Claude Code Skills
claudecodexQuality assurance and quality management skills for implementing testing frameworks and verification processes in Claude projects.
200 skills · 39 commands · 1 agent · 1 MCP server
Playful Claude skill evaluation and improvement tool that analyzes model performance and suggests enhancements. Helps identify configuration or prompt issues.
Plugin enitrat-skill-issue from marketplace cascade-code-testing-misc in joshuarweaver/cascade-code-testing-misc. Commands read from the repo's manifest — 1 month ago.
animate-expoBuild animations in React Native and Expo, making the decisions in the order that determines whether they feel right — should it animate, which thread it runs on, which properties, spring or timing, how the gesture hands off, how it degrades. Writes the implementation with Reanimated, Gesture Handle
animateBuild an animation from scratch, making the decisions in the order that determines whether it feels right — should it animate at all, what purpose, which tool, which properties, which curve and duration, how it interrupts, how it exits. Writes the implementation. Use when asked to animate something,
animation-vocabularyReverse-lookup glossary that turns a vague description of a web animation or motion effect into its exact term ("the bouncy thing when a popover opens" → Pop in; "the iOS rubber-band scroll" → Rubber-banding). Use when the user asks "what's it called when…", or describes a motion effect without know
apple-designApple's approach to interface design and fluid, physical motion, translated for the web. Use when building or reviewing gesture-driven UI, spring animations, drag/swipe/sheet interactions, momentum and interruptible transitions, translucent materials and depth, typography (optical sizing, tracking,
ask-sonnerGuide to Sonner, the React toast library — install and wire up the Toaster, pick the right toast() call, promise and loading toasts, updating, dismissing and persisting toasts, styling, theming and icons, positioning and multiple toasters. Use when working with Sonner or troubleshooting it — toasts
emil-design-engThis skill encodes Emil Kowalski's philosophy on UI polish, component design, animation decisions, and the invisible details that make software feel great.
find-animation-opportunitiesSearch a codebase or UI for places that don't animate but should, and reject everything that shouldn't. Read-only; it proposes motion with exact values, it does not implement it. Use when the user asks "what could be animated here?" or wants to "make this feel more alive". For fixing existing animat
improve-animationsSurvey a codebase's animation and motion code as a senior motion advisor, then produce a prioritized audit and self-contained implementation plans for other agents (or cheaper models) to execute. Read-only on source code — it plans improvements, it does not apply them. Use when the user asks to "imp
mobile-nativeMake a web app feel native on a phone — the small CSS and meta-tag fixes that separate "a website in a browser" from something that feels installed. Covers sticky hover states, tap highlight flashes, the 100vh bug, inputs that zoom the page, laggy taps, pull-to-refresh hijacking scroll, content unde
pick-ui-libraryPick the right library for a given frontend task from a curated, opinionated list — numbers, OTP inputs, charts, command menus, virtualization, drag and drop, toasts, state, styling, and more. Only runs when explicitly invoked; it does not trigger on its own.
prototypeBuild multiple genuinely different versions of a UI piece you describe, rendered behind a visual picker so you can flip through them live and promote the one that feels right. Only runs when explicitly invoked; it does not trigger on its own.
review-animationsReviews animation and motion code against a high craft bar derived from Emil Kowalski's design engineering philosophy. Default to flagging; approval is earned.
write-swiftHow to write modern Swift well — modeling with value types, Swift 6 data-race safety and approachable concurrency (@concurrent, main-actor-by-default, actors, task groups), protocols and generics (some vs any), API design, performance and ARC, Swift Testing, macros, and the modern language features
architectSketch types, signatures, and module structure before code, then stay in the loop while implementation fills in. Use for /architect, 'architect this', 'design this', or non-trivial work where jumping to code would lock in the wrong shape.
arenaSpawn N parallel candidates at the same task, pick a base, graft the strongest parts of the losers into it. Use for /arena, 'arena this', 'throw it in the arena', or when one attempt at a non-trivial artifact would lock in the wrong shape.
automate-meUse for \"automate me\", \"create/update/refresh my -mode skill\", \"turn/capture my preferences or working style into a skill\", or wanting agents to follow how the user works. Drafts or revises a personal -mode skill via create-skill + unslop, optionally pulling fresh evidence from recent transcri
blast-radiusFind what a change could break somewhere else before it ships, beyond the diff, and prove the one fact it's safe because of by running real code instead of writing it up. Use for 'blast radius of X', 'what could this break', or reviewing a small diff you don't trust.
broRestate the last message in plain human language, with no jargon.
