Tests local webapps with Playwright + screenshots
Engineering
Densest vertical: obra superpowers + Cloudflare + Vercel + Sentry + Trail of Bits + Stripe + Hookdeck + Netresearch
65 skills
Creates/edits/evaluates skills
React + Tailwind + shadcn artifacts
Guides creation of MCP servers (Python/TS)
Cowork plugin management: create new Claude plugins from scratch and customize existing ones for an organization.
Engineering plugin: architecture, code review, debugging, testing strategy, system design, tech debt, deploy checklists and incident response.
Partner-built Zoom developer plugin: 40+ skills for Meeting/Video SDKs, OAuth, webhooks, RTMS, Team Chat, Contact Center and Zoom Apps.
Next.js, React Best Practices, Web Design, AccessLint
CodeQL, Semgrep, SARIF parsing toolkit
Architectural context for security audits
Security testing handbook as skills
Sessions, contexts, debug failing automations
Stateful coordinated apps on Workers edge
AI agents on Workers using Agents SDK
Workers CLI: KV, R2, D1, Queues, Workflows
Workers production patterns
Stripe SDK and API version upgrade
Stripe: Checkout vs PaymentIntents, Connect, billing
Sentry SDK skills per language
Generate documentation for codebases that run on AWS.
Task-by-task plan execution with checkpoints
RED-GREEN-REFACTOR enforcement
Skill for writing new Agent Skills properly
Use when starting any conversation - establishes how to find and use skills, requiring skill invocation before ANY response including clarifying questions
Use when completing tasks, implementing major features, or before merging to verify work meets requirements
Fresh subagent per task with two-stage review
Isolated git worktrees with safety verification
Use when facing 2+ independent tasks that can be worked on without shared state or sequential dependencies
Systematic debugging methodology: reproduce, isolate, trace to root cause
Use when receiving code review feedback, before implementing suggestions, especially if feedback seems unclear or technically questionable - requires technical rigor and verification, not performative agreement or blind implementation
Verifies tests, merge/PR/discard options
Use when about to claim work is complete, fixed, or passing, before committing or creating PRs - requires running verification commands and confirming output before making any success claims; evidence before assertions always
GitHub webhook receiver with HMAC verification
Shopify webhooks with HMAC verification
Stripe webhook receivers with verification
Shopify Functions allow developers to customize the backend logic that powers parts of Shopify.
The Admin GraphQL API lets you build apps and integrations that extend and enhance the Shopify admin.
The Payments Apps API enables payment providers to integrate their payment solutions with Shopify's checkout.
The Customer Account API allows customers to access their own data including orders, payment methods, and addresses.
Search Shopify developer documentation across all APIs.
MUST be used first when prompts mention Metafields or Metaobjects.
Use for custom storefronts requiring direct GraphQL queries/mutations for data fetching and cart operations.
The Partner API lets you programmatically access data about your Partner Dashboard, including your apps, themes, and affiliate referrals.
15 skills covering Admin/Storefront/Customer/Partner GraphQL APIs, Functions, Hydrogen, Liquid themes, Polaris UI extensions, and POS UI
Model-invoked Playwright automation
Official Twilio skills and MCP: account/IAM setup, verification and promo advisors, OTP/SMS/SendGrid sending, and security/compliance guardrails
Look up phone number intelligence via Twilio Lookup v2 API.
Twilio Messaging channel overview and onboarding guide.
Send transactional and bulk email via the SendGrid v3 Mail Send API.
Send RCS Business Messages via Twilio.
WhatsApp messaging deep-dive reference.
Build and deploy Twilio Studio flows — visual IVR, SMS/WhatsApp, and conversation automation — by authoring the flow definition JSON and managing it through the Studio REST API.
Planning skill for AI-powered conversational agents.
Build AI-powered voice agents using Twilio ConversationRelay.
Design, secure, and operate Twilio webhook endpoints.
AWS CDK, cost-opt MCP, serverless patterns
Code-review workflow
Architecture/system design workflow
Incident management workflow
Branching, Conventional Commits, PR workflows
PHP 8.x: types, enums, PHPStan, Rector
OWASP audit patterns for PHP
Dockerfile, compose, multi-stage builds
Production Go: testing, Docker, resilience
SLSA, OpenSSF scorecards, SBOMs