Mobile development specialist. Implements best practices for React Native/Flutter/SwiftUI/Jetpack Compose, navigation, offline support, and store review preparation. Use when mobile app development is needed.

Browser automation agent using Playwright and Chrome DevTools to complete tasks. Automates data collection, form interaction, screenshot capture, and network monitoring. Task completion focus (vs Voyager for E2E testing). Use when browser automation is needed.

LLM-optimized folder structure design. Audits and restructures project directories for context efficiency, progressive disclosure, and prompt cache performance. Use when agents can't find files, context costs are high, or CLAUDE.md hierarchy needs organization. Don't use for general repo structure (Grove), config audit (Hone), or skill generation (Sigil).

Meta-orchestrator that coordinates specialist AI agent teams. Decomposes requests into minimum viable agent chains, spawns each agent as an independent session via Agent tool in AUTORUN modes, and drives to final output automatically. Use when multi-agent coordination is needed.

AI/ML design and evaluation specialist covering prompt engineering, RAG design, LLM application patterns, AI safety, evaluation frameworks, MLOps, and cost optimization.

Autonomous loop runner for nexus-autoloop. Generates script sets from goals, designs operation contracts, audits live loops, and recovers state — delivering end-to-end runners that complete reliably.

Usability improvement, interaction quality enhancement, cognitive load reduction, feedback design, and a11y compliance. Use when improving UX usability or interaction feel.

Deep GitHub Actions workflow expert. Covers trigger strategy, security hardening, performance optimization, PR automation, and Reusable Workflow design. Use when new GHA workflow design or advanced optimization is needed.

Faithful reproduction agent that generates pixel-accurate HTML/CSS code from image mockups (PNG/JPG/screenshots) and performs visual verification. Use when mockup-to-code generation is needed.

Internationalization (i18n) and localization (l10n) specialist. Hardcoded string extraction to t() functions, Intl API integration for date/currency/number formatting, translation key structure management, and RTL layout support. Use when multi-language support or i18n setup is needed.

OWASP ZAP/Burp Suite/Nuclei integration, penetration test planning, DAST execution, and vulnerability scanning. Use when dynamic security testing, penetration testing, or runtime vulnerability validation is needed. Complements Sentinel static analysis.

UX writing specialist for user-facing text. Handles microcopy, error messages, voice and tone design, onboarding copy, and accessibility text. Use when UX writing or content strategy is needed.

KPI definition, tracking event design, and dashboard specification. North Star Metric, funnel analysis, and cohort analysis design. GA4/Amplitude/Mixpanel/PostHog integration. Use when metrics foundation is needed.

Game planning and production agent. GDD structuring, game balance math, narrative design, economy design, systems design, player psychology, and production management. Does not write code.

Add JSDoc/TSDoc, update READMEs, replace any types with proper definitions, and add high-value comments to complex logic. Use when documentation gaps, unclear intent, or type safety improvements are needed.

Edge-case test addition, flaky test repair, and coverage improvement. Use when test gaps need filling, reliability needs raising, or regression tests need adding. Multi-language support (JS/TS, Python, Go, Rust, Java).

Multi-session parallel orchestrator using Claude Code Agent Teams API and Codex CLI Subagents to launch, manage, and coordinate concurrent task execution across multiple instances. Use when parallel work is needed.

Priority quantification agent. Scores and orders competing items using ICE/RICE/WSJF/MoSCoW/Cost of Delay/Kano frameworks. Does not write code.

Terminal recording and CLI demo video generation. Declarative CLI demo GIF/video creation using VHS, terminalizer, and asciinema. Use when terminal session recording, CLI demos, or README GIF generation is needed.

Git history investigation, regression root cause analysis, and code archaeology specialist. Time-travels through commit history to uncover truth. Use when git history investigation or regression analysis is needed.

Pre-change impact analysis agent. Evaluates change risk across vertical (dependency chains, affected files) and horizontal (pattern consistency, naming conventions) dimensions. Does not write code. Use when change planning or blast radius assessment is needed.

Narrative design agent that tells product and feature use cases as customer-centric stories. Use when customer experience storytelling, scenario stories, or product narratives are needed.

Database schema design, migration planning, and ER diagram specialist. Handles normalization, index strategies, and relation definitions. Use when DB schema design is needed.

Bug investigation, root cause analysis (RCA), reproduction steps, and impact assessment. Investigation-only agent that identifies why bugs occur and where to fix them without writing code.

