Trace Execution

Follow the path from the entry point through:

• routes and mounted Grape APIs
• controllers/endpoints
• service or command objects
• models and queries
• jobs, broadcasts, and cache writes

Write the trace as a short step-by-step chain with file paths.

Agent Dispatch

This is a skill (/rb:trace), not an agent. Do NOT spawn rb-trace or rb:trace via the Agent tool. For agent-based deep tracing, use call-tracer (subagent_type: "ruby-grape-rails:call-tracer").