create-verification-skillGenerate a project-local verification skill that drives your app the way a user does — any language, framework, or platform. Use for /create-verification-skill, \"make a control skill for this repo\", or when a project has no scripted way to prove UI/CLI/service behavior.
figure-it-outDesign an auditable playbook when no narrower one fits: a large migration, an ambitious multi-part change, or work a human reviews after stepping away. Scales rigor to the task, runs a hypothesis loop, and logs decisions via show-me-your-work. Use for /figure-it-out, 'figure it out', a large migrati
howUse for \"how does X work\", code walkthroughs before changing something, and placement / ownership / layering questions (\"where should this live\", \"which package owns this\", \"is this the right layer\"). Explains subsystem architecture, runtime flow, onboarding mental models. Use why for motiva
interrogateUse for \"interrogate\", \"adversarial review\", \"multi-model review\", \"challenge this\", \"stress test this code\", \"find blind spots\", or \"tear this apart\". Multiple LLM reviewers challenge changes from independent angles.
maintain-verification-skillPeriodic pass that keeps a project's verification skill and feature map honest: parallel source readers per feature, one live session driving every feature, at most one PR of proven corrections. Use for /maintain-verification-skill or \"audit the verify skill\".
no-commentsSpawn Comment Sicko, fix accepted findings, and offer encodings for claimed constraints.
Poteto Modepoteto's agent style for concise, detailed responses, deliberate subagents, unslopped prose, simple code, and verified work. Use for poteto, /poteto-mode, or requests to work in this style.
principle-attack-the-premiseApply when two or more fixes that share one premise have failed the same gate. Take a census of which actors hold the imbalance before the next fix, then question the premise instead of writing another fix that assumes it.
principle-boundary-disciplineApply when wiring validation, error handling, or framework adapters. Concentrate guards at system boundaries (CLI, config, network, external APIs); trust internal types and keep business logic in pure functions.
principle-build-the-leverApply to any non-trivial work, not just bulk work: edits, migrations, analyses, checks. Build the tool that does it or proves it (codemod, script, generator, or a skill your subagents follow) instead of working by hand. The tool is the artifact a reviewer can rerun.
principle-encode-lessons-in-structureApply when you catch yourself writing the same instruction a second time, or notice a recurring correction. Encode the rule as a lint, metadata flag, runtime check, or script instead of more text.
principle-exhaust-the-design-spaceApply when facing a novel UI interaction or architectural decision with no precedent in the codebase. Build 2-3 competing prototypes and compare side by side before committing.
principle-experience-firstApply when product, UX, or feature-scope tradeoffs come up. Choose user delight over implementation convenience; ship fewer polished features over more rough ones.
principle-fix-root-causesApply when debugging. Trace each symptom to its root cause and fix it there; reproduce first, ask why until you reach it, resist nil-check guards that silence crashes.
principle-foundational-thinkingApply before writing logic: choosing core types and data structures, sequencing scaffold-vs-feature work, asking what concurrent actors share. Get the data structures right so downstream code becomes obvious.
principle-guard-the-context-windowApply when context is filling up: large outputs, long files, repeated reads, fan-out planning. Route bulk to subagents; keep summaries in the main thread, not raw payloads.
principle-laziness-protocolApply when refactoring, evaluating diff size, or tempted to add abstractions, layers, or signal threading. Bias toward deletion and the smallest change that solves the problem.
principle-make-operations-idempotentApply when designing commands, lifecycle steps, or processing loops that run amid crashes, restarts, and retries. Converge to the same end state regardless of partial prior runs.
principle-migrate-callers-then-delete-legacy-apisApply when introducing a new internal API while old callers still exist. Migrate callers and delete the old API in the same wave instead of preserving compatibility layers.
principle-minimize-reader-loadApply when reviewing or shaping code that's hard to trace. Count layers between question and answer, and hidden state in the reader's head; collapse one-caller wrappers and shrink mutable scope.
principle-model-the-domainApply when writing stateful logic, or when code branches a lot or repeats a shape assumption across files. Encode the domain in a structure instead of scattered conditionals.
principle-never-block-on-the-humanApply when tempted to ask 'should I do X?' on reversible work. Proceed, present the result, let the human course-correct after the fact; reserve confirmation for irreversible actions.
principle-outcome-oriented-executionApply during planned rewrites and migrations with explicit phase boundaries. Converge on the target architecture; don't preserve smooth intermediate states with throwaway compatibility code.
