hstack

HStack

Personal agent plugin monorepo — one set of skills, three platforms.

Works as a native plugin on Claude Code, OpenAI Codex, and Cursor without any build step. Each platform reads its own manifest and discovers the shared plugins/hstack/skills/ directory.

Skills

Skill	Description
copy-editing	Professional copy editing, grammar, style guide, AI writing pattern detection, and verbosity diagnosis
data-ai-tech-strategy	Tech strategy and engineering principles for Data/AI/ML organizations
executive-coaching	Executive coaching frameworks: GROW model, NVC, active listening, burnout prevention, co-founder dynamics, CTO transition
manning-tech-book-writing	Manning Publications style, chapter structure, and writing standards
ml-paper-writing	Publication-ready ML/AI research papers for NeurIPS, ICML, ICLR, ACL, AAAI, COLM — full writing process, citation verification, LaTeX, conference checklists
tech-writing	Strategic tech blog posts and industry analysis — short-form (800-1,500 words) and long-form (2,000-4,000 words) with concision rules and AI pattern avoidance

Repository Structure

hstack/
├── .claude-plugin/
│   └── marketplace.json      # Claude Code marketplace catalog
├── .cursor-plugin/
│   └── plugin.json           # Cursor manifest
├── .agents/plugins/
│   └── marketplace.json      # OpenAI Codex marketplace catalog
├── plugins/hstack/           # Shared plugin payload
│   ├── .claude-plugin/
│   │   └── plugin.json       # Claude Code manifest
│   ├── .codex-plugin/
│   │   └── plugin.json       # OpenAI Codex manifest
│   ├── skills/               # Shared skills
│   │   └── <skill-name>/
│   │       ├── SKILL.md      # Entry point with frontmatter
│   │       └── references/   # Supporting materials
│   ├── agents/               # Custom agent definitions
│   └── commands/             # Slash commands
├── rules/                    # Cursor .mdc rules (auto-attach by file type)
│   └── <skill-name>.mdc
├── LICENSE
└── README.md

How Each Platform Discovers Skills

Platform	Manifest	Skills	Extras
Claude Code	.claude-plugin/marketplace.json -> plugins/hstack/.claude-plugin/plugin.json	plugins/hstack/skills/*/SKILL.md	plugins/hstack/agents/, plugins/hstack/commands/
OpenAI Codex	.agents/plugins/marketplace.json -> plugins/hstack/.codex-plugin/plugin.json	plugins/hstack/skills/*/SKILL.md	interface branding
Cursor	.cursor-plugin/plugin.json	plugins/hstack/skills/*/SKILL.md	rules/*.mdc with glob triggers

All three platforms use the same SKILL.md frontmatter format:

---
name: skill-name
description: When and how to use this skill
allowed-tools: "Read,Write,Edit,Bash,Glob,Grep,WebSearch,WebFetch"
---

• name + description — required by all platforms
• allowed-tools — used by Codex to scope tool access; ignored by Claude and Cursor

Installation

Claude Code

claude plugin marketplace add leehanchung/hstack
claude plugin install hstack
# Skills appear as /hstack:skill-name

For local testing from a checkout:

claude plugin marketplace add /path/to/hstack --scope local
claude plugin install hstack --scope local

For one-off session testing without installing:

claude --plugin-dir /path/to/hstack/plugins/hstack

OpenAI Codex

codex plugin marketplace add leehanchung/hstack

For local testing from a checkout:

codex plugin marketplace add /path/to/hstack

In the Codex app, add the GitHub marketplace source leehanchung/hstack, then enable the HStack plugin. Codex reads .agents/plugins/marketplace.json, resolves ./plugins/hstack, and loads plugins/hstack/.codex-plugin/plugin.json.

Cursor

Symlink or copy into your Cursor plugins directory. Rules in rules/ auto-attach to matching file types (e.g., .tex files trigger ml-paper-writing).

Adding a New Skill

1. Create plugins/hstack/skills/<skill-name>/SKILL.md with frontmatter
2. Add reference files in plugins/hstack/skills/<skill-name>/references/
3. Create rules/<skill-name>.mdc for Cursor glob-based auto-attachment
4. Update the skill table in this README

License

MIT