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docs: add Quick Install section for litellm --setup wizard#23905

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ishaan-jaff merged 2 commits intolitellm_ishaan_march_17from
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Mar 17, 2026
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docs: add Quick Install section for litellm --setup wizard#23905
ishaan-jaff merged 2 commits intolitellm_ishaan_march_17from
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Relevant issues

Adds docs for #23644 (litellm --setup interactive setup wizard + install.sh).

Changes

Adds a Quick Install (Recommended) section to the top of docker_quick_start.md showing:

  1. One-liner curl install
  2. litellm --setup demo showing the TUI wizard flow
  3. Test call against the running proxy
  4. Tip for pip users who can skip the curl step

Follows the same simple 3-step pattern as shown in the issue — install, follow wizard, make a call.

Pre-Submission Checklist

  • Docs only change, no code
  • Links to the merged PR that added the feature

Type

  • Documentation

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Project Deployment Actions Updated (UTC)
litellm Ready Ready Preview, Comment Mar 17, 2026 10:14pm

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codspeed-hq bot commented Mar 17, 2026

Merging this PR will not alter performance

✅ 16 untouched benchmarks


Comparing worktree-eager-enchanting-simon (dfc14d0) with litellm_ishaan_march_17 (6b2e56f)1

Open in CodSpeed

Footnotes

  1. No successful run was found on litellm_ishaan_march_17 (ef9cc33) during the generation of this report, so 0a18920 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report.

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greptile-apps bot commented Mar 17, 2026

Greptile Summary

This PR adds a Quick Install (Recommended) section to the top of docker_quick_start.md, documenting the new litellm --setup interactive TUI wizard and companion install.sh one-liner introduced in #23644. The section follows a clean 3-step pattern (install → follow wizard → make a call) and fits naturally above the existing pre-requisites content.

Changes:

  • New ## Quick Install section with a curl | sh one-liner, a TUI wizard walkthrough, and a test curl call
  • Trailing-whitespace cleanup on pre-existing bullet lines (cosmetic)

Review notes:

  • The Step 3 test call hardcodes model: gpt-4o; users who chose only non-OpenAI providers in the wizard will hit a routing error — a short clarifying note would help
  • After accepting the auto-generated master key in the wizard, the docs give no hint of where to find it before Step 3's <your-master-key> placeholder, which may confuse new users

Confidence Score: 4/5

  • Safe to merge — docs-only change with two minor usability gaps that don't block the feature.
  • No code is changed; the documentation is accurate and well-structured. Two style suggestions around the hardcoded gpt-4o model and the missing guidance on locating the auto-generated master key are the only gaps, neither of which is blocking.
  • No files require special attention beyond the two style comments on docs/my-website/docs/proxy/docker_quick_start.md.

Important Files Changed

Filename Overview
docs/my-website/docs/proxy/docker_quick_start.md Adds a new "Quick Install" section documenting the curl one-liner + litellm --setup TUI wizard flow. Two minor usability gaps: the Step 3 test call hardcodes gpt-4o which breaks for non-OpenAI wizard selections, and there is no guidance on locating the auto-generated master key needed for the test call.

Sequence Diagram

sequenceDiagram
    actor User
    participant Shell
    participant install.sh
    participant LiteLLM as litellm --setup (TUI)
    participant Proxy as LiteLLM Proxy (:4000)

    User->>Shell: curl -fsSL .../install.sh | sh
    Shell->>install.sh: execute
    install.sh->>Shell: pip install litellm[proxy]
    install.sh->>LiteLLM: launch wizard automatically

    Note over LiteLLM: Select providers (1=OpenAI, 2=Anthropic, …)
    User->>LiteLLM: choose providers & enter API keys
    User->>LiteLLM: set port [4000] & master key [auto-generate]
    LiteLLM->>Shell: save ./litellm_config.yaml
    LiteLLM->>User: Start the proxy now? (Y/n)
    User->>LiteLLM: Y
    LiteLLM->>Proxy: start proxy

