# Prerequisites for Running Commands in PM Skills: Complete Setup Guide > Learn the essential prerequisites for running commands in PM Skills. Install clients, register repositories, and set up domain plugins to start executing commands now. - Repository: [Pawel Huryn/pm-skills](https://github.com/phuryn/pm-skills) - Tags: getting-started - Published: 2026-06-28 --- **Before you can execute any slash command in the PM Skills marketplace, you must install the Claude Cowork or Claude Code client, register the phuryn/pm-skills repository as a plugin marketplace, and install the specific domain plugins that contain the commands you want to run.** The PM Skills repository (`phuryn/pm-skills`) ships as a collection of Claude-specific plugins that expose product management skills through slash commands like `/discover` and `/write-prd`. Understanding the prerequisites for running commands is essential because these commands are not standalone scripts but integrations that rely on Anthropic's Claude ecosystem to parse, load, and execute the underlying logic defined in markdown files. ## Claude Client Requirements The commands are Claude-specific "slash commands" that require either the **Claude Cowork** UI or **Claude Code** CLI to parse and execute them. ### Claude Cowork (UI) For the graphical interface, navigate to **Customize → Browse plugins → Personal → +** and select *Add marketplace from GitHub* with the repository `phuryn/pm-skills`. According to the [`README.md`](https://github.com/phuryn/pm-skills/blob/main/README.md) (lines 50-61), this registers the marketplace in the Cowork environment. ### Claude Code (CLI) For command-line usage, install the Claude Code CLI and ensure you have **Python 3.9+** available, as the supporting [`validate_plugins.py`](https://github.com/phuryn/pm-skills/blob/main/validate_plugins.py) script and CLI tooling are written in Python. You can install Python via `pyenv` or your system package manager. ## Marketplace Registration Before installing individual plugins, you must register the repository as a plugin marketplace so Claude knows where to fetch the plugin definitions. Run the following command from your terminal: ```bash claude plugin marketplace add phuryn/pm-skills ``` This step is documented in [`README.md`](https://github.com/phuryn/pm-skills/blob/main/README.md) lines 63-68. Once registered, the CLI can resolve plugin references against the `phuryn/pm-skills` repository. ## Plugin Installation Each domain (toolkit, strategy, discovery, etc.) is packaged as a separate plugin. Commands live inside these plugins, so they must be installed before the slash commands are recognized. Install a specific plugin using the marketplace reference: ```bash claude plugin install pm-toolkit@pm-skills ``` As noted in [`README.md`](https://github.com/phuryn/pm-skills/blob/main/README.md) (lines 70-78), you must install the specific plugin that contains the commands you intend to use. For example, to run `/discover`, you need the `pm-product-discovery` plugin; for `/write-prd`, you need `pm-execution`. ## Network and API Requirements ### GitHub Access The CLI fetches the plugin manifest ([`.claude-plugin/plugin.json`](https://github.com/phuryn/pm-skills/blob/main/.claude-plugin/plugin.json)) from the remote repository during installation. Ensure outbound HTTPS to GitHub is allowed through your firewall. ### Optional: OpenAI API for Codex CLI If you prefer using the Codex CLI instead of Claude Code, you need an OpenAI API key and the `codex` binary installed. The repository provides only the plugin manifest; it does not bundle the Codex CLI itself. ## How Commands Execute Once the prerequisites for running commands are satisfied, the CLI parses the slash command, loads the appropriate plugin, and invokes the underlying skills defined in markdown files. For example, when you run: ```bash claude /discover "AI-powered meeting summarizer for remote teams" ``` The CLI: 1. Parses the `/discover` slash command 2. Loads the `pm-product-discovery` plugin (source: [`pm-product-discovery/commands/discover.md`](https://github.com/phuryn/pm-skills/blob/main/pm-product-discovery/commands/discover.md)) 3. Sequentially invokes