spellbook

Spellbook 109 Cross-Runtime Skills | 7 Claude Code Agents | One Command Install

A cross-runtime skill library for Claude Code, Codex, and multi-agent workflows.

Quick Start •
Runtime Targets •
Pick a Workflow •
Skills •
Agents •
Changelog •
Release Status •
Contributing •
中文

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Rename notice: Spellbook was formerly Claude Arsenal. Claude Code remains a first-class target; the new name reflects the broader roadmap for Claude Code, Codex, and cross-runtime agent skills. See the migration note for details.

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Quick Start

Start with one job-shaped workflow. The maintained skills CLI lets you choose the supported coding agents during installation and installs only these four skills:

npx skills add majiayu000/spellbook --skill frontend-design --skill app-ui-design --skill ui-design-system --skill figma-to-react

Use npx skills add majiayu000/spellbook --list to inspect the catalog before installing. See Pick a Workflow for four other focused starting points.

Advanced Cross-Runtime Installer

install.sh remains available when you want explicit Claude Code/Codex target paths or need to install the repository's Claude Code agents as well as skills.

# Install all skills and supported agents into both maintained runtimes
curl -fsSL https://raw.githubusercontent.com/majiayu000/spellbook/main/install.sh | bash -s -- --target all

# Or clone the repository and select skills explicitly
git clone https://github.com/majiayu000/spellbook.git
cd spellbook
./install.sh --target all --skills typescript-project,python-project,devops-excellence

Verify Installation

• Claude Code: type / to see your installed skills.
• Codex: restart Codex so it reloads ~/.agents/skills.

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Runtime Targets

Spellbook keeps the skill source in one place and installs it into the runtime you use.

Target	Installed To	Status
Claude Code	~/.claude/skills plus ~/.claude/agents	Skills and agents supported
Codex	~/.agents/skills	Skills supported; agents skipped
All	Both Claude Code and Codex paths	Recommended for multi-tool users

Claude Code remains a first-class target and search entry. The project was formerly known as Claude Arsenal; the new Spellbook name reflects the broader goal: reusable skills that can travel across coding agents. Older Spellbook versions installed Codex skills under ~/.codex/skills; reinstall with the current installer to use the documented Codex user-level skill path.

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Pick a Workflow

Start with a small bundle that matches the job, then add more skills when the workflow sticks.

Workflow	Install	Good for
Frontend and UI	npx skills add majiayu000/spellbook --skill frontend-design --skill app-ui-design --skill ui-design-system --skill figma-to-react	Product UI, landing pages, design systems, Figma handoff
Code quality	npx skills add majiayu000/spellbook --skill codebase-audit --skill flowguard --skill systematic-debugging --skill review-gate	Audits, guarded delivery, root-cause debugging, pre-landing review
Ops and release	npx skills add majiayu000/spellbook --skill release-engineering --skill server-security --skill clash-doctor --skill system-doctor	Release planning, server hardening, and local or network diagnosis
Product and docs	npx skills add majiayu000/spellbook --skill product-discovery --skill prd-master --skill technical-spec --skill product-analytics	Discovery, PRDs, technical specs, metrics plans
Agent workflows	npx skills add majiayu000/spellbook --skill codex-agent --skill multi-ai-research --skill flowguard --skill vibeguard	Cross-review, multi-AI research, context handoff, anti-hallucination checks

High-signal individual skills to try first: github-trending, harmonyos-app, app-ui-design, product-discovery, xiaohongshu, codebase-audit, and server-security.

See Showcase for copy-paste prompts and expected outputs. Use the Spellbook Skill Browser for curated first-party skills, or the Claude Skills Registry for broader community discovery. Release history lives in Changelog.

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Why Spellbook

• Cross-runtime install: one source tree can install into Claude Code and Codex.
• Validated registry: every installable skill is checked by python3 scripts/validate_skills.py --check.
• Progressive disclosure: larger skills use references/, templates/, scripts/, and eval files instead of one giant prompt.
• Practical coverage: engineering, operations, product, UI, content, and agent workflows live in one catalog.

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Skills

The generated full skill inventory lives in Skill Registry. Skill layout rules live in Skill Format Policy. Skill authoring quality rules live in Skill Quality Playbook.

Search the Registry

# Free-text query (AND semantics across name, description, category, tags)
python3 scripts/validate_skills.py search rust testing

# Filter by tag
python3 scripts/validate_skills.py search --tag agent

# Restrict to a description language
python3 scripts/validate_skills.py search --language zh deploy

# Machine-readable output
python3 scripts/validate_skills.py search --tag react --json

The tag index lives in registry/tags.json for tooling and dashboards. Curated overrides for skills the keyword heuristic cannot infer live in registry/tag_overrides.yml.

Audit non-blocking skill quality signals:

python3 scripts/audit_skill_quality.py
python3