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.
npx agentmods add instructions/mblode/agent-skills/agents-mdgit clone --depth 1 https://github.com/mblode/agent-skillsWhat 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 | $0.01016 | $0.01016 |
| Opus 5 | $0.00508 | $0.00508 |
| Sonnet 5 | $0.00203 | $0.00203 |
| Haiku 4.5 | $0.00102 | $0.00102 |
Grade B, and why
agent-skills AGENTS.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 3d 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.
Enumerates other installed skillsmediumAgent snooping
Other skills' SKILL.md files reveal prompts, capabilities and secrets that should be invisible to peers.
ls ~/.claude/skills/pr-reviewer/ How it starts
The opening of the file, as written. The whole thing — 93 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Repository Guidelines
Project Structure & Module Organization
skills/holds each skill in its own folder (kebab-case). Each skill has aSKILL.mdfile with YAML frontmatter (name,description) and Markdown guidance.- Some skills include reference files alongside the
SKILL.md(e.g.skills/agents-md/references/). - Top-level files:
README.md(overview and install docs).
Install / Development Commands
Primary install (recommended)
npx skills add mblode/agent-skills
Installs all skills into ~/.claude/skills/ via the skills CLI. Works with Claude Code, Codex, Cursor, and OpenCode.
Install a single skill:
npx skills add mblode/agent-skills -g --skill pr-reviewer -y
Local dev: symlink hot-swap
For editing skills in place without reinstalling:
# One-time: symlink the repo's skills folder into the deploy target
ln -s /path/to/agent-skills/skills/<name> ~/.claude/skills/<name>
Changes to the repo files take effect immediately, with no re-install needed. Unlink with unlink ~/.claude/skills/<name> when done.
The deploy chain: skills add writes the content once to ~/.agents/skills/<name>/. Agents that read that canonical path directly, which is every agent whose skillsDir is .agents/skills (Codex, Cursor, and most others), need nothing further; the CLI calls them universal and installs there rather than into ~/.codex/skills or ~/.cursor/skills. Claude Code reads .claude/skills, so it alone gets a relative symlink, ~/.claude/skills/<name> -> ../../.agents/skills/<name>. Editing this repo changes none of them until you reinstall or symlink the folder directly.
Smoke-test
Confirm files landed correctly after install:
ls ~/.claude/skills/pr-reviewer/
# Expected: SKILL.md (plus any references/ folder)
For a full install smoke-check:
ls ~/.claude/skills/ | sort
The list should match the folders in skills/ here.
Coding Style & Naming Conventions
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.
- 3d ago First seen · 93 lines · 1,016 tokens per session scan B 7f2a0a300e72
agent-skills AGENTS.md is an instructions file published in the GitHub repository mblode/agent-skills (95 stars, last pushed 3d ago), licensed MIT. It adds 1,016 tokens to every session, about $0.0051 per session on Opus 5. A static security scan graded it B with 1 finding (enumerates other installed skills). 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).
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.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
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 oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
next.js AGENTS.md
Instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.