diff --git a/packages/types/src/mode.ts b/packages/types/src/mode.ts
index f981ba7bf9..3c30f555a7 100644
--- a/packages/types/src/mode.ts
+++ b/packages/types/src/mode.ts
@@ -102,6 +102,9 @@ export const modeConfigSchema = z.object({
 	customInstructions: z.string().optional(),
 	groups: groupEntryArraySchema,
 	source: z.enum(["global", "project"]).optional(),
+	// Marketplace origin metadata (optional)
+	installedFromMarketplace: z.boolean().optional(),
+	marketplaceItemId: z.string().optional(),
 })
 
 export type ModeConfig = z.infer<typeof modeConfigSchema>
diff --git a/src/core/config/CustomModesManager.ts b/src/core/config/CustomModesManager.ts
index a243a9236b..90fef93801 100644
--- a/src/core/config/CustomModesManager.ts
+++ b/src/core/config/CustomModesManager.ts
@@ -552,6 +552,58 @@ export class CustomModesManager {
 			vscode.window.showErrorMessage(t("common:customModes.errors.deleteFailed", { error: errorMessage }))
 		}
 	}
+	/**
+	 * Deletes a custom mode only from the specified source (project or global)
+	 * without affecting the other scope. Also handles rules folder cleanup.
+	 * @param slug - The mode slug
+	 * @param source - "project" or "global"
+	 * @param fromMarketplace - Whether this deletion was initiated by marketplace flows
+	 */
+	public async deleteCustomModeForSource(
+		slug: string,
+		source: "project" | "global",
+		fromMarketplace = false,
+	): Promise<void> {
+		try {
+			await this.queueWrite(async () => {
+				const settingsPath = await this.getCustomModesFilePath()
+				const roomodesPath = await this.getWorkspaceRoomodes()
+
+				let targetPath: string
+				let modeToDelete: ModeConfig | undefined
+
+				if (source === "project") {
+					if (!roomodesPath) {
+						throw new Error(t("common:customModes.errors.noWorkspaceForProject"))
+					}
+					targetPath = roomodesPath
+					const roomodesModes = await this.loadModesFromFile(roomodesPath)
+					modeToDelete = roomodesModes.find((m) => m.slug === slug)
+				} else {
+					targetPath = settingsPath
+					const settingsModes = await this.loadModesFromFile(settingsPath)
+					modeToDelete = settingsModes.find((m) => m.slug === slug)
+				}
+
+				if (!modeToDelete) {
+					throw new Error(t("common:customModes.errors.modeNotFound"))
+				}
+
+				// Delete only from the selected source file
+				await this.updateModesInFile(targetPath, (modes) => modes.filter((m) => m.slug !== slug))
+
+				// Delete associated rules folder using the located mode (preserves correct scope)
+				await this.deleteRulesFolder(slug, modeToDelete, fromMarketplace)
+
+				// Refresh state and clear caches
+				this.clearCache()
+				await this.refreshMergedState()
+			})
+		} catch (error) {
+			const errorMessage = error instanceof Error ? error.message : String(error)
+			vscode.window.showErrorMessage(t("common:customModes.errors.deleteFailed", { error: errorMessage }))
+		}
+	}
 
