Error::Transport(
+            litellm_llms::custom_httpx::transport::Error::Http {
+                status: status.as_u16(),
+                body: truncate_error_body(&text),
+            },
+        ));
     }
     Ok(response)
 }

litellm-rust/crates/core/src/messages/mod.rs

@@ -8,14 +8,16 @@
 //! can splice the event stream to its own caller.
 
 mod error;
+pub mod types;
 pub use error::Error;
 mod client;
 mod common_utils;
 mod handler;
 mod prepare;
 use handler::{execute_messages_provider_call, execute_messages_provider_stream};
-pub use litellm_providers::messages::types;
-use types::{AnthropicMessagesResponse, MessagesRequest};
+use litellm_types::llms::anthropic_messages::anthropic_response::AnthropicMessagesResponse;
+
+use crate::messages::types::MessagesRequest;
 
 pub async fn messages(request: MessagesRequest<'_>) -> Result<AnthropicMessagesResponse, Error> {
     execute_messages_provider_call(request).await

litellm-rust/crates/core/src/messages/prepare.rs

@@ -1,4 +1,5 @@
-use litellm_providers::base_llm::anthropic_messages::transformation::{
+use litellm_core_utils::get_llm_provider_logic::{CustomLlmProvider, get_custom_llm_provider};
+use litellm_llms::base_llm::anthropic_messages::transformation::{
     BaseAnthropicMessagesConfig, MessagesAuthStrategy,
 };
 use serde_json::{Map, Value};
@@ -6,11 +7,8 @@ use serde_json::{Map, Value};
 use super::{
     Error,
     common_utils::{has_bearer_auth, has_header, messages_provider_config, string_headers},
-    types::{MessagesRequest, ProviderMessagesRequest},
-};
-use crate::litellm_core_utils::get_llm_provider_logic::{
-    CustomLlmProvider, get_custom_llm_provider,
 };
+use crate::messages::types::{MessagesRequest, ProviderMessagesRequest};
 
 pub(super) fn prepare_provider_request(
     request: MessagesRequest<'_>,

litellm-rust/crates/core/src/messages/tests.rs

@@ -12,8 +12,8 @@ use super::{
         has_bearer_auth, has_header, messages_provider_config, string_headers, truncate_error_body,
     },
     messages,
-    types::MessagesRequest,
 };
+use crate::messages::types::MessagesRequest;
 
 async fn read_http_request(socket: &mut TcpStream) -> String {
     let mut request = Vec::new();
@@ -82,7 +82,7 @@ fn string_headers_rejects_non_string_values() {
     let err = string_headers(Some(headers)).expect_err("non-string header rejected");
     assert_eq!(
         err,
-        Error::Headers(crate::http_utils::HeaderError {
+        Error::Headers(litellm_llms::custom_httpx::http_handler::HeaderError {
             context: "messages",
             name: "x-count".to_string(),
             actual: "number",
@@ -432,7 +432,7 @@ async fn messages_maps_provider_error_status_to_http_error() {
 
     assert!(matches!(
         err,
-        Error::Transport(crate::transport::Error::Http { status: 401, .. })
+        Error::Transport(litellm_llms::custom_httpx::transport::Error::Http { status: 401, .. })
     ));
 }
 

litellm-rust/crates/core/src/messages/types.rs

@@ -0,0 +1,24 @@
+use std::time::Duration;
+
+use litellm_llms::base_llm::anthropic_messages::transformation::BaseAnthropicMessagesConfig;
+use serde_json::{Map, Value};
+
+pub struct MessagesRequest<'a> {
+    pub model: &'a str,
+    pub body: Value,
+    pub api_key: Option<&'a str>,
+    pub api_base: Option<&'a str>,
+    pub custom_llm_provider: Option<&'a str>,
+    pub extra_headers: Option<Map<String, Value>>,
+    pub timeout: Option<Duration>,
+}
+
+pub struct ProviderMessagesRequest {
+    pub provider: String,
+    pub model: String,
+    pub config: &'static dyn BaseAnthropicMessagesConfig,
+    pub url: String,
+    pub body: Value,
+    pub upstream_headers: Vec<(String, String)>,
+    pub timeout: Option<Duration>,
+}

litellm-rust/crates/core/src/ocr/arguments.rs

@@ -1,5 +1,7 @@
+use litellm_core_utils::call_arguments::ArgumentSpec;
+use litellm_llms::base_llm::ocr::error::Error;
+
 use super::provider_config::{OcrConfigKind, resolve_provider_config};
-use crate::call_arguments::ArgumentSpec;
 
 const COMMON_OPTION_FIELDS: &[&str] = &["req_format", "extra_body", "max_response_bytes"];
 const AZURE_AUTH_OPTION_FIELDS: &[&str] = &[
@@ -29,7 +31,7 @@ pub fn is_supported_request(model: &str, custom_llm_provider: Option<&str>) -> b
 pub fn consumed_optional_param_names(
     model: &str,
     custom_llm_provider: Option<&str>,
-) -> Result<Vec<&'static str>, super::Error> {
+) -> Result<Vec<&'static str>, Error> {
     let (model, config) = resolve_provider_config(model, custom_llm_provider)?;
     let provider_fields = config.get_supported_ocr_params(&model);
     let auth_fields: &[&str] = match config {
@@ -61,7 +63,7 @@ pub(crate) fn is_secret_param(name: &str) -> bool {
 pub fn consumed_optional_params(
     model: &str,
     custom_llm_provider: Option<&str>,
-) -> Result<Vec<ArgumentSpec>, super::Error> {
+) -> Result<Vec<ArgumentSpec>, Error> {
     consumed_optional_param_names(model, custom_llm_provider).map(|names| {
         names
             .into_iter()

litellm-rust/crates/core/src/ocr/client.rs

@@ -1,176 +1,20 @@
-use std::{sync::OnceLock, time::Duration};
-
-use bytes::{Bytes, BytesMut};
-use litellm_auth_gcp::VertexAuth;
-use serde::de::DeserializeOwned;
-
-use super::{
-    json::{DecodedOcrResponse, decode_response},
-    types::{LiteLLMOcrRequest, LiteLLMOcrResponse},
+use litellm_llms::{
+    base_llm::ocr::{error::Error, transformation::LiteLLMOcrResponse},
+    custom_httpx::llm_http_handler::OcrClient,
 };
-use crate::{constants::OCR_CONNECT_TIMEOUT_SECS, media::MediaFetcher};
 
-#[derive(Clone)]
-pub struct OcrClient {
-    provider_http: reqwest::Client,
-    polling_http: reqwest::Client,
-    document_fetcher: MediaFetcher,
-    vertex_auth: VertexAuth,
+use crate::ocr::{
+    route::{LocalOcrHost, ocr_machine},
+    types::LiteLLMOcrRequest,
+};
+
+pub async fn perform(
+    client: &OcrClient,
+    request: LiteLLMOcrRequest,
+) -> Result<LiteLLMOcrResponse, Error> {
+    litellm_callbacks::run::run(ocr_machine(client.clone()), &LocalOcrHost::new(request)).await
 }
 
-impl OcrClient {
-    pub fn new(provider_http: reqwest::Client) -> Result<Self, crate::transport::Error> {
-        let document_fetcher = MediaFetcher::new().map_err(crate::transport::Error::from)?;
-        Ok(Self {
-            provider_http,
-            polling_http: no_redirect_http()?,
-            document_fetcher,
-            vertex_auth: VertexAuth::default(),
-        })
-    }
-
-    pub fn shared() -> Result<Self, crate::ocr::Error> {
-        shared_client()
-    }
-
-    pub async fn perform(
-        &self,
-        request: LiteLLMOcrRequest,
-    ) -> Result<LiteLLMOcrResponse, crate::ocr::Error> {
-        litellm_callbacks::run::run(
-            super::ocr_machine(self.clone()),
-            &super::LocalOcrHost::new(request),
-        )
-        .await
-    }
-
-    pub(crate) fn provider_http(&self) -> &reqwest::Client {
-        &self.provider_http
-    }
-
-    pub(crate) fn polling_http(&self) -> &reqwest::Client {
-        &self.polling_http
-    }
-
-    pub(crate) fn document_fetcher(&self) -> &MediaFetcher {
-        &self.document_fetcher
-    }
-
-    pub(crate) fn vertex_auth(&self) -> &VertexAuth {
-        &self.vertex_auth
-    }
-
-    #[cfg(test)]
-    pub(crate) fn for_test(provider_http: reqwest::Client, document_http: reqwest::Client) -> Self {
-        Self {
-            provider_http,
-            polling_http: no_redirect_http().expect("test polling client builds"),
-            document_fetcher: MediaFetcher::for_test(document_http),
-            vertex_auth: VertexAuth::default(),
-        }
-    }
-}
-
-fn no_redirect_http() -> Result<reqwest::Client, crate::transport::Error> {
-    reqwest::Client::builder()
-        .connect_timeout(Duration::from_secs(OCR_CONNECT_TIMEOUT_SECS))
-        .redirect(reqwest::redirect::Policy::none())
-        .build()
-        .map_err(crate::transport::Error::from)
-}
-
-pub(crate) fn shared_client() -> Result<OcrClient, crate::ocr::Error> {
-    static CLIENT: OnceLock<Result<OcrClient, crate::transport::Error>> = OnceLock::new();
-    let client = CLIENT
-        .get_or_init(|| {
-            reqwest::Client::builder()
-                .connect_timeout(Duration::from_secs(OCR_CONNECT_TIMEOUT_SECS))
-                .build()
-                .map_err(crate::transport::Error::from)
-                .and_then(OcrClient::new)
-        })
-        .clone()?;
-    Ok(client)
-}
-
-pub async fn ocr(request: LiteLLMOcrRequest) -> Result<LiteLLMOcrResponse, crate::ocr::Error> {
-    shared_client()?.perform(request).await
-}
-
-pub async fn read_json_response<T: DeserializeOwned>(
-    response: reqwest::Response,
-    native: bool,
-    max_response_bytes: usize,
-) -> Result<DecodedOcrResponse<T>, crate::ocr::Error> {
-    let bytes = read_response_bytes(response, max_response_bytes).await?;
-    decode_response(&bytes, native)
-}
-
-pub(crate) async fn read_response_bytes(
-    mut response: reqwest::Response,
-    limit: usize,
-) -> Result<Bytes, crate::ocr::Error> {
-    let status = response.status();
-    if status.is_success()
-        && response
-            .content_length()
-            .is_some_and(|length| length > limit as u64)
-    {
-        return Err(crate::ocr::Error::TooLarge { limit });
-    }
-    let mut bytes = BytesMut::new();
-    while let Some(chunk) = response.chunk().await.map_err(transport_error)? {
-        let remaining = limit.saturating_sub(bytes.len());
-        if status.is_success() && chunk.len() > remaining {
-            return Err(crate::ocr::Error::TooLarge { limit });
-        }
-        bytes.extend_from_slice(&chunk[..chunk.len().min(remaining)]);
-        if !status.is_success() && bytes.len() == limit {
-            break;
-        }
-    }
-    if !status.is_success() {
-        return Err(crate::transport::Error::Http {
-            status: status.as_u16(),
-            body: String::from_utf8_lossy(&bytes).into_owned(),
-        }
-        .into());
-    }
-    Ok(bytes.freeze())
-}
-
-pub(crate) fn transport_error(error: reqwest::Error) -> crate::ocr::Error {
-    if error.is_timeout() {
-        return crate::ocr::Error::Transport(crate::transport::Error::Http {
-            status: 408,
-            body: "OCR request timed out".into(),
-        });
-    }
-    crate::transport::Error::from(error).into()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[tokio::test]
-    async fn request_timeout_has_an_http_408_status() {
-        let listener = tokio::net::TcpListener::bind("127.0.0.1:0").await.unwrap();
-        let address = listener.local_addr().unwrap();
-        let server = tokio::spawn(async move {
-            let _connection = listener.accept().await.unwrap();
-            tokio::time::sleep(Duration::from_secs(1)).await;
-        });
-        let error = reqwest::Client::new()
-            .get(format!("http://{address}"))
-            .timeout(Duration::from_millis(10))
-            .send()
-            .await
-            .unwrap_err();
-        assert!(matches!(
-            transport_error(error),
-            crate::ocr::Error::Transport(crate::transport::Error::Http { status: 408, .. })
-        ));
-        server.abort();
-    }
+pub async fn ocr(request: LiteLLMOcrRequest) -> Result<LiteLLMOcrResponse, Error> {
+    perform(&OcrClient::shared()?, request).await
 }

litellm-rust/crates/core/src/ocr/document.rs

@@ -1,20 +1,14 @@
 use std::{collections::BTreeMap as Map, io::Read, path::Path};
 
 use base64::{Engine, engine::general_purpose::STANDARD};
-use data_url::{DataUrl, DataUrlError, forgiving_base64::DecodeError, mime::Mime};
-use reqwest::Url;
-
-use super::{
-    Error as OcrError, Error as OcrRequestError, Error as OcrResponseError,
-    types::{OcrConnection, OcrDocument, OcrDocumentInput},
-};
-use crate::{
-    constants::{OCR_INLINE_MAX_BYTES, OCR_MAX_FETCH_REDIRECTS},
-    media::{DownloadPolicy, Error as MediaError, MediaFetcher},
-    transport::Error as TransportError,
+use litellm_llms::base_llm::ocr::{
+    error::Error,
+    transformation::{OCR_INLINE_MAX_BYTES, OcrDocument},
 };
 
-pub fn prepare_document(input: OcrDocumentInput) -> Result<OcrDocument, super::Error> {
+use crate::ocr::types::OcrDocumentInput;
+
+pub fn prepare_document(input: OcrDocumentInput) -> Result<OcrDocument, Error> {
     match input {
         OcrDocumentInput::Document(document) => Ok(document),
         OcrDocumentInput::Path { path, mime_type } => {
@@ -29,23 +23,20 @@ pub fn prepare_document(input: OcrDocumentInput) -> Result<OcrDocument, super::E
             file_name.as_deref(),
             mime_type.as_deref(),
         )?),
-        OcrDocumentInput::HostReader { .. } => Err(super::Error::InvalidRequest(
+        OcrDocumentInput::HostReader { .. } => Err(Error::InvalidRequest(
             "OCR file reader was not read by the host".into(),
         )),
     }
 }
 
-pub fn read_path_document(
-    path: &Path,
-    mime_type: Option<&str>,
-) -> Result<OcrDocument, super::Error> {
+pub fn read_path_document(path: &Path, mime_type: Option<&str>) -> Result<OcrDocument, Error> {
     let mut bytes = Vec::new();
     std::fs::File::open(path)
         .and_then(|file| {
             file.take(OCR_INLINE_MAX_BYTES as u64 + 1)
                 .read_to_end(&mut bytes)
         })
-        .map_err(|source| super::Error::FileRead {
+        .map_err(|source| Error::FileRead {
             path: path.to_owned(),
             source: std::sync::Arc::new(source),
         })?;
@@ -57,17 +48,17 @@ pub fn encode_file_document(
     bytes: &[u8],
     file_name: Option<&str>,
     mime_type: Option<&str>,
-) -> Result<OcrDocument, OcrRequestError> {
+) -> Result<OcrDocument, Error> {
     if bytes.is_empty() {
-        return Err(OcrRequestError::EmptyFile);
+        return Err(Error::EmptyFile);
     }
     if bytes.len() > OCR_INLINE_MAX_BYTES {
-        return Err(OcrRequestError::InlineDocumentTooLarge);
+        return Err(Error::InlineDocumentTooLarge);
     }
     if let Some(value) = mime_type
         && !valid_mime_type(value)
     {
-        return Err(OcrRequestError::InvalidMimeType(value.into()));
+        return Err(Error::InvalidMimeType(value.into()));
     }
     let mime_type = mime_type
         .map(str::to_string)
@@ -117,105 +108,12 @@ pub fn mime_type_for_name(name: &str) -> &'static str {
     }
 }
 
-pub(crate) struct InlineDocument<'a>(DataUrl<'a>);
-
-impl<'a> InlineDocument<'a> {
-    pub(crate) fn parse(source: &'a str) -> Result<Option<Self>, OcrRequestError> {
-        match DataUrl::process(source) {
-            Ok(url) => Ok(Some(Self(url))),
-            Err(DataUrlError::NotADataUrl) => Ok(None),
-            Err(DataUrlError::NoComma) => Err(OcrRequestError::InvalidDataUri),
-        }
-    }
-
-    pub(crate) fn mime_type(&self) -> &Mime {
-        self.0.mime_type()
-    }
-
-    pub(crate) fn decode(&self, max_bytes: usize) -> Result<Vec<u8>, OcrRequestError> {
-        let mut body = Vec::new();
-        self.0
-            .decode(|bytes| {
-                if bytes.len() > max_bytes.saturating_sub(body.len()) {
-                    return Err(OcrRequestError::InlineDocumentTooLarge);
-                }
-                body.extend_from_slice(bytes);
-                Ok(())
-            })
-            .map_err(|error| match error {
-                DecodeError::InvalidBase64(_) => OcrRequestError::InvalidDataUri,
-                DecodeError::WriteError(error) => error,
-            })?;
-        Ok(body)
-    }
-}
-
-pub(crate) fn validate_inline_document(document: &OcrDocument) -> Result<(), OcrRequestError> {
-    let inline =
-        InlineDocument::parse(document.source())?.ok_or(OcrRequestError::InvalidDataUri)?;
-    inline.decode(crate::constants::OCR_INLINE_MAX_BYTES)?;
-    Ok(())
-}
-
-pub(crate) async fn inline_remote_document(
-    fetcher: &MediaFetcher,
-    document: OcrDocument,
-    connection: &OcrConnection,
-) -> Result<OcrDocument, OcrError> {
-    let source = document.source();
-    if !document.is_remote() {
-        validate_inline_document(&document)?;
-        return Ok(document);
-    }
-    let url = Url::parse(source).map_err(|_| OcrRequestError::RequestField {
-        path: "document URL".into(),
-    })?;
-    let downloaded = fetcher
-        .fetch(
-            url,
-            DownloadPolicy {
-                timeout: connection.timeout,
-                max_bytes: connection.max_download_bytes,
-                max_redirects: OCR_MAX_FETCH_REDIRECTS,
-            },
-        )
-        .await
-        .map_err(map_media_error)?;
-    let result = document.with_source(format!(
-        "data:{};base64,{}",
-        downloaded.content_type,
-        STANDARD.encode(downloaded.bytes)
-    ));
-    validate_inline_document(&result)?;
-    Ok(result)
-}
-
-fn map_media_error(error: MediaError) -> OcrError {
-    match error {
-        MediaError::BlockedUrl => OcrRequestError::BlockedDocumentUrl,
-        MediaError::DownloadDisabled => OcrRequestError::DownloadDisabled,
-        MediaError::DownloadTooLarge => OcrRequestError::DownloadTooLarge,
-        MediaError::TooManyRedirects => OcrRequestError::TooManyRedirects,
-        MediaError::MissingRedirectLocation => OcrResponseError::MissingRedirectLocation,
-        MediaError::InvalidRedirect => OcrResponseError::InvalidRedirect,
-        MediaError::Http(status) => TransportError::Http {
-            status,
-            body: "OCR document download failed".into(),
-        }
-        .into(),
-        MediaError::Timeout => TransportError::Http {
-            status: 408,
-            body: "OCR document download timed out".into(),
-        }
-        .into(),
-        MediaError::Transport(error) => error.into(),
-    }
-}
-
 #[cfg(test)]
 mod tests {
     use std::collections::BTreeMap as Map;
 
