tstack

gstack is an open-source skill and tooling framework for Claude Code, developed by Garry Tan. It turns Claude Code into a virtual engineering team through Markdown-based slash commands and specialist roles covering product review, engineering management, design review, code review, browser-based QA, security auditing, release management, documentation, and other software-delivery tasks. Its tools can drive a real browser and support unit-test, end-to-end-test, and black-box verification loops. The repository describes 23 specialist tools and eight power tools, and distributes the project under the MIT license. It requires Claude Code, Git, and Bun; Node.js is additionally required on Windows.

Open Pstack is an unofficial, plugin-based workflow kit that brings Lauren Tan's pstack to Claude Code and Codex. It gives coding agents engineering rules, task-specific workflows, focused skills, and small local tools rather than providing a new model or hosted service. Its main poteto-mode workflow reads a task, selects an appropriate workflow, learns how the existing system works, compares designs when needed, favors small changes, and can use multiple models to challenge important decisions. It runs the code and checks behavior as a user would instead of stopping at passing tests, then can continue through review and continuous integration to prepare a pull request. Additional skills cover system explanation, architectural decisions, competing implementations, design interrogation, verification-skill creation and maintenance, pull-request supervision, and reflection. The repository supports installation as a Claude Code or Codex plugin and shares the same skill set between those applications. It is distributed under the MIT license and tracks the upstream pstack project while adapting its skills for Claude Code and Codex.

pstack-claude is an MIT-licensed port of Lauren Tan’s pstack agent workflow stack for Claude Code, Codex, Pi, OpenCode, Gemini CLI, and other agent harnesses. Its skills and routing instructions select workflows for tasks such as bug fixing, planning, feature work, refactoring, performance investigations, PR maintenance, and shipping; the bug-fixing workflow reproduces the failure, investigates how and why it occurs, delegates the fix, and reruns the failing case, involving an architect when the change crosses a function boundary. The package provides Claude Code and Codex plugins, a Pi extension, slash commands, subagent and question tools, wake-up tools, and setup for model defaults and reasoning effort. It runs scripts locally and has no server or telemetry; content read by its skills is sent to the configured model provider, and pull-request tools use the local GitHub CLI login.

Awesome Claude Skills is a curated GitHub resource covering reusable Claude Skills, plugins, tools, and related resources for Claude.ai, Claude Code, the Claude API, and other coding agents such as Codex, Cursor, Gemini CLI, Antigravity, and Windsurf. It organizes examples by areas including document processing, development, data analysis, communication, media, productivity, project management, security, and SaaS-app automation through Composio. The repository explains Skills as folders containing a SKILL.md file with YAML metadata and Markdown instructions, optionally accompanied by scripts, references, and assets. It documents progressive loading: agents initially see a skill's name and description, load the full instructions when relevant, and load supporting files on demand. It also distinguishes Skills, which define workflows and guardrails, from MCP servers and tools, which provide system access and individual actions. The list accepts contributions through documented quality and pull-request guidelines. The repository is licensed under Apache 2.0, while individual skills may use different licenses.

Skills for Real Engineers is an open-source collection of small, composable agent skills by Matt Pocock for disciplined software development with Claude Code, Codex, and other coding agents. The skills support requirements clarification, project-language setup, test-driven development, debugging, code review, specification, planning, triage, and codebase surveys. The collection includes skills such as `/grill-me` and `/grill-with-docs`, which question the user about a proposed change before implementation, and a setup skill that configures an issue tracker, ticket labels, and documentation storage for a repository. It can be installed as a managed Claude Code plugin or copied into a project as editable files through the `skills` installer; the skills are intended to work with any model and can be adapted by the user.