    User->>Proxy: POST /chat/completions (Bearer <master-key>)
    Proxy-->>User: LLM response
Loading

Last reviewed commit: dfc14d0

Comment on lines +20 to +21
curl -fsSL https://raw.githubusercontent.com/BerriAI/litellm/main/scripts/install.sh | sh
```
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P0 install.sh script does not exist in the repository

The curl command references https://raw.githubusercontent.com/BerriAI/litellm/main/scripts/install.sh, but no scripts/install.sh file exists anywhere in this repository. Running this command as written will produce a 404 error, likely causing a silent failure or a confusing error message for users.

This documentation is tied to PR #23644, but that feature PR does not appear to have been merged yet — the scripts/install.sh file is absent and so is the --setup CLI flag (see the next comment). Publishing these docs before the feature lands will lead users through a broken getting-started flow.

Comment on lines +28 to +51
$ litellm --setup

Welcome to LiteLLM

Choose your LLM providers
○ 1. OpenAI GPT-4o, GPT-4o-mini, o1
○ 2. Anthropic Claude Opus, Sonnet, Haiku
○ 3. Azure OpenAI GPT-4o via Azure
○ 4. Google Gemini Gemini 2.0 Flash, 1.5 Pro
○ 5. AWS Bedrock Claude, Llama via AWS
○ 6. Ollama Local models

❯ Provider(s): 1,2

❯ OpenAI API key: sk-...
❯ Anthropic API key: sk-ant-...

❯ Port [4000]:
❯ Master key [auto-generate]:

✔ Config saved → ./litellm_config.yaml

❯ Start the proxy now? (Y/n):
```
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P0 litellm --setup flag is not implemented

The --setup CLI flag shown in this wizard demo does not exist in the codebase. Searching litellm/proxy/proxy_cli.py and every other Python file in the repo shows no --setup argument registered anywhere. Running litellm --setup will produce an "unrecognized arguments" error.

This confirms the documentation is being merged ahead of the actual feature from PR #23644. Users who follow this guide will hit an immediate failure at step 2.