+    use litellm_llms::base_llm::ocr::document::InlineDocument;
+
     use super::*;
 
     fn document(source: &str) -> OcrDocument {
@@ -291,12 +189,12 @@ mod tests {
                 path: path.clone(),
                 mime_type: None,
             }),
-            Err(OcrRequestError::InlineDocumentTooLarge)
+            Err(Error::InlineDocumentTooLarge)
         ));
         std::fs::remove_dir_all(&dir).unwrap();
 
         let missing = dir.join("missing.pdf");
-        let Err(super::super::Error::FileRead { path, source, .. }) =
+        let Err(super::Error::FileRead { path, source, .. }) =
             prepare_document(OcrDocumentInput::Path {
                 path: missing.clone(),
                 mime_type: None,
@@ -327,7 +225,7 @@ mod tests {
         let bytes = vec![b'a'; OCR_INLINE_MAX_BYTES + 1];
         assert!(matches!(
             encode_file_document(&bytes, None, None),
-            Err(OcrRequestError::InlineDocumentTooLarge)
+            Err(Error::InlineDocumentTooLarge)
         ));
         let document = encode_file_document(&bytes[..OCR_INLINE_MAX_BYTES], None, None).unwrap();
         let inline = InlineDocument::parse(document.source()).unwrap().unwrap();
@@ -349,102 +247,4 @@ mod tests {
             assert!(encode_file_document(b"abc", None, Some(mime)).is_err());
         }
     }
-
-    #[test]
-    fn decodes_data_urls_and_limits_decoded_size() {
-        for (source, expected) in [
-            ("data:application/pdf;base64,YWJj", b"abc".as_slice()),
-            ("DATA:application/pdf;BASE64,YWI", b"ab".as_slice()),
-            ("data:,a%20b%00%FF", b"a b\0\xff".as_slice()),
-        ] {
-            let inline = InlineDocument::parse(source).unwrap().unwrap();
-            assert_eq!(inline.decode(expected.len()).unwrap(), expected);
-            assert!(matches!(
-                inline.decode(expected.len() - 1),
-                Err(OcrRequestError::InlineDocumentTooLarge)
-            ));
-        }
-    }
-
-    #[test]
-    fn preserves_mime_parameters_and_standard_default() {
-        let inline = InlineDocument::parse("data:application/pdf;version=1.7;base64,YQ==")
-            .unwrap()
-            .unwrap();
-        assert!(inline.mime_type().matches("application", "pdf"));
-        assert_eq!(inline.mime_type().get_parameter("version"), Some("1.7"));
-        let default = InlineDocument::parse("data:,a").unwrap().unwrap();
-        assert!(default.mime_type().matches("text", "plain"));
-        assert_eq!(
-            default.mime_type().get_parameter("charset"),
-            Some("US-ASCII")
-        );
-    }
-
-    #[test]
-    fn rejects_invalid_inline_documents() {
-        for source in [
-            "https://example.com/document.pdf",
-            "data:application/pdf;base64",
-            "data:application/pdf;base64,INVALID!",
-        ] {
-            assert!(validate_inline_document(&document(source)).is_err());
-        }
-    }
-
-    #[tokio::test]
-    async fn remote_conversion_preserves_kind_and_isolates_provider_credentials() {
-        use tokio::{
-            io::{AsyncReadExt, AsyncWriteExt},
-            net::TcpListener,
-        };
-
-        let listener = TcpListener::bind("127.0.0.1:0").await.unwrap();
-        let address = listener.local_addr().unwrap();
-        let server = tokio::spawn(async move {
-            let (mut socket, _) = listener.accept().await.unwrap();
-            let mut request = vec![0_u8; 2048];
-            let count = socket.read(&mut request).await.unwrap();
-            socket
-                .write_all(b"HTTP/1.1 200 OK\r\nContent-Type: image/png; charset=binary\r\nContent-Length: 3\r\nConnection: close\r\n\r\nabc")
-                .await
-                .unwrap();
-            String::from_utf8_lossy(&request[..count]).into_owned()
-        });
-        let mut provider_headers = reqwest::header::HeaderMap::new();
-        provider_headers.insert(
-            reqwest::header::AUTHORIZATION,
-            reqwest::header::HeaderValue::from_static("Bearer provider-secret"),
-        );
-        let provider_http = reqwest::Client::builder()
-            .default_headers(provider_headers)
-            .build()
-            .unwrap();
-        let document_http = reqwest::Client::builder()
-            .redirect(reqwest::redirect::Policy::none())
-            .build()
-            .unwrap();
-        let client = super::super::OcrClient::for_test(provider_http, document_http);
-        let converted = inline_remote_document(
-            client.document_fetcher(),
-            OcrDocument::ImageUrl {
-                image_url: format!("http://{address}/image"),
-                extra_fields: Map::from_iter([("detail".into(), Some("high".into()))]),
-            },
-            &OcrConnection::default(),
-        )
-        .await
-        .unwrap();
-        let request = server.await.unwrap();
-
-        assert_eq!(
-            converted,
-            OcrDocument::ImageUrl {
-                image_url: "data:image/png;base64,YWJj".into(),
-                extra_fields: Map::from_iter([("detail".into(), Some("high".into()))]),
-            }
-        );
-        assert!(!request.to_ascii_lowercase().contains("authorization"));
-        assert!(!request.contains("provider-secret"));
-    }
 }

litellm-rust/crates/core/src/ocr/handler.rs

@@ -1,117 +1,81 @@
-use litellm_callbacks::event::{CallEvent, RawResponse};
+use futures_util::future::BoxFuture;
+use litellm_callbacks::event::{CallEvent, Passthrough, RawResponse, RequestContext, WireRequest};
+use litellm_llms::{
+    base_llm::ocr::{
+        error::Error,
+        transformation::{LiteLLMOcrResponse, PreparedOcrRequest},
+    },
+    custom_httpx::llm_http_handler::{CallHooks, OcrClient},
+};
+use serde_json::Value;
 
 use super::{
-    OcrClient,
+    arguments::is_secret_param, prepare::prepare_request, provider_config::OcrConfigKind,
     route::OcrHost,
-    types::{LiteLLMOcrResponse, PreparedOcrRequest, ResolvedOcrRequest},
 };
-use crate::llms::base_llm::ocr::transformation::OcrResponseContext;
+use crate::ocr::types::ResolvedOcrRequest;
 
 pub(crate) async fn perform_ocr_request(
     client: &OcrClient,
     request: ResolvedOcrRequest,
     host: &OcrHost,
     caller_document: bool,
-) -> Result<LiteLLMOcrResponse, super::Error> {
+) -> Result<LiteLLMOcrResponse, Error> {
     request.response_format()?;
-    PreparedOcrCall::prepare(client.clone(), request, host, caller_document)
-        .await?
-        .execute()
-        .await
+    let config = request.config;
+    let request = prepare_request(request, caller_document);
+    let hooks = OcrCallHooks::new(host.clone(), &request, config);
+    config.ocr(client, &request, &hooks).await
 }
 
-pub(crate) struct PreparedOcrCall {
-    client: OcrClient,
-    request: PreparedOcrRequest,
-    http: reqwest::Request,
+/// Lets provider code reach the host mid-call, filling in the request context only the
+/// route knows.
+pub(crate) struct OcrCallHooks {
+    host: OcrHost,
+    model: String,
+    custom_llm_provider: &'static str,
+    optional_params: Value,
+    secret_fields: Vec<String>,
 }
 
-impl PreparedOcrCall {
-    pub(crate) async fn prepare(
-        client: OcrClient,
-        request: ResolvedOcrRequest,
-        host: &OcrHost,
-        caller_document: bool,
-    ) -> Result<Self, super::Error> {
-        let request = super::prepare::prepare_request(request, host.clone(), caller_document);
-        let http = request.config.prepare_request(&request, &client).await?;
-        Ok(Self {
-            client,
-            request,
-            http,
-        })
-    }
-
-    pub(crate) async fn execute(self) -> Result<LiteLLMOcrResponse, super::Error> {
-        let url = self.http.url().to_string();
-        let headers = request_headers(&self.http)?;
-        let response =
-            crate::http_utils::execute_http_request(self.client.provider_http(), self.http)
-                .await
-                .map_err(super::client::transport_error)?;
-        if !response.status().is_success() {
-            let headers = response
-                .headers()
-                .iter()
-                .filter_map(|(name, value)| {
-                    value
-                        .to_str()
-                        .ok()
-                        .map(|value| (name.to_string(), value.to_string()))
-                })
-                .collect();
-            return match super::client::read_response_bytes(
-                response,
-                self.request.connection.max_response_bytes,
-            )
-            .await
-            {
-                Err(super::Error::Transport(crate::transport::Error::Http { status, body })) => {
-                    Err(self.request.config.get_error_class(body, status, headers))
-                }
-                Err(error) => Err(error),
-                Ok(_) => unreachable!("non-success response produces an HTTP error"),
-            };
+impl OcrCallHooks {
+    pub(crate) fn new(host: OcrHost, request: &PreparedOcrRequest, config: OcrConfigKind) -> Self {
+        Self {
+            host,
+            model: request.model.clone(),
+            custom_llm_provider: config.provider().into(),
+            optional_params: Value::Object(request.optional_params.clone().into()),
+            secret_fields: request
+                .optional_params
+                .keys()
+                .filter(|name| is_secret_param(name))
+                .cloned()
+                .collect(),
         }
-        let model = &self.request.model;
-        let context = OcrResponseContext {
-            client: &self.client,
-            connection: &self.request.connection,
-            host: &self.request.host,
-            request_format: self.request.response_format()?,
-            url: &url,
-            headers: &headers,
-        };
-        self.request
-            .config
-            .async_transform_ocr_response(model, response, context)
-            .await
     }
 }
 
-fn request_headers(request: &reqwest::Request) -> Result<Vec<(String, String)>, super::Error> {
-    request
-        .headers()
-        .iter()
-        .map(|(name, value)| {
-            value
-                .to_str()
-                .map(|value| (name.to_string(), value.to_string()))
-                .map_err(|_| super::Error::RequestField {
-                    path: "headers".into(),
-                })
-        })
-        .collect()
-}
+impl CallHooks<Error> for OcrCallHooks {
+    fn before_send(
+        &self,
+        wire: WireRequest,
+        passthrough_fields: Passthrough,
+    ) -> BoxFuture<'_, Result<WireRequest, Error>> {
+        let context = RequestContext {
+            model: self.model.clone(),
+            custom_llm_provider: self.custom_llm_provider.into(),
+            optional_params: self.optional_params.clone(),
+            passthrough_fields,
+            secret_fields: self.secret_fields.clone(),
+        };
+        Box::pin(self.host.before_send(wire, context))
+    }
 
-pub(crate) async fn emit_response_received(
-    host: &OcrHost,
-    bytes: &[u8],
-) -> Result<(), super::Error> {
-    host.emit(CallEvent::ResponseReceived {
-        raw: RawResponse {
-            body: String::from_utf8_lossy(bytes).into_owned(),
-        },
-    })
-    .await
+    fn response_received<'a>(&'a self, body: &'a [u8]) -> BoxFuture<'a, Result<(), Error>> {
+        Box::pin(self.host.emit(CallEvent::ResponseReceived {
+            raw: RawResponse {
+                body: String::from_utf8_lossy(body).into_owned(),
+            },
+        }))
+    }
 }

litellm-rust/crates/core/src/ocr/json.rs

@@ -1,62 +0,0 @@
-use serde::de::{DeserializeOwned, IntoDeserializer};
-use serde_json::{Map, Value};
-
-#[derive(Debug)]
-pub struct DecodedOcrResponse<T> {
-    pub data: T,
-    pub native: Option<Map<String, Value>>,
-    pub text: String,
-}
-
-pub(crate) fn decode_request_value<T: DeserializeOwned>(
-    value: Value,
-    prefix: &str,
-) -> Result<T, crate::ocr::Error> {
-    serde_path_to_error::deserialize(value.into_deserializer()).map_err(|error| {
-        crate::ocr::Error::RequestField {
-            path: format!("{prefix}.{}", error.path()),
-        }
-    })
-}
-
-pub(crate) fn decode_response_value<T: DeserializeOwned>(
-    value: Value,
-    prefix: &str,
-) -> Result<T, crate::ocr::Error> {
-    serde_path_to_error::deserialize(value.into_deserializer()).map_err(|error| {
-        crate::ocr::Error::ResponseField {
-            path: format!("{prefix}.{}", error.path()),
-        }
-    })
-}
-
-pub(crate) fn decode_response<T: DeserializeOwned>(
-    bytes: &[u8],
-    native: bool,
-) -> Result<DecodedOcrResponse<T>, crate::ocr::Error> {
-    let mut deserializer = serde_json::Deserializer::from_slice(bytes);
-    let data = serde_path_to_error::deserialize(&mut deserializer).map_err(|error| {
-        crate::ocr::Error::ResponseField {
-            path: error.path().to_string(),
-        }
-    })?;
-    deserializer
-        .end()
-        .map_err(|_| crate::ocr::Error::ResponseField {
-            path: "response".into(),
-        })?;
-    let native = if native {
-        Some(
-            serde_json::from_slice(bytes).map_err(|_| crate::ocr::Error::ResponseField {
-                path: "response".into(),
-            })?,
-        )
-    } else {
-        None
-    };
-    Ok(DecodedOcrResponse {
-        data,
-        native,
-        text: String::from_utf8_lossy(bytes).into_owned(),
-    })
-}

litellm-rust/crates/core/src/ocr/mod.rs

@@ -1,29 +1,13 @@
-mod arguments;
+pub mod arguments;
 pub mod client;
-pub(crate) mod document;
-pub mod error;
-pub use error::Error;
+pub mod document;
 pub(crate) mod handler;
-pub(crate) mod json;
 pub(crate) mod prepare;
-mod provider_config;
+pub mod provider_config;
 pub mod route;
 pub mod types;
 pub mod wire;
 
-pub use arguments::{
-    consumed_optional_param_names, consumed_optional_params, is_supported_request,
-};
-pub use client::{OcrClient, ocr};
-pub use document::{encode_file_document, mime_type_for_name, read_path_document};
-pub use provider_config::{get_api_key_env_var, get_health_check_document};
-pub use route::{LocalOcrHost, Ocr, OcrHost, OcrMachine, OcrOp, OcrOpResult, ocr_machine};
-pub use types::{
-    LiteLLMOcrRequest, LiteLLMOcrResponse, OcrConnection, OcrConnectionInputs, OcrCredentialInputs,
-    OcrDocument, OcrDocumentInput, OcrFileContent, OcrPage, OcrPageDimensions, OcrPageImage,
-    OcrTransportConfig, OcrUsageInfo,
-};
-
 #[cfg(test)]
 #[path = "../../tests/azure_ai_ocr.rs"]
 mod azure_ai_tests;
@@ -31,6 +15,9 @@ mod azure_ai_tests;
 #[path = "../../tests/azure_document_intelligence_ocr.rs"]
 mod azure_document_intelligence_tests;
 #[cfg(test)]
+#[path = "../../tests/cohere_ocr.rs"]
+mod cohere_tests;
+#[cfg(test)]
 #[path = "../../tests/deepseek_ocr.rs"]
 mod deepseek_tests;
 #[cfg(test)]

litellm-rust/crates/core/src/ocr/prepare.rs

@@ -1,156 +1,20 @@
-use litellm_callbacks::event::{Passthrough, RequestContext, WireRequest};
-use serde::Serialize;
-use serde_json::{Map, Value};
+use litellm_auth::{InputSource, Sourced};
+use litellm_llms::base_llm::ocr::transformation::{
+    OcrConnection, OcrCredentialInputs, PreparedOcrRequest, credential_env,
+};
 
-use super::OcrClient;
-use super::route::OcrHost;
-use super::types::{OcrConnection, OcrDocument, PreparedOcrRequest, ResolvedOcrRequest};
-
-pub(crate) async fn transform_request_body<B>(
-    client: &OcrClient,
-    request: &PreparedOcrRequest,
-    url: &str,
-    headers: &[(String, String)],
-    body: B,
-    validate: impl Fn(&Value) -> Result<(), super::Error>,
-) -> Result<reqwest::Request, super::Error>
-where
-    B: Serialize,
-{
-    let composed = crate::call_arguments::compose_body(
-        &request.optional_params,
-        &body,
-        request.config.get_supported_ocr_params(&request.model),
-    )?;
-    validate(&composed)?;
-    let passthrough_fields = Passthrough::unchanged(&caller_inputs(request)?, &composed);
-    let changed = request
-        .host
-        .before_send(
-            wire_request(url, headers, composed),
-            request_context(request, passthrough_fields),
-        )
-        .await?;
-    if !changed.body.is_object() {
-        return Err(super::Error::RequestField {
-            path: "guardrail.body".into(),
-        });
-    }
-    validate(&changed.body)?;
-    build_http_request(client, request, url, &changed.headers, &changed.body)
-}
-
-fn wire_request(url: &str, headers: &[(String, String)], body: Value) -> WireRequest {
-    WireRequest {
-        url: url.into(),
-        headers: headers.to_vec(),
-        body,
-    }
-}
-
-fn caller_inputs(request: &PreparedOcrRequest) -> Result<Map<String, Value>, super::Error> {
-    let document = request
-        .caller_document
-        .then(|| serde_json::to_value(&request.document))
-        .transpose()
-        .map_err(|_| super::Error::RequestField {
-            path: "document".into(),
-        })?;
-    let params: Map<String, Value> = request.optional_params.clone().into();
-    Ok(params
-        .into_iter()
-        .chain(document.map(|document| ("document".to_string(), document)))
-        .collect())
-}
-
-fn request_context(
-    request: &PreparedOcrRequest,
-    passthrough_fields: Passthrough,
-) -> RequestContext {
-    RequestContext {
-        model: request.model.clone(),
-        custom_llm_provider: request.provider_name().into(),
-        optional_params: Value::Object(request.optional_params.clone().into()),
-        passthrough_fields,
-        secret_fields: request
-            .optional_params
-            .keys()
-            .filter(|name| super::arguments::is_secret_param(name))
-            .cloned()
-            .collect(),
-    }
-}
-
-pub(crate) fn build_http_request<B: Serialize>(
-    client: &OcrClient,
-    request: &PreparedOcrRequest,
-    url: &str,
-    headers: &[(String, String)],
-    body: &B,
-) -> Result<reqwest::Request, super::Error> {
-    let builder = client
-        .provider_http()
-        .post(url)
-        .json(body)
-        .timeout(request.connection.timeout);
-    crate::http_utils::with_headers(builder, headers, crate::http_utils::HeaderPolicy::All)
-        .build()
-        .map_err(crate::transport::Error::from)
-        .map_err(super::Error::from)
-}
-
-pub(crate) async fn guardrail_document(
-    request: &PreparedOcrRequest,
-    url: &str,
-    headers: &[(String, String)],
-) -> Result<(OcrDocument, Vec<(String, String)>), super::Error> {
-    let body = serde_json::to_value(&request.document).map_err(|_| super::Error::RequestField {
-        path: "document".into(),
-    })?;
-    let changed = request
-        .host
-        .before_send(
-            wire_request(url, headers, body),
-            request_context(request, Passthrough::default()),
-        )
-        .await?;
-    let document = super::json::decode_request_value(changed.body, "guardrail.document")?;
-    Ok((document, changed.headers))
-}
-
-pub(crate) fn body_document(body: &Value) -> Result<OcrDocument, super::Error> {
-    let document = body
-        .get("document")
-        .and_then(Value::as_object)
-        .ok_or_else(|| super::Error::RequestField {
-            path: "body.document".into(),
-        })?;
-    let source = document
-        .iter()
-        .filter(|(name, _)| matches!(name.as_str(), "type" | "image_url" | "document_url"))
-        .map(|(name, value)| (name.clone(), value.clone()))
-        .collect();
-    super::json::decode_request_value(Value::Object(source), "body.document")
-}
-
-pub(crate) fn credential_env(name: &str) -> Option<String> {
-    std::env::var(name).ok()
-}
+use super::provider_config::OcrProvider;
+use crate::ocr::types::{LiteLLMOcrRequest, ResolvedOcrRequest};
 
 pub(crate) fn prepare_request(
     request: ResolvedOcrRequest,
-    host: OcrHost,
     caller_document: bool,
 ) -> PreparedOcrRequest {
-    use litellm_auth::{InputSource, Sourced};
-
     let credentials = request.credentials.clone();
     let api_base_env = match request.config.provider() {
-        super::provider_config::OcrProvider::Mistral => Some("MISTRAL_API_BASE"),
-        super::provider_config::OcrProvider::AzureAi => Some("AZURE_AI_API_BASE"),
-        super::provider_config::OcrProvider::Cohere
-        | super::provider_config::OcrProvider::Reducto
-        | super::provider_config::OcrProvider::VertexAi => None,
+        OcrProvider::Mistral => Some("MISTRAL_API_BASE"),
+        OcrProvider::AzureAi => Some("AZURE_AI_API_BASE"),
+        OcrProvider::Cohere | OcrProvider::Reducto | OcrProvider::VertexAi => None,
     };
     let dynamic_api_key = credentials.dynamic_api_key.or_else(|| {
         credentials.api_key.clone().or_else(|| {
@@ -170,31 +34,41 @@ pub(crate) fn prepare_request(
     });
     let resolved = request
         .config
-        .resolve_connection_params(super::types::OcrCredentialInputs {
+        .resolve_connection_params(OcrCredentialInputs {
             dynamic_api_key,
             dynamic_api_base,
             ..credentials
         });
-    let transport = request.transport.clone();
-    PreparedOcrRequest::new(
-        request,
-        OcrConnection::new(resolved, transport),
-        host,
+    let LiteLLMOcrRequest {
+        model,
+        document,
+        transport,
+        optional_params,
+        input_sources,
+        azure_ad_token_provider,
+        ..
+    } = request;
+    PreparedOcrRequest {
+        model,
+        document,
+        connection: OcrConnection::new(resolved, transport),
         caller_document,
-    )
+        optional_params,
+        input_sources,
+        azure_ad_token_provider,
+    }
 }
 
