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dsh-multica-runtime

forrestchang/dsh-multica-runtime

Run the dsh runtime on Multica.

460TypeScriptSource

Install

Add dsh-multica-runtime to DeepSeek Harness

via GitHub · GitHub source

Installing from GitHub runs the project's build script, which pnpm blocks until you allowlist it — run the command once and pnpm prints the exact key to add under `allowBuilds` in ~/.dsh/profiles/web/pnpm-workspace.yaml.

What happened when we ran it

Installed cleanly when we ran it

Every command here is run in a throwaway container against a clean profile, and the result is whatever the harness recorded — not a guess from the source. Last run 3d ago.

Due diligence

Before you install dsh-multica-runtime

  • Source of record: forrestchang/dsh-multica-runtime — present in the community registry that DSH's own plugin market installs from.
  • No licence file detected. Code without a licence is all-rights-reserved by default.
  • Detected: terminal surface. Read the source before granting these.
  • A listing here is not a security review. Plugins run with your agent's permissions.

The AI take

What it is — Private runtime bridge between Multica and DeepSeek Harness.

Who it is for — Developers needing DSH runtime integration in the Multica environment. For developers using standard DSH environments, this bridge serves no purpose.

Watch out — Sandbox test passed: installed in a new profile and registered with harness. The plugin executes shell commands.

The verdict — I would install it because it requires no changes to DeepSeek Harness.

Generated by grok-4.6, and a starting point rather than a verdict. Where it says a plugin installs or does not, that is from a real run in a clean profile — everything else is read off the repository. Trust the source over this.

What dsh-multica-runtime does

Abstract diagram of a runtime bridge sending events through a protocol channel into an isolated terminal.

dsh-multica-runtime is a DeepSeek Harness plugin that runs the DeepSeek Harness runtime through Multica. It provides a private, out-of-tree bridge over a versioned JSONL protocol on stdio, composing over @deepseek-ai/dsh-base rather than changing DeepSeek Harness. The runtime exposes --probe, --list-models and --stdio commands, and is discovered by Multica when --probe reports protocol version 1.

The plugin reads model and thinking-level information from DSH, then streams committed text, reasoning, tool, result and token-usage events back through the protocol. Multica supplies per-runtime or per-agent session roots; the bridge supports durable session resume, cooperative cancellation, and translates canonical MCP configuration into DSH stdio or streamable-HTTP clients. MULTICA_DSH_PATH can point to a non-standard DSH launcher. DEEPSEEK_API_KEY is read at runtime by the credential provider and must not be stored in the repository.

This is intended for agents that need to run DSH inside Multica without modifying the public runtime. It is a poor choice where interactive approvals are required: approvals are headless and there is no interactive question surface. The terminal surface reaches DSH’s credential-scrubbed shell; only Multica’s server-minted mat_ task token is forwarded so in-task multica commands retain task attribution.

dsh-multica-runtime documentation

Configuring dsh-multica-runtime

DeepSeek Harness loads the built plugin into the multica profile. The runtime can use a non-standard DeepSeek Harness launcher when MULTICA_DSH_PATH is set to an absolute path:

MULTICA_DSH_PATH=/absolute/path/to/dsh

The plugin reads DEEPSEEK_API_KEY through DeepSeek Harness’s credential provider at process runtime. Do not store this key in the repository. Multica supplies the per-runtime or per-agent session roots. Its canonical MCP configuration is translated into DSH clients using stdio or streamable HTTP.

Commands supported by dsh-multica-runtime

Run these commands with the multica profile:

Command Purpose
dsh --profile multica --probe Returns protocol version 1 for Multica discovery.
dsh --profile multica --list-models Lists models and thinking levels discovered from DSH.
dsh --profile multica --stdio Runs the versioned JSONL runtime protocol over standard input and output.

DeepSeek Harness must be installed in a location that the plugin can launch. For local development, the README validates the bundle with pnpm install, pnpm check and pnpm build; the checkout is currently validated against @deepseek-ai/dsh@0.1.0-rc.6 and its matching @deepseek-ai/dsh-* package family.

Runtime behaviour

The stdio channel is protocol-only: diagnostics go to stderr. The bridge emits committed text, reasoning, tool, result and token-usage events. It supports cooperative cancellation and durable session resume. Headless one-shot approvals are supported, but no interactive question surface is provided. DSH telemetry is disabled by the bundle patch.

Terminal and credential handling

The runtime can invoke DSH’s credential-scrubbed shell, which is the plugin’s terminal surface. It narrowly forwards Multica’s server-minted mat_ task token so in-task multica commands retain task attribution. Model-provider credentials are not forwarded through that mechanism. DEEPSEEK_API_KEY remains a process-runtime credential rather than repository data.

Written from the project's own documentation and kept in sync with it. Where the two disagree, the source is authoritative — read the README on GitHub

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