# marktco > Open-source publisher. Listings imported from github.com/marktco — credited to the original author with their license. - **Listings:** 17 - **Total installs:** 0 - **Profile:** https://agentstack.voostack.com/s/marktco - **Website:** https://github.com/marktco ## Published listings - [Test Design Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-testing) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-testing` A Socratic coach for test design that helps you think through what to test, edge cases, and test structure without writing tests for you. - [Estimation Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-estimation) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-estimation` A Socratic coach for task estimation that helps you break down work, identify unknowns, and give realistic estimates without doing the analysis for you. - [Typescript Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-typescript) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-typescript` A Socratic coach for TypeScript that helps you reason through type design, generics, and type narrowing without writing types for you. - [Documentation Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-documentation) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-documentation` A Socratic coach for writing documentation that helps you create clear, useful docs by asking about your audience and their needs. - [Performance Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-performance) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-performance` A Socratic coach for performance optimization that helps you identify bottlenecks through measurement and hypothesis, not guesswork. - [Debugging Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-debugging) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-debugging` A Socratic coach for debugging that helps you systematically isolate bugs by asking about symptoms, hypotheses, and what you've ruled out. - [Algorithm Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-algorithms) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-algorithms` A Socratic coach for algorithmic problem-solving that helps you work through problems systematically without solving them for you. - [Code Review Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-code-review) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-code-review` A Socratic coach for giving code review feedback that helps you communicate clearly, constructively, and actionably. - [Socratic Coding Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-coding) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-coding` A Socratic coding coach that helps you grow as a developer by guiding you to solutions rather than giving them to you. It follows the workflow of requirements gathering, testing, and implementation: outline → tests → code until green. - [Api Design Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-api-design) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-api-design` A Socratic coach for API design that helps you reason through endpoints, resources, versioning, and error handling without designing the API for you. - [Reading Code Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-reading-code) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-reading-code` A Socratic coach for understanding unfamiliar codebases that helps you navigate, form mental models, and trace execution without someone explaining it all to you. - [Problem Decomposition Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-problem-decomposition) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-problem-decomposition` A Socratic coach for breaking down complex problems into manageable pieces without doing the decomposition for you. - [React Composition Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-react) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-react` A Socratic coach for React component design that helps you reason through composition patterns, state placement, and prop flow without writing components for you. - [System Design Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-system-design) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-system-design` A Socratic coach for system design that helps you reason through architecture decisions, trade-offs, and scalability without handing you diagrams or solutions. - [Git Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-git) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-git` A Socratic coach for Git workflow that helps you think through branching, commit hygiene, and history management without giving you commands to run. - [Data Modeling Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-databases) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-databases` A Socratic coach for database design that helps you think through schema design, normalization, and query patterns without writing SQL for you. - [Refactoring Coach](https://agentstack.voostack.com/l/skill-marktco-agentic-de-atrophy-refactoring) — Skill · Free · security-reviewed — `agentstack add skill-marktco-agentic-de-atrophy-refactoring` A Socratic coach for refactoring that helps you identify code smells and reason through improvements without rewriting your code for you. --- Seller on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Install any with `agentstack add `.