Borrowing it
Nothing to install: this file belongs to cyanheads/toolkit-mcp-server. 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/cyanheads/toolkit-mcp-server/main/CLAUDE.mdgit clone --depth 1 https://github.com/cyanheads/toolkit-mcp-serverWrote 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/cyanheads/toolkit-mcp-server/claude-md)<a href="https://agentmods.dev/instructions/cyanheads/toolkit-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/cyanheads/toolkit-mcp-server/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/cyanheads/toolkit-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/cyanheads/toolkit-mcp-server/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 | $0.08959 | $0.08959 |
| Opus 5.5 | $0.03584 | $0.03584 |
| Sonnet 5.5 | $0.01792 | $0.01792 |
| Haiku 4.5 | $0.00896 | $0.00896 |
Grade A, and why
toolkit-mcp-server 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 yesterday.
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
77% identical to obsidian-mcp-server AGENTS.md — 409 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.
How it starts
The opening of the file, as written. The whole thing — 469 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Developer Protocol
Server: toolkit-mcp-server
Version: 2.4.0
Framework: @cyanheads/mcp-ts-core ^0.13.18
Engines: Bun ≥1.4.0, Node ≥24.0.0
MCP SDK: @modelcontextprotocol/server ^2.4.0 (via the framework — not a direct dependency)
Zod: ^4.6.7
Read the framework docs first:
node_modules/@cyanheads/mcp-ts-core/CLAUDE.mdcontains the full API reference — builders, Context, error codes, exports, patterns. This file covers server-specific conventions only.
What's Next?
When the user asks what's next or needs direction, suggest options based on the current project state. Common next steps:
- Re-run the
setupskill — ensures CLAUDE.md, skills, structure, and metadata are populated and up to date with the current codebase - Run the
design-mcp-serverskill — if the tool/resource surface hasn't been mapped yet, work through domain design - Add tools/resources/prompts — scaffold new definitions using the
add-tool,add-app-tool,add-resource,add-promptskills - Add services — scaffold domain service integrations using the
add-serviceskill - Add tests — scaffold tests for existing definitions using the
add-testskill - Field-test definitions — exercise tools/resources/prompts with real inputs using the
field-testskill, get a report of issues and pain points - Run
devcheck— lint, format, typecheck, and security audit - Run the
security-passskill — audit handlers for MCP-specific security gaps: output injection, scope blast radius, input sinks, tenant isolation - Run the
polish-docs-metaskill — finalize README, CHANGELOG, metadata, and agent protocol for shipping - Run the
maintenanceskill — investigate changelogs, adopt upstream changes, and sync skills afterbun update --latest
Tailor suggestions to what's actually missing or stale — don't recite the full list every time.
Core Rules
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.
- yesterday Changed · +17 lines · +874 tokens per session 25520ca48d75
- 23d ago Changed · +2 lines · +125 tokens per session cf0547005d04
- 1mo ago Changed · +17 lines · +1,067 tokens per session 11c4420ebb93
- 1mo ago Changed cde14ce3b280
- 1mo ago Changed 20a057ebb63b
- 1mo ago Changed · +6 lines · +285 tokens per session 8e786d255602
- 1mo ago Changed · +2 lines · +10 tokens per session e52198047891
- 2mo ago First seen · 425 lines · 6,598 tokens per session scan A d677e8559954
toolkit-mcp-server CLAUDE.md is an instructions file published in the GitHub repository cyanheads/toolkit-mcp-server (20 stars, last pushed 2d ago), licensed Apache-2.0. It adds 8,959 tokens to every session, about $0.0358 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 77% identical to obsidian-mcp-server AGENTS.md, differing in 409 lines, and is treated as a copy.
toolkit-mcp-server CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| toolkit-mcp-server CLAUDE.mdcyanheads/toolkit-mcp-server | Instructions file | 20 | 2d ago | Apache-2.0 | A | 8,959 | 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 |