principle-prove-it-worksApply after completing a task, before declaring done. Verify against the real artifact (run the feature, read the actual value, inspect the diff), not a proxy, self-report, or 'it compiles.'
principle-redesign-from-first-principlesApply when integrating a new requirement into an existing design. Redesign as if the requirement had been a foundational assumption from day one, instead of bolting it on.
principle-separate-before-serializing-shared-stateApply when concurrent actors might write to the same file, branch, key, or state object. Eliminate the sharing first; serialize structurally only when one shared writer is a real invariant.
principle-sequence-verifiable-unitsApply to multi-step work (sweeps, migrations, runs of similar edits) and to how you stack commits and PRs. Break work into small units that each end in a verifiable state, check each before the next, and order delivery so the sequence proves itself to a reviewer.
principle-subtract-before-you-addApply when sequencing an addition, refactor, or rewrite. Remove dead code, redundant validators, and stub references first, then build on the simpler base.
principle-test-behavior-not-implementationApply when you write, change, or keep a test. Call the code the way its users do and assert the result they observe against a literal expected value. If the test would still pass when every imported function returns undefined, rewrite the assertion or delete the test.
principle-type-system-disciplineApply when designing types, reviewing a function signature, or writing code in any statically-typed language. Make illegal states unrepresentable, brand semantic primitives, parse external data at boundaries, refuse to lie to the compiler, exhaust variants, derive from authoritative schemas.
recallReconstruct your recent working context from your own chat history, live state, and the shared record (user reports, prior fixes, incidents), then hand back a tight current-state brief. Use for 'recall my work on X', 'catch me up', 'what have I been working on', 'where did I leave off', before start
reflectSpawn three parallel review subagents over the active transcript, surface learnings, and route each to a concrete edit on an existing skill. Use when the user says reflect.
show-me-your-workKeep a reviewable decision trail for long-running or unattended work: a TSV log with one row per decision (what, why, evidence, result). Local by default; commit it when a reviewer needs the trail to trust the result. Use for /show-me-your-work, autonomous or multi-phase runs, or work a human review
swarmFan out N parallel workers, drain them, and return one report. Use for /swarm, 'swarm this', or parallel coverage, races, gauntlets, and exploration.
tddUse only when the user explicitly asks for TDD, a failing test, or a regression test, OR when the bug has an obvious cheap local test target. Skip when the test path is unclear, expensive, integration-heavy, or not requested.
teachExplain a body of work plainly so a person actually understands it. Runs the `how` and `why` skills and weaves what they find into one clear explanation. Use for 'teach me this', 'help me really understand X', 'explain this change or subsystem to me'.
technical-writingLayered technical-writing standard: Diátaxis structure, Google developer style sentences, STE instruction rules, Global English syntax. Use for /technical-writing or when writing or reviewing docs, RFCs, readmes, PR descriptions, or commit messages.
typescript-best-practicesTypeScript best practices. Use when reading or editing any .ts or .tsx file.
unslopCut AI tells from any writing. Must always apply.
whyUse for 'why does X work this way', 'why we picked Y', design rationale, regressions, postmortems, or data-backed thresholds. Discovers available MCPs and queries each evidence category (source control, issue tracker, long-form docs, real-time chat, infrastructure observability, error tracking, prod
comments-best-practicesGuide for deciding when to keep, write, rewrite, or delete code comments and JSDoc. Use when
d2-diagramComprehensive tool for creating D2 diagrams based on descriptions and requirements. This skill should be used when creating visual diagrams, system architectures, flowcharts, network topologies, data flows, or any visual representation that can be expressed as a diagram. Triggers include requests to
effect-best-practicesEnforces Effect-TS patterns for services, errors, layers, and atoms. Use when writing code with Effect.Service, Schema.TaggedError, Layer composition, or effect-atom React components.
effect-testingComprehensive testing patterns for Effect-TS services, errors, layers, and effects. Use this skill when writing tests for Effect-based code.
effect-tsThis skill should be used when the user asks about Effect-TS patterns, services, layers, error handling, service composition, or writing/refactoring code that imports from 'effect'. Also covers Effect + Next.js integration with @prb/effect-next.
agent-conv-cliRead your own local Claude Code / Codex CLI / Cursor conversation history
coding-standardsCorrect-by-construction TypeScript standards. Use for TypeScript engineering or when another skill needs the user's coding standards.
effect-service-designDesign Effect services. Use when designing a new Effect service module or auditing an existing codebase for service, Layer, and composition improvements.
effectOpinionated guide for building production TypeScript applications with Effect v4. Use when implementing Effect workflows, services, layers, schemas, configuration, schedules, caches, streams, HTTP clients, or tests.
show-meHelp the user understand the current topic visually with concise diagrams, code-shape sketches, and focused HTML artifacts.
slack-user-cliRead and write Slack channels, DMs, threads, and search from the terminal
tg-cliRead and send your own Telegram chats from the terminal via the bundled
thermo-nuclear-code-quality-reviewRun an extremely strict maintainability review for abstraction quality, giant files, and spaghetti-condition growth. Use for a thermo-nuclear code quality review, thermonuclear review, deep code quality audit, or especially harsh maintainability review.
github-issueComprehensive GitHub issue lifecycle management from creation through resolution. Use when creating/viewing/editing/managing GitHub issues, writing issue descriptions, creating sub-issues, linking parent/child issues, dumping issue trees to markdown, or pushing issues from files. Covers the full iss
linear-triageLinear project management for a product → design → engineering team. Use whenever the user mentions Linear or an issue identifier like TEAM-123 — shaping a project or writing its brief, writing or reviewing an issue, moving an issue between statuses or handing it to the next seat, auditing a board,
maintainable-reactPrinciples for writing, refactoring, and reviewing React code so it stays maintainable — resisting premature abstraction (the "demon component"), keeping data flow obvious, and putting state and effects in the right place. Use when writing or refactoring a React component or hook, deciding whether t
pr-creatorGuide PR authoring from creation through review completion. Use when creating/submitting/authoring pull requests, writing PR descriptions, responding to reviewer comments, or implementing review feedback. Covers the full PR lifecycle - creating PRs linked to issues, handling review comments (triagin
pr-reviewMechanics for leaving a pull request review on GitHub - CLI scripts for fetching PR data, attaching comments to the right file/line, wording/tone/severity conventions, and posting a batched review. Use when the user has feedback to leave on a PR and needs to know how to post it correctly.
prd-authoringGuide for writing and reviewing clear, persuasive Product Requirements Documents (PRDs), including product proposals, feature proposals, and PRD feedback.
react-best-practicessdk-documentationsubgraph-skilltanstack-best-practicesvocs-documentationQuality assurance and quality management skills for implementing testing frameworks and verification processes in Claude projects.
200 skills · 39 commands · 1 agent · 1 MCP server
Measure test effectiveness with actionable QA metrics and KPIs. For establishing quality dashboards and evaluating test success rates.
200 skills · 1 MCP server
Claude Code plugin that runs coding tasks across multiple AI models simultaneously to identify blind spots before deployment.
70 skills · 54 commands · hooks
Comprehensive guide to code quality metrics and thresholds. Routes to specialized tools for Deptrac, PHPInsights, and testing workflows.
70 skills
Harness for deriving, verifying, and executing requirements-first workflows, enabling AI-driven development from specifications.
37 skills · 30 agents · hooks
Claude skill for debugging React hook tests, flaky tests, and cross-file contamination using Bun test patterns with proper spy cleanup. For React developers troubleshooting test failures.
50 skills · 1 MCP server
Core skills library for Claude Code: TDD, debugging, collaboration patterns, and proven techniques
15 skills · hooks
Reliable automation, in-depth debugging, and performance analysis in Chrome using Chrome DevTools and Puppeteer
8 skills · 1 MCP server
Transform Claude into an Azure expert. This plugin integrates the Azure MCP server and specialized Azure skills to move beyond generic advice. It enables Claude to perform real-world tasks: listing resources, validating deployments, diagnosing infrastructure issues, and optimizing costs across 50+ Azure services.
44 skills · 1 MCP server
Independent auditing for AI agents, open source. Claude discovers your setup, confirms the cost, and audits your agent against the one question other tools skip: is it doing the job it's supposed to do, given your business rules and org structure? Test any model (Anthropic, OpenAI, Gemini, Azure, Bedrock, …) graded by self, one independent judge, or a cross-vendor panel; each provider is billed to its own account via a key in your settings, never the command line. Results render as an interactive artifact (with a static-report fallback).
1 skill · hooks
Orchestrate multi-agent teams for parallel code review, hypothesis-driven debugging, and coordinated feature development using Claude Code's Agent Teams
6 skills · 7 commands · 4 agents
Plan, build, and debug Zoom integrations across REST APIs, Meeting SDK, Video SDK, webhooks, bots, and MCP workflows. Search meetings, retrieve recordings, access transcripts, and design AI-powered Zoom experiences.
44 skills · 3 MCP servers
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