Borrowing it
Nothing to install: this file belongs to CrowdStrike/foundry-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.
curl -O https://raw.githubusercontent.com/CrowdStrike/foundry-skills/main/CLAUDE.mdgit clone --depth 1 https://github.com/CrowdStrike/foundry-skillsWrote 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.
[](https://agentmods.dev/instructions/crowdstrike/foundry-skills/claude-md)<a href="https://agentmods.dev/instructions/crowdstrike/foundry-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/crowdstrike/foundry-skills/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>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.
<a href="https://agentmods.dev/instructions/crowdstrike/foundry-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/crowdstrike/foundry-skills/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 5.1 | $0.00590 | $0.00590 |
| Opus 5.5 | $0.00236 | $0.00236 |
| Sonnet 5.5 | $0.00118 | $0.00118 |
| Haiku 4.5 | $0.00059 | $0.00059 |
Grade A, and why
foundry-skills 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 25d 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 — 42 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
Before responding to any Foundry development request, read AGENTS.md for the complete CLI reference, skills ecosystem, and development guide.
Below are Claude Code-specific additions for this plugin.
Plugin Hook Behavior
This plugin includes four hooks that run automatically:
- SessionStart:
foundry-session-start.shchecks CLI version and initializes the Foundry environment - UserPromptSubmit:
foundry-skill-router.shroutes user intents to the appropriate skill - PreToolUse (Bash):
foundry-cli-guard.shchecks Bash commands and adds advisory context when a Foundry CLI command is missing a required flag such as--no-prompt, or when app structure is being created by hand - PreToolUse (Skill):
superpowers-foundry-bridge.shadvises switching fromsuperpowers:brainstormingto the Foundry development workflow skill when the task is Foundry app work
Automated Safety Enforcement
The foundry-cli-guard.sh hook checks every Bash command and flags:
- Foundry CLI commands missing
--no-prompt(preventsError: EOFfailures) - Manual directory/file creation for app structure (prevents invalid manifest.yml)
The hook is advisory: it adds context to the tool call but doesn't block or rewrite the command, so the command still runs as written. Get the flags right before running.
Skills Integration with Claude Code Workflows
Planning Integration: For structured planning with review checkpoints, install superpowers (superpowers:writing-plans, superpowers:executing-plans). Without superpowers, the orchestrator provides basic planning guidance that accounts for dependencies between Foundry capabilities and the manifest.
Execution Integration: If superpowers is installed, superpowers:executing-plans provides batch execution with review checkpoints between capabilities. Otherwise, use the orchestrator's built-in execution checkpoints.
Testing Integration: If superpowers is installed, superpowers:test-driven-development enforces RED-GREEN-REFACTOR discipline. Each Foundry sub-skill also has its own capability-specific testing patterns.
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.
- 25d ago Changed · -12 lines · -109 tokens per session 5758ddbdb24b
- 1mo ago First seen · 54 lines · 699 tokens per session scan A 2d964cfbc4df
foundry-skills CLAUDE.md is an instructions file published in the GitHub repository CrowdStrike/foundry-skills (35 stars, last pushed yesterday), licensed MIT. It adds 590 tokens to every session, about $0.0024 per session on Opus 5.5. 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).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
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 copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.