feat(invariants): implement package runtime checks

packages/sdk/create-sdk/src/invariant.ts

@@ -1,14 +1,8 @@
-/**
- * Generated invariant ownership companion for `@deepseek-ai/create-sdk`.
- * Replace this file with package-owned checks while preserving its registration.
- *
- * @generated scripts/gen-package-invariants.ts
- * @module @deepseek-ai/create-sdk/invariant
- */
+/** Package-owned runtime contracts for @deepseek-ai/create-sdk. @module @deepseek-ai/create-sdk/invariant */
 
 /* jscpd:ignore-start */
 import type { Context } from 'cordis'
-import type { InvariantInstaller } from '@deepseek-ai/dsh-invariants'
+import { assertInvariant, type InvariantInstaller } from '@deepseek-ai/dsh-invariants'
 
 const PACKAGE_NAME = '@deepseek-ai/create-sdk'
 
@@ -17,8 +11,26 @@ export const name = 'create-sdk-invariant'
 /** Services required before the companion can register. */
 export const inject = ['invariants']
 
-/** Reserve this package's invariant ownership until it adds relational checks. */
-const install: InvariantInstaller = () => {}
+/** Assert the bin-only entrypoint and its core argument mapping. */
+const install: InvariantInstaller = (ctx, fail) => {
+  ctx.effect(async () => {
+    const { parseCreateArgs } = await import('./args.ts')
+    const packageEntry = await import('./index.ts')
+    assertInvariant(fail, Object.keys(packageEntry).length === 0,
+      'the create-sdk library entrypoint must remain empty because the package is bin-only')
+    const parsed = parseCreateArgs([
+      'workspace', '--provider=custom', '--base-url=https://example.test', '--interface=embed', '--no-install',
+    ])
+    assertInvariant(fail,
+      parsed.directory === 'workspace'
+        && parsed.provider === 'custom'
+        && parsed.baseURL === 'https://example.test'
+        && parsed.runInterface === 'embed'
+        && parsed.install === false,
+      'create-sdk arguments must preserve directory, provider, base URL, interface, and negative install flags')
+    return () => {}
+  }, 'create-sdk: validate bin and argument contracts')
+}
 
 /**
  * Register this package's invariant companion.