mex

Persistent project memory for AI coding agents. Structured scaffold + drift detection CLI.

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mex

AI agents forget everything between sessions. mex gives them permanent, navigable project memory.

Every session starts cold:

• The agent has no idea what it built yesterday
• It forgets the conventions you agreed on
• It doesn't know what broke last week

Developers compensate by stuffing everything into CLAUDE.md — but that floods the context window, burns tokens, and degrades attention. Meanwhile, the project changes and nobody updates the docs. The agent's understanding drifts from reality.

mex is a structured markdown scaffold with a CLI that keeps it honest. The scaffold gives agents persistent project knowledge through navigable files — architecture, conventions, decisions, patterns. The CLI detects when those files drift from the actual codebase, and targets AI to fix only what's broken. The scaffold grows automatically — after every task, the agent updates project state and creates patterns from real work.

Works with any stack — JavaScript, Python, Go, Rust, and more.

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Install

The npm package is named promexeus (our social handle — mex was taken on npm). The CLI command is mex.

npx promexeus setup

That's it. The setup command creates the .mex/ scaff