Comment on lines +64 to +71
curl -X POST 'http://0.0.0.0:4000/chat/completions' \
-H 'Content-Type: application/json' \
-H 'Authorization: Bearer <your-master-key>' \
-d '{
"model": "gpt-4o",
"messages": [{"role": "user", "content": "Hello!"}]
}'
```
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P2 Test call hardcodes gpt-4o regardless of provider selection

The wizard demo in Step 2 shows the user selecting providers 1,2 (OpenAI + Anthropic), so the gpt-4o example works for that specific walkthrough. However, users who followed the wizard but only chose providers like Anthropic, Bedrock, or Gemini will immediately hit a model-routing error when they try this call.

Consider adding a note that the model name must match a provider you configured in the wizard, or change the example to reflect the wizard's demo output more explicitly (e.g. "model": "gpt-4o" # use any model you enabled in the wizard).

Comment on lines +46 to +50
❯ Master key [auto-generate]:

✔ Config saved → ./litellm_config.yaml

❯ Start the proxy now? (Y/n):
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P2 Auto-generated master key not shown to the user

The wizard TUI shows ❯ Master key [auto-generate]: and then the Step 3 curl uses Bearer <your-master-key> as a placeholder, but there is no guidance on where to find the auto-generated key after the wizard completes. Users who accepted the default will not know what value to substitute.

Consider adding a sentence after the wizard block, e.g.: "Your master key is printed at the end of the wizard and also stored in ./litellm_config.yaml under general_settings.master_key."

@ishaan-jaff ishaan-jaff changed the base branch from main to litellm_ishaan_march_17 March 17, 2026 22:15
@ishaan-jaff ishaan-jaff merged commit 6b2e56f into litellm_ishaan_march_17 Mar 17, 2026
37 of 38 checks passed
ishaan-jaff added a commit that referenced this pull request Mar 18, 2026
* feat(xai): add grok-4.20 beta 2 models with pricing (#23900)

Add three grok-4.20 beta 2 model variants from xAI:
- grok-4.20-multi-agent-beta-0309 (reasoning + multi-agent)
- grok-4.20-beta-0309-reasoning (reasoning)
- grok-4.20-beta-0309-non-reasoning

Pricing (from https://docs.x.ai/docs/models):
- Input: $2.00/1M tokens ($0.20/1M cached)
- Output: $6.00/1M tokens
- Context: 2M tokens

All variants support vision, function calling, tool choice, and web search.
Closes LIT-2171

* docs: add Quick Install section for litellm --setup wizard (#23905)

* docs: add Quick Install section for litellm --setup wizard

* docs: clarify setup wizard is for local/beginner use

* feat(setup): interactive setup wizard + install.sh (#23644)

* feat(setup): add interactive setup wizard + install.sh

Adds `litellm --setup` — a Claude Code-style TUI onboarding wizard that
guides users through provider selection, API key entry, and proxy config
generation, then optionally starts the proxy immediately.

- litellm/setup_wizard.py: wizard with ASCII art, numbered provider menu
  (OpenAI, Anthropic, Azure, Gemini, Bedrock, Ollama), API key prompts,
  port/master-key config, and litellm_config.yaml generation
- litellm/proxy/proxy_cli.py: adds --setup flag that invokes the wizard
- scripts/install.sh: curl-installable script (detect OS/Python, pip
  install litellm[proxy], launch wizard)

Usage:
  curl -fsSL https://raw.githubusercontent.com/BerriAI/litellm/main/scripts/install.sh | sh
  litellm --setup

* fix(install.sh): remove orange color, add LITELLM_BRANCH env var for branch installs

* fix(install.sh): install from git branch so --setup is available for QA

* fix(install.sh): remove stale LITELLM_BRANCH reference that caused unbound variable error

* fix(install.sh): force-reinstall from git to bypass cached PyPI version

* fix(install.sh): show pip progress bar during install

* fix(install.sh): always launch wizard via $PYTHON_BIN -m litellm, not PATH binary

* fix(install.sh): use litellm.proxy.proxy_cli module (no __main__.py exists)

* fix(install.sh): suppress RuntimeWarning from module invocation

* fix(install.sh): use Python bin-dir litellm binary to avoid CWD sys.path shadowing