 #[cfg(test)]
 pub(crate) fn prepare_request_for_test(request: ResolvedOcrRequest) -> PreparedOcrRequest {
-    prepare_request(request, OcrHost::detached(), true)
+    prepare_request(request, true)
 }
 
 #[cfg(test)]
 mod tests {
+    use litellm_core_utils::call_arguments::{CallArguments, compose_body, parse_options};
     use serde_json::json;
 
-    use crate::call_arguments::{CallArguments, compose_body, parse_options};
-
     #[derive(serde::Deserialize)]
     struct KnownParams {
         pages: Option<Vec<i64>>,

litellm-rust/crates/core/src/ocr/provider_config.rs

@@ -1,48 +1,66 @@
+use litellm_core_utils::get_llm_provider_logic::{CustomLlmProvider, get_custom_llm_provider};
+use litellm_llms::{
+    azure_ai::ocr::{
+        cohere_parse_transformation::AzureAICohereParseConfig,
+        document_intelligence::transformation::AzureDocumentIntelligenceOcrConfig,
+        transformation::AzureAiOcrConfig,
+    },
+    base_llm::ocr::{
+        error::Error,
+        transformation::{
+            BaseOcrConfig, LiteLLMOcrResponse, OcrCredentialInputs, OcrDocument,
+            PreparedOcrRequest, ResolvedOcrCredentials,
+        },
+    },
+    cohere::ocr::transformation::CohereParseConfig,
+    custom_httpx::llm_http_handler::{self, CallHooks, OcrClient},
+    mistral::ocr::transformation::MistralOcrConfig,
+    reducto::ocr::transformation::{ReductoParseLegacyConfig, ReductoParseV3Config},
+    vertex_ai::ocr::{
+        deepseek_transformation::VertexAIDeepSeekOCRConfig, transformation::VertexAiOcrConfig,
+    },
+};
 use strum::{EnumString, IntoStaticStr};
 
-use super::{
-    OcrClient,
-    types::{
-        LiteLLMOcrResponse, OcrCredentialInputs, OcrDocument, PreparedOcrRequest,
-        ResolvedOcrCredentials,
-    },
-};
-use crate::{
-    litellm_core_utils::get_llm_provider_logic::{CustomLlmProvider, get_custom_llm_provider},
-    llms::{
-        azure_ai::ocr::{
-            cohere_parse_transformation::AzureAICohereParseConfig,
-            document_intelligence::transformation::AzureDocumentIntelligenceOcrConfig,
-            transformation::AzureAiOcrConfig,
-        },
-        base_llm::ocr::transformation::{BaseOcrConfig, OcrResponseContext},
-        cohere::ocr::transformation::CohereParseConfig,
-        mistral::ocr::transformation::MistralOcrConfig,
-        reducto::ocr::transformation::{ReductoParseLegacyConfig, ReductoParseV3Config},
-        vertex_ai::ocr::{
-            deepseek_transformation::VertexAIDeepSeekOCRConfig, transformation::VertexAiOcrConfig,
-        },
-    },
-};
-
-macro_rules! dispatch_config {
-    ($config:expr, $method:ident($($argument:expr),* $(,)?)) => {
-        dispatch_config!(@arms $config, $method($($argument),*), )
-    };
-    ($config:expr, $method:ident($($argument:expr),* $(,)?).await) => {
-        dispatch_config!(@arms $config, $method($($argument),*), .await)
-    };
-    (@arms $config:expr, $method:ident($($argument:expr),*), $($suffix:tt)*) => {
-        match $config {
-            OcrConfigKind::Cohere => CohereParseConfig.$method($($argument),*)$($suffix)*,
-            OcrConfigKind::Mistral => MistralOcrConfig.$method($($argument),*)$($suffix)*,
-            OcrConfigKind::AzureAi => AzureAiOcrConfig.$method($($argument),*)$($suffix)*,
-            OcrConfigKind::AzureCohere => AzureAICohereParseConfig.$method($($argument),*)$($suffix)*,
-            OcrConfigKind::AzureDocumentIntelligence => AzureDocumentIntelligenceOcrConfig.$method($($argument),*)$($suffix)*,
-            OcrConfigKind::ReductoLegacy => ReductoParseLegacyConfig.$method($($argument),*)$($suffix)*,
-            OcrConfigKind::ReductoV3 => ReductoParseV3Config.$method($($argument),*)$($suffix)*,
-            OcrConfigKind::VertexAi => VertexAiOcrConfig.$method($($argument),*)$($suffix)*,
-            OcrConfigKind::VertexDeepSeek => VertexAIDeepSeekOCRConfig.$method($($argument),*)$($suffix)*,
+macro_rules! with_config {
+    ($kind:expr, $config:ident => $body:expr) => {
+        match $kind {
+            OcrConfigKind::Cohere => {
+                let $config = CohereParseConfig;
+                $body
+            }
+            OcrConfigKind::Mistral => {
+                let $config = MistralOcrConfig;
+                $body
+            }
+            OcrConfigKind::AzureAi => {
+                let $config = AzureAiOcrConfig;
+                $body
+            }
+            OcrConfigKind::AzureCohere => {
+                let $config = AzureAICohereParseConfig;
+                $body
+            }
+            OcrConfigKind::AzureDocumentIntelligence => {
+                let $config = AzureDocumentIntelligenceOcrConfig;
+                $body
+            }
+            OcrConfigKind::ReductoLegacy => {
+                let $config = ReductoParseLegacyConfig;
+                $body
+            }
+            OcrConfigKind::ReductoV3 => {
+                let $config = ReductoParseV3Config;
+                $body
+            }
+            OcrConfigKind::VertexAi => {
+                let $config = VertexAiOcrConfig;
+                $body
+            }
+            OcrConfigKind::VertexDeepSeek => {
+                let $config = VertexAIDeepSeekOCRConfig;
+                $body
+            }
         }
     };
 }
@@ -74,58 +92,38 @@ impl OcrConfigKind {
     }
 
     pub(crate) fn get_supported_ocr_params(self, model: &str) -> &'static [&'static str] {
-        dispatch_config!(self, get_supported_ocr_params(model))
+        with_config!(self, config => config.get_supported_ocr_params(model))
     }
 
     pub(crate) fn get_api_key_env_var(self) -> Option<&'static str> {
-        dispatch_config!(self, get_api_key_env_var())
+        with_config!(self, config => config.get_api_key_env_var())
     }
 
     pub(crate) fn get_health_check_document(self) -> OcrDocument {
-        dispatch_config!(self, get_health_check_document())
+        with_config!(self, config => config.get_health_check_document())
     }
 
     pub(crate) fn resolve_connection_params(
         self,
         inputs: OcrCredentialInputs,
     ) -> ResolvedOcrCredentials {
-        dispatch_config!(self, resolve_connection_params(inputs))
+        with_config!(self, config => config.resolve_connection_params(inputs))
     }
 
-    pub(crate) fn get_error_class(
+    pub(crate) async fn ocr(
         self,
-        message: String,
-        status: u16,
-        headers: Vec<(String, String)>,
-    ) -> super::Error {
-        dispatch_config!(self, get_error_class(message, status, headers))
-    }
-
-    pub(crate) async fn prepare_request(
-        self,
-        request: &PreparedOcrRequest,
         client: &OcrClient,
-    ) -> Result<reqwest::Request, super::Error> {
-        dispatch_config!(self, prepare_request(request, client).await)
-    }
-
-    pub(crate) async fn async_transform_ocr_response(
-        self,
-        model: &str,
-        raw_response: reqwest::Response,
-        context: OcrResponseContext<'_>,
-    ) -> Result<LiteLLMOcrResponse, super::Error> {
-        dispatch_config!(
-            self,
-            async_transform_ocr_response(model, raw_response, context).await
-        )
+        request: &PreparedOcrRequest,
+        hooks: &dyn CallHooks<Error>,
+    ) -> Result<LiteLLMOcrResponse, Error> {
+        with_config!(self, config => llm_http_handler::ocr(&config, client, request, hooks).await)
     }
 }
 
 pub fn get_api_key_env_var(
     model: &str,
     custom_llm_provider: Option<&str>,
-) -> Result<Option<&'static str>, super::Error> {
+) -> Result<Option<&'static str>, Error> {
     Ok(resolve_provider_config(model, custom_llm_provider)?
         .1
         .get_api_key_env_var())
@@ -134,7 +132,7 @@ pub fn get_api_key_env_var(
 pub fn get_health_check_document(
     model: &str,
     custom_llm_provider: Option<&str>,
-) -> Result<OcrDocument, super::Error> {
+) -> Result<OcrDocument, Error> {
     Ok(resolve_provider_config(model, custom_llm_provider)?
         .1
         .get_health_check_document())
@@ -153,7 +151,7 @@ pub(crate) enum OcrProvider {
 pub(crate) fn resolve_provider_config(
     model: &str,
     custom_llm_provider: Option<&str>,
-) -> Result<(String, OcrConfigKind), super::Error> {
+) -> Result<(String, OcrConfigKind), Error> {
     let provider =
         get_custom_llm_provider(model, custom_llm_provider).unwrap_or(CustomLlmProvider {
             model,
@@ -162,7 +160,7 @@ pub(crate) fn resolve_provider_config(
     let ocr_provider = provider
         .custom_llm_provider
         .parse::<OcrProvider>()
-        .map_err(|_| super::Error::InvalidProvider(provider.custom_llm_provider.to_string()))?;
+        .map_err(|_| Error::InvalidProvider(provider.custom_llm_provider.to_string()))?;
     let config = match ocr_provider {
         OcrProvider::Cohere => OcrConfigKind::Cohere,
         OcrProvider::Mistral => OcrConfigKind::Mistral,
@@ -196,6 +194,9 @@ fn is_document_intelligence_model(model: &str) -> bool {
 #[cfg(test)]
 mod tests {
     use litellm_auth::{InputSource, Sourced};
+    use litellm_llms::{
+        base_llm::ocr::document::InlineDocument, cohere::ocr::transformation::validate_document,
+    };
     use rstest::rstest;
 
     use super::*;
@@ -218,7 +219,7 @@ mod tests {
     fn invalid_provider_names_are_rejected(#[case] provider: &str) {
         assert!(matches!(
             resolve_provider_config("model", Some(provider)),
-            Err(crate::ocr::Error::InvalidProvider(value)) if value == provider
+            Err(Error::InvalidProvider(value)) if value == provider
         ));
     }
 
@@ -232,9 +233,7 @@ mod tests {
     fn pdf_health_check_documents_are_valid(#[case] model: &str) {
         let document = get_health_check_document(model, None).unwrap();
         assert!(matches!(document, OcrDocument::DocumentUrl { .. }));
-        let inline = crate::ocr::document::InlineDocument::parse(document.source())
-            .unwrap()
-            .unwrap();
+        let inline = InlineDocument::parse(document.source()).unwrap().unwrap();
         assert_eq!(inline.mime_type().to_string(), "application/pdf");
         assert!(inline.decode(4096).unwrap().starts_with(b"%PDF-"));
     }
@@ -244,10 +243,8 @@ mod tests {
     #[case("azure_ai/cohere-parse")]
     fn png_health_check_documents_are_valid(#[case] model: &str) {
         let document = get_health_check_document(model, None).unwrap();
-        crate::llms::cohere::ocr::validate_document(&document).unwrap();
-        let inline = crate::ocr::document::InlineDocument::parse(document.source())
-            .unwrap()
-            .unwrap();
+        validate_document(&document).unwrap();
+        let inline = InlineDocument::parse(document.source()).unwrap().unwrap();
         assert_eq!(inline.mime_type().to_string(), "image/png");
         assert!(
             inline
@@ -435,9 +432,7 @@ mod tests {
         #[case] provider: Option<&str>,
     ) {
         let error = resolve_provider_config(model, provider).unwrap_err();
-        assert!(
-            matches!(&error, crate::ocr::Error::InvalidProvider(provider) if provider == "not_a_provider")
-        );
+        assert!(matches!(&error, Error::InvalidProvider(provider) if provider == "not_a_provider"));
         assert_eq!(error.http_status_code(), Some(400));
     }
 }

litellm-rust/crates/core/src/ocr/route.rs

@@ -5,13 +5,16 @@ use litellm_callbacks::{
     event::{CallEvent, RequestContext, WireRequest},
     route::Route,
 };
-
-use super::{
-    Error, LiteLLMOcrRequest, LiteLLMOcrResponse, OcrClient,
-    handler::perform_ocr_request,
-    types::{OcrDocumentInput, OcrFileContent, ResolvedOcrRequest},
+use litellm_llms::{
+    base_llm::ocr::{error::Error, transformation::LiteLLMOcrResponse},
+    custom_httpx::llm_http_handler::OcrClient,
+};
+
+use super::handler::perform_ocr_request;
+use crate::{
+    machine::{HostChannel, HostTokenProvider, MachineFault, RouteMachine, TokenRoute},
+    ocr::types::{LiteLLMOcrRequest, OcrDocumentInput, OcrFileContent, ResolvedOcrRequest},
 };
-use crate::machine::{HostChannel, HostTokenProvider, MachineFault, RouteMachine, TokenRoute};
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum OcrOp {

litellm-rust/crates/core/src/ocr/types.rs

@@ -1,69 +1,17 @@
 use std::{collections::BTreeMap, path::PathBuf, time::Duration};
 
 use bytes::Bytes;
-use litellm_auth::{InputSource, Sourced, TokenProviderHandle};
-use serde::{Deserialize, Serialize};
+use litellm_auth::{InputSource, TokenProviderHandle};
+use litellm_core_utils::call_arguments::CallArguments;
+use litellm_llms::base_llm::ocr::{
+    error::Error,
+    transformation::{
+        OcrCredentialInputs, OcrDocument, OcrResponseFormat, OcrTransportConfig, response_format,
+    },
+};
 use serde_json::{Map, Value};
-use serde_with::serde_as;
 
 use super::provider_config::{OcrConfigKind, resolve_provider_config};
-use crate::{
-    call_arguments::CallArguments,
-    constants::OCR_HTTP_TIMEOUT_SECS,
-    serde_compat::{FiniteF64, LaxI64},
-};
-
-#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
-#[serde(tag = "type")]
-pub enum OcrDocument {
-    #[serde(rename = "document_url")]
-    DocumentUrl {
-        document_url: String,
-        #[serde(flatten)]
-        extra_fields: BTreeMap<String, Option<String>>,
-    },
-    #[serde(rename = "image_url")]
-    ImageUrl {
-        image_url: String,
-        #[serde(flatten)]
-        extra_fields: BTreeMap<String, Option<String>>,
-    },
-}
-
-impl OcrDocument {
-    pub(crate) fn source(&self) -> &str {
-        match self {
-            Self::DocumentUrl { document_url, .. } => document_url,
-            Self::ImageUrl { image_url, .. } => image_url,
-        }
-    }
-
-    pub(crate) fn is_remote(&self) -> bool {
-        let source = self.source();
-        source.starts_with("http://") || source.starts_with("https://")
-    }
-
-    pub(crate) fn with_source(self, source: String) -> Self {
-        match self {
-            Self::DocumentUrl { extra_fields, .. } => Self::DocumentUrl {
-                document_url: source,
-                extra_fields,
-            },
-            Self::ImageUrl { extra_fields, .. } => Self::ImageUrl {
-                image_url: source,
-                extra_fields,
-            },
-        }
-    }
-}
-
-impl TryFrom<Value> for OcrDocument {
-    type Error = super::Error;
-
-    fn try_from(value: Value) -> Result<Self, Self::Error> {
-        super::json::decode_request_value(value, "document")
-    }
-}
 
 #[derive(Clone, Debug, PartialEq)]
 pub enum OcrDocumentInput {
@@ -103,83 +51,6 @@ pub struct OcrFileContent {
     pub file_name: Option<String>,
 }
 
-#[derive(Clone, Copy, Debug, Default, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "lowercase")]
-pub enum OcrResponseFormat {
-    #[default]
-    Litellm,
-    Native,
-}
-
-#[derive(Clone, Default)]
-pub struct OcrCredentialInputs {
-    pub api_key: Option<Sourced<String>>,
-    pub dynamic_api_key: Option<Sourced<String>>,
-    pub api_base: Option<Sourced<String>>,
-    pub dynamic_api_base: Option<Sourced<String>>,
-}
-
-impl OcrCredentialInputs {
-    pub fn new(
-        api_key: Option<String>,
-        api_key_source: InputSource,
-        api_base: Option<String>,
-        api_base_source: InputSource,
-    ) -> Self {
-        Self {
-            api_key: nonblank(api_key).map(|value| Sourced::new(value, api_key_source)),
-            dynamic_api_key: None,
-            api_base: nonblank(api_base).map(|value| Sourced::new(value, api_base_source)),
-            dynamic_api_base: None,
-        }
-    }
-}
-
-#[derive(Clone)]
-pub struct OcrTransportConfig {
-    pub extra_headers: Vec<(String, String)>,
-    pub extra_headers_source: InputSource,
-    pub timeout: Duration,
-    pub max_download_bytes: u64,
-    pub max_response_bytes: usize,
-    pub poll_timeout: Duration,
-}
-
-impl Default for OcrTransportConfig {
-    fn default() -> Self {
-        Self {
-            extra_headers: Vec::new(),
-            extra_headers_source: InputSource::Deployment,
-            timeout: Duration::from_secs(OCR_HTTP_TIMEOUT_SECS),
-            max_download_bytes: crate::constants::OCR_DOWNLOAD_MAX_BYTES,
-            max_response_bytes: crate::constants::OCR_RESPONSE_MAX_BYTES,
-            poll_timeout: Duration::from_secs(crate::constants::OCR_POLL_TIMEOUT_SECS),
-        }
-    }
-}
-
-impl OcrTransportConfig {
-    pub fn with_overrides(
-        self,
-        extra_headers: Vec<(String, String)>,
-        extra_headers_source: InputSource,
-        timeout: Option<Duration>,
-    ) -> Self {
-        Self {
-            extra_headers,
-            extra_headers_source,
-            timeout: timeout.unwrap_or(self.timeout),
-            ..self
-        }
-    }
-}
-
-fn nonblank(value: Option<String>) -> Option<String> {
-    value
-        .map(|value| value.trim().to_string())
-        .filter(|value| !value.is_empty())
-}
-
 /// Caller-supplied connection overrides for a [`LiteLLMOcrRequest`], in the
 /// shape hosts receive them: JSON-ish headers, optional timeout, optional
 /// credentials, and per-field provenance in `input_sources`.
@@ -197,14 +68,14 @@ impl OcrConnectionInputs {
         self.input_sources.get(name).copied().unwrap_or_default()
     }
 
-    fn header_pairs(&self) -> Result<Vec<(String, String)>, super::Error> {
+    fn header_pairs(&self) -> Result<Vec<(String, String)>, Error> {
         self.extra_headers
             .iter()
             .map(|(name, value)| {
                 value
                     .as_str()
                     .map(|value| (name.clone(), value.to_string()))
-                    .ok_or_else(|| super::Error::RequestField {
+                    .ok_or_else(|| Error::RequestField {
                         path: format!("extra_headers.{name}"),
                     })
             })
@@ -212,62 +83,6 @@ impl OcrConnectionInputs {
     }
 }
 
-#[derive(Clone)]
-pub struct OcrConnection {
-    pub api_key: Option<String>,
-    pub api_key_source: InputSource,
-    pub api_base: Option<String>,
-    pub api_base_source: InputSource,
-    pub extra_headers: Vec<(String, String)>,
-    pub extra_headers_source: InputSource,
-    pub timeout: Duration,
-    pub max_download_bytes: u64,
-    pub max_response_bytes: usize,
-    pub poll_timeout: Duration,
-}
-
-impl OcrConnection {
-    pub(crate) fn new(credentials: ResolvedOcrCredentials, transport: OcrTransportConfig) -> Self {
-        let api_key_source = credentials
-            .api_key
-            .as_ref()
-            .map(Sourced::source)
-            .unwrap_or(InputSource::Deployment);
-        let api_base_source = credentials
-            .api_base
-            .as_ref()
-            .map(Sourced::source)
-            .unwrap_or(InputSource::Deployment);
-        Self {
-            api_key: credentials.api_key.map(Sourced::into_value),
-            api_key_source,
-            api_base: credentials.api_base.map(Sourced::into_value),
-            api_base_source,
-            extra_headers: transport.extra_headers,
-            extra_headers_source: transport.extra_headers_source,
-            timeout: transport.timeout,
-            max_download_bytes: transport.max_download_bytes,
-            max_response_bytes: transport.max_response_bytes,
-            poll_timeout: transport.poll_timeout,
-        }
-    }
-}
-
-impl Default for OcrConnection {
-    fn default() -> Self {
-        Self::new(
-            ResolvedOcrCredentials::default(),
-            OcrTransportConfig::default(),
-        )
-    }
-}
-
-#[derive(Clone, Default)]
-pub(crate) struct ResolvedOcrCredentials {
-    pub api_key: Option<Sourced<String>>,
-    pub api_base: Option<Sourced<String>>,
-}
-
 pub struct LiteLLMOcrRequest<D = OcrDocumentInput> {
     pub model: String,
     pub document: D,
@@ -285,7 +100,7 @@ impl LiteLLMOcrRequest {
         document: impl Into<OcrDocumentInput>,
         custom_llm_provider: Option<&str>,
         optional_params: CallArguments,
-    ) -> Result<Self, super::Error> {
+    ) -> Result<Self, Error> {
         let (model, config) = resolve_provider_config(&model, custom_llm_provider)?;
         let default_transport = OcrTransportConfig::default();
         let max_response_bytes = optional_params
@@ -295,7 +110,7 @@ impl LiteLLMOcrRequest {
                     .as_u64()
                     .and_then(|value| usize::try_from(value).ok())
                     .filter(|value| *value > 0 && *value <= default_transport.max_response_bytes)
-                    .ok_or_else(|| super::Error::RequestField {
+                    .ok_or_else(|| Error::RequestField {
                         path: "max_response_bytes".into(),
                     })
             })
@@ -353,15 +168,8 @@ impl<D> LiteLLMOcrRequest<D> {
         }
     }
 
