hippocamp
Agent memory, made simple. Plain Markdown in your own Git repo, shared by all your coding agents, like Claude Code and Codex. One command to install. No API key, no database, no server to run.
Install / Use
claude mcp add guillaumegay13 -- npx -y github:guillaumegay13/hippocampIf the server publishes to npm under a different name, use that package instead — check the repo README.
MCP Server
Model Context Protocol server
Quality Score
Category
Data & AnalyticsSupported Platforms
Our assessment of hippocamp
hippocamp scores 73/100 on our quality scale, 555th of 605 Data & Analytics skills we index.
Its MCP Server is 3.7 KB long, split into 6 sections with 1 code example: a solid amount of guidance for an agent.
It has 3 GitHub stars, so there is little community track record yet; judge it on its content.
Maintenance, license and trust
- The repository was last updated 2 days ago, so hippocamp is actively maintained.
- It is released under the MIT license, a permissive license that allows use, modification and commercial use with attribution.
- Its trust signals score 92/100, with 1 caution from licensing, adoption, age or documentation. These come from repository metadata, not a code audit — read the skill file before letting an agent act on it.
hippocamp compared with similar skills
All 4 of these similar skills score higher than hippocamp; compare them before choosing.
| Skill | Score | Stars | Updated | Format |
|---|---|---|---|---|
| hippocamp (this skill)by guillaumegay13 | 73 | 3 | 2d ago | MCP Server |
| Agent-Reachby Panniantong | 100 | 97.3k | 6d ago | CLAUDE.md |
| headroomby headroomlabs-ai | 100 | 75.4k | 1d ago | CLAUDE.md |
| CowAgentby zhayujie | 100 | 47.4k | today | CLAUDE.md |
| Scraplingby D4Vinci | 100 | 87.6k | today | MCP Server |
Frequently asked questions
- How do I install hippocamp?
- Run
claude mcp add guillaumegay13 -- npx -y github:guillaumegay13/hippocamp. The install tabs above show the steps for each supported agent. - Which AI agents does hippocamp work with?
- It is written for Claude Code, Claude Desktop and OpenAI Codex, as a MCP Server file. Other agents that read the same format can often use it too.
- Is hippocamp safe to use?
- It is MIT-licensed and scores 92/100 on trust signals. Skills are instructions an agent will follow, so read the file before installing it and do not approve commands you do not understand.
- Is hippocamp still maintained?
- The repository was last updated 2 days ago, so hippocamp is actively maintained.
Skill content
View source on GitHubHippocamp
Agent memory, made simple.
Plain Markdown in your own Git repo, shared by all your coding agents, like Claude Code and Codex. One command to install. No API key, no database, no server to run.
Every session starts by waking up from it, and every decision an agent records is a commit you can read, diff, and revert. Open source (MIT).
npx hippocamp@latest install
This installs Hippocamp into every supported agent it finds and creates your memory repo, ~/.lagoon. Restart your agent and it starts each task by waking up from memory.
A replay of a real session. Neither prompt mentions Hippocamp.
Why Hippocamp?
- Written by the agent itself. The agent doing the work records what is worth keeping, in its own words. Events stay as written. Optional Dream reviews recent events to update and compact the two summary files, promoting supported lessons through a pull request you review.
- One memory for every agent. Claude Code, Codex, and your other agents share the same repo. Built-in memory, like Claude Code's or Codex's, stays inside one tool.
- History you can audit. Every memory is a Git commit. Roll back a bad memory like bad code.
- Files you own. Plain Markdown, readable without any UI, synced across machines with your normal Git credentials.
- Nothing to sign up for. No vendor that can change terms or shut down.
Compared with other memory tools
| | Hippocamp | Mem0 | Zep | Graphiti | Letta Code | Basic Memory | Claude Code / Codex built-in | | --- | :---: | :---: | :---: | :---: | :---: | :---: | :---: | | Agent agnostic (MCP server) | ✅ | ✅ | ✅ | ✅ | ❌ | ✅ | ❌ | | Plain files you own | ✅ | ❌ | ❌ | ❌ | ✅ | ✅ | ✅ | | Auditable history | ✅ | ✅ | ❌ | ❌ | ✅ | ❌ | ❌ | | No extra account, API key, or model | ✅ | ❌ | ❌ | ❌ | ✅ | ✅ | ✅ | | Syncs through your own Git | ✅ | ❌ | ❌ | ❌ | ✅ | ❌ | ❌ | | Always free | ✅ | ❌ | ❌ | ❌ | ✅ | ✅ | ✅ | | Open source | ✅ | ✅ | ❌ | ✅ | ✅ | ✅ | ❌ |
Results
Reproducible with the scripts in this repo.
| | Hippocamp | Reference | | --- | ---: | ---: | | Right memory in top 5, LongMemEval-S (470 questions) | 90.5% | BM25: 91.4% | | Text returned per search | 5.9k chars | Whole sessions: 65.5k | | Answer accuracy, Claude Sonnet 5, top 10 results | 77% | Correct sessions given directly: 90% | | Unrelated questions that return nothing (our own test set) | 10 / 10 | |
Full tables, method, and limits: docs/results.md.
Docs
- Setup: install options, the Lagoon repo, a private remote, configuration
- How it works: memory layout, MCP tools, memory rules
- Dream: optional overnight memory updates and compaction as a reviewed pull request
- Results: evals and how to rerun them
- Development: commands and releases
License
MIT
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headroom
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Languages
Trust signals
From repository metadata: license, adoption, age and documentation. Not a code audit — see the Safety scan above for what the skill file itself contains.