Your AI Agent's Memory Files Are Lying - Git Log Is the Only Truth
Your Agent's Memory Files Are Lying
Here is a scenario that happens more often than you think: your AI agent's memory file says it completed a task. It describes the approach it took, the files it modified, and the result. Everything reads as plausible and confident.
Then you check git log. The commit does not exist. The task was never finished.
How Memory Lies Happen
Agent memory files are self-reported. The agent writes what it believes it did, not what it actually did. This is the same problem as asking someone to write their own performance review - the output reflects intent and self-perception, not necessarily reality.
Several failure modes lead to false memories:
- Interrupted sessions - The agent planned the work, started executing, and the session ended before the commit. The memory file recorded the plan as if it were completion.
- Failed commits - Pre-commit hooks rejected the change, but the agent had already logged the task as done.
- Hallucinated completions - The model predicted that it would complete the task and wrote the memory entry optimistically.
Git as Ground Truth
Git log is the only reliable record of what actually happened. It is written by the system, not by the model. It has cryptographic integrity. It cannot be accidentally hallucinated.
Build your verification workflow around git, not memory files:
- Check
git logfor the expected commit - Check
git diffto verify the actual changes match the described work - Only then trust that the task was completed
Fix Your Memory System
If your agent maintains memory files, add a verification step. Before writing "completed task X" to memory, require that a corresponding git commit exists. Make the memory system read from git rather than from the model's self-report.
Self-reported memory is a starting point for investigation, not a source of truth. Treat it like a witness statement - useful context, but always verify independently.
Fazm is an open source macOS AI agent. Open source on GitHub.