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odysseus/tests
Giuseppe 6d511f6e66 fix(llm): auto-detect <think> in content stream for unregistered thinking models (#2588)
* fix(llm): auto-detect <think> in content stream for unregistered thinking models

_THINKING_MODEL_PATTERNS only covers known model families by name. Qwen3-derived
models with non-standard names (e.g. Qwopus, custom QwQ forks) are not matched,
so their <think>...</think> content streams through as visible chat text instead
of being routed to the thinking display.

When the first content delta opens with <think> and the model was not already
identified as a thinking model, dynamically flag the stream as a thinking model
for the remainder of the response. This enables the existing </think> repair path
(line below) and ensures the frontend receives the full <think>...</think> wrapper
it needs to split thinking from the final answer.

The check is restricted to the very first content delta (_first_content_sent is
False) to avoid misidentifying models that happen to write "<think>" mid-answer.

Fixes #2225
Related: #2420 (covered by separate PR from @AmmarS-Analyst), #2224 (@RaresKeY)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(llm): replace inert _thinking_model flag with _in_think_tag state machine

The original auto-detect set _thinking_model=True on the first <think> chunk
but still emitted it as a regular delta and set _first_content_sent=True
immediately, so no subsequent chunk could enter the repair path.

Replace with _in_think_tag bool: enter thinking mode when first content starts
with <think>, route all chunks to the thinking channel until </think> is found,
then the tail becomes the first regular delta. Adds three regression tests.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(llm): replace _first_content_sent guard with _think_open_stripped

Opening-tag stripping used `not _first_content_sent` as the guard, but
_first_content_sent stays False throughout the entire think block (it only
flips when regular content is emitted). So `find(">")` ran on every
reasoning chunk — not just the first — and silently truncated everything
before the first ">" in any reasoning text containing comparisons, arrows,
or code.

Fix: add `_think_open_stripped = False` alongside `_in_think_tag`. Use it
as the strip guard in both the "still inside <think>" path and the
"</think> found in same chunk" split path. Set it True once the opening
tag is consumed so all subsequent chunks reach the thinking channel
unmolested.

Add regression test: 3-chunk stream where the middle chunk contains
"c > d" — confirms "more c " is not dropped.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-06-04 20:18:19 +02:00
..
2026-05-31 23:58:26 +09:00
2026-06-01 02:22:17 +00:00
2026-05-31 23:58:26 +09:00