Designs and authors Claude Code sub-agents (.claude/agents/*.md files) that integrate with an existing skill-stack. Use when: subagent, sub-agent, agent design, .claude/agents, custom agent, agent frontmatter, verifier agent, planner agent, agent description, agent delegation, Explore, Plan, general-purpose, Agent tool, agent permissions, agent tools field, agent skills preload, agent memory field, isolation worktree, permissionMode, agent decomposition, multi-agent decision, planner SPEC, verifier checklist, agent context isolation, tool-restricted agent, нужен ли мне агент, как сделать сабагента, как настроить .claude/agents. SKIP: building skills (→skill-evaluation), evaluating LLM agents in production (→agent-evaluation), Claude API / Messages SDK outside Claude Code (→claude-api), MCP server authoring (→mcp-server-author), agent-team coordination across separate sessions (→agent-teams), codex-specific agent authoring (use codex own conventions).
Tests and benchmarks LLM agents covering behavioral testing, capability assessment, reliability metrics, and production monitoring. Use when evaluating agent quality, designing eval suites, building regression tests, or measuring real-world reliability beyond benchmark scores.
System architecture discipline from Newman + Khononov + Richards/Ford. Use when: project-architect designs a new system, decomposes a monolith, chooses architecture style, writes ADRs, defines service boundaries. Trigger terms: bounded context, subdomain, architecture quantum, ADR, fitness function, saga, strangler fig. SKIP: single-file refactor, tactical UI design.
Build modern websites with Astro 6.x — Islands Architecture, zero-JS defaults, Server Islands, Actions, Content Layer, View Transitions. Use for static sites, content-heavy sites, marketing pages, blogs, documentation, e-commerce fronts. Trigger terms: astro, astro.build, .astro file, Islands Architecture, content collections, View Transitions, Server Islands, Astro Actions, astro:db, hybrid SSR/SSG.
Better Auth — framework-agnostic TypeScript authentication. Email/password, OAuth/social login, sessions, JWT, 2FA, magic link, email OTP, organizations/teams, RBAC, passkeys. Use when: better-auth, betterAuth, authClient, auth.api, createAuthClient, signUp.email, signIn.email, signIn.social, signIn.magicLink, getSession, useSession, twoFactor, magicLink, emailOTP, organization plugin, trustedOrigins, baseURL, BETTER_AUTH_SECRET, NextAuth alternative, Auth.js migration, Prisma/Drizzle/Kysely auth adapter, cookie sessions, OAuth callback, social provider, sign-in, login, OAuth flow, JWT issuance. SKIP: Auth0/Clerk/Supabase Auth platforms, Lucia (sunset), Passport.js (legacy Express middleware), NextAuth/Auth.js usage (different lib).
Biome 2 — Rust-based lint + format for JS/TS/JSON/CSS. Use when: biome, biome.json, biome.jsonc, biome check, biome format, biome lint, biome ci, ESLint replacement, Prettier replacement, fast formatter, single-file-config, organize imports, recommended rules, suppression comments, VS Code Biome extension, pre-commit hook. SKIP: ESLint-specific flat config (→eslint), Prettier-only formatting questions, dprint.
Requirements gathering before any creative work. Use BEFORE starting a feature/component/fix — explores user intent, scope, success criteria via 1-3 targeted questions, NOT free-form discussion. Replaces superpowers:brainstorming. Use when: новая фича, новая идея, brainstorm, поговорим про X, давай придумаем.
BullMQ 5 — Redis-backed Node.js queue. Jobs, workers, flows, repeating, rate-limit, sandboxed processors, observability. Use when: bullmq, bull mq, taskforcesh, Queue, Worker, QueueEvents, FlowProducer, JobScheduler, repeatable job, cron, delay, backoff, priority, lifo, attempts, removeOnComplete, sandboxed processor, useWorkerThreads, sequentialize, rate limiter, parent-child, child jobs, dependencies, bull-board, bullmq-pro, getJobCounts, drain, obliterate, QueueScheduler (removed), graceful shutdown. SKIP: legacy Bull (→bull-legacy cascade), Agenda, Inngest / Trigger.dev (managed SaaS), Celery (Python), Sidekiq (Ruby).