somnusovis/dsh-multi-workspace

dsh-multi-workspace

Multi-workspace sandbox for DeepSeek Harness (DSH).

Automatically grants file-write access to ALL registered workspaces — add a workspace in the UI, write to it immediately, no config needed.

Problem

By default, DSH file sandbox only allows writes to one workspace directory (the session cwd). Writing to other directories requires sandbox escalation.

Solution

This plugin reads the live workspace registry on every sandbox policy check and injects every registered workspace path as an additional writable root.

How it works

Two layers:

1. Wraps sandboxPolicy.resolve() to attach workspace paths
2. Wraps fs.writeText/editText with retry fallback on each workspace root

Limitations

• Shell commands stay confined to the session workspace. The multi-workspace widening applies to the fs tools only (layer 2 re-issues each denied write with the target workspace's root). The command sandbox seam (@deepseek-ai/dsh-sandbox-local, windows-acl / bwrap / seatbelt) reads only the single policy.workspaceRoot, so pwsh / bash writes outside the session workspace are still denied.
• The fs fallback silently retries under workspace-write without going through the approval flow. That is the plugin's intended "write immediately" behavior — make sure the registered workspaces are trusted.
• The wrapped resolve() must return a plain object (own mode / workspaceRoot / sessionId): executors spread the policy ({ ...policy }), and a prototype-based copy silently drops those keys, making the windows-acl runner fail with --workspace undefined (SANDBOX_UNAVAILABLE). test/smoke.mjs guards this regression.

Installation

dsh plugin --profile web add github:somnusovis/dsh-multi-workspace

# Or from npm (once published)
dsh plugin --profile web add dsh-multi-workspace

Restart DSH web service and refresh browser.

License

MIT