chore(8.0): final pre-RC1 sweep — API consistency, named errors, orphans, zero-cast codebase

src/plugin.ts

@@ -5,7 +5,8 @@
  * 1. Native acceleration (@soulcraft/cortex)
  * 2. Custom storage adapters (e.g., Redis, DynamoDB, custom backends)
  *
- * Plugins are auto-detected by package name or registered manually.
+ * Plugins are loaded from an explicit `plugins: [...]` config list or
+ * registered manually via `brain.use()` — there is no implicit detection.
  */
 
 import type {