agent-skills: Instructions file for Claude Code

AGENTS.md

agent-skills AGENTS.md is an instructions file for Claude Code, Codex, OpenCode from stackhawk/agent-skills. It costs 2,237 tokens per session, scanned A, a copy of agent-skills CLAUDE.md, MIT.

Repository instructions for maintaining StackHawk Agent Skills, a set of coding-agent skills for security scans and StackHawk API work. They describe the repository layout, generated copies, and verification rules.

In plain words
What is it for?
Use them when changing agent skills, repository guidance, platform copies, or generation checks in the stackhawk/agent-skills repository.
Why use it?
They help contributors edit the canonical files rather than generated copies and check that generation produces no unintended differences.

Instructions file for Claude CodeCodexOpenCode

Written for Claude Code and Codex and OpenCode: Claude Code plugin machinery, but also the file is AGENTS.md. Also seen: reads .claude/ paths; mentions .claude-plugin; mentions CLAUDE.md.

This is stackhawk/agent-skills's own configuration. It tells Claude Code, Codex and OpenCode how to work on agent-skills itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything agent-skills configures →

Reuse

Borrowing it

Nothing to install: this file belongs to stackhawk/agent-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/stackhawk/agent-skills/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/stackhawk/agent-skills

Made for: Claude Code, Codex, OpenCode.

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 agent-skills AGENTS.md

README.md
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Your own site
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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.

agentmods 80×15 button for agent-skills AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/stackhawk/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/stackhawk/agent-skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,237 This file is loaded in full into every session.
When invoked 2,237 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 92% copy Near-identical to another mod 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 5.1 $0.02237 $0.02237
Opus 5.5 $0.00895 $0.00895
Sonnet 5.5 $0.00447 $0.00447
Haiku 4.5 $0.00224 $0.00224

Measured 16d ago against content hash 3287a0d0b2c2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agent-skills AGENTS.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 16d 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.

Origin

This is a copy

92% identical to agent-skills CLAUDE.md — 147 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

AGENTS.md · 146 lines

How it starts

The opening of the file, as written. The whole thing — 146 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.

StackHawk Agent Skills

Multi-platform agent skills repo serving Claude, Codex, Gemini, Copilot, Cursor, and OpenCode from one canonical source. Skills teach AI agents to run HawkScan DAST security scanning and query the StackHawk platform API.

Structure

  • plugins/hawkscan/ — HawkScan DAST scanning skill (SKILL.md + references + hooks)
  • plugins/api/ — StackHawk API reporting skill (SKILL.md + references)
  • plugins/wingman/ — Umbrella plugin; /plugin install wingman@stackhawk installs hawkscan + api + data-seed + optimize
  • plugins/wingman/copilot-skills/ — Generated copies of wingman's four skills for GitHub Copilot and Codex, which ignore dependencies (do NOT edit)
  • .claude/skills/skill-authoring/ — Maintainer skill: authoring rules and best practices for contributors to this repo (NOT distributed via marketplace; tracked in git via .gitignore negation; NOT in .version-bump.json — it carries its own version, independent of the release version)
  • skills/ — Symlinks for Gemini/Copilot discovery (points into plugins/)
  • .opencode/skills/ — Symlinks for OpenCode discovery (points into plugins/)
  • .cursor/skills/ — Symlinks for Cursor native skills discovery (points into plugins/)
  • plugins/hawkscan/hooks/cursor/ — Cursor hook scripts and hooks.json
  • cursor/ — Generated Cursor .mdc rules (do NOT edit manually)
  • scripts/generate-cursor-rules.sh — Transforms SKILL.md → Cursor .mdc format
  • scripts/bump-version.sh — Updates all version-bearing files atomically (reads .version-bump.json)
  • scripts/release.sh — Pre-release checks, creates tag, creates GH Release
  • scripts/generate-marketplace-catalogs.py and scripts/generate-marketplace-skills.py: Local install verification helpers; release publishing uses the marketplace repo's scripts/sync-agent-skills.py

Commands

# Regenerate Cursor rules after editing any SKILL.md or references/*.md
bash scripts/generate-cursor-rules.sh

# Verify generation is idempotent (no diff = correct)
bash scripts/generate-cursor-rules.sh && git diff cursor/

# Bump version (updates VERSION + all manifests + SKILL.md frontmatter in one pass)
bash scripts/bump-version.sh --patch   # bug fixes
bash scripts/bump-version.sh --minor   # new skill or significant capability
bash scripts/bump-version.sh --major   # breaking changes

# Release (validates manifests, Cursor rules, and the wingman Copilot bundle;
# creates annotated tag, creates GH Release)
bash scripts/release.sh --dry-run  # validate without creating anything
bash scripts/release.sh            # create tag + GH Release (must be on main, clean tree)
gh workflow run release.yml --ref "v$(cat VERSION)"  # run release checks and sync marketplace main

# macOS/Linux install
bash scripts/install.sh --platform cursor  --target ~
bash scripts/install.sh --platform copilot --target ~

# Regenerate the wingman Copilot bundle after editing any bundled SKILL.md
bash scripts/generate-wingman-skills.sh

# Validate the bundle
bash scripts/test-wingman-skills.sh

# Preview the released marketplace layout in a disposable marketplace checkout:
# see the "Updating the pinned version" section of agent-skills-marketplace/README.md.

Read the full file on GitHub · 146 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. 16d ago Changed · +5 tokens per session 3287a0d0b2c2
  2. 17d ago Changed · +9 tokens per session 942ef9d504c8
  3. 20d ago First seen · 146 lines · 2,223 tokens per session scan A 173acb77d4bf

Subscribe to this mod's changes

agent-skills AGENTS.md is an instructions file published in the GitHub repository stackhawk/agent-skills (16 stars, last pushed 9d ago), licensed MIT. It adds 2,237 tokens to every session, about $0.0089 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 92% identical to agent-skills CLAUDE.md, differing in 147 lines, and is treated as a copy.

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