dsh-delegate-router

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Automatic Flash/Pro routing for DeepSeek Harness subagent calls.

Your main conversation keeps running on a strong model (e.g. V4 Pro). When the agent delegates a task to a subagent, this plugin classifies the task and sends light tasks to a cheap model (e.g. V4 Flash) while heavy tasks stay on the strong model — deterministically, without relying on the model's cooperation.

• Auto routing — light tasks (search / summarize / list …) run on Flash; heavy tasks (refactor / implement / debug …) stay on Pro.
• Manual overrides — per-call provider/model parameters are added to the subagent / subagent_fork tools, so you can force a model on any call.
• /delegate command — per-session mode: /delegate auto | off | flash-all.
• Budget cap — (config ready, token accounting in a later release) once the session exceeds budgetCapTokens, new subagents downgrade to Flash.
• Decision ledger — every routed delegation is recorded (task, chosen route, trigger) in a storage domain; a savings panel is planned.

How it works

The plugin wraps the official subagent / subagent_fork tools on each agent's scoped context (same seam the proven dsh-reasoning-settings uses), classifies the task inside the wrapper, and rewrites the child's first request in the agent/request waterfall — the official lifecycle stays untouched. Verified end-to-end: a "search" delegation ran the child session on deepseek-v4-flash while the parent session stayed on deepseek-v4-pro.

Install

dsh plugin --profile web add dsh-delegate-router

Configure

Set the Flash/Pro routes either in the profile patch config or via environment variables (both are optional; the router only acts when the relevant route is configured):

setx dsh_delegate_router_FLASH_PROVIDER "<provider>"
setx dsh_delegate_router_FLASH_MODEL   "<flash-model-id>"
setx dsh_delegate_router_PRO_PROVIDER  "<provider>"
setx dsh_delegate_router_PRO_MODEL     "<pro-model-id>"

Restart DSH afterwards. Modes: auto (default), off, flash-all; switch at runtime with /delegate <mode>.

Development

npm install
npm run smoke
node scripts/e2e-delegate.mjs   # browser E2E against a test instance

License

MIT

Acknowledgements

Built for the DeepSeek Harness plugin ecosystem — thanks to the community on LINUX DO for feedback and testing.