Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/opagani/cassini-workshop/claude-mdgit clone --depth 1 https://github.com/opagani/cassini-workshopWrote 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/opagani/cassini-workshop/claude-md)<a href="https://agentmods.dev/instructions/opagani/cassini-workshop/claude-md"><img src="https://agentmods.dev/badge/instructions/opagani/cassini-workshop/claude-md.svg" alt="Measured on agentmods" 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 | $0.00161 | $0.00161 |
| Opus 5 | $0.00081 | $0.00081 |
| Sonnet 5 | $0.00032 | $0.00032 |
| Haiku 4.5 | $0.00016 | $0.00016 |
Grade A, and why
cassini-workshop CLAUDE.md scanned grade A with 0 findings 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 5d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
100% identical to cassini-workshop CLAUDE.md — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
The Cassini Mission Plan MCP
Read-only MCP server over the Cassini-Huygens master_plan dataset
(data/cassini.db, ~62k rows). Built as an AI workshop demo: clean,
readable, and runnable live in Claude Desktop.
Stack: TypeScript + Bun. Transport: local stdio.
Rules
- DO NOT REPORT SOMETHING IS FIXED IF YOU HAVEN'T COMPILED THE APP
- DO NOT SEARCH node_modules for answers. GO ONLINE.
- Use emoji for markdown documents for readability.
- Get to the point, be terse, do not over explain. Tokens are water, we're in the desert.
- Never install a package by editing the manifest, always use a package install tool (
bun install, etc).
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.
- 5d ago First seen · 16 lines · 161 tokens per session scan A bd39cef3f3b5
cassini-workshop CLAUDE.md is an instructions file published in the GitHub repository opagani/cassini-workshop (0 stars, last pushed 2mo ago), licensed MIT. It adds 161 tokens to every session, about $0.0008 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to cassini-workshop CLAUDE.md, differing in 0 lines, and is treated as a copy.
Other instructions, from other repositories
cassini-workshop CLAUDE.md
Claude Code instructions for robconery/cassini-workshop, covering the cassini mission plan mcp and rules.
OpenQuantum AGENTS.md
AGENTS.md instructions for xi-zhao/OpenQuantum, covering openquantum, 任务范围、授权与完成, 按任务读取规则和文档, 产品与架构基线 and 四个职责面.
senado-br-mcp-cloudflare CLAUDE.md
Claude Code instructions for SidneyBissoli/senado-br-mcp-cloudflare, covering claude.md, project, commands, architecture and testing convention.
ctxlayer CLAUDE.md
Claude Code instructions for stevenn/ctxlayer, covering ctxlayer — claude code briefing, what runs where, architecture pointers, how a claude session should work in this repo and conventions.
cdc-health-mcp-server CLAUDE.md
Instructions for cyanheads/cdc-health-mcp-server, covering agent protocol, domain, api surface, socrata api endpoints and cdc wonder api.
ctxlayer AGENTS.md
AGENTS.md instructions for stevenn/ctxlayer, covering working in this repo as an agent, golden path for any change, where things live, module rules and adding an endpoint.