What is metapowers CLAUDE.md?

Instructions for Claude Code in the metapowers project, a monorepo where related packages and applications are kept in one repository. They describe the project structure, plugins, skills, and required SKILL.md format.

Use them when editing metapowers plugins, creating skills, reading project architecture, or following the required skill description and output format.

They give Claude Code the project’s conventions so it can locate domain workflows and follow the expected structure when working on them.

metapowers CLAUDE.md — Instructions file for Claude Code by bromso: Instructions for Claude Code in the metapowers project, a…

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add instructions/bromso/metapowers/claude-md

Clone the repo

git clone --depth 1 https://github.com/bromso/metapowers

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/bromso/metapowers/claude-md.svg)](https://agentmods.dev/instructions/bromso/metapowers/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/bromso/metapowers/claude-md"><img src="https://agentmods.dev/badge/instructions/bromso/metapowers/claude-md.svg" alt="Measured on agentmods" height="20"></a>

Per session 749 This file is loaded in full into every session.

When invoked 749 The same file — it is already loaded in full.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00749	$0.00749
Opus 5	$0.00375	$0.00375
Sonnet 5	$0.00150	$0.00150
Haiku 4.5	$0.00075	$0.00075

Measured 5d ago against content hash f2a145800c3d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

metapowers 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 5d 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.

CLAUDE.md · 89 lines

How it starts

The opening of the file, as written. The whole thing — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Metapowers

Structured, repeatable workflows for digital production domains. 288 skills across 16 plugins.

Architecture

Monorepo: Bun + Turborepo workspaces
Plugins (plugins/): Each domain is a plugin with SKILL.md files, hooks, and shared resources
Packages (packages/): CLI (create-metapowers), skill-validator, scoring-harness, figma-mcp
Docs (apps/docs/): Fumadocs + Next.js static site deployed to GitHub Pages

Plugin Structure

Every plugin follows this pattern:

plugins/<domain>/
├── .claude-plugin/plugin.json    # Plugin manifest
├── hooks/hooks.json              # Quality gate hooks
├── shared/                       # Templates and reference docs
└── skills/<skill-name>/SKILL.md  # One SKILL.md per skill

SKILL.md Format

---
description: Verb-first description under 200 chars
---

# Skill Name

What the skill does with "$ARGUMENTS" placeholder.

## Prerequisites
What must exist before running (or "None").

## Process
Numbered steps with clear instructions.

## Output
Where the artifact is written and what to present.

Conventions

Descriptions start with a verb: "Create", "Analyze", "Review" — enforced by skill-validator
Artifacts: All stored in .metapowers/<domain>/<project>/ with numbered prefixes (01-, 02-, etc.)
Commits: Conventional commits (feat(domain):, fix(docs):, docs:, ci:)
Formatting: Biome for linting and formatting (bun run check, bun run format)
Testing: Vitest for packages (bun run test)
Skill validation: bun run lint:skills validates all 288 SKILL.md files

Commands

bun run build          # Build all packages
bun run test           # Run tests
bun run lint:skills    # Validate all SKILL.md files
bun run check          # Biome lint check
bun run format         # Biome auto-format
bun run changeset      # Create a changeset for npm release

Adding a New Domain

Create plugins/<domain>/ following the structure above
Add plugin.json with name, description, author
Create SKILL.md files in skills/<name>/SKILL.md
Add to .claude-plugin/marketplace.json
Create docs in apps/docs/content/docs/<domain>/
Add to apps/docs/content/docs/meta.json sidebar
Run bun run lint:skills to validate

Read the full file on GitHub · 89 lines

Changes

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.

5d ago First seen · 89 lines · 749 tokens per session scan A f2a145800c3d

Subscribe to this mod's changes

metapowers CLAUDE.md is an instructions file published in the GitHub repository bromso/metapowers (1 stars, last pushed 4mo ago), licensed MIT. It adds 749 tokens to every session, about $0.0037 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.

claude-agent claude-code claude-code-plugin claude-skills context-design context-engineering

agent-smith CLAUDE.md

Instructions for cyijun/agent-smith, covering claude.md, project overview, project structure, development workflow and installing the skill for testing.

cyijun/agent-smith · 1,208 tokens

agentic-validation-skills CLAUDE.md

Claude Code instructions for vivekkrishna/agentic-validation-skills, covering agentic test automation guidelines (cige), 1. establish context before testing, 2. anchor every test to intent, 3. define guardrails before executing and 4. treat execution as adaptive guidance.

vivekkrishna/agentic-validation-skills · 1,635 tokens

ccplugins CLAUDE.md

Claude Code instructions for emaballarin/ccplugins, a project described as: ✨ Personal plugins for Claude Code (& friends)... maybe worth sharing!

emaballarin/ccplugins · 3 tokens

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).

microsoft/vscode · 6,785 tokens

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.

github/spec-kit · 7,104 tokens

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.

vercel/next.js · 7,296 tokens