Detects what your AI doesn't know about your project and fixes it. Post-training gap detection, runtime context injection via MCP.
Skill Claude CodeCodex
Apply web animation principles from Animation at Work by Rachel Nabors. Covers human perception of motion, 12 principles of animation, animation patterns (transitions, supplements, feedback, demonstrations, decorations), CSS transitions, CSS animations, Web Animations API, SVG/Canvas/WebGL, communicating animation…
Skill Claude CodeCodex
Use when working with BookLib MCP tools. Reference for lookup, review, remember, verify, guard — parameters, workflows, and anti-patterns.
Skill Claude CodeCodex
Reviews code against Robert C. Martin's Clean Code principles. Use when users share code for review, ask for refactoring suggestions, or want to improve code quality. Produces actionable feedback organized by Clean Code principles with concrete before/after examples.
Skill Claude CodeCodex
Generate and review data-intensive application code using patterns from Martin Kleppmann's "Designing Data-Intensive Applications." Use this skill whenever the user asks about data storage engines, replication, partitioning, transactions, distributed systems, batch or stream processing, encoding/serialization…
Skill Claude CodeCodex
Apply Data Pipelines Pocket Reference practices (James Densmore). Covers Infrastructure (Ch 1-2: warehouses, lakes, cloud), Patterns (Ch 3: ETL, ELT, CDC), DB Ingestion (Ch 4: MySQL, PostgreSQL, MongoDB, full/incremental), File Ingestion (Ch 5: CSV, JSON, cloud storage), API Ingestion (Ch 6: REST, pagination, rate…
Skill Claude CodeCodex
Apply and review GoF design patterns from Head First Design Patterns. Use for Creational patterns (Factory Method, Abstract Factory, Singleton, Builder, Prototype), Structural patterns (Adapter, Bridge, Composite, Decorator, Facade, Flyweight, Proxy), Behavioral patterns (Chain of Responsibility, Command, Interpreter…
Skill Claude CodeCodex
Design and review software using patterns from Eric Evans' "Domain-Driven Design." Use for DDD tactical patterns (Entities, Value Objects, Aggregates, Repositories, Factories, Domain Services), strategic patterns (Bounded Context, Context Map, Anticorruption Layer, Shared Kernel, Open Host Service), supple design…
Skill Claude CodeCodex
Generate and review Java code using patterns and best practices from Joshua Bloch's "Effective Java" (3rd Edition). Use this skill whenever the user asks about Java best practices, API design, object creation patterns, generics, enums, lambdas, streams, concurrency, serialization, method design, exception handling, or…
Skill Claude CodeCodex
Apply Effective Kotlin best practices (Marcin Moskała, 2nd Ed). Covers Safety (Items 1-10: mutability, scope, nulls, types, expectations, errors, resources, tests), Readability (Items 11-18: operators, receivers, properties, naming), Reusability (Items 19-25: DRY, generics, delegation, variance), Abstraction (Items…
Skill Claude CodeCodex
Review existing Python code and write new Python code following the 90 best practices from "Effective Python" by Brett Slatkin (2nd Edition). Use when writing Python, reviewing Python code, or wanting idiomatic, Pythonic solutions.
Skill Claude CodeCodex
Review existing TypeScript code and write new TypeScript following the 62 items from "Effective TypeScript" by Dan Vanderkam. Use when writing TypeScript, reviewing TypeScript code, working with type design, avoiding any, managing type declarations, or migrating JavaScript to TypeScript. Trigger on: "TypeScript best…
Skill Claude CodeCodex
Apply Kotlin In Action practices (Elizarov, Isakova, Aigner, Jemerov, 2nd Ed). Covers Basics (Ch 1-3: functions, extensions, default args), Classes (Ch 4: sealed, data, delegation, companion objects), Lambdas (Ch 5-6: functional APIs, sequences, scope functions), Nullability (Ch 7-8: safe calls, Elvis, platform types…
Skill Claude CodeCodex
Apply The Lean Startup practices (Eric Ries). Covers Vision (Ch 1-4: Start, Define, Learn, Experiment — validated learning, Build-Measure-Learn loop), Steer (Ch 5-8: Leap of faith assumptions, MVP testing, innovation accounting, pivot or persevere decisions), Accelerate (Ch 9-14: small batches, engines of growth …
Skill Claude CodeCodex
Generate and review microservices code using patterns from Chris Richardson's "Microservices Patterns." Use this skill whenever the user asks about microservices architecture, wants to generate service code, design distributed systems, review microservices code, implement sagas, set up CQRS, configure API gateways…
Skill Claude CodeCodex
Write and review Rust code using practices from "Programming with Rust" by Donis Marshall. Covers ownership, borrowing, lifetimes, error handling with Result/Option, traits, generics, pattern matching, closures, fearless concurrency, and macros. Use when writing Rust, reviewing Rust code, or learning Rust idioms.…
Skill Claude CodeCodex
Apply UI design principles from Refactoring UI by Adam Wathan & Steve Schoger. Covers visual hierarchy (size, weight, color, spacing), layout systems (spacing scales, grids), typography (type scales, line-height, alignment), color (HSL palettes, shade systems, accessible contrast), depth (shadow elevation, overlap)…
Skill Claude CodeCodex
Write and review Rust code using systems programming concepts from "Rust in Action" by Tim McNamara. Covers language foundations, ownership and borrowing, smart pointers, data representation (bits, endianness, floats), memory (stack/heap/virtual), file I/O, networking (TCP/HTTP), concurrency (threads/closures), and…
Skill Claude CodeCodex
Select the 1-2 most relevant @booklib/skills for a given file, PR, or task. Use before applying any skill when unsure which book's lens applies, or when multiple skills could apply. Trigger on "which skill", "which book", "route this", "what skill should I use", or whenever a user describes a task without specifying a…
Skill Claude CodeCodex
Write and review Spring Boot applications using practices from "Spring Boot in Action" by Craig Walls. Covers auto-configuration, starter dependencies, externalizing configuration with properties and profiles, Spring Security, testing with MockMvc and @SpringBootTest, Spring Actuator for production observability, and…
Skill Claude CodeCodex
Apply data visualization and storytelling principles from Storytelling with Data by Cole Nussbaumer Knaflic. Covers choosing effective visuals (line, bar, table, scatterplot), eliminating clutter (Gestalt principles, data-ink ratio), focusing attention (preattentive attributes, strategic color), thinking like a…
Skill Claude CodeCodex
Apply system design principles from System Design Interview by Alex Xu. Covers scaling (load balancing, DB replication, sharding, caching, CDN), estimation (QPS, storage, bandwidth), the 4-step framework, and 12 real designs: rate limiter, consistent hashing, key-value store, unique ID generator, URL shortener, web…
Skill Claude CodeCodex
Apply Using Asyncio in Python practices (Caleb Hattingh). Covers Introducing Asyncio (Ch 1: what it is, I/O-bound concurrency), Threads (Ch 2: drawbacks, race conditions, GIL, ThreadPoolExecutor), Asyncio Walk-Through (Ch 3: event loop, coroutines, async def/await, tasks, futures, gather, wait, async with, async for…
Skill Claude CodeCodex
Apply Web Scraping with Python practices (Ryan Mitchell). Covers First Scrapers (Ch 1: urllib, BeautifulSoup), HTML Parsing (Ch 2: find, findAll, CSS selectors, regex, lambda), Crawling (Ch 3-4: single-domain, cross-site, crawl models), Scrapy (Ch 5: spiders, items, pipelines, rules), Storing Data (Ch 6: CSV, MySQL…