1.4 KiB
@deepseek-ai/dsh-subagent-fork
The fork provider creates an in-process child seeded with the parent's completed conversation turns. It shares all run mechanics with spawn; the session seed is the only behavioral difference.
Seed boundary
The parent's current tool-calling turn is still open when a subagent starts: its log contains the assistant tool call but not the matching tool result or turn/end. Copying that raw log would give the child an invalid, unbalanced session.
Fork therefore computes the contiguous prefix ending at the last turn/end. The child sees all completed parent turns and none of the in-flight turn. If the parent has not completed a turn yet, the seed is empty and the child behaves like a fresh spawn.
The seed transfers conversation history only. The child still receives a fresh flat registration scope; it does not inherit the parent's tool restrictions or authority.
Start and capabilities
start(request) passes the completed-turn seed to startInProcessRun and awaits child publication. The shared driver owns cancellation, depth, customization, result reading, and disposal.
Fork advertises { outputSchema: true, depthLimit: true, toolFilter: true, persona: true }, identical to spawn.
Config
| Key | Meaning |
|---|---|
providerName |
Registry name on ctx.subagents (default fork). |