 	/**
 	 * Deletes the rules folder for a specific mode
diff --git a/src/i18n/locales/ca/marketplace.json b/src/i18n/locales/ca/marketplace.json
index cf0710ac97..ca4303f943 100644
--- a/src/i18n/locales/ca/marketplace.json
+++ b/src/i18n/locales/ca/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "Error en instal·lar \"{{itemName}}\": {{errorMessage}}",
 		"removing": "Eliminant element: \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" eliminat correctament",
-		"removeError": "Error en eliminar \"{{itemName}}\": {{errorMessage}}"
+		"removeError": "Error en eliminar \"{{itemName}}\": {{errorMessage}}",
+		"notInstalledForTarget": "Mode no trobat"
 	}
 }
diff --git a/src/i18n/locales/de/marketplace.json b/src/i18n/locales/de/marketplace.json
index dea82aa44c..2e9e771f60 100644
--- a/src/i18n/locales/de/marketplace.json
+++ b/src/i18n/locales/de/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "Installation von \"{{itemName}}\" fehlgeschlagen: {{errorMessage}}",
 		"removing": "Element wird entfernt: \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" erfolgreich entfernt",
-		"removeError": "Entfernung von \"{{itemName}}\" fehlgeschlagen: {{errorMessage}}"
+		"removeError": "Entfernung von \"{{itemName}}\" fehlgeschlagen: {{errorMessage}}",
+		"notInstalledForTarget": "Modus nicht gefunden"
 	}
 }
diff --git a/src/i18n/locales/en/marketplace.json b/src/i18n/locales/en/marketplace.json
index 17ae20078a..b911cb8ec5 100644
--- a/src/i18n/locales/en/marketplace.json
+++ b/src/i18n/locales/en/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "Failed to install \"{{itemName}}\": {{errorMessage}}",
 		"removing": "Removing item: \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" removed successfully",
-		"removeError": "Failed to remove \"{{itemName}}\": {{errorMessage}}"
+		"removeError": "Failed to remove \"{{itemName}}\": {{errorMessage}}",
+		"notInstalledForTarget": "Mode not found"
 	}
 }
diff --git a/src/i18n/locales/es/marketplace.json b/src/i18n/locales/es/marketplace.json
index ecee7c1645..aecc70f763 100644
--- a/src/i18n/locales/es/marketplace.json
+++ b/src/i18n/locales/es/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "Error al instalar \"{{itemName}}\": {{errorMessage}}",
 		"removing": "Eliminando elemento: \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" eliminado correctamente",
-		"removeError": "Error al eliminar \"{{itemName}}\": {{errorMessage}}"
+		"removeError": "Error al eliminar \"{{itemName}}\": {{errorMessage}}",
+		"notInstalledForTarget": "Modo no encontrado"
 	}
 }
diff --git a/src/i18n/locales/fr/marketplace.json b/src/i18n/locales/fr/marketplace.json
index 7a6a3dbd74..bcf5d793b2 100644
--- a/src/i18n/locales/fr/marketplace.json
+++ b/src/i18n/locales/fr/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "Échec de l'installation de \"{{itemName}}\" : {{errorMessage}}",
 		"removing": "Suppression de l'élément : \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" supprimé avec succès",
-		"removeError": "Échec de la suppression de \"{{itemName}}\" : {{errorMessage}}"
+		"removeError": "Échec de la suppression de \"{{itemName}}\" : {{errorMessage}}",
+		"notInstalledForTarget": "Mode non trouvé"
 	}
 }
diff --git a/src/i18n/locales/hi/marketplace.json b/src/i18n/locales/hi/marketplace.json
index 3797c50b01..e30f95d6d9 100644
--- a/src/i18n/locales/hi/marketplace.json
+++ b/src/i18n/locales/hi/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "\"{{itemName}}\" इंस्टॉल करने में विफल: {{errorMessage}}",
 		"removing": "आइटम हटा रहे हैं: \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" सफलतापूर्वक हटाया गया",
-		"removeError": "\"{{itemName}}\" हटाने में विफल: {{errorMessage}}"
+		"removeError": "\"{{itemName}}\" हटाने में विफल: {{errorMessage}}",
