Start Stackable is a WordPress block theme (FSE).
The target is a complete Default site on activate and the shell for Stackable Site Kits.
The repo today is a scaffold toward that target.
Current phase status and how to implement live in prd/start-stackable.md.
Glossary: CONTEXT.md
PRD (agents): prd/start-stackable.agents.md
PRD (devs): prd/start-stackable.md
Implementation plan: prd/start-stackable.plan.md
Acceptance check: prd/start-stackable.check.md
theme.json + styles/ design system (Default)
templates/ + parts/ + patterns/ header, footer, canvases, blog
src/ → assets/build/ header-flag CSS/JS (theme.json cannot express)
functions.php enqueue, body class, recommend plugin, flags host
▲
│ CONTRACT snap-in (plugin writes flags / variation / styles overlay)
│
Stackable plugin Site Kit import (not Default; never on activate)
Default is the theme. Kits and Design Library content do not live in this repo.