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ProductKit — Verified Claude Plugins for Product Teams
Most AI plugins hope they work. ProductKit proves it.
Opinionated Claude plugins for PMs, designers, engineers, and researchers — built with the same eval-driven development practices used by serious AI product teams. Each plugin ships with a behavioral eval harness: an LLM-as-judge test suite that verifies the skill actually changes Claude's behavior, not just that the file parses.
What Sets This Apart
Most Claude plugin repos have zero behavioral testing. Their CI proves files parse. That's it.
ProductKit ships a two-call LLM-as-judge eval harness: every plugin has a test suite of behavioral cases. A subject call loads the skill and generates a response. A grader call scores the response against falsifiable criteria — "did Claude refuse to write the PRD before asking clarifying questions?" "did it flag the vanity metric?" Each case gets a weighted pass/fail score with a 75% threshold.
31 cases across 3 plugins. Every case you can read, run, and extend.
Available Plugins
| Plugin | For | Description | Status |
|---|---|---|---|
| Strategic PM | Product Managers | PRDs, roadmaps, competitive analysis, user research, AI product playbook | ✅ Live |
| Product Writing Studio | All roles | Exec comms, strategy memos, board decks, stakeholder emails | ✅ Live |
| PM Interview Prep | PMs (job seekers) | Mock interviews, structured answer coaching, product sense & execution questions | ✅ Live |
| UX Strategy | Designers | UX heuristics, design system thinking, usability audits, interaction patterns | 🔜 Coming soon |
| Metrics & Analytics | PMs, Data, Eng | Dashboard design, metric trees, experiment analysis, statistical rigor checks | 📋 Planned |
Want to build a plugin? See CONTRIBUTING.md — we're actively looking for contributors across product, design, engineering, and research.
Quick Start
Claude Code (recommended — auto-updates when we ship improvements)
Open your terminal and run these commands inside Claude Code:
Step 1: Add the marketplace
/plugin marketplace add shahcolate/Product-Kit
This clones the repo locally. You only do this once.
Step 2: Install the plugin
/plugin add strategic-pm
When prompted, choose your scope:
- User scope — available across all your projects
- Project scope — only available in the current project
Step 3: Enable auto-updates (recommended) When prompted during install, select auto-update. New versions will sync automatically every time Claude Code starts.
To update manually at any time:
/plugin marketplace update
That's it. Claude will automatically load Strategic PM whenever you're doing product work. No extra commands needed — just start working.
Claude.ai (manual upload)
- Download the latest ZIP from the Releases page
- Go to Settings → Capabilities → Skills
- Click "Upload skill" and upload the ZIP
- Claude auto-loads it whenever the relevant work is detected
Claude.ai doesn't support auto-updates yet. ⭐ Star this repo and watch releases to get notified when new versions ship.
Team & Enterprise (org-wide deployment)
Organization Owners can provision plugins centrally from admin settings. Admin-provisioned skills are enabled by default for all users — one upload covers your entire product team.
Claude API
Skills are supported via the /v1/skills API endpoint. See Anthropic's Skills documentation for integration details.
Plugins
🧠 Strategic PM
Turn Claude from a template-filler into an opinionated PM co-pilot.
500+ lines of product strategy instruction: the Five Laws, Devil's Advocate Protocol, Decision Journal, PM Maturity Adapter, AI Product Management Playbook, and anti-pattern detection for 13 common PM failure modes.
✍️ Product Writing Studio
Claude becomes an expert product communicator — not a generic writer.