feat: package Pi extensions as Bun workspaces

extensions/todo-herdr/src/prompt.ts

@@ -0,0 +1,22 @@
+import type { Task } from "./types.ts";
+import { orderedTreeRows } from "./ui.ts";
+
+export const COMPACTION_REMINDER_TYPE = "pi-todo-herdr-compaction";
+export const COMPACTION_REMINDER =
+  "Active tasks exist. Call list_task now; treat its result as authoritative.";
+
+export const TASK_PROMPT_GUIDELINES = [
+  "For work with 3+ distinct steps, explore enough to understand the scope, then call set_tasks before implementation; otherwise skip tracking. Start one task in-progress.",
+  "Use patch_tasks when tasks start, block, or finish; keep statuses accurate before the final response.",
+];
+
+export function formatCompactTaskTree(tasks: Task[]): string {
+  if (tasks.length === 0) return "No tasks.";
+  return orderedTreeRows(tasks)
+    .map(({ task, prefix }) => `${prefix}${task.id} [${task.status}] ${task.name}`)
+    .join("\n");
+}
+
+export function hasUnfinishedTasks(tasks: Task[]): boolean {
+  return tasks.some((task) => task.status !== "done");
+}