* fix(install.sh): use sysconfig.get_path('scripts') to find pip-installed litellm binary

* fix(install.sh): redirect stdin from /dev/tty on exec so wizard gets terminal, not exhausted pipe

* fix(install.sh): warn about git clone duration, drop --no-cache-dir so re-runs are faster

* feat(setup_wizard): arrow-key selector, updated model names

* fix(setup_wizard): use sysconfig binary to start proxy, not python -m litellm

* feat(setup_wizard): credential validation after key entry + clear next-steps after proxy start

* style(install.sh): show git clone warning in blue

* refactor(setup_wizard): class with static methods, use check_valid_key from litellm.utils

* address greptile review: fix yaml escaping, port validation, display name collisions, tests

- setup_wizard.py: add _yaml_escape() for safe YAML embedding of API keys
- setup_wizard.py: add _styled_input() with readline ANSI ignore markers
- setup_wizard.py: change DIVIDER to _divider() fn to avoid import-time color capture
- setup_wizard.py: validate port range 1-65535, initialize before loop
- setup_wizard.py: qualify azure display names (azure-gpt-4o) to avoid collision with openai
- setup_wizard.py: work on env_copy in _build_config to avoid mutating caller's dict
- setup_wizard.py: skip model_list entries for providers with no credentials
- setup_wizard.py: prompt for azure deployment name
- setup_wizard.py: wrap os.execlp in try/except with friendly fallback
- setup_wizard.py: wrap config write in try/except OSError
- setup_wizard.py: fix _validate_and_report to use two print lines (no \r overwrite)
- setup_wizard.py: add .gitignore tip next to key storage notice
- setup_wizard.py: fix run_setup_wizard() return type annotation to None
- scripts/install.sh: drop pipefail (not supported by dash on Ubuntu when invoked as sh)
- scripts/install.sh: use litellm[proxy] from PyPI (not hardcoded dev branch)
- scripts/install.sh: guard /dev/tty read with -r check for Docker/CI compat
- scripts/install.sh: remove --force-reinstall to avoid downgrading dependencies
- tests/test_litellm/test_setup_wizard.py: 13 unit tests for _build_config and _yaml_escape

* style: black format setup_wizard.py

* fix: address remaining greptile issues - Windows compat, YAML quoting, credential flow

- guard termios/tty imports with try/except ImportError for Windows compat
- quote master_key as YAML double-quoted scalar (same as env vars)
- remove unused port param from _build_config signature
- _validate_and_report now returns the final key so re-entered creds are stored
- add test for master_key YAML quoting

* fix: add --port to suggested command, guard /dev/tty exec in install.sh

* fix: quote api_base in YAML, skip azure if no deployment, only redraw on state change

* fix: address greptile review comments

- _yaml_escape: add control character escaping (\n, \r, \t)
- test: fix tautological assertion in test_build_config_azure_no_deployment_skipped
- test: add tests for control character escaping in _yaml_escape

* feat(ui): remove Chat UI page link and banner from sidebar and playground (#23908)

* feat(guardrails): MCPJWTSigner - built-in guardrail for zero trust MCP auth (#23897)

* Allow pre_mcp_call guardrail hooks to mutate outbound MCP headers

* Enhance MCPServerManager to support hook-modified arguments and extra headers. Update tests to validate argument mutation and header injection behavior, including warnings for OpenAPI-backed servers when headers are present.

* Refactor MCPServerManager to raise HTTPException for extra headers in OpenAPI-backed servers. Update tests to reflect this change, ensuring proper exception handling instead of logging warnings.

* Allow pre_mcp_call guardrail hooks to mutate outbound MCP headers

* Enhance MCPServerManager to support hook-modified arguments and extra headers. Update tests to validate argument mutation and header injection behavior, including warnings for OpenAPI-backed servers when headers are present.

* Refactor MCPServerManager to raise HTTPException for extra headers in OpenAPI-backed servers. Update tests to reflect this change, ensuring proper exception handling instead of logging warnings.

* feat(guardrails): add MCPJWTSigner built-in guardrail for zero trust MCP auth

