dsh-same-mode-sandbox-noop

A removable compatibility plugin for DeepSeek Harness / DSH 0.1.0-rc.6.

That release rejects a tool call when sandbox_permissions names a mode that
is already covered by the call's effective sandbox mode:

Error: sandbox escalation to "danger-full-access" is not strictly wider than
this call's current "danger-full-access" mode

The plugin wraps both ctx.tools.execute() and the rc.6 Agent Loop scheduler's
preparation entry point before DSH snapshots and freezes tool arguments. For
bash, pwsh, write, and edit, it removes the paired
sandbox_permissions and justification fields when the requested mode is
equal to or narrower than the calling session's effective mode. The original
runtime then executes the call under its standing policy. For example, a
workspace-write request in a danger-full-access session is not an
escalation, so the redundant pair is removed.

Genuinely wider requests, unknown modes, malformed argument pairs, unrelated
tools, and calls without escalation fields pass to DSH unchanged. For a known
non-escalating request, an empty justification is removed with the redundant
permission fields before DSH validates it; for a genuinely wider request, the
same empty justification remains subject to DSH's original validation.
Disposal restores the original runtime methods.

This is an out-of-tree compatibility workaround. Prefer a DSH release that
handles non-escalating requests in the shared sandbox escalation layer when one
is available.

Install into a DSH profile

Until this package is published to npm, clone it and add the local directory:

git clone https://github.com/zhangzujian/dsh-same-mode-sandbox-noop.git
cd dsh-same-mode-sandbox-noop
npx @deepseek-ai/dsh@0.1.0-rc.6 plugin --profile web add "$PWD"

The package declares a DSH bundle, so dsh plugin adds its patch layer to the
profile automatically. Restart dsh web after installation.

To remove it:

npx @deepseek-ai/dsh@0.1.0-rc.6 plugin --profile web remove @zhangzujian/dsh-same-mode-sandbox-noop

For a one-off local overlay without profile installation, insert the plugin by
file URL in a patch loaded after the base bundle:

- insert:
    - id: same-mode-sandbox-noop
      name: file:///absolute/path/to/dsh-same-mode-sandbox-noop/index.mjs

Test

Unit tests require only Node.js:

npm test

Integration tests run against an installed DSH tree:

DSH_INSTALL_DIR=/path/to/npx/cache/package npm run test:integration

DSH_INSTALL_DIR is the directory containing node_modules/@deepseek-ai.

License

MIT