Skill Claude CodeCodex
Write, review, debug, or explain PHP code. Use whenever the user mentions PHP, .php files, Composer, PSR standards, or PHP frameworks (Laravel, Symfony, etc.), or asks about PHP language features, functions, or syntax. For anything beyond common knowledge — exact function signatures, parameter order, return types…
Skill Claude CodeCodex
Fetches a review-feedback corpus for a GitHub repo: all merged PRs, inline review comments, review bodies and PR conversation comments, filtered to human authors on merged PRs. Emits corpus.jsonl for mining coding-style rules. Trigger terms: fetch PR corpus, mine PR comments, style guide mining, review corpus.
Skill Claude CodeCodex
Vendor a library's real source code as read-only analysis material and ground every usage decision in that code instead of docs, web search, or generated guesses. TRIGGER when: the user wants to use a library idiomatically, asks "which API / pattern should I use for a library", asks how a library handles errors…
Skill Claude CodeCodex
Keep humans accountable for code they ship and ensure shared understanding after meaningful work. Use before a git commit, push, or pull request, and after code changes, commands, or reports when recommending a next step.
Skill Claude CodeCodex
Clarify a user story's acceptance criteria with Example Mapping before development. Use for BDD discovery workshops, example mapping, rules, concrete examples, open questions, and story-scope conversations; do not use to write Gherkin or automate tests unless that is also requested.
Skill Codex
Design, implement, or review architecture boundaries using Clean Architecture, Ports and Adapters (Hexagonal), or Functional Core / Imperative Shell. Use for inward dependencies, domain-centred layering (including .NET), inbound/outbound ports, adapters, and isolating business policy from frameworks and…
Skill Claude CodeCodex
Apply Lean Tech to software delivery, team dependencies, technical coaching, and continuous improvement. Use for adopting Lean, Lean-Sensei requests, delivery bottlenecks, Andon signals, requests for help or escalation with blocked work, excess work in progress, or scaling agile teams; use dantotsu for standalone…
Skill Claude CodeCodex
Write, review, debug, and configure Lisp-family code, including Common Lisp, Scheme, CHICKEN Scheme, Racket, JVM Clojure, ClojureScript, Emacs Lisp, Hy, Fennel, and Janet. Use for CHICKEN eggs, csi/csc, Scheme-to-C compilation and FFI, .clj/.cljc/.cljs files, deps.edn, Leiningen, shadow-cljs, JVM/JS interop, CLJS…
Skill Claude CodeCodex
Write, review, debug, and explain C and C++ code (formerly cpp-expert and c-programming). C++: value semantics, initialization, const/constexpr, pointers, arrays, references, lifetime, functions, control flow, compiler questions, idioms. C: .c files, pointers, allocation, buffers, strings, error handling, compiler…
Skill Claude CodeCodex
Data-system design — choosing databases, data models, storage engines, replication, partitioning, transactions, consensus, and batch/stream pipelines. Distilled from "Designing Data-Intensive Applications" (Kleppmann) and "Seven Databases in Seven Weeks". TRIGGER when: database choice (which database, SQL vs NoSQL…
Skill Claude CodeCodex
Write, review, and debug idiomatic Elixir — pattern matching, pipelines, immutable data, processes, OTP (GenServer, Supervisor, Task, Agent), Mix projects, and ExUnit. TRIGGER when: Elixir, .ex/.exs files, mix.exs, mix test, iex, |> pipe operator, pattern matching on tuples/maps/lists, with/case/cond, GenServer…
Skill Claude CodeCodex
Write, review, and debug Elm front-end code — The Elm Architecture (Model/Msg/update/view), custom types, Maybe/Result, JSON decoders, Cmd/Sub, HTTP, and JavaScript ports. TRIGGER when: Elm, .elm files, elm.json, elm make, elm-test, elm-format, elm reactor, Html.Attributes, Browser.element/sandbox/application, update…
Skill Claude CodeCodex
Idiomatic, modern Java (17/21+) — API and class design, immutability, generics, enums, lambdas and streams, exceptions, concurrency, serialization, and aspect-oriented programming with AspectJ / Spring AOP. TRIGGER when: language (Java, .java files, JDK, JVM, Maven, Gradle, pom.xml), objects (static factory, builder…
Skill Claude CodeCodex
Write, review, and debug idiomatic modern Python. TRIGGER when: Python, .py files, pyproject.toml, pip, uv, venv, pytest, type hints, mypy, pyright, ruff, dataclasses, generators, decorators, context managers, asyncio, async/await, comprehensions, f-strings, pathlib, logging, packaging, virtual environments, Pythonic…
Skill Claude CodeCodex
Write, audit, or improve a repository's front-door docs: README.md and AGENTS.md (plus harness adapters CLAUDE.md, .cursorrules, GEMINI.md, Copilot instructions). Use for "writing a readme" / "writing a good agents md": create, improve, restructure, or make a README look more professional (library, CLI, app, monorepo…
Skill Claude CodeCodex
Write, review, and debug idiomatic Rust and systems-level Rust code. TRIGGER when: Rust, .rs files, Cargo.toml, cargo build/test/clippy/fmt, ownership, borrowing, lifetimes, borrow checker errors (E0382, E0499, E0502, E0597, E0106), Result, Option, the ? operator, custom error types, From/Into, Box , traits, generics…
Skill Claude CodeCodex
Write and explain Smalltalk in Pharo — message-passing syntax, image-based live development, class definition, Pharo tools (Playground, Inspector, Debugger, System Browser, Iceberg, SUnit), Spec UI presenters, Teapot/Zinc web apps, and the Smalltalk/MVC origins. TRIGGER when: Smalltalk, Pharo, Squeak, .st files…
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: