unify agent items into a flat file-based store, drop the marketplace

Replace the marketplace service dependency and the native/global/user
scope tiers with a single external directory ($OFFICER_ITEMS_DIR) holding
skills, tools, tasks, processes and extensions as plain files.

- tasks move from Postgres to TASK.md files (new file-backed task layer);
  task editing now works, which the DB path never supported
- skills/tools/processes collapse into one shared file router (single dir)
- remove the marketplace client (sync-marketplace/sync-version) and the
  boot-time sync; pi-bridge/pi-manager/sandbox point at the flat store
- drop the dead tasks + vestigial skills/tools/processes/extensions +
  item_chats tables (migration 0004)
- one-time migration script exports DB tasks and consolidates disk items

Migration verified: all 6 tasks round-trip through the runtime parser
identically to their DB rows (pipeline steps, triggers, script impls and
agentic bodies all intact).

NOTE: not yet functionally tested end-to-end — every item (each task mode,
tool, skill, extension) still needs to be run/exercised in the app before
this is trusted. To be done manually.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/servers/api/tasks/pipeline-executor.ts

@@ -3,7 +3,8 @@ import { randomUUID } from 'crypto';
 import { readdirSync, existsSync, mkdirSync, writeFileSync, chmodSync, rmSync } from 'node:fs';
 import { join } from 'node:path';
 import { tmpdir } from 'node:os';
-import { getTaskByDirName, getUserSettings } from 'officerdb';
+import { getUserSettings } from 'officerdb';
+import { getTaskByDirName } from './task-files';
 import { getHomeDirForRole, getHomeDir } from '../../data-path';
 import { resolveBaseCwd } from '../pi/websocket';
 import { SANDBOX_HOME } from '../../sidecar/sandbox';
@@ -471,7 +472,7 @@ export type ExecutePipelineParams = {
 };
 
 export async function executePipeline({ userId, email, username, role, taskDirName, inputs, cwd, model: modelOverride, startAt, abortSignal, emit }: ExecutePipelineParams): Promise<void> {
-  const pipelineTask = await getTaskByDirName(taskDirName, userId);
+  const pipelineTask = await getTaskByDirName(taskDirName);
   if (!pipelineTask) {
     emit({ type: 'error', message: `Task not found: ${taskDirName}` });
     return;
@@ -514,7 +515,7 @@ export async function executePipeline({ userId, email, username, role, taskDirNa
 
     const step = config.steps[stepIdx]!;
 
-    const stepTask = await getTaskByDirName(step.task, userId);
+    const stepTask = await getTaskByDirName(step.task);
     if (!stepTask) {
       emit({ type: 'error', message: `Step task not found: ${step.task}` });
       return;
@@ -648,7 +649,7 @@ export async function message(ws: ServerWebSocket<WSData>, raw: string | Buffer)
         const { userId, email, username, role } = ws.data;
 
         // Resolve task name for the DB record
-        const task = await getTaskByDirName(msg.taskDirName, userId);
+        const task = await getTaskByDirName(msg.taskDirName);
         if (!task) {
           send(ws, { type: 'error', message: `Task not found: ${msg.taskDirName}` });
           return;