* feat(decisions): add unified /v1/decisions endpoint for Jev-compatible providers (#44236)
Backport of #44236 to rc/1.105.0.
Cherry-picked from 8b1990b4bc (main).
* feat(decisions): serve System One format at /v1/systemone and OpenAI format at /v1/decisions
Backport of #45184 to rc/1.105.0.
Cherry-picked from 3339469e73 (litellm_systemone_endpoint). The playground System One tab is not on this line, so its UI hunks are dropped.
* fix(decisions): import assert_never from typing_extensions for Python 3.10
Backport of the #45184 follow-up to rc/1.105.0.
Cherry-picked from 29e715473c (litellm_systemone_endpoint).
* fix(decisions): cap OpenAI-format questions at the System One limit
Backport of the #45184 follow-up to rc/1.105.0.
Cherry-picked from 7ef132947a (litellm_systemone_endpoint).
* fix(decisions): return 400 for bodies that are not JSON
Backport of the #45184 follow-up to rc/1.105.0.
Cherry-picked from b6bb885324 (litellm_systemone_endpoint).
* test(decisions): send System One bodies to /v1/systemone in integration tests
Backport of the #45184 follow-up to rc/1.105.0.
Cherry-picked from 77872f6cda (litellm_systemone_endpoint).
* feat(decisions): add OpenAI as a Decisions provider
System One requests to openai/ models are translated to OpenAI's Decisions shape on the way out and OpenAI's answers are translated back, so both /v1/systemone and /v1/decisions can route to gpt-6-luna.
(cherry picked from commit b94bbbc318)
* refactor(decisions): move the OpenAI wire translation into llms/openai
(cherry picked from commit d209a85076)
* feat(decisions): route both request formats through a shared decisions IR
System One and OpenAI-format bodies now convert to one internal representation, and each provider translates it to its own wire format. OpenAI deployments receive the caller's messages, images, names, typed choice values, level descriptions and safety_identifier unchanged. System One providers return a 400 for image input. Cached and cache-write tokens are priced on both response shapes, and provider response extras survive the round trip.
(cherry picked from commit 0dd207fde1)
* fix(decisions): keep provider fields inside System One answers
(cherry picked from commit 1348de864f)
* fix(decisions): load on Python 3.10 and 3.11 and bill cached tokens once under custom pricing
Decisions IR dataclasses used a mappingproxy default, which is only hashable from Python 3.12, so import litellm failed on 3.10 and 3.11. Decisions usage now reaches cost_per_token as a Usage with prompt_tokens_details, so custom pricing no longer adds cached and cache-write tokens on top of input_tokens that already include them
(cherry picked from commit 39012f1c22)
* fix(decisions): honor litellm OpenAI key and base settings for the openai provider
OpenAI decisions now resolve the key from litellm.api_key, litellm.openai_key, then OPENAI_API_KEY, and the base from litellm.api_base, OPENAI_BASE_URL, then OPENAI_API_BASE, matching other OpenAI calls. Providers own their configured key and base lookup through the endpoint config.
(cherry picked from commit e465919004)
* test(decisions): clear every OpenAI base setting in the proxy OpenAI deployment test
(cherry picked from commit a2951b318d)
* fix(decisions): send OpenAI instructions for System One questions without them and reject single-option questions
(cherry picked from commit e4081f77c6)
* fix(decisions): return guardrail_information on OpenAI-format decisions when requested
Backport of the #45184 and #45214 guardrail fix.
Cherry-picked from 855f0bb765 (litellm_systemone_endpoint) as merged into #45214 at c19ada66ed (litellm_openai_decisions_provider).
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Co-authored-by: devin-ai-integration[bot] <158243242+devin-ai-integration[bot]@users.noreply.github.com>
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