flow

243.4k

facebook

Use when you need to run Flow type checking, or when seeing Flow type errors in React code.

python-type-safety

29.9k

wshobson

Python type safety with type hints, generics, protocols, and strict type checking. Use when adding type annotations, implementing generic classes, defining structural interfaces, or configuring mypy/pyright.

code-reviewer

21.8k

davila7

Comprehensive code review skill for TypeScript, JavaScript, Python, Swift, Kotlin, Go. Includes automated code analysis, best practice checking, security scanning, and review checklist generation. Use when reviewing pull requests, providing code feedback, identifying issues, or ensuring code quality standards.

repo-source-code-review

8.5k

open-circle

Review pull requests and source code changes in /library/src/. Use when reviewing PRs, validating implementation patterns, or checking code quality before merging. Covers code quality checks, type safety, documentation review, test coverage, and common issues to watch for.

build-free-types

4.3k

paulirish

This skill should be used when the user asks to "set up types without a build step", "use vanilla JS with types", "configure erasable syntax", or mentions "JSDoc type checking". It provides instructions for modern type safety using JSDoc in browsers and native TypeScript execution in Node.js.

types-check

2.5k

r-lib

Validate function inputs in R using a standalone file of check_* functions. Use when writing exported R functions that need input validation, reviewing existing validation code, or when creating new input validation helpers.

vue-best-practices

584

oyjt

Vue 3 and Vue.js best practices for TypeScript, vue-tsc, and Volar. This skill should be used when writing, reviewing, or refactoring Vue components to ensure correct typing patterns. Triggers on tasks involving Vue components, props extraction, wrapper components, template type checking, or Volar configuration.

axiom-build-performance

535

Charleswiltgen Axiom Axiom Build Performance

Use when build times are slow, investigating build performance, analyzing Build Timeline, identifying type checking bottlenecks, enabling compilation caching, or optimizing incremental builds - comprehensive build optimization workflows including Xcode 26 compilation caching

check-bounds-safety

462

r3bl-org

Apply type-safe bounds checking patterns using Index/Length types instead of usize. Use when working with arrays, buffers, cursors, viewports, or any code that handles indices and lengths.

Type Theory

376

a5c-ai

Expert skill in type theory foundations for implementing type systems including inference, checking, and subtyping

building-code-checker

376

a5c-ai

Building code compliance checking skill for IBC occupancy, construction type, and area requirements

precommit-setup

196

athola

Configure three-layer pre-commit system with linting, type checking, and testing hooks. Use for quality gate setup and code standards. Skip if pre-commit is optimally configured.

global-validation

188

aiskillstore

Implement comprehensive server-side validation with allowlists, type checking, input sanitization, and consistent error messages, while using client-side validation for user experience. Use this skill when validating user input, form data, API requests, implementing security checks, preventing injection attacks, checking data types/formats/ranges, or providing validation feedback. Apply when working with form validation, API endpoint validation, input sanitization, business rule enforcement, or any code that accepts and validates external data to ensure security, data integrity, and proper user feedback across all entry points.

uloop-get-logs

177

hatayama

Check Unity Console logs. Use when: checking logs, debugging errors, investigating failures, or when user asks about console output. Key options: --log-type (Error/Warning/Log/All), --max-count, --search-text. Retrieves errors, warnings, and Debug.Log messages.

api

144

videojs

API design and developer experience for TypeScript libraries. Use when designing APIs, reviewing architecture, evaluating DX, or checking ergonomics. Covers extensibility, progressive disclosure, type inference, state patterns, and composition. For review, load review/workflow.md. Triggers: "design API", "review API", "check DX", "is this ergonomic", "review architecture", "middleware design", "how does this feel".

next-issue-number

136

oocx

Determine the next available issue number across all change types (feature, fix, workflow) by checking both local documentation and remote branches, then reserve it by pushing an empty branch.

