---
name: kanban
when: kanban board, task board, trello-style board, workflow columns — a persistent board whose cards move between columns and stick across refresh. Needs a database → runtime → local edition.
needs: database
deploy: runtime
editions: local
capabilities_note: persistent — needs a database (Mongo). Runtime app, async build, local edition only. Declare the canonical `needs: { database: true }`; the deployer injects DATABASE_MONGODB_URL (+legacy MONGODB_URL).
summary: Build a persistent Next.js + Mongo kanban board on the grid — a `cards` collection (title, column, order) with three columns and move-between-columns + add/delete. Edition-gate first, scaffold, put the app under services/web/, wire process.env.DATABASE_MONGODB_URL (legacy MONGODB_URL fallback) lazily, declare needs:{database:true} (not requires:), deploy async, poll to a live URL.
---

# Workflow: kanban

The user wants a kanban / trello-style board that **remembers** its cards — cards
that move between columns and survive refresh, shared across sessions. That is a
**runtime app** backed by the grid's shared Mongo, not a static page. It is the
same proven shape as `app-with-data`, with a `cards` domain (title, column of
todo/doing/done, order) and three columns with move-between-columns.

Follow this recipe. Be honest that a runtime deploy is async (not instant like a
static drop) and that it needs the local edition.

## 1. Edition check FIRST (hard gate)

A persistent app is a built + deployed container. It requires the **local
edition** (Claude Desktop / Claude Code) or the CLI.

- **Hosted edition (Claude Web / hosted MCP):** you CANNOT build a runtime app —
  hosted is inline-only and can only publish static pages. Tell the user
  plainly, offer a **static version** instead, and STOP the runtime path here.
- **Local edition:** continue.

## 2. Auth + grid

1. Ensure signed in: `grid_login_status`; if not, `grid_login`.
2. A grid is required. Respect the grid picker: if the user has more than one
   grid, ask which to use; do not assume a target.

## 3. Scaffold

`grid new <name>`. It scaffolds the project folder and writes a `cloudgrid.yaml` with an EMPTY
`services: {}`. No server entity exists yet — the first `grid plug` auto-creates
it from the manifest (honoring its `name:`) and writes `.cloudgrid/link.json`.
Then (a) write the app under **`services/web/`**,
and (b) fill `cloudgrid.yaml` to the shape below (`services.web` + `needs:
{ database: true }`).

## 4. Add the datastore + wire Mongo

1. Set `cloudgrid.yaml`. **App code MUST live under `services/<name>/`** —
   `path:` is the URL mount, NOT the filesystem path.
   ```yaml
   name: my-board
   services:
     web:
       type: nextjs
       path: /
   needs:
     database: true
   ```
   **Declare the datastore with `needs: { database: true }`** — the canonical
   shape. The deployer provisions Mongo and injects `DATABASE_MONGODB_URL` (plus
   the legacy `MONGODB_URL` alias). `requires:` is the deprecated v1 alias; don't
   author new yaml with it, and never set `needs:` and `requires:` together (the
   validator rejects it).
2. Fetch the template for the Mongo wiring + CRUD shape:
   `grid_get_template("template", "kanban")`. It is a minimal, real Next.js +
   `mongodb`-driver board under `services/web/`: a lazy client in
   `services/web/lib/db.js`, an App-Router GET/POST/PATCH/DELETE route on a
   `cards` collection (PATCH moves a card between columns), a server-component
   page, and a client board.
3. Adapt it (rename the collection, change the columns/fields, adjust the UI).
   **Read the DB from `process.env.DATABASE_MONGODB_URL`** (legacy
   `process.env.MONGODB_URL` fallback) — the grid injects it at dev-time and
   runtime.
   - **Put the DB connection behind a lazy getter — never read the connection
     string at module top level, or `next build` fails.**
   - (Optional) fetch `grid_get_template("example", "kanban")` for a richer filled
     reference to imitate.

## 5. (Optional) Run locally

Mention that the user can `grid dev` to run locally against the injected Mongo
before deploying. Don't require it.

## 6. Config

- API keys / secrets → `grid secrets set`. Non-secret config → `grid env set`.
- Do **NOT** set the DB connection vars yourself (`DATABASE_MONGODB_URL` or the
  legacy `MONGODB_URL`) — the grid injects them.

## 7. Deploy (async)

Deploy the folder with `grid_plug`. A **runtime deploy is ASYNC**: the first
response is `status: "building"`, NOT a live URL yet.
- Poll `grid_check_deploy` (or the returned poll_url) until the entity is live.
- Surface a liveness signal while it builds — never a bare silent wait.
- Only once it is live, return the deployed app URL (NOT the build/log link).

## 8. Return the live URL + iterate

Give the user the live app URL — that is the deliverable. To iterate, re-plug the
SAME entity so it updates the same URL. Keep it honest: async build, local-edition
only, credentials injected by the grid.