feat: add interactive VT and workspace command plane

docs/ROADMAP.md

@@ -12,6 +12,8 @@
 - Prove Buzz SDK message, attachment, cursor, reconnect, and duplicate-delivery
   behavior against a disposable local relay.
 - Decide terminal core, UI stack, IPC transport, and schema evolution policy.
+- Define the Lumbridge Harness process boundary, trace-consent model, provider-
+  neutral endpoint profile, and upstream-fork maintenance policy.
 
 Exit: recorded decisions with working spikes and measured results.
 
@@ -21,6 +23,8 @@ Exit: recorded decisions with working spikes and measured results.
 - Saved SSH/Tailscale hosts and durable remote panes through a per-user remote
   runtime; reconnect from a second Lumbridge installation.
 - Session restore, crash recovery, command palette, keybindings, notifications.
+- Per-pane Terminal, Browser, Tools, Context, Goal, and Review surface tabs, plus
+  an inert decision shelf that can render typed suggestions without executing.
 - Repository/worktree creation and basic Git status/diff.
 - Optional Buzz collaboration pane, workspace channel binding, and confirmed
   redacted pane-image sharing.
@@ -34,6 +38,9 @@ Exit: Lumbridge is worth using as a terminal multiplexer without AI features.
 - ACP client with capability negotiation and permission rendering.
 - Codex, Claude Code, DeepSeek Harness, Pi, and Hermes adapters.
 - Agent status, unread/needs-input state, resume, and transcript navigation.
+- Separately versioned Lumbridge Harness with local/self-hosted OpenAI-compatible
+  model support, prompt refinement, trace projections, and capability-gated
+  workspace plans.
 
 Exit: daily multi-agent work is reliable and observable.