A 22K‑Star GitHub Project That Turns Product Management Into Plug‑in Skills

PM Skills Marketplace Overview

PM Skills Marketplace is a plugin marketplace for Claude Code and Claude Cowork that encodes the full product‑management process into more than 100 executable skill blocks. Each block implements a concrete framework as a structured workflow triggered by a slash command.

Skill Packages

Product Discovery : brainstorming, hypothesis testing, user interviews, opportunity‑solution tree.

Product Strategy : business model canvas, pricing, SWOT, PESTLE, Porter’s Five Forces.

Execution : PRD, OKR, roadmap, sprint planning, retrospectives, stakeholder management.

Market Research : personas, segmentation, customer journey, TAM/SAM/SOM estimation.

Data Analysis : SQL generation, cohort retention analysis, A/B‑test significance.

Go‑to‑Market : beachhead segmentation, ideal customer profile, growth flywheel, competitive battle cards.

Marketing Growth : positioning, value proposition, north‑star metric definition.

Toolbox : resume review, NDA drafting, privacy policy generation, grammar checking.

AI Delivery : architecture diagram extraction, user‑flow mapping, permission matrix, variable inventory, documentation gap analysis.

Each skill is grounded in an established framework: opportunity‑solution trees (Teresa Torres), hypothesis testing (Alberto Savoia), and Jobs‑to‑Be‑Done interview guides.

Key Commands and Workflow

/discover

runs a four‑step discovery workflow: idea expansion → hypothesis listing → priority ranking → experiment design. The output for each step is predefined in the skill definition. /interview has two modes: prep generates a JTBD‑focused interview script; summarize processes transcript text into JTBD insights, satisfaction signals, and action items. /strategy produces a nine‑section product‑strategy canvas with guided questions, yielding a ready‑to‑present document. /write-prd follows an eight‑section PRD template (background, goals, user scenarios, feature description, acceptance criteria, release plan, metrics, risks) by prompting the user for each field. /red-team-prd critiques a PRD, surfacing weak assumptions and suggesting the cheapest validation methods. /market-size estimates TAM, SAM, and SOM with explicit assumptions and source citations. /sql generates annotated SQL queries; /cohort performs retention analysis with chart suggestions; /ab-test calculates statistical significance and required sample size. /gtm creates a go‑to‑market plan from beachhead segmentation to competitive battle cards; /north-star defines and decomposes a north‑star metric. /ship-check reverse‑engineers a codebase to produce architecture diagrams, user flows, permission matrices, and variable inventories, then compares them with existing documentation.

Toolbox commands include /resume, /nda, /privacy, and /grammar for quick document tasks.

Installation

For Claude Cowork (GUI), add the marketplace from GitHub with identifier phuryn/pm-skills. For Claude Code (CLI), run: claude plugin marketplace add phuryn/pm-skills Then install the nine plugins, for example:

claude plugin install pm-toolkit@pm-skills
claude plugin install pm-product-strategy@pm-skills
claude plugin install pm-product-discovery@pm-skills
claude plugin install pm-market-research@pm-skills
claude plugin install pm-data-analytics@pm-skills
claude plugin install pm-marketing-growth@pm-skills
claude plugin install pm-go-to-market@pm-skills
claude plugin install pm-execution@pm-skills
claude plugin install pm-ai-shipping@pm-skills

Real‑World Walk‑Through

Using /discover, the author validated a concept for a GitHub‑Star management tool called StarManager . The command returned a structured output containing a preliminary conclusion, target users, risky assumptions, opportunity points, suggested experiments, an MVP outline, and decision criteria.

Feeding the discovery results into /write-prd produced a complete PRD with a beta‑stage feature roadmap.

Running /market-size on the same idea generated a detailed market‑size report; the highlighted conclusion was that the market is too narrow to pursue.

Observations and Limitations

The most valuable commands for experienced product managers are /red-team-prd (identifies logical gaps in a PRD) and /ship-check (fills documentation and audit gaps for vibe‑coded projects). These tasks previously required senior colleagues or manual effort.

Limitations include heavy reliance on Claude’s context window: long PRDs or extensive discovery sessions may cause earlier steps to be omitted, requiring manual context management. The skill definitions are written in English; non‑English teams may need to polish the output language.

Repository

Open‑source repository: https://github.com/phuryn/pm-skills