+		"notInstalledForTarget": "मोड नहीं मिला"
 	}
 }
diff --git a/src/i18n/locales/id/marketplace.json b/src/i18n/locales/id/marketplace.json
index 7f31c78cbf..1194d54eb6 100644
--- a/src/i18n/locales/id/marketplace.json
+++ b/src/i18n/locales/id/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "Gagal menginstal \"{{itemName}}\": {{errorMessage}}",
 		"removing": "Menghapus item: \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" berhasil dihapus",
-		"removeError": "Gagal menghapus \"{{itemName}}\": {{errorMessage}}"
+		"removeError": "Gagal menghapus \"{{itemName}}\": {{errorMessage}}",
+		"notInstalledForTarget": "Mode tidak ditemukan"
 	}
 }
diff --git a/src/i18n/locales/it/marketplace.json b/src/i18n/locales/it/marketplace.json
index 46c50acc7d..fa80eb78f1 100644
--- a/src/i18n/locales/it/marketplace.json
+++ b/src/i18n/locales/it/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "Installazione di \"{{itemName}}\" fallita: {{errorMessage}}",
 		"removing": "Rimozione elemento: \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" rimosso con successo",
-		"removeError": "Rimozione di \"{{itemName}}\" fallita: {{errorMessage}}"
+		"removeError": "Rimozione di \"{{itemName}}\" fallita: {{errorMessage}}",
+		"notInstalledForTarget": "Modalità non trovata"
 	}
 }
diff --git a/src/i18n/locales/ja/marketplace.json b/src/i18n/locales/ja/marketplace.json
index 426a5db1fd..a7a7156f0c 100644
--- a/src/i18n/locales/ja/marketplace.json
+++ b/src/i18n/locales/ja/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "\"{{itemName}}\"のインストールに失敗しました: {{errorMessage}}",
 		"removing": "アイテムを削除中: \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\"の削除が完了しました",
-		"removeError": "\"{{itemName}}\"の削除に失敗しました: {{errorMessage}}"
+		"removeError": "\"{{itemName}}\"の削除に失敗しました: {{errorMessage}}",
+		"notInstalledForTarget": "モードが見つかりません"
 	}
 }
diff --git a/src/i18n/locales/ko/marketplace.json b/src/i18n/locales/ko/marketplace.json
index 349f0c5ad8..61c98e940a 100644
--- a/src/i18n/locales/ko/marketplace.json
+++ b/src/i18n/locales/ko/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "\"{{itemName}}\" 설치 실패: {{errorMessage}}",
 		"removing": "항목 제거 중: \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" 제거 완료",
-		"removeError": "\"{{itemName}}\" 제거 실패: {{errorMessage}}"
+		"removeError": "\"{{itemName}}\" 제거 실패: {{errorMessage}}",
+		"notInstalledForTarget": "모드를 찾을 수 없습니다"
 	}
 }
diff --git a/src/i18n/locales/nl/marketplace.json b/src/i18n/locales/nl/marketplace.json
index 1274666b9c..609ed2d3c5 100644
--- a/src/i18n/locales/nl/marketplace.json
+++ b/src/i18n/locales/nl/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "Installatie van \"{{itemName}}\" mislukt: {{errorMessage}}",
 		"removing": "Item verwijderen: \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" succesvol verwijderd",
-		"removeError": "Verwijdering van \"{{itemName}}\" mislukt: {{errorMessage}}"
+		"removeError": "Verwijdering van \"{{itemName}}\" mislukt: {{errorMessage}}",
+		"notInstalledForTarget": "Modus niet gevonden"
 	}
 }
diff --git a/src/i18n/locales/pl/marketplace.json b/src/i18n/locales/pl/marketplace.json
index 3ba3c076ad..d2a77a030e 100644
--- a/src/i18n/locales/pl/marketplace.json
+++ b/src/i18n/locales/pl/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "Instalacja \"{{itemName}}\" nie powiodła się: {{errorMessage}}",
 		"removing": "Usuwanie elementu: \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" usunięto pomyślnie",
-		"removeError": "Usunięcie \"{{itemName}}\" nie powiodło się: {{errorMessage}}"
+		"removeError": "Usunięcie \"{{itemName}}\" nie powiodło się: {{errorMessage}}",
+		"notInstalledForTarget": "Nie znaleziono trybu"
 	}
 }
diff --git a/src/i18n/locales/pt-BR/marketplace.json b/src/i18n/locales/pt-BR/marketplace.json
