Development

Context-efficient browser automation using Playwright scripts and subagent isolation. Use when you need to interact with web pages, extract data from websites, verify page elements, or automate browser tasks while avoiding context window pollution from verbose HTML/accessibility trees. Provides both direct script execution and a specialized subagent pattern for complex investigations that generate large intermediate responses.

Frontend coding standards, component patterns, and design system for the Guessimate Angular UI. Reference when writing or reviewing frontend code.

Also called "wr". Optional research agent for broad multi-source research without polluting context. Use when user requests it or when research needs depth across many sites.

Regulatory guidance for U.S. mortgage servicing software. Use when working with loan data models, payment processing, loss mitigation workflows, compliance timelines, or questions about RESPA, TILA, FCRA, GSE requirements, or mortgage servicing regulations.

Modern patterns for Next.js 16 and TanStack Start v1

Use when working with Next.js App Router tasks - creating pages in /app/, setting up dynamic routes ([id]/page.tsx), implementing nested layouts/templates (layout.tsx), optimizing Server/Client components, or building ERP role-based pages (admin/teacher/student dashboards). Auto-use for all /app/ directory operations, dynamic routing, and App Router-specific features.

Searches GitHub repositories for code examples matching job requirements or technologies. Returns portfolio findings grouped by technology with recommendations for resume, cover letter, and interview preparation.

Explains code with visual diagrams and analogies. Use when explaining how code works, teaching about a codebase, or when the user asks "how does this work?"

Human-in-the-loop iterative development. Use when requirements will emerge during implementation, decisions need human approval at each step, or work will span multiple sessions with frequent feedback loops. Creates problem statement, decisions log, runbook, and progress tracking.

WHEN: README generation/update, project documentation, installation/usage/contribution guidesWHAT: Project analysis + sectioned README templates + badges + environment variable docsWHEN NOT: API docs → api-documenter, Code comments → api-documenter

AI-powered enterprise performance optimization orchestrator with Context7 integration, Scalene AI profiling, intelligent bottleneck detection, automated optimization strategies, and predictive performance tuning across 25+ programming languages

Default Python stack for Lambda: uv + Astral tools, typed code, schemas, and Hypothesis.

Comprehensive research skill using Exa AI tools for web search and code context retrieval. Use when conducting research on technologies, finding code examples, discovering latest tools, or gathering comprehensive information on any topic. Combines web search for articles/news with code search for implementation examples.

Your approach to handling global naming. Use this skill when working on files where global naming comes into play.

End-of-session summary that logs work completed to Obsidian. Run this at the end of any Claude Code session to capture what you accomplished. Creates or appends to the daily session log.

Run in-session task loops via the codex-taskloop-plugin MCP server and stop hook.

Master data science fundamentals. Learn Python for data, statistics, pandas, data visualization, and exploratory data analysis.

IndexedDB patterns for local-first state persistence using the idb library. Use when implementing features that require persistent state across navigation and sessions. Covers data modeling, defaults, CRUD operations, state managers, and reset patterns. Integrates with web-components for reactive UI updates.

Comprehensive Android device control via ADB (Android Debug Bridge). Use when user asks about: Android device management, app installation/uninstallation, APK operations, package management, file transfer (push/pull), screenshots, screen recording, input simulation (tap/swipe/text/keyevents), shell commands, logcat viewing, device info (battery/memory/storage), automation scripts, wireless ADB connection, scrcpy mirroring. Keywords: adb, android, phone, tablet, device, apk, install app, uninstall app, screenshot, screen record, tap, swipe, type text, keyevent, logcat, push file, pull file, shell, package, activity, intent, broadcast, dumpsys, getprop, settings, input, sendevent, monkey, am start, pm list, device info, battery status, wireless adb, connect device.

Design error types using thiserror for libraries and anyhow for applications. Use when defining error hierarchies or handling fallible operations.