Handoff - Harbor

harbor trial handoff copies a completed trial’s native session to your local agent CLI and resumes it in the current directory. Use it to continue the conversation or ask the agent about its work.

# Local trial directory
harbor trial handoff "jobs/<job>/<trial>"

# Harbor Hub trial ID
harbor trial handoff 594025f3-7d65-4655-8576-4bee95002eae

Trial handoff to Claude Code

For a Hub trial ID, Harbor downloads the trial first. For claude-code, handoff copies the session to the local Claude Code store and runs claude --resume <session-id>.

Requirements

The agent supports capabilities.handoff. Currently, only claude-code does.
The agent CLI is installed locally. For claude-code, claude must be on PATH.
The trial contains one session. Multi-session trials are not supported.

What is restored

Handoff restores the native session history, not files from the trial sandbox. See loading trajectories to seed a new Harbor run instead.