mnemoa Tool Flags Stale and Redundant Lines in AI Coding Agent Instruction Files

The developer built mnemoa, a Rust-based tool that scans AI coding agent instruction files such as AGENTS.md and CLAUDE.md to find outdated, duplicated, or contradictory guidance. It checks for overly long instructions, broken paths and commands, plans that have drifted from the code, and rules that linters or formatters could enforce instead. The tool produces a dry-run prune plan with estimated token costs and can convert rules into enforceable checks, logging each change in a ledger. Deterministic checks run locally, while an optional LLM feature is disabled by default, and it supports seven coding agents along with a CLI, HTTP API, Python SDK, and GitHub Action. The developer is seeking feedback on which findings prove useful and which are noisy.