meta-skill

meta-skill is a skill for Claude Code, Codex from legacybridge-tech/claude-plugins. It costs 54 tokens per session (1,023 once invoked), scanned A, original, MIT.

A manager for a project-local library of on-demand skills. It initializes the library, registers skills, and supports adding, removing, editing, and listing them.

In plain words
What is it for?
Use it to maintain a skill library, create new project skills, update existing instructions, or remove skills that are no longer needed.
Why use it?
It keeps specialized instructions organized and lets the coding agent load them when a request matches.

Skill for Claude CodeCodex

Part of the meta-skill plugin — 1 skill shipped together

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 skills/legacybridge-tech/claude-plugins/meta-skill
Any agent
npx skills add legacybridge-tech/claude-plugins --skill meta-skill
Clone the repo
git clone --depth 1 https://github.com/legacybridge-tech/claude-plugins

Made for: Claude Code, Codex.

Or install meta-skill, the plugin that ships this one along with the rest of its 1 skill.

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.

agentmods badge for meta-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/legacybridge-tech/claude-plugins/meta-skill.svg)](https://agentmods.dev/skills/legacybridge-tech/claude-plugins/meta-skill)
Your own site
<a href="https://agentmods.dev/skills/legacybridge-tech/claude-plugins/meta-skill"><img src="https://agentmods.dev/badge/skills/legacybridge-tech/claude-plugins/meta-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,023 The whole file, excluding the scripts and references it only reads on demand.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00054 $0.01023
Opus 5 $0.00027 $0.00511
Sonnet 5 $0.00011 $0.00205
Haiku 4.5 $0.00005 $0.00102

Measured 4d ago against content hash d979940391e5, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

meta-skill 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 4d 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.

meta-skill/skills/meta-skill/SKILL.md · 140 lines

How it starts

The opening of the file, as written. The whole thing — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Meta-Skill: Dynamic Skill Library

A system for managing on-demand skills that are loaded dynamically instead of at session startup. Skills are stored in skill-library/ and registered in SKILLUSE.md at the project root.

How It Works

Automatic Matching (via CLAUDE.md)

During initialization, a section is added to CLAUDE.md that instructs Claude to check SKILLUSE.md on every user request. When the user's request matches a skill description:

  1. Read skill-library/<skill-name>/SKILL.md from the project root
  2. If the skill references supporting files, read those too
  3. Follow the skill's instructions to handle the user's request

SKILLUSE.md Format

A markdown file at the project root. Each ## heading is a skill name (maps to skill-library/<heading>/), followed by a natural language description:

# Skill Library

## code-review
Code review skill. Perform quality reviews, identify potential issues, and provide improvement suggestions.

## api-design
RESTful API design patterns. Naming conventions, error handling, and versioning.

skill-library/ Structure

skill-library/
├── code-review/
│   ├── SKILL.md            # Main instructions (required)
│   ├── templates/           # Optional supporting files
│   └── examples/            # Optional examples
└── api-design/
    └── SKILL.md

Compatible with .claude/skills/ — skills can be moved between the two systems.

Management Operations

Initialize

When user asks to initialize the skill library:

  1. Create skill-library/ directory in the project root
  2. Create SKILLUSE.md in the project root with this template:
# Skill Library

Skills listed below are available for on-demand loading.
  1. Append Meta-Skill section to CLAUDE.md:

    Read the template from the plugin's templates/claude-md-section.md.

    Replace {VERSION} with the version from .claude-plugin/plugin.json.

    Then apply to CLAUDE.md in the project root:

    • If CLAUDE.md exists and contains <!-- META-SKILL:START -->: Replace everything between <!-- META-SKILL:START --> and <!-- META-SKILL:END --> (inclusive) with the new content
    • If CLAUDE.md exists but has no markers: Append the content to the end of the file (with a blank line separator)
    • If CLAUDE.md does not exist: Create a new CLAUDE.md with the content

Read the full file on GitHub · 140 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.

  1. 4d ago First seen · 140 lines · 54 tokens per session scan A d979940391e5

Subscribe to this mod's changes

meta-skill is a skill published in the GitHub repository legacybridge-tech/claude-plugins (6 stars, last pushed 3mo ago), licensed MIT. It adds 54 tokens to every session and 1,023 once invoked, about $0.0003 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.

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