Builds CLI tools with argument parsing, interactive prompts, progress bars, spinners, and shell completion scripts using commander, click, typer, or cobra.

Designs cloud architectures, creates migration plans, generates cost optimization recommendations, and produces disaster recovery strategies across AWS, Azure, and GCP.

GitHub Actions workflow for automated pragmatic code review on pull requests, posting triage-leveled findings as PR comments

Analyzes code diffs and files to identify bugs, security vulnerabilities, code smells, and architectural concerns, then produces a structured review report with prioritized, actionable feedback.

Create sales-ready competitive battlecards comparing your product against a specific competitor — positioning, feature comparison, objection handling, and win/loss patterns

Analyze competitors with strengths, weaknesses, and differentiation opportunities. Identifies direct competitors and maps the competitive landscape

Evaluate decisions across three time horizons: 10 minutes, 10 months, 10 years. Reveals when short-term thinking hijacks decisions and helps overcome present bias.

Apply the Eisenhower matrix (urgent/important) to prioritize tasks or decisions. Categorizes items into four quadrants: do first, schedule, delegate, eliminate.

Break down to fundamentals and rebuild from base truths. Strips away assumptions, conventions, and analogies to identify irreducible truths, then rebuilds understanding.

Find the simplest explanation that fits all the facts. Enumerates assumptions, checks evidence, and selects the explanation with fewest unsupported assumptions.

Identify the single highest-leverage action. Finds the one domino that knocks down all others, reducing overwhelm to a single focus with a concrete next step.

Apply Pareto's principle (80/20 rule) to identify the vital few factors that drive the majority of results. Cuts through noise to focus on what actually matters.

Think through consequences of consequences. Traces causal chains beyond obvious first-order effects to reveal delayed costs, feedback loops, and unintended outcomes.

Map strengths, weaknesses, opportunities, and threats. Combines internal and external factor analysis with cross-quadrant strategic moves (SO, WO, ST, WT strategies).

Expert guidance for creating, writing, building, and refining Claude Code Skills. Covers SKILL.md authoring, router patterns, progressive disclosure, references, workflows, templates, and self-healing via heal-skill.

Create optimized prompts for Claude-to-Claude pipelines with research, planning, and execution stages. Builds structured outputs with dependency detection for chaining research, plan, and implement workflows.

Create a Product Requirements Document using a comprehensive 8-section template covering problem, objectives, segments, value propositions, solution, and release planning

Expert guidance for creating Claude Code slash commands. Covers YAML frontmatter, arguments, dynamic context loading, tool restrictions, and command patterns.

Expert guidance for creating Claude Code subagents and the Task tool. Covers agent configurations, system prompt writing, tool selection, model choice, orchestration patterns, and multi-agent workflows.

Optimizes database queries and improves performance across PostgreSQL and MySQL systems including index design, query rewrites, configuration tuning, and partitioning strategies.

Parses error messages, traces execution flow through stack traces, correlates log entries, and applies systematic hypothesis-driven methodology to isolate and resolve bugs.

Build a complete design system from scratch. Competitive research via web search and browse. SAFE/RISK breakdown of choices. Self-contained HTML preview page. Outputs DESIGN.md as project design source of truth.

Creates Dockerfiles, configures CI/CD pipelines, writes Kubernetes manifests, and generates Terraform/Pulumi infrastructure templates for deployment automation and GitOps.

Builds Django web applications and REST APIs with Django REST Framework, creates models with proper indexes, optimizes ORM queries, and configures JWT authentication.

Post-ship documentation sync. Updates README, ARCHITECTURE, CONTRIBUTING, CHANGELOG, TODOS, VERSION. Auto-applies factual corrections, asks for risky rewrites. CHANGELOG voice polish. Cross-doc consistency checks.

Builds .NET 8 applications with minimal APIs, clean architecture, cloud-native microservices, Entity Framework Core, CQRS with MediatR, and AOT compilation.

Draft a detailed Non-Disclosure Agreement between two parties covering information types, jurisdiction, and clauses needing legal review

Generate realistic dummy datasets for testing with customizable columns, constraints, and output formats (CSV, JSON, SQL, Python script)

Develops firmware for microcontrollers, implements RTOS applications, optimizes power consumption for STM32, ESP32, FreeRTOS, and bare-metal systems.

Builds high-performance async Python APIs with FastAPI and Pydantic V2 including REST endpoints, authentication flows, async SQLAlchemy, and WebSocket endpoints.

Conducts structured requirements workshops to produce feature specifications, user stories, EARS-format functional requirements, acceptance criteria, and implementation checklists.