Signs outbound MCP tool calls with a LiteLLM-issued RS256 JWT so MCP servers
can trust a single signing authority instead of every upstream IdP.

Enable in config.yaml:
  guardrails:
    - guardrail_name: mcp-jwt-signer
      litellm_params:
        guardrail: mcp_jwt_signer
        mode: pre_mcp_call
        default_on: true

JWT carries sub (user_id), act.sub (team_id, RFC 8693), tool-level scope, iss,
aud, iat/exp/nbf. RSA-2048 keypair auto-generated at startup unless
MCP_JWT_SIGNING_KEY env var is set.

Adds /.well-known/jwks.json endpoint and jwks_uri to /.well-known/openid-configuration
so MCP servers can verify LiteLLM-issued tokens via OIDC discovery.

* Update MCPServerManager to raise HTTPException with status code 400 for extra headers in OpenAPI-backed servers. Adjust tests to verify the correct status code and exception message.

* fix: address P1 issues in MCPJWTSigner

- OpenAPI servers: warn + skip header injection instead of 500
- JWKS Cache-Control: 5min for auto-generated keys, 1h for persistent
- sub claim: fallback to apikey:{token_hash} for anonymous callers
- ttl_seconds: validate > 0 at init time

* docs: add MCP zero trust auth guide with architecture diagram

* docs: add FastMCP JWT verification guide to zero trust doc

* fix: address remaining Greptile review issues (round 2)

- mcp_server_manager: warn when hook Authorization overwrites existing header
- __init__: remove _mcp_jwt_signer_instance from __all__ (private internal)
- discoverable_endpoints: copy dict instead of mutating in-place on OIDC augmentation
- test docstring: reflect warn-and-continue behavior for OpenAPI servers
- test: update scope assertions for least-privilege (no mcp:tools/list on tool-call JWTs)

* fix: address Greptile round 3 feedback

- initialize_guardrail: validate mode='pre_mcp_call' at init time — misconfigured
  mode silently bypasses JWT injection, which is a zero-trust bypass
- _build_claims: remove duplicate inline 'import re' (module-level import already present)
- _types.py: add TODO comment explaining jwt_claims is forward-compat plumbing
  for a follow-up PR that will forward upstream IdP claims into outbound MCP JWTs

* feat(mcp_jwt_signer): add verify+re-sign, claim ops, two-token model, configurable scopes

Addresses all missing pieces from the scoping doc review:

FR-5 (Verify + re-sign): MCPJWTSigner now accepts access_token_discovery_uri
and token_introspection_endpoint.  When set, the incoming Bearer token is
extracted from raw_headers (threaded through pre_call_tool_check), verified
against the IdP's JWKS (JWT) or introspected (opaque), and only re-signed if
valid.  Falls back to user_api_key_dict.jwt_claims for LiteLLM JWT-auth mode.

FR-12 (Configurable end-user identity mapping): end_user_claim_sources
ordered list drives sub resolution — sources: token:<claim>, litellm:user_id,
litellm:email, litellm:end_user_id, litellm:team_id.

FR-13 (Claim operations): add_claims (insert-if-absent), set_claims (always
override), remove_claims (delete) applied in that order.

FR-14 (Two-token model): channel_token_audience + channel_token_ttl issue a
second JWT injected as x-mcp-channel-token: Bearer <token>.

FR-15 (Incoming claim validation): required_claims raises HTTP 403 when any
listed claim is absent; optional_claims passes listed claims from verified
token into the outbound JWT.

FR-9 (Debug headers): debug_headers: true emits x-litellm-mcp-debug with kid,
sub, iss, exp, scope.

FR-10 (Configurable scopes): allowed_scopes replaces auto-generation.  Also
fixed: tool-call JWTs no longer grant mcp:tools/list (overpermission).

P1 fixes:
- proxy/utils.py: _convert_mcp_hook_response_to_kwargs merges rather than
  replaces extra_headers, preserving headers from prior guardrails.
- mcp_server_manager.py: warns when hook injects Authorization alongside a
  server-configured authentication_token (previously silent).
- mcp_server_manager.py: pre_call_tool_check now accepts raw_headers and
  extracts incoming_bearer_token so FR-5 verification has the raw token.
- proxy/utils.py: remove stray inline import inspect inside loop (pre-existing
