Skill Claude CodeCodex
Use when creating a new custom agent/subagent definition (.claude/agents/.md), auditing or rewriting existing agent definitions, deciding whether a task deserves a dedicated agent vs general-purpose with a good prompt, choosing an agent's tools whitelist or model tier, or when delegated agents keep going off-scope…
Skill Claude CodeCodex
Use when writing, refactoring, or debugging Android app code (Kotlin, Jetpack Compose, Gradle, ProGuard/R8) — before adding a feature, touching build config or proguard-rules, preparing a release/AAB, or when facing release-only crashes, ClassNotFoundException after minify, lifecycle leaks, ANR, or excessive…
Skill Claude CodeCodex
Use when designing, changing, or debugging backend server code (REST, Node.js/TypeScript, Go), especially endpoints, response envelopes, pagination, migrations, queries, auth, password hashing, secrets, or deploys; also for N+1 queries, races, IDOR, SSRF/injection, goroutine leaks, unhandled rejections, event-loop…
Skill Claude CodeCodex
Use when about to spawn or delegate work to a subagent (Agent/Task tool), choosing a model tier (haiku/sonnet/opus/fable) for a task, writing a delegation prompt, deciding whether something should be delegated at all, deciding whether to dispatch multiple subagents in parallel, verifying a delegated result, or after a…
Skill Claude CodeCodex
Use when a feature or refactor changes public contracts, schemas, shared integration points, cross-layer data flow, release behavior, or other high-risk architecture decisions.
Skill Claude CodeCodex
Use when writing, refactoring, or debugging Flutter/Dart app code (widgets, Riverpod, Bloc, setState, platform channel, pubspec) — before adding a screen, choosing state management, measuring performance, adding a plugin, or preparing a release build. Also when facing jank/dropped frames, rebuild storms, release mode…
Skill Claude CodeCodex
Use when writing, refactoring, or debugging React/Next.js frontend code (App Router, Server/Client Components, hooks, Tailwind/CSS Modules) — before adding a component, choosing where state lives, wiring data fetching, or preparing a production deploy; or when facing hydration mismatch, NEXTPUBLIC env leaks, excessive…
Skill Claude CodeCodex
Use when designing or debugging high-concurrency Go services, especially worker pools, backpressure, bounded channels, errgroup/WaitGroup, rate limits, load shedding, circuit breakers, GOMAXPROCS, or connection pools; also for load-time OOM, rising goroutines, lock contention, p99 spikes, retry storms, pprof…
Agent
Use this agent to perform a thorough, line-level code review of recently written or changed code. This is the FIRST half of the two-agent cross-validation review workflow (paired with system-architect). It focuses on correctness, bugs, security (OWASP Top 10), style/convention adherence, and maintainability at the…
Agent
Use this agent for data collection, research, and fact verification tasks. It gathers information from the web and other sources, cross-checks claims against multiple independent sources, cites everything, and clearly separates verified facts from unverified ones. Use it when you need to research a topic, validate a…
Agent
Use this agent to debug a specific failing behavior — a bug, crash, error message, wrong output, or unexpected runtime behavior — where the goal is root cause + a verified fix. Distinct from fullstack-code-generator (which builds new features) and test-automation-expert (which writes tests). Examples:\n\n \nContext: A…
Agent
The single implementation agent — use it to write or refactor production code on any layer and stack (Flutter/Dart, frontend web React/Next, backend Node/Go, database, infra). Absorbs former Flutter-specific coding; distinct from debug-expert (fixes a specific bug) and test-automation-expert (writes tests).…
Agent
Use this agent for design-level judgment on a codebase, in two modes. MODE 1 — the SECOND half of the two-agent cross-validation code review workflow (paired with code-reviewer): evaluates a change's architecture soundness, design patterns, coupling/cohesion, scalability, data flow, API/contract design. MODE 2 …
Agent
Use this agent to create, review, or optimize tests — unit, integration, e2e, and CI/CD test strategy — across any stack. Distinct from fullstack-code-generator (writes product code) and debug-expert (fixes a specific bug); this agent writes tests and does not touch product code. Examples:\n\n \nContext: New code…
Agent
Use this agent to actually implement or modify UI — build a screen/component, adjust layout, styling, spacing, responsive behavior, or UI copy. This is the hands-on builder; analysis and recommendations are handled by ux-improvement-advisor (they interlock: advice → advisor, doing → this agent). Examples:\n\n…
Agent
Use this agent for read-only UX analysis and actionable improvement recommendations on interfaces, user flows, or interaction patterns — heuristic evaluation, usability/accessibility critique, flow friction. It advises but never edits; landing the changes is handled by ui-design-expert (they interlock: analysis → this…
Skill Claude CodeCodex
Use when writing a git commit message, Japanese UI copy or app strings (ボタン/エラーメッセージ等の文言), code review comments, or a completion report, especially when tone, formality, verbosity, or review phrasing is uncertain.
Skill Claude CodeCodex
Use when creating, regenerating, or auditing a repository-specific development harness, contract system, risk router, evidence gate, or project workflow policy.
Skill Claude CodeCodex
Use when writing, refactoring, or debugging iOS app code (Swift, SwiftUI, Swift Concurrency, Xcode) — before adding a feature, choosing state ownership (@State / @Observable / @Environment), touching MainActor/actor/Sendable, preparing a TestFlight/App Store build, or when facing App Store review rejection…
Skill Claude CodeCodex
Use when building or polishing mobile app UI visuals (Flutter, SwiftUI, Jetpack Compose) — before choosing spacing, typography, color, corner radius, elevation, or motion duration; when a screen "looks off", feels cluttered, cheap, or inconsistent; when reviewing touch targets, contrast ratio, Dynamic Type, text…
Skill Claude CodeCodex
Use when building or debugging RAG / semantic search / retrieval systems — before choosing a vector store (pgvector, Qdrant, Milvus, Elasticsearch), designing chunking, embedding models, hybrid search (BM25 + vector), HNSW indexing, or a reranker; or when facing bad recall, "retrieved the wrong docs", LLM answers…
Skill Claude CodeCodex
Use when working in a technical domain with no existing playbook, writing new coding guidelines / review criteria / checklists from scratch, judging whether a verification method actually proves a claim (test passed but does it count?), or when repeated fixes keep failing and the direction feels wrong. Domain-agnostic…