Yoetz
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What is Yoetz?
Yoetz is an open-source verification tool that checks whether AI coding agents (Codex, Claude Code, Cursor) actually completed the tasks they claim to be done. It keeps two records — what the agent says it did and what it actually did — compares them locally via MCP and hooks, and issues a receipt stating what was verified and what remains open. It runs as a local service on your machine for developers using AI agents.
Yoetz pricing
Pricing model: Freemium
Free and open source (Apache-2.0)
Yoetz pros
- Verifies agent claims against actual tool calls, edits, and test runs to catch false 'done' claims
- Fully local: append-only SQLite ledger, nothing leaves your machine
- Works over MCP with any host, plus native hook support for Codex, Claude Code, and Cursor
- Open source under Apache-2.0
Yoetz cons
- Stable only on macOS; Linux and Windows (via WSL 2) are experimental
- Multi-agent task lineage and project coordination features are listed as 'coming soon', not yet available
- Optional reviewer model requires your own API key or ChatGPT plan
Frequently asked questions about Yoetz
Does Yoetz send my data anywhere?
No. It runs as one local service on your machine; nothing goes through the company, and the optional reviewer model runs with your own API key or ChatGPT plan.
Which AI agents does Yoetz support?
It officially supports Codex, Claude Code, and Cursor, and can work with any MCP host via its six MCP tools.
How does Yoetz detect when an agent's claims are wrong?
It compares an append-only ledger of what the agent says it did against structural facts reported by hooks (sessions, tool calls, edits, results); any disagreement becomes a 'finding' the agent must fix, and the receipt shows what was verified versus still open.