Contract: pass approval option warnings, omit threadId on host pushes

gateway/src/contract.ts

@@ -21,8 +21,8 @@ export interface PendingRequest {
   /** What the agent wants to do, such as the command line. Null when the server gave none. */
   prompt: string | null;
   reason: string | null;
-  /** Approval choices, in the server's order. Empty for questions. */
-  options: Array<{ decision: ApprovalDecision; label: string }>;
+  /** Approval choices, in the server's order. Empty for questions. `warning` flags a risky choice. */
+  options: Array<{ decision: ApprovalDecision; label: string; warning?: string }>;
   /** Questions for the user. Empty for approvals. */
   questions: Array<{
     id: string;
@@ -126,7 +126,8 @@ export interface ErrorResponse {
 /** Custom keys on every push notification, beside `aps`. */
 export interface PushPayload {
   hostId: string;
-  threadId: string;
+  /** Absent on `host` pushes, which are about a host rather than a thread. */
+  threadId?: string;
   requestId?: string;
 }