Fine-tunes LLMs and trains custom models using LoRA/QLoRA adapters, JSONL training datasets, hyperparameter configuration, RLHF, DPO, and model quantization.

Use when implementation is complete, all tests pass, and you need to decide how to integrate the work — guides completion of development work by presenting structured options for merge, PR, or cleanup

Scan Android APKs for Firebase security misconfigurations including open databases, storage buckets, authentication issues, and exposed cloud functions. For authorized security research only.

Builds cross-platform applications with Flutter 3+ and Dart including widget development, Riverpod/Bloc state management, GoRouter navigation, and platform-specific implementations.

Restricts file edits to a specified directory. Pre-tool hooks intercept Edit and Write operations. Trailing-slash matching prevents partial path collisions.

Full-stack frontend development combining premium UI design, cinematic animations, AI-generated media assets, persuasive copywriting, and generative art

Full-stack backend architecture and frontend-backend integration with REST APIs, auth flows, real-time features, and database integration

Builds security-focused full-stack web applications with integrated frontend and backend components implementing layered security including auth, validation, encoding, and parameterized queries.

Builds game systems with Unity/Unreal Engine, implements ECS architecture, configures physics and multiplayer networking, optimizes frame rates, and develops shaders.

Implements concurrent Go patterns using goroutines and channels, designs microservices with gRPC or REST, optimizes performance with pprof, and enforces idiomatic Go.

Designs GraphQL schemas, implements Apollo Federation, builds real-time subscriptions, and optimizes queries with DataLoader and federation directives.

Identify growth loops (flywheels) for sustainable traction. Evaluates 5 loop types: Viral, Usage, Collaboration, User-Generated, and Referral

Self-update mechanism. Detects git vs vendored install. Auto-upgrade option with escalating snooze backoff. Syncs global and local copies. Extracts CHANGELOG bullets post-upgrade.

Identify risky assumptions for a feature idea in an existing product across Value, Usability, Viability, and Feasibility. Uses multi-perspective devil's advocate thinking

Detects insecure default configurations including hardcoded credentials, fallback secrets, weak authentication defaults, and dangerous values in production

Builds enterprise Java applications with Spring Boot 3.x, microservices, reactive programming, WebFlux, JPA optimization, and Spring Security with OAuth2/JWT.

Create job stories using the 'When [situation], I want to [motivation], so I can [outcome]' format with detailed acceptance criteria

Provides idiomatic Kotlin patterns including coroutine concurrency, Flow streams, multiplatform architecture, Compose UI, Ktor servers, and type-safe DSL design.

Deploys and manages Kubernetes workloads with deployment manifests, pod security policies, RBAC, Helm charts, NetworkPolicies, and multi-cluster management.

Builds Laravel 10+ applications with Eloquent models, Sanctum authentication, Horizon queues, RESTful APIs with API resources, and Livewire reactive interfaces.

Designs incremental migration strategies using strangler fig pattern, identifies service boundaries, produces dependency maps, and generates API facade designs for aging codebases.

Domain expertise for macOS app development. Exhaustive knowledge base covering SwiftUI patterns, AppKit integration, document and shoebox app architectures, menu bar apps, system APIs, code signing, and CLI workflows.

Designs distributed system architectures, decomposes monoliths into bounded-context services, recommends communication patterns, and produces resilience strategies.

Designs production-grade ML pipeline infrastructure with experiment tracking, Kubeflow/Airflow DAGs, feature store schemas, model registries, and automated retraining workflows.

Configures monitoring systems, implements structured logging, creates Prometheus/Grafana dashboards, defines alerting rules, instruments distributed tracing, and performs load testing.

Domain expertise for n8n workflow automation. Covers workflow architecture, node catalog, expressions, AI and HTTP nodes, code nodes, testing, performance optimization, and deployment.

Creates NestJS modules, controllers, services, DTOs, guards, and interceptors for enterprise-grade TypeScript backend applications with dependency injection.

Build an Opportunity Solution Tree (OST) to structure product discovery — map a desired outcome to opportunities, solutions, and experiments. Based on Teresa Torres' Continuous Discovery Habits

Transform an output-focused roadmap into an outcome-focused one that communicates strategic intent. Rewrites initiatives as outcome statements reflecting user and business impacts

Performs pandas DataFrame operations for data analysis, manipulation, transformation, time series analysis, merging, aggregation, and performance optimization.

Builds PHP applications with modern PHP 8.3+ features, Laravel or Symfony frameworks, strict typing, PHPStan, async patterns with Swoole, and PSR standards.

Eng manager-mode plan review. Scope challenge, architecture review, code quality review, detailed test coverage diagram, performance review. Produces test plan artifact for downstream QA. Optional cross-model outside voice.

