feat(hooks): add task-resume-info hook

Add hook for injecting task resume information into tool outputs.
Enables seamless continuation of background agent sessions.

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

src/hooks/task-resume-info/index.ts

@@ -0,0 +1,36 @@
+const TARGET_TOOLS = ["task", "Task", "call_omo_agent", "sisyphus_task"]
+
+const SESSION_ID_PATTERNS = [
+  /Session ID: (ses_[a-zA-Z0-9_-]+)/,
+  /session_id: (ses_[a-zA-Z0-9_-]+)/,
+  /<task_metadata>\s*session_id: (ses_[a-zA-Z0-9_-]+)/,
+  /sessionId: (ses_[a-zA-Z0-9_-]+)/,
+]
+
+function extractSessionId(output: string): string | null {
+  for (const pattern of SESSION_ID_PATTERNS) {
+    const match = output.match(pattern)
+    if (match) return match[1]
+  }
+  return null
+}
+
+export function createTaskResumeInfoHook() {
+  const toolExecuteAfter = async (
+    input: { tool: string; sessionID: string; callID: string },
+    output: { title: string; output: string; metadata: unknown }
+  ) => {
+    if (!TARGET_TOOLS.includes(input.tool)) return
+    if (output.output.startsWith("Error:") || output.output.startsWith("Failed")) return
+    if (output.output.includes("\nto resume:")) return
+
+    const sessionId = extractSessionId(output.output)
+    if (!sessionId) return
+
+    output.output = output.output.trimEnd() + `\n\nto resume: sisyphus_task(resume="${sessionId}", prompt="...")`
+  }
+
+  return {
+    "tool.execute.after": toolExecuteAfter,
+  }
+}