MuscleMemory

Open-source procedural memory for coding agents. It watches the agent work, learns how a task was done once the tests pass after the last change, and hands the agent a short note on similar later tasks: the files to change, the test that proves it worked and what to avoid. Local by default, with published benchmark runs on Codex and Claude Code you can reproduce.

Use case

Agent frameworks

Pricing tier

Free

Pricing note

Open source (Apache-2.0).

Skill level*

Advanced

License

Apache-2.0

Added

2026-10-26

Sources checked

• thewariend.com/musclememory
• github.com/TheWariend/MuscleMemory
• news.ycombinator.com/item?id=50235670

* Skill level and vibe badges are our own editorial labels. Pricing and plans change often; always confirm on the official site. Last checked 2026-10-21.