diff --git a/src/core/Cline.ts b/src/core/Cline.ts
index 0c0bd37050..652c0ebf33 100644
--- a/src/core/Cline.ts
+++ b/src/core/Cline.ts
@@ -1044,6 +1044,12 @@ export class Cline {
 							const modeName = getModeBySlug(mode, customModes)?.name ?? mode
 							return `[${block.name} in ${modeName} mode: '${message}']`
 						}
+						case "open_cursor": {
+							const prompt = block.params.prompt ?? "(no prompt)"
+							const mode = block.params.mode ?? "(no mode)"
+							const monitor = block.params.monitor ?? "(no monitor)"
+							return `[${block.name} with prompt: '${prompt}' in ${mode} mode, monitor: ${monitor}]`
+						}
 					}
 				}
 
@@ -2472,6 +2478,52 @@ export class Cline {
 						}
 					}
 
+					case "open_cursor": {
+						const mode: string | undefined = block.params.mode
+						const prompt: string | undefined = block.params.prompt
+						try {
+							if (block.partial) {
+								const partialMessage = JSON.stringify({
+									tool: "openCursor",
+									mode: removeClosingTag("mode", mode),
+									prompt: removeClosingTag("prompt", prompt),
+								})
+								await this.ask("tool", partialMessage, block.partial).catch(() => {})
+								break
+							} else {
+								if (!mode) {
+									this.consecutiveMistakeCount++
+									pushToolResult(await this.sayAndCreateMissingParamError("open_cursor", "mode"))
+									break
+								}
+								if (!prompt) {
+									this.consecutiveMistakeCount++
+									pushToolResult(await this.sayAndCreateMissingParamError("open_cursor", "prompt"))
+									break
+								}
+								this.consecutiveMistakeCount = 0
+
+								const provider = this.providerRef.deref()
+								if (provider) {
+									await provider.openCursorInstance(prompt, mode)
+									pushToolResult(
+										`Successfully opened new Cursor instance in ${mode} mode with prompt: ${prompt}`,
+									)
+								} else {
+									pushToolResult(
+										formatResponse.toolError(
+											"Failed to open Cursor instance: provider not available",
+										),
+									)
+								}
+								break
+							}
+						} catch (error) {
+							await handleError("opening cursor", error)
+							break
+						}
+					}
+
 					case "attempt_completion": {
 						/*
 						this.consecutiveMistakeCount = 0
diff --git a/src/core/assistant-message/index.ts b/src/core/assistant-message/index.ts
index f1c49f85ab..7b7e8bfb23 100644
--- a/src/core/assistant-message/index.ts
+++ b/src/core/assistant-message/index.ts
@@ -25,6 +25,7 @@ export const toolUseNames = [
 	"attempt_completion",
 	"switch_mode",
 	"new_task",
+	"open_cursor",
 ] as const
 
 // Converts array of tool call names into a union type ("execute_command" | "read_file" | ...)
@@ -56,6 +57,8 @@ export const toolParamNames = [
 	"operations",
 	"mode",
 	"message",
+	"prompt",
+	"monitor",
 ] as const
 
