<!-- BEGIN:nextjs-agent-rules -->
# This is NOT the Next.js you know

This version has breaking changes — APIs, conventions, and file structure may all differ from your training data. Read the relevant guide in `node_modules/next/dist/docs/` before writing any code. Heed deprecation notices.
<!-- END:nextjs-agent-rules -->

<!-- BEGIN:pb-select-field-gotcha -->
# PocketBase select fields are not self-service

The `order_items.item_status` field is a `select` with a fixed list of
values. If you want to set a new value (e.g. `delivery_note` for the
new delivery-note flow), you must add it to the schema in the PB admin
**first** — the API will 500 with "Failed to update record." otherwise.
The local `pb-exports/pb_schema-2.json` is a snapshot for reference
only; the source of truth is the running PB instance.

If a new code path sets a select value that doesn't exist yet, ask the
user to add it via the PB admin before debugging the API. They do this
manually (it's a UI-only change in the PB admin).
<!-- END:pb-select-field-gotcha -->

<!-- BEGIN:pb-attachments-pattern -->
# Reuse existing multi-file fields for new attachment types

The `order_items` collection has a multi-file field `order_item_attachements`
(`maxSelect: 10`, accepts any MIME). When adding a new document type
to attach to an order item (e.g. delivery note PDF), upload the file
to this field rather than creating a new attachment collection. The
operator queries by some key field on the item (e.g.
`delivery_note_number`) to find the items, then reads the attachments
off each item.

Pattern in code:
1. POST endpoint: generate the PDF, upload via multipart/form-data
   using the `order_item_attachements` field on each item in the group
2. GET endpoint: query `order_items` by the key field, find a file
   whose name matches the expected pattern (e.g. `DN26071401.pdf`),
   stream the bytes back via PB's `/api/files/...` URL
3. Stable filename per document type so the retrieval side can
   disambiguate from other attachments on the same item
<!-- END:pb-attachments-pattern -->

<!-- BEGIN:data-layer-discipline -->
# Data access layer discipline

The app has two coexisting data layers:

- **Legacy**: `src/lib/pb-helpers.ts` — used directly by Server Components
  under `src/app/(app)/**/page.tsx` and form components.
- **Current**: `src/lib/server/*-service.ts` — exposed via `/api/v1/*` route
  handlers and `/api/mcp`, used by the agent API and external integrations.

Both layers read the same PocketBase collections. Pick the right one
depending on what you're doing.

## Rules

**For new endpoints / features**: put business logic in
`src/lib/server/<feature>-service.ts` and expose it via a thin
`src/app/api/v1/<feature>/<op>/route.ts`. Do NOT extend `pb-helpers.ts`.

**For new pages / form components**: call `/api/v1/*` (or have the
Server Component call the corresponding `lib/server/*-service.ts`
function directly). Do NOT import from `pb-helpers.ts`.

**When touching a page that already uses `pb-helpers.ts`**: migrate its
data calls to the service layer in the same commit. One resource at a
time, no big-bang rewrites. Lowest-risk order: customers → orders →
quotes → suppliers → companies → everything else.

## How to spot you're reaching for the legacy layer

`pb-helpers.ts` is the file in question. Grep for it:

```bash
grep -rn 'from "@/lib/pb-helpers"' src/ --include="*.ts" --include="*.tsx"
```

Each hit is one caller to migrate when you're in the area.

## Migration cost indicator

A single page rewrite is typically: replace `getX(...)` import + call
with `await fetch('/api/v1/x?...')` (or a direct service-layer call),
then update the page to await. Half-day budget for 5 pages if no
weird cross-resource joins are involved.
<!-- END:data-layer-discipline -->