zagent 0.0.199

0.0.xx. Not 0.1 (owner-only).

• zagent goal / zagent subagents (official session/goal and session/subagents)
• zagent remote (this-host D1/D2 status; no second-device hop)
• $using-zagent skill (from 0.0.198)

```sh
npm install -g zagent@0.0.199
```