 export type ToolParamName = (typeof toolParamNames)[number]
@@ -138,3 +141,8 @@ export interface NewTaskToolUse extends ToolUse {
 	name: "new_task"
 	params: Partial<Pick<Record<ToolParamName, string>, "mode" | "message">>
 }
+
+export interface OpenCursorToolUse extends ToolUse {
+	name: "open_cursor"
+	params: Partial<Pick<Record<ToolParamName, string>, "prompt" | "mode" | "monitor">>
+}
diff --git a/src/core/prompts/tools/index.ts b/src/core/prompts/tools/index.ts
index c4bdfc98c3..f36bf94d3b 100644
--- a/src/core/prompts/tools/index.ts
+++ b/src/core/prompts/tools/index.ts
@@ -13,6 +13,7 @@ import { getUseMcpToolDescription } from "./use-mcp-tool"
 import { getAccessMcpResourceDescription } from "./access-mcp-resource"
 import { getSwitchModeDescription } from "./switch-mode"
 import { getNewTaskDescription } from "./new-task"
+import { getOpenCursorDescription } from "./open_cursor"
 import { DiffStrategy } from "../../diff/DiffStrategy"
 import { McpHub } from "../../../services/mcp/McpHub"
 import { Mode, ModeConfig, getModeConfig, isToolAllowedForMode, getGroupName } from "../../../shared/modes"
@@ -36,6 +37,7 @@ const toolDescriptionMap: Record<string, (args: ToolArgs) => string | undefined>
 	new_task: (args) => getNewTaskDescription(args),
 	insert_content: (args) => getInsertContentDescription(args),
 	search_and_replace: (args) => getSearchAndReplaceDescription(args),
+	open_cursor: (args) => getOpenCursorDescription(args),
 	apply_diff: (args) =>
 		args.diffStrategy ? args.diffStrategy.getToolDescription({ cwd: args.cwd, toolOptions: args.toolOptions }) : "",
 }
diff --git a/src/core/prompts/tools/open_cursor.ts b/src/core/prompts/tools/open_cursor.ts
new file mode 100644
index 0000000000..6c78c20cdf
--- /dev/null
+++ b/src/core/prompts/tools/open_cursor.ts
@@ -0,0 +1,25 @@
+import { ToolArgs } from "./types"
+
+export function getOpenCursorDescription(args: ToolArgs): string {
+	return `## open_cursor
+
+Description: Request to open a new instance of Cursor with a specified prompt and mode. This tool allows Roo Code to start and monitor a new, separate task within a new Cursor instance.
+
+Parameters:
+- prompt: (required) The initial prompt or instructions to send to the new Cursor instance.
+- mode: (optional) The mode to start the new instance in (e.g., "code", "ask", "architect"). If not provided, will use the current mode.
+- monitor: (optional) Whether to monitor the task's progress. Defaults to true.
+
+Usage:
+<open_cursor>
+<prompt>Your initial prompt here</prompt>
+<mode>Mode to start in (optional)</mode>
+</open_cursor>
+
+Example:
+<open_cursor>
+<prompt>Create a new React component</prompt>
+<mode>code</mode>
+</open_cursor>
+`
+}
diff --git a/src/core/webview/ClineProvider.ts b/src/core/webview/ClineProvider.ts
index ffb984813b..7a61795b8c 100644
--- a/src/core/webview/ClineProvider.ts
+++ b/src/core/webview/ClineProvider.ts
@@ -1413,6 +1413,28 @@ export class ClineProvider implements vscode.WebviewViewProvider {
 		await this.postStateToWebview()
 	}
 
