Commit graph

10992 commits

Author SHA1 Message Date
devin-ai-integration[bot]
9d6d6c4fe0
fix(agents): allow optional securityScheme fields so /public/agent_hub does not 500 (#33897)
Co-authored-by: shivam <shivam@berri.ai>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
2026-07-20 18:13:09 -07:00
devin-ai-integration[bot]
089de50d20
fix(auth): apply temp_budget_increase for cache-hit keys (#33841)
temp_budget_increase was only applied on the DB-fetch path of _user_api_key_auth_builder, so a key served from the auth cache reverted to its original max_budget and was wrongly blocked with BudgetExceededError once spend crossed the original budget while staying under the effective budget.

Move _update_key_budget_with_temp_budget_increase out of the DB-only branch so it runs for every resolved token regardless of source. The cache stores the original budget and each cache hit returns a fresh model_copy(), so this never double-applies.

Fixes #25760

Co-authored-by: shivam <shivam@berri.ai>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
2026-07-20 18:12:15 -07:00
Mateo Wang
1e741094fe
Merge pull request #33807 from BerriAI/litellm_vertex_azure_midsys
fix(vertex,azure): model-aware mid-conversation system for Claude /v1/messages
2026-07-20 20:48:47 -04:00
devin-ai-integration[bot]
10d2a27d87
fix(proxy/auth): handle tz-aware temp_budget_expiry (#33840)
Co-authored-by: shivam <shivam@berri.ai>
Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
2026-07-20 17:43:57 -07:00
ryan-crabbe-berri
46a80e1ef5
fix(auth): set budget_reset_at when JWT upsert seeds a budget_duration (#34050)
The JWT first-login upsert in get_user_object creates the user row by
merging default_internal_user_params straight into table.create, so a
configured budget_duration landed with budget_reset_at NULL. The reset
sweep now heals such rows (PR #33623), but until the next sweep the row
shows a null reset time and its first window starts at the sweep instead
of one full duration after creation. Compute budget_reset_at at creation
like every other write path (/user/new, UI SSO, /key/generate, /team/new)
already does
2026-07-20 17:23:44 -07:00
Yassin Kortam
2c99b7804e
perf(core): fast-path SafeAttributeModel.__delattr__ for declared fields (#33993)
Continues #29762. Response models (Message, Choices, Usage) delete unset
optional fields in __init__ so model_dump matches the OpenAI spec. Each delete
routed through pydantic's BaseModel.__delattr__, whose per-call
ModelMetaclass.__getattr__ lookup and _check_frozen dominate construction. When
the target is a declared field already present in __dict__ on a non-frozen
model, delete it with object.__delattr__ directly; that is exactly what pydantic
2.13 does for that case, minus the metaclass getattr and the frozen check. It
falls back to the previous super().__delattr__ path for extras, private
attributes, cached properties and missing names, so behavior is unchanged.

Co-authored-by: Jay Gowdy <jgowdy@godaddy.com>
2026-07-21 00:06:56 +00:00
Joseph Yeung
ffe56cf5a2
fix(budget): reset users/teams with NULL budget_reset_at (#33623)
Internal users seeded from default_internal_user_params (SSO/JWT first-login
upsert, or /user/new without an explicit budget_reset_at) get budget_duration
set but budget_reset_at = NULL. The ResetBudgetJob user/team queries filter on
{"budget_reset_at": {"lt": now}}, which never matches NULL, so these rows are
never reset: their spend accumulates for the lifetime of the row and silently
exceeds max_budget with no periodic reset.

The budget-table query already handles this by OR-ing in a
{budget_reset_at IS NULL AND budget_duration IS NOT NULL} branch. Apply the
same pattern to the user and team reset queries in PrismaClient.get_data.

Adds a regression test asserting both the user and team reset queries select
NULL-budget_reset_at rows that have a budget_duration.

