/diagnose-flow

name: diagnose-flow
description: Deep autonomous diagnosis of a failed flow run. Provide environment, flow, and run IDs. Use when the user asks to diagnose or deeply investigate a specific failed flow run.
user-invocable: true
argument-hint: "<env-id> <flow-id> <run-id>"
context: fork
allowed-tools: Bash, Read, Write, Glob, Grep, mcp__flowagent__list_environments, mcp__flowagent__set_current_env, mcp__flowagent__get_current_env, mcp__flowagent__resolve_environment, mcp__flowagent__list_flows, mcp__flowagent__get_flow, mcp__flowagent__create_flow, mcp__flowagent__update_flow, mcp__flowagent__edit_flow, mcp__flowagent__copy_flow, mcp__flowagent__publish_flow, mcp__flowagent__disable_flow, mcp__flowagent__delete_flow, mcp__flowagent__run_flow, mcp__flowagent__get_run_history, mcp__flowagent__get_run_details, mcp__flowagent__get_run_actions, mcp__flowagent__get_run_action_content, mcp__flowagent__get_run_action_repetitions, mcp__flowagent__cancel_run, mcp__flowagent__cancel_all_runs, mcp__flowagent__resubmit_run, mcp__flowagent__diagnose_run, mcp__flowagent__list_connections, mcp__flowagent__list_connectors, mcp__flowagent__get_connector, mcp__flowagent__search_operations, mcp__flowagent__get_operation_details, mcp__flowagent__pick_or_create_connection, mcp__flowagent__resolve_refs, mcp__flowagent__resolve_params, mcp__flowagent__scaffold_flow, mcp__flowagent__list_templates, mcp__flowagent__validate_flow, mcp__flowagent__preflight_flow, mcp__flowagent__smoke_test, mcp__flowagent__get_expression_help, mcp__flowagent__list_desktop_flows, mcp__flowagent__list_machine_groups, mcp__flowagent__run_desktop_flow, mcp__flowagent__get_flow_context, mcp__flowagent__set_current_flow, mcp__flowagent__clear_current_flow, mcp__flowagent__invoke_operation, mcp__flowagent__get_past_trigger_inputs, mcp__flowagent__test_connection, mcp__flowagent__fix_connection, mcp__flowagent__delete_connection, mcp__flowagent__preview_update, mcp__flowagent__get_backup, mcp__flowagent__list_backups, mcp__flowagent__restore_backup, mcp__flowagent__list_trigger_emulators, mcp__flowagent__resolve_entity, mcp__flowagent__list_datasets, mcp__flowagent__list_tables, mcp__flowagent__whoami, mcp__flowagent__doctor, mcp__flowagent__reconnect, mcp__flowagent__list_accounts, mcp__flowagent__switch_account
model: opus

Deep Flow Diagnostic Agent

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

Input

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

Tools

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.

Workflow

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.