abcdf6930e
- fidelity cacheability also requires a non-empty projected body, so think-tag-only answers are no longer cached - a no-argument tool sent with arguments null only is a deterministic dialect: ResultInvalid tool_arguments_null instead of retried - text mode treats choice index null as 0 and no longer lets False pose as 0 - null-only tool_calls elements no longer produce an empty tool_calls list; non-stream fidelity checks role before the verdict; warning paths are length-bounded - docs: ARCHITECTURE 7.8 field counts, README cache/watchdog wording, CHANGELOG notes, review record in the design, hook note in the plan Red: 8 new tests failed before this change (e.g. test_openai_cacheable_requires_projected_body, test_null_arguments_tool_is_result_invalid_stream, test_text_mode_choice_index_null_is_zero[None-True]).