-    pub(crate) fn response_format(&self) -> Result<OcrResponseFormat, super::Error> {
-        self.optional_params
-            .get("req_format")
-            .filter(|value| !value.is_null())
-            .map(|value| {
-                serde_json::from_value(value.clone()).map_err(|_| super::Error::RequestFormat)
-            })
-            .transpose()
-            .map(|format| format.unwrap_or_default())
+    pub(crate) fn response_format(&self) -> Result<OcrResponseFormat, Error> {
+        response_format(&self.optional_params)
     }
 
     pub fn provider_name(&self) -> &'static str {
@@ -395,7 +203,7 @@ impl LiteLLMOcrRequest {
         custom_llm_provider: Option<&str>,
         optional_params: CallArguments,
         connection: OcrConnectionInputs,
-    ) -> Result<Self, super::Error> {
+    ) -> Result<Self, Error> {
         let request = Self::new(model, document, custom_llm_provider, optional_params)?;
         let transport = request.transport.clone().with_overrides(
             connection.header_pairs()?,
@@ -416,155 +224,6 @@ impl LiteLLMOcrRequest {
 
 pub(crate) type ResolvedOcrRequest = LiteLLMOcrRequest<OcrDocument>;
 
-pub(crate) struct PreparedOcrRequest {
-    pub model: String,
-    pub document: OcrDocument,
-    pub connection: OcrConnection,
-    pub host: super::route::OcrHost,
-    /// Whether the caller handed over the document as is, so the wire body's document
-    /// is the caller's own input rather than something the route prepared.
-    pub caller_document: bool,
-    pub optional_params: CallArguments,
-    pub input_sources: BTreeMap<String, InputSource>,
-    pub azure_ad_token_provider: Option<TokenProviderHandle>,
-    pub(crate) config: OcrConfigKind,
-}
-
-impl PreparedOcrRequest {
-    pub(crate) fn new(
-        request: ResolvedOcrRequest,
-        connection: OcrConnection,
-        host: super::route::OcrHost,
-        caller_document: bool,
-    ) -> Self {
-        let LiteLLMOcrRequest {
-            model,
-            document,
-            credentials: _,
-            transport: _,
-            optional_params,
-            input_sources,
-            azure_ad_token_provider,
-            config,
-        } = request;
-        Self {
-            model,
-            document,
-            connection,
-            host,
-            caller_document,
-            optional_params,
-            input_sources,
-            azure_ad_token_provider,
-            config,
-        }
-    }
-
-    pub(crate) fn response_format(&self) -> Result<OcrResponseFormat, super::Error> {
-        self.optional_params
-            .get("req_format")
-            .filter(|value| !value.is_null())
-            .map(|value| {
-                serde_json::from_value(value.clone()).map_err(|_| super::Error::RequestFormat)
-            })
-            .transpose()
-            .map(|format| format.unwrap_or_default())
-    }
-
-    pub(crate) fn provider_name(&self) -> &'static str {
-        self.config.provider().into()
-    }
-}
-
-#[serde_as]
-#[derive(Clone, Debug, Default, PartialEq, Serialize, Deserialize)]
-pub struct OcrPageDimensions {
-    #[serde_as(deserialize_as = "Option<LaxI64>")]
-    pub dpi: Option<i64>,
-    #[serde_as(deserialize_as = "Option<LaxI64>")]
-    pub height: Option<i64>,
-    #[serde_as(deserialize_as = "Option<LaxI64>")]
-    pub width: Option<i64>,
-}
-
-#[derive(Clone, Debug, Default, PartialEq, Serialize, Deserialize)]
-pub struct OcrPageImage {
-    pub image_base64: Option<String>,
-    pub bbox: Option<Map<String, Value>>,
-    #[serde(flatten)]
-    pub extra_fields: Map<String, Value>,
-}
-
-#[serde_as]
-#[derive(Clone, Debug, Default, PartialEq, Serialize, Deserialize)]
-pub struct OcrPage {
-    #[serde_as(deserialize_as = "LaxI64")]
-    pub index: i64,
-    pub markdown: String,
-    pub images: Option<Vec<OcrPageImage>>,
-    pub dimensions: Option<OcrPageDimensions>,
-    #[serde(flatten)]
-    pub extra_fields: Map<String, Value>,
-}
-
-#[serde_as]
-#[derive(Clone, Debug, Default, PartialEq, Serialize, Deserialize)]
-pub struct OcrUsageInfo {
-    #[serde_as(deserialize_as = "Option<LaxI64>")]
-    pub pages_processed: Option<i64>,
-    #[serde_as(deserialize_as = "Option<LaxI64>")]
-    pub pages_processed_annotation: Option<i64>,
-    #[serde_as(deserialize_as = "Option<FiniteF64>")]
-    pub credits: Option<f64>,
-    #[serde_as(deserialize_as = "Option<LaxI64>")]
-    pub doc_size_bytes: Option<i64>,
-    #[serde(flatten)]
-    pub extra_fields: Map<String, Value>,
-}
-
-#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
-pub struct LiteLLMOcrResponse {
-    pub pages: Vec<OcrPage>,
-    pub model: String,
-    pub document_annotation: Option<Value>,
-    pub usage_info: Option<OcrUsageInfo>,
-    pub content: Option<String>,
-    pub tables: Option<Vec<Map<String, Value>>>,
-    #[serde(rename = "keyValuePairs")]
-    pub key_value_pairs: Option<Vec<Map<String, Value>>>,
-    #[serde(default = "ocr_object")]
-    pub object: String,
-    #[serde(flatten)]
-    pub extra_fields: Map<String, Value>,
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub provider_native_response: Option<Map<String, Value>>,
-}
-
-impl LiteLLMOcrResponse {
-    pub fn new(model: impl Into<String>, pages: Vec<OcrPage>) -> Self {
-        Self {
-            pages,
-            model: model.into(),
-            document_annotation: None,
-            usage_info: None,
-            content: None,
-            tables: None,
-            key_value_pairs: None,
-            object: ocr_object(),
-            extra_fields: Map::new(),
-            provider_native_response: None,
-        }
-    }
-
-    pub fn into_json(self) -> Value {
-        serde_json::to_value(self).expect("OCR response fields are JSON-compatible")
-    }
-}
-
-fn ocr_object() -> String {
-    "ocr".into()
-}
-
 #[cfg(test)]
 mod tests {
     use serde_json::json;
@@ -645,97 +304,7 @@ mod tests {
         };
         assert!(matches!(
             error,
-            super::super::Error::RequestField { ref path } if path == "extra_headers.x-a"
+            Error::RequestField { ref path } if path == "extra_headers.x-a"
         ));
     }
-
-    #[test]
-    fn normalized_response_rejects_invalid_shared_fields() {
-        for fields in [
-            json!({"pages":[{}]}),
-            json!({"pages":[{"index":0,"markdown":false}]}),
-            json!({"pages":[{"index":0,"markdown":"","images":[{"bbox":[]}]}]}),
-            json!({"usage_info":{"pages_processed":1.5}}),
-            json!({"tables":[false]}),
-            json!({"keyValuePairs":[[]]}),
-            json!({"provider_native_response":[]}),
-        ] {
-            let payload: Map<String, Value> = json!({"model":"model", "pages":[]})
-                .as_object()
-                .unwrap()
-                .iter()
-                .chain(fields.as_object().unwrap())
-                .map(|(key, value)| (key.clone(), value.clone()))
-                .collect();
-            assert!(serde_json::from_value::<LiteLLMOcrResponse>(Value::Object(payload)).is_err());
-        }
-        assert!(
-            serde_json::from_value::<OcrDocument>(json!({
-                "type":"image_url", "image_url":"https://example.com/image", "detail":42
-            }))
-            .is_err()
-        );
-    }
-
-    #[test]
-    fn numeric_coercion_preserves_integer_precision_and_rejects_fractional_values() {
-        for (value, expected) in [
-            (json!("9007199254740993.0"), 9_007_199_254_740_993),
-            (json!("+2.000"), 2),
-            (json!("1_000"), 1000),
-            (json!(true), 1),
-            (json!(2.0), 2),
-        ] {
-            let page: OcrPage =
-                serde_json::from_value(json!({"index":value,"markdown":""})).unwrap();
-            assert_eq!(page.index, expected);
-        }
-        for value in [
-            json!("1e2"),
-            json!(".0"),
-            json!("2."),
-            json!("_2"),
-            json!("2__0"),
-            json!(2.5),
-            json!(null),
-        ] {
-            assert!(
-                serde_json::from_value::<OcrPage>(json!({"index":value,"markdown":""})).is_err()
-            );
-        }
-    }
-
-    #[rstest::rstest]
-    #[case::document_url("document_url", "document_name", "application/pdf")]
-    #[case::image_url("image_url", "detail", "image/png")]
-    fn document_variants_preserve_provider_fields_when_rewriting_sources(
-        #[case] kind: &str,
-        #[case] field: &str,
-        #[case] mime_type: &str,
-        #[values(json!("kept"), Value::Null)] extra: Value,
-    ) {
-        let original = "https://example.com/input";
-        let replacement = format!("data:{mime_type};base64,AA==");
-        let document: OcrDocument =
-            serde_json::from_value(json!({"type": kind, kind: original, field: extra})).unwrap();
-        assert_eq!(document.source(), original);
-        assert_eq!(
-            serde_json::to_value(document.with_source(replacement.clone())).unwrap(),
-            json!({"type": kind, kind: replacement, field: extra})
-        );
-    }
-
-    #[test]
-    fn response_serialization_flattens_extra_fields_and_omits_absent_native_response() {
-        let response = LiteLLMOcrResponse {
-            extra_fields: json!({"provider_field":"kept"})
-                .as_object()
-                .unwrap()
-                .clone(),
-            ..LiteLLMOcrResponse::new("model", vec![])
-        };
-        let serialized = response.into_json();
-        assert_eq!(serialized["provider_field"], "kept");
-        assert!(serialized.get("provider_native_response").is_none());
-    }
 }

litellm-rust/crates/core/src/ocr/wire.rs

@@ -1,20 +1,23 @@
 use std::{collections::BTreeMap, time::Duration};
 
 use litellm_auth::InputSource;
+use litellm_llms::base_llm::ocr::{
+    error::Error,
+    transformation::{OcrDocument, decode_request_value},
+};
 use serde::Deserialize;
 use serde_json::{Map, Value};
 
-pub use super::is_supported_request;
-use super::{Error, LiteLLMOcrRequest, OcrConnectionInputs, OcrDocument, OcrDocumentInput};
+use crate::ocr::types::{LiteLLMOcrRequest, OcrConnectionInputs, OcrDocumentInput};
 
 pub fn consumed_optional_params(
     model: &str,
     provider: Option<&str>,
-) -> Result<Vec<crate::call_arguments::ArgumentSpec>, Error> {
-    let specs = super::consumed_optional_params(model, provider)?;
+) -> Result<Vec<litellm_core_utils::call_arguments::ArgumentSpec>, Error> {
+    let specs = crate::ocr::arguments::consumed_optional_params(model, provider)?;
     Ok(consumed_optional_param_names(model, provider)?
         .into_iter()
-        .map(|name| crate::call_arguments::ArgumentSpec {
+        .map(|name| litellm_core_utils::call_arguments::ArgumentSpec {
             name,
             secret: specs.iter().any(|spec| spec.name == name && spec.secret),
         })
@@ -25,7 +28,7 @@ pub fn consumed_optional_param_names(
     model: &str,
     provider: Option<&str>,
 ) -> Result<Vec<&'static str>, Error> {
-    let names = super::consumed_optional_param_names(model, provider)?;
+    let names = crate::ocr::arguments::consumed_optional_param_names(model, provider)?;
     let (_, config) = super::provider_config::resolve_provider_config(model, provider)?;
     if config == super::provider_config::OcrConfigKind::VertexDeepSeek {
         return Ok(names
@@ -99,7 +102,7 @@ pub fn decode_document(value: Value) -> Result<OcrDocument, Error> {
     {
         return Err(Error::MissingDocumentUrl);
     }
-    super::json::decode_request_value(value, "document")
+    decode_request_value(value, "document")
 }
 
 #[cfg(test)]
@@ -108,6 +111,7 @@ mod tests {
     use serde_json::json;
 
     use super::*;
+    use crate::ocr::arguments::is_supported_request;
 
     #[rstest]
     #[case::omitted(json!({"type":"document_url", "document_url":"https://example.com/a.pdf"}))]

litellm-rust/crates/core/src/responses/error.rs

@@ -11,7 +11,7 @@ pub enum Error {
     #[error(transparent)]
     Auth(#[from] litellm_auth::Error),
     #[error(transparent)]
-    Transport(#[from] crate::transport::Error),
+    Transport(#[from] litellm_llms::custom_httpx::transport::Error),
     #[error(transparent)]
-    Headers(#[from] crate::http_utils::HeaderError),
+    Headers(#[from] litellm_llms::custom_httpx::http_handler::HeaderError),
 }

litellm-rust/crates/core/src/responses/mod.rs

@@ -1,4 +1,3 @@
 mod error;
 pub use error::Error;
-pub mod types;
 pub mod websocket;

litellm-rust/crates/core/src/responses/websocket.rs

@@ -6,6 +6,7 @@ use std::{
 };
 
 use futures_util::{SinkExt, StreamExt};
+use litellm_types::responses::streaming_websocket::ResponsesWsEventType;
 use rustls::{ClientConfig, RootCertStore};
 use tokio::{net::TcpStream, sync::Mutex};
 use tokio_tungstenite::{
@@ -20,122 +21,6 @@ use tokio_tungstenite::{
 };
 
 use super::Error;
-use crate::{
-    constants::{OPENAI_RESPONSES_DEFAULT_API_BASE, OPENAI_RESPONSES_PATH},
-    responses::types::{ResponsesWsEvent, ResponsesWsEventType, ResponsesWsTransformResult},
-};
-
-pub trait ResponsesWebSocketProviderConfig: Sync {
-    fn supports_native_websocket(&self) -> bool {
-        false
-    }
-
-    fn model_in_websocket_url(&self) -> bool {
-        true
-    }
-
-    fn complete_websocket_url(&self, api_base: Option<&str>, model: &str) -> String {
-        complete_websocket_url(api_base, model, self.model_in_websocket_url())
-    }
-
-    fn transform_ws_request(
-        &self,
-        event: &ResponsesWsEvent,
-        model: &str,
-    ) -> Result<ResponsesWsTransformResult, Error>;
-
-    fn transform_ws_response(
-        &self,
-        event: &ResponsesWsEvent,
-        model: &str,
-    ) -> Result<ResponsesWsTransformResult, Error>;
-}
-
-pub fn complete_websocket_url(
-    api_base: Option<&str>,
-    model: &str,
-    model_in_websocket_url: bool,
-) -> String {
-    let base = api_base
-        .map(str::trim)
-        .filter(|value| !value.is_empty())
-        .unwrap_or(OPENAI_RESPONSES_DEFAULT_API_BASE);
-    let (base_without_query, query) = base
-        .split_once('?')
-        .map_or((base, None), |(value, query)| (value, Some(query)));
-    let response_url = format!(
-        "{}{}",
-        base_without_query.trim_end_matches('/'),
-        OPENAI_RESPONSES_PATH
-    );
-    let scheme_flipped = if let Some(rest) = response_url.strip_prefix("https://") {
-        format!("wss://{rest}")
-    } else if let Some(rest) = response_url.strip_prefix("http://") {
-        format!("ws://{rest}")
-    } else {
-        response_url
-    };
-    let url = query.map_or(scheme_flipped.clone(), |value| {
-        format!("{scheme_flipped}?{value}")
-    });
-    if !model_in_websocket_url
-        || query.is_some_and(|value| {
-            value
-                .split('&')
-                .any(|part| part.split('=').next() == Some("model"))
-        })
-    {
-        return url;
-    }
-    format!(
-        "{url}{}model={}",
-        if query.is_some() { "&" } else { "?" },
-        percent_encode(model)
-    )
-}
-
-fn percent_encode(value: &str) -> String {
-    value
-        .bytes()
-        .map(|byte| {
-            if byte.is_ascii_alphanumeric() || matches!(byte, b'-' | b'.' | b'_' | b'~') {
-                format!("{}", byte as char)
-            } else {
-                format!("%{byte:02X}")
-            }
-        })
-        .collect()
-}
-
-pub fn enforce_model(event: &ResponsesWsEvent, model: &str) -> ResponsesWsEvent {
-    if !event.is_response_create() {
-        return event.clone();
-    }
-    let mut enforced = event.clone();
-    let has_flat_model = enforced.data.contains_key("model");
-    if let Some(response) = enforced
-        .data
-        .get_mut("response")
-        .and_then(serde_json::Value::as_object_mut)
-    {
-        response.insert(
-            "model".to_string(),
-            serde_json::Value::String(model.to_string()),
-        );
-        if has_flat_model {
-            enforced.data.insert(
-                "model".to_string(),
-                serde_json::Value::String(model.to_string()),
-            );
-        }
-    } else {
-        enforced.data.insert(
-            "model".to_string(),
-            serde_json::Value::String(model.to_string()),
-        );
-    }
-    enforced
-}
 
 pub fn is_terminal_event(event_type: &ResponsesWsEventType) -> bool {
     matches!(
@@ -210,7 +95,9 @@ impl ResponsesWebSocketConnection {
         timeout: Option<Duration>,
     ) -> Result<Self, Error> {
         let mut request = url.into_client_request().map_err(|error| {
-            Error::Transport(crate::transport::Error::Network(error.to_string()))
+            Error::Transport(litellm_llms::custom_httpx::transport::Error::Network(
+                error.to_string(),
+            ))
         })?;
         for (name, value) in headers {
             let header_name = name
@@ -223,7 +110,7 @@ impl ResponsesWebSocketConnection {
         let connect = connect_upstream(request);
         let result = match timeout {
             Some(timeout) => tokio::time::timeout(timeout, connect).await.map_err(|_| {
-                Error::Transport(crate::transport::Error::Network(
+                Error::Transport(litellm_llms::custom_httpx::transport::Error::Network(
                     "Responses WebSocket connection timed out".into(),
                 ))
             })?,
@@ -231,12 +118,14 @@ impl ResponsesWebSocketConnection {
         };
         let (socket, _) = result.map_err(|error| match *error {
             tokio_tungstenite::tungstenite::Error::Http(response) => {
-                Error::Transport(crate::transport::Error::Http {
+                Error::Transport(litellm_llms::custom_httpx::transport::Error::Http {
                     status: response.status().as_u16(),
                     body: String::new(),
                 })
             }
-            other => Error::Transport(crate::transport::Error::Network(other.to_string())),
+            other => Error::Transport(litellm_llms::custom_httpx::transport::Error::Network(
+                other.to_string(),
+            )),
         })?;
         Ok(Self {
             socket: Arc::new(Mutex::new(Some(socket))),
@@ -246,14 +135,17 @@ impl ResponsesWebSocketConnection {
     pub async fn send_text(&self, text: String) -> Result<(), Error> {
         let mut socket = self.socket.lock().await;
         let Some(socket) = socket.as_mut() else {
-            return Err(Error::Transport(crate::transport::Error::Network(
-                "Responses WebSocket is closed".into(),
-            )));
+            return Err(Error::Transport(
+                litellm_llms::custom_httpx::transport::Error::Network(
+                    "Responses WebSocket is closed".into(),
+                ),
+            ));
         };
-        socket
-            .send(Message::Text(text))
-            .await
-            .map_err(|error| Error::Transport(crate::transport::Error::Network(error.to_string())))
+        socket.send(Message::Text(text)).await.map_err(|error| {
+            Error::Transport(litellm_llms::custom_httpx::transport::Error::Network(
+                error.to_string(),
+            ))
+        })
     }
 
     pub async fn recv_text(&self) -> Result<Option<String>, Error> {
@@ -268,9 +160,9 @@ impl ResponsesWebSocketConnection {
                 .map_err(|error| Error::InvalidResponse(error.to_string())),
             Some(Ok(Message::Close(_))) | None => Ok(None),
             Some(Ok(_)) => Ok(None),
-            Some(Err(error)) => Err(Error::Transport(crate::transport::Error::Network(
-                error.to_string(),
-            ))),
+            Some(Err(error)) => Err(Error::Transport(
+                litellm_llms::custom_httpx::transport::Error::Network(error.to_string()),
+            )),
         }
     }
 
