Borrowing it
Nothing to install: this file belongs to nublson/purl. 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/nublson/purl/develop/CLAUDE.mdgit clone --depth 1 https://github.com/nublson/purlWrote 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/nublson/purl/claude-md)<a href="https://agentmods.dev/instructions/nublson/purl/claude-md"><img src="https://agentmods.dev/badge/instructions/nublson/purl/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/nublson/purl/claude-md"><img src="https://agentmods.dev/badge/instructions/nublson/purl/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 | $0.34333 | $0.34333 |
| Opus 5.5 | $0.13733 | $0.13733 |
| Sonnet 5.5 | $0.06867 | $0.06867 |
| Haiku 4.5 | $0.03433 | $0.03433 |
Grade A, and why
purl CLAUDE.md scanned grade A with 1 finding 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- **Orphan sweep.** `GET /api/cron/sweep-uploads` (a Vercel cron, hourly: `0 * * * *` in `vercel.json`; `Authorization: Bearer $CRON_SECRET`, 503 without the secret and 401 with a wrong one, like the enrich cron) runs `s The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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 · +4 lines · +1,945 tokens per session f08a8e98c97e
- 2d ago Changed · +134 tokens per session cb81f5a3bb16
- 4d ago Changed · +25 lines · +13,994 tokens per session a87f0fb955e7
- 9d ago Changed · +970 tokens per session da9d116815d3
- 12d ago Changed · +316 tokens per session 782e7589887d
- 18d ago Changed · +1 lines · +942 tokens per session a084ed117692
- 19d ago Changed · +298 tokens per session 082435e647a1
- 21d ago Changed · +12 lines · +1,694 tokens per session 0a0fb8118022
- 22d ago Changed · +5 lines · +3,456 tokens per session 04ade37511e0
- 24d ago First seen · 161 lines · 10,584 tokens per session scan A 3dc5a6621202
purl CLAUDE.md is an instructions file published in the GitHub repository nublson/purl (3 stars, last pushed yesterday), with no licence file. It adds 34,333 tokens to every session, about $0.1373 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other instructions, from other repositories
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Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
generative-ai-for-beginners AGENTS.md
AGENTS.md instructions for microsoft/generative-ai-for-beginners, covering agents.md, project overview, setup commands, initial repository setup and clone the repository.