Tianyi Cui
6967c584d1
# Conflicts: # packages/core/scope/README.md # packages/session-persistence/session-persistence-jsonl/README.md # packages/session-persistence/session-persistence-sqlite/README.md # packages/subagent/subagent-acp/README.md # packages/subagent/subagent-fork/README.md # packages/subagent/subagent-inprocess/README.md # packages/subagent/subagent/README.md # packages/subagent/tool-subagent/README.md # packages/support/invariants/README.md # packages/support/subagent-mock/README.md # packages/workflow/workflow-workerthread/README.md # packages/workflow/workflow/README.md
30 lines
1.9 KiB
Markdown
30 lines
1.9 KiB
Markdown
# @deepseek-ai/dsh-subagent-fork
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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.
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## Seed boundary
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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.
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Fork therefore uses `completedTurnPrefix(parent.session.events)`: 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.
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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.
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## Start and capabilities
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`start(request)` passes the completed-turn seed to [`startInProcessRun`](../subagent-inprocess/README.md) and awaits child publication. The shared driver owns cancellation, depth, customization, result reading, and disposal.
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Fork advertises `{ outputSchema: true, depthLimit: true, toolFilter: true, persona: true }`, identical to spawn.
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## Config
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| Key | Meaning |
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| `providerName` | Registry name on `ctx.subagents` (default `fork`). |
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See [`dsh-subagent-spawn`](../subagent-spawn/README.md) for the run lifecycle, model inheritance, and depth tracking — all shared.
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## Known Limitations and Deferred Work
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- **Runs expose no `sendMessage`/`resume`** — the optional runtime capabilities are absent on in-process runs.
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- **The seed is a one-time snapshot** — the child sees the parent's completed turns as of the fork and nothing the parent logs afterwards; there is no live context sharing.
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