Borrowing it
Nothing to install: this file belongs to arittr/spectacular. 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/arittr/spectacular/main/CLAUDE.mdgit clone --depth 1 https://github.com/arittr/spectacularWrote 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/arittr/spectacular/claude-md)<a href="https://agentmods.dev/instructions/arittr/spectacular/claude-md"><img src="https://agentmods.dev/badge/instructions/arittr/spectacular/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/arittr/spectacular/claude-md"><img src="https://agentmods.dev/badge/instructions/arittr/spectacular/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 | $0.05858 | $0.05858 |
| Opus 5.5 | $0.02343 | $0.02343 |
| Sonnet 5.5 | $0.01172 | $0.01172 |
| Haiku 4.5 | $0.00586 | $0.00586 |
Grade A, and why
spectacular 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 2mo 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 — 708 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.
Project Overview
Spectacular is a Claude Code plugin that enables spec-anchored development with automatic parallel task execution. It extends the superpowers plugin with commands and skills for feature specification, task decomposition, and parallel execution via git worktrees and git-spice stacked branches.
Core Philosophy:
- Spec anchoring: Every line of code traces back to spec + constitution
- Automatic parallelization: Independent tasks run simultaneously via git worktrees
- Reviewable PRs: Auto-stacked branches keep changes small and focused
- Constitution versioning: Architectural rules evolve explicitly with immutable history
Architecture
Plugin Structure
This is a Claude Code plugin with a pure skills architecture (matching superpowers pattern):
spectacular/
├── .claude-plugin/
│ └── plugin.json # Plugin metadata and configuration
├── commands/ # Thin wrappers (invoke skills)
│ ├── init.md # → invokes validating-environment skill
│ ├── spec.md # → invokes writing-specs skill
│ ├── plan.md # → invokes decomposing-tasks skill
│ └── execute.md # → invokes executing-plan skill
└── skills/ # All logic lives here
├── validating-environment/ # Environment validation
├── writing-specs/ # Complete spec workflow
├── decomposing-tasks/ # Complete plan workflow
├── executing-plan/ # Execution orchestration
├── executing-sequential-phase/
├── executing-parallel-phase/
├── versioning-constitutions/ # Constitution evolution workflow
├── using-git-spice/ # Stacked branch management patterns
└── ... (supporting skills)
Command vs Skill (Updated)
- Commands (
commands/*.md): Thin wrappers that invoke skills. Each command is ~5 lines that simply calls the appropriate skill. - Skills (
skills/*/SKILL.md): Contain all orchestration logic. Self-contained workflows that define HOW to do things.
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.
- 2mo ago First seen · 708 lines · 5,858 tokens per session scan A 21cdacb8c714
spectacular CLAUDE.md is an instructions file published in the GitHub repository arittr/spectacular (20 stars, last pushed 9mo ago), licensed MIT. It adds 5,858 tokens to every session, about $0.0234 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.