Build LiveView: async data (assign_async), PubSub (check connected?), phx-change events, form components/modals/uploads, streams for lists, live_patch. Use when handling interactions, debugging events, or tracking Presence.

Quick reference for Tailwind CSS utility patterns, responsive design, and configuration. Triggers on: tailwind, utility classes, responsive design, tailwind config, dark mode css, tw classes.

CoinGecko API documentation - cryptocurrency market data API, price feeds, market cap, volume, historical data. Use when integrating CoinGecko API, building crypto price trackers, or accessing cryptocurrency market data.

PostgreSQL database documentation - SQL queries, database design, administration, performance tuning, and advanced features. Use when working with PostgreSQL databases, writing SQL, or managing database systems.

TimescaleDB - PostgreSQL extension for high-performance time-series and event data analytics, hypertables, continuous aggregates, compression, and real-time analytics

This sub-skill guides systematic troubleshooting of Firebase development issues. It handles emulator problems, rules violations, function errors, auth issues, and deployment failures.

This skill should be used to update terminal window title with context. Triggers automatically at session start via hook. Also triggers on topic changes during conversation (debugging to docs, frontend to backend). Updates title with emoji + project + current topic.

Apply structured thinking before coding. Use when: starting new features, making architectural decisions, refactoring large components, or evaluating implementation approaches. Includes Musk's 5-step algorithm and ICE scoring framework.

Debug WebSocket connection issues between CLI and FigJam plugin. Use when diagrams aren't syncing or connection fails.

FigJam plugin development workflow. Use when working on plugin code (code.ts, ui.ts), debugging WebSocket communication, or building the plugin.

Operates and debugs the local stack (API/worker/frontend); focuses on observability, logs, and safe automation.

Primary instruction manual for working within the ancplua-claude-plugins monorepo. Use when creating, modifying, or debugging plugins in this repository.

systematic-debugging

Design tools that agents can use effectively. Use when creating new tools for agents, debugging tool-related failures, or optimizing existing tool sets.

Use when building or debugging WordPress Interactivity API features (data-wp-* directives, @wordpress/interactivity store/state/actions, block viewScriptModule integration) including performance, hydration, and directive behavior.

Use when investigating or improving WordPress performance (backend-only agent): profiling and measurement (WP-CLI profile/doctor, Server-Timing, Query Monitor via REST headers), database/query optimization, autoloaded options, object caching, cron, HTTP API calls, and safe verification.

Expert SQL query writing, optimization, and database schema design with support for PostgreSQL, MySQL, SQLite, and SQL Server. Use when working with databases for: (1) Writing complex SQL queries with joins, subqueries, and window functions, (2) Optimizing slow queries and analyzing execution plans, (3) Designing database schemas with proper normalization, (4) Creating indexes and improving query performance, (5) Writing migrations and handling schema changes, (6) Debugging SQL errors and query issues

Debug React Native apps including metro bundler issues, native errors, performance problems, and crash analysis. Use when troubleshooting errors or investigating issues.

Per-call and aggregated latency tracking for MEV infrastructure. Use when implementing performance monitoring or debugging slow operations. Triggers on: latency, timing, performance, slow, speed, instrumentation.

Validates system integration before deployment. Use when checking ports, database connections, frontend-backend APIs, or debugging blocked/stuck workflows. Detects dead ends, bottlenecks, circular dependencies.

Use when the user asks why something happened, what’s wrong, root cause analysis, debugging, or incident explanation.

High-performance PostgreSQL patterns. Use when optimizing queries, designing for scale, or debugging performance issues.

Async/await patterns for FastAPI and SQLAlchemy. Use when working with async code, database sessions, concurrent operations, or debugging async issues in Python.

Observability patterns for Python backends. Use when adding logging, metrics, tracing, or debugging production issues.

SQLModel and async SQLAlchemy patterns. Use when working with database models, queries, relationships, or debugging ORM issues.

