test: allow /v1/messages in supported_endpoints schema

[cursor]

Relevant issues

Linear ticket

Pre-Submission checklist

• I have added meaningful tests
• My PR passes all CI/CD checks (e.g., lint, format, unit tests)
• My PR's scope is as isolated as possible; it only solves 1 specific problem
• I have received a Greptile Confidence Score of at least 4/5 before requesting a maintainer review (Greptile reviews automatically once the PR is opened; only comment @greptileai to re-request a review after pushing changes)

Screenshots / Proof of Fix

Before the fix, misc / Run tests fails on every PR based on litellm_internal_staging with:

FAILED tests/test_litellm/test_utils.py::test_aaamodel_prices_and_context_window_json_is_valid - jsonschema.exceptions.ValidationError: '/v1/messages' is not one of ['/v1/responses', '/v1/embeddings', '/v1/chat/completions', '/v1/completions', '/v1/images/generations', '/v1/realtime', '/v1/realtime/transcription_sessions', '/v1/images/variations', '/v1/images/edits', '/v1/batch', '/v1/audio/transcriptions', '/v1/audio/speech', '/v1/ocr', '/vertex_ai/live', '/v1/realtime/transcription_sessions']

On instance['meta/muse-spark-1.1']['supported_endpoints'][2]:
    '/v1/messages'

Example failure: https://github.com/BerriAI/litellm/actions/runs/29074129118/job/86301878406

Local reproduction of just the schema validation, at commit 6318c7ee3c (with the enum patch applied):

$ python3 -c "
import json
from jsonschema import validate
with open('model_prices_and_context_window.json') as f:
    data = json.load(f)
data.pop('sample_spec', None)
data.pop('fallback_generalizations', None)
with open('tests/test_litellm/test_utils.py') as f:
    src = f.read()
start = src.index('INTENDED_SCHEMA = {')
i = src.index('{', start); depth = 0; begin = i
while i < len(src):
    if src[i] == '{': depth += 1
    elif src[i] == '}':
        depth -= 1
        if depth == 0:
            end = i + 1; break
    i += 1
schema = eval(src[begin:end], {'True': True, 'False': False, 'None': None})
validate(data, schema)
print('OK: schema validation passed')
"
OK: schema validation passed

Without the patch the same script raises the same ValidationError seen in CI.

Type

✅ Test

Changes

meta/muse-spark-1.1 (added in #32701) legitimately declares /v1/messages under supported_endpoints because LiteLLM routes that model through its Anthropic Messages transformation, but the JSON-schema enum in test_aaamodel_prices_and_context_window_json_is_valid was never updated, so the misc / Run tests shard fails on every open PR rebased onto litellm_internal_staging. Added /v1/messages to the enum; /v1/messages is already a first-class LiteLLM endpoint (litellm/main.py, litellm/utils.py, tencent + openai_like messages/transformation.py, proxy pre-call utils, etc.), so no other data or code changes are needed.

  

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[codspeed-hq]

Merging this PR will not alter performance

✅ 31 untouched benchmarks

---

_{Comparing cursor/ci-autofix-automation-c799 (6318c7e) with litellm_internal_staging (2a12707)}