feat: rename update-pr merge option and scope permissions

Agent-Logs-Url: https://github.com/github/gh-aw/sessions/fad66084-394b-4a19-b77a-f699f706efe7

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

Author: Copilot

.github/workflows/changeset.lock.yml

@@ -48,11 +48,11 @@ const SAMPLE_VALIDATION_CONFIG = {
   },
   update_pull_request: {
     defaultMax: 1,
-    customValidation: "requiresOneOf:title,body,merge_base",
+    customValidation: "requiresOneOf:title,body,update_branch",
     fields: {
       title: { type: "string", sanitize: true, maxLength: 256 },
       body: { type: "string", sanitize: true, maxLength: 65000 },
-      merge_base: { type: "boolean" },
+      update_branch: { type: "boolean" },
       pull_request_number: { issueOrPRNumber: true },
     },
   },
@@ -410,19 +410,19 @@ describe("safe_output_type_validator", () => {
       expect(result.error).toContain("pull_number");
     });
 
-    it("should fail for update_pull_request when merge_base is false and no title/body is provided", async () => {
+    it("should fail for update_pull_request when update_branch is false and no title/body is provided", async () => {
       const { validateItem } = await import("./safe_output_type_validator.cjs");
 
-      const result = validateItem({ type: "update_pull_request", merge_base: false }, "update_pull_request", 1);
+      const result = validateItem({ type: "update_pull_request", update_branch: false }, "update_pull_request", 1);
 
       expect(result.isValid).toBe(false);
       expect(result.error).toContain("requires at least one of");
     });
 
-    it("should pass for update_pull_request when merge_base is true", async () => {
+    it("should pass for update_pull_request when update_branch is true", async () => {
       const { validateItem } = await import("./safe_output_type_validator.cjs");
 
-      const result = validateItem({ type: "update_pull_request", merge_base: true }, "update_pull_request", 1);
+      const result = validateItem({ type: "update_pull_request", update_branch: true }, "update_pull_request", 1);
 
       expect(result.isValid).toBe(true);
     });

.github/workflows/smoke-claude.lock.yml

@@ -783,7 +783,7 @@
           "enum": ["replace", "append", "prepend"],
           "description": "How to update the PR body: 'replace' (default - completely overwrite), 'append' (add to end with separator), or 'prepend' (add to start with separator). Title is always replaced."
         },
-        "merge_base": {
+        "update_branch": {
           "type": "boolean",
           "description": "When true, update the pull request branch with the latest base branch changes before applying other updates. Defaults to false."
         },

actions/setup/js/safe_output_type_validator.test.cjs

@@ -235,8 +235,8 @@ interface UpdatePullRequestItem extends BaseSafeOutputItem {
   body?: string;
   /** Update operation for body: 'replace' (default), 'append', or 'prepend' */
   operation?: "replace" | "append" | "prepend";
-  /** When true, merges the latest base branch changes into the pull request branch before other updates */
-  merge_base?: boolean;
+  /** When true, updates the pull request branch with the latest base branch changes before other updates */
+  update_branch?: boolean;
   /** Optional pull request number for target "*" */
   pull_request_number?: number | string;
   /** Whether the PR should be a draft (true) or ready for review (false) */