Summary

• isRenderablePayload() did not check the isError flag on payloads
• Internal error results (context overflow, tool failures, role ordering conflicts) were being sent to users on all messaging channels
• These errors are meant to stay in the agent context for self-correction, not be delivered to end users

Changes

• Added early return in isRenderablePayload() when payload.isError is true
• Added test coverage for isRenderablePayload covering all payload types and the isError filtering

Fixes #17828

Greptile Summary

Prevents internal error messages from being sent to end users by filtering out error payloads. The fix adds an early return in isRenderablePayload() to check the isError flag, ensuring that context overflow errors, tool failures, and role ordering conflicts stay in the agent context for self-correction rather than being delivered on messaging channels.

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The fix is a simple, well-tested guard clause that prevents a clear bug (error messages leaking to users). The change is minimal, isolated to a single function, and includes comprehensive test coverage. No edge cases or regressions identified.
• No files require special attention

_{Last reviewed commit: b981813}