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04cc8aab67
* fix(cache): fold the response output contract into the semantic cache signature
The signature hashed only {model, messages, temperature, top_p}, so two temp=0
requests with identical messages but different response_format shared a cache
key: the second was served the first's stored body under a 200, violating the
schema it asked for. tools/tool_choice had the same exposure.
generateSignature now takes an optional output contract — response_format,
text.format, tools, tool_choice, collected by outputContractOf() — and folds it
into the digest only when present, so plain-chat signatures (and every cache
entry already written for them) are unchanged. All three call sites pass it;
read/write symmetry is preserved because bodyForCacheWrite snapshots the same
body object the read path hashed (#cache-signature-asymmetry).
Closes #12307
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
* docs(changelog): add fragment for #12307 semantic-cache output-contract fix
Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>
* fix(cache): populate both constraint spellings in outputContractOf
The merge with #12734 left generateSignature reading the camelCase
constraints (toolChoice/responseFormat) with a snake_case fallback, but
outputContractOf only filled the snake_case keys, so the #12734
"signature is called with tool_choice/tools/response_format from body"
store tests failed on the merged branch. Set both spellings so either
caller shape reads the value it expects.
Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>
---------
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>
Co-authored-by: amirrezakm <amirrezakm@users.noreply.github.com>