Why it matters
Generic AI returns text. PM Skills Marketplace returns structured, framework-driven decisions. Per the README, each skill encodes a proven PM methodology: Opportunity Solution Trees (Teresa Torres), assumption mapping, prioritization matrices, Lean Canvas, Porter's Five Forces, and more. The difference is rigor on demand, not a shelf of unread books.
The big picture
The marketplace ships as 9 plugins grouping 68 skills and 42 chained workflows. A plugin covers one PM domain: discovery, product strategy, market research, data analytics, marketing growth, go-to-market, execution, AI shipping, and a general PM toolkit. Installing the marketplace via Claude Cowork or Claude Code CLI drops all 9 plugins at once.
How it works
Skills are the atomic unit. They load automatically when Claude judges them relevant, or you can force one with /plugin-name:skill-name. Commands (slash commands like /discover or /write-prd) chain skills into multi-step workflows; /discover alone runs: brainstorm-ideas, identify-assumptions, prioritize-assumptions, and brainstorm-experiments in sequence. Each completed command surfaces the next logical command, so the workflow guides you forward.
Zoom in
The pm-product-discovery plugin alone ships 13 skills and 5 commands, covering multi-perspective ideation, assumption identification across Value/Usability/Viability/Feasibility risk categories, Impact x Risk prioritization matrices, Opportunity Solution Trees, JTBD interview scripts, and a North Star metrics dashboard designer. Strategy adds 12 more skills: Startup Canvas, Lean Canvas, Business Model Canvas, Porter's Five Forces, PESTLE, Ansoff Matrix, and pricing strategy with willingness-to-pay analysis.
Yes, but
Slash commands are Claude-specific. On Codex CLI, the skills install natively but /discover and friends don't run as slash commands. The README says to describe the workflow in plain language instead, or ask Codex to convert command files into Codex-native skills. On Cursor, Gemini CLI, OpenCode, and Kiro, you get skills only, copied manually into the tool's skills folder.
The bottom line
If you use Claude Code or Claude Cowork for PM work, this is the fastest way to put Teresa Torres and Marty Cagan's frameworks into your daily loop. It's MIT-licensed, open-source, and installs in under two minutes. The tradeoff: full slash-command power is locked to Claude; other tools get the frameworks, not the guided workflows.