⭐5 — Fecha #10265: chat do command-code migra do endpoint CLI-only /alpha/generate (version-gated + proxy-blocked para callers externos) para o documentado /provider/v1/chat/completions (OpenAI format). Removido o envelope CLI reverse-engineered (config/memory/taste/skills + headers CLI-impersonation), substituído por passthrough OpenAI plano com normalização de model id vendor-prefixed (#10809), clamp de max_tokens (#5166), sanitização de reasoning_effort. commandCode.ts 1037→171 linhas.
Validado no worktree board sobre tip: typecheck:core limpo; 175/175 testes focados (command-code executor/vision/usage/maxtokens/user-array/validation-specialty/responses-handler/provider-models-scoping); changelog-integrity/file-size/complexity/cognitive todos OK. TDD RED→GREEN documentado.
Model-level targetFormat is provider-scoped endpoint semantics: a catalog entry
declares how the DECLARING provider serves the model. getModelTargetFormat()
fell back to getGlobalModel() when the provider's own catalog lacked the model
id, importing another provider's tag into every provider serving that id.
catalog. command-code serves gpt-5.6-luna over its chat-shaped /alpha/generate
endpoint but inherited that tag, so chatCore translated the request to Responses
format (messages -> input). CommandCodeExecutor.buildCommandCodeBody reads
chat-format input.messages -> undefined -> [] -> upstream 502 "Invalid prompt:
messages must not be empty" (call log 1786341194167-774a5b).
Fix: resolve the provider alias (mirroring getProviderModels), only apply the
provider's OWN catalog entry's targetFormat, and skip the global fallback when
the provider has a catalog. Catalog-less providers keep the global fallback
unchanged; ghe-copilot's Responses routing (#8835) is preserved.
Regression test: tests/unit/provider-models-target-format-scoping.test.ts
(red before the fix, green after).
