Skill Claude CodeCodex
Render the shape of code — module boundaries, the types that cross them, signatures, and a cited call graph — for code that already exists or a change about to be built. Every name, type, and path is read from source and cited, or marked NEW; bodies collapse to one line of intent. Use when asking how something…
Skill Claude CodeCodex
Design, implement, audit, test, troubleshoot, or migrate secure OAuth 2.0 and OpenID Connect (OIDC) systems using RFC 9700 / BCP 240. Use for authorization servers and OpenID Providers, OAuth clients and OIDC relying parties, resource servers, native apps, browser-based apps, multi-issuer login, redirect URIs…
Skill Claude CodeCodex
Turn fuzzy intent into shared understanding and acceptance criteria — specification as a conversation, run one question at a time, before any story is split or planned. Use when an idea, feature request, or problem statement has no agreed rules or examples yet ("let's spec this out", "what should this actually do?"…
Skill Claude CodeCodex
Decide whether planned vertical implementation work should ship as independent pull requests or as a stack of small ordered pull requests, then plan, build, review, update, and merge the stack safely. Use when one slice is too large for effective review, when later slices should proceed on the same evolving baseline…
Skill Claude CodeCodex
Turn broad requirements, large stories, epics, features, initiatives, or backlog items into small end-to-end child stories without turning them into technical component tasks. Use when refining a backlog, decomposing epics, planning an MVP or walking skeleton, looking for vertical slices, reducing story size, applying…
Skill Claude CodeCodex
Produce a mock-audit storyboard — a single HTML page embedding related UX surfaces side-by-side, with per-mock audit checklists, a flow diagram, and gap cards for missing mocks. Use when reviewing several mocks together would materially reduce context-switching or expose cross-surface gaps, or when the user asks to…
Skill Claude CodeCodex
Design, audit, and evolve physical source and package structures that expose real architectural boundaries while keeping related behavior together. Use when creating or reviewing repository trees, deciding where files or packages belong, reducing flat folders, organizing by feature, route, screen, use case, bounded…
Skill Claude CodeCodex
RED-GREEN-REFACTOR for production behavior changes, followed by mutation testing or alternate evidence once at the end-of-phase PR-readiness gate. Use before implementing new features, bug fixes, or any changed observable behavior, and as the governing workflow for mixed implementation work. Do not use for pure…
Skill Claude CodeCodex
Structured learning and tutoring for any topic. Use when the user wants to learn a concept, be quizzed, create a learning plan, generate a structured course, or produce reviewable HTML lessons. Invoked via /teach-me [topic].
Skill Claude CodeCodex
Writing developer-facing prose that can be skimmed first and trusted enough to finish — READMEs, guides, tutorials, reference docs, proposals, PR descriptions, release notes. Use when creating or editing any technical document, when a doc reads as a wall of text, when claims need receipts, or when docs must serve AI…
Skill Claude CodeCodex
Review test quality using Dave Farley's eight properties of good tests. Use when assessing a test file or suite for understandability, maintainability, repeatability, atomicity, necessity, granularity, speed, and evidence of test-first development.
Skill Claude CodeCodex
Testing patterns for behavior-driven tests. Use when writing tests, creating test factories, structuring test files, or deciding what to test. Do NOT use for UI-specific testing (see front-end-testing or react-testing skills).
Skill Claude CodeCodex
Twelve-Factor App patterns for software-as-a-service and long-running process applications. Use when configuring deploy-time environment, backing services, process startup/shutdown, or operational parity. Apply individual principles to frontends, serverless functions, and CLIs only where their runtime and platform…
citypaul/mac-dev-machine-setup
Instructions file
Instructions for citypaul/mac-dev-machine-setup, covering claude.md, repository overview, common development commands, full setup commands and individual task commands.