Borrowing it
Nothing to install: this file belongs to Chappygo-OS/Atomic-Spec. 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/Chappygo-OS/Atomic-Spec/main/CLAUDE.mdgit clone --depth 1 https://github.com/Chappygo-OS/Atomic-SpecWrote 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/chappygo-os/atomic-spec/claude-md)<a href="https://agentmods.dev/instructions/chappygo-os/atomic-spec/claude-md"><img src="https://agentmods.dev/badge/instructions/chappygo-os/atomic-spec/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/chappygo-os/atomic-spec/claude-md"><img src="https://agentmods.dev/badge/instructions/chappygo-os/atomic-spec/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 | $0.03372 | $0.03372 |
| Opus 5.5 | $0.01349 | $0.01349 |
| Sonnet 5.5 | $0.00674 | $0.00674 |
| Haiku 4.5 | $0.00337 | $0.00337 |
Grade A, and why
Atomic-Spec 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 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.
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 — 200 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.
What This Repository Is
This is not a runtime application. It is a governance framework for AI-driven development — a customized fork of GitHub's Spec Kit that implements the Atomic Traceability Model. The deliverables are templates, prompts, knowledge stations, and a thin Python CLI. Consumers install this framework into their own projects to constrain how AI coding agents (Claude Code, Gemini, Copilot, Cursor, Windsurf, and ~13 others) generate code.
Inspired by Leapable's "Stop Vibe Coding (Until You Do This)" video. The core premise: AI agents produce drift unless forced through gated, atomic, context-pinned phases.
The Nine Prime Directives (memory/constitution.md, Article IX)
These are the non-negotiable rules that every command in this framework enforces. When working in this repo, never weaken or bypass them — they are the entire value proposition:
- Directory Supremacy — every feature gets
index.md+traceability.md - Atomic Injunction —
/atomicspec.tasksis FORBIDDEN from creating a singletasks.md. It must create atasks/directory with individualT-XXX-[name].mdfiles - Context Pinning — during
/atomicspec.implement, the AI may ONLY readindex.md, the current task file, andtraceability.md. Readingplan.mdorspec.mdduring implementation is forbidden - Gate Compliance — Knowledge Station gate criteria must pass before phase transitions
- Knowledge Routing — unknown decisions consult the Station Map first, then the specific station
- Human-In-The-Loop —
/atomicspec.planpauses at 4 mandatory checkpoints (tech stack, validation, UI, registry sync). v0.5+ adds an optional derivation checkpoint (Phase 0.85 — Test Strategy Derivation, HITL #3.5) that inherits the D6 contract; the 4-floor stays. Composes alongside, never replaces. - Project Defaults Registry — all commands read
specs/_defaults/registry.yamland enforce project-wide standards - Self-Contained Tasks — task files embed all context (registry values, domain rules, gate criteria) needed for execution under Context Pinning
- Orientation Read Surface (v0.3+) —
/atomicspec.implementPhase 0 detects cross-provider handoff state viastamp-lifecycle statuson artifact Lifecycle Markers; direct body reads ofplan.md/spec.md/clarify-log.mdremain forbidden, even during orientation. Sibling control to Directive 3; does NOT widen it.
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 · +50 tokens per session 03a20b0c3f69
- 1mo ago First seen · 200 lines · 3,322 tokens per session scan A 61484038ee2d
Atomic-Spec CLAUDE.md is an instructions file published in the GitHub repository Chappygo-OS/Atomic-Spec (10 stars, last pushed 1mo ago), licensed MIT. It adds 3,372 tokens to every session, about $0.0135 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 2026-08-31.
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.