### Summary When an RC API call triggers a panic (recovered by the job runner), the full Go stack trace is included in the JSON error response. This leaks internal file paths, Go module versions, goroutine state, and memory addresses to the API caller. ### Details The panic recovery in `fs/rc/jobs/job.go:110-115`: ```go func (j *Job) run(ctx context.Context, fn rc.Func, in rc.Params) { defer func() { if r := recover(); r != nil { j.mu.Lock() j.EndTime = ti