index b0e763b0ff..b5a0ab887f 100644
--- a/src/i18n/locales/pt-BR/marketplace.json
+++ b/src/i18n/locales/pt-BR/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "Falha ao instalar \"{{itemName}}\": {{errorMessage}}",
 		"removing": "Removendo item: \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" removido com sucesso",
-		"removeError": "Falha ao remover \"{{itemName}}\": {{errorMessage}}"
+		"removeError": "Falha ao remover \"{{itemName}}\": {{errorMessage}}",
+		"notInstalledForTarget": "Modo não encontrado"
 	}
 }
diff --git a/src/i18n/locales/ru/marketplace.json b/src/i18n/locales/ru/marketplace.json
index 1c4ba45df5..3f53914772 100644
--- a/src/i18n/locales/ru/marketplace.json
+++ b/src/i18n/locales/ru/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "Не удалось установить \"{{itemName}}\": {{errorMessage}}",
 		"removing": "Удаление элемента: \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" успешно удален",
-		"removeError": "Не удалось удалить \"{{itemName}}\": {{errorMessage}}"
+		"removeError": "Не удалось удалить \"{{itemName}}\": {{errorMessage}}",
+		"notInstalledForTarget": "Режим не найден"
 	}
 }
diff --git a/src/i18n/locales/tr/marketplace.json b/src/i18n/locales/tr/marketplace.json
index 628c239a12..f60ec3c6e8 100644
--- a/src/i18n/locales/tr/marketplace.json
+++ b/src/i18n/locales/tr/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "\"{{itemName}}\" yüklenemedi: {{errorMessage}}",
 		"removing": "Öğe kaldırılıyor: \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" başarıyla kaldırıldı",
-		"removeError": "\"{{itemName}}\" kaldırılamadı: {{errorMessage}}"
+		"removeError": "\"{{itemName}}\" kaldırılamadı: {{errorMessage}}",
+		"notInstalledForTarget": "Mod bulunamadı"
 	}
 }
diff --git a/src/i18n/locales/vi/marketplace.json b/src/i18n/locales/vi/marketplace.json
index 8fbc1a7ad0..f6cda48e35 100644
--- a/src/i18n/locales/vi/marketplace.json
+++ b/src/i18n/locales/vi/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "Cài đặt \"{{itemName}}\" thất bại: {{errorMessage}}",
 		"removing": "Đang xóa mục: \"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" đã được xóa thành công",
-		"removeError": "Xóa \"{{itemName}}\" thất bại: {{errorMessage}}"
+		"removeError": "Xóa \"{{itemName}}\" thất bại: {{errorMessage}}",
+		"notInstalledForTarget": "Không tìm thấy chế độ"
 	}
 }
diff --git a/src/i18n/locales/zh-CN/marketplace.json b/src/i18n/locales/zh-CN/marketplace.json
index a69e9c1e9d..06c1d0463d 100644
--- a/src/i18n/locales/zh-CN/marketplace.json
+++ b/src/i18n/locales/zh-CN/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "\"{{itemName}}\" 安装失败：{{errorMessage}}",
 		"removing": "正在移除项目：\"{{itemName}}\"",
 		"removeSuccess": "\"{{itemName}}\" 移除成功",
-		"removeError": "\"{{itemName}}\" 移除失败：{{errorMessage}}"
+		"removeError": "\"{{itemName}}\" 移除失败：{{errorMessage}}",
+		"notInstalledForTarget": "未找到模式"
 	}
 }
diff --git a/src/i18n/locales/zh-TW/marketplace.json b/src/i18n/locales/zh-TW/marketplace.json
index 9270314108..37c4e8f760 100644
--- a/src/i18n/locales/zh-TW/marketplace.json
+++ b/src/i18n/locales/zh-TW/marketplace.json
@@ -64,6 +64,7 @@
 		"installError": "「{{itemName}}」安裝失敗：{{errorMessage}}",
 		"removing": "正在移除項目：「{{itemName}}」",
 		"removeSuccess": "「{{itemName}}」移除成功",
-		"removeError": "「{{itemName}}」移除失敗：{{errorMessage}}"
+		"removeError": "「{{itemName}}」移除失敗：{{errorMessage}}",
+		"notInstalledForTarget": "找不到模式"
 	}
 }
diff --git a/src/services/marketplace/MarketplaceManager.ts b/src/services/marketplace/MarketplaceManager.ts
index dfde5600b9..72ac6b64da 100644
--- a/src/services/marketplace/MarketplaceManager.ts
+++ b/src/services/marketplace/MarketplaceManager.ts
@@ -4,7 +4,14 @@ import * as path from "path"
 import * as vscode from "vscode"
 import * as yaml from "yaml"
 
