Borrowing it
Nothing to install: this file belongs to JohanSpannare/awesome-claude-extensions. 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/JohanSpannare/awesome-claude-extensions/main/CLAUDE.mdgit clone --depth 1 https://github.com/JohanSpannare/awesome-claude-extensionsWrote 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/johanspannare/awesome-claude-extensions/claude-md)<a href="https://agentmods.dev/instructions/johanspannare/awesome-claude-extensions/claude-md"><img src="https://agentmods.dev/badge/instructions/johanspannare/awesome-claude-extensions/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/johanspannare/awesome-claude-extensions/claude-md"><img src="https://agentmods.dev/badge/instructions/johanspannare/awesome-claude-extensions/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 | $0.01238 | $0.01238 |
| Opus 5 | $0.00619 | $0.00619 |
| Sonnet 5 | $0.00248 | $0.00248 |
| Haiku 4.5 | $0.00124 | $0.00124 |
Grade A, and why
awesome-claude-extensions 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 10d 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 — 184 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.
Repository Overview
This is an "awesome-*" style curated list repository for Claude agents and extensions. The repository follows the Awesome List format (https://github.com/sindresorhus/awesome), which is a community-driven collection of high-quality resources on a specific topic.
Language Policy
ALL documentation in this repository MUST be in English.
This includes:
- README.md files (main and agent-specific)
- CONTRIBUTING.md
- Agent documentation
- Code comments in examples
- Commit messages
- Pull request descriptions
- Issues and discussions
Why English only?
- Ensures maximum accessibility for the global Claude community
- Maintains consistency across all documentation
- Simplifies maintenance and contributions
- Aligns with standard open-source practices
Repository Structure
This repository is intended to contain:
- README.md: The main curated list in Markdown format with categorized links and descriptions
- CONTRIBUTING.md: Guidelines for contributors on how to submit additions
- .github/: GitHub-specific configuration including issue templates and pull request templates
- Optional: scripts for link checking and validation
Awesome List Format Guidelines
When editing README.md, follow the Awesome List conventions:
- Structure: Use h2 (##) for category headers, with items as unordered list entries
- Entry format:
- [Project Name](link) - Brief description ending with period. - Alphabetical ordering: Items within each category should be alphabetically sorted
- Link validation: All links must be active and point to quality resources
- Description quality: Descriptions should be concise (typically one line), informative, and end with a period
Content Guidelines
For Claude extensions specifically:
- Include official and well-maintained extensions
- Verify that extensions are currently functional
- Categorize by type (e.g., browser extensions, IDE plugins, API wrappers, productivity tools)
- Include both the extension itself and its source repository when available
- Prioritize open-source and community-driven projects
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.
- 10d ago First seen · 184 lines · 1,238 tokens per session scan A d734e936ddd8
awesome-claude-extensions CLAUDE.md is an instructions file published in the GitHub repository JohanSpannare/awesome-claude-extensions (1 stars, last pushed 7mo ago), licensed MIT. It adds 1,238 tokens to every session, about $0.0062 per session on Opus 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.
Other instructions, from other repositories
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.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
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).
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
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.