Gleam Type System

98

TheBushidoCollective

Use when gleam's type system including algebraic data types, custom types, pattern matching, generic types, type inference, opaque types, exhaustive checking, and functional error handling for building type-safe Erlang VM applications.

dialyzer-configuration

98

TheBushidoCollective

Use when configuring Dialyzer for Erlang/Elixir type checking and static analysis.

typescript-type-safety

95

pr-pm

Use when encountering TypeScript any types, type errors, or lax type checking - eliminates type holes and enforces strict type safety through proper interfaces, type guards, and module augmentation

gates

87

alfredolopez80

9-language quality gate validation: linting, formatting, type checking, and test execution. Validates code changes meet quality standards before completion. Use when: (1) after code implementation, (2) before PR creation, (3) as part of /orchestrator Step 6, (4) manual quality check. Triggers: /gates, 'quality gates', 'run validation', 'check quality', 'validate code'.

code-review-excellence

85

awesome-skills

Provides comprehensive code review guidance for React 19, Vue 3, Rust, TypeScript, Java, Python, and C/C++. Helps catch bugs, improve code quality, and give constructive feedback. Use when: reviewing pull requests, conducting PR reviews, code review, reviewing code changes, establishing review standards, mentoring developers, architecture reviews, security audits, checking code quality, finding bugs, giving feedback on code.

type-checker-tests

80

purefunctor

Add integration tests for type checker inference and checking functions

TypeScript Strict Mode

50

jhl-labs

TypeScript strict type checking guidelines for SEPilot Desktop. Use when creating types, writing functions, or refactoring code. Ensures all code has explicit types, avoids 'any', and passes type checking with strict mode enabled.

tbd

43

jlevy

Git-native issue tracking (beads), coding guidelines, knowledge injection, and spec-driven planning for AI agents. Drop-in replacement for bd/Beads with simpler architecture. Use for: tracking issues/beads with dependencies, creating bugs/features/tasks, planning specs, implementing features from specs, code reviews, committing code, creating PRs, loading coding guidelines (TypeScript, Python, TDD, golden testing, Convex, monorepo patterns), code cleanup, research briefs, architecture docs, agent handoffs, and checking out third-party library source code. Invoke when user mentions: tbd, beads, bd, shortcuts, issues, bugs, tasks, features, epics, todo, tracking, specs, planning, implementation, validation, guidelines, templates, commit, PR, pull request, code review, testing, TDD, test-driven, golden testing, snapshot testing, TypeScript, Python, Convex, monorepo, cleanup, dead code, refactor, handoff, research, architecture, labels, search, checkout library, source code review, or any workflow shortcut.

checking-files-with-lsp

36

zenobi-us

Use when you need to check, verify, validate or understand code or structure of a file (often code related files or markdown) - automatically detects file type, finds appropriate LSP/linter in mise, and runs validation

codemapper

36

zenobi-us

Use when analyzing codebases for structure, finding symbols, tracing call paths, checking test coverage, or analyzing dependencies - provides instant AST-based code analysis using tree-sitter for Python, JavaScript, TypeScript, Rust, Java, Go, and C

vscode-api

34

confluentinc

Use when the user asks about VS Code API definitions, methods, interfaces, events, types, or wants to understand what VS Code APIs are available. Triggers on questions like "what does vscode.X do", "how to use VS Code API", "VS Code type definition", or checking API compatibility.

code-reviewer

28

Hainamchung Agent Assistant Code Reviewer

Comprehensive code review skill for TypeScript, JavaScript, Python, Swift, Kotlin, Go. Includes automated code analysis, best practice checking, security scanning, and review checklist generation. Use when reviewing pull requests, providing code feedback, identifying issues, or ensuring code quality standards.

console-frontend-review

28

ecto

Reviews React/TypeScript code for the Depot Console web application with focus on real-time rover teleoperation, state management, WebSocket communication, and 3D visualization. Use when reviewing console frontend changes, debugging teleop UI issues, optimizing rendering performance, validating WebSocket protocols, checking React Three Fiber implementations, or evaluating state management patterns. Covers Zustand store architecture, binary protocol encoding, input handling, page visibility safety, memory management, and 360-degree video streaming.

data-validation

27

cosmix

Data validation patterns including schema validation, input sanitization, output encoding, and type coercion. Use when implementing validate, validation, schema, form validation, API validation, JSON Schema, Zod, Pydantic, Joi, Yup, sanitize, sanitization, XSS prevention, injection prevention, escape, encode, whitelist, constraint checking, invariant validation, data pipeline validation, ML feature validation, or custom validators.