-import type { OrganizationSettings, MarketplaceItem, MarketplaceItemType, McpMarketplaceItem } from "@roo-code/types"
+import type {
+	OrganizationSettings,
+	MarketplaceItem,
+	MarketplaceItemType,
+	McpMarketplaceItem,
+	ModeConfig,
+} from "@roo-code/types"
+import { customModesSettingsSchema } from "@roo-code/types"
 import { TelemetryService } from "@roo-code/telemetry"
 import { CloudService } from "@roo-code/cloud"
 
@@ -241,6 +248,35 @@ export class MarketplaceManager {
 		return metadata
 	}
 
+	// Helper: identify marketplace-installed modes
+	private isMarketplaceInstalledMode(
+		mode: ModeConfig,
+	): mode is ModeConfig & { installedFromMarketplace: true; marketplaceItemId: string } {
+		return (
+			mode.installedFromMarketplace === true &&
+			typeof mode.marketplaceItemId === "string" &&
+			mode.marketplaceItemId.length > 0
+		)
+	}
+
+	// Helper: parse YAML and collect installed mode metadata with proper typing
+	private collectInstalledModesFromYaml(content: string, out: Record<string, { type: string }>): void {
+		try {
+			const parsed = yaml.parse(content)
+			const result = customModesSettingsSchema.safeParse(parsed)
+			if (!result.success) {
+				return
+			}
+			for (const mode of result.data.customModes) {
+				if (this.isMarketplaceInstalledMode(mode)) {
+					out[mode.marketplaceItemId] = { type: "mode" }
+				}
+			}
+		} catch {
+			// Ignore parse errors here; caller handles file existence/errors
+		}
+	}
+
 	/**
 	 * Check for project-level installed items
 	 */
@@ -255,16 +291,7 @@ export class MarketplaceManager {
 			const projectModesPath = path.join(workspaceFolder.uri.fsPath, ".roomodes")
 			try {
 				const content = await fs.readFile(projectModesPath, "utf-8")
-				const data = yaml.parse(content)
-				if (data?.customModes && Array.isArray(data.customModes)) {
-					for (const mode of data.customModes) {
-						if (mode.slug) {
-							metadata[mode.slug] = {
-								type: "mode",
-							}
-						}
-					}
-				}
+				this.collectInstalledModesFromYaml(content, metadata)
 			} catch (error) {
 				// File doesn't exist or can't be read, skip
 			}
@@ -300,16 +327,7 @@ export class MarketplaceManager {
 			const globalModesPath = path.join(globalSettingsPath, GlobalFileNames.customModes)
 			try {
 				const content = await fs.readFile(globalModesPath, "utf-8")
-				const data = yaml.parse(content)
-				if (data?.customModes && Array.isArray(data.customModes)) {
-					for (const mode of data.customModes) {
-						if (mode.slug) {
-							metadata[mode.slug] = {
-								type: "mode",
-							}
-						}
-					}
-				}
+				this.collectInstalledModesFromYaml(content, metadata)
 			} catch (error) {
 				// File doesn't exist or can't be read, skip
 			}
diff --git a/src/services/marketplace/SimpleInstaller.ts b/src/services/marketplace/SimpleInstaller.ts
index be002e2f1d..ac53c14fb8 100644
--- a/src/services/marketplace/SimpleInstaller.ts
+++ b/src/services/marketplace/SimpleInstaller.ts
@@ -2,14 +2,16 @@ import * as vscode from "vscode"
 import * as path from "path"
 import * as fs from "fs/promises"
 import * as yaml from "yaml"
-import type { MarketplaceItem, MarketplaceItemType, InstallMarketplaceItemOptions, McpParameter } from "@roo-code/types"
+import type { MarketplaceItem, McpParameter, ModeConfig } from "@roo-code/types"
 import { GlobalFileNames } from "../../shared/globalFileNames"
 import { ensureSettingsDirectoryExists } from "../../utils/globalContext"
 import type { CustomModesManager } from "../../core/config/CustomModesManager"
+import { t } from "../../i18n"
 
