* fix(mcp): upgrade to MCP SDK 2.3.0 and raise the per-event SSE size cap
MCP SDK 2.x reads Streamable HTTP responses through httpx2's SSE parser,
which rejects any single event over 1 MiB, so a large tools/call result
failed with 'SSE stream ended without a response'. mcp 2.3.0 exposes
max_sse_event_size, and MCPClient now passes a 64 MiB default,
configurable with LITELLM_MCP_MAX_SSE_EVENT_SIZE_BYTES
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(mcp): fall back for invalid SSE event limits
* test(mcp): verify configured SSE limits and recovery
* chore(mcp): remove redundant dependency comment
---------
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Joshua Valluru <326636767+joshua-berri@users.noreply.github.com>
* fix(proxy): end a chat completions stream with an error event when a guardrail blocks mid-stream
A streaming guardrail that raised an HTTPException after the first chunk re-raised it inside the SSE generator, so the 200 body was cut off with no finish_reason, no error event and no [DONE]. Build the error frame through sse_error_payload instead, keeping the status, message and structured detail, and encode values JSON cannot represent as strings so the frame always goes out.
* fix(proxy): keep early guardrail blocks on their HTTP status and end mid-stream errors with [DONE]
A guardrail block before the first chunk is raised again, so its response stays the
400 event-stream body it is on main. A mid-stream error event now carries the failure
hook's replacement error when one is returned, is followed by data: [DONE] on
OpenAI-format streams, and leaves the Gemini route's raise unchanged. Error details
JSON cannot encode are written as strings instead of breaking the event.
* fix(proxy): keep a per-chunk guardrail block on the first chunk on its event-stream 400
* fix(proxy): treat a keepalive ping as a started stream so a later guardrail block ends in-band
* fix(proxy): encode non-JSON guardrail details in early stream error frames
An early guardrail block whose detail holds a value JSON cannot encode sent
400 headers and then cut the body. The error frame now writes such a value as
its string form, the same as the mid-stream event. The keepalive test now runs
on a virtual clock instead of real sleeps.
* fix(proxy): show an in-band stream error event as an error in the CLI, Python client, and dashboard playgrounds
ChatClient.completions_stream raises StreamError on a data frame carrying an error, so litellm-proxy chat prints the block reason and keeps the partial reply out of history. The prompt playground and the Interactions playground read the same frame through a shared streamErrorMessage helper. Adds the audit's integration cells for chat stream error events, and makes the endpoint tests' failure-hook mocks return None so they check the real error payload.
* fix(proxy): print stream error text verbatim in the CLI and read split error events in the prompt playground
The CLI printed the server's error message as Rich markup, so a closing tag like [/pii] in a guardrail message crashed lite chat. The prompt playground now buffers partial lines across reads, ChatClient raises only on a non-empty error, StreamError redacts keys like the other client exceptions, and StreamError is exported from litellm.proxy.client
* fix(proxy): print CLI stream errors without Rich highlighting or emoji codes
* test(proxy): cover the CLI's plain-text 400 error print
* test(proxy): annotate the new client stream test locals as Final
* fix(proxy): send the failure hook replacement on Responses streams and before the first chunk
* fix(proxy): end a Responses stream with response.failed when it fails on a built-in exception
* fix(proxy): keep a failure hook replacement before the first chunk in-band so bare stream routes still answer it
A non-HTTP failure whose hook returns an HTTP error was raised before the first
chunk, which create_response turned into the hook's status but which a bare
StreamingResponse route such as /queue/chat/completions answered as a 200 with
zero bytes. Only the original HTTP errors raise now. The replacement goes out as
the stream's error event, which create_response still answers with the hook's
status as a JSON error.
Adds audit round 2's integration cells for failure hook replacements on chat and
Responses streams, built-in exceptions on Responses streams, and the Python client.
* test(proxy): cover a queue stream whose failure hook replaces a failure before the first chunk
The audit cell posts to /queue/chat/completions with a callback that raises before the first chunk and a failure hook that answers 403. It checks for a 200 event stream whose only event is the replacement, then one [DONE], with the callback's own message absent
* feat(guardrails): run each mode only on streaming, non-streaming, or both
Add stream_scope so a rail can target streaming inference, non-streaming inference, or both per pre, during, and post mode
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(guardrails): honor stream_scope in pipelines and dashboard types
Pipeline steps skipped the stream_scope filter, direct construction ignored mixed-case maps, and schema.d.ts was stale.
