feat(core): add command, intent, and routing primitives

src/memory/categories.ts

@@ -0,0 +1,11 @@
+export const MEMORY_CATEGORIES = ['facts', 'preferences', 'decisions', 'projects'] as const;
+
+export type MemoryCategory = (typeof MEMORY_CATEGORIES)[number];
+
+export function isMemoryCategory(value: string): value is MemoryCategory {
+  return (MEMORY_CATEGORIES as readonly string[]).includes(value);
+}
+
+export function categoryNamespace(baseNamespace: string, category: MemoryCategory): string {
+  return `${baseNamespace}/${category}`;
+}