发现 Skills

Harmonic analysis, voice-leading, chord function, and modulation techniques for tonal music. Covers triads, seventh chords, Roman-numeral analysis, figured-bass notation, voice-leading rules, cadence types, secondary dominants, modulation methods, chromatic harmony (Neapolitan and augmented-sixth sonorities), jazz lead-sheet notation, and functional vs. linear harmonic thinking. Use when analyzing chord progressions, writing voice-leading, identifying key areas, or interpreting harmonic function in any tonal style.

Embedded firmware development for microcontrollers including memory-mapped I/O, GPIO, interrupts, timers, UART/SPI/I2C serial protocols, PWM generation, ADC sampling, interrupt-driven versus polled architectures, RTOS fundamentals, and the bring-up sequence from power-on reset through first printf. Covers AVR/Arduino, ARM Cortex-M, and ESP32 patterns. Use when writing, porting, debugging, or reviewing firmware that directly manipulates hardware peripherals.

Metallurgy of the major nonferrous structural and engineering alloys — aluminum, copper, titanium, nickel, magnesium, and their strengthening mechanisms. Covers precipitation (age) hardening in Al-Cu and Al-Zn-Mg systems, solid-solution strengthening in brass and bronze, alpha-beta titanium, nickel superalloys with gamma-prime, and the trade-offs in density, strength, corrosion resistance, and cost that decide when to leave steel for a lighter or more specialized metal.

Classical root cause analysis techniques for quality improvement and incident investigation. Covers 5 Whys (with Card's 2017 critique and boundary conditions), Ishikawa/fishbone diagrams, Fault Tree Analysis (FTA), Failure Modes and Effects Analysis (FMEA), Cause Mapping, and Doggett's method-selection framework. Use when investigating a failure, running a post-incident analysis, building a fishbone, calculating fault tree cut sets, running an FMEA pass, or deciding which classical technique fits the problem. Not suitable alone for complex socio-technical failures — escalate to rca-systems-theoretic or rca-causal-inference when the incident has multiple interacting causal chains.

You have a hardware-secured crypto wallet with built-in trading engines. Invoke this skill for any crypto, wallet, or blockchain operation: checking balances, sending tokens, DEX swaps (0x, 10 chains), Hyperliquid perps/spot trading, Polymarket predictions, smart contract execution, message signing (EIP-191/712), x402 HTTP payments, on-chain identity (ERC-8004), or E2E encrypted agent-to-agent messaging (TAP). Trigger keywords: wallet, crypto, payment, transfer, balance, swap, trade, DeFi, perps, futures, Hyperliquid, Polymarket, staking, lending, x402, Safe, ERC-4337, blockchain, tigerpass, smart contract. Requires Apple Silicon Mac.

Write step-by-step tutorial articles for marvinzhang.dev following a 3-stage workflow (Outline → Writing → Refine). Use for how-to guides, implementation tutorials, and practical walkthroughs. Produces clear, actionable bilingual content with minimal code. Requires blog-common skill.

Use when user wants to compare two autonomy branches to see different approaches, metrics, and outcomes

Component skill for systematic data profiling and exploration in DataPeeker analysis sessions

Modern Node.js backend stack: NestJS/Hono, Drizzle ORM, Vitest, TypeScript. Use when: building Node.js APIs, TypeScript backends, or serverless functions. Triggers: "nestjs", "node backend", "express", "hono", "drizzle", "vitest", "typescript api", "node api", "bun".

Lesson content for Claude Code Course. Use when: loading lesson content. Internal Skill - contains lesson files.

Use when errors occur deep in execution and you need to trace back to find the original trigger — systematically traces bugs backward through the call stack to identify the source of invalid data

Use this skill to analyze an existing PostgreSQL database and identify which tables should be converted to Timescale/TimescaleDB hypertables. **Trigger when user asks to:** - Analyze database tables for hypertable conversion potential - Identify time-series or event tables in an existing schema - Evaluate if a table would benefit from Timescale/TimescaleDB - Audit PostgreSQL tables for migration to Timescale/TimescaleDB/TigerData - Score or rank tables for hypertable candidacy **Keywords:** hypertable candidate, table analysis, migration assessment, Timescale, TimescaleDB, time-series detection, insert-heavy tables, event logs, audit tables Provides SQL queries to analyze table statistics, index patterns, and query patterns. Includes scoring criteria (8+ points = good candidate) and pattern recognition for IoT, events, transactions, and sequential data.

Optimize RAG performance with reranking, caching, parallel processing, and production deployment patterns. Use when improving retrieval quality, adding rerankers, deploying to production, implementing caching strategies, or optimizing for scale and latency.

Monitors, approves, and rejects Turnkey activities (the canonical result type returned by every submit endpoint): check status, list and filter activities, approve/reject within consensus workflows, and verify cryptographic proofs for audits. Includes patterns for root, admin, and automated-agent approvers.

Resolve PR review feedback from CodeRabbit and Gemini using the gh CLI. Use when asked to fetch AI review comments, summarize unresolved items in Japanese, implement fixes, manually resolve Gemini review threads, push changes, and request a new Gemini review with /gemini review.

Long-running iterative development loops with pacing control and verifiable progress. Use when tasks require multiple iterations, many discrete steps, or periodic reflection with clear checkpoints; avoid for simple one-shot tasks or quick fixes.

Implement multi-language support in Svelte apps using svelte-i18n with dynamic locale switching, namespace organization, and production patterns for SvelteKit

Explain HTTP status codes with examples and best practices. Use when working with APIs, debugging HTTP responses, or learning about REST API design and HTTP protocol.

Interact with X/Twitter via the x-cli terminal client using official X API credentials. Use for posting, reading timelines, searching tweets, liking, retweeting, bookmarks, mentions, and user lookups.

Automates browser interactions for web testing, form filling, screenshots, and data extraction. Use when the user needs to navigate websites, interact with web pages, fill forms, take screenshots, or extract information from web pages.

Add or update translations for a VitePress blog's multilingual configuration (src/.vitepress/config.ts). Use this skill when the user mentions 'add new tool', 'update keywords', 'translate', 'multilingual', 'i18n', or 'add feature description'. Responsible for synchronously updating the description and keywords across all 20 languages, and for updating the zh-CN UI text when necessary.

Use when executing implementation plans with independent tasks — orchestrates a team of specialist agents working in parallel

Create and edit ShaderGraph and RealityKit material networks in .usda files. Use when manually editing USD ASCII files to build, modify, or troubleshoot materials, shader nodes, and connections for RealityKit.

A highly specialized skill designed to audit and optimize a Territorial Intelligence NotebookLM workspace (specifically focused on Southwest Mallorca Real Estate, Luxury Market, Tourism, and Urban Development).