-export interface InstallOptions extends InstallMarketplaceItemOptions {
+export interface InstallOptions {
 	target: "project" | "global"
 	selectedIndex?: number // Which installation method to use (for array content)
+	parameters?: Record<string, any>
 }
 
 export class SimpleInstaller {
@@ -20,6 +22,7 @@ export class SimpleInstaller {
 
 	async installItem(item: MarketplaceItem, options: InstallOptions): Promise<{ filePath: string; line?: number }> {
 		const { target } = options
+		const itemType = item.type
 
 		switch (item.type) {
 			case "mode":
@@ -27,7 +30,7 @@ export class SimpleInstaller {
 			case "mcp":
 				return await this.installMcp(item, target, options)
 			default:
-				throw new Error(`Unsupported item type: ${(item as any).type}`)
+				throw new Error(`Unsupported item type: ${itemType}`)
 		}
 	}
 
@@ -47,8 +50,14 @@ export class SimpleInstaller {
 		// If CustomModesManager is available, use importModeWithRules
 		if (this.customModesManager) {
 			// Transform marketplace content to import format (wrap in customModes array)
+			const parsedMode = yaml.parse(item.content)
+			// Annotate marketplace origin to disambiguate from user-created modes
+			if (parsedMode && typeof parsedMode === "object") {
+				;(parsedMode as ModeConfig).installedFromMarketplace = true
+				;(parsedMode as ModeConfig).marketplaceItemId = item.id
+			}
 			const importData = {
-				customModes: [yaml.parse(item.content)],
+				customModes: [parsedMode],
 			}
 			const importYaml = yaml.stringify(importData)
 
@@ -72,7 +81,7 @@ export class SimpleInstaller {
 				// Find the line containing the slug of the added mode
 				if (modeData?.slug) {
 					const slugLineIndex = lines.findIndex(
-						(l) => l.includes(`slug: ${modeData.slug}`) || l.includes(`slug: "${modeData.slug}"`),
+						(l: string) => l.includes(`slug: ${modeData.slug}`) || l.includes(`slug: "${modeData.slug}"`),
 					)
 					if (slugLineIndex >= 0) {
 						line = slugLineIndex + 1 // Convert to 1-based line number
@@ -88,6 +97,11 @@ export class SimpleInstaller {
 		// Fallback to original implementation if CustomModesManager is not available
 		const filePath = await this.getModeFilePath(target)
 		const modeData = yaml.parse(item.content)
+		// Annotate marketplace origin fields for fallback path as well
+		if (modeData && typeof modeData === "object") {
+			;(modeData as ModeConfig).installedFromMarketplace = true
+			;(modeData as ModeConfig).marketplaceItemId = item.id
+		}
 
 		// