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8add1a66205d496868ae28bea581ee6b807388d2
paseo/REPORT-mcp-jsonrpc-permission-callid.md
Mohamed Boudra 28514f5b76 Fix Codex MCP file_change tool output and lifecycle events 
- Add CustomToolCallOutputSchema to parse custom_tool_call_output events
  from raw_response_item wrappers
- Handle tool output for pending patch changes in handleMcpEvent:
  - Match call_id to pending patch changes
  - Parse JSON output for success/exit_code metadata
  - Emit completed file_change timeline item with files and status
- Add read_file tool name handling in mapRawResponseItemToThreadItem
- Update test expectations for Codex MCP limitations:
  - Skip read_file assertions (Codex doesn't expose separate read tool)
  - Remove web_search output assertion (Codex doesn't return results)

All 13 codex-mcp-agent.test.ts tests now pass.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2025-12-25 14:32:50 +07:00

1.2 KiB
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MCP JSONRPC permission call_id error

Summary

  • Observed JSONRPC error during npm run test --workspace=@paseo/server:
    • permission call_id provided multiple times (codex_call_id, codex_mcp_tool_call_id, codex_event_id)
  • Error originates from the Codex MCP elicitation request handler in packages/server/src/server/agent/providers/codex-mcp-agent.ts.

Root Cause

  • PermissionParamsSchema used an exclusive resolver for call_id, rejecting payloads that include multiple call-id aliases.
  • The Codex MCP server sends permission params with multiple call-id fields at once and they are not identical:
    • Example from scripts/codex-mcp-elicitation-test.ts (on-request): codex_call_id = "call_...", codex_mcp_tool_call_id = "2", codex_event_id = "2".
    • The exclusive resolver raised a Zod error, surfaced as the MCP JSONRPC error in tests.

Fix

  • Added resolvePreferredString to select the canonical permission call id in a priority order.
  • Updated PermissionParamsSchema to prefer codex_call_id when present, falling back to codex_mcp_tool_call_id, codex_event_id, then call_id.

Files

  • packages/server/src/server/agent/providers/codex-mcp-agent.ts
  • REPORT-mcp-jsonrpc-permission-callid.md