Coding & Dev Tools

Perceives, indexes, and edits video and audio from files, URLs, and live streams, with search, timeline editing, overlays, subtitles, and real-time alerts.

Answers questions about a codebase by searching and reading source files, then synthesizing answers with inline citations and a key files table.

Writes and reviews defensive Bash scripts for automation, CI/CD, and system utilities, emphasizing safety, portability, and testability.

Provides structured debugging guidance for errors, test failures, and unexpected behavior, including root cause analysis and verification steps.

Guides Firebase development with best practices for security rules, data modeling, and avoiding common pitfalls.

Practical patterns for using fp-ts with React: Option for optional state, Either for form validation, TaskEither for data fetching, and RemoteData for async state management.

Provides expert guidance on modern Java 21+ development, covering virtual threads, Spring Boot 3.x, JVM optimization, and cloud-native enterprise patterns.

Creates walkthrough videos from Stitch project screens using Remotion, with transitions, zoom effects, and text overlays.

Provides reference documentation and code patterns for using Biopython to handle biological sequences, file formats, database access, alignments, structures, and phylogenetics.

Enables continuous self-improvement of Makepad development skills by capturing reusable patterns, correcting errors, and validating content.

Handle errors as values using fp-ts Either and TaskEither to write cleaner, more predictable TypeScript code.

Provides expert guidance on modern Julia 1.10+ development, covering performance optimization, multiple dispatch, testing, and production-ready practices.

Create pull requests following Sentry's engineering practices, including drafting descriptions, titles, and issue references.

Build full-stack web applications with SvelteKit, covering file-based routing, SSR, SSG, API routes, and form actions.

Provides opinionated, evolving constraints to guide agents when building interfaces.

Records polished UI demo videos of web applications using Playwright, with an injected cursor overlay, natural pacing, and a discover-rehearse-record workflow.

Batch-converts UI design screenshots into Vue 3 Composition API components using Vant, Element Plus, or Ant Design Vue, with router wiring and shared component extraction.

Design consistent REST APIs with resource naming, status codes, pagination, filtering, error responses, versioning, and rate limiting.

Write Django tests using pytest-django, factory_boy, and TDD, covering models, views, and DRF APIs.

Writes and maintains C++ tests with GoogleTest/GoogleMock, configures CMake/CTest, diagnoses failures, and adds coverage or sanitizers.

Provides Playwright E2E testing patterns including Page Object Model, configuration, CI/CD integration, artifact management, and strategies for handling flaky tests.

Guides test-driven development for Laravel apps using PHPUnit and Pest, covering factories, database testing, fakes, and coverage targets.

Formal evaluation framework for Claude Code sessions implementing eval-driven development (EDD) principles.

Write and run Perl tests using Test2::V0, Test::More, prove, mocking, and Devel::Cover with a TDD workflow.

Enforces test-driven development with 80%+ coverage including unit, integration, and E2E tests for new features, bug fixes, and refactoring.

Guides creation of hookify rules with YAML frontmatter, regex patterns, and event types for Claude Code hooks.

Apply modern Perl 5.36+ idioms, best practices, and conventions for building robust, maintainable applications.

Secure Perl applications against injection, taint, and web vulnerabilities with validated patterns for input handling, file operations, process execution, and DBI queries.

Guides writing behavior-focused React component and hook tests with React Testing Library, Vitest/Jest, MSW network mocking, and axe accessibility assertions, including when to use component vs end-to-end tests.

Provides C# and .NET testing patterns using xUnit, FluentAssertions, mocking, integration tests, and test organization best practices.

Provides F# testing patterns using xUnit, FsUnit, Unquote, FsCheck, and integration testing with Testcontainers and WebApplicationFactory, including test organization and anti-patterns.

Write reliable Go tests using table-driven tests, subtests, benchmarks, fuzzing, and coverage, following TDD with idiomatic patterns.

Write reliable Kotlin tests using Kotest, MockK, coroutine testing, property-based testing, and Kover coverage, following a TDD workflow.

Provides idiomatic React 18/19 patterns for hooks, server/client components, Suspense, error boundaries, forms, data fetching, state management, and accessibility-first composition.

Guides test-driven development for Spring Boot services with JUnit 5, Mockito, MockMvc, Testcontainers, and JaCoCo, covering unit, web, integration, and persistence tests.

Hardens Django applications against common vulnerabilities with production settings, authentication, authorization, SQL injection and XSS prevention, and secure deployment configurations.