Exercise probe, creation, terminals, file observation, Git, scripts, and agent edits through the Desktop Docker runtime while proving host decoys remain untouched.
Selected-runtime creation has a longer request budget because materialization and setup can legitimately exceed the legacy RPC ceiling; legacy creation keeps its existing timeout. Materializing records remain durable but private until final placement is published.
Scope Docker resources to the daemon owner and validate both container and volume before every lifecycle operation and creation race. Explicit Local and Worktree selection remains behaviorally unchanged, including reusable Local script terminals and the shared common-Git watcher.
Real-provider manual QA uses ignored checkout-local configuration and is intentionally not committed.
Keep browsing, streaming, editing, downloads, and live file observation inside the selected workspace runtime. Helper processes own cancellation and teardown so remote workspaces never fall back to host paths.
Establish the pipe-mode vertical slice before migrating terminals, files, Git, and providers. Runtime selection is immutable per workspace, and external runtimes remain unavailable to path-based daemon surfaces until those capabilities move behind the boundary.