Naming collision: Task tool vs Task* system

Problem

The Task tool and Task* system (TaskCreate/TaskUpdate/TaskList/TaskGet) share the same namespace but serve different purposes:

• Task tool: Spawns SubAgents

``typescript
Task(subagent_type: "Explore", prompt: "...")
``

• Task* system: Manages work items

``typescript
TaskCreate(subject: "...", description: "...")
``

This creates confusion. When users see TaskOutput, they need to remember it's for the Task tool, not TaskCreate.

Suggestion

Rename Task tool to Agent:

Agent(subagent_type: "Explore", prompt: "...")

This aligns with the existing subagent_type parameter and eliminates the naming overlap.