Borrowing it
Nothing to install: this file belongs to addyosmani/factory. 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/addyosmani/factory/main/CLAUDE.mdgit clone --depth 1 https://github.com/addyosmani/factoryWrote 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/addyosmani/factory/claude-md)<a href="https://agentmods.dev/instructions/addyosmani/factory/claude-md"><img src="https://agentmods.dev/badge/instructions/addyosmani/factory/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/addyosmani/factory/claude-md"><img src="https://agentmods.dev/badge/instructions/addyosmani/factory/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 | $0.00414 | $0.00414 |
| Opus 5.5 | $0.00166 | $0.00166 |
| Sonnet 5.5 | $0.00083 | $0.00083 |
| Haiku 4.5 | $0.00041 | $0.00041 |
Grade B, and why
factory CLAUDE.md scanned grade B 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 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
jq empty template/.claude/settings.json template/.codex/hooks.json How it starts
The opening of the file, as written. The whole thing — 53 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Factory reference development
This repository builds and documents a reference software factory. It is the distribution
repository, not an installed factory. Files under template/ are copied into another
repository by install.sh.
Read before changing behavior
README.mdis the public map and product boundary.GETTING_STARTED.mdis the desktop-first tutorial.ARCHITECTURE.mdexplains the design decisions.LIMITS.mdrecords product constraints that may change over time.template/docs/factory/CONTRACT.mdis the harness-neutral installed policy.
Preserve the distinction between this repository's contributor instructions and the
template/CLAUDE.md instructions installed in user projects.
Validation
Run the complete local suite before committing:
bash tests/run.sh
For a focused syntax check:
bash -n install.sh template/.claude/hooks/*.sh template/.claude/scripts/*.sh \
template/.factory/scripts/*.sh tests/*.sh
jq empty template/.claude/settings.json template/.codex/hooks.json
The tests use disposable repositories. Do not point them at a real project.
Change rules
- Keep
install.shidempotent and refuse to overwrite user files. - Keep Claude Code as the canonical workflow definition. Codex adapters should remain thin and point to the same contract and workflow files.
- Treat the charter, required gates, merge boundary, and independent verification rule as protected behavior. A convenience change must not silently weaken them.
- Update the tutorial when a user-visible install step changes.
- Date product-specific claims in
LIMITS.mdand verify them against official documentation before changing them. - Use small commits whose message names the behavior or documentation boundary changed.
Writing
Write for a programmer trying this on a real repository. Prefer exact paths, commands, expected output, and failure behavior over broad claims. State when Claude and Codex differ instead of smoothing over the difference.
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 · 53 lines · 414 tokens per session scan B 6c1fea747cd1
factory CLAUDE.md is an instructions file published in the GitHub repository addyosmani/factory (301 stars, last pushed 2mo ago), licensed MIT. It adds 414 tokens to every session, about $0.0017 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.