A curated collection of skills, prompts, and workflows that extend Codex's capabilities — your personal grimoire for AI-powered development.
This repository also configures its own agents. See what codex-spellbook tells them →
Skill Claude CodeCodex
Use when using async SQLAlchemy 2.0 — defining models, writing queries, managing async sessions, loading relationships without N+1, or setting up and debugging Alembic migrations.
Skill Claude CodeCodex
Use when designing a new service from scratch, writing a tech spec or RFC, selecting a database or communication pattern, estimating capacity, or reviewing a design for scalability and reliability gaps.
Skill Claude CodeCodex
Use when composing Tailwind utilities, building responsive or dark-mode layouts, defining component variants with cva, resolving conflicting classes with tailwind-merge, or configuring a custom theme.
Skill Claude CodeCodex
Use when writing a README, documenting an API with OpenAPI, drafting a runbook for on-call engineers, authoring a technical spec or ADR, or setting up docs-as-code with auto-deploy to GitHub Pages.
Skill Claude CodeCodex
Use when building or debugging Temporal-based Agentex agents — structuring workflows and activities, handling signal routing, managing state across replays, or diagnosing workflow failures and retry exhaustion.
Skill Claude CodeCodex
Use when choosing a testing model for a new project, auditing a test suite that is slow or provides low confidence, setting coverage targets, or writing a QA test plan for a release.
Skill Claude CodeCodex
Testing patterns for AAA structure, naming, mocks versus real dependencies, coverage targets, TDD flow, parameterized tests, and flake prevention. Use when writing, reviewing, or repairing automated test suites.
Skill Claude CodeCodex
TypeScript guidance for strict mode, Zod runtime validation, eliminating any, discriminated unions, explicit error modeling, module format choices, path aliases, and Vitest. Use when building or reviewing TypeScript services and applications.
Skill Claude CodeCodex
Use when writing unit tests for a function or module, mocking external dependencies, practising TDD on new business logic, or enforcing a coverage target across a codebase in Python, TypeScript, or Go.
Skill Claude CodeCodex
Use when building real-time features with WebSockets or SSE — choosing between the two, implementing connection management and heartbeats, scaling broadcasts across workers with Redis, handling backpressure, writing tests for streaming endpoints, or debugging connection drops and missed events.
Skill Claude CodeCodex
Use when creating an implementation plan for a non-trivial task — any change spanning multiple files, involving a database migration, requiring specific sequencing, or being handed off to a subagent for execution.
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: