shape-up

Original：🇺🇸 English

Translated

Use when asked to "shape up", "run a shaping session", "set an appetite", "scope a project without estimates", "betting table", or "ship in fixed cycles". Helps teams escape estimate-driven development and Scrum fatigue. The Shape Up method (created by Ryan Singer at Basecamp/37signals) uses fixed time boxes, variable scope, and collaborative shaping to ship meaningful work predictably.

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Sourcepmprompt/claude-plugin-product-management

Added on2026-02-15

NPX Install

npx skill4agent add pmprompt/claude-plugin-product-management shape-up

SKILL.md Content

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Shape Up

What It Is

Shape Up is a product development methodology built on one core insight: you cannot estimate your way to shipping—you must shape your way there.

Traditional approaches ask "How long will this take?" and then try to hit that estimate. Shape Up flips this: decide upfront how much time you're willing to spend (the appetite), then shape a version of the solution that fits within that constraint.

The methodology emerged from 17 years of building Basecamp, where the founding team faced an unusual constraint: their only engineer (DHH) worked just 10 hours per week. This forced extreme clarity about what to build and ruthless scoping to ensure every hour counted.

The key shift: Move from "What's the estimate for this?" to "What version of this can we confidently ship in the time we're willing to spend?"

When to Use It

Use Shape Up when you need to:

Stop projects from dragging — work that should take weeks is taking months
Escape the estimate trap — you're tired of estimates that are always wrong
Give teams real autonomy — not just ticket execution
Reduce meeting overhead — Scrum rituals are consuming your time
Ship meaningful chunks — not just incremental tickets
Align product and engineering — there's a wall between them today
Maintain startup speed — as you scale past 30-50 people

When Not to Use It

You're 3 people or fewer — just talk to each other
There's no real complexity
You can't get engineering into shaping
Leadership isn't bought in
You're doing pure maintenance

Resources

Books:

Shape Up by Ryan Singer (free at basecamp.com/shapeup)
Demand-Side Sales 101 by Bob Moesta