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Found 845 Skills
Use when driving a website with opencli browser and sitemap context is available, requested, or needed to avoid blind navigation. Guides agents to consume site sitemap files lazily, choose adapter/browser fallback paths, resume from state signatures, and mark stale sitemap entries without trusting them over live browser state.
Detects timing side-channel vulnerabilities in cryptographic code. Use when implementing or reviewing crypto code, encountering division on secrets, secret-dependent branches, or constant-time programming questions in C, C++, Go, Rust, Swift, Java, Kotlin, C#, PHP, JavaScript, TypeScript, Python, or Ruby.
Usability heuristics and principles based on Steve Krug's "Don't Make Me Think" and Jakob Nielsen's 10 heuristics. Use when you need to: (1) audit a UI for usability problems, (2) identify why users are confused or frustrated, (3) simplify navigation and information architecture, (4) conduct heuristic evaluations, (5) prioritize UX fixes by severity, (6) review designs before development, (7) improve form usability, (8) validate that interfaces follow established UX principles.
Enforce language-specific coding standards (Python/TS/JS/Go/Rust/C/C++) + PR/commit conventions.
Use when creating animations for business contexts that require seriousness, competence, and trustworthy presentation.
Audit an LLM eval pipeline and surface problems: missing error analysis, unvalidated judges, vanity metrics, etc. Use when inheriting an eval system, when unsure whether evals are trustworthy, or as a starting point when no eval infrastructure exists. Do NOT use when the goal is to build a new evaluator from scratch (use error-analysis, write-judge-prompt, or validate-evaluator instead).
CORS misconfiguration testing playbook. Use when analyzing cross-origin trust, credentialed browser reads, origin reflection, preflight policy bugs, and browser-based access to authenticated APIs.
Implement memory-safe programming with RAII, ownership, smart pointers, and resource management across Rust, C++, and C. Use when writing safe systems code, managing resources, or preventing memory bugs.
Production-grade backend service development across Node.js (Express/Fastify/NestJS/Hono), Bun, Python (FastAPI), Go, and Rust (Axum), with PostgreSQL and common ORMs (Prisma/Drizzle/SQLAlchemy/GORM/SeaORM). Use for REST/GraphQL/tRPC APIs, auth (OIDC/OAuth), caching, background jobs, observability (OpenTelemetry), testing, deployment readiness, and zero-trust defaults.
Crafting puzzles that teach through play, create "aha" moments, and challenge without frustratingUse when "puzzle, puzzle design, puzzle game, puzzle mechanics, difficulty curve, hint system, brain teaser, riddle, logic puzzle, escape room, teaching through play, aha moment, portal puzzle, baba is you, the witness, talos principle, professor layton, puzzles, game-design, level-design, difficulty, teaching, hints, brain-teaser, escape-room, logic, challenge" mentioned.
Autonomous polyglot monorepo bootstrap meta-prompt. TRIGGERS - new monorepo, polyglot setup, scaffold Python+Rust+Bun, monorepo from scratch.
R3F performance optimization—LOD (Level of Detail), frustum culling, instancing strategies, draw call reduction, frame budgets, lazy loading, and profiling tools. Use when optimizing render performance, handling large scenes, or debugging frame rate issues.