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/crowdstrike/foundry-skills/agents-mdgit clone --depth 1 https://github.com/CrowdStrike/foundry-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 | $0.02125 | $0.02125 |
| Opus 5 | $0.01063 | $0.01063 |
| Sonnet 5 | $0.00425 | $0.00425 |
| Haiku 4.5 | $0.00213 | $0.00213 |
Grade A, and why
foundry-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 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.
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.
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.
AI Agent Instructions for foundry-skills
This repository is an AI coding assistant plugin for CrowdStrike Falcon Foundry development. It provides specialized skills that guide AI assistants through building complete Foundry apps, covering UI pages, serverless functions, data collections, automation workflows, and API integrations.
The skills are markdown-based and usable by any AI coding assistant. Claude Code users should also see CLAUDE.md for plugin-specific hook and integration details.
Prerequisites
- Foundry CLI: Install cross-platform:
- macOS/Linux:
brew tap crowdstrike/foundry-cli && brew install crowdstrike/foundry-cli/foundry - Windows: Download https://assets.foundry.crowdstrike.com/cli/latest/foundry_Windows_x86_64.zip, expand it, add the installation directory to PATH
- macOS/Linux:
- Authentication: Run
foundry loginto authenticate with CrowdStrike, or usefoundry profile create --no-promptfor headless environments - Development Environment: Node.js, Python, or Go depending on your app requirements
- CLI Reference: https://docs.crowdstrike.com/r/v5114866
Repository Structure
skills/- 9 specialized development skills, each with aSKILL.mdfilehooks/- Hook scripts for Claude Code plugin integrationuse-cases/- Real-world implementation patterns extracted from CrowdStrike Tech Hub blog postsskills/*/scripts/- Skill-specific helper scripts (OpenAPI adaptation, action search, Fusion redirect detection).claude-plugin/- Claude Code plugin manifest and marketplace configuration
Skills Ecosystem
The skills/ directory contains specialized skills that provide systematic approaches for Foundry development. These skills enforce best practices, prevent technical debt, and ensure platform-specific patterns are followed correctly.
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 · 177 lines · 2,125 tokens per session scan A c855e3d1d679
foundry-skills AGENTS.md is an instructions file published in the GitHub repository CrowdStrike/foundry-skills (24 stars, last pushed 3d ago), licensed MIT. It adds 2,125 tokens to every session, about $0.0106 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.
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.