skillful-agent-system-builder: Instructions file for Claude Code

CLAUDE.md

skillful-agent-system-builder CLAUDE.md is an instructions file for Claude Code from houarnu166/skillful-agent-system-builder. It costs 6,157 tokens per session, scanned D, a copy of skillful-agent-system-builder AGENTS.md, MIT.

A project guide for NixKits, a collection of Nix packages, operating-system modules, patches, overlays, and AI-agent skills. It also defines access checks, startup audits, language rules, and Nix workflow conventions.

In plain words
What is it for?
It guides audits, Nix builds and checks, documentation and skill maintenance, access control, and multilingual project files.
Why use it?
It makes the agent verify authorization and inspect the project before making changes, while explaining important rules such as refreshing dependencies locally.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions subagents; names the AskUserQuestion tool; mentions Claude Code.

This is houarnu166/skillful-agent-system-builder's own configuration. It tells Claude Code how to work on skillful-agent-system-builder 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 skillful-agent-system-builder configures →

Reuse

Borrowing it

Nothing to install: this file belongs to houarnu166/skillful-agent-system-builder. 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/houarnu166/skillful-agent-system-builder/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/houarnu166/skillful-agent-system-builder

Made for: Claude Code.

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 skillful-agent-system-builder CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/houarnu166/skillful-agent-system-builder/claude-md.svg)](https://agentmods.dev/instructions/houarnu166/skillful-agent-system-builder/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/houarnu166/skillful-agent-system-builder/claude-md"><img src="https://agentmods.dev/badge/instructions/houarnu166/skillful-agent-system-builder/claude-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 6,157 This file is loaded in full into every session.
When invoked 6,157 The same file — it is already loaded in full.
Security scan D 2 findings. Scan, not verified.
Origin 97% 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 $0.06157 $0.06157
Opus 5 $0.03078 $0.03078
Sonnet 5 $0.01231 $0.01231
Haiku 4.5 $0.00616 $0.00616

Measured 6d ago against content hash 2df8f54bae7e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade D, and why

skillful-agent-system-builder CLAUDE.md scanned grade D with 2 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 6d 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

- Create locked copy: jenny-draft-approved.md (chmod 444)

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf ./temp/skillful-session/ && mkdir -p ./temp/skillful-session/
Origin

This is a copy

97% identical to skillful-agent-system-builder AGENTS.md — 4 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.

CLAUDE.md · 779 lines

How it starts

The opening of the file, as written. The whole thing — 779 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CRITICAL INSTRUCTION

BEFORE answering ANY user request, you MUST FIRST execute 'Phase 0: Session Initialization'.

  1. Check if ./temp/skillful-session/ exists.
  2. If it's a new request, run the initialization commands immediately.
  3. ONLY THEN proceed to answering or invoking Sam. DO NOT skip this step. The Orchestrator MUST be the entry point.

Skillful Agent System Build - Orchestrator

Role: Central coordinator for 3-stage Agent+Skill system design workflow.

Project Context & Operations

Purpose: Transform user requests into production-ready Agent+Skill systems through Requirements Analysis (Sam) → Detailed Design (Jenny) → Quality Review (Will).

Tech Stack:

  • Runtime: Claude Code Subagent architecture
  • File Format: Markdown (Agents), YAML frontmatter (Skills)
  • Dependencies: ./context/*.md (Anthropic official docs)
  • Output: Start Prompt files in ./outputs/

Operational Commands:

Session Management:

# Initialize (mandatory on every new request)
rm -rf ./temp/skillful-session/ && mkdir -p ./temp/skillful-session/

# Create session metadata
cat > ./temp/skillful-session/session.json << EOF
{
  "session_id": "$(date +%s)",
  "started_at": "$(date -Iseconds)",
  "current_stage": "init",
  "fast_mode": false
}
EOF

# Check current stage
jq -r '.current_stage' ./temp/skillful-session/session.json

# Update stage
jq '.current_stage = "sam_complete"' ./temp/skillful-session/session.json > tmp.$$.json && mv tmp.$$.json ./temp/skillful-session/session.json

# Verify output
ls -1 ./outputs/*-start-prompt.md | tail -1

Subagent Invocation:

# Stage 1
Use sam-analyst subagent.
Input: {user_request, fast_mode}
Output: ./temp/skillful-session/sam-draft.md

# Stage 2
Use jenny-engineer subagent.
Input: Read ./temp/skillful-session/sam-draft.md
Output: ./temp/skillful-session/jenny-draft.md

# Stage 3
Use will-reviewer subagent.
Input: Read ./temp/skillful-session/jenny-draft.md
Output: ./outputs/{system-name}-start-prompt.md

Read the full file on GitHub · 779 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. 6d ago First seen · 779 lines · 6,157 tokens per session scan D 2df8f54bae7e

Subscribe to this mod's changes

skillful-agent-system-builder CLAUDE.md is an instructions file published in the GitHub repository houarnu166/skillful-agent-system-builder (23 stars, last pushed 6mo ago), licensed MIT. It adds 6,157 tokens to every session, about $0.0308 per session on Opus 5. A static security scan graded it D with 2 findings (asks for root, recursive force delete). It is 97% identical to skillful-agent-system-builder AGENTS.md, differing in 4 lines, and is treated as a copy.

Related

Other instructions, from other repositories

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.

vercel/next.js · 7,296 tokens

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.

openai/codex · 5,182 tokens

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).

microsoft/vscode · 6,785 tokens

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).

microsoft/vscode · 5,001 tokens

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.

langchain-ai/langchain · 4,469 tokens

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.

github/spec-kit · 7,104 tokens