[xz-dev]

Summary

• translate OpenAI-compatible delta.reasoning into standard streaming Responses reasoning events while preserving reasoning_content precedence
• expose streamed reasoning through the native Ollama endpoint as message.thinking
• make OmniRoute's registry authoritative for GPT-OSS reasoning tiers (low, medium, high) and preserve those tiers through catalog/VS Code metadata
• verify Responses-to-Chat effort forwarding for all advertised GPT-OSS levels

Tests

• node --import tsx/esm --test tests/unit/responses-transformer.test.ts tests/unit/translator-resp-openai-responses.test.ts tests/unit/ollama-transform.test.ts tests/unit/openai-responses-reasoning-effort.test.ts — 47 passed
• tokenized VS Code catalog plus existing combo regressions — 38 passed
• npm run typecheck:core
• focused ESLint and Prettier checks for changed files
• npm run check:file-size
• npm run check:complexity
• git diff --check

Baseline notes

• npm run test:unit:fast fails identically on the untouched base and this branch under Node 26.3.0 because Next throws Invariant: AsyncLocalStorage accessed in runtime where it is not available.
• src/app/api/v1/models/catalog.ts has an existing no-restricted-imports finding at line 3 on both the untouched base and this branch; all other changed files pass focused ESLint.

[diegosouzapw]

Merged via local merge-train on 192.168.0.113 (32 cores) @ train tip 1efacead211f446aac3146c0599eca1ca190ac4c — log /srv/omniroute-train/.claude/worktrees/train-20260804-130726-suite.log.

Green: typecheck:core, check-complexity, check-cognitive-complexity, check-changelog-integrity, test:vitest.

test:unit: 15 failures, and every one of them reproduces identically on the clean release tip with zero PRs boarded (merge-gates §3) — no new failure was introduced by this train. Thirteen are the bare-model routing assertions left stale by #9275, which intentionally moved bare gpt-5.5/gpt-5.6-sol to codex without updating the tests that encoded the old destination; two are the trailing-period message change covered by #9392. A fix for those is in flight.

For reference, check-file-size is also a pre-existing base-red on the bare tip (src/sse/handlers/chat.ts 1846>1845, open-sse/executors/base.ts 1623>1578 — identical numbers with no PRs boarded): baseline drift for the release captain, not introduced here.