diff --git a/apps/web/src/lib/bot/agent-runner.ts b/apps/web/src/lib/bot/agent-runner.ts
index 1562b2e51b..b4727ce42d 100644
--- a/apps/web/src/lib/bot/agent-runner.ts
+++ b/apps/web/src/lib/bot/agent-runner.ts
@@ -268,6 +268,8 @@ export async function runBotAgent(params: RunBotAgentParams): Promise<BotAgentCo
 
 If the user attached images or files (PDF, Markdown, text, CSV) to their message, those attachments are automatically forwarded to the Cloud Agent session — you do not need to describe or re-upload them. Reference them in the prompt if relevant (e.g. "implement the design shown in the attached screenshot" or "use the requirements in the attached document").
 
+For GitHub PR or review-thread work, Cloud Agent only sees the prompt you pass to this tool. Include the PR URL or number, relevant review-thread/comment details, and whether Cloud Agent should update the current PR branch or create a separate new PR.
+
 This tool returns an acknowledgement immediately. The final Cloud Agent result will be posted later in the same thread after the async session completes.`,
         inputSchema: spawnCloudAgentInputSchema,
         execute: async args => {
diff --git a/apps/web/src/lib/bot/tools/spawn-cloud-agent-session.test.ts b/apps/web/src/lib/bot/tools/spawn-cloud-agent-session.test.ts
index 8d20abb374..5fa20fa55d 100644
--- a/apps/web/src/lib/bot/tools/spawn-cloud-agent-session.test.ts
+++ b/apps/web/src/lib/bot/tools/spawn-cloud-agent-session.test.ts
@@ -68,7 +68,7 @@ let mockGetGitLabInstanceUrlForUser: jest.MockedFunction<typeof GetGitLabInstanc
 let mockBuildGitLabCloneUrl: jest.MockedFunction<typeof BuildGitLabCloneUrl>;
 let mockResolveBotSessionProfile: jest.MockedFunction<typeof ResolveBotSessionProfile>;
 
-describe('spawnCloudAgentSession attachment forwarding', () => {
+describe('spawnCloudAgentSession', () => {
   beforeAll(async () => {
     const client = await import('@/lib/cloud-agent-next/cloud-agent-client');
     const github = await import('@/lib/cloud-agent/github-integration-helpers');
@@ -136,4 +136,74 @@ describe('spawnCloudAgentSession attachment forwarding', () => {
     expect(prepareInput).toEqual(expect.objectContaining({ attachments }));
     expect(prepareInput).not.toHaveProperty('images');
   });
+
+  it('adds separate PR strategy guidance when preparing a requested GitHub session', async () => {
+    await spawnCloudAgentSession(
+      {
+        githubRepo: 'owner/repo',
+        githubPullRequestStrategy: 'separate_pull_request',
+        prompt: 'Update REVIEW.md',
+        mode: 'code',
+      },
+      'model',
+      platformIntegration,
+      'auth-token',
+      'ticket-user',
+      'request-3'
+    );
+
+    const prepareInput = mockPrepareSession.mock.calls[0]?.[0];
+    expect(prepareInput).toEqual(
+      expect.objectContaining({
+        prompt: expect.stringContaining('create a fresh branch'),
+      })
+    );
+    expect(prepareInput).toEqual(
+      expect.objectContaining({
+        prompt: expect.stringContaining("must not push to or modify the current PR's head branch"),
+      })
+    );
+  });
+
+  it('adds current PR branch guidance when preparing a current-branch GitHub session', async () => {
+    await spawnCloudAgentSession(
+      {
+        githubRepo: 'owner/repo',
+        githubPullRequestStrategy: 'current_pr_branch',
+        prompt: 'Update REVIEW.md',
+        mode: 'code',
+      },
+      'model',
+      platformIntegration,
+      'auth-token',
+      'ticket-user',
+      'request-4'
+    );
+
+    const prepareInput = mockPrepareSession.mock.calls[0]?.[0];
+    expect(prepareInput).toEqual(
+      expect.objectContaining({
+        prompt: expect.stringContaining('Work on the current PR head branch'),
+      })
+    );
+    expect(prepareInput).toEqual(
+      expect.objectContaining({
+        prompt: expect.not.stringContaining('create a fresh branch'),
+      })
+    );
+  });
+
+  it('leaves the prompt unchanged when separate PR strategy is not requested', async () => {
+    await spawnCloudAgentSession(
+      { githubRepo: 'owner/repo', prompt: 'Update REVIEW.md', mode: 'code' },
+      'model',
+      platformIntegration,
+      'auth-token',
+      'ticket-user',
+      'request-5'
+    );
+
+    const prepareInput = mockPrepareSession.mock.calls[0]?.[0];
+    expect(prepareInput).toEqual(expect.objectContaining({ prompt: 'Update REVIEW.md' }));
+  });
 });
diff --git a/apps/web/src/lib/bot/tools/spawn-cloud-agent-session.ts b/apps/web/src/lib/bot/tools/spawn-cloud-agent-session.ts
index d178c92011..092ed26883 100644
--- a/apps/web/src/lib/bot/tools/spawn-cloud-agent-session.ts
+++ b/apps/web/src/lib/bot/tools/spawn-cloud-agent-session.ts
@@ -31,6 +31,18 @@ import { captureException } from '@sentry/nextjs';
 import type { PlatformIntegration } from '@kilocode/db';
 import z from 'zod';
 
