Claude Code Subagents · page 9

Creates frontend ADR and Design Docs to evaluate React technical choices. Use when frontend PRD is complete and technical design is needed, or when "frontend design/React design/UI design/component design" is mentioned.

Creates ADR and Design Docs to evaluate technical choices and implementation approaches. Use when PRD is complete and technical design is needed, or when "ADR/design doc/technical design/architecture" is mentioned.

Gathers UI-related facts by reading the project's external-resources file, fetching external sources (design origin, design system, guidelines) via MCP or URL, and analyzing the existing UI codebase. Use when frontend design or adjustment work needs a single consolidated UI context (external sources + code) before document creation or implementation.

Creates UI Specifications from PRD and optional prototype code. Use when PRD is complete and frontend UI design is needed, or when "UI spec/screen design/component decomposition/UI specification" is mentioned.

Critically evaluates investigation results, checks path coverage, and validates failure points using Devil's Advocate method. Use when investigation has completed, or when "verify/validate/double-check/confirm findings" is mentioned. Focuses on verification and conclusion derivation.

Creates work plan documents with trackable execution plans. Use when Design Doc is complete and implementation planning is needed, or when "work plan/implementation plan/task planning" is mentioned.

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Analyzes skill effectiveness data to identify failure patterns and recommend improvements. Use after /skill-monitor flags underperforming skills.

Use this agent when a user reports a concrete bug ("X doesn't work", "crashes on Y", "wrong output for Z", a GitHub issue with steps-to-reproduce). The agent reproduces the bug, locates the root cause, applies a minimal fix, proves the fix works with a regression test, and confirms nothing else broke. Do NOT use for feature requests, refactors, or open-ended "look at this code" asks — those are different profiles.

Use this agent when the user asks an open-ended question about how the ast-index codebase works ("how is incremental update wired", "why don't we tree-sitter Perl", "what's the data flow for --format json", "which commands share scope filtering"). The agent reads the code, traces connections, and returns a structured answer with file:line citations. It does NOT edit code, does NOT run destructive commands, and does NOT speculate — every claim is grounded in a file you can open.

Use this agent to review a set of changes before they ship — staged/unstaged diff, a specific commit range, a PR description, or "the latest commit". The agent reads the diff against project rules in CLAUDE.md and .claude/rules/*, runs the build and test suite, and reports what's good, what's wrong, and what's missing. It does NOT fix anything itself — the point is feedback, not rework.

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Plays agent-specific sounds for the 6 hooks that actually fire in agent sessions

Tests all 30 Claude Code hooks by logging each event to tests-agents-hook/agent-hook-fired.log

Expert code generation specialist for creating high-quality, production-ready analysis code in multiple programming languages. Use proactively for any code generation task requiring clean, efficient, and maintainable code for data analysis, machine learning, and visualization.

Advanced data exploration and analysis specialist for statistical analysis, pattern discovery, machine learning insights, and actionable business intelligence. Use proactively for any data analysis task requiring deep insights and comprehensive understanding.

Research hypothesis generation specialist for creating testable hypotheses, experimental designs, and research methodologies. Use proactively when data analysis suggests deeper investigation or when planning new research initiatives.

Data quality and validation specialist ensuring data integrity, analysis accuracy, and result reliability. Use proactively for any data validation, quality checks, or result verification tasks.

Expert report writer specializing in comprehensive data analysis documentation, executive summaries, and technical documentation. Use proactively to create polished, professional reports.

Expert data visualization specialist for creating interactive, insightful, and publication-quality visualizations with advanced analytics integration and storytelling capabilities. Use proactively when data analysis would benefit from visual representation or when communicating complex insights to stakeholders.

Ansible automation: playbooks, roles, collections, Molecule testing, Vault security.

Zero-dependency combat visual upgrades: CSS particle replacement, Framer Motion combat juice, CSS 3D card transforms.

Data pipelines, ETL/ELT, warehouse design, dimensional modeling, stream processing.

Database design, optimization, query performance, migrations, indexing strategies.

Extract coding conventions and style rules from GitHub user profiles via API.

Compact Go development for tight context budgets. Modern Go 1.26+ patterns.

Go development: features, debugging, code review, performance. Modern Go 1.26+ patterns.

Python hook development for Claude Code event-driven system and learning database.

Kotlin development: features, coroutines, debugging, code quality, multiplatform.

Kubernetes and Helm: deployments, troubleshooting, cloud-native infrastructure.

MCP server development for local documentation access in TypeScript/Node.js and Go.

Use this agent when building a NextJS e-commerce site: shopping cart, Stripe payments, product catalogs, order management, and checkout flows

Use this agent when you need expert assistance with NodeJS backend API development: REST endpoints, authentication, file uploads, webhooks, middleware, and database integration

OpenSearch/Elasticsearch: cluster management, performance tuning, index optimization.

Web performance optimization: Core Web Vitals, rendering, bundle analysis, monitoring.

Perses observability platform: dashboards, plugins, operator, core development.

PHP development: features, debugging, code quality, security, modern PHP 8.x patterns.

Pipeline orchestration: scaffold multi-component workflows, fan-out/fan-in patterns.

PixiJS v8 2D WebGL combat rendering: @pixi/react hybrid canvas, normal maps, GPU particles, post-processing.

Multi-agent project coordination: task breakdown, dependency management, progress tracking.

Prometheus and Grafana: monitoring, alerting, dashboard design, PromQL optimization.

Python development: features, debugging, code review, performance. Modern Python 3.12+ patterns.

OpenStack Python development: Nova, Neutron, Cinder, Oslo libraries, WSGI middleware.

RabbitMQ: message queue architecture, clustering, high-availability, routing patterns.

React Native and Expo development: performance, animations, navigation, native UI patterns.

React portfolio/gallery sites for creatives: React 18+, Next.js App Router, image optimization.

Research coordination: systematic investigation, multi-source analysis, synthesis.

Research subagent execution: OODA-loop investigation, intelligence gathering, source evaluation.

Code quality review: conventions, naming, dead code, performance, test coverage

Domain-specific review: ADR compliance, business logic, SAP CC structural, pragmatic builder.

Multi-perspective review: newcomer, senior, pedant, contrarian, user advocate, meta-process.

System-level review: security, concurrency, error handling, observability, API contracts

Rive skeletal animation: @rive-app/react-canvas, state machines, character pipelines, combat integration.

SQLite with Peewee ORM: model definition, query optimization, migrations, transactions.

Swift development: iOS, macOS, server-side Swift, SwiftUI, concurrency, testing.

Systematic toolkit upgrades: adapt agents, skills, hooks when Claude Code ships updates.

Technical documentation: API docs, system architecture, runbooks, enterprise standards

Technical journalism: explainers, opinion pieces, analysis articles, long-form content.

Testing automation: Vitest, Playwright, E2E, coverage enforcement, CI/CD integration

Toolkit governance: edit skills, update routing tables, manage ADR lifecycle, enforce standards.

TypeScript debugging: race conditions, async/await issues, type errors, runtime exceptions.