Composing grid canvases

A grid canvas is a composition, not an app: a grid of placements, each rendering a component canvas (a reusable widget with its own source, build, and placement contract). The user's home canvas is an ordinary grid canvas in their personal channel. Layout is data — publishing or patching one is live immediately, with no build.

Three canvas kinds share one lifecycle:

• freeform — a standalone app (the building-canvases skill owns these).
• component — a reusable widget. Same source/build pipeline as freeform, plus a placement contract. Visibility rides its channel: personal channel = private, team channel = shared.
• grid — a layout of placements referencing components. No file source; layout only.

The resolution ladder: configure, fork, build

When a grid placement needs content ("a weather widget here", "a kanban of my tasks"), resolve in this order — placing an existing component beats authoring a duplicate: