@studnicky/known-types-outside-adapters

Bans any and unknown outside a configured adapters layer. It is implemented and registered in the plugin, but substrate deliberately does not enable it.

The rule fits a business-logic core with one conversion boundary: adapters accept untyped input and the rest of the system consumes converted values. Substrate has neither. It is a four-band toolkit of utility and infrastructure packages, with defensive narrowing inside every band rather than one adapter edge.

The measured result confirms that mismatch: choosing the best possible adapter band produces 587 violations and the worst produces 1144. unknown is substrate's narrowing idiom, with approximately 1177 uses across every band; it is the deliberate alternative to any, not unconverted boundary data.

Fixable: No · Options: Yes · Suggested severity for a matching architecture: error

Behavior when enabled

For a file resolved to any non-adapter layer, the rule reports syntactic any and unknown keywords. With TypeScript parser services, it also reports a type reference that resolves to any or unknown. Files that resolve to the configured adapter layer, and files that do not resolve to any configured layer, are skipped.

Layers resolve through the shared ordered bindings configuration described by layer-import-boundary. The option adapterLayerName defaults to "adapters".

{
  '@studnicky/known-types-outside-adapters': ['error', {
    layers: ['domain', 'ports', 'application', 'adapters', 'infrastructure'],
    sourceRoot: 'src',
    bindings: [
      { kind: 'folder', layer: 'domain', pattern: 'domain' },
      { kind: 'folder', layer: 'ports', pattern: 'ports' },
      { kind: 'folder', layer: 'application', pattern: 'application' },
      { kind: 'folder', layer: 'adapters', pattern: 'adapters' },
      { kind: 'folder', layer: 'infrastructure', pattern: 'infrastructure' }
    ]
  }]
}

✗ Incorrect

// filename: src/domain/user/User.ts
function parse(input: any): void {}

// filename: src/domain/user/User.ts
function parse(input: unknown): void {}

✓ Correct

// filename: src/adapters/HttpAdapter.ts
function parse(input: any): unknown { return input; }

// filename: scripts/build.ts
function parse(input: any): void {}

Use this rule when your application actually has the described conversion boundary. Substrate's configuration leaves it disabled.