code-review

27

Klimabevaegelsen

Activates when reviewing code, checking for security issues, or validating best practices. Use this skill for: security audits, performance reviews, React 19 pattern validation, TypeScript strict mode compliance, and OWASP vulnerability checks. Keywords: review, security, performance, audit, OWASP, vulnerability, best practice, lint

quality-gates

25

NikiforovAll

This skill should be used when the user wants to run code quality checks (linting, formatting, type checking, tests) on the lazyclaude project. Use this skill when asked to "run quality gates", "check the code", "run tests", "lint the code", or verify code quality before committing.

python3-review

23

Jamie-BitFlight

Comprehensive Python code review checking patterns, types, security, and performance. Use when reviewing Python code for quality issues, when auditing code before merge, or when assessing technical debt in a Python codebase.

python-quality-checker

19

matteocervelli

Validate Python code quality with formatting, type checking, linting, and security analysis. Use for Python codebases to ensure PEP 8 compliance, type safety, and code quality.

azure-price

19

openjny

Retrieve Azure service pricing information using the Azure Retail Prices API. Get detailed pricing data including regions, SKUs, and pricing types (consumption, reservation, savings plans) without authentication. Use when estimating Azure costs, comparing prices across regions or SKUs, checking reservation or savings plan pricing, or collecting data for cost analysis and budget management.

typescript-quality-checker

19

matteocervelli

Validate TypeScript/JavaScript code quality with ESLint, Prettier, type checking, and security analysis. Use for TypeScript/JS codebases to ensure code quality and standards.

code-quality-tools

17

uw-ssec

This skill should be used when the user asks to "set up ruff", "configure mypy", "add pre-commit hooks", "fix linting errors", "add type hints", "set up code formatting", "configure linters", "set up CI quality checks", "fix mypy errors", "configure ruff rules", or needs guidance on code quality tools (ruff, mypy, pre-commit), type checking configuration, linting rules for scientific Python, or automated code quality pipelines.

ruby-rbs

16

stevegeek

Comprehensive skill for Ruby RBS type signatures. Use for writing inline type annotations in Ruby files, creating standalone .rbs signature files, scaffolding types, or setting up Steep type checking. Covers both inline syntax (rbs-inline) and standalone RBS file format.

Scientific Reviewer

15

jkitchin

Comprehensive scientific document review and analysis. Use when Claude needs to review scientific papers, reports, preprints, or other research documents for: (1) Identifying and evaluating claims and supporting evidence, (2) Assessing logical argumentation and experimental design, (3) Reviewing citation adequacy and suggesting additional references, (4) Determining document type and research contribution, (5) Checking technical accuracy and methodology, (6) Providing constructive feedback on presentation and clarity. Also handles language, grammar, and formatting review separately.

zod

15

bobmatnyc

TypeScript-first schema validation library with static type inference for form validation, API validation, and runtime type checking with compile-time types.

pydantic

15

bobmatnyc

Python data validation using type hints and runtime type checking with Pydantic v2's Rust-powered core for high-performance validation in FastAPI, Django, and configuration management.

pyright-type-checker

15

bobmatnyc

Pyright is a fast Python type checker from Microsoft with VS Code integration and strict type-checking modes

mypy

15

bobmatnyc

mypy - Static type checker for Python with gradual typing, strict mode, Protocol support, and framework integration

python-code-quality

14

basher83

Python code quality tooling with ruff and pyright. Use when setting up linting, formatting, type checking, configuring ruff or pyright, or establishing code quality standards.

fsharp-shared

14

heimeshoff

Define shared domain types and API contracts for F# full-stack applications using records, discriminated unions, and Fable.Remoting interfaces. Use when starting new features, defining data structures, or creating API contracts shared between client and server. Creates types in src/Shared/Domain.fs and API interfaces in src/Shared/Api.fs. Ensures type safety across the stack with compile-time checking.

pants-format-check

14

RedHat-UX

Runs pants formatting, linting, and type checking on Python code, fixing issues automatically. Use when finishing implementation, before committing code, or when the user asks to format, lint, or check code quality.

validate-segment

13

treasure-data

Validation reference for CDP segment YAML. Lists all 18 operator types, required fields, and error codes. Use alongside the **segment** skill when troubleshooting validation errors from `tdx sg validate` or `tdx sg push --dry-run`, checking operator syntax, or verifying behavior condition structure.

validation

12

itz4blitz

Runs production readiness validation checks. Includes type checking, linting, tests, coverage, security, and dead code detection. Stack-agnostic.