Multi-agent orchestration for DeepSeek Harness

Key features

• agent-bus is built for teams that have outgrown "one agent and a lot of copy-paste"
• Turn a workspace of isolated agents into a working team.
• A planner has no way to hand a coder the brief.
• You want to protect the caller's context — send an isolated explorer off to research, and keep the parent's window clean.
• A long-running multi-step build — plan a release, split it into tasks the agents actually execute, and let the DAG dispatch each step only when its dependency is accepted.