chore: establish YCode replication baseline and TODO

src/shared/workspaces.ts

@@ -0,0 +1,25 @@
+export interface WorkspaceRecord {
+  id: string
+  name: string
+  root: string
+  createdAt: number
+}
+export interface WorkspaceRegistryView {
+  workspaces: WorkspaceRecord[]
+  selectedWorkspaceId: string | null
+}
+/**
+ * Reasoning effort for one session. `off` disables thinking entirely; the rest mirror OMP's
+ * `--thinking` levels. OMP additionally accepts `auto` and `minimal`, which this host does not
+ * currently surface in the selector.
+ */
+export type ThinkingLevel = 'off' | 'low' | 'medium' | 'high' | 'xhigh' | 'max'
+
+export interface SessionContext {
+  workspaceId?: string
+  cwd?: string
+  modelId?: string
+  expertId?: string | null
+  agentMode?: import('./conversation').AgentMode
+  thinkingLevel?: ThinkingLevel
+}