Borrowing it
Nothing to install: this file belongs to tfscharff/doi-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/tfscharff/doi-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/tfscharff/doi-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/tfscharff/doi-mcp/claude-md)<a href="https://agentmods.dev/instructions/tfscharff/doi-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/tfscharff/doi-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/tfscharff/doi-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/tfscharff/doi-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 | $0.01922 | $0.01922 |
| Opus 5.5 | $0.00769 | $0.00769 |
| Sonnet 5.5 | $0.00384 | $0.00384 |
| Haiku 4.5 | $0.00192 | $0.00192 |
Grade A, and why
doi-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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
MCP server (stdio) that prevents citation hallucination by verifying academic citations against 8 databases: CrossRef, OpenAlex, PubMed, zbMATH, ERIC, HAL, INSPIRE-HEP, Semantic Scholar. ESM TypeScript, Zod 4 for tool input schemas. Runtime supports Node >=18, but development needs Node >=22.12 (vitest 5).
Commands
npm install
npm run build # tsc -> dist/
npm run dev # tsc --watch
npm test # vitest run (all tests)
npx vitest run tests/unit/scoring.test.ts # single file
npx vitest run -t "crossref adapter" # by test name
npm run test:coverage # v8 coverage -> coverage/ (gitignored)
No linter is configured.
Releasing (every change is a release)
Don't git commit / git tag by hand. Finish the change, then:
npm run ship -- "fix(scope): short imperative description" --body-file notes.md
npm run ship -- "feat: x" --dry-run # preview the version bump and changelog entry
scripts/ship.mjs (ported from the zoteamo repo) checks the Conventional Commit header, runs npm test, rebuilds dist/, bumps package.json (feat → minor; fix/docs/chore/etc. → patch; ! or BREAKING CHANGE: → major), prepends CHANGELOG.md, commits, tags vX.Y.Z, pushes, and runs gh release create. It refuses to run off main or with a clean tree; --as X.Y.Z forces a version. Pure helpers live in scripts/lib/release.mjs (tested in tests/unit/release.test.ts).
Treat any change to what gets verified or returned, or to tool inputs/outputs, as breaking (!).
dist/ is committed
dist/ is checked in so npx doi-mcp works without a build step. After changing src/, run npm run build and commit the updated dist/ too. tsc never deletes outputs, so when removing or renaming a source file, delete its dist/ counterparts by hand.
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.
- 9d ago Changed · -28 lines · +1,092 tokens per session 6ad6d2ff80a8
- 2mo ago First seen · 120 lines · 830 tokens per session scan A 3b408a50c405
doi-mcp CLAUDE.md is an instructions file published in the GitHub repository tfscharff/doi-mcp (18 stars, last pushed 9d ago), licensed MIT. It adds 1,922 tokens to every session, about $0.0077 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 2026-08-30.
doi-mcp CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| doi-mcp CLAUDE.mdtfscharff/doi-mcp | Instructions file | 18 | 9d ago | MIT | A | 1,922 | 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 |