Borrowing it
Nothing to install: this file belongs to Lightning-FM/lightning-fm-mcp. 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/Lightning-FM/lightning-fm-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/Lightning-FM/lightning-fm-mcpWrote 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/lightning-fm/lightning-fm-mcp/claude-md)<a href="https://agentmods.dev/instructions/lightning-fm/lightning-fm-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/lightning-fm/lightning-fm-mcp/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/lightning-fm/lightning-fm-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/lightning-fm/lightning-fm-mcp/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 | $0.00297 | $0.00297 |
| Opus 5.5 | $0.00119 | $0.00119 |
| Sonnet 5.5 | $0.00059 | $0.00059 |
| Haiku 4.5 | $0.00030 | $0.00030 |
Grade A, and why
lightning-fm-mcp 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.
What it actually says
CLAUDE.md — Lightning FM MCP Server
Read-only MCP server over the public Lightning FM catalog (Node + TypeScript). There is no UI in this repo today; the design system below governs any UI, generated page, or brand asset added later.
Design system
Before writing or changing any UI, read design-system/:
design-system/FOUNDATIONS.md— tokens, type scale, spacing, the accessibility floors. Always.design-system/COMPONENTS.md— before building or touching a shared component.design-system/PATTERNS.md— before laying out a page or deciding what gets emphasis.design-system/DECISIONS.md— before changing something that looks arbitrary. It probably is not.
This directory outranks your instincts about spacing, colour, and type size. Border radius is zero everywhere. Minimum 44px interactive targets, 12px interface text, 15px body copy. Brand marks and colourways come from design-system/BRAND.md.
The files in design-system/reference/ are HTML prototypes — open them to see intent, but never copy their inline styles into the codebase.
If the spec is wrong or missing something, say so rather than working around it silently.
design-system/ here is a stamped copy (source commit in its README). The canonical spec lives in the web repo; refresh the copy rather than editing it.
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 · 21 lines · 297 tokens per session scan A 0a3c6a02c648
lightning-fm-mcp CLAUDE.md is an instructions file published in the GitHub repository Lightning-FM/lightning-fm-mcp (0 stars, last pushed 2mo ago), licensed MIT. It adds 297 tokens to every session, about $0.0012 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
lightning-fm-mcp CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| lightning-fm-mcp CLAUDE.mdLightning-FM/lightning-fm-mcp | Instructions file | 0 | 2mo ago | MIT | A | 297 | Claude Code |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | 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 | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| vscode model-prompts.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 2,022 | GitHub Copilot |