Dsh Same Mode Sandbox Noop

Key features

• A removable compatibility plugin for DeepSeek Harness / DSH 0.1.0-rc.6.
• Unit tests require only Node.js
• That release rejects a tool call when sandbox_permissions names a mode that is already covered by the call's effective sandbox 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.