# renderSubsystemBoundary

**Kind:** Function

**Source:** [`atloria-monorepo/libs/parser-core/src/techdocs/subsystems.ts`](https://github.com/sherkety/atloria/blob/main/atloria-monorepo/libs/parser-core/src/techdocs/subsystems.ts#L325)

A subsystem's boundary, stated the way the good documents state it: what it is responsible
for, and — equally — what it explicitly is not.

Returns '' when the graph cannot support the claim. A boundary asserted from dangling edges
would be confident and wrong, which is the failure mode worth avoiding above all others.

## Signature

```ts
function renderSubsystemBoundary(subsystem: Subsystem, all: Subsystem[]): string
```

## Parameters

| Name | Type |
|---|---|
| `subsystem` | `Subsystem` |
| `all` | `Subsystem[]` |

**Returns:** `string`