feat(team-mode): add team mailbox ack with tests

src/features/team-mode/team-mailbox/ack.ts

@@ -0,0 +1,34 @@
+import { mkdir, rename } from "node:fs/promises"
+import path from "node:path"
+
+import type { TeamModeConfig } from "../../../config/schema/team-mode"
+import { getInboxDir, resolveBaseDir } from "../team-registry/paths"
+
+export async function ackMessages(
+  teamRunId: string,
+  memberName: string,
+  messageIds: string[],
+  config: TeamModeConfig,
+): Promise<void> {
+  const baseDir = resolveBaseDir(config)
+  const inboxDir = getInboxDir(baseDir, teamRunId, memberName)
+  const processedDir = path.join(inboxDir, "processed")
+  await mkdir(processedDir, { recursive: true, mode: 0o700 })
+
+  for (const messageId of messageIds) {
+    const messageFileName = `${messageId}.json`
+    const sourcePath = path.join(inboxDir, messageFileName)
+    const targetPath = path.join(processedDir, messageFileName)
+
+    try {
+      await rename(sourcePath, targetPath)
+    } catch (error) {
+      const err = error as NodeJS.ErrnoException
+      if (err.code === "ENOENT") {
+        continue
+      }
+
+      throw error
+    }
+  }
+}