What is abilities CLAUDE.md?

Repository instructions for maintaining the Abilities plugin marketplace, a collection of Claude Code add-ons described mainly with configuration files and written guidance.

Use them when creating plugins, editing marketplace metadata, installing plugins, or changing the marketplace's documentation-driven structure.

They give coding agents a shared overview of the project, its folder layout, and the rules for adding or updating plugins.

abilities CLAUDE.md — Instructions file by Abilityai

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/abilityai/abilities/claude-md

Clone the repo

git clone --depth 1 https://github.com/Abilityai/abilities

Per session 1,935 This file is loaded in full into every session.

When invoked 1,935 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	$0.01935	$0.01935
Opus 5	$0.00967	$0.00967
Sonnet 5	$0.00387	$0.00387
Haiku 4.5	$0.00194	$0.00194

Measured 2d ago against content hash cded9139e6d5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

abilities 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 2d 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 · 177 lines

How it starts

The opening of the file, as written. The whole thing — 177 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.

Project Overview

This is the Abilities Plugin Marketplace - a curated collection of Claude Code plugins from Ability.ai. The project is documentation-driven: plugins are defined through YAML frontmatter and procedural markdown instructions, not traditional code.

Repository Structure

.claude-plugin/marketplace.json  # Central registry of all plugins
plugins/
  ├── create-agent/             # Create new agents (domain wizards + custom)
  ├── agent-dev/                # Develop agents (skills, memory, backlog, planning)
  ├── trinity/                  # Deploy to Trinity platform
  ├── dev-methodology/          # Documentation-driven development
  └── utilities/                # General-purpose utility skills

Each plugin follows this structure:

plugins/[name]/
  ├── .claude-plugin/plugin.json  # Plugin metadata
  ├── README.md                   # User documentation
  ├── skills/[skill-name]/        # Skill-based plugins
  │   ├── SKILL.md               # Skill definition with YAML frontmatter
  │   └── reference.md           # Technical reference
  └── commands/[cmd].md          # Command-based plugins

Plugin Installation

# Add marketplace (one-time)
/plugin marketplace add abilityai/abilities

# Install plugins
/plugin install create-agent@abilityai    # Create new agents
/plugin install agent-dev@abilityai       # Add skills, memory, backlog
/plugin install trinity@abilityai         # Deploy to Trinity
/plugin install dev-methodology@abilityai # Documentation-driven dev
/plugin install utilities@abilityai       # General utilities

# Manual installation from local
/plugin add ./plugins/trinity

Skill Definition Format

Skills use YAML frontmatter to declare metadata and permissions:

---
name: skill-name
description: What the skill does
allowed-tools: Read, Write, Bash
user-invocable: true
argument-hint: "[optional args]"
---
# Procedural instructions follow in markdown

Read the full file on GitHub · 177 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.

2d ago First seen · 177 lines · 1,935 tokens per session scan A cded9139e6d5

Subscribe to this mod's changes

abilities CLAUDE.md is an instructions file published in the GitHub repository Abilityai/abilities (11 stars, last pushed 14d ago), licensed MIT. It adds 1,935 tokens to every session, about $0.0097 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 2026-08-30.

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

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

abilities CLAUDE.md