+const SEPARATE_PULL_REQUEST_STRATEGY_INSTRUCTION = `
+
+---
+**Required GitHub PR strategy:**
+The user explicitly requested a separate new PR. You must create a fresh branch from the original PR's base branch, open a separate new GitHub PR targeting that same base branch, and must not push to or modify the current PR's head branch.`;
+
+const CURRENT_PULL_REQUEST_BRANCH_STRATEGY_INSTRUCTION = `
+
+---
+**Required GitHub PR strategy:**
+Work on the current PR head branch for this task and do not open a separate GitHub PR.`;
+
 /**
  * Derive a per-request callback token so the dedicated callback HMAC secret
  * is never stored in session metadata (which is visible via getSession).
@@ -64,6 +76,12 @@ export const spawnCloudAgentInputSchema = z.object({
     .regex(/^[-a-zA-Z0-9_.]+\/[-a-zA-Z0-9_.]+$/)
     .describe('The GitHub repository in owner/repo format (e.g., "facebook/react")')
     .optional(),
+  githubPullRequestStrategy: z
+    .enum(['current_pr_branch', 'separate_pull_request'])
+    .describe(
+      'For GitHub PR or review-thread work only. Select "separate_pull_request" when the user asks for a new, fresh, separate, or different PR. Select "current_pr_branch" when the user wants the current PR updated or does not ask for a separate PR.'
+    )
+    .optional(),
   gitlabProject: z
     .string()
     .regex(/^[-a-zA-Z0-9_.]+(?:\/[-a-zA-Z0-9_.]+)+$/)
@@ -74,7 +92,7 @@ export const spawnCloudAgentInputSchema = z.object({
   prompt: z
     .string()
     .describe(
-      'The task description for the Cloud Agent. Be specific about what changes or analysis you want.'
+      'The task description for the Cloud Agent. Be specific about what changes or analysis you want. Cloud Agent does not see bot-only GitHub PR/review-thread context unless you include it here. For GitHub PR or review-thread work, include the PR URL or number, relevant review-thread/comment details, and the chosen current-PR or separate-PR strategy.'
     ),
   mode: z
     .enum(['code', 'ask'])
@@ -133,6 +151,12 @@ export default async function spawnCloudAgentSession(
 
   let prompt = args.prompt;
 
+  if (args.githubPullRequestStrategy === 'separate_pull_request' && args.githubRepo) {
+    prompt += SEPARATE_PULL_REQUEST_STRATEGY_INSTRUCTION;
+  } else if (args.githubPullRequestStrategy === 'current_pr_branch' && args.githubRepo) {
+    prompt += CURRENT_PULL_REQUEST_BRANCH_STRATEGY_INSTRUCTION;
+  }
+
   // Append PR/MR signature to the prompt if available
   if (options?.prSignature) {
     prompt += options.prSignature;