* fix(vertex_ai): drop the caller's anthropic-version header on Claude /v1/messages
Vertex reads the API version from the body's anthropic_version and answers 400 when a forwarded anthropic-version header names a different one, which anthropic SDK 2.x always does. Strip the header on the Python and LITELLM_RUST Vertex messages routes.
* fix(vertex_ai): carry the caller's anthropic-version into the Claude /v1/messages body
Vertex reads the API version from the body alone, so the caller's
anthropic-version header now becomes the body's anthropic_version instead
of a pinned vertex-2023-10-16. The 2023-01-01 and 2023-06-01 first-party
versions keep vertex-2023-10-16, and the header itself is still never sent.
Same change on the Python proxy and the Rust gateway.
* fix(vertex_ai): follow drop_params for an anthropic-version Vertex does not accept
Only versions Vertex accepts in the body (vertex-2023-10-16, 2026-10-21) are
carried into anthropic_version. 2023-06-01, 2023-01-01, a blank header, or no
header keep vertex-2023-10-16. Any other value drops to vertex-2023-10-16 under
drop_params and answers a 400 naming drop_params without it, on the Python proxy
and the Rust gateway.
* refactor(vertex_ai): return the unsupported anthropic-version error as a value and keep Rust helpers and tests in place
* fix(rust gateway): resolve os.environ drop_params and accept the same flag words as Python
The gateway read drop_params: os.environ/NAME and words like yes as off, so the drop_params opt-out from the new anthropic-version 400 did not work there
* docs(rust router): name Router::from_config in the crate README
---------
Co-authored-by: mateo-berri <277851410+mateo-berri@users.noreply.github.com>
* refactor(rust): give Messages configs typed litellm params
* feat(rust): port _normalize_system_role_messages for Messages hosts
mid_conversation_system mirrors Python's module function for function: a
leading run of system turns is hoisted into the top-level system, a later
turn stays in place when the model map flags supports_mid_conversation_system
and otherwise becomes a user turn where it was, never between a tool_use and
its tool_result, and billing blocks are stripped from the hoisted system. The
capability joins MessagesModelCapabilities and the bridge projection. Azure AI
uses it in place of fold_system_role_messages, which hoisted every turn.
* fix(rust): keep the Bedrock runtime endpoint behind a blank api_base
* refactor(rust): import LitellmParams from its crate instead of a re-export
* refactor(rust): template the Messages request decode errors
Both decode failures go through ErrorDetail::invalid with the subject and the
serde error as source instead of a preformatted sentence.
* refactor(rust_bridge): read the module globals the param specs name
The Messages host no longer keeps its own list of litellm globals; a spec
whose spellings the call leaves out names the global to read, so the next
family that has one needs no host change.
* refactor(rust): give each route lookup Python's implicit None
ProviderConfigManager's per-route methods list only the providers the route
serves and fall through to None; the Rust lookups now do the same, so a new
LlmProviders variant touches only the route that serves it.
* refactor(rust): separate Messages settings from capability inputs
* refactor(rust-bridge): unify Messages OCR and Responses call inputs
* refactor(rust-bridge): share NativeCall across inference entrypoints
* fix(rust-bridge): preserve Responses URL aliases and public test inputs
* refactor(rust): rename litellm-core to litellm-inference
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* refactor(rust): expose inference base API for format crates
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(rust): move shared inference test helpers behind test-support
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---------
Co-authored-by: Yujong Lee <yujong@berri.ai>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* refactor(rust): prepare inference and auth foundations
* fix(rust): keep textract operations parsing from kebab-case model names
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* done
* refactor(types): derive Anthropic beta string conversions with Strum
* fix(anthropic): report missing max_tokens as a missing field
* refactor(rust): type Anthropic messages headers and auth after the Python layout
Delete anthropic/messages/headers.rs. Its OAuth handling, credential ladder
and beta merging move to anthropic/common_utils.rs where Python keeps them
(optionally_handle_anthropic_oauth, get_auth_header, _merge_beta_headers),
and the feature beta injection becomes update_headers_with_anthropic_beta on
the messages config, as in Python. The BaseAnthropicMessagesConfig impl is
unchanged apart from the bodies of validate_environment and request_headers
Beta values are now the AnthropicBeta enum and BetaSet, which sort, dedupe
and comma-join by construction. Request params gain typed speed, tools and
context_management through Recognized, so the beta logic matches on enums
instead of string-comparing JSON. OauthToken parses the sk-ant-oat token once
and the chat config shares that detection instead of its own copy
Case-insensitive header helpers move next to has_header in litellm-http.
One deliberate divergence: a Bearer-prefixed OAuth key configured through
api_key or ANTHROPIC_API_KEY is sent with a single Bearer scheme, where
Python would emit "Bearer Bearer"
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
* done
* fix(rust): repair test compilation and clippy failures
resolve auth before building the outbound request in prepare tests, give the host hook tests their own error type, and drop the disallowed reqwest client and err().expect() from core tests
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---------
Co-authored-by: Yujong Lee <yujong@berri.ai>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