Writes E2E tests with Playwright including test scripts, page objects, test fixtures, reporters, CI integration, API mocking, and visual regression testing.

Perform Porter's Five Forces analysis — competitive rivalry, supplier power, buyer power, threat of substitutes, and threat of new entrants

Brainstorm product positioning ideas differentiated from competitors. Identifies top competitors and generates positioning statements with rationale

Optimizes PostgreSQL queries, configures replication, implements advanced features including EXPLAIN analysis, JSONB operations, extension usage, and VACUUM tuning.

Analyze and design pricing strategies including pricing models, competitive pricing analysis, willingness-to-pay estimation, and price elasticity

Reference guide to 9 prioritization frameworks with formulas, when-to-use guidance, and templates — RICE, ICE, Kano, MoSCoW, Opportunity Score, and more

Draft a detailed privacy policy covering data types, jurisdiction, GDPR and compliance considerations, and clauses needing legal review

Create a comprehensive product strategy using the 9-section Product Strategy Canvas — vision, segments, costs, value propositions, trade-offs, metrics, growth, capabilities, and defensibility

Builds Python 3.11+ applications with type safety, async programming, robust error handling, mypy strict mode, pytest suites, and code validation with black and ruff.

Report-only QA — same browser-based testing as qa but documents bugs with screenshots and repro steps only, no code changes. Health score formula weighted across 8 categories. Outputs to .gstack/qa-reports/.

Designs production-grade RAG systems with document chunking, embedding generation, vector store configuration, hybrid search pipelines, reranking, and retrieval quality evaluation.

Optimizes Active Record queries, implements Turbo Frames and Streams, configures Action Cable WebSockets, sets up Sidekiq workers, and writes RSpec test suites for Rails 7+.

Builds cross-platform mobile applications with React Native and Expo including navigation, native modules, FlatList optimization, and platform-specific code.

Generate user-facing release notes from tickets, PRDs, or changelogs. Creates clear, engaging summaries organized by category (new features, improvements, fixes)

Research competitors -- who else does this, how they do it, strengths and weaknesses. Uses structured intake with clarifying questions and decision gates before execution.

Exhaustive deep-dive analysis of a single topic. Comprehensive research with intake gates, structured output, evidence quality ratings, and actionable recommendations.

Research the history of a topic -- how it evolved, key milestones, and what patterns emerge over time. Provides chronological analysis with lessons learned.

Find and evaluate open-source solutions, libraries, and tools. Compares options on activity, documentation, community, license, and fitness for purpose.

Deep technical analysis of architectures, APIs, or implementations. Evaluates technical approaches, tradeoffs, and produces actionable technical recommendations.

Comprehensive PM resume review and tailoring against 10 best practices including XYZ+S formula, keyword optimization, job-specific tailoring, and structure

Writes idiomatic Rust code with memory safety, zero-cost abstractions, ownership patterns, lifetime management, trait hierarchies, and async applications with tokio.

Writes Apex code, builds Lightning Web Components, optimizes SOQL queries, implements triggers, batch jobs, platform events, and Salesforce DX CI/CD pipelines.

Implements authentication/authorization, secures user input, and prevents OWASP Top 10 vulnerabilities with bcrypt/argon2, parameterized queries, CORS/CSP, and JWT tokens.

Identifies security vulnerabilities, generates structured audit reports with severity ratings, and provides actionable remediation guidance for SAST, DevSecOps, and compliance.

Import cookies from your real browser (Comet, Chrome, Arc, Brave, Edge) into the headless browse session for testing authenticated pages. Interactive picker UI or direct domain import. macOS Keychain integration.

Comprehensive GLSL shader techniques for stunning visual effects — ray marching, SDF modeling, fluid simulation, procedural generation, and more

Builds Shopify themes, develops custom apps with OAuth and webhooks, implements Storefront API integrations, and creates checkout UI extensions and Shopify Functions.

Writes Spark jobs, debugs performance issues, configures cluster settings for distributed data processing, DataFrame transformations, and structured streaming analytics.

Reverse-engineers specifications from existing codebases, maps code dependencies, generates API documentation from source, and identifies undocumented business logic.

Generates Spring Boot 3.x configurations, creates REST controllers, implements Spring Security 6, sets up Spring Data JPA, and configures reactive WebFlux endpoints.

Optimizes SQL queries, designs database schemas, troubleshoots performance with window functions, CTEs, indexing strategies, and query plan analysis across database dialects.

Defines service level objectives, creates error budget policies, designs incident response procedures, develops capacity models, and produces monitoring configurations.

Build a stakeholder map using a power/interest grid, identify communication strategies per quadrant, and generate a communication plan