deepseek-harness/packages/session-fork

session-fork/ — session fork capability family

The session fork capability: a small optional service that validates a live session is at a turn boundary, snapshots its event log as a seed, and creates forked child sessions through the existing dsh-session seed primitive. All product packages.

Package	Role	ctx key
session-fork/	Session fork service: reusable seed snapshot + forked live-session creation	ctx.sessionFork

The interface and implementation live together at session-fork/session-fork/ because v1 has no swappable backend: all durable behavior is delegated to the existing session store and persistence backends. The decision is recorded in the session fork service RFC.