Build Rust code with proper error handling and optimization for development, testing, and production.
Deliberate TDD-first, design-heavy workflow for building an Elixir/Phoenix change end-to-end — surface rival designs, pick one, drive red→green, keep the test suite lean.
Connect coding agents to Xcode build, test, simulator, and project-inspection tools through XcodeBuildMCP's MCP server or CLI.
Use pgrx when an agent needs the Rust-native extension lifecycle for PostgreSQL, including local builds, test runs, and packaging across PostgreSQL versions.
Automatically builds and tests code changes. Use whenever code is modified, tests fail, before creating pull requests, or when verifying code quality.
Best practices, patterns, and examples for building goal-driven agents. Includes pause/resume architecture, hybrid workflows, anti-patterns, and handoff to testing.
Build AI agents with Pydantic AI — tools, capabilities (including on-demand loading), structured output, streaming, testing, and multi-agent patterns.
Structures systematic trading strategy development with signal generation, backtesting, and validation.
Collaboratively build and refine paper screening rubrics through brainstorming, test-driven development, and iterative feedback
Walk Claude through PyDESeq2-based differential expression, including ID mapping, DE testing, fold-change thresholding, and enrichment visualisation.
Walk Claude through PyDESeq2-based differential expression, including ID mapping, DE testing, fold-change thresholding, and enrichment visualisation. — from bg-szy/TOP-SKILLS
Audit a codebase's test suite for tests that pass for no good reason — no assertions, tautologies, assertions on mocks only, swallowed exceptions, unawaited async assertions,…
Build production-grade CLI tools with Bun. Reference implementation covering argument parsing patterns (--flag value, --flag=value, --flag), dual markdown/JSON output, error…
Modern JavaScript/TypeScript development with Bun runtime. Covers package management, bundling, testing, and migration from Node.js.
Bun runtime patterns and best practices. Package management, bundling, testing, scripts. Use when working with Bun as the JavaScript runtime.
Expert guide for Bun JavaScript/TypeScript runtime. Use when building, testing, or deploying applications with Bun / Panduan ahli untuk runtime JavaScript/TypeScript Bun.
Configure Bun's built-in test runner with Jest-compatible APIs. Use when setting up testing infrastructure, writing unit/integration/snapshot tests, migrating from Jest, or…
Use for bun:test syntax, assertions, describe/it, test.skip/only/each, and basic patterns.
Use for test coverage with Bun, --coverage flag, lcov reports, thresholds, and CI integration.
Use for test lifecycle hooks: beforeAll, afterAll, beforeEach, afterEach, fixtures, preload.
Use for mock functions in Bun tests, spyOn, mock.module, implementations, and test doubles.
C testing patterns: Unity framework (TEST_ASSERT_*), CMocka mocking with __wrap_ and linker flag, Valgrind leak checking, AddressSanitizer, CMake CTest integration, test…
Implement production-grade caching with cache keys/TTLs/consistency classes per query, SWR (stale-while-revalidate), explicit invalidation, HTTP cache headers, and compre — from…
Computes VaR using parametric, historical simulation, and Monte Carlo methods with backtesting validation.
Camoufox is an open source anti-detect browser built on Firefox that provides robust fingerprint injection and anti-bot evasion for Python automation workflows.
Design optimal Facebook/Meta campaign structure for testing including ABO vs CBO, ad set organization, targeting, and budget allocation.
Given a feature description, function signature, or existing test suite, surfaces edge cases worth testing across six categories. Explanation depth scales to user skill level.
Use when verifying or debugging behavior that only manifests in the running Electron app — title-bar / window-control overlay, mount-time focus, keyboard shortcuts that depend on…
Configure CI/CD pipelines for Canva Connect API integrations with GitHub Actions. Use when setting up automated testing, configuring CI pipelines, or integrating Canva API tests…
Create a minimal working Canva Connect API example. Use when starting a new Canva integration, testing your setup, or learning basic Canva REST API patterns.
