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Claude Skills

Guardrails for Claude Code — best-practice skills, planning commands, and delivery gates.

Coding agents are good at writing code. They are much worse at holding to engineering discipline — reading the codebase before changing it, keeping to current idioms, proving a test would actually catch a break.

This installs both halves into your project: current technical guidance, and the enforcement that makes it stick. Guidance your agent can skip is a suggestion. Every skill here loads behind a hook that requires it to be applied, and nothing reaches a PR without passing a gate that ran for real.

Contents

• Quick Start
• Why This Exists
• Skill Catalog
• Commands
• How It Works
• Hooks & Internals
• Repository Layout
• Getting Help
• Contributing

Quick Start

Run from any project directory:

npx @spardutti/claude-skills

  Claude Skills Installer v2.58.0

  ── Frontend ──────────────────────────────
  ◉ react              ◯ tanstack-query
  ◯ tanstack-router
  ── Backend ───────────────────────────────
  ◉ fastapi            ◯ docker-best-practices
  ◯ drf-best-practices ◯ drizzle-orm
  ── Database ──────────────────────────────
  ◉ sql

  ↑↓ move · space select · enter confirm

The CLI will:

1. Fetch the latest skills, commands, and agents from GitHub
2. Let you pick skills to install → .claude/skills/
3. Let you pick commands to install → .claude/commands/
4. Auto-install any subagents the selected commands declare → .claude/agents/
5. Optionally set up the hooks — skill evaluation before edits, verification after (recommended)

Why This Exists

A model's knowledge is frozen and averaged. Ask for React and it reaches for useEffect and manual useMemo. Ask for TypeScript and it assumes 5.x. The code compiles, passes review, and is two years out of date. Skills fix that: tight, opinionated playbooks pinned to current practice for one tool each — React 19.2 and the Compiler, TypeScript 7.0, TanStack Query v5, Drizzle, FastAPI, SQL. They track the changelogs so you don't.

But guidance nobody checks is a suggestion. An agent under deadline pressure skips the playbook, writes the test after the code, and reports a pass. So the same install adds the part that does not negotiate:

• A gate that blocks the first edit until your skills have been applied to the file being written — not just read.
• A Stop hook that runs your typecheck and tests on the changed files every turn, and refuses to let the turn end red.
• A delivery gate that changes your code on purpose and checks whether any test notices. When none do, the PR does not open. The same gate runs one /code-review round for logic bugs and fixes what it finds.

That last one is the difference. Your agent says the tests pass. This finds out.

Skill Catalog

16 skills, grouped the same way the installer presents them.

[!NOTE] Skills marked 📦 Bundle ship a concise always-loaded entry point plus reference files Claude reads only when a task needs them — comprehensive coverage at a low context cost.

Frontend

Skill	What it covers
react 📦	React 19.2 — use, Actions, ref as prop, Rules of Hooks, React Compiler v1.0, component splitting, useEffect avoidance, performance, loading/empty states, Zustand, Tailwind v4 tokens; bundle covers forms (React Hook Form + Zod) and shadcn/ui (Base UI vs Radix, cva, cn())
tanstack-query 📦	TanStack Query v5 — queries, mutations (pessimistic & optimistic), useInfiniteQuery/useSuspenseQuery, query-key factories, v4→v5 migration
tanstack-router	File-based routing, type-safe navigation, loaders & caching, search params, beforeLoad auth guards, pending UI that prevents frozen-feeling navigation

Backend

Skill	What it covers
fastapi 📦	FastAPI — async correctness, Annotated dependency injection, lifespan, response models, testing with dependency overrides; bundle covers Pydantic, Alembic, Celery, and list endpoints (pagination/filtering/search/sorting)
express 📦	Express 5 — automatic async error forwarding, the four-argument error handler, named wildcards, req.query as a getter, validation at the boundary, thin routes, the helmet/CORS/rate-limit baseline; bundle covers tRPC v11 and Better Auth on Express
drf-best-practices	Django REST Framework — thin serializers, service layer, queryset optimization, object-level permissions
drizzle-orm 📦	Drizzle ORM — identity columns, timestamptz, indexed foreign keys, working relations, safe writes and transactions; bundle covers migrations and the 1.0 upgrade, row-level security, connections and test databases
docker-best-practices 📦	Multi-stage builds, layer caching, security hardening, Compose Watch, health checks; bundle covers production Compose (restarts, limits, secrets, migrations, backups)

Database

Skill	What it covers
sql 📦	Schema design, data types, indexing & EXPLAIN, joins & subqueries, ORM patterns (N+1, transactions, locking), safe migrations

Foundations

Cross-cutting craft — applies to any stack, any language.…