@@ -278,72 +170,12 @@ impl ResponsesWebSocketConnection {
         let mut socket = self.socket.lock().await;
         if let Some(socket) = socket.as_mut() {
             socket.close(None).await.map_err(|error| {
-                Error::Transport(crate::transport::Error::Network(error.to_string()))
+                Error::Transport(litellm_llms::custom_httpx::transport::Error::Network(
+                    error.to_string(),
+                ))
             })?;
         }
         *socket = None;
         Ok(())
     }
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    fn event(value: serde_json::Value) -> ResponsesWsEvent {
-        serde_json::from_value(value).expect("valid event")
-    }
-
-    #[test]
-    fn url_construction_matches_python_defaults_and_query_behavior() {
-        assert_eq!(
-            complete_websocket_url(None, "gpt-5", true),
-            "wss://api.openai.com/v1/responses?model=gpt-5"
-        );
-        assert_eq!(
-            complete_websocket_url(Some("http://localhost:8080/"), "gpt 5", true),
-            "ws://localhost:8080/responses?model=gpt%205"
-        );
-        assert_eq!(
-            complete_websocket_url(Some("https://example.test/v1?foo=bar"), "gpt-5", true),
-            "wss://example.test/v1/responses?foo=bar&model=gpt-5"
-        );
-        assert_eq!(
-            complete_websocket_url(Some("https://example.test?model=existing"), "gpt-5", true),
-            "wss://example.test/responses?model=existing"
-        );
-    }
-
-    #[test]
-    fn enforce_model_overrides_flat_and_nested_values() {
-        let flat = enforce_model(
-            &event(serde_json::json!({"type":"response.create","model":"wrong"})),
-            "gpt-5",
-        );
-        assert_eq!(flat.model(), Some("gpt-5"));
-        let nested = enforce_model(
-            &event(serde_json::json!({
-                "type":"response.create",
-                "model":"wrong",
-                "response":{"model":"also-wrong"}
-            })),
-            "gpt-5",
-        );
-        assert_eq!(nested.model(), Some("gpt-5"));
-        assert_eq!(
-            nested
-                .data
-                .get("response")
-                .and_then(|value| value.get("model")),
-            Some(&serde_json::json!("gpt-5"))
-        );
-        let nested_without_flat = enforce_model(
-            &event(serde_json::json!({
-                "type":"response.create",
-                "response":{"model":"also-wrong"}
-            })),
-            "gpt-5",
-        );
-        assert!(!nested_without_flat.data.contains_key("model"));
-    }
-}

litellm-rust/crates/core/src/transport/mod.rs

@@ -1,2 +0,0 @@
-mod error;
-pub use error::Error;

litellm-rust/crates/core/tests/azure_ai_ocr.rs

@@ -1,9 +1,8 @@
+use litellm_llms::base_llm::ocr::error::Error;
 use serde_json::{Value, json};
 
-use super::{
-    LocalOcrHost,
-    test_support::{MockResponse, mock_server, perform_ocr, perform_ocr_with, wire_request},
-};
+use super::test_support::{MockResponse, mock_server, perform_ocr, perform_ocr_with, wire_request};
+use crate::ocr::route::LocalOcrHost;
 
 #[tokio::test]
 async fn facade_executes_azure_mistral_with_prepared_auth() {
@@ -80,3 +79,215 @@ async fn rejects_non_inline_body_after_guardrails() {
     let error = perform_ocr_with(host).await.unwrap_err();
     assert!(error.to_string().contains("data URI"));
 }
+
+mod transformation {
+    use std::sync::{
+        Arc,
+        atomic::{AtomicUsize, Ordering},
+    };
+
+    use litellm_auth::{
+        ResolvedCredential, SecretValue, TokenFuture, TokenProvider, TokenProviderHandle,
+    };
+    use rstest::rstest;
+    use serde_json::json;
+
+    use super::*;
+    use crate::ocr::{
+        test_support::{MockResponse, header, mock_server, perform_ocr},
+        types::LiteLLMOcrRequest,
+        wire::decode_request,
+    };
+
+    #[derive(Debug)]
+    struct CountingToken {
+        token: fn(usize) -> String,
+        calls: AtomicUsize,
+    }
+
+    impl CountingToken {
+        fn new(token: fn(usize) -> String) -> Arc<Self> {
+            Arc::new(Self {
+                token,
+                calls: AtomicUsize::new(0),
+            })
+        }
+
+        fn calls(&self) -> usize {
+            self.calls.load(Ordering::SeqCst)
+        }
+    }
+
+    impl TokenProvider for CountingToken {
+        fn acquire(&self) -> TokenFuture<'_> {
+            let call = self.calls.fetch_add(1, Ordering::SeqCst) + 1;
+            let token = SecretValue::new((self.token)(call));
+            Box::pin(async move {
+                Ok(ResolvedCredential::AccessToken {
+                    token,
+                    expires_on: None,
+                })
+            })
+        }
+    }
+
+    fn numbered_token(call: usize) -> String {
+        format!("callback-{call}")
+    }
+
+    fn azure_request(
+        provider: &Arc<CountingToken>,
+        api_base: Option<&str>,
+        api_key: Option<&str>,
+        extra_headers: Value,
+        optional_params: Value,
+    ) -> LiteLLMOcrRequest {
+        let wire = serde_json::from_value(json!({
+            "model": "azure_ai/mistral-ocr-latest",
+            "document": {"type":"document_url","document_url":"data:application/pdf;base64,YWJj"},
+            "api_key": api_key,
+            "api_base": api_base,
+            "custom_llm_provider": null,
+            "extra_headers": extra_headers,
+            "optional_params": optional_params,
+            "timeout_seconds": 2.0
+        }))
+        .unwrap();
+        LiteLLMOcrRequest {
+            azure_ad_token_provider: Some(TokenProviderHandle::new(provider.clone())),
+            ..decode_request(wire).unwrap()
+        }
+    }
+
+    fn ocr_page() -> MockResponse {
+        MockResponse::json(json!({"pages":[{"index":0,"markdown":"hello"}]}))
+    }
+
+    #[tokio::test]
+    async fn token_provider_result_is_the_bearer_and_is_acquired_for_each_request() {
+        let provider = CountingToken::new(numbered_token);
+        let (base, seen, server) = mock_server(vec![ocr_page(), ocr_page()]).await;
+
+        for _ in 0..2 {
+            perform_ocr(azure_request(
+                &provider,
+                Some(&base),
+                None,
+                Value::Null,
+                json!({}),
+            ))
+            .await
+            .unwrap();
+        }
+        server.await.unwrap();
+
+        assert_eq!(provider.calls(), 2);
+        let requests = seen.lock().unwrap();
+        assert_eq!(
+            requests
+                .iter()
+                .map(|request| header(request, "authorization"))
+                .collect::<Vec<_>>(),
+            [Some("Bearer callback-1"), Some("Bearer callback-2")]
+        );
+    }
+
+    #[rstest]
+    #[case::api_key_skips_provider(Some("resource-key"), Value::Null, json!({}), "Bearer resource-key", 0)]
+    #[case::provider_beats_static_token(
+        None,
+        Value::Null,
+        json!({"azure_ad_token":"static-token"}),
+        "Bearer callback-1",
+        1
+    )]
+    #[case::header_wins_on_the_wire_but_provider_still_runs(
+        None,
+        json!({"Authorization":"Bearer override"}),
+        json!({}),
+        "Bearer override",
+        1
+    )]
+    #[tokio::test]
+    async fn credential_precedence(
+        #[case] api_key: Option<&str>,
+        #[case] extra_headers: Value,
+        #[case] optional_params: Value,
+        #[case] expected_authorization: &str,
+        #[case] expected_calls: usize,
+    ) {
+        let provider = CountingToken::new(numbered_token);
+        let (base, seen, server) = mock_server(vec![ocr_page()]).await;
+
+        perform_ocr(azure_request(
+            &provider,
+            Some(&base),
+            api_key,
+            extra_headers,
+            optional_params,
+        ))
+        .await
+        .unwrap();
+        server.await.unwrap();
+
+        assert_eq!(provider.calls(), expected_calls);
+        let requests = seen.lock().unwrap();
+        assert_eq!(requests.len(), 1);
+        assert_eq!(
+            header(&requests[0], "authorization"),
+            Some(expected_authorization)
+        );
+    }
+
+    #[rstest]
+    #[case::missing_api_base(
+        false,
+        json!({}),
+        numbered_token,
+        |error: &Error| matches!(error, Error::Auth(litellm_auth::Error::MissingApiBase {
+            provider: "Azure AI",
+            environment_variable: "AZURE_AI_API_BASE",
+        })),
+        0
+    )]
+    #[case::unsupported_oidc_reference(
+        true,
+        json!({"azure_ad_token":"oidc/assertion","client_id":"client","tenant_id":"tenant"}),
+        numbered_token,
+        |error: &Error| matches!(error, Error::Auth(litellm_auth::Error::UnsupportedOidcReference)),
+        0
+    )]
+    #[case::empty_provider_token_ignores_static_token(
+        true,
+        json!({"azure_ad_token":"static-token"}),
+        |_| String::new(),
+        |error: &Error| matches!(error, Error::MissingAzureAiCredentials),
+        1
+    )]
+    #[tokio::test]
+    async fn credential_failures_send_no_provider_request(
+        #[case] with_api_base: bool,
+        #[case] optional_params: Value,
+        #[case] token: fn(usize) -> String,
+        #[case] expected: fn(&Error) -> bool,
+        #[case] expected_calls: usize,
+    ) {
+        let provider = CountingToken::new(token);
+        let (base, seen, server) = mock_server(vec![ocr_page()]).await;
+
+        let error = perform_ocr(azure_request(
+            &provider,
+            with_api_base.then_some(base.as_str()),
+            None,
+            Value::Null,
+            optional_params,
+        ))
+        .await
+        .unwrap_err();
+        server.abort();
+
+        assert!(expected(&error), "unexpected error: {error:?}");
+        assert_eq!(provider.calls(), expected_calls);
+        assert!(seen.lock().unwrap().is_empty());
+    }
+}

litellm-rust/crates/core/tests/azure_document_intelligence_ocr.rs

@@ -1,12 +1,13 @@
 use litellm_callbacks::event::CallEvent;
+use litellm_llms::base_llm::ocr::error::Error;
 use rstest::rstest;
 use serde_json::{Value, json};
 
 use super::{
-    LocalOcrHost,
     test_support::{MockResponse, mock_server, perform_ocr, perform_ocr_with, wire_request},
     wire::{OcrWireRequest, decode_request},
 };
+use crate::ocr::route::LocalOcrHost;
 
 fn query_value(url: &str, key: &str) -> Option<String> {
     url::Url::parse(url)
@@ -27,12 +28,13 @@ async fn facade_maps_pages_features_and_url_document() {
         &base,
         json!({"pages":[2,0,0,1],"features":["keyValuePairs","languages"]}),
     );
-    request.document = serde_json::from_value::<super::OcrDocument>(json!({
-        "type":"document_url",
-        "document_url":"https://example.com/document.pdf"
-    }))
-    .unwrap()
-    .into();
+    request.document =
+        serde_json::from_value::<litellm_llms::base_llm::ocr::transformation::OcrDocument>(json!({
+            "type":"document_url",
+            "document_url":"https://example.com/document.pdf"
+        }))
+        .unwrap()
+        .into();
 
     perform_ocr(request).await.unwrap();
     server.await.unwrap();
@@ -52,16 +54,16 @@ async fn facade_maps_pages_features_and_url_document() {
 }
 
 #[rstest]
-#[case(json!({"pages":[true]}), crate::ocr::Error::Pages("expected only integers or only strings".into()))]
-#[case(json!({"pages":[1,"2"]}), crate::ocr::Error::Pages("expected only integers or only strings".into()))]
-#[case(json!({"pages":[-1]}), crate::ocr::Error::Pages("negative page index".into()))]
-#[case(json!({"pages":"1&&features=bad"}), crate::ocr::Error::Pages("invalid native page range".into()))]
-#[case(json!({"features":"languages&pages=1"}), crate::ocr::Error::Features)]
-#[case(json!({"req_format":"azure"}), crate::ocr::Error::RequestFormat)]
+#[case(json!({"pages":[true]}), Error::Pages("expected only integers or only strings".into()))]
+#[case(json!({"pages":[1,"2"]}), Error::Pages("expected only integers or only strings".into()))]
+#[case(json!({"pages":[-1]}), Error::Pages("negative page index".into()))]
+#[case(json!({"pages":"1&&features=bad"}), Error::Pages("invalid native page range".into()))]
+#[case(json!({"features":"languages&pages=1"}), Error::Features)]
+#[case(json!({"req_format":"azure"}), Error::RequestFormat)]
 #[tokio::test]
 async fn rejects_invalid_pages_features_and_format(
     #[case] options: Value,
-    #[case] expected: super::Error,
+    #[case] expected: Error,
 ) {
     let (base, seen, server) = mock_server(vec![MockResponse::json(json!({}))]).await;
     let result = decode_request(OcrWireRequest {
@@ -460,3 +462,207 @@ async fn model_id_is_encoded_and_dot_segments_are_rejected() {
         assert!(error.to_string().contains("dot segment"));
     }
 }
+
+mod transformation {
+    use std::sync::{Arc, Mutex};
+
+    use litellm_callbacks::event::CallEvent;
+    use litellm_llms::base_llm::ocr::transformation::OcrDocument;
+    use serde_json::{Value, json};
+
+    use super::*;
+    use crate::ocr::{
+        route::LocalOcrHost,
+        test_support::{MockResponse, mock_server, perform_ocr, perform_ocr_with, wire_request},
+    };
+
+    #[tokio::test]
+    async fn facade_maps_pages_features_and_url_document() {
+        let (base, seen, server) = mock_server(vec![MockResponse::json(json!({
+            "status":"succeeded",
+            "analyzeResult":{"pages":[]}
+        }))])
+        .await;
+        let mut request = wire_request(
+            "azure_ai/doc-intelligence/prebuilt-read",
+            &base,
+            json!({"pages":[2,0,0,1],"features":["keyValuePairs","languages"], "future_option": {"nested":null}, "extra_body":{"provider_option":false}}),
+        );
+        request.document = serde_json::from_value::<OcrDocument>(json!({
+            "type":"document_url",
+            "document_url":"https://example.com/document.pdf"
+        }))
+        .unwrap()
+        .into();
+
+        perform_ocr(request).await.unwrap();
+        server.await.unwrap();
+        let request = &seen.lock().unwrap()[0];
+        let target = request.split_whitespace().nth(1).unwrap();
+        let url = format!("{base}{target}");
+        assert_eq!(query_value(&url, "pages").as_deref(), Some("1,2,3"));
+        assert_eq!(
+            query_value(&url, "features").as_deref(),
+            Some("keyValuePairs,languages")
+        );
+        let body: Value = serde_json::from_str(request.split_once("\r\n\r\n").unwrap().1).unwrap();
+        assert_eq!(
+            body,
+            json!({"urlSource":"https://example.com/document.pdf", "future_option":{"nested":null}, "provider_option":false})
+        );
+    }
+
+    #[tokio::test]
+    async fn rejects_invalid_pages_features_and_format() {
+        for options in [
+            json!({"pages":[true]}),
+            json!({"pages":[1,"2"]}),
+            json!({"pages":[-1]}),
+            json!({"pages":"1&&features=bad"}),
+            json!({"features":"languages&pages=1"}),
+            json!({"req_format":"azure"}),
+        ] {
+            let request = wire_request(
+                "azure_ai/doc-intelligence/prebuilt-read",
+                "http://127.0.0.1:1",
+                options.clone(),
+            );
+            let rejected = perform_ocr(request).await.is_err();
+            assert!(rejected, "accepted {options}");
+        }
+    }
+
+    #[tokio::test]
+    async fn immediate_response_normalizes_pages_and_preserves_native() {
+        let operation = json!({
+            "status":"succeeded",
+            "operationExtension":42,
+            "analyzeResult":{
+                "content":"A\n\nB",
+                "tables":[{"cells":[]}],
+                "keyValuePairs":[{"key":{"content":"A"}}],
+                "pages":[{
+                    "pageNumber":"2",
+                    "width":"8.5",
+                    "height":11,
+                    "unit":"inch",
+                    "lines":[{"content":"A"},{"content":null},{"content":"B"}]
+                }]
+            }
+        });
+        let (base, _, server) = mock_server(vec![MockResponse::json(operation.clone())]).await;
+        let result = perform_ocr(wire_request(
+            "azure_ai/doc-intelligence/prebuilt-read",
+            &base,
+            json!({"req_format":"native"}),
+        ))
+        .await
+        .unwrap();
+        server.await.unwrap();
+
+        assert_eq!(result.pages[0].index, 1);
+        assert_eq!(result.pages[0].markdown, "A\n\nB");
+        assert_eq!(
+            serde_json::to_value(&result.pages[0].dimensions).unwrap(),
+            json!({"width":816,"height":1056,"dpi":96})
+        );
+        assert_eq!(result.usage_info.as_ref().unwrap().pages_processed, Some(1));
+        let serialized = result.clone().into_json();
+        assert_eq!(serialized["content"], "A\n\nB");
+        assert_eq!(serialized["tables"], json!([{"cells":[]}]));
+        assert_eq!(
+            serialized["keyValuePairs"],
+            json!([{"key":{"content":"A"}}])
+        );
+        assert!(serialized.get("key_value_pairs").is_none());
+        assert_eq!(
+            result.provider_native_response.as_ref(),
+            operation.as_object()
+        );
+    }
+
+    #[tokio::test]
+    async fn accepted_response_polls_to_success_with_only_credentials() {
+        let operation = json!({"status":"succeeded","analyzeResult":{"pages":[]}});
+        let (base, seen, server) = mock_server(vec![
+            MockResponse {
+                status: 202,
+                headers: vec![("Operation-Location", "{base}/operation".into())],
+                body: json!({}),
+            },
+            MockResponse {
+                status: 200,
+                headers: vec![("Retry-After", "0".into())],
+                body: json!({"status":"running"}),
+            },
+            MockResponse::json(operation.clone()),
+        ])
+        .await;
+        let mut request = wire_request(
+            "azure_ai/doc-intelligence/prebuilt-read",
+            &base,
+            json!({"req_format":"native"}),
+        );
+        request
+            .transport
+            .extra_headers
+            .push(("X-Trace".into(), "initial-only".into()));
+
+        let result = perform_ocr(request).await.unwrap();
+        server.await.unwrap();
+        assert_eq!(
+            result.provider_native_response.as_ref(),
+            operation.as_object()
+        );
+        let requests = seen.lock().unwrap();
+        assert_eq!(requests.len(), 3);
+        assert!(requests[0].to_ascii_lowercase().contains("x-trace:"));
+        for poll in &requests[1..] {
+            assert!(!poll.to_ascii_lowercase().contains("x-trace:"));
+            assert!(
+                poll.to_ascii_lowercase()
+                    .contains("ocp-apim-subscription-key: test-key")
+            );
+        }
+    }
+
+    #[tokio::test]
+    async fn accepted_response_emits_response_received_for_submission_and_completed_poll() {
+        let (base, seen, server) = mock_server(vec![
+            MockResponse {
+                status: 202,
+                headers: vec![("Operation-Location", "{base}/operation".into())],
+                body: json!({"submitted": true}),
+            },
+            MockResponse::json(json!({"status":"succeeded"})),
+        ])
+        .await;
+        let responses_received = Arc::new(Mutex::new(Vec::new()));
+        let request_count = seen.clone();
+        let observed = responses_received.clone();
+        let host = LocalOcrHost::new(wire_request(
+            "azure_ai/doc-intelligence/prebuilt-read",
+            &base,
+            json!({}),
+        ))
+        .with_observer(move |event| {
+            if let CallEvent::ResponseReceived { raw } = event {
+                observed
+                    .lock()
+                    .unwrap()
+                    .push((request_count.lock().unwrap().len(), raw.body.clone()));
+            }
+        });
+
+        perform_ocr_with(host).await.unwrap();
+        server.await.unwrap();
+        assert_eq!(seen.lock().unwrap().len(), 2);
+        assert_eq!(
+            *responses_received.lock().unwrap(),
+            [
+                (1, r#"{"submitted":true}"#.to_string()),
+                (2, r#"{"status":"succeeded"}"#.to_string()),
+            ]
+        );
+    }
+}

