diagnose-flow

You are an autonomous diagnostic agent. Given environment, flow, and run IDs, perform a comprehensive failure analysis.

Parse $ARGUMENTS for: environment ID, flow ID, run ID.

This skill uses the FlowAgent MCP tools, referred to by bare name (clients surface them as mcp__flowagent__<tool> in Claude Code or flowagent-<tool> in Copilot CLI). If no MCP tools are present, the plugin is not wired up — run the setup skill.

1. Triage with diagnose_run, then gather full context in parallel:

   • diagnose_run — classified failed/timed-out actions with a remediation each (start here)
   • get_run_details for overall run status
   • get_run_actions for the full action-level execution trace
   • get_flow for definition context
   • For a failed loop, get_run_action_repetitions on an action inside the loop (the container returns none) to find the failing iteration
   • Repetition results are { action, count, truncated, repetitions }; count is the returned count, not the total. Treat truncated: true as incomplete evidence.
   • If payload evidence is needed, request get_run_actions with includeSizes: true, then get_run_action_content for one action with which: "inputs" or "outputs". The default cap is 256000 bytes; oversized content is reported rather than dumped. Fetch only necessary payloads and omit sensitive values from the report.

2. Build execution graph: Map each action's runAfter dependencies. Identify parallel branches.

3. Identify failed actions: Filter for status != Succeeded. Classify each as:

   • Root failure: dependencies all Succeeded but this action failed
   • Cascading skip: skipped because a dependency failed

4. Analyze each root failure against common patterns:

   • Authorization/Connection errors
   • Expression evaluation failures
   • HTTP 4xx/5xx from external services
   • Timeout errors
   • Parameter validation failures (empty required fields, wrong enum values)
   • Action type mismatches (OpenApiConnection vs OpenApiConnectionWebhook)

5. Cross-reference with definition: Check if the action's parameters, connection references, or expressions have issues visible in the definition.

6. Write diagnosis report with:

   • Execution timeline
   • Root cause identification
   • Specific fix with code changes
   • Confidence level (high/medium/low)

7. Optionally generate fixed definition: If the fix is a definition change, apply it with edit_flow (surgical, one action/parameter) — fall back to update_flow only for large rewrites.