Co-authored-by: yuneng-jiang <yuneng@berri.ai>
Co-authored-by: Mateo Wang <277851410+mateo-berri@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-20 16:55:38 -07:00
mateo-berri
8b1a19fb02 test: give cost-map guard next() a default so a renamed rule fails with a clear assertion 2026-07-20 16:50:15 -07:00
mateo-berri
335b79d635 test(e2e): mark vertex mid-conversation system rows proven after live QA
Ran the before/after proof live against Vertex Claude (global endpoint,
project vertex-check-481318): base transform 400s an unflagged model
(claude-opus-4-7) on a mid-conversation role:system reminder, the fix
hoists it to a 200, and a flagged model (claude-opus-4-8) keeps the
reminder in messages with cache_read held at 15615 across the reminder
turn. Flip both vertex.mid_conversation_system rows to fail_before_fix:
proven.
2026-07-20 16:48:30 -07:00
mateo-berri
23b5b7d199 fix(vertex,azure): model-aware mid-conversation system for Claude /v1/messages
Azure AI Foundry and Vertex AI serve Claude on the first-party Anthropic
Messages contract, which was verified live to be byte-identical to
api.anthropic.com: a leading role:"system" entry in messages is rejected on
every model ("messages.0: use the top-level 'system' parameter"), and a
mid-conversation role:"system" reminder is accepted in place on Claude 4.8+/5
but 400s on Claude 4.7 and older ("role 'system' is not supported on this
model"). This is the same contract Bedrock Invoke already handles model-aware
(PRs #32578/#32831/#32882); Vertex and Azure did no hoisting at all, so a Claude
Code session on an older Vertex/Azure Claude model hard-400s on its reminder
turns, and the only thing sparing 4.8+/5 was that nothing was hoisted

Extract Bedrock's model-gated normalization into the shared
AnthropicMessagesConfig base as _normalize_system_role_messages and call it from
the Vertex and Azure messages configs. Flagged models (4.8+/5) hoist only the
leading run of system entries and keep mid-conversation reminders in place so
the top-level system prefix stays byte-identical and the prompt cache is
preserved; unflagged models hoist every system entry so the request returns a
completion instead of a 400

Add supports_mid_conversation_system to the azure_ai and vertex_ai Claude 4.8+/5
cost-map entries. Exact cost-map hits win over the claude-mid-conversation-system
fallback rule, so without the explicit flag those models would be treated as
unsupported and hoist every reminder, collapsing the prompt cache (the exact
customer regression). A per-provider test guards this so future 4.8+/5 entries
cannot silently miss the flag

Closes the Vertex/Azure gap from the customer RCA
2026-07-20 16:48:29 -07:00
tin-berri
b086cd32a6
Merge pull request #33183 from BerriAI/litellm_mcp_walker_consolidation
refactor(mcp): consolidate exception-tree walkers into one shared faults traversal
2026-07-20 16:43:26 -07:00
Yassin Kortam
e906dbe4a1
perf(streaming): build per-chunk Delta directly instead of setattr/delattr churn (#33992)
Continues #29761. Delta.__init__ set roughly ten attributes through pydantic's
__setattr__ and then deleted the five OpenAI omits on every chunk. Those keys
are extra fields (extra='allow'), so this builds __pydantic_extra__ and
__pydantic_fields_set__ directly after the parent init instead of round-tripping
each field through __setattr__/__delattr__. The resulting __dict__,
__pydantic_extra__, __pydantic_fields_set__ and model_dump output (including
exclude_unset, which the streaming path relies on) are byte-identical to the
previous behavior; a serialization-contract test locks that. A TYPE_CHECKING
block re-declares the extra attributes with their concrete types so type
checkers still see delta.content and friends.

Co-authored-by: Jay Gowdy <jgowdy@godaddy.com>
2026-07-20 16:40:43 -07:00
Tin Chi Lo
8e0d3af81b Merge origin/litellm_internal_staging into litellm_mcp_walker_consolidation
Staging now contains #33153, whose final rounds made _extract_upstream_auth_failure a thin delegate
to upstream_auth_challenge and introduced the response-level iterator this branch predates. The
resolution completes the consolidation both branches were converging on: iter_exception_tree
(faults/traversal.py) is the one tree walk, _iter_upstream_responses is rebuilt on top of it instead
of carrying a second copy of the traversal, the manager keeps the delegate, and the semantic filter
port from this branch stands. Test conflicts were append-append and both sides are kept
2026-07-20 16:29:24 -07:00
Mateo Wang
fa59cfa6da
Merge pull request #34041 from BerriAI/litellm_lit4544_shared_key_model_info_leak
fix(router): stop custom model_info leaking onto shared backend cost map key
2026-07-20 19:22:57 -04:00
tin-berri
f61e16c734
Merge pull request #32259 from BerriAI/litellm_mcp_v2_client_credentials
feat(mcp): migrate client_credentials (M2M) onto the v2 resolver arm
2026-07-20 16:22:14 -07:00
tin-berri
43e4af73f0
Merge pull request #33631 from BerriAI/litellm_lit4517_messages_mcp_gateway
feat(mcp): support MCP servers on the Anthropic /v1/messages API
2026-07-20 16:22:03 -07:00
tin-berri
f9b10eb296
Merge pull request #33886 from BerriAI/litellm_lit4582_cache_control_present
fix(anthropic): only inject cache_control when the request carries none
2026-07-20 16:20:55 -07:00
mubashir1osmani
28f012bb52
test(true_rabbit): cover passthrough headers, batch assume-role, gemini, vllm, bedrock guardrails, batch rate-limit mapping (#33843)
* test(e2e): cover passthrough headers, batch assume-role, gemini, vllm, bedrock guardrails, batch rate-limit mapping