  lint error, now cleaned up).

Tests: 43 passing (28 new tests covering all FR flags + P1 fixes).

* feat(mcp_jwt_signer): add verify+re-sign, claim ops, two-token model, configurable scopes (core)

Remaining files from the FR implementation:

mcp_jwt_signer.py — full rewrite with all new params:
  FR-5:  access_token_discovery_uri, token_introspection_endpoint,
         verify_issuer, verify_audience + _verify_incoming_jwt(),
         _introspect_opaque_token()
  FR-12: end_user_claim_sources ordered resolution chain
  FR-13: add_claims, set_claims, remove_claims
  FR-14: channel_token_audience, channel_token_ttl → x-mcp-channel-token
  FR-15: required_claims (raises 403), optional_claims (passthrough)
  FR-9:  debug_headers → x-litellm-mcp-debug
  FR-10: allowed_scopes; tool-call JWTs no longer over-grant tools/list

mcp_server_manager.py:
  - pre_call_tool_check gains raw_headers param to extract incoming_bearer_token
  - Silent Authorization override warning fixed: now fires when server has
    authentication_token AND hook injects Authorization

tests/test_mcp_jwt_signer.py:
  28 new tests covering all FR flags + P1 fixes (43 total, all passing)

* fix(mcp_jwt_signer): address pre-landing review issues

- Remove stale TODO comment on UserAPIKeyAuth.jwt_claims — the field is
  already populated and consumed by MCPJWTSigner in the same PR
- Fix _get_oidc_discovery to only cache the OIDC discovery doc when
  jwks_uri is present; a malformed/empty doc now retries on the next
  request instead of being permanently cached until proxy restart
- Add FR-5 test coverage for _fetch_jwks (cache hit/miss),
  _get_oidc_discovery (cache/no-cache on bad doc), _verify_incoming_jwt
  (valid token, expired token), _introspect_opaque_token (active,
  inactive, no endpoint), and the end-to-end 401 hook path — 53 tests
  total, all passing

* docs(mcp_zero_trust): rewrite as use-case guide covering all new JWT signer features

Add scenario-driven sections for each new config area:
- Verify+re-sign with Okta/Azure AD (access_token_discovery_uri,
  end_user_claim_sources, token_introspection_endpoint)
- Enforcing caller attributes with required_claims / optional_claims
- Adding metadata via add_claims / set_claims / remove_claims
- Two-token model for AWS Bedrock AgentCore Gateway
  (channel_token_audience / channel_token_ttl)
- Controlling scopes with allowed_scopes
- Debugging JWT rejections with debug_headers

Update JWT claims table to reflect configurable sub (end_user_claim_sources)

* fix(mcp_jwt_signer): wire all config.yaml params through initialize_guardrail

The factory was only passing issuer/audience/ttl_seconds to MCPJWTSigner.
All FR-5/9/10/12/13/14/15 params (access_token_discovery_uri,
end_user_claim_sources, add/set/remove_claims, channel_token_audience,
required/optional_claims, debug_headers, allowed_scopes, etc.) were
silently dropped, making every advertised advanced feature non-functional
when loaded from config.yaml.

Add regression test that asserts every param is wired through correctly.

* docs(mcp_zero_trust): add hero image

* docs(mcp_zero_trust): apply Linear-style edits

- Lead with the problem (unsigned direct calls bypass access controls)
- Shorter statement section headers instead of question-form headers
- Move diagram/OIDC discovery block after the reader is bought in
- Add 'read further only if you need to' callout after basic setup
- Two-token section now opens from the user problem not product jargon
- Add concrete 403 error response example in required_claims section
- Debug section opens from the symptom (MCP server returning 401)
- Lowercase claims reference header for consistency

* fix(mcp_jwt_signer): fix algorithm confusion attack + add OIDC discovery 24h TTL

- Remove alg from unverified JWT header; use signing_jwk.algorithm_name from JWKS key instead.
  Reading alg from attacker-controlled headers enables alg:none / HS256 confusion attacks.
- Add _oidc_discovery_fetched_at timestamp and _OIDC_DISCOVERY_TTL = 86400 (24h).
  Without a TTL the cached discovery doc never refreshes, so IdP key rotation is invisible.

---------

Co-authored-by: Noah Nistler <60981020+noahnistler@users.noreply.github.com>

