Open source · MIT· formerly Claude Arsenal

One spellbook,
every runtime.

109 cross-runtime skills and 7 specialist agents for Claude Code, Codex, and multi-agent workflows — validated, cataloged, and organized into job-shaped workflows.

109 SKILLS ✦ 7 AGENTS ✦ JOB-SHAPED WORKFLOWS✦
skills CLI — Frontend & UI workflow
$
npx skills add majiayu000/spellbook --skill frontend-design --skill app-ui-design --skill ui-design-system --skill figma-to-react
# choose a supported agent; installs only the four named UI skills
109
Cross-runtime skills
7
Specialist agents
2
Runtimes, one source tree
MIT
Use freely
systematic-debugging ✦ vibeguard ✦ multi-model-orchestrator ✦ app-ui-design ✦ typescript-project ✦ release-engineering ✦ github-trending ✦ codebase-audit ✦ threads ✦ prd-master ✦ figma-to-code ✦ xiaohongshu ✦ rust-project ✦ flowguard ✦ api-design ✦ humanizer ✦systematic-debugging ✦ vibeguard ✦ multi-model-orchestrator ✦ app-ui-design ✦ typescript-project ✦ release-engineering ✦ github-trending ✦ codebase-audit ✦ threads ✦ prd-master ✦ figma-to-code ✦ xiaohongshu ✦ rust-project ✦ flowguard ✦ api-design ✦ humanizer ✦
product-discovery ✦ test-driven-development ✦ golang-web ✦ review-gate ✦ slides ✦ gpu-use ✦ auth-security ✦ skill-creator ✦ harmonyos-app ✦ multi-ai-research ✦ devops-excellence ✦ git-commit-smart ✦ clash-doctor ✦ strategic-compact ✦ brainstorming ✦ database-patterns ✦product-discovery ✦ test-driven-development ✦ golang-web ✦ review-gate ✦ slides ✦ gpu-use ✦ auth-security ✦ skill-creator ✦ harmonyos-app ✦ multi-ai-research ✦ devops-excellence ✦ git-commit-smart ✦ clash-doctor ✦ strategic-compact ✦ brainstorming ✦ database-patterns ✦
01/ Why Spellbook

Write once, cast anywhere.

Cross-runtime install

One source tree installs into both Claude Code and Codex. Write a skill once, use it from any coding agent.

Validated registry

Every installable skill is checked by the registry validator before it ships — structure, frontmatter, dependencies.

Progressive disclosure

Larger skills ship references, templates, scripts, and evals — not one giant prompt that eats your context.

Practical coverage

Engineering, operations, product, UI, content, and agent workflows — one catalog, battle-tested in production.

02/ The catalog

Twelve schools of magic.

full skill registry ↗

Every skill is a directory with hard rules, practical examples, and verification checklists. Pick a school, or install them all.

Tooling & Automation

15 skills

UI/UX & Design

13 skills

AI & Agent Workflow

10 skills

Development Architecture

7 skills

Product Lifecycle

7 skills

Delivery Workflow

7 skills

API & Backend

6 skills

Development Practices

5 skills

Operations & Deploy

5 skills

Cross-Tool Interop

4 skills

Content & Social Media

4 skills

Mobile & Rust

2 skills
$ python3 scripts/validate_skills.py search --tag react --jsonThe registry is machine-searchable — free text, tags, language filters.
03/ Pick a workflow

Start small. Bundle by job.

Install a job-shaped set of skills, then add more once the workflow sticks.

Frontend & UI

Product UI, landing pages, design systems, Figma handoff.

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

Code quality

Audits, bug fixes, refactors, root-cause debugging.

npx skills add majiayu000/spellbook --skill codebase-audit --skill flowguard --skill systematic-debugging --skill review-gate

Ops & deploy

Shipping apps, hardening servers, diagnosing local and network issues.

npx skills add majiayu000/spellbook --skill release-engineering --skill server-security --skill clash-doctor --skill system-doctor

Product & docs

Discovery, PRDs, technical specs, metrics plans.

npx skills add majiayu000/spellbook --skill product-discovery --skill prd-master --skill technical-spec --skill product-analytics

Agent workflows

Cross-review, multi-AI research, context handoff, anti-hallucination checks.

npx skills add majiayu000/spellbook --skill codex-agent --skill multi-ai-research --skill flowguard --skill vibeguard
04/ Agents

Seven familiars.

Specialist Claude Code agents for coordination, exploration, review, security, and infrastructure.

05/ The agent infra stack

Part of a larger circle.

Spellbook is the Extend layer of an open-source stack for running coding agents as serious infrastructure. Every piece works standalone; together they close the loop.

Choose a workflow, then verify installation

This Spellbook is the cross-runtime skill library maintained at majiayu000/spellbook. Start with a task bundle rather than installing the entire library.

How do I see the catalog before installing?

Run npx skills add majiayu000/spellbook --list, then select the names from Pick a Workflow using repeated --skill options. The CLI lets you select supported agents and installation scope.

When should I use the repository installer?

Use install.sh when you need explicit runtime targets or Spellbook's Claude Code agents. From a cloned checkout, bash install.sh --target codex --skills frontend-design selects one skill. Follow the installation guide for paths and verification.

Why is an installed skill missing in Codex?

The repository installer uses ~/.agents/skills for Codex and ~/.claude/skills for Claude Code. Check the selected target and installed directory, then start a new Codex session so it loads the updated skills. Claude Code plugin manifests and agents are not Codex skill installations.

See worked examples for what to try next, or report installation problems in GitHub issues with the command and runtime you used.