[ide-mode] Add support for in-IDE diff handling in the CLI (#5603)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

packages/core/src/ide/ideContext.ts

@@ -36,10 +36,69 @@ export type IdeContext = z.infer<typeof IdeContextSchema>;
  * Zod schema for validating the 'ide/contextUpdate' notification from the IDE.
  */
 export const IdeContextNotificationSchema = z.object({
+  jsonrpc: z.literal('2.0'),
   method: z.literal('ide/contextUpdate'),
   params: IdeContextSchema,
 });
 
+export const IdeDiffAcceptedNotificationSchema = z.object({
+  jsonrpc: z.literal('2.0'),
+  method: z.literal('ide/diffAccepted'),
+  params: z.object({
+    filePath: z.string(),
+    content: z.string(),
+  }),
+});
+
+export const IdeDiffClosedNotificationSchema = z.object({
+  jsonrpc: z.literal('2.0'),
+  method: z.literal('ide/diffClosed'),
+  params: z.object({
+    filePath: z.string(),
+    content: z.string().optional(),
+  }),
+});
+
+export const CloseDiffResponseSchema = z
+  .object({
+    content: z
+      .array(
+        z.object({
+          text: z.string(),
+          type: z.literal('text'),
+        }),
+      )
+      .min(1),
+  })
+  .transform((val, ctx) => {
+    try {
+      const parsed = JSON.parse(val.content[0].text);
+      const innerSchema = z.object({ content: z.string().optional() });
+      const validationResult = innerSchema.safeParse(parsed);
+      if (!validationResult.success) {
+        validationResult.error.issues.forEach((issue) => ctx.addIssue(issue));
+        return z.NEVER;
+      }
+      return validationResult.data;
+    } catch (_) {
+      ctx.addIssue({
+        code: z.ZodIssueCode.custom,
+        message: 'Invalid JSON in text content',
+      });
+      return z.NEVER;
+    }
+  });
+
+export type DiffUpdateResult =
+  | {
+      status: 'accepted';
+      content?: string;
+    }
+  | {
+      status: 'rejected';
+      content: undefined;
+    };
+
 type IdeContextSubscriber = (ideContext: IdeContext | undefined) => void;
 
 /**