feat(invariants): require package-owned companions

packages/support/invariants/src/index.ts

@@ -1,7 +1,8 @@
 /**
  * Configurable registry for package-owned runtime invariant contributions.
- * Packages register checks from optional `./invariant` companion plugins;
- * ordinary package entrypoints stay independent of diagnostics.
+ * Every workspace package registers its name from a `./invariant` companion;
+ * ordinary package entrypoints stay independent of diagnostics, and packages
+ * without relational checks use an ownership-only installer.
  *
  * @module @deepseek-ai/dsh-invariants
  */

packages/support/invariants/src/invariant.ts

@@ -0,0 +1,30 @@
+/**
+ * Generated invariant ownership companion for `@deepseek-ai/dsh-invariants`.
+ * Replace this file with package-owned checks while preserving its registration.
+ *
+ * @generated scripts/gen-package-invariants.ts
+ * @module @deepseek-ai/dsh-invariants/invariant
+ */
+
+/* jscpd:ignore-start */
+import type { Context } from 'cordis'
+import type { InvariantInstaller } from './index.ts'
+
+const PACKAGE_NAME = '@deepseek-ai/dsh-invariants'
+
+/** Cordis companion plugin name. */
+export const name = 'invariants-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 = () => {}
+
+/**
+ * Register this package's invariant companion.
+ * @param ctx - Cordis context carrying the invariant service.
+ * @returns the installed registration's disposer after setup succeeds.
+ */
+export const apply = (ctx: Context): Promise<() => void> =>
+  Promise.resolve(ctx.invariants.register(PACKAGE_NAME, install))
+/* jscpd:ignore-end */