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Audio analysis with Tone.js and Web Audio API including FFT, frequency data extraction, amplitude measurement, and waveform analysis. Use when extracting audio…

Expert in error handling patterns, exception management, error responses, logging, and error recovery strategies for React, Next.js, and NestJS applications

Use when you need to refactor Java code to adopt modern Java features (Java 8+) — including migrating anonymous classes to lambdas, replacing Iterator loops…

Use when you need to review, improve, or write Java unit tests — including migrating from JUnit 4 to JUnit 5, adopting AssertJ for fluent assertions,…

Build Chrome extensions using WXT framework with TypeScript, React, Vue, or Svelte. Use when creating browser extensions, developing cross-browser add-ons, or…

Advanced exploratory testing techniques with Session-Based Test Management (SBTM), RST heuristics, and test tours. Use when planning exploration sessions,…

Use when you need to review, improve, or refactor Java code for generics quality — including avoiding raw types, applying the PECS (Producer Extends Consumer…

Sequential reasoning with deep self-reflection and backtracking. Use when problems have step-by-step dependencies, need careful logical reasoning, or require…

Defines measurable performance budgets for bundle size, API latency, database queries, and render times. Provides enforcement strategies and monitoring plans.…

Creates isolated container environments for testing local uncommitted changes before pushing. Use when testing library changes, multi-repo coordination, or validating "works on my machine" → "works in CI". Provides git bundle snapshots, embedded git server, selective URL rewriting, and package manager cache isolation. Works with any coding agent via standalone CLI, shell scripts, or Docker Compose.

使用Puppeteer（Google）进行浏览器自动化和PDF生成。支持无头Chrome控制，用于网页爬虫、截图、PDF生成和自动化测试。

Design and maintain TypeScript packages in a monorepo, including exports and build configuration.

Provides complete shadcn/ui component library patterns including installation, configuration, and implementation of accessible React components. Use when…

Design and test distributed-system resilience. Use when adding retries, circuit breakers, chaos experiments, or SLO-based reliability gates.

Use when optimizing conversion rates, designing A/B tests, or improving landing pages. Covers A/B testing methodology, landing page optimization, form design,…

Best practices for building integrations with NetBox REST and GraphQL APIs. Use when building NetBox API integrations, reviewing integration code,…

Create beautiful terminal output with Rich library including tables, progress bars, panels, and syntax highlighting. Use when building CLI applications or…

Next.js 15 App Router patterns. Trigger: When working with Next.js - routing, Server Actions, data fetching.

Bitcoin rune operations — check rune balances, list rune-bearing UTXOs, and transfer runes between addresses with Runestone OP_RETURN encoding. Uses the Unisat…

Nostr Web of Trust — trust scoring and sybil detection for Nostr pubkeys. Free tier (wot.klabo.world, 50 req/day) with paid fallback (maximumsats.com, 100 sats…