The Five Logs Every Cron-Scheduled AI Agent Needs
The Five Logs Every Cron-Scheduled AI Agent Needs
Running AI agents on cron schedules means they execute without supervision. When something goes wrong - or quietly wastes money - you need logs that tell the full story. After months of iteration, we settled on five essential logs.
1. Action Log
What the agent actually did. Every file changed, every API called, every button clicked. This is the obvious one, and most teams get it right. But it is not enough by itself.
2. Rejection Log
What the agent decided not to do, and why. This is the log most teams skip, and it is arguably the most important one. When your agent rejects a valid task because of stale state from a previous session, the action log shows nothing - it looks like a quiet success. Only the rejection log reveals the missed opportunity.
3. Handoff Log
What the agent escalated to a human or another agent. Every handoff should include the context that triggered it, the state at the time, and what the agent expected the recipient to do. Without this, handoffs become black holes where context disappears.
4. Cost Log
Token usage, API calls, compute time - broken down per task. This is the log that exposed 40% waste in our pipeline. We discovered the agent was re-processing unchanged data on every cron run because it had no memory of previous runs. The cost log made the waste visible. The action log never would have.
5. Verification Log
Did the agent's actions produce the expected result? After completing a task, the agent should verify its own output and log whether the verification passed or failed. A file was written - does it parse correctly? An API was called - did the response confirm success?
The Pattern
These five logs together give you complete visibility into unsupervised agent behavior. Actions tell you what happened. Rejections tell you what did not happen. Handoffs track context flow. Costs track efficiency. Verification tracks correctness.
Skip any one of them and you have a blind spot that will eventually cost you.
- Monitoring AI Agent Tool Usage
- LLM Observability for Ollama Agents
- Optimized Cron Jobs - $14 to $3 Per Day
Fazm is an open source macOS AI agent. Open source on GitHub.