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(guardrails): skip unmatched stream_scope steps instead of allowing
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(ui): keep stored stream_scope keys for modes not on screen
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(ci): format stream_scope helpers and update fork MCP unit tests
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(mcp): keep hang cancellation tests from timing out during setup
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(guardrails): honor path-defined streaming for stream_scope
Passthrough routes like Gemini streamGenerateContent decide streaming from the URL, so stamp that onto hook data before guardrails run.
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(rust): copy AnthropicModelCapabilities instead of cloning
Clippy treats clone-on-Copy as an error, which failed rust-lint on the messages request tests.
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(guardrails): trust only server stream classification
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(guardrails): keep streaming marker through deepcopy
scan_raw_request snapshots copy each field, so a plain object() marker would lose identity and skip streaming-only rails.
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(cost-map): drop duplicate perceptron-mk1.5 row
Two main cost-map PRs both added the OpenRouter model, so the merge left a second key that CI rejects.
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(rust): expect native transcription 429 as RustUpstreamError
HTTP status errors from native routes map through route_error_to_pyerr, so the wheel SIGINT child was dying on an outdated RuntimeError check and never reached the hang probe.
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(tests): follow Google Interactions OpenAPI without hardcoded names
The live spec dropped CreateModelInteractionParams and renamed the item path to {interactionsId}. Misc CI failed because the compliance tests still looked those names up as literals.
* test(guardrails): reproduce stream_scope bedrock and passthrough field gaps
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(guardrails): cover invalid stored stream_scope reads
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(guardrails): classify bedrock stream actions and keep caller is_streaming_request
Co-authored-by: Shivi Jain <mobile.350017@gmail.com>
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* refactor(guardrails): make stream_scope_allows public and drop mutable builds
Co-authored-by: Shivi Jain <mobile.350017@gmail.com>
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(guardrails): classify pass-through and Bedrock stream scopes
Co-authored-by: Shivi Jain <mobile.350017@gmail.com>
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(guardrails): harden stream classification and validation
Co-authored-by: Shivi Jain <mobile.350017@gmail.com>
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(guardrails): add stream scope integration audit
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(proxy): avoid mutating passthrough custom body
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(guardrails): run stream scope audit without enterprise license
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(guardrails): keep stored scope restart cell on one worker
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(guardrails): scope stream scope audit sink assertions to the rail under test
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(guardrails): assert logging_only scope absence behind an ordered barrier rail
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(guardrails): assert one logging_only scan per phase after the barrier rail
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(guardrails): set request scope on pass-through stream fixtures
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(guardrails): tolerate invalid YAML stream_scope in v1 guardrails list
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* chore: merge main into litellm_guardrail_stream_scope_fixes
Update pass-through pre-call test callbacks for main's endpoint_type argument
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(guardrails): add request paths to pass-through fixtures
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(guardrails): cover websocket pass-through stream scope and LIT-9050 outage spend rows
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* chore(lint): remove unused type discipline suppressions
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(guardrails): script the vertex live upstream in the websocket stream scope test
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(guardrails): keep stream marker json-serializable and restore pass-through helper names
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(lint): allow required Bedrock action re-export
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(guardrails): strip the stream marker from pass-through payloads
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(guardrails): drop stream marker by value in scans and snapshots, plain-tuple stream scope state
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* fix(ui): render tag-scoped guardrail modes read-only in the custom code editor
A guardrail whose litellm_params.mode is the tag-scoped dict {tags, default}
crashed the Custom Code editor on open: normalizeMode wrapped the dict into
the mode array and StreamScopeFields rendered it as a React child (error #31,
whole dashboard unmounted). Treat a non-string non-array mode as no editable
modes, show formatGuardrailMode(mode) in a disabled input (read-only, matching
the guardrail info view), and keep mode/stream_scope out of the update payload
for such guardrails.
* fix(ui): resolve merge fallout in guardrails components
Deduplicate toModeArray import after the merge, and move the read-only
guardrail details block back into GuardrailReadOnlyDetails (now rendering
the shared mode/logging-only rows plus the stream-scope detail) so
guardrail_info.tsx stays under the 800-line lint budget. Guardrails UI
suite: 298 passed.
* fix(ui): drop duplicate toModeArray import reintroduced by merge
* chore(pass-through): document the deliberate in-place marker strip as mutable-ok
The clear/update on _parsed_body is load-bearing: rebinding to a fresh
mapping instead breaks 75 pass-through tests because the marker-free body
must propagate through the caller's request dict so downstream guardrail
scans and snapshots never observe the server streaming marker.
