Persist the Board as a board-owned Seed document at a reserved, hidden path, not inside the home document and not as local UI state.

Reserved path:

/:apps/board

Then the public Board URL stays:

/:board

But internally, it loads/saves the Board state from that reserved document.

{
  "version": 1,
  "query": {
    "includes": [
      {
        "space": "site-uid",
        "path": "design",
        "mode": "AllDescendants"
      }
    ],
    "sort": [
      {
        "term": "UpdateTime",
        "reverse": true
      }
    ],
    "limit": 50
  },
  "workflow": {
    "columns": [
      {
        "id": "backlog",
        "title": "Backlog"
      },
      {
        "id": "ready",
        "title": "Ready"
      },
      {
        "id": "in-progress",
        "title": "In Progress"
      },
      {
        "id": "review",
        "title": "Review"
      },
      {
        "id": "done",
        "title": "Done"
      }
    ],
    "cards": {
      "hm://site-uid/design/example-doc": {
        "columnId": "backlog",
        "labels": ["UI", "Research"],
        "assignees": ["account-uid-1"],
        "dueDate": "2026-06-30",
        "priority": "High"
      },
      "hm://site-uid/design/another-doc": {
        "columnId": "review",
        "labels": ["Docs"],
        "assignees": [],
        "dueDate": null,
        "priority": "Medium"
      }
    }
  }
}

Key idea:

Query computes which documents appear.

Board state stores how those documents are arranged.

The Board does not store duplicate document cards.

Card overrides are keyed by document ID/path.

Why this is best:

Uses Seed’s existing document persistence, sync, publishing, identity, and permissions.

Works on desktop and web.

Does not require the home document to link to the Board.

Keeps /:board as an AppView, not a normal document page.

Avoids inventing a separate daemon database right now.

I would avoid daemon-only persistence for now because then published web Boards will not reliably work.

Recap

Persist the Board in a hidden/reserved Seed document like /.seed/board, while keeping the user-facing route as /:board. Store the query definition and workflow overrides there; compute cards dynamically from the query.

version: 1

query

includes

space: site-uid

path: design

mode: AllDescendants

sort

term: UpdateTime,

reverse: true

limit: 50

workflow

columns

id: backlog

title: Backlog

id: ready

title: Ready

id: in-progress

title: In Progress

id: review

title: Review

id: done,

title: Done

cards

hm://site-uid/design/example-doc

columnId: backlog

labels: UI, Research

assignees: account-uid-1

dueDate: 2026-06-30

priority: High

hm://site-uid/design/another-doc

columnId: review

labels: Docs

assignees:

dueDate: null

priority: Medium