Implement Canva Connect API load testing, auto-scaling, and capacity planning. Use when running performance tests, planning capacity around Canva rate limits, or scaling Canva…
Configure Canva Connect API local development with hot reload and mock server. Use when setting up a development environment, testing OAuth flows locally, or establishing a fast…
Visual regression for canvas-rendered matrix progressions. Tests filmstrip strips that show how 2D data evolves visually over time.
Guides the agent through creating and maintaining Capacitor plugins from scratch. Covers scaffolding a new plugin project, designing the TypeScript API, implementing native iOS…
Generates Capybara E2E tests in Ruby with RSpec integration. Acceptance testing DSL for web apps. Use when user mentions "Capybara", "visit", "fill_in", "click_button", "Ruby…
Build CarPlay-enabled apps using the CarPlay framework. Use when creating navigation, audio, communication, EV charging, parking, or food ordering apps for the car display,…
Builds Karrio shipping carrier integrations from scratch. Covers scaffolding, schema generation, provider implementation (rating, shipping, tracking, pickup, manifest, document…
Evaluates Catz Android coding challenge submissions against SWORD Health requirements. Use when reviewing or assessing this coding challenge.
Run CDK validation, security scanning, build, test, and deployment. Use when the user asks to test CDK code, validate CDK configurations, run CDK checks, or deploy CDK to a dev…
Run browser tests on pages affected by current PR or branch — from EveryInc/compound-engineering-plugin
Use when running a systematic test sweep of the cella worktree/task system from inside a container. Also use after modifying the daemon, agent CLI, or task manager, before…
Run a health check on CenterTest Java projects — analyze code quality, test automation patterns, and framework compliance. Generates Excel reports with configurable rules.
Conduct a CFO-perspective financial impact review of a codebase. Analyzes infrastructure costs and scaling projections, pricing model alignment with architecture, build-vs-buy…
（内部子 skill，仅由 fullstack-builder 主 skill 通过 Read 调用，不应被顶层直接触发）fullstack-builder 的改动归档子 skill。在 self-review loop 通过后基于 git diff + 需求.md + 代码产出 改动.md（严格按…
Classify a change set as behavior vs structure, then recommend the correct PR label (change:behavior or change:structure) and the appropriate local/CI checks.
Chaos engineering analysis that maps every external dependency and I/O boundary, then generates tests for timeouts, connection failures, corrupt responses, disk errors, OOM,…
Use when implementing chaos engineering, designing fault injection experiments, or building resilience testing practices. Covers chaos principles and experiment design.
Chaos engineering principles, controlled failure injection, resilience testing, and system recovery validation.
Chaos engineering principles, controlled failure injection, resilience testing, and system recovery validation.
Use when designing or implementing chaos engineering experiments to verify system resilience under failure conditions.
Create tests that describe what legacy code actually does (not what it should do) as safety net before refactoring
Construye chatbots de alto rendimiento para chatbot ab testing con dialogo robusto, guardrails claros y monitoreo continuo de calidad.
Validates an in-progress PR or feature branch of dart_skills_lint against known downstream ecosystem consumers.
Deploy validation and reality-testing consciousness mode. Use when need to find edge cases, test assumptions, catch fatal flaws before they're expensive.
Expertise in generating domain-specific quality checklists for specifications. Activates when user discusses quality validation or requirement testing.
Configure Playwright test suites with Checkly including playwright.config.ts integration, multiple projects, and full test suite deployment.
Master Chicago TDD (state-based testing). Create tests that verify observable behavior with real collaborators. Use chicago-tdd-tools 1.4.0 AAA pattern.
Implements strict data minimization and retention limits for children''s personal data under GDPR Art. 5(1)(c), Recital 38, UK AADC Standard 8, and COPPA Section 312.7.
Browser automation with two integrations - Chrome DevTools MCP (always available, performance tracing) and Claude-in-Chrome extension (authenticated sessions, GIF recording).
Control Chrome browser programmatically using chrome-devtools-mcp. Use when user asks to automate Chrome, debug web pages, take screenshots, evaluate JavaScript, inspect network…