Borrowing it
Nothing to install: this file belongs to constellos/claude-code. 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/constellos/claude-code/main/CLAUDE.mdgit clone --depth 1 https://github.com/constellos/claude-codeWrote 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/constellos/claude-code/claude-md)<a href="https://agentmods.dev/instructions/constellos/claude-code/claude-md"><img src="https://agentmods.dev/badge/instructions/constellos/claude-code/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/constellos/claude-code/claude-md"><img src="https://agentmods.dev/badge/instructions/constellos/claude-code/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 | $0.00401 | $0.00401 |
| Opus 5.5 | $0.00160 | $0.00160 |
| Sonnet 5.5 | $0.00080 | $0.00080 |
| Haiku 4.5 | $0.00040 | $0.00040 |
Grade C, and why
claude-code CLAUDE.md scanned grade C 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 1mo 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.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
- **Cache stale**: `rm -rf ~/.claude/plugins/cache/constellos && claude plugin install --scope project` What it actually says
Claude Code Plugins
Plugin marketplace with shared TypeScript utilities for typed hooks.
Plugins
| Plugin | Purpose |
|---|---|
| github-driven-dev | GitHub workflow orchestration, branch context, CI |
| project-context | CLAUDE.md discovery, validation |
| nextjs-supabase-ai-sdk-dev | Vercel/Supabase, UI dev system |
Hook Pattern
import type { SessionStartInput, SessionStartHookOutput } from '../shared/types/types.js';
import { runHook } from '../shared/hooks/utils/io.js';
async function handler(input: SessionStartInput): Promise<SessionStartHookOutput> {
return {
hookSpecificOutput: {
hookEventName: 'SessionStart',
additionalContext: 'Hook executed',
},
};
}
export { handler };
runHook(handler);
Important: Imports use ../shared/ (plugin-local), NOT ../../../shared/ (repo root).
hooks.json
{
"hooks": {
"SessionStart": [{ "hooks": [{ "type": "command", "command": "npx tsx ${CLAUDE_PLUGIN_ROOT}/hooks/my-hook.ts" }] }]
}
}
Variables: ${CLAUDE_PROJECT_DIR}, ${CLAUDE_PLUGIN_ROOT}
Installation
claude plugin install plugin-name@constellos
Troubleshooting
- Hooks not firing: Check
~/.claude/plugins/cache/, reinstall plugin, restart session - Cache stale:
rm -rf ~/.claude/plugins/cache/constellos && claude plugin install --scope project
Debug
DEBUG=hook-name claude
Logs: .claude/logs/hook-events.json
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.
- 1mo ago Changed · -2 tokens per session 5eae20e5d2db
- 1mo ago First seen · 64 lines · 403 tokens per session scan C 8935b21708fb
claude-code CLAUDE.md is an instructions file published in the GitHub repository constellos/claude-code (5 stars, last pushed 1mo ago), licensed MIT. It adds 401 tokens to every session, about $0.0016 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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.