fix(mypy-cleanup): part-01 resolve meta reference agent type issues (126 errors) #3945
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- Add proper type annotations using Any where needed - Fix union-attr errors with getattr and walrus operator - Fix arg-type errors for datetime/enum conversions - Add type: ignore for list invariance issues - Remove event variable reuse to satisfy type checker - Use proper type narrowing for tool execution paths Patterns established: - Use getattr() with walrus operator for optional attributes - Use type: ignore for runtime-correct but mypy-incompatible cases - Separate event variables by type to avoid union conflicts
Fixed 35 errors, 46 remaining: - Add isinstance() checks for union type discrimination - Fix list type annotations for Message types - Convert strings to datetime/StepType where needed - Use assert to narrow AgentTurnCreateRequest vs AgentTurnResumeRequest - Add explicit type annotations to avoid inference issues Still to fix: - Remaining str to datetime/StepType conversions - Optional list handling for shields - Type annotations for tool maps - List variance issues for input_messages - Fix turn_id variable redefinition
- Add None checks for optional shield and client_tools lists - Convert StepType.X.value to StepType.X enum values - Convert ISO timestamp strings to datetime objects - Add type annotations (output_attachments, tool_name_to_def) - Fix union type discrimination with isinstance checks - Fix max_infer_iters optional comparison - Filter tool_calls to exclude strings, keep only ToolCall objects - Fix identifier handling for BuiltinTool enum conversion - Fix Attachment API parameter (url → content) - Add type: ignore for OpenAI response format compatibility Fixes all 81 mypy errors in agent_instance.py. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
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Error fixes in Agents implementation (
meta-referenceprovider) -- adding proper type annotations and using type narrowing for optional attributes. Essentially a bunch ofif x and x_foo := getattr(x, "foo")instead ofx.foodirectlyPart of ongoing mypy remediation effort.