* fix(guardrails): move stream_scope after timeout in CustomGuardrail init
Inserting stream_scope before the existing timeout parameter shifted the
positional slot of timeout, so positional callers constructed with their
timeout bound to stream_scope (ValueError) and timeout silently None.
Restores the base parameter order; keyword callers are unaffected.
* fix(guardrails): typing pass for the lint gates
stream_scope leaves the declared constructor parameters (restoring the
base positional surface; keyword construction unchanged), unknown config
values crossing the new stream-scope code paths get typed locals or
cast-ok boundaries, and the passthrough payload literals are annotated.
All three lint gates pass against current main; the guardrail suites are
unchanged (236+5019 passing; one known anyio-driver failure pre-existing
on base).
* style: sort cast imports for the ruff gate
* chore(pass-through): drop unused BEDROCK_STREAMING_ACTIONS re-export
The streaming check now uses is_bedrock_streaming_endpoint; nothing in
the repo imports the name from this module.
---------
Co-authored-by: Shivi Jain <mobile.350017@gmail.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: yucheng <yucheng@berri.ai>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: gabriele <gabriele@berri.ai>
* refactor(mcp): extract upstream preparation and support modern clients
* fix(mcp): reject incompatible upstream transport before saving
* fix(mcp): serialize protocol validation with server updates
---------
Co-authored-by: Joshua Valluru <326636767+joshua-berri@users.noreply.github.com>
* test(mcp): fire MCP client test deadlines on conditions instead of wall-clock time
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(mcp): bound MCP client test failure paths independently of the triggered deadline
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(mcp): measure outer-deadline cleanup budget from cancellation, not setup
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---------
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(proxy): inject the HIBP client into the breached-password update test
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test(mcp): drive optional-discovery deadlines with an injected loop clock
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* test: bound MCP deadline checks, support Python 3.10, pin HIBP URL
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---------
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* ci: run the unit_selection.sh shard files on every event instead of only fork pull requests
Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
* ci: rename fork-flag to unit-flag now that it applies on every event
* test: move tests/test_litellm root and small trees into tests/unit
Pure renames, no content changes. Follow-up commits in this PR fix
references, merge the three files that already existed in tests/unit,
keep live-provider tests in tests/test_litellm and wire CI.
* test: carry tests/test_litellm conftest isolation into tests/unit
Callback lists, routing fallbacks, cached HTTP clients, logger state, AWS,
proxy-URL and keychain env, and session-end client cleanup now reset for
unit tests too. The environment isolation owns its MonkeyPatch so a test's
own monkeypatch is undone before the model-cost teardown runs.
* test: merge, split and prune the moved root and small-tree tests
Merge batches/test_batch_utils.py and the chat_completions and messages
dispatch tests into the files that already existed in tests/unit. Keep
the live Gemini interactions tests, the async image-fetch format test and
the OpenAI embedding scorer test in tests/test_litellm since they need
real network or keys. Put test_router.py under tests/unit/test_router so
the existing package no longer shadows it. Delete eight tests the audit
found superseded by stronger ones kept in this move.
* ci: run the moved root and small-tree tests under their legacy flags
Add the misc and responses-caching-types flags to unit_selection.sh and
CircleCI, extend enterprise-routing and mcp-integration, and point the
legacy GHA shards, Makefile, redis-compat workflow, merge smoke manifest
and change classifier at the new paths.
* test: make the new tests/unit directories packages
tests/unit/test_package_layout.py requires every directory to carry an
__init__.py, and without one the moved and retained
test_litellm_responses_bridge.py modules collide on import.
* test: scope the unit socket block to tests/unit in shared sessions
The GHA shards collect the legacy test-path and the unit selection in one
pytest session. The unit conftest's loopback-only block leaked into legacy
modules that reach the network at import. The legacy conftest now lifts the
restriction at collect and setup time, and the unit conftest re-applies it
when collecting its own modules.
* test: give the shard-script tests their own GITHUB_OUTPUT
They only passed where the runner set it. The CircleCI unit job's env
allowlist drops it, so the script's redirect failed there.
* test: point the router and module-deletion checks at tests/unit
router_code_coverage and code_qa_check_tests only searched tests/test_litellm,
so the moved router tests no longer counted. The two silent-experiment tests
the audit deleted were the only direct callers of those methods; they are
replaced with tests that assert the forwarded shadow request and the
recursion guard.
---------
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
