- Extracted internal handlers and logic from AgentSession into dedicated runner, guard, and coordinator modules.
- Created standalone modules for bash execution, evaluation runners, IRC bridging, and prewalk coordination.
- Established dedicated session components for tracking stats, todos, streams, and retry fallback chains.
- Preserved existing session behavior while significantly reducing monolithic class size and complexity.
The agent_end handler only recorded stopReason/provider/model at debug and dropped errorMessage/errorStatus/errorId, so a session dying repeatedly on provider stream failures left no actionable trace in the main log. Extract logProviderTurnError and emit one warn-level entry carrying provider, model, errorMessage, errorStatus, and errorId when a turn ends in stopReason:error.
Fixes#6177
can1357