Add parent-package e2e suites for the six feature gaps: pass-through header forwarding via /config/pass_through_endpoint, Bedrock batch STS assume-role, Gemini chat + files, hosted_vllm batch/files, Bedrock guardrail pre_call blocks (plus restored content-filter team opt-out), and OpenAI batch RPM 429 body mapping. Registry cells and LiteLLMParamsBody/TeamMetadata fields updated so markers collect cleanly.

* test(e2e): cover LIT-4587 gaps for redis, responses, tpm cache, apply_guardrail, langfuse

Adds customer-shaped live e2e for apply_guardrail, responses store+metadata TTL,
TPM excluding cached tokens, redis-backed RPM, redis circuit-breaker path,
Langfuse spend, Cohere chat, virtual-key auth, file content download, hosted_vllm
chat, and Nova Sonic realtime. Registry cells updated for the new markers.

* test(e2e): drive LIT-4587 gap suites on Anthropic to avoid Gemini quota flakes

Redis RPM, circuit-breaker path, virtual-key auth, responses metadata, and
Langfuse driver models now use Anthropic haiku so local runs stay green when
Gemini daily quota is exhausted.

* test(e2e): drop Langfuse spend suite; feature is being deprecated

Remove test_langfuse_e2e.py, logging.langfuse registry cells, and the
langfuse-only conftest driver/credentials fixtures.

* test(e2e): fold provider/batch feature tests into their endpoint suites

Keep the e2e layout endpoint- and suite-scoped instead of one file per
provider or feature

Move the virtual-key auth case into access_control/test_access_control_e2e.py
as TestVirtualKeyAuth (replacing an incomplete stub) and drop the standalone
test_virtual_key_auth_e2e.py

Fold the five per-file batch suites (file content, RPM 429 mapping, Bedrock
assume-role, Gemini files, hosted_vllm batch) into batches/test_batches_e2e.py.
The hosted_vllm batch case is skipped for now since it needs a live vLLM server
(HOSTED_VLLM_API_BASE) the e2e environment does not provision; it and the
gemini-files and RPM-mapping cases reference LIT-3382 / LIT-3266 where relevant

Merge the cohere, gemini and hosted_vllm chat cases into
llm_translation/test_chat_completions_regression_e2e.py so /chat/completions
coverage lives in one endpoint file, and repoint the coverage_registry source
fields to the new homes

Move the shared CacheControl / TextBlock / RichMessage request blocks into the
root models.py (re-exported from endpoints_client) so quota_management can use
them without a cross-suite import, which also clears the basedpyright errors in
test_tpm_excludes_cached_tokens_e2e.py; type the httpbin echo body in
test_passthrough_headers_e2e.py with a pydantic model to drop the Any-typed
json.loads path

* test(e2e): address review feedback and re-home virtual-key coverage

Replace the tautological Bedrock assume-role batch id assertion (`startswith(...)
or batch.id`, always true) with a managed-id shape check, since the unified
target_model_names path re-encodes the id rather than returning a raw ARN

Raise the batch RPM-mapping test's rpm_limit above one so the file upload can no
longer consume the key's sole request unit before batch create runs; the batch
create then clears the generic per-request limiter and the batch limiter is what
returns the "Batch rate limit exceeded" body the assertions check