the four underlying skills: *brainstorm-ideas*, *identify-assumptions*, *prioritize-assumptions*, and *brainstorm-experiments* ## Common Command Examples After completing setup, you can invoke any command defined under `pm-*/commands/*.md`: **Run a full discovery cycle:** ```bash claude /discover "AI-powered meeting summarizer" ``` Chains skills defined in [`pm-product-discovery/commands/discover.md`](https://github.com/phuryn/pm-skills/blob/main/pm-product-discovery/commands/discover.md). **Create a PRD:** ```bash claude /write-prd "Smart notification system" ``` Generates an 8-section Product Requirements Document via [`pm-execution/commands/write-prd.md`](https://github.com/phuryn/pm-skills/blob/main/pm-execution/commands/write-prd.md). **Generate a North Star metric:** ```bash claude /north-star "Two-sided marketplace connecting freelancers" ``` Returns metrics defined in [`pm-marketing-growth/commands/north-star.md`](https://github.com/phuryn/pm-skills/blob/main/pm-marketing-growth/commands/north-star.md). ## Key Configuration Files Understanding these source files helps troubleshoot setup issues: - **[`README.md`](https://github.com/phuryn/pm-skills/blob/main/README.md)** (lines 50-78): Contains step-by-step installation instructions for marketplace registration and plugin installation. - **[`pm-toolkit/.claude-plugin/plugin.json`](https://github.com/phuryn/pm-skills/blob/main/pm-toolkit/.claude-plugin/plugin.json)**: The plugin manifest required by Claude Code for registration and validation. - **`pm-toolkit/commands/*.md`**: Concrete slash-command definitions (e.g., `/tailor-resume`). - **[`pm-product-discovery/commands/discover.md`](https://github.com/phuryn/pm-skills/blob/main/pm-product-discovery/commands/discover.md)**: Defines the `/discover` workflow. - **[`pm-execution/commands/write-prd.md`](https://github.com/phuryn/pm-skills/blob/main/pm-execution/commands/write-prd.md)**: Defines the `/write-prd` command structure. - **[`pm-marketing-growth/commands/north-star.md`](https://github.com/phuryn/pm-skills/blob/main/pm-marketing-growth/commands/north-star.md)**: Contains the `/north-star` command logic. ## Summary - **Prerequisites for running commands** in PM Skills require the Claude Cowork or Claude Code client, Python 3.9+, and network access to GitHub. - You must register the marketplace with `claude plugin marketplace add phuryn/pm-skills` before installing individual plugins. - Install specific domain plugins (e.g., `pm-toolkit@pm-skills`) to enable their respective slash commands. - Commands are defined in markdown files under `pm-*/commands/` directories and parsed by the Claude client at runtime. - Optional Codex CLI usage requires separate OpenAI API credentials. ## Frequently Asked Questions ### Do I need to install all plugins to use one command? No. You only need to install the specific plugin that contains the command you want to run. For example, to use `/discover`, install only the `pm-product-discovery` plugin using `claude plugin install pm-product-discovery@pm-skills`. ### Can I run these commands without the Claude Code CLI? Yes. If you use Claude Cowork (the UI), you can add the marketplace through the interface at **Customize → Browse plugins → Personal → +** and skip the CLI registration steps, though you still need to install the individual plugins through the UI. ### What Python version is required and why? Python 3.9 or higher is required because the [`validate_plugins.py`](https://github.com/phuryn/pm-skills/blob/main/validate_plugins.py) script and Claude Code CLI tooling rely on Python features introduced in 3.9+. The CLI uses Python to parse plugin manifests and validate command structures before execution. ### Where are the actual command definitions stored? Command definitions live in markdown files within each plugin's `commands/` directory. For example, the `/write-prd` command is defined in [`pm-execution/commands/write-prd.md`](https://github.com/phuryn/pm-skills/blob/main/pm-execution/commands/write-prd.md), while the `/north-star` command resides in [`pm-marketing-growth/commands/north-star.md`](https://github.com/phuryn/pm-skills/blob/main/pm-marketing-growth/commands/north-star.md).