This is essentially a project journal system that creates dated markdown files in .archive/ whenever you finish something worth remembering. It shines during deployment troubleshooting or when you hit a bug you swear you've fixed before. The MEMORY.md index acts as a table of contents across all your archived sessions, organized by category (infrastructure, debugging, features, etc.). The workflow is simple: write what you did, tag it, update the index, then grep through it later when you need to remember how you solved that ECS networking issue three months ago. Keeps everything local and out of git. Think of it as institutionalizing the scattered notes you'd otherwise lose between sessions.
npx skills add https://github.com/resciencelab/opc-skills --skill archive