refactor: consolidate agent/editor plugins under integrations/ (#5491)

Co-authored-by: Claude <noreply@anthropic.com>

integrations/pi-agent-plugin/src/memory/formatting.ts

@@ -0,0 +1,43 @@
+interface MemoryLike {
+  id: string;
+  memory?: string;
+  categories?: string[];
+  createdAt?: Date | string;
+}
+
+export function formatAge(date: Date | string): string {
+  const d = typeof date === "string" ? new Date(date) : date;
+  const ms = Date.now() - d.getTime();
+  const minutes = Math.floor(ms / 60_000);
+  if (minutes < 60) return `${minutes}m ago`;
+  const hours = Math.floor(minutes / 60);
+  if (hours < 24) return `${hours}h ago`;
+  const days = Math.floor(hours / 24);
+  return `${days}d ago`;
+}
+
+export function formatMemoryCompact(mem: MemoryLike): string {
+  const cat = mem.categories?.[0] ?? "uncategorized";
+  const age = mem.createdAt ? ` (${formatAge(mem.createdAt)})` : "";
+  return `[${cat}] ${mem.memory ?? "(empty)"}${age} [mem0:${mem.id}]`;
+}
+
+export function formatMemoryList(memories: MemoryLike[]): string {
+  if (memories.length === 0) return "No memories found.";
+  return memories
+    .map((m, i) => `${i + 1}. ${formatMemoryCompact(m)}`)
+    .join("\n");
+}
+
+export function groupByCategory(
+  memories: MemoryLike[],
+): Map<string, MemoryLike[]> {
+  const groups = new Map<string, MemoryLike[]>();
+  for (const m of memories) {
+    const cat = m.categories?.[0] ?? "uncategorized";
+    const list = groups.get(cat) ?? [];
+    list.push(m);
+    groups.set(cat, list);
+  }
+  return groups;
+}