# Functions S–T

Import these from `@grafloria/engine`.

## Functions

### `serializeGraph`

Freeze a live graph into the wire format.

Emits nodes and links in CANONICAL (id-sorted) order — the same discipline
Established in `fromAdapter`. Determinism needs both halves: a seeded
PRNG *and* a stable input order.

```ts
function serializeGraph(nodes: NodeModel[], links: LinkModel[]): LayoutGraph
```

### `serveLayout`

Serve layout requests on a port. This IS the worker's message loop — call it
inside the worker script with `self`, or in a test with a fake port, or (see
`LayoutHost`) on the inline side of a loopback pair.

```ts
function serveLayout(port: LayoutServePort, deps: ServeLayoutDeps = {}): void
```

### `toElkPortSide`

```ts
function toElkPortSide(side: PortSide): ElkPortSide
```

### `translateOptions`

One vocabulary in, each engine's dialect out.

The adapters disagree about names for the same concept — dagre says `rankdir`,
`nodesep`, `ranksep`; ELK says `elk.direction` with words instead of letters.

Reusing this is what stops the nested
path from quietly forking the options schema.

```ts
function translateOptions(
  engine: string,
  options: UnifiedLayoutOptions
): Partial<LayoutOptions>
```

### `treeLayout`

Tree layout over one connected component.

Component packing (see component-packing.ts) is what turns this into a FOREST
layout: each tree is laid out here, alone, and the boxes are packed afterwards. That division is why a five-tree forest comes out as five tidy trees rather
than the pile dagre produces.

```ts
function treeLayout(
  nodes: NodeModel[],
  links: LinkModel[],
  options: TreeLayoutOptions = {}
): LayoutResult
```