litellm-rust/crates/core/tests/cohere_ocr.rs

@@ -0,0 +1,136 @@
+mod transformation {
+    use litellm_llms::{
+        base_llm::ocr::{
+            error::Error,
+            transformation::{BaseOcrConfig, OcrDocument, OcrResponseFormat},
+        },
+        cohere::ocr::transformation::*,
+    };
+    use rstest::rstest;
+    use serde_json::{Value, json};
+
+    #[tokio::test]
+    async fn composed_body_preserves_native_document_fields_and_untyped_overrides() {
+        let request = crate::ocr::test_support::wire_request(
+            "cohere/parse",
+            "https://example.com",
+            json!({
+                "output_format":"markdown", "timeout":30,
+                "extra_body":{
+                    "output_format": {"future":true},
+                    "document":{"type":"image_url","image_url":"https://example.com/a.png",
+                        "provider_options":{"nested":[false,0,null]}}
+                }
+            }),
+        );
+        let request = request.with_document(
+            serde_json::from_value(json!({
+                "type":"image_url","image_url":"https://example.com/original.png"
+            }))
+            .unwrap(),
+        );
+        let request = crate::ocr::prepare::prepare_request_for_test(request);
+        let http = CohereParseConfig
+            .prepare_request(
+                &request,
+                &crate::ocr::test_support::ocr_client(),
+                &crate::ocr::test_support::NoHooks,
+            )
+            .await
+            .unwrap();
+        let body: Value = serde_json::from_slice(http.body().unwrap().as_bytes().unwrap()).unwrap();
+        assert_eq!(
+            body,
+            json!({
+                "model":"parse", "output_format":{"future":true},
+                "document":{"type":"image_url","image_url":"https://example.com/a.png",
+                    "provider_options":{"nested":[false,0,null]}}
+            })
+        );
+    }
+
+    #[tokio::test]
+    async fn explicit_null_options_use_defaults_before_http() {
+        let request = crate::ocr::test_support::wire_request(
+            "cohere/parse",
+            "https://example.com",
+            json!({"output_format":null,"req_format":null}),
+        );
+        let request = request.with_document(
+            serde_json::from_value(
+                json!({"type":"image_url","image_url":"https://example.com/a.png"}),
+            )
+            .unwrap(),
+        );
+        assert_eq!(
+            request.response_format().unwrap(),
+            OcrResponseFormat::Litellm
+        );
+        let request = crate::ocr::prepare::prepare_request_for_test(request);
+        let http = CohereParseConfig
+            .prepare_request(
+                &request,
+                &crate::ocr::test_support::ocr_client(),
+                &crate::ocr::test_support::NoHooks,
+            )
+            .await
+            .unwrap();
+        let body: Value = serde_json::from_slice(http.body().unwrap().as_bytes().unwrap()).unwrap();
+        assert_eq!(body["output_format"], "markdown");
+        assert!(body.get("req_format").is_none());
+    }
+
+    #[rstest]
+    #[case::cohere("cohere/parse-v5.0", "POST /v2/parse ")]
+    #[case::azure_ai("azure_ai/Cohere-parse-v5.0", "POST /providers/cohere/v2/parse ")]
+    #[tokio::test]
+    async fn route_sends_image_to_its_parse_endpoint_with_the_bearer_key(
+        #[case] model: &str,
+        #[case] request_line: &str,
+    ) {
+        use crate::ocr::test_support::{MockResponse, header, mock_server, perform_ocr};
+
+        let (base, seen, server) = mock_server(vec![MockResponse::json(json!({"pages":[]}))]).await;
+        let request = crate::ocr::test_support::wire_request(model, &base, json!({}))
+            .with_document(
+                serde_json::from_value::<OcrDocument>(
+                    json!({"type":"image_url","image_url":"data:image/png;base64,YWJj"}),
+                )
+                .unwrap()
+                .into(),
+            );
+
+        perform_ocr(request).await.unwrap();
+        server.await.unwrap();
+
+        let requests = seen.lock().unwrap();
+        assert_eq!(requests.len(), 1);
+        assert!(requests[0].starts_with(request_line), "{}", requests[0]);
+        assert_eq!(
+            header(&requests[0], "authorization"),
+            Some("Bearer test-key")
+        );
+    }
+
+    #[rstest]
+    #[tokio::test]
+    async fn route_rejects_non_image_document_without_a_request(
+        #[values("cohere/parse-v5.0", "azure_ai/Cohere-parse-v5.0")] model: &str,
+    ) {
+        use crate::ocr::test_support::{MockResponse, mock_server, perform_ocr};
+
+        let (base, seen, server) = mock_server(vec![MockResponse::json(json!({"pages":[]}))]).await;
+
+        let error = perform_ocr(crate::ocr::test_support::wire_request(
+            model,
+            &base,
+            json!({}),
+        ))
+        .await
+        .unwrap_err();
+        server.abort();
+
+        assert!(matches!(error, Error::CohereImageOnly), "{error:?}");
+        assert!(seen.lock().unwrap().is_empty());
+    }
+}

litellm-rust/crates/core/tests/deepseek_ocr.rs

@@ -1,17 +1,13 @@
+use litellm_llms::{
+    base_llm::ocr::transformation::{BaseOcrConfig, OcrDocument},
+    vertex_ai::ocr::deepseek_transformation::{
+        DeepSeekOcrParams, DeepSeekOcrResponse, VertexAIDeepSeekOCRConfig,
+        normalize_response as transform_ocr_response,
+    },
+};
 use rstest::rstest;
 use serde_json::{Value, json};
 
-use crate::{
-    llms::{
-        base_llm::ocr::transformation::BaseOcrConfig,
-        vertex_ai::ocr::deepseek_transformation::{
-            DeepSeekOcrParams, DeepSeekOcrResponse, VertexAIDeepSeekOCRConfig,
-            normalize_response as transform_ocr_response,
-        },
-    },
-    ocr::types::OcrDocument,
-};
-
 fn document() -> OcrDocument {
     serde_json::from_value(json!({"type":"image_url","image_url":"gs://bucket/a.png"})).unwrap()
 }

litellm-rust/crates/core/tests/ocr.rs

@@ -5,16 +5,23 @@ use litellm_callbacks::{
     host::{Host, HostOp, HostResult},
     machine::{HostFailure, Machine, MachineStep},
 };
+use litellm_llms::{
+    base_llm::ocr::{
+        error::Error as OcrError,
+        transformation::{LiteLLMOcrResponse, OCR_RESPONSE_MAX_BYTES, OcrTransportConfig},
+    },
+    custom_httpx::llm_http_handler::OcrClient,
+};
 use rstest::rstest;
 use serde_json::{Value, json};
 
 use super::{
-    LocalOcrHost, OcrClient, OcrOp, OcrOpResult, ocr_machine,
     test_support::{
         MockResponse, mock_server, ocr_client, perform_ocr, perform_ocr_with, wire_request,
     },
     wire::{OcrWireRequest, decode_request},
 };
+use crate::ocr::route::{LocalOcrHost, OcrOp, OcrOpResult, ocr_machine};
 
 #[rstest]
 #[case::mistral("mistral/model", json!({}))]
@@ -41,7 +48,7 @@ async fn ocr_contract_upstream_error_preserves_status_body_and_headers(
         .unwrap_err();
     server.await.unwrap();
     assert_eq!(seen.lock().unwrap().len(), 1);
-    let super::Error::Provider {
+    let OcrError::Provider {
         status,
         body,
         headers,
@@ -175,11 +182,12 @@ async fn facade_uses_the_injected_http_client() {
         .default_headers(default_headers)
         .build()
         .unwrap();
-    OcrClient::new(provider_http)
-        .unwrap()
-        .perform(wire_request("mistral/model", &base, json!({})))
-        .await
-        .unwrap();
+    crate::ocr::client::perform(
+        &OcrClient::new(provider_http).unwrap(),
+        wire_request("mistral/model", &base, json!({})),
+    )
+    .await
+    .unwrap();
     server.await.unwrap();
     assert!(seen.lock().unwrap()[0].contains("x-transport-owner: host"));
 }
@@ -193,7 +201,7 @@ fn event_name(event: &CallEvent) -> &'static str {
 }
 
 fn recording_host(
-    request: super::LiteLLMOcrRequest,
+    request: crate::ocr::types::LiteLLMOcrRequest,
     events: Arc<Mutex<Vec<&'static str>>>,
     block: bool,
 ) -> LocalOcrHost {
@@ -202,7 +210,7 @@ fn recording_host(
         .with_before_send(move |wire, _| {
             before_send_events.lock().unwrap().push("before_send");
             if block {
-                return Err(crate::ocr::Error::InvalidRequest("blocked".into()));
+                return Err(OcrError::InvalidRequest("blocked".into()));
             }
             Ok(wire)
         })
@@ -259,7 +267,7 @@ async fn before_send_context_names_passthrough_fields_and_secrets() {
         &base,
         json!({"client_secret": "shh", "tenant_id": "t"}),
     );
-    let request = request.with_document(super::OcrDocumentInput::Bytes {
+    let request = request.with_document(crate::ocr::types::OcrDocumentInput::Bytes {
         bytes: b"abc".as_slice().into(),
         file_name: None,
         mime_type: Some("application/pdf".into()),
@@ -302,7 +310,7 @@ async fn lifecycle_blocking_prevents_execution_and_emits_one_failure() {
         true,
     );
     let error = perform_ocr_with(host).await.unwrap_err();
-    assert!(matches!(error, crate::ocr::Error::InvalidRequest(message) if message == "blocked"));
+    assert!(matches!(error, OcrError::InvalidRequest(message) if message == "blocked"));
     assert_eq!(*events.lock().unwrap(), ["before_send", "failure"]);
 }
 
@@ -331,11 +339,11 @@ async fn upstream_failure_emits_one_terminal_failure() {
 async fn drive_until(
     client: OcrClient,
     host: &LocalOcrHost,
-    mut intercept: impl FnMut(WireRequest) -> Result<WireRequest, HostFailure<crate::ocr::Error>>,
+    mut intercept: impl FnMut(WireRequest) -> Result<WireRequest, HostFailure<OcrError>>,
 ) -> (
-    Result<super::LiteLLMOcrResponse, crate::ocr::Error>,
+    Result<LiteLLMOcrResponse, OcrError>,
     Vec<&'static str>,
-    super::OcrMachine,
+    crate::ocr::route::OcrMachine,
 ) {
     let mut machine = ocr_machine(client);
     let mut result = None;
@@ -386,13 +394,13 @@ async fn failed_before_send_does_not_replay_or_reach_transport() {
         json!({}),
     ));
     let (outcome, ops, mut machine) = drive_until(ocr_client(), &host, |_| {
-        Err(HostFailure::Error(crate::ocr::Error::InvalidRequest(
+        Err(HostFailure::Error(OcrError::InvalidRequest(
             "before_send failed".into(),
         )))
     })
     .await;
     assert!(
-        matches!(outcome, Err(crate::ocr::Error::InvalidRequest(message)) if message == "before_send failed")
+        matches!(outcome, Err(OcrError::InvalidRequest(message)) if message == "before_send failed")
     );
     assert_eq!(ops, ["ProjectRequest", "BeforeSend"]);
     assert!(machine.resume(None).await.is_err());
@@ -413,7 +421,7 @@ async fn invalid_provider_response_emits_response_received_before_normalization_
     );
     let error = perform_ocr_with(host).await.unwrap_err();
     server.await.unwrap();
-    assert!(matches!(error, crate::ocr::Error::ResponseField { .. }));
+    assert!(matches!(error, OcrError::ResponseField { .. }));
     assert_eq!(seen.lock().unwrap().len(), 1);
     assert_eq!(
         *responses_received.lock().unwrap(),
@@ -435,14 +443,14 @@ async fn direct_native_host_drives_the_same_state_machine() {
     assert_eq!(ops, ["ProjectRequest", "BeforeSend", "response"]);
     assert!(matches!(
         machine.resume(None).await,
-        Err(crate::ocr::Error::InvalidRequest(_))
+        Err(OcrError::InvalidRequest(_))
     ));
 }
 
 async fn drive_native_file_call(
-    request: super::LiteLLMOcrRequest<super::OcrDocumentInput>,
-    content: Result<super::OcrFileContent, crate::ocr::Error>,
-) -> (Result<super::LiteLLMOcrResponse, crate::ocr::Error>, usize) {
+    request: crate::ocr::types::LiteLLMOcrRequest<crate::ocr::types::OcrDocumentInput>,
+    content: Result<crate::ocr::types::OcrFileContent, OcrError>,
+) -> (Result<LiteLLMOcrResponse, OcrError>, usize) {
     let reads = Arc::new(Mutex::new(0));
     let counted = reads.clone();
     let content = Mutex::new(Some(content));
@@ -462,13 +470,13 @@ async fn host_reader_documents_are_read_once_at_the_core_selected_point_and_enco
     }))])
     .await;
     let request = wire_request("mistral/model", &base, json!({})).with_document(
-        super::OcrDocumentInput::HostReader {
+        crate::ocr::types::OcrDocumentInput::HostReader {
             mime_type: Some("application/pdf".into()),
         },
     );
     let (response, reads) = drive_native_file_call(
         request,
-        Ok(super::OcrFileContent {
+        Ok(crate::ocr::types::OcrFileContent {
             bytes: b"abc".as_slice().into(),
             file_name: Some("scan.png".into()),
         }),
@@ -484,30 +492,27 @@ async fn host_reader_documents_are_read_once_at_the_core_selected_point_and_enco
 async fn host_reader_failures_and_empty_files_fail_before_the_provider_is_called() {
     let (base, seen, _server) = mock_server(vec![]).await;
     let request = wire_request("mistral/model", &base, json!({}));
-    let failure = crate::ocr::Error::InvalidRequest("reader exploded".into());
+    let failure = OcrError::InvalidRequest("reader exploded".into());
     let (response, reads) = drive_native_file_call(
-        request.with_document(super::OcrDocumentInput::HostReader { mime_type: None }),
+        request.with_document(crate::ocr::types::OcrDocumentInput::HostReader { mime_type: None }),
         Err(failure.clone()),
     )
     .await;
     assert!(
-        matches!(response.unwrap_err(), crate::ocr::Error::InvalidRequest(message) if message == "reader exploded")
+        matches!(response.unwrap_err(), OcrError::InvalidRequest(message) if message == "reader exploded")
     );
     assert_eq!(reads, 1);
 
     let request = wire_request("mistral/model", &base, json!({}));
     let (response, _) = drive_native_file_call(
-        request.with_document(super::OcrDocumentInput::HostReader { mime_type: None }),
-        Ok(super::OcrFileContent {
+        request.with_document(crate::ocr::types::OcrDocumentInput::HostReader { mime_type: None }),
+        Ok(crate::ocr::types::OcrFileContent {
             bytes: Default::default(),
             file_name: None,
         }),
     )
     .await;
-    assert!(matches!(
-        response.unwrap_err(),
-        crate::ocr::Error::EmptyFile
-    ));
+    assert!(matches!(response.unwrap_err(), OcrError::EmptyFile));
     assert!(seen.lock().unwrap().is_empty());
 }
 
@@ -522,16 +527,13 @@ async fn path_documents_are_read_by_core_without_a_host_operation() {
     let path = dir.join("scan.png");
     std::fs::write(&path, b"abc").unwrap();
     let request = wire_request("mistral/model", &base, json!({})).with_document(
-        super::OcrDocumentInput::Path {
+        crate::ocr::types::OcrDocumentInput::Path {
             path: path.clone(),
             mime_type: None,
         },
     );
-    let (response, reads) = drive_native_file_call(
-        request,
-        Err(crate::ocr::Error::InvalidRequest("unused".into())),
-    )
-    .await;
+    let (response, reads) =
+        drive_native_file_call(request, Err(OcrError::InvalidRequest("unused".into()))).await;
     server.await.unwrap();
     std::fs::remove_dir_all(&dir).unwrap();
     assert_eq!(response.unwrap().pages[0].markdown, "path");
@@ -541,16 +543,16 @@ async fn path_documents_are_read_by_core_without_a_host_operation() {
     let (base, seen, _server) = mock_server(vec![]).await;
     let request = wire_request("mistral/model", &base, json!({}));
     let (response, _) = drive_native_file_call(
-        request.with_document(super::OcrDocumentInput::Path {
+        request.with_document(crate::ocr::types::OcrDocumentInput::Path {
             path: path.clone(),
             mime_type: None,
         }),
-        Err(crate::ocr::Error::InvalidRequest("unused".into())),
+        Err(OcrError::InvalidRequest("unused".into())),
     )
     .await;
     assert!(matches!(
         response.unwrap_err(),
-        crate::ocr::Error::FileRead { path: failed, source } if failed == path && source.kind() == std::io::ErrorKind::NotFound
+        OcrError::FileRead { path: failed, source } if failed == path && source.kind() == std::io::ErrorKind::NotFound
     ));
     assert!(seen.lock().unwrap().is_empty());
 }
@@ -563,14 +565,12 @@ async fn cancellation_at_before_send_prevents_execution_and_further_resumption()
         json!({}),
     ));
     let (outcome, ops, mut machine) = drive_until(ocr_client(), &host, |_| {
-        Err(HostFailure::Cancelled(crate::ocr::Error::InvalidRequest(
+        Err(HostFailure::Cancelled(OcrError::InvalidRequest(
             "cancelled".into(),
         )))
     })
     .await;
-    assert!(
-        matches!(outcome, Err(crate::ocr::Error::InvalidRequest(message)) if message == "cancelled")
-    );
+    assert!(matches!(outcome, Err(OcrError::InvalidRequest(message)) if message == "cancelled"));
     assert_eq!(ops, ["ProjectRequest", "BeforeSend"]);
     assert!(machine.resume(Some(HostResult::Emitted)).await.is_err());
 }
@@ -596,10 +596,7 @@ async fn missing_host_result_preserves_pending_operation() {
     ));
 }
 
-async fn read_bounded_response(
-    response: Vec<u8>,
-    limit: usize,
-) -> Result<bytes::Bytes, super::Error> {
+async fn read_bounded_response(response: Vec<u8>, limit: usize) -> Result<bytes::Bytes, OcrError> {
     use tokio::io::{AsyncReadExt, AsyncWriteExt};
 
     let listener = tokio::net::TcpListener::bind("127.0.0.1:0").await.unwrap();
@@ -618,7 +615,7 @@ async fn read_bounded_response(
         .unwrap();
     let result = tokio::time::timeout(
         std::time::Duration::from_secs(2),
-        super::client::read_response_bytes(response, limit),
+        litellm_llms::custom_httpx::llm_http_handler::read_response_bytes(response, limit),
     )
     .await;
     server.abort();
@@ -628,7 +625,7 @@ async fn read_bounded_response(
 
 #[tokio::test]
 async fn response_limit_accepts_exact_size_and_rejects_declared_and_chunked_overflow() {
-    use super::Error;
+    use litellm_llms::base_llm::ocr::error::Error;
 
     for response in [
         "HTTP/1.1 200 OK\r\nContent-Length: 8\r\n\r\nabcdefgh",
@@ -670,7 +667,10 @@ async fn oversized_error_retains_http_status_and_bounded_diagnostics_without_dra
         .await
         .unwrap_err();
     match error {
-        super::Error::Transport(crate::transport::Error::Http { status, body }) => {
+        OcrError::Transport(litellm_llms::custom_httpx::transport::Error::Http {
+            status,
+            body,
+        }) => {
             assert_eq!(status, 429);
             assert_eq!(body, prefix);
         }
@@ -693,7 +693,7 @@ fn response_limit_is_validated_and_not_forwarded_to_the_provider() {
         json!(true),
         json!("123"),
         json!(1.5),
-        json!(crate::constants::OCR_RESPONSE_MAX_BYTES + 1),
+        json!(OCR_RESPONSE_MAX_BYTES + 1),
         Value::Null,
     ] {
         let wire = serde_json::from_value(json!({
@@ -738,8 +738,8 @@ async fn interrupt_drops_provider_captures_before_returning() {
     let entered = Arc::new(tokio::sync::Notify::new());
     let dropped = Arc::new(AtomicBool::new(false));
     let request = wire_request("azure_ai/mistral-ocr", "https://example.invalid", json!({}));
-    let request = super::LiteLLMOcrRequest {
-        transport: super::OcrTransportConfig {
+    let request = crate::ocr::types::LiteLLMOcrRequest {
+        transport: OcrTransportConfig {
             extra_headers: vec![("authorization".into(), "Bearer test-key".into())],
             ..request.transport
         },
@@ -774,24 +774,24 @@ async fn interrupt_drops_provider_captures_before_returning() {
     .await
     .unwrap();
     assert!(!dropped.load(Ordering::SeqCst));
-    let selected = crate::ocr::Error::InvalidRequest("cancelled".into());
+    let selected = OcrError::InvalidRequest("cancelled".into());
     let acknowledgement = machine.interrupt(HostFailure::Cancelled(selected.clone()));
     assert!(
         dropped.load(Ordering::SeqCst),
         "interrupt returned while provider captures were still alive"
     );
     assert!(
-        matches!(acknowledgement.await, Err(crate::ocr::Error::InvalidRequest(message)) if message == "cancelled")
+        matches!(acknowledgement.await, Err(OcrError::InvalidRequest(message)) if message == "cancelled")
     );
 }
 
 struct CallerTokenHost {
-    request: Mutex<Option<super::LiteLLMOcrRequest>>,
+    request: Mutex<Option<crate::ocr::types::LiteLLMOcrRequest>>,
     trace: Mutex<Vec<String>>,
 }
 