+	public async openCursorInstance(prompt: string, mode: string) {
+		// Construct command to open new Cursor instance
+		const cursorCommand = {
+			command: "workbench.action.newWindow",
+			args: [
+				{
+					mode,
+					prompt,
+				},
+			],
+		}
+
+		// Execute command to open new window
+		const result = await vscode.commands.executeCommand(cursorCommand.command, ...cursorCommand.args)
+		console.log("result", result)
+		const windows = vscode.window.state.active
+		console.log("windows", windows)
+		await vscode.commands.executeCommand("workbench.view.extension.roo-cline-ActivityBar")
+		await this.postMessageToWebview({ type: "action", action: "openCursorInstance" })
+		await this.postStateToWebview()
+	}
+
 	private async updateApiConfiguration(apiConfiguration: ApiConfiguration) {
 		// Update mode's default config
 		const { mode } = await this.getState()
diff --git a/src/shared/ExtensionMessage.ts b/src/shared/ExtensionMessage.ts
index a226beb802..f5c18ac82b 100644
--- a/src/shared/ExtensionMessage.ts
+++ b/src/shared/ExtensionMessage.ts
@@ -50,6 +50,7 @@ export interface ExtensionMessage {
 		| "historyButtonClicked"
 		| "promptsButtonClicked"
 		| "didBecomeVisible"
+		| "openCursorInstance"
 	invoke?: "sendMessage" | "primaryButtonClick" | "secondaryButtonClick" | "setChatBoxMessage"
 	state?: ExtensionState
 	images?: string[]
@@ -161,7 +162,7 @@ export type ClineSay =
 	| "mcp_server_response"
 	| "new_task_started"
 	| "new_task"
-
+	| "openCursorInstance"
 export interface ClineSayTool {
 	tool:
 		| "editedExistingFile"
@@ -174,6 +175,7 @@ export interface ClineSayTool {
 		| "searchFiles"
 		| "switchMode"
 		| "newTask"
+		| "openCursor"
 	path?: string
 	diff?: string
 	content?: string
diff --git a/src/shared/WebviewMessage.ts b/src/shared/WebviewMessage.ts
index 357a237caf..16757d953d 100644
--- a/src/shared/WebviewMessage.ts
+++ b/src/shared/WebviewMessage.ts
@@ -81,6 +81,7 @@ export interface WebviewMessage {
 		| "deleteCustomMode"
 		| "setopenAiCustomModelInfo"
 		| "openCustomModesSettings"
+		| "openCursorInstance"
 	text?: string
 	disabled?: boolean
 	askResponse?: ClineAskResponse
diff --git a/src/shared/tool-groups.ts b/src/shared/tool-groups.ts
index 055fb11660..9ef1837a13 100644
--- a/src/shared/tool-groups.ts
+++ b/src/shared/tool-groups.ts
@@ -17,6 +17,7 @@ export const TOOL_DISPLAY_NAMES = {
 	attempt_completion: "complete tasks",
 	switch_mode: "switch modes",
 	new_task: "create new task",
+	open_cursor: "open cursor instance",
 } as const
 
 // Define available tool groups
@@ -27,6 +28,7 @@ export const TOOL_GROUPS: Record<string, ToolGroupValues> = {
 	command: ["execute_command"],
 	mcp: ["use_mcp_tool", "access_mcp_resource"],
 	modes: ["switch_mode", "new_task"],
+	open_cursor: ["open_cursor"],
 }
 
 export type ToolGroup = keyof typeof TOOL_GROUPS
@@ -37,6 +39,7 @@ export const ALWAYS_AVAILABLE_TOOLS = [
 	"attempt_completion",
 	"switch_mode",
 	"new_task",
+	"open_cursor",
 ] as const
 
 // Tool name types for type safety
diff --git a/webview-ui/src/components/chat/ChatRow.tsx b/webview-ui/src/components/chat/ChatRow.tsx
index cb4649a915..e6fac06fd1 100644
--- a/webview-ui/src/components/chat/ChatRow.tsx
+++ b/webview-ui/src/components/chat/ChatRow.tsx
@@ -489,6 +489,15 @@ export const ChatRowContent = ({
 						</div>
 					</>
 				)
+			case "openCursor":
+				return (
+					<>
+						<div style={headerStyle}>
+							{toolIcon("open-cursor")}
+							<span style={{ fontWeight: "bold" }}>Roo wants to open a new Cursor instance:</span>
+						</div>
+					</>
+				)
 			default:
 				return null
 		}
diff --git a/webview-ui/src/components/chat/ChatView.tsx b/webview-ui/src/components/chat/ChatView.tsx
index 3f58c7aefd..e67d098dc3 100644
--- a/webview-ui/src/components/chat/ChatView.tsx
+++ b/webview-ui/src/components/chat/ChatView.tsx
@@ -348,6 +348,10 @@ const ChatView = ({ isHidden, showAnnouncement, hideAnnouncement, showHistoryVie
 		vscode.postMessage({ type: "clearTask" })
 	}, [])
 
+	const openCursorInstance = useCallback(() => {
+		vscode.postMessage({ type: "openCursorInstance" })
+	}, [])
+
 	/*
 	This logic depends on the useEffect[messages] above to set clineAsk, after which buttons are shown and we then send an askResponse to the extension.
 	*/