Pi outputs the model list to stderr instead of stdout. This fix checks
stderr first and falls back to stdout for compatibility with older
versions.
Fixes model discovery returning empty arrays and environment tests
failing with 'Pi returned no models' error.
Major improvements to the Pi local adapter:
Bug Fixes (Greptile-identified):
- Fix string interpolation in models.ts error message (was showing literal ${detail})
- Fix tool matching in parse.ts to use toolCallId instead of toolName for correct
multi-call handling and result assignment
- Fix dead code in execute.ts by tracking instructionsReadFailed flag
Feature Improvements:
- Switch from print mode (-p) to RPC mode (--mode rpc) to prevent agent from
exiting prematurely and ensure proper lifecycle completion
- Add stdin command sending via JSON-RPC format for prompt delivery
- Add line buffering in execute.ts to handle partial JSON chunks correctly
- Filter RPC protocol messages (response, extension_ui_request, etc.) from transcript
Cost Tracking:
- Extract cost and usage data from turn_end assistant messages
- Support both Pi format (input/output/cacheRead/cost.total) and generic format
- Add tests for cost extraction and accumulation across multiple turns
All tests pass (12/12), typecheck clean, server builds successfully.