-impl Host<super::Ocr> for CallerTokenHost {
-    async fn route(&self, op: OcrOp) -> Result<OcrOpResult, crate::ocr::Error> {
+impl Host<crate::ocr::route::Ocr> for CallerTokenHost {
+    async fn route(&self, op: OcrOp) -> Result<OcrOpResult, OcrError> {
         match op {
             OcrOp::ProjectRequest => {
                 self.trace.lock().unwrap().push("project".into());
@@ -808,7 +808,7 @@ impl Host<super::Ocr> for CallerTokenHost {
                     )),
                 ))
             }
-            OcrOp::ReadDocument => Err(crate::ocr::Error::InvalidRequest("no reader".into())),
+            OcrOp::ReadDocument => Err(OcrError::InvalidRequest("no reader".into())),
         }
     }
 
@@ -816,7 +816,7 @@ impl Host<super::Ocr> for CallerTokenHost {
         &self,
         wire: WireRequest,
         _: &litellm_callbacks::event::RequestContext,
-    ) -> Result<WireRequest, crate::ocr::Error> {
+    ) -> Result<WireRequest, OcrError> {
         let is_authorization = |name: &str| name.eq_ignore_ascii_case("authorization");
         let authorization = wire
             .headers
@@ -910,7 +910,7 @@ async fn interrupting_an_in_flight_provider_request_closes_its_connection() {
     .await
     .unwrap();
 
-    let cancelled = crate::ocr::Error::InvalidRequest("cancelled".into());
+    let cancelled = OcrError::InvalidRequest("cancelled".into());
     assert!(
         machine
             .interrupt(HostFailure::Cancelled(cancelled))

litellm-rust/crates/core/tests/ocr/passthrough.rs

@@ -1,16 +1,19 @@
-use std::collections::BTreeSet;
-use std::sync::{Arc, Mutex};
+use std::{
+    collections::BTreeSet,
+    sync::{Arc, Mutex},
+};
 
 use litellm_callbacks::event::{RequestContext, WireRequest};
+use litellm_llms::base_llm::ocr::error::Error;
 use rstest::rstest;
 use rstest_reuse::{self, apply, template};
 use serde_json::{Map, Value, json};
 
-use super::LocalOcrHost;
 use super::test_support::{
     MockResponse, SERVED_DOCUMENT, document_server, mock_server, perform_ocr_with, request_body,
     wire_request_with_document,
 };
+use crate::ocr::route::LocalOcrHost;
 
 #[derive(Clone, Copy, Debug)]
 enum Route {
@@ -107,7 +110,7 @@ impl Host {
 
 struct Sent {
     caller: Map<String, Value>,
-    result: Result<(), crate::ocr::Error>,
+    result: Result<(), Error>,
     before_send: Option<(WireRequest, RequestContext)>,
     provider_body: Option<Value>,
 }

litellm-rust/crates/core/tests/ocr/support.rs

@@ -1,5 +1,11 @@
 use std::sync::{Arc, Mutex};
 
+use futures_util::future::BoxFuture;
+use litellm_callbacks::event::{Passthrough, WireRequest};
+use litellm_llms::{
+    base_llm::ocr::{error::Error, transformation::LiteLLMOcrResponse},
+    custom_httpx::llm_http_handler::{CallHooks, OcrClient},
+};
 use serde_json::{Value, json};
 use tokio::{
     io::{AsyncReadExt, AsyncWriteExt},
@@ -7,10 +13,29 @@ use tokio::{
 };
 
 use crate::ocr::{
-    LiteLLMOcrRequest, LiteLLMOcrResponse, LocalOcrHost, OcrClient, ocr_machine,
+    route::{LocalOcrHost, ocr_machine},
+    types::LiteLLMOcrRequest,
     wire::{OcrWireRequest, decode_request},
 };
 
+/// Stands in for a host with no hooks registered: the wire request goes out unchanged
+/// and response events go nowhere.
+pub(crate) struct NoHooks;
+
+impl CallHooks<Error> for NoHooks {
+    fn before_send(
+        &self,
+        wire: WireRequest,
+        _passthrough_fields: Passthrough,
+    ) -> BoxFuture<'_, Result<WireRequest, Error>> {
+        Box::pin(async move { Ok(wire) })
+    }
+
+    fn response_received<'a>(&'a self, _body: &'a [u8]) -> BoxFuture<'a, Result<(), Error>> {
+        Box::pin(async { Ok(()) })
+    }
+}
+
 pub(crate) fn ocr_client() -> OcrClient {
     let document_http = reqwest::Client::builder()
         .redirect(reqwest::redirect::Policy::none())
@@ -19,15 +44,11 @@ pub(crate) fn ocr_client() -> OcrClient {
     OcrClient::for_test(reqwest::Client::new(), document_http)
 }
 
-pub(crate) async fn perform_ocr(
-    request: LiteLLMOcrRequest,
-) -> Result<LiteLLMOcrResponse, crate::ocr::Error> {
-    ocr_client().perform(request).await
+pub(crate) async fn perform_ocr(request: LiteLLMOcrRequest) -> Result<LiteLLMOcrResponse, Error> {
+    crate::ocr::client::perform(&ocr_client(), request).await
 }
 
-pub(crate) async fn perform_ocr_with(
-    host: LocalOcrHost,
-) -> Result<LiteLLMOcrResponse, crate::ocr::Error> {
+pub(crate) async fn perform_ocr_with(host: LocalOcrHost) -> Result<LiteLLMOcrResponse, Error> {
     litellm_callbacks::run::run(ocr_machine(ocr_client()), &host).await
 }
 

litellm-rust/crates/core/tests/reducto_ocr.rs

@@ -1,11 +1,10 @@
 use litellm_callbacks::event::{CallEvent, WireRequest};
+use litellm_llms::base_llm::ocr::{error::Error, transformation::OcrDocument};
 use rstest::rstest;
 use serde_json::{Value, json};
 
-use super::{
-    LocalOcrHost,
-    test_support::{MockResponse, mock_server, perform_ocr, perform_ocr_with, wire_request},
-};
+use super::test_support::{MockResponse, mock_server, perform_ocr, perform_ocr_with, wire_request};
+use crate::ocr::route::LocalOcrHost;
 
 fn request_body(request: &str) -> Value {
     serde_json::from_str(request.split_once("\r\n\r\n").unwrap().1).unwrap()
@@ -85,8 +84,8 @@ async fn data_uri_upload_preserves_multipart_headers(
     } else {
         json!({"type":"document_url","document_url":format!("data:{mime_type};base64,YWJj")})
     };
-    let mut request = super::LiteLLMOcrRequest {
-        document: serde_json::from_value::<super::OcrDocument>(document)
+    let mut request = crate::ocr::types::LiteLLMOcrRequest {
+        document: serde_json::from_value::<OcrDocument>(document)
             .unwrap()
             .into(),
         ..wire_request(&format!("reducto/{model}"), &base, json!({}))
@@ -185,17 +184,14 @@ async fn upload_failure_stops_before_parse() {
 }
 
 #[rstest]
-#[case("https://example.com/a.pdf", crate::ocr::Error::ReductoSource)]
-#[case("reducto://", crate::ocr::Error::RequestField { path: "document file id".into() })]
-#[case("data:application/pdf;base64", crate::ocr::Error::InvalidDataUri)]
-#[case(
-    "data:application/pdf;base64,INVALID!",
-    crate::ocr::Error::InvalidDataUri
-)]
+#[case("https://example.com/a.pdf", Error::ReductoSource)]
+#[case("reducto://", Error::RequestField { path: "document file id".into() })]
+#[case("data:application/pdf;base64", Error::InvalidDataUri)]
+#[case("data:application/pdf;base64,INVALID!", Error::InvalidDataUri)]
 #[tokio::test]
 async fn rejects_invalid_document_sources_before_network(
     #[case] source: &str,
-    #[case] expected: super::Error,
+    #[case] expected: Error,
 ) {
     let (base, seen, server) = mock_server(vec![MockResponse::json(json!({}))]).await;
     let request = super::test_support::with_source(
@@ -220,7 +216,7 @@ async fn rejects_invalid_document_sources_before_network(
 
 #[test]
 fn response_normalization_groups_blocks_and_distinguishes_null_result() {
-    use crate::llms::reducto::ocr::transformation::{
+    use litellm_llms::reducto::ocr::transformation::{
         ReductoResponse, normalize_response as transform_ocr_response,
     };
 
@@ -353,3 +349,236 @@ async fn guardrail_rewrites_document_before_upload() {
     assert!(requests[0].starts_with("POST /parse "));
     assert!(requests[0].contains("reducto://guarded.pdf"));
 }
+
+mod transformation {
+    use litellm_callbacks::event::{CallEvent, WireRequest};
+    use litellm_llms::{
+        base_llm::ocr::transformation::{BaseOcrConfig, OcrConnection, OcrRequestContext},
+        reducto::ocr::transformation::*,
+    };
+    use rstest::rstest;
+
+    use super::*;
+    use crate::ocr::{
+        route::LocalOcrHost,
+        test_support::{MockResponse, mock_server, perform_ocr, perform_ocr_with, wire_request},
+    };
+
+    #[tokio::test]
+    async fn v3_options_preserve_explicit_null() {
+        let overrides =
+            serde_json::from_value(json!({"formatting":null,"settings":{},"unknown":true}))
+                .unwrap();
+        let params = ReductoParseV3Config
+            .map_ocr_params(&overrides, "parse-v3")
+            .unwrap();
+        let client = crate::ocr::test_support::ocr_client();
+        let connection = OcrConnection::default();
+        let document = serde_json::from_value(
+            json!({"type":"document_url","document_url":"reducto://ready.pdf"}),
+        )
+        .unwrap();
+        let body = ReductoParseV3Config
+            .async_transform_ocr_request(
+                "parse-v3",
+                document,
+                &params,
+                &[],
+                OcrRequestContext {
+                    client: &client,
+                    connection: &connection,
+                },
+            )
+            .await
+            .unwrap();
+        assert_eq!(
+            serde_json::to_value(body).unwrap(),
+            json!({
+                "input":"reducto://ready.pdf", "formatting":null, "settings":{}
+            })
+        );
+        let absent = ReductoParseV3Config
+            .map_ocr_params(
+                &litellm_core_utils::call_arguments::CallArguments::default(),
+                "parse-v3",
+            )
+            .unwrap();
+        assert_eq!(serde_json::to_value(absent).unwrap(), json!({}));
+    }
+
+    #[rstest]
+    #[case(
+        "reducto/parse-v3",
+        json!({
+            "formatting":{"table_output_format":"html"},
+            "retrieval":{"chunk_mode":"section"},
+            "settings":{"ocr_system":"standard"},
+            "future_ocr_option":true,
+            "extra_body":{"provider_option":"value"}
+        }),
+        "reducto://already.pdf",
+        json!({
+            "input":"reducto://already.pdf",
+            "formatting":{"table_output_format":"html"},
+            "retrieval":{"chunk_mode":"section"},
+            "settings":{"ocr_system":"standard"},
+            "future_ocr_option":true,
+            "provider_option":"value"
+        })
+    )]
+    #[case(
+        "reducto/parse-legacy",
+        json!({
+            "enhance":{"agentic":[{"type":"table"}]},
+            "future_ocr_option":true,
+            "extra_body":{"provider_option":"value"}
+        }),
+        "reducto://legacy.pdf",
+        json!({
+            "document_url":"reducto://legacy.pdf",
+            "options":{"enhance":{"agentic":[{"type":"table"}]}},
+            "future_ocr_option":true,
+            "provider_option":"value"
+        })
+    )]
+    #[tokio::test]
+    async fn request_mapping_matches_python(
+        #[case] model: &str,
+        #[case] options: Value,
+        #[case] source: &str,
+        #[case] expected: Value,
+    ) {
+        let (base, seen, server) = mock_server(vec![MockResponse::json(json!({
+            "result":{"chunks":[]}
+        }))])
+        .await;
+        let request =
+            crate::ocr::test_support::with_source(wire_request(model, &base, options), source);
+
+        perform_ocr(request).await.unwrap();
+        server.await.unwrap();
+        let requests = seen.lock().unwrap();
+        assert_eq!(requests.len(), 1);
+        assert!(requests[0].starts_with("POST /parse "));
+        assert_eq!(request_body(&requests[0]), expected);
+    }
+
+    #[rstest]
+    #[case("parse-v3")]
+    #[case("parse-legacy")]
+    #[tokio::test]
+    async fn data_uri_upload_preserves_multipart_headers(#[case] model: &str) {
+        let (base, seen, server) = mock_server(vec![
+            MockResponse::json(json!({"file_id":"reducto://uploaded.pdf"})),
+            MockResponse::json(json!({"result":{"chunks":[{"content":"hello"}]}})),
+        ])
+        .await;
+        let mut request = wire_request(&format!("reducto/{model}"), &base, json!({}));
+        request.transport.extra_headers = vec![
+            ("Content-Type".into(), "application/json".into()),
+            ("X-Trace".into(), "upload-test".into()),
+        ];
+
+        let response = perform_ocr(request).await.unwrap();
+        server.await.unwrap();
+        assert_eq!(response.pages[0].markdown, "hello");
+        let requests = seen.lock().unwrap();
+        assert_eq!(requests.len(), 2);
+        assert!(requests[0].starts_with("POST /upload "));
+        assert!(
+            requests[0]
+                .to_ascii_lowercase()
+                .contains("content-type: multipart/form-data; boundary=")
+        );
+        assert!(requests[0].contains("x-trace: upload-test"));
+        assert!(requests[0].contains("application/pdf"));
+        assert!(requests[0].contains("abc"));
+        assert!(requests[1].starts_with("POST /parse "));
+    }
+
+    #[tokio::test]
+    async fn response_received_stays_after_reducto_upload_and_parse() {
+        let (base, seen, server) = mock_server(vec![
+            MockResponse::json(json!({"file_id":"reducto://uploaded.pdf"})),
+            MockResponse::json(json!({"result":{"chunks":[]}})),
+        ])
+        .await;
+        let request_count = seen.clone();
+        let host = LocalOcrHost::new(wire_request("reducto/parse-v3", &base, json!({})))
+            .with_observer(move |event| {
+                if let CallEvent::ResponseReceived { raw } = event {
+                    assert_eq!(request_count.lock().unwrap().len(), 2);
+                    assert_eq!(raw.body, r#"{"result":{"chunks":[]}}"#);
+                }
+            });
+
+        perform_ocr_with(host).await.unwrap();
+        server.await.unwrap();
+        assert_eq!(seen.lock().unwrap().len(), 2);
+    }
+
+    #[rstest]
+    #[case("https://example.com/a.pdf")]
+    #[case("reducto://")]
+    #[case("data:application/pdf;base64")]
+    #[case("data:application/pdf;base64,INVALID!")]
+    #[tokio::test]
+    async fn rejects_invalid_document_sources_before_network(#[case] source: &str) {
+        let request = crate::ocr::test_support::with_source(
+            wire_request("reducto/parse-v3", "http://127.0.0.1:1", json!({})),
+            source,
+        );
+        assert!(perform_ocr(request).await.is_err());
+    }
+
+    #[tokio::test]
+    async fn facade_omits_native_response_by_default_and_preserves_auth_priority() {
+        let raw = json!({"job_id":"job-1","result":{"chunks":[]}});
+        let (base, seen, server) = mock_server(vec![MockResponse::json(raw)]).await;
+        let mut request = crate::ocr::test_support::with_source(
+            wire_request("reducto/parse-v3", &base, json!({})),
+            "reducto://ready.pdf",
+        );
+        request.transport.extra_headers = vec![("authorization".into(), "Bearer existing".into())];
+
+        let response = perform_ocr(request).await.unwrap();
+        server.await.unwrap();
+        assert_eq!(response.provider_native_response, None);
+        assert!(
+            seen.lock().unwrap()[0]
+                .to_ascii_lowercase()
+                .contains("authorization: bearer existing")
+        );
+    }
+
+    #[rstest]
+    #[case("reducto/parse-v3")]
+    #[case("reducto/parse-legacy")]
+    #[tokio::test]
+    async fn guardrail_headers_reach_upload_and_parse(#[case] model: &str) {
+        let (base, seen, server) = mock_server(vec![
+            MockResponse::json(json!({"file_id":"reducto://uploaded.pdf"})),
+            MockResponse::json(json!({"result":{"chunks":[]}})),
+        ])
+        .await;
+        let mut request = wire_request(model, &base, json!({}));
+        request.transport.extra_headers = vec![("authorization".into(), "Bearer original".into())];
+        let host = LocalOcrHost::new(request).with_before_send(|wire, _| {
+            Ok(WireRequest {
+                headers: vec![("authorization".into(), "Bearer guarded".into())],
+                ..wire
+            })
+        });
+
+        perform_ocr_with(host).await.unwrap();
+        server.await.unwrap();
+        let requests = seen.lock().unwrap();
+        assert_eq!(requests.len(), 2);
+        assert!(requests[0].starts_with("POST /upload "));
+        assert!(requests[1].starts_with("POST /parse "));
+        for request in requests.iter() {
+            assert!(request.contains("authorization: Bearer guarded"));
+            assert!(!request.contains("Bearer original"));
+        }
+    }
+}

litellm-rust/crates/core/tests/vertex_ai_deepseek_ocr.rs

@@ -56,11 +56,11 @@ async fn facade_executes_vertex_deepseek_at_the_openai_endpoint() {
 
 #[test]
 fn host_registration_selects_deepseek_without_affecting_mistral() {
-    assert!(crate::ocr::wire::is_supported_request(
+    assert!(crate::ocr::arguments::is_supported_request(
         "deepseek-ocr-maas",
         Some("vertex_ai")
     ));
-    assert!(crate::ocr::wire::is_supported_request(
+    assert!(crate::ocr::arguments::is_supported_request(
         "mistral-ocr-maas",
         Some("vertex_ai")
     ));
@@ -85,3 +85,59 @@ async fn request_controlled_api_base_is_rejected_before_vertex_auth() {
             .contains("request-controlled Vertex AI endpoint")
     );
 }
+
+mod deepseek_transformation {
+    use serde_json::json;
+
+    use super::*;
+    use crate::ocr::test_support::{MockResponse, mock_server, perform_ocr, wire_request};
+
+    #[tokio::test]
+    async fn facade_executes_vertex_deepseek_at_the_openai_endpoint() {
+        let (base, seen, server) = mock_server(vec![MockResponse::json(json!({
+            "choices":[{"message":{"content":"recognized"}}],
+            "usage":{"prompt_tokens":1}
+        }))])
+        .await;
+        let request = wire_request(
+            "vertex_ai/deepseek-ocr-maas",
+            &base,
+            json!({
+                "vertex_project":"project-1",
+                "vertex_location":"europe-west4",
+                "temperature":0.1,
+                "future_ocr_option":true,
+                "extra_body":{"provider_option":"value"}
+            }),
+        );
+        let request = crate::ocr::test_support::with_source(request, "gs://bucket/document.pdf");
+
+        let response = perform_ocr(request).await.unwrap();
+        server.await.unwrap();
+        assert_eq!(response.pages[0].markdown, "recognized");
+        assert_eq!(
+            response.usage_info.unwrap().extra_fields["prompt_tokens"],
+            1
+        );
+        let requests = seen.lock().unwrap();
+        assert!(requests[0].starts_with(
+            "POST /v1/projects/project-1/locations/europe-west4/endpoints/openapi/chat/completions "
+        ));
+        assert!(
+            requests[0]
+                .to_ascii_lowercase()
+                .contains("authorization: bearer test-key")
+        );
+        let body = request_body(&requests[0]);
+        assert_eq!(body["model"], "deepseek-ai/deepseek-ocr-maas");
+        assert_eq!(body["temperature"], 0.1);
+        assert_eq!(body["future_ocr_option"], true);
+        assert_eq!(body["provider_option"], "value");
+        assert!(body.get("vertex_project").is_none());
+        assert!(body.get("extra_body").is_none());
+        assert_eq!(
+            body["messages"][0]["content"][0],
+            json!({"type":"image_url","image_url":"gs://bucket/document.pdf"})
+        );
+    }
+}

litellm-rust/crates/core/tests/vertex_ai_ocr.rs

@@ -1,4 +1,5 @@
 use litellm_auth::InputSource;
+use litellm_llms::base_llm::ocr::transformation::OcrResponseFormat;
 use serde_json::{Value, json};
 
 use super::test_support::{MockResponse, mock_server, perform_ocr, wire_request};
@@ -102,15 +103,14 @@ async fn request_controlled_api_base_is_rejected_before_vertex_auth() {
 async fn adapters_build_complete_requests_and_share_mistral_normalization() {
     use std::time::Duration;
 
