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OmniRoute/tests
Markus Hartung 1f7c9a9cb2 fix(responses-api): fold in #9183's index-collision, truncation, and reasoning-replay fixes
Closed #9183 in favor of this branch at the operator's request. Folds in
the exact PR diff (verified byte-identical via `gh pr diff 9183`, applied
cleanly with `git apply`):

- Fixed output_index collisions between reasoning/message/tool-call items
  in Responses API streaming, which caused clients to ignore tool calls.
- Fixed a race in chunk processing where tool calls and finish signals
  were lost when they arrived in the same chunk as reasoning/text content.
- Enabled full processing of multi-choice chunks (previously truncated to
  a single choice).
- Added reasoning_content capture/replay for DeepSeek-based models
  (big-pickle), keyed off the real position in the next turn's replayed
  messages array instead of a hardcoded index 0 — prevents history
  corruption that caused models to lose context and stop prematurely.
- Added big-pickle to models recognized for native textual reasoning tags
  so <think> blocks convert to reasoning items correctly.
- Improved Responses-to-Chat translation to group reasoning, content, and
  tool calls into a single assistant turn, as strict OpenAI-compatible
  upstreams require.
- Added a descriptive placeholder for encrypted Responses API reasoning
  blocks so downgraded Chat API requests keep context.

Test plan:
- All 82 tests across reasoning-cache.test.ts, translator-helper-branches.test.ts,
  translator-request-openai-responses.test.ts, and the 3 new test files
  (responses-api-truncation.test.ts, responses-replay-fixes.test.ts,
  responses-request-translation.test.ts) pass
- npm run typecheck:core — clean
- npm run check:file-size — chatCore.ts (5024->5032) and
  translator/response/openai-responses.ts (1174->1180) rebaselined,
  both cohesive additions at the two reasoning-cache capture call sites and
  the turn-grouping fix; tests/unit/reasoning-cache.test.ts rebaselined at
  1035 (crosses the 1000-line new-file test cap, entirely this fold's diff)
2026-08-05 12:08:03 +02:00
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