Borrowing it
Nothing to install: this file belongs to karrolcia/hippocampus. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/karrolcia/hippocampus/main/CLAUDE.mdgit clone --depth 1 https://github.com/karrolcia/hippocampusWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/karrolcia/hippocampus/claude-md)<a href="https://agentmods.dev/instructions/karrolcia/hippocampus/claude-md"><img src="https://agentmods.dev/badge/instructions/karrolcia/hippocampus/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/karrolcia/hippocampus/claude-md"><img src="https://agentmods.dev/badge/instructions/karrolcia/hippocampus/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.15208 | $0.15208 |
| Opus 5.5 | $0.06083 | $0.06083 |
| Sonnet 5.5 | $0.03042 | $0.03042 |
| Haiku 4.5 | $0.01521 | $0.01521 |
Grade A, and why
hippocampus CLAUDE.md scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- **Verify a deploy with one `curl` against the PUBLIC endpoint, never an ssh polling loop.** After `docker compose up -d --build`, the obvious move is to poll `/health` over ssh until it comes up. Don't: a `for` loop wi The source is not reproduced here
Licensed AGPL-3.0
The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 13d ago Changed · +1 lines · +224 tokens per session 2e958c7140f1
- 14d ago Changed · +47 tokens per session e8afa84f91fe
- 1mo ago Changed · +2 lines · +347 tokens per session b5025a668223
- 1mo ago Changed · +2 lines · +876 tokens per session e372f5753b07
- 1mo ago Changed · +3 lines · +2,779 tokens per session ddab706226ba
- 2mo ago Changed · +8 lines · +2,061 tokens per session 395850421be2
- 2mo ago First seen · 128 lines · 8,874 tokens per session scan A 7d0e0f417247
hippocampus CLAUDE.md is an instructions file published in the GitHub repository karrolcia/hippocampus (13 stars, last pushed 9d ago), licensed AGPL-3.0. It adds 15,208 tokens to every session, about $0.0608 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
hippocampus CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| hippocampus CLAUDE.mdkarrolcia/hippocampus | Instructions file | 13 | 9d ago | AGPL-3.0 | A | 15,208 | Claude Code |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | yesterday | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |