Explore skills

Use when you want a dedicated security review of staged or recently changed files — deeper than the security section in /review. Covers OWASP Top 10, secrets exposure, dependency vulnerabilities, and auth gaps. Run before opening a PR on security-sensitive changes.

Use when a file or module has grown too complex — removes unnecessary abstractions, dead code, and over-engineering without changing behavior. Invoke after implementing a feature when the code feels over-engineered.

Use before implementing a complex, high-stakes, or cross-cutting feature — produces a full technical specification including data model, API contract, edge cases, and open questions. The planning layer above /plan. Invoke this when /plan alone isn't detailed enough.

Use when you want to surface accumulated technical debt — scans for TODOs, deprecated APIs, dead code, and code quality issues. Produces a prioritized list with age and estimated effort. Run periodically or before planning a refactor sprint.

Use when you need to document E2E test cases for a feature or bug fix that can't be covered by unit or integration tests alone. Auto-detects ticket from branch name. Reuses codebase context from /plan if already run; falls back to git diff + explorer when invoked standalone. Outputs to a markdown file by default.

Comprehensive reference for LINE Front-end Framework (LIFF) SDK — building web apps inside LINE with authentication, messaging, QR scanning, permanent links, pluggable SDK, and LIFF plugin development. This skill should be used when the user asks to "build a LIFF app", "initialize liff.init()", "send messages from LIFF", "use Share Target Picker", "scan a QR code in LIFF", "create a permanent link

Comprehensive reference for LINE Login (OAuth 2.1) — authorization code flow, PKCE, token management, ID token JWT verification, user profiles, bot linking, and login button design. This skill should be used when the user asks to "implement LINE Login", "add Log in with LINE", "set up OAuth authorization flow", "verify an ID token", "refresh an access token", "link a bot to login", "design a login

Comprehensive reference for LINE MINI App — Service Messages, Common Profile Quick Fill, In-App Purchase, Console setup (3 internal channels), submission review, and performance guidelines for web apps running inside LINE as an enhanced LIFF platform. This skill should be used when the user asks to "build a LINE MINI App", "send a service message", "set up Common Profile Quick Fill", "implement in

Reference for LINE Notification Messages — phone-number-based messaging to non-friends, template type (premade layouts) and flexible type (custom Flex Message), delivery completion webhooks, user consent flow, SMS authentication, and billing. Use when the user asks to "send a notification message via phone number", "hash a phone number for PNP", "handle delivery completion webhook", "set up templa

Comprehensive reference for LINE Messaging API — webhook setup, message sending, Flex Message design, Rich Menu management, audience targeting, insights, coupons, and channel access tokens. This skill should be used when the user asks to "build a LINE Bot", "set up a webhook", "send a push message", "design a Flex Message", "create a Rich Menu", "manage audience targeting", "get messaging insights

Debug common ML training issues (NaN loss, OOM, slow training, convergence problems) and provide solutions. Use when training fails, metrics don't improve, or encountering errors like NaN loss, CUDA OOM, or slow convergence.

Comprehensive guide for PyTorch Lightning - LightningModule, Trainer, distributed training, PyTorch 2.0 torch.compile integration, Lightning Fabric, and production best practices