-    use crate::{
-        llms::{
-            base_llm::ocr::transformation::BaseOcrConfig,
-            mistral::ocr::transformation::MistralOcrConfig,
-            vertex_ai::ocr::transformation::VertexAiOcrConfig,
-        },
-        ocr::test_support::ocr_client,
+    use litellm_llms::{
+        base_llm::ocr::transformation::BaseOcrConfig,
+        mistral::ocr::transformation::MistralOcrConfig,
+        vertex_ai::ocr::transformation::VertexAiOcrConfig,
     };
 
+    use crate::ocr::test_support::ocr_client;
+
     let client = ocr_client();
     let options = json!({
         "pages": [0, 2],
@@ -132,11 +132,11 @@ async fn adapters_build_complete_requests_and_share_mistral_normalization() {
         super::test_support::resolved_request(vertex),
     );
     let direct_http = MistralOcrConfig
-        .prepare_request(&direct, &client)
+        .prepare_request(&direct, &client, &crate::ocr::test_support::NoHooks)
         .await
         .unwrap();
     let vertex_http = VertexAiOcrConfig
-        .prepare_request(&vertex, &client)
+        .prepare_request(&vertex, &client, &crate::ocr::test_support::NoHooks)
         .await
         .unwrap();
     assert_eq!(direct_http.url().as_str(), "https://mistral.test/v1/ocr");
@@ -164,19 +164,11 @@ async fn adapters_build_complete_requests_and_share_mistral_normalization() {
     let payload = json!({"pages": [{"index": 0, "markdown": "hello"}], "extra": "preserved"});
     let raw = serde_json::to_vec(&payload).unwrap();
     let direct_response = MistralOcrConfig
-        .transform_ocr_response(
-            &direct.model,
-            &raw,
-            crate::ocr::types::OcrResponseFormat::Litellm,
-        )
+        .transform_ocr_response(&direct.model, &raw, OcrResponseFormat::Litellm)
         .unwrap()
         .into_json();
     let vertex_response = VertexAiOcrConfig
-        .transform_ocr_response(
-            &vertex.model,
-            &raw,
-            crate::ocr::types::OcrResponseFormat::Litellm,
-        )
+        .transform_ocr_response(&vertex.model, &raw, OcrResponseFormat::Litellm)
         .unwrap()
         .into_json();
     assert_eq!(direct_response, vertex_response);
@@ -184,3 +176,99 @@ async fn adapters_build_complete_requests_and_share_mistral_normalization() {
     assert_eq!(direct_response["object"], "ocr");
     assert_eq!(direct_response["extra"], "preserved");
 }
+
+mod transformation {
+
+    use rstest::rstest;
+    use serde_json::{Value, json};
+
+    use crate::ocr::test_support::wire_request;
+
+    #[rstest]
+    #[case::mistral(false)]
+    #[case::vertex(true)]
+    #[tokio::test]
+    async fn configs_build_complete_requests_and_share_mistral_normalization(
+        #[case] use_vertex: bool,
+    ) {
+        use std::time::Duration;
+
+        use litellm_llms::{
+            base_llm::ocr::transformation::BaseOcrConfig,
+            mistral::ocr::transformation::MistralOcrConfig,
+            vertex_ai::ocr::transformation::VertexAiOcrConfig,
+        };
+
+        use crate::ocr::test_support::ocr_client;
+
+        let client = ocr_client();
+        let options = json!({
+            "pages": [0, 2],
+            "include_image_base64": true,
+            "vertex_project": "project-1",
+            "vertex_location": "us-central1",
+            "unknown": "preserved"
+        });
+        let direct = wire_request(
+            "mistral/mistral-ocr-maas",
+            "https://mistral.test",
+            options.clone(),
+        );
+        let vertex = wire_request("vertex_ai/mistral-ocr-maas", "https://vertex.test", options);
+        let direct = crate::ocr::prepare::prepare_request_for_test(
+            crate::ocr::test_support::resolved_request(direct),
+        );
+        let vertex = crate::ocr::prepare::prepare_request_for_test(
+            crate::ocr::test_support::resolved_request(vertex),
+        );
+        let direct_http = MistralOcrConfig
+            .prepare_request(&direct, &client, &crate::ocr::test_support::NoHooks)
+            .await
+            .unwrap();
+        let vertex_http = VertexAiOcrConfig
+            .prepare_request(&vertex, &client, &crate::ocr::test_support::NoHooks)
+            .await
+            .unwrap();
+        assert_eq!(direct_http.url().as_str(), "https://mistral.test/v1/ocr");
+        assert_eq!(
+            vertex_http.url().as_str(),
+            "https://vertex.test/v1/projects/project-1/locations/us-central1/publishers/mistralai/models/mistral-ocr-maas:rawPredict"
+        );
+        let http = if use_vertex {
+            &vertex_http
+        } else {
+            &direct_http
+        };
+        assert_eq!(http.method(), reqwest::Method::POST);
+        assert_eq!(http.headers()["authorization"], "Bearer test-key");
+        assert_eq!(http.headers()["content-type"], "application/json");
+        assert_eq!(http.timeout(), Some(&Duration::from_secs(2)));
+        let body: Value = serde_json::from_slice(http.body().unwrap().as_bytes().unwrap()).unwrap();
+        assert_eq!(
+            body,
+            json!({
+                "model": "mistral-ocr-maas",
+                "document": {"type": "document_url", "document_url": "data:application/pdf;base64,YWJj"},
+                "pages": [0, 2],
+                "include_image_base64": true,
+                "unknown": "preserved"
+            })
+        );
+        let payload = serde_json::to_vec(
+            &json!({"pages": [{"index": 0, "markdown": "hello"}], "extra": "preserved"}),
+        )
+        .unwrap();
+        let direct_response = MistralOcrConfig
+            .transform_ocr_response(&direct.model, &payload, Default::default())
+            .unwrap()
+            .into_json();
+        let vertex_response = VertexAiOcrConfig
+            .transform_ocr_response(&vertex.model, &payload, Default::default())
+            .unwrap()
+            .into_json();
+        assert_eq!(direct_response, vertex_response);
+        assert_eq!(direct_response["model"], "mistral-ocr-maas");
+        assert_eq!(direct_response["object"], "ocr");
+        assert_eq!(direct_response["extra"], "preserved");
+    }
+}

litellm-rust/crates/llms/AGENTS.md

@@ -0,0 +1,21 @@
+litellm-llms mirrors `litellm/llms/`: base config traits, provider transformations, and the `custom_httpx` handlers. See `../core/AGENTS.md` for how the crates layer.
+
+## Python/Rust transformation pairs
+
+Use the base OCR and Mistral OCR pairs as the reference when aligning transformations. Derive `src/<relative_path>.rs` from `litellm/llms/<relative_path>.py`, preserving meaningful basenames such as `messages_transformation`
+
+Keep corresponding operation names and parameter names when their responsibilities match. Rust types retain the Python semantic name with Rust acronym casing (`BaseOCRConfig` / `BaseOcrConfig`, `MistralOCRConfig` / `MistralOcrConfig`). Private Python helpers can drop their leading underscore. Give Rust adapter helpers distinct responsibility names rather than duplicating trait method names
+
+Order OCR config methods as supported parameters, credential metadata and connection resolution, health-check input, parameter mapping, environment validation, URL construction, request transformation, async request transformation, response transformation, async response transformation, and error conversion. Put constants and data types before the config, private helpers after it in operation order, and tests last. Rust-only trait hooks follow the corresponding Python methods
+
+Use trait defaults for unchanged inherited behavior and explicit delegation for shared provider behavior. Keep typed inputs, ownership, `Result`, and async I/O idiomatic. A matching path or symbol identifies the counterpart, not a claim of full behavioral parity
+
+Use named `#[rstest]` cases for independent input/output scenarios instead of loops or repeated calls in one test. Inject reusable setup with `#[fixture]` arguments and use `#[with(...)]` for fixture overrides. Keep assertions about the same result together
+
+For base OCR, Python response models live next to `BaseOcrConfig` in `src/base_llm/ocr/transformation.rs`, as they do in Python; Rust context/environment types support the runtime. `BaseOcrConfig::prepare_request` corresponds to Python's HTTP-handler preparation rather than a `BaseOCRConfig` method, and `validate_request_body` is a Rust-only hook. `src/base_llm/ocr/error.rs` and `src/base_llm/ocr/document.rs` are Rust-only: the OCR error taxonomy shared with the route, and inline-document helpers shared by several providers
+
+For Mistral, `async_transform_ocr_request` uses the base default in both languages. `resolve_headers` and `build_ocr_url` implement the respective environment and URL operations, and `normalize_response` implements the typed part of response transformation. Existing auth key/header handling and top-level response-extra preservation differ between languages; layout refactors must preserve those behaviors and verify them with the existing tests
+
+For non-OCR pairs, order corresponding methods as parameter support/mapping, environment validation, URL construction, request transformation, and response transformation, followed by Rust-only runtime hooks. Auth resolution remains split between configs and route preparation in litellm-core. Chat `supported_openai_param_mappings` describes accepted OpenAI/provider name pairs, unlike Python's `get_supported_openai_params` name list. Audio `map_transcription_params` remains a Rust filtering helper
+
+Azure Messages maps to `llms/azure_ai/anthropic/messages_transformation.py`; Bedrock Converse maps to `llms/bedrock/chat/converse_transformation.py`. `AnthropicConfig`, `AmazonConverseConfig`, and the non-OCR base traits are partial ports. `OpenAiResponsesApiConfig` currently implements only the WebSocket surface. Preserve their acceptance gates, passthrough behavior, and host fallback contracts when aligning layout

litellm-rust/crates/llms/Cargo.toml

@@ -0,0 +1,38 @@
+[package]
+name = "litellm-llms"
+version = "0.1.0"
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+
+[features]
+test-support = []
+
+[dependencies]
+litellm-types.workspace = true
+litellm-core-utils.workspace = true
+litellm-auth.workspace = true
+litellm-auth-aws.workspace = true
+litellm-auth-azure.workspace = true
+litellm-auth-gcp.workspace = true
+litellm-callbacks.workspace = true
+litellm-framing.workspace = true
+base64.workspace = true
+bytes.workspace = true
+data-url = "0.3.2"
+futures-util.workspace = true
+reqwest.workspace = true
+serde.workspace = true
+serde_json = { workspace = true, features = ["preserve_order"] }
+serde_path_to_error = "0.1"
+serde_with.workspace = true
+thiserror.workspace = true
+time.workspace = true
+tokio = { workspace = true, features = ["sync"] }
+url.workspace = true
+
+[dev-dependencies]
+aws-smithy-eventstream = "=0.61.1"
+aws-smithy-types = "1.6.1"
+rstest.workspace = true
+tokio.workspace = true

litellm-rust/crates/llms/src/anthropic/batches/transformation.rs

@@ -1,10 +1,13 @@
-use litellm_providers::anthropic::experimental_pass_through::messages::transformation::resolve_anthropic_api_base;
+use litellm_types::llms::anthropic_messages::anthropic_response::AnthropicMessagesResponse;
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
 use time::OffsetDateTime;
 use url::Url;
 
-use crate::messages::{Error, types::AnthropicMessagesResponse};
+use crate::{
+    anthropic::experimental_pass_through::messages::transformation::resolve_anthropic_api_base,
+    base_llm::chat::transformation::Error,
+};
 
 const BATCHES_PATH_SUFFIX: &str = "/v1/messages/batches";
 

litellm-rust/crates/llms/src/anthropic/chat/handler.rs

@@ -1,18 +1,17 @@
 use std::collections::HashMap;
 
+use litellm_types::{
+    llms::openai::{ChatCompletionThinkingBlock, ChatCompletionToolCallChunk},
+    utils::{ChatCompletionChunk, ChatCompletionsUsage},
+};
 use serde_json::Value;
 
-use super::super::experimental_pass_through::messages::streaming::{
-    AnthropicContentBlock, AnthropicContentBlockDelta, AnthropicMessagesStreamEvent,
-    AnthropicStreamUsage,
-};
-use crate::chat_completions::{
-    Error,
-    streaming::StreamTransformer,
-    types::{
-        ChatCompletionChunk, ChatCompletionThinkingBlock, ChatCompletionToolCallChunk,
-        ChatCompletionsUsage,
+use crate::{
+    anthropic::experimental_pass_through::messages::streaming_iterator::{
+        AnthropicContentBlock, AnthropicContentBlockDelta, AnthropicMessagesStreamEvent,
+        AnthropicStreamUsage,
     },
+    base_llm::{base_model_iterator::StreamTransformer, chat::transformation::Error},
 };
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]

litellm-rust/crates/llms/src/anthropic/chat/mod.rs

@@ -0,0 +1,2 @@
+pub mod handler;
+pub mod transformation;

litellm-rust/crates/llms/src/anthropic/chat/tests.rs

@@ -1,7 +1,7 @@
 use serde_json::json;
 
 use super::*;
-use crate::chat::Error;
+use crate::base_llm::chat::transformation::Error;
 
 fn messages(value: Value) -> Vec<ChatMessage> {
     serde_json::from_value(value).expect("valid messages")

litellm-rust/crates/llms/src/anthropic/chat/transformation.rs

@@ -1,18 +1,24 @@
+use litellm_core_utils::{
+    core_helpers::{finish_reason_for, unix_now, usage_from_parts},
+    prompt_templates::factory::{Conversation, build_conversation},
+};
+use litellm_types::{
+    llms::openai::ChatMessage,
+    utils::{ChatCompletionsChoice, ChatCompletionsChoiceMessage, ChatCompletionsResponse},
+};
 use serde_json::{Map, Value, json};
 
-use crate::anthropic::ANTHROPIC_OAUTH_TOKEN_PREFIX;
-use crate::anthropic::experimental_pass_through::messages::transformation::{
-    complete_anthropic_url, resolve_anthropic_api_key,
-};
-use crate::base_llm::chat::transformation::{
-    BaseConfig, ChatCompletionsAuth, Unsupported, unsupported_message, unsupported_param,
-};
-use crate::chat::Error;
-use crate::chat::conversation::{Conversation, build_conversation};
-use crate::chat::response_utils::{finish_reason_for, unix_now, usage_from_parts};
-use crate::chat::types::{
-    ChatCompletionsChoice, ChatCompletionsChoiceMessage, ChatCompletionsResponse, ChatMessage,
-    ProviderChatRequestData, ProviderChatResponseData,
+use crate::{
+    anthropic::{
+        ANTHROPIC_OAUTH_TOKEN_PREFIX,
+        experimental_pass_through::messages::transformation::{
+            complete_anthropic_url, resolve_anthropic_api_key,
+        },
+    },
+    base_llm::chat::transformation::{
+        BaseConfig, ChatCompletionsAuth, Error, ProviderChatRequestData, ProviderChatResponseData,
+        Unsupported, unsupported_message, unsupported_param,
+    },
 };
 
 /// Anthropic parameter names, post `map_openai_params`, that the Rust path can

litellm-rust/crates/llms/src/anthropic/count_tokens/transformation.rs

@@ -1,13 +1,8 @@
+use litellm_types::llms::anthropic_messages::anthropic_request::{AnthropicMessage, SystemPrompt};
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
 
-use crate::{
-    constants::ANTHROPIC_OAUTH_TOKEN_PREFIX,
-    messages::{
-        Error,
-        types::{AnthropicMessage, SystemPrompt},
-    },
-};
+use crate::{anthropic::ANTHROPIC_OAUTH_TOKEN_PREFIX, base_llm::chat::transformation::Error};
 
 const COUNT_TOKENS_ENDPOINT: &str = "https://api.anthropic.com/v1/messages/count_tokens";
 const TOKEN_COUNTING_BETA: &str = "token-counting-2024-11-01";
@@ -97,10 +92,10 @@ impl AnthropicCountTokensConfig for AnthropicCountTokensTransformation {
 
 #[cfg(test)]
 mod tests {
+    use litellm_types::llms::anthropic_messages::anthropic_request::MessageContent;
     use serde_json::{Map, json};
 
     use super::*;
-    use crate::messages::types::MessageContent;
 
     fn message() -> AnthropicMessage {
         AnthropicMessage {

litellm-rust/crates/llms/src/anthropic/experimental_pass_through/messages/mod.rs

@@ -0,0 +1,2 @@
+pub mod streaming_iterator;
+pub mod transformation;

litellm-rust/crates/llms/src/anthropic/experimental_pass_through/messages/streaming_iterator.rs

@@ -9,7 +9,19 @@ use litellm_framing::{
 use serde::{Deserialize, Serialize};
 use serde_json::{Map, Value};
 
-use crate::messages::Error;
+#[derive(Clone, Debug, PartialEq, Eq, thiserror::Error)]
+pub enum Error {
+    #[error("stream framing failed: {0}")]
+    StreamFraming(String),
+    #[error("Anthropic SSE frame has no data")]
+    MissingStreamData,
+    #[error("Anthropic stream event is invalid: {0}")]
+    InvalidStreamEvent(String),
+    #[error("Bedrock event payload is invalid: {0}")]
+    InvalidBedrockPayload(String),
+    #[error("Bedrock event payload has invalid base64: {0}")]
+    InvalidBedrockBase64(String),
+}
 
 #[derive(Clone, Debug, Default, PartialEq, Serialize, Deserialize)]
 pub struct AnthropicStreamUsage {

litellm-rust/crates/llms/src/anthropic/experimental_pass_through/messages/transformation.rs

@@ -1,5 +1,6 @@
-use crate::base_llm::anthropic_messages::transformation::BaseAnthropicMessagesConfig;
-use crate::messages::Error;
+use crate::base_llm::{
+    anthropic_messages::transformation::BaseAnthropicMessagesConfig, chat::transformation::Error,
+};
 
 const ANTHROPIC_API_KEY_ENV: &str = "ANTHROPIC_API_KEY";
 const ANTHROPIC_API_BASE_ENV: &str = "ANTHROPIC_API_BASE";

litellm-rust/crates/llms/src/anthropic/mod.rs

@@ -1,4 +1,6 @@
+pub mod batches;
 pub mod chat;
+pub mod count_tokens;
 pub mod experimental_pass_through;
 
 pub const ANTHROPIC_OAUTH_TOKEN_PREFIX: &str = "sk-ant-oat";

litellm-rust/crates/llms/src/azure_ai/anthropic/messages_transformation.rs

@@ -1,15 +1,19 @@
+use litellm_types::llms::anthropic_messages::{
+    anthropic_request::{
+        AnthropicMessage, AnthropicMessagesRequest, ContentBlock, MessageContent, SystemPrompt,
+    },
+    anthropic_response::AnthropicMessagesResponse,
+};
 use serde_json::{Map, Value};
 
-use crate::anthropic::experimental_pass_through::messages::transformation::{
-    ANTHROPIC_MESSAGES_CONFIG, AnthropicMessagesConfig, non_empty,
-};
-use crate::base_llm::anthropic_messages::transformation::{
-    BaseAnthropicMessagesConfig, MessagesAuthStrategy,
-};
-use crate::messages::Error;
-use crate::messages::types::{
-    AnthropicMessage, AnthropicMessagesRequest, AnthropicMessagesResponse, ContentBlock,
-    MessageContent, SystemPrompt,
+use crate::{
+    anthropic::experimental_pass_through::messages::transformation::{
+        ANTHROPIC_MESSAGES_CONFIG, AnthropicMessagesConfig, non_empty,
+    },
+    base_llm::{
+        anthropic_messages::transformation::{BaseAnthropicMessagesConfig, MessagesAuthStrategy},
+        chat::transformation::Error,
+    },
 };
 
 const AZURE_API_KEY_ENV: &str = "AZURE_API_KEY";