Set exercised_on to [] on the pass-through header test; it drives a pass-through
endpoint, not /chat/completions

Move the virtual-key valid_allows / invalid_denied cells from other.yaml to
mgmt.yaml as mgmt.virtual_key.* so TestVirtualKeyAuth rolls up under Management,
and point its covers marker at the new ids
2026-07-20 16:15:55 -07:00
Yassin Kortam
3810130105
test(e2e): add reliability suite covering fallback, timeout, and cache behavior (#34023)
* test(e2e): add reliability suite covering fallback, timeout, and cache behavior

* test(e2e): move reliability suite under router and drive it with real deployments

* test(e2e): make the router complexity fixture opt-in so reliability tests can coexist
2026-07-20 23:06:46 +00:00
yucheng-berri
432954a2ab
fix(cache): make in-memory and disk cache increments atomic (#34013)
Some checks failed
CodSpeed Benchmarks / benchmarks (push) Waiting to run
GitHub Actions Security Analysis / zizmor (push) Waiting to run
LiteLLM Rust / rustfmt, clippy, test (push) Has been cancelled
* fix(cache): make in-memory and disk increments atomic

* refactor(cache): narrow in-memory increment lock scope

* fix(cache): address follow-up review on increment tests/types

* fix(cache): refresh atomic increment coverage

* test(cache): widen increment race window with non-zero _SlowInt seed

The zero seed was falsy, so InMemoryCache.increment_cache's `get_cache(...) or 0`
and DiskCache.get_cache's truthiness guard both discarded the _SlowInt before
__add__ could run, leaving the sleep-based window-widening inert. Seed a non-zero
value and return _SlowInt from __add__ so the sleep fires on every read-modify-write
in both backends, making the concurrency regression deterministic.

* test(cache): cover InMemoryCache.async_increment delegation

Add a focused async test asserting async_increment accumulates through the
locked sync path, exercising the previously uncovered delegation line.

---------

Co-authored-by: Emerson Gomes <emerson.gomes@thalesgroup.com>
2026-07-20 15:51:01 -07:00
mateo-berri
3f712e3fde fix(router): stop custom model_info leaking onto shared backend cost map key 2026-07-20 15:49:19 -07:00
Yassin Kortam
583ddaf199
test(e2e): cover created key appearing in /key/list inventory (#34008) 2026-07-20 22:40:39 +00:00
Yassin Kortam
c208bec37f
test(e2e): cover user deletion removing it from user inventory (#34007) 2026-07-20 22:38:32 +00:00
Yassin Kortam
6f62022e84
test(e2e): cover team deletion persistence and key revocation (#33999) 2026-07-20 22:37:40 +00:00
Yassin Kortam
5c8e7e6924
test(e2e): cover organization update persistence via /organization/info (#34010) 2026-07-20 22:36:39 +00:00
Yassin Kortam
61b906f9b6
test(e2e): cover model deletion removing it from the catalog (#34006) 2026-07-20 22:36:15 +00:00
Yassin Kortam
6db7328afb
chore(e2e): prune reliability.perf.latency.under_slo coverage cell (#34024)
It is a non-binary latency SLO threshold rather than a deterministic pass/fail
behavior a single e2e test can assert, so it does not fit the coverage registry's
one-test-per-cell contract. The registry README already flagged the perf cells for
a support-check or prune, and throughput SLO under load is covered structurally by
the Locust load suite. Removing it keeps the denominator to behaviors an e2e test
can deterministically prove.
2026-07-20 15:28:23 -07:00
Mateo Wang
885a637c6e
Merge pull request #34037 from BerriAI/litellm_fix_model_info_unpack_flake
test(proxy): make model_info endpoint tests hermetic to kill an order/merge-skew flake
2026-07-20 18:28:13 -04:00
Yassin Kortam
f21704c672
test(e2e): cover user update persistence via /user/info (#33998)
Co-authored-by: mubashir1osmani <mubashir.osmani777@gmail.com>
2026-07-20 22:18:36 +00:00
Yassin Kortam
71131190ec
test(e2e): cover model registration persistence in /model/info (#33996)
Co-authored-by: mubashir1osmani <mubashir.osmani777@gmail.com>
2026-07-20 22:17:40 +00:00
Mateo Wang
3819ee5dc0
Merge pull request #33733 from BerriAI/litellm_lit_4162_bedrock_batch_tags
feat(bedrock): forward bedrock_tags to CreateModelInvocationJob for batch jobs
2026-07-20 18:12:21 -04:00
mateo-berri
c2bd8699be fix(proxy): require admin opt-in for request-body bedrock_tags
Caller-supplied bedrock_tags land as AWS resource tags under the proxy's
AWS identity, letting an authenticated caller forge ownership or
cost-allocation labels. Add bedrock_tags to _BANNED_REQUEST_BODY_PARAMS
so per-request tags need general_settings.allow_client_side_credentials
or configurable_clientside_auth_params on the deployment, matching the
aws_bedrock_project_id precedent. Deployment-level bedrock_tags in
litellm_params are unaffected.

