Site L1773: cache.create block in _send_gemini had multiple global side
effects (sets _gemini_cache, _gemini_cache_created_at, _gemini_cached_file_paths,
returns chat_config with cached_content). Except body reset globals on failure.
Per TIER1_REVIEW: logging is NOT a drain. MIGRATE to Result[Any].
New helper _create_gemini_cache_result(sys_instr, tools_decl, file_items) -> Result[Any]:
- Returns Result(data=chat_config) on SDK success (sets globals, logs [CACHE CREATED])
- Returns Result(data=None, errors=[ErrorInfo]) on SDK failure (resets globals,
logs [CACHE FAILED])
- Preserves original semantics: globals set on success, reset on failure
Caller:
cached_config_result = _create_gemini_cache_result(sys_instr, tools_decl, file_items)
if cached_config_result.ok:
chat_config = cached_config_result.data
Audit: ai_client BC 5 -> 4. _send_gemini cache-related BC sites all migrated.
