Rebase harness CLI on ninja 0.4.0: adds structured --json JSONL event stream (reasoning/message/command/result) for host UI integration. Bundles the ninja-subnet/ninja agent.
Rebase harness CLI on ninja 0.4.0: adds structured --json JSONL event stream (reasoning/message/command/result) for host UI integration. Bundles the ninja-subnet/ninja agent.