Add history.clearContext and Tool.isTerminal

Regenerates the RPC client for the new `session.history.clearContext` method
and surfaces `isTerminal` on the tool definition so an SDK or extension tool
whose purpose is to end the turn can halt the agent loop instead of faking it
with a rejected result.

Author: examon

nodejs/src/client.ts

@@ -1391,6 +1391,7 @@ export class CopilotClient {
                     overridesBuiltInTool: tool.overridesBuiltInTool,
                     skipPermission: tool.skipPermission,
                     defer: tool.defer,
+                    isTerminal: tool.isTerminal,
                 })),
                 canvases: config.canvases?.map((canvas) => canvas.declaration),
                 requestCanvasRenderer: config.requestCanvasRenderer,
@@ -1591,6 +1592,7 @@ export class CopilotClient {
                     overridesBuiltInTool: tool.overridesBuiltInTool,
                     skipPermission: tool.skipPermission,
                     defer: tool.defer,
+                    isTerminal: tool.isTerminal,
                 })),
                 canvases: config.canvases?.map((canvas) => canvas.declaration),
                 requestCanvasRenderer: config.requestCanvasRenderer,

nodejs/src/generated/rpc.ts

@@ -560,6 +560,17 @@ export interface Tool<TArgs = unknown> {
      * Optional; defaults to `"auto"`.
      */
     defer?: "auto" | "never";
+    /**
+     * When true, a successful call to this tool ends the agent turn: the runtime's
+     * tool phase halts instead of feeding the tool result back to the model for
+     * another round. A failed call (for example input validation) leaves the loop
+     * running so the model can read the error and retry.
+     *
+     * Use this for tools whose whole purpose is to terminate the turn, such as a
+     * context clear that replaces the conversation the model would otherwise
+     * continue from.
+     */
+    isTerminal?: boolean;
 }
 
 /**
@@ -575,6 +586,7 @@ export function defineTool<T = unknown>(
         overridesBuiltInTool?: boolean;
         skipPermission?: boolean;
         defer?: "auto" | "never";
+        isTerminal?: boolean;
     }
 ): Tool<T> {
     return { name, ...config };