# @leumas/middleware

Adapter/connector engine — the BaseAdapter contract + loader + a libSQL adapter for schema-less dynamic collections (universal CRUD over the shared leumas.db).


The adapter/connector engine (P1 slice). Provides the **schema-less dynamic CRUD** path that
complements the typed core in [`@leumas/db`](../../packages/db) — both over the **same** `leumas.db`.

- `BaseAdapter` — the one storage-adapter contract (harvested from legacy `leumas-middleware`).
- `LibsqlAdapter` — stores each app-defined collection as `dyn_<name>` (id, data JSON, owner, public, timestamps), created on first write.
- `createConnector(config)` — the loader (defaults to a single libSQL adapter).
- `createDynamicCrudRouter({ adapter, requireAuth })` — Express CRUD at `/db/:collection`, ownership-gated. `requireAuth` is injected so this engine stays decoupled from `@leumas/auth`.

```js
import { createConnector, createDynamicCrudRouter } from '@leumas/middleware';
import { requireAuth } from '@leumas/auth';
const connector = createConnector();
app.use('/db', createDynamicCrudRouter({ adapter: connector.get(), requireAuth }));
```

The full adapter loader/introspection engine + the `a.*`/`b.*` adapter packs land in **P3**; P1 ships
only the DB-connector slice needed for dynamic app data.


---
Source: shared/engines/middleware/README.md
Canonical: https://docs.leumas.tech/p/engines/middleware