From idea to design brief in an afternoon — with a senior PM, four world-class reviewers, and a daily CEO/CPO challenge in the loop.
pstack is a Claude Code skill pack for product builders. Inspired by Garry Tan's gstack, it distils the product-thinking canon — Cagan, Doshi, Rachitsky, Hustle Badger, JTBD, North Star, ikigai — into a set of skills you invoke directly in your AI-assisted workflow.
git clone --single-branch --depth 1 https://github.com/bhaskarmanam/pstack.git \
~/.claude/skills/pstack
cd ~/.claude/skills/pstack && ./setupFlat commands: /vision, /prd, /design-brief, …
git clone https://github.com/bhaskarmanam/pstack.git
claude --plugin-dir ./pstackNamespaced commands: /pstack:vision, /pstack:prd, …
Start here after install:
/onboard
| Command | What it does |
|---|---|
/vision |
Draft or refine a product vision doc |
/strategy |
Turn the vision into a focused bet: segment, sequencing, the insight, success definition |
/opportunity |
Optional per-bet discovery assessment (four risks, riskiest assumption, kill criteria) before a PRD |
/north-star |
Optional metric design session: one North Star Metric + 3–5 inputs with causal story + guardrails |
/prd |
Draft a rigorous PRD grounded in the strategy |
/design-brief |
Produce a design brief from a PRD |
/critique |
Score any artifact against its rubric; list top gaps |
/cagan-review |
Review through Marty Cagan's lens (four risks, outcomes > output) |
/shreyas-review |
Review through Shreyas Doshi's lens (LNO, high agency) |
/lenny-review |
Review through Lenny Rachitsky's lens (growth loops, activation) |
/ravi-review |
Review through Ravi Mehta's lens (12 competencies, outcome accountability, strategy stack) |
/julie-review |
Review through Julie Zhuo's lens (problem-first, intentionality, simplicity as discipline) |
/bhaskar-review |
Review through a heart-centric, purpose-led, ikigai lens |
/challenge |
Surface a daily CEO/CPO provocation grounded in your current project |
/onboard |
Seed your user profile for cross-project personalization |
/pstack-status |
Dashboard across all your pstack projects |
/pstack-upgrade |
Pull latest pstack + diff new skills |
/pstack-help |
Context-aware next-action recommendation |
/pstack-learn |
Distil feedback logs into framework improvement proposals |
The gated spine is vision → strategy → PRD → design brief. Each stage requires the prior artifact to score ≥ 2.5 on its rubric — so you can't write a PRD until the bet itself has survived a scored critique. That's the point: most tools generate artifacts; pstack refuses to let you spec the wrong thing. /opportunity is an optional, per-bet discovery step between strategy and PRD — it pressure-tests one risky bet and gates nothing.
Generators (/vision, /strategy, /prd, /design-brief) run an internal draft→critique→revise loop before surfacing output — you only see post-revision work. Each reads prior artifacts for context, interviews you with 3-5 focused questions, references the knowledge base, then writes a numbered artifact to ./pstack-workspace/<project>/.
Reviewers (/critique, /*-review) are read-only. Output goes to pstack-workspace/<slug>/reviews/. They never modify your source artifacts.
Personas are structured persona.yaml files — adding a new reviewer is a one-file drop.
Challenges fire daily, read your current artifacts, and produce a provocation grounded in this product, right now — not generic leadership advice.
knowledge/
├── INDEX.md # Quick-reference for all frameworks
├── frameworks/ # Distilled product-leader canon
├── rubrics/ # YAML scoring rubrics per artifact type
├── calibration/ # Score-2 / score-3.5 / score-5 reference artifacts
├── challenges/ # 40+ CEO/CPO lens seeds across 6 lenses
└── schemas/ # YAML/JSON schemas for all structured files
skills/ # 19 skill directories (one per command)
tests/ # Eval harness with golden snapshots
feedback/ # Per-skill user feedback logs (gitignored)
See ROADMAP.md. v0.2.1 shipped three new skills: /ravi-review, /julie-review, and /north-star. Next: /metrics-plan and /pstack-status enhancements. v0.3 adds team-mode.
See CONTRIBUTING.md. The highest-value contributions are new framework distillations, new persona reviewers, and new challenge seeds.
pstack stands on the shoulders of:
- Marty Cagan — SVPG / Inspired
- Shreyas Doshi — Writings and talks on product leadership
- Lenny Rachitsky — Lenny's Newsletter
- Hustle Badger — hustlebadger.com
- Héctor García & Francesc Miralles — Ikigai
- Brené Brown — Dare to Lead (heart-centric leadership)
- Ravi Mehta — ravi-mehta.com / Reforge (12 competencies, product strategy stack)
- Julie Zhuo — The Making of a Manager / The Looking Glass (design leadership, intentionality)
- Garry Tan — gstack for the install pattern and inspiration
MIT License — see LICENSE.