Search engine and vector DB design specialist. Use when full-text search, vector search, or hybrid search design, index optimization, or RAG retrieval layer implementation is needed.

Static security analysis agent. Handles hardcoded secret detection, SQL injection prevention, input validation, security header configuration, and dependency CVE scanning. Use when security auditing or vulnerability fixing is needed. Don't use for runtime exploit verification (Probe), general code review (Judge), CI/CD pipeline management (Gear), or detection rule authoring (Vigil).

Multi-tenant architecture design. Tenant isolation strategies, RLS, routing, and scale design for SaaS.

Workflow guide that decomposes complex tasks (Epics) into Atomic Steps under 15 minutes each. Manages progress tracking, drift prevention, risk assessment, and timely commit proposals. Use when complex task decomposition is needed.

Storybook story creation, catalog management, and Visual Regression integration. Handles UI component documentation, visual testing, and CSF 3.0/Factories format story creation. Supports Storybook 10 (ESM-only) and React Cosmos. Use when component documentation or visual testing is needed.

Load testing, contract testing, chaos engineering, mutation testing, and resilience verification specialist. Use when system limit verification, non-functional testing, or reliability validation is needed.

Meta-tooling agent that analyzes project codebases, tech stacks, and conventions to dynamically generate Claude Code skills optimized for that project. Places skills in both .claude/skills/ and .agents/skills/ to boost dev efficiency.

AI image generation code creation using Gemini API. Handles text-to-image generation, image editing, and prompt optimization. Use when image generation code is needed.

Crawl and scraping systems architecture — distributed crawler topology, URL frontier management, politeness policy, and compliance architecture. Architecture-only (no execution code). Use when crawl system architecture is needed. Don't use for single-page scraping (Navigator) or ETL pipelines (Stream).

Detects unnecessary files, identifies unused code, finds orphaned files, and proposes safe deletion. Use when repository cleanup, dead code removal, or project tidying is needed. Don't use for code removal execution (Builder), deletion review (Judge), repo structure (Grove), or scope cutting (Void).

Scheduling and time-aware logic architect for cron, timezone/DST, retry/backoff, and business-calendar design. Use when schedule design is needed.

Converts repository changes into detailed learning documents. Use when turning diffs into teaching materials, recording design decisions, or creating onboarding materials for new members.

Session replay analysis, persona-based behavioral pattern extraction, and UX issue storytelling. A behavioral archaeologist who reads the 'why' from actual user operation logs. Collaborates with Researcher/Echo for persona validation.

Incident first response, impact scope identification, recovery procedure formulation, and postmortem creation. Use when incident response or disaster recovery is needed. Does not write code (delegates fixes to Builder).

EXPLAIN ANALYZE analysis, query execution plan optimization, index recommendations, and slow query detection/fixing. Use when DB performance improvement or query optimization is needed. Complements Schema's schema design. Don't use for schema design/migrations (Schema), application code rewrites (Builder), non-DB performance (Bolt), or unknown root cause investigation (Scout).

Detection Engineering agent. Designs Sigma/YARA rules, maps detection coverage, designs threat hunting hypotheses, executes Purple Team Blue side, and integrates Detection-as-Code CI/CD. Use when defensive security verification is needed.

User feedback collection, NPS survey design, review analysis, sentiment analysis, feedback classification, and insight extraction reports. Use when establishing feedback loops.

YAGNI verification, scope cutting, pruning, and complexity reduction proposals. A 'subtraction' agent that questions the justification for every code, feature, process, document, design, spec, dependency, and config. Does not write code.

E2E testing specialist. Handles Playwright/Cypress/WebdriverIO configuration, Page Object design, auth flows, parallel execution, visual regression, a11y testing, and CI integration. Validates entire user journeys. Use when E2E test creation is needed.

Guardian of V.A.I.R.E. quality standards (Value/Agency/Identity/Resilience/Echo). Handles pre-release evaluation, scorecard assessment, and pass/fail determination. Use when UX quality gates are needed. Does not write code.

Workflow and state machine design agent. Use when state transition design, invalid transition detection, Saga patterns, or approval flow design is needed.

Variable name improvement, function extraction, magic number constants, dead code removal, and code review. Use when code is hard to read, refactoring is needed, or PR review is required. Does not change behavior. Don't use for bug/security detection (Judge), new tests/coverage (Radar), architecture analysis (Atlas), or feature implementation (Builder).

Tech blog/article series authoring for note/Zenn/Qiita/dev.to. Not for specs (Scribe) or microcopy (Prose).

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