Browse 699 Specialized Subagents — Specialized Subagents & Slash Commands

Specialized agent for identifying, analyzing, and providing remediation guidance for code quality issues using CAST Imaging

Draft and format compelling LinkedIn posts with Unicode bold/italic styling, visual separators, and engagement-optimized structure. Transforms raw content, technical material, images, or ideas into copy-paste-ready LinkedIn posts.

Read-only utility agent for analyzing media files (PDFs, images, diagrams) attached to messages. (Multimodal Looker - Media Analysis)

Master TDD orchestrator specializing in red-green-refactor discipline, multi-agent workflow coordination, and comprehensive test-driven development practices. Enforces TDD best practices across teams with AI-assisted testing and modern frameworks. Use PROACTIVELY for TDD implementation and governance.

Practical work plan reviewer. Cruelly spots gaps, missing context, and unexecutable tasks in plans. (Momus - Plan Reviewer)

Generates, validates, and optimizes KQL queries for Microsoft Defender XDR Advanced Hunting across Endpoint, Identity, Office 365, Cloud Apps, and Identity.

Use when you need to mine error logs and agent output for recurring failure and cascade patterns, then document grounded recovery and cascade-prevention strategies (as Markdown specs) that other agents or humans can act on.

Agent definition domain

Read-only codebase search specialist. Answers "Where is X?" and locates specific implementation patterns. (Explore - Contextual Grep)

Use when the user wants to challenge assumptions, break down a complex problem from scratch, or approach something with first principles reasoning. Triggers on: 'first principles', 'challenge assumptions', 'why do we do it this way', 'rethink', 'from scratch', 'fundamental truths'.

Use when the user needs to identify and prioritize risky assumptions in a product idea, feature, or strategy. Triggers on: 'assumptions', 'what could go wrong', 'validate', 'riskiest assumption', 'de-risk', 'assumption map'.

Implement minimal code to satisfy GitHub issue requirements and make failing tests pass without over-engineering.

Restricted read-only loader dispatched by the Antigravity Security scan workflow to return one JSON file from the run directory; not for direct invocation.

Use this agent when you need an idea pressure-tested with brutal honesty, competitor teardown, market validation, and clear go/no-go guidance before building.

Expert startup business analyst specializing in market sizing, financial modeling, competitive analysis, and strategic planning for early-stage companies. Use PROACTIVELY when the user asks about market opportunity, TAM/SAM/SOM, financial projections, unit economics, competitive landscape, team planning, startup metrics, or business strategy for pre-seed through Series A startups.

Use this agent when you need to conduct authorized security penetration tests to identify real vulnerabilities through active exploitation and validation. Use penetration-tester for offensive security testing, vulnerability exploitation, and hands-on risk demonstration.

Expert Next.js 16 developer specializing in App Router, Server Components, Cache Components, Turbopack, and modern React patterns with TypeScript

Evaluation gatekeeper for fine-tuning — builds golden sets and graders, calibrates judges, baselines base models, and issues checkpoint promotion verdicts. Use when constructing an eval harness before training or gating a trained checkpoint. Deliberately independent from training execution.

Expert performance engineer specializing in modern observability, application optimization, and scalable system performance. Masters OpenTelemetry, distributed tracing, load testing, multi-tier caching, Core Web Vitals, and performance monitoring. Handles end-to-end optimization, real user monitoring, and scalability patterns. Use PROACTIVELY for performance optimization, observability, or scalability challenges.

Agent definition issue-tracker

Use this agent when you need expert analysis of type design in your codebase. Specifically use it (1) when introducing a new type to ensure it follows best practices for encapsulation and invariant expression, (2) during pull request creation to review all types being added, and (3) when refactoring existing types to improve their design quality. The agent will provide both qualitative feedback and quantitative ratings on encapsulation, invariant expression, usefulness, and enforcement

Holistic software architecture planner that evaluates tech stacks, designs scalability roadmaps, performs cloud-agnostic cost analysis, reviews existing codebases, and delivers interactive Mermaid diagrams with HTML preview and draw.io export

Build React components, implement responsive layouts, and handle client-side state management. Masters React 19, Next.js 15, and modern frontend architecture. Optimizes performance and ensures accessibility. Use PROACTIVELY when creating UI components or fixing frontend issues.

GitHub Copilot agent elasticsearch-observability