* fix(ci): stabilize CI - formatting, type errors, test polling, security CVEs, router bug, batch resolution

Fix 1: Run Black formatter on 35 files
Fix 2: Fix MyPy type errors:
  - setup_wizard.py: add type annotation for 'selected' set variable
  - user_api_key_auth.py: remove redundant type annotation on jwt_claims reassignment
Fix 3: Fix spend accuracy test burst 2 polling to wait for expected total
  spend instead of just 'any increase' from burst 2
Fix 4: Bump Next.js 16.1.6 -> 16.1.7 to fix CVE-2026-27978, CVE-2026-27979,
  CVE-2026-27980, CVE-2026-29057
Fix 5: Fix router _pre_call_checks model variable being overwritten inside
  loop, causing wrong model lookups on subsequent deployments. Use local
  _deployment_model variable instead.
Fix 6: Add missing resolve_output_file_ids_to_unified call in batch retrieve
  non-terminal-to-terminal path (matching the terminal path behavior)

Co-authored-by: Ishaan Jaff <ishaan-jaff@users.noreply.github.com>

* chore: regenerate poetry.lock to sync with pyproject.toml

Co-authored-by: Ishaan Jaff <ishaan-jaff@users.noreply.github.com>

* fix: format merged files from main and regenerate poetry.lock

Co-authored-by: Ishaan Jaff <ishaan-jaff@users.noreply.github.com>

* fix(mypy): annotate jwt_claims as Optional[dict] to fix type incompatibility

Co-authored-by: Ishaan Jaff <ishaan-jaff@users.noreply.github.com>

* fix(ci): update router region test to use gpt-4.1-mini (fix flaky model lookup)

Replace deprecated gpt-3.5-turbo-1106 with gpt-4.1-mini + mock_response in
test_router_region_pre_call_check, following the same pattern used in commit
717d37c for test_router_context_window_check_pre_call_check_out_group.

Co-authored-by: Ishaan Jaff <ishaan-jaff@users.noreply.github.com>

* ci: retry flaky logging_testing (async event loop race condition)

Co-authored-by: Ishaan Jaff <ishaan-jaff@users.noreply.github.com>

* fix(ci): aggregate all mock calls in langfuse e2e test to fix race condition

The _verify_langfuse_call helper only inspected the last mock call
(mock_post.call_args), but the Langfuse SDK may split trace-create and
generation-create events across separate HTTP flush cycles. This caused
an IndexError when the last call's batch contained only one event type.

Fix: iterate over mock_post.call_args_list to collect batch items from
ALL calls. Also add a safety assertion after filtering by trace_id and
mark all langfuse e2e tests with @pytest.mark.flaky(retries=3) as an
extra safety net for any residual timing issues.

Co-authored-by: Ishaan Jaff <ishaan-jaff@users.noreply.github.com>

* fix(ci): black formatting + update OpenAPI compliance tests for spec changes

- Apply Black 26.x formatting to litellm_logging.py (parenthesized style)
- Update test_input_types_match_spec to follow $ref to InteractionsInput schema
  (Google updated their OpenAPI spec to use $ref instead of inline oneOf)
- Update test_content_schema_uses_discriminator to handle discriminator without
  explicit mapping (Google removed the mapping key from Content discriminator)

Co-authored-by: Ishaan Jaff <ishaan-jaff@users.noreply.github.com>

* revert: undo incorrect Black 26.x formatting on litellm_logging.py

The file was correctly formatted for Black 23.12.1 (the version pinned
in pyproject.toml). The previous commit applied Black 26.x formatting
which was incompatible with the CI's Black version.

Co-authored-by: Ishaan Jaff <ishaan-jaff@users.noreply.github.com>

* fix(ci): deduplicate and sort langfuse batch events after aggregation

The Langfuse SDK may send the same event (e.g., trace-create) in
multiple flush cycles, causing duplicates when we aggregate from all
mock calls. After filtering by trace_id, deduplicate by keeping only
the first event of each type, then sort to ensure trace-create is at
index 0 and generation-create at index 1.

Co-authored-by: Ishaan Jaff <ishaan-jaff@users.noreply.github.com>

---------

Co-authored-by: Noah Nistler <60981020+noahnistler@users.noreply.github.com>
Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: Ishaan Jaff <ishaan-jaff@users.noreply.github.com>
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