Hippo is an open-source npm package that gives AI agents portable, structured memory with decay mechanics — shared across Claude, Cursor, and Codex.
An indie developer released Hippo, an open-source memory layer for AI coding agents installable via npm. It implements 7 hippocampal-inspired mechanisms including memory decay, retrieval strengthening, and conflict detection. Memory is stored as portable Markdown files in the user's repo, enabling cross-tool persistence across Claude Code, Cursor, and OpenAI Codex. Auto-sleep hooks integrate directly into Claude Code's settings.json on init.
Hippo solves the most friction-heavy part of multi-tool AI development: context death between sessions. Instead of re-pasting your CLAUDE.md or re-explaining deployment gotchas, Hippo persists structured memories with confidence scores and decay — so stale rules auto-fade and hard-won error lessons stick. The Markdown-file storage means zero vendor lock-in and no cloud dependency, which matters if you're on a regulated codebase.
Install Hippo today, run `hippo hook install claude-code`, then log your last three deployment bugs with `--tag error`. Measure whether your next Claude Code session catches them without re-prompting — that's your ROI signal.
Run: npm install -g hippo-memory && hippo init in your active project root
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