Borrowing it
Nothing to install: this file belongs to clearfunction/cf-devtools. 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/clearfunction/cf-devtools/main/CLAUDE.mdgit clone --depth 1 https://github.com/clearfunction/cf-devtoolsWrote 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/clearfunction/cf-devtools/claude-md)<a href="https://agentmods.dev/instructions/clearfunction/cf-devtools/claude-md"><img src="https://agentmods.dev/badge/instructions/clearfunction/cf-devtools/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/clearfunction/cf-devtools/claude-md"><img src="https://agentmods.dev/badge/instructions/clearfunction/cf-devtools/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 | $0.01613 | $0.01613 |
| Opus 5.5 | $0.00645 | $0.00645 |
| Sonnet 5.5 | $0.00323 | $0.00323 |
| Haiku 4.5 | $0.00161 | $0.00161 |
Grade A, and why
cf-devtools 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 1mo 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 — 208 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CF DevTools - Development Guidelines
Project Overview
WHAT: Claude Code plugin with 2 skills (slidev-presentations, 1password-direnv-secrets) and 8 slash commands.
WHY: Production-ready developer workflows for Clear Function's enterprise clients - presentations and secrets management.
HOW: Skills in skills/, commands in commands/. Test locally before committing.
Quick Commands
# Install locally for testing
/plugin add /path/to/cf-devtools
# Verify plugin structure
ls -la .claude-plugin/
cat .claude-plugin/plugin.json | jq .
# Test a skill activates (in Claude Code)
"Create a presentation about React hooks" # Should trigger slidev-presentations
"Set up 1Password with direnv" # Should trigger 1password-direnv-secrets
# Test a command works
/slidev:new test topic
/secrets:init
# Validate before commit
find skills -name "SKILL.md" -exec head -10 {} \; # Check frontmatter
wc -l skills/*/SKILL.md # Check line counts (<500)
Skill Authoring Best Practices
When creating or modifying skills in this repository, follow these guidelines based on Anthropic's official skill authoring best practices.
The Golden Rule: Progressive Disclosure
SKILL.md is a table of contents, not the encyclopedia.
Skills use progressive disclosure - showing just enough information for Claude to decide what to do next, then revealing details as needed. This means:
- SKILL.md provides an overview and navigation
- Detailed content lives in separate reference files
- Claude loads files only when needed, saving context tokens
skill-name/
├── SKILL.md # Overview + navigation (keep under 500 lines)
├── references/
│ ├── detailed-guide.md # Comprehensive documentation
│ ├── api-reference.md # API details
│ └── examples.md # Input/output examples
└── scripts/ # Executable utilities
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.
- 1mo ago First seen · 208 lines · 1,613 tokens per session scan A b74d1332892c
cf-devtools CLAUDE.md is an instructions file published in the GitHub repository clearfunction/cf-devtools (5 stars, last pushed 9mo ago), licensed Apache-2.0. It adds 1,613 tokens to every session, about $0.0065 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.
Other instructions, from other repositories
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).
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).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.