pm-skills for Claude Code and Codex: a product planning skill pack, installed and run

pm-skills is a marketplace that bundles product planning work, from discovery to launch, into skills for Claude Code and Codex. Paweł Huryn of The Product Compass newsletter created it, and the repository has collected 26,398 stars. This post walks through what it is for, who should install it, how the first run goes, and the one place where the two agents behave differently.

What problem it solves

Product planning has a shape that repeats. You start with a rough idea, pull out the assumptions hiding inside it, pick the riskiest ones, design an experiment, and only then write a document that a development team can build from. Most people do this from memory or from a template they copied years ago. pm-skills turns each of those steps into a skill, and it chains the skills into workflows so that one command leads to the next. The pack holds nine plugins, 69 skills, and 42 workflows.

The methods are not invented for the repository. The README says the skills incorporate approaches from Teresa Torres and Marty Cagan, and they also include Alberto Savoia’s pretotyping methods. If you have read those authors, you will recognize the vocabulary. If you have not, the skills give you a usable version of their process without the reading list.

Who it fits

The chapter rates the fit for several situations. Three of them are enough to decide.

Situation	Fit	Reason
Testing a new service hypothesis	Good fit	Assumptions and experiment design
Writing a PRD before development	Good fit	Provides a PRD template
Analyzing A/B test results	Okay	Few analysis skills

The main users are product planners and product managers, and the main outputs are PRDs, strategy canvases, and OKRs. If your need is bookkeeping, there is nothing here for you, because the pack has no accounting skills.

Install and first run

The commands below add the marketplace and install the execution plugin, which holds the PRD writer. The same two steps work for Codex.

# Add the Claude Code marketplace and install the execution plugin
claude plugin marketplace add phuryn/pm-skills
claude plugin install pm-execution@pm-skills
# Install the same plugin in Codex
codex plugin marketplace add phuryn/pm-skills
codex plugin add pm-execution@pm-skills

After installing, call a command that fits your goal. The /discover command starts from a product idea, and /write-prd produces a document on an eight-section template. Skills also activate on their own when they fit the conversation, and you can call one directly with the /plugin-name:skill-name form.

/discover
[product idea to validate]

The README describes a sequence, and each command suggests the next one when it finishes. Discovery commands expand the idea and surface its assumptions. Priority commands weigh hypotheses by impact and risk, then design experiments for the ones that matter. The execution plugin writes the PRD at the end. The install commands above cover only the execution plugin, but the README explains how to install all nine plugins the same way. It also advises installing at the plugin level rather than picking a single skill, because a workflow may call several skills together.

What trips people up

Invocation differs in Codex. The slash commands above are Claude Code commands. In Codex, the README says to call skills by name instead. The command files that the plugin installs do not run in Codex and stay on disk as reference material. You can ask Codex to read those files and convert them into skills, which is a workable detour, but it is a step you have to take yourself. Plan for it before you promise a teammate that the same workflow runs in both agents.

Where this comes from

This post adapts part of chapter 01-02 of The Claude Code & Codex Skills Guidebook. The full chapter covers the plugin-by-plugin breakdown with an example command for discovery, strategy, go-to-market, and tools, and the legal-draft skills such as the NDA and privacy policy writers together with the review caveats that come with them, and the book has 52 more skills like this one. Read the full chapter in The Claude Code & Codex Skills Guidebook on Leanpub.