Borrowing it
Nothing to install: this file belongs to opagani/cassini-workshop. 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/opagani/cassini-workshop/main/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/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/opagani/cassini-workshop/claude-md"><img src="https://agentmods.dev/badge/instructions/opagani/cassini-workshop/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 | $0.00161 | $0.00161 |
| Opus 5.5 | $0.00064 | $0.00064 |
| Sonnet 5.5 | $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 2mo 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.
- 2mo 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 4mo ago), licensed MIT. It adds 161 tokens to every session, about $0.0006 per session on Opus 5.5. 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.
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