Async/await correctness in React with Zustand. Use when debugging race conditions, missing awaits, floating promises, or async timing issues. Works for both React web and React Native.

Logging, error messages, and debugging patterns for React. Use when adding logging, designing error messages, debugging production issues, or improving code observability. Works for both React web and React Native.

Performance optimization for React web applications. Use when optimizing renders, implementing virtualization, memoizing components, or debugging performance issues.

Zustand state management patterns for React. Use when working with Zustand stores, debugging state timing issues, or implementing async actions. Works for both React web and React Native.

Async/await correctness in React Native with Zustand. Use when debugging race conditions, missing awaits, floating promises, or async timing issues in Expo/React Native apps.

React Native authentication patterns for Expo apps. Use when implementing login flows, Google/Apple sign-in, token management, session handling, or debugging auth issues in Expo/React Native.

Logging, error messages, and debugging patterns for React Native. Use when adding logging, designing error messages, debugging production issues, or improving code observability.

Performance optimization for React Native. Use when optimizing lists, preventing re-renders, memoizing components, or debugging performance issues in Expo/React Native apps.

Zustand state management patterns for React Native. Use when working with Zustand stores, debugging state timing issues, or implementing async actions in Zustand.

Systematic error diagnosis and resolution using first-principle analysis. Use when encountering any error message, stack trace, or unexpected behavior. Supports replay functionality to record and reuse solutions.

Reference for all AI tools available in DBX Studio's AI chat system. Use when adding, modifying, or debugging AI tool definitions, tool execution, or provider integrations.

Expert SQL query generation for DBX Studio. Use when writing, optimizing, or debugging SQL queries against user database connections.

用于需要通过命令行操作真实浏览器实例进行前端调试（如导航、执行 JS、截图、元素拾取、控制台日志）且希望跨多次命令复用同一浏览器会话的场景。

Get Image [from] Internet Link - Zero-setup CLI for downloading full-resolution images from iCloud, Dropbox, Google Photos, and Google Drive share links. Four-tier capture strategy, browser automation, HEIC conversion, album support. Node.js/Playwright.

4-phase systematic debugging for flow-fix. NO FIXES WITHOUT ROOT CAUSE INVESTIGATION FIRST.

Auto-escalate reasoning depth for complex problems. Use proactively when encountering architecture, debugging, or unfamiliar code.

Debug ML training issues and optimize performance including loss divergence, overfitting, and slow convergence

when-validating-code-works-use-functionality-audit

Create and manage Claude Code skills with auto-activation, progressive disclosure, and memory patterns. Use when creating skills, modifying skill-rules.json, understanding triggers (keywords, intent, file, content), working with hooks (UserPromptSubmit, PreToolUse, Stop), debugging activation, implementing guardrails, or building memory-aware skills that persist context across sessions. Covers 500-line rule, session tracking, enforcement levels (block, suggest, warn), plan-approval workflows, and best practices.

Implement JSON-based structured logging for observability. Use when setting up logging, debugging production issues, or preparing for log aggregation (ELK, Datadog). Covers log levels, context, and best practices.

Allows to interact with web pages by performing actions such as clicking buttons, filling out forms, and navigating links. It works by remote controlling Google Chrome or Chromium browsers using the Chrome DevTools Protocol (CDP). When Claude needs to browse the web, it can use this skill to do so.

Master receipt scanning operations including parsing, debugging, enhancing accuracy, and database integration. Use when working with receipts, images, OCR issues, expense categorization, or troubleshooting receipt uploads.

This skill is a practical, 'use-it-while-debugging' reference for getting a LiveKit + Letta voice agent working reliably.

Tutorial for debugging CUDA crashes using API logging

Write, optimize, and debug T-SQL queries for Microsoft SQL Server. Covers CTEs, window functions, PIVOT, MERGE, APPLY operators, execution plan analysis, indexing strategies, and stored procedures. Use when working with SQL Server, T-SQL scripts, .sql files, stored procedures, query optimization, or database performance tuning.