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Show HN: Hippo, biologically inspired memory for AI agents

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Why This Matters

Hippo introduces a biologically inspired memory system for AI agents, addressing the challenge of retaining relevant information across sessions without overwhelming storage. By enabling shared, portable, and decay-based memory, it enhances multi-tool AI workflows, error tracking, and instruction management, making AI interactions more efficient and context-aware. This innovation is significant for developers and organizations seeking more intelligent, persistent, and adaptable AI agents.

Key Takeaways

🦛 Hippo

The secret to good memory isn't remembering more. It's knowing what to forget.

Works with: Claude Code, Codex, Cursor, OpenClaw, any CLI agent Imports from: ChatGPT, Claude (CLAUDE.md), Cursor (.cursorrules), any markdown Storage: SQLite backbone + markdown/YAML mirrors. Git-trackable and human-readable. Dependencies: Zero runtime deps. Requires Node.js 22.5+. Optional embeddings via @xenova/transformers.

The Problem

AI agents forget everything between sessions. Existing solutions just save everything and search later. That's a filing cabinet, not a brain.

Your memories are also trapped. ChatGPT knows things Claude doesn't. Cursor rules don't travel to Codex. Switch tools and you start from zero.

Who Is This For

Multi-tool developers. You use Claude Code on Monday, Cursor on Tuesday, Codex on Wednesday. Context doesn't carry over. Hippo is the shared memory layer across all of them.

You use Claude Code on Monday, Cursor on Tuesday, Codex on Wednesday. Context doesn't carry over. Hippo is the shared memory layer across all of them. Teams where agents repeat mistakes. The agent hit the same deployment bug last week. And the week before. Hippo's error memories and decay mechanics mean hard lessons stick and noise fades.

The agent hit the same deployment bug last week. And the week before. Hippo's error memories and decay mechanics mean hard lessons stick and noise fades. Anyone whose CLAUDE.md is a mess. Your instruction file grew to 400 lines of mixed rules, preferences, and stale workarounds. Hippo gives that structure: tags, confidence levels, automatic decay of outdated info.

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