Also stop an explicit empty bedrock_tags list in litellm_params from
falling through to optional_params
2026-07-20 15:00:41 -07:00
Yassin Kortam
eb27447a1d
test(e2e): cover team update persistence via /team/info (#33997)
Co-authored-by: mubashir1osmani <mubashir.osmani777@gmail.com>
2026-07-20 21:56:07 +00:00
mateo-berri
249e1f8ce7 Merge remote-tracking branch 'origin/litellm_internal_staging' into litellm_lit_4162_bedrock_batch_tags
# Conflicts:
#	tests/test_litellm/test_router.py
2026-07-20 14:45:02 -07:00
Yassin Kortam
68be053e96
test(e2e): cover created user appearing in /user/list (#34016) 2026-07-20 14:29:13 -07:00
mateo-berri
44604620a4 test(proxy): make model_info endpoint tests hermetic to kill an order/merge-skew flake
The model_info / get_model_info_with_id endpoint tests drove refactored
endpoints with bare, unspec'd MagicMock routers and models. Because the
mocks were unspec'd, any attribute or method the (refactored) endpoints
newly read auto-materialized a child MagicMock, and whether that child
was reached depended on process-global state (premium_user, and the real
get_available_models_for_user chain reading litellm globals) that sibling
tests in the same xdist worker mutate. When reached, the MagicMock either
unpacked to empty (a, b = mock.method() -> 'not enough values to unpack
(expected 2, got 0)') or leaked into RouterModelInfo(**model_info) and
failed Pydantic str validation. Pass in isolation, fail under xdist.

The original TestModelInfoEndpoint failure (#33807 CI) was the same class
surfaced by merge skew: #33721 added a get_configured_token_limits unpack
to create_model_info_response, and CI's merge commit ran that against the
un-updated bare-mock test before the #33742 band-aid landed.

Fix (test-only, no product change):
- TestModelInfoEndpoint: mock the real seam (get_available_models_for_user),
  configure the router methods the endpoint actually calls, return a real
  Deployment, and drop the dead proxy_server.get_key_models/get_team_models/
  get_complete_model_list patches the refactor had stranded.
- TestGetModelInfoWithIdBlocked: spec the model mock so unset enterprise
  columns read as None instead of child MagicMocks.
- test_ProxyConfig_get_model_info_with_id_missing_model_id_raises: pin
  premium_user so the asserted AttributeError no longer flips with the
  ambient license global.
2026-07-20 14:28:09 -07:00
Yassin Kortam
4c77a5433a
test(e2e): cover created team appearing in /team/list (#34015) 2026-07-20 14:27:49 -07:00
mateo-berri
f5dc1a3010 test(router): prove request-level bedrock_tags override deployment-level tags for acreate_batch 2026-07-20 14:26:35 -07:00
Yassin Kortam
53f5a8c380
test(e2e): cover key block persisting to /key/info (#34014)
Co-authored-by: mubashir1osmani <mubashir.osmani777@gmail.com>
2026-07-20 14:26:18 -07:00
Yassin Kortam
b9c59c37cc
test(e2e): cover model update persisting to /model/info (#34017)
Co-authored-by: mubashir1osmani <mubashir.osmani777@gmail.com>
2026-07-20 21:13:54 +00:00
devin-ai-integration[bot]
0b8817afbb
perf(bedrock): audio transcription via rust core (py->rust bridge) (#33990)
* feat(bedrock): add audio transcription via Converse with py->rust bridge

Co-Authored-By: Ishaan Jaffer <155045088+ishaan-berri@users.noreply.github.com>

* fix(ci): exclude rust transcription rollout flag from docs check

Co-Authored-By: Ishaan Jaffer <155045088+ishaan-berri@users.noreply.github.com>

* fix(bedrock): await rust/python fallback in async transcription dispatch

Co-Authored-By: Ishaan Jaffer <155045088+ishaan-berri@users.noreply.github.com>

* test(bedrock): cover audio transcription rust dispatch

Co-Authored-By: Ishaan Jaffer <155045088+ishaan-berri@users.noreply.github.com>

* refactor(bedrock): route audio transcription through rust

Co-Authored-By: Ishaan Jaffer <155045088+ishaan-berri@users.noreply.github.com>

* refactor(bedrock): move rust transcription dispatch out of main

Co-Authored-By: Ishaan Jaffer <155045088+ishaan-berri@users.noreply.github.com>

* test(bedrock): include rust transcription coverage shard

Co-Authored-By: Ishaan Jaffer <155045088+ishaan-berri@users.noreply.github.com>

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Ishaan Jaffer <155045088+ishaan-berri@users.noreply.github.com>
2026-07-20 14:09:41 -07:00
Yassin Kortam
214945a223
test(e2e): cover organization deletion removing it from /organization/info (#34009)
Co-authored-by: mubashir1osmani <mubashir.osmani777@gmail.com>
2026-07-20 19:36:59 +00:00
Yassin Kortam
72be5a9bc0
test(e2e): cover tag creation persisting for spend categorization (#34018) 2026-07-20 12:24:50 -07:00
Yassin Kortam
51df801159
test(e2e): cover key regeneration rotating to a working new key (#34000) 2026-07-20 12:23:22 -07:00
Tin
d2342296ae fix(mcp): keep the minted M2M bearer authoritative over injected Authorization headers
_resolve_v2_auth dropped the resolved client_credentials auth when extra_headers
already carried Authorization (MCPJWTSigner, static_headers), so the upstream got
the injected header instead of the minted token and the one-shot 401 refetch was
lost. M2M now joins token_exchange and authorization_code in the authoritative
set; the conflicting header is dropped
2026-07-20 12:00:12 -07:00
Tin
8bfd8baab8 fix(mcp): remember the rotated M2M bearer for later requests in the session
The auth object is the httpx client's auth for the whole MCP session; after a
401 recovery it kept sending the rejected token first, burning a 401 round trip
and the single retry on every subsequent call
2026-07-20 11:54:47 -07:00
Tin
5b64239afc fix(mcp): skip the M2M cache write when the token is already expired at mint
An expires_in of zero or below computes a ttl of 0; the entry could never be
served but still occupied a slot in the bounded backend, where it could evict
a live token. The mint still serves the current request and the next get
re-fetches under the per-server lock
2026-07-20 11:54:47 -07:00
Tin Chi Lo
7705f0b975 fix(mcp): bound the M2M lock dict and cap short-lived token TTL at real expiry
Greptile P2s: the per-server lock dict now evicts its oldest entry past
max_locks so ephemeral server ids (REST tools preview) cannot grow it
unbounded, and the min-cache floor is capped at the token's actual lifetime so
an expires_in below the skew is never served past expiry
2026-07-20 11:54:47 -07:00
Tin Chi Lo
4b1c9d4498 test(mcp): update _create_mcp_client graft tests for migrated M2M arm
The graft test pinned the pre-migration contract (M2M defers to v1). Replaced
with two tests pinning the new one: a complete-config M2M server resolves via
the v2 arm into ClientCredentialsBearerAuth, and an incomplete-config server
fails closed with a 500 misconfigured naming the missing grant fields
2026-07-20 11:54:47 -07:00
Tin Chi Lo
d4035a07c7 feat(mcp): migrate client_credentials (M2M) onto the v2 resolver arm
Replaces the not_implemented stub with a live arm: ClientCredentialsTokenSource
mints and caches the M2M token (rotation-aware identity key, expires_in-driven
TTL, audience and token_endpoint_auth_method support) and
ClientCredentialsBearerAuth retries an upstream 401 exactly once with a freshly
minted token. to_server_spec owns oauth2_flow=client_credentials servers and
fails closed on incomplete grant config instead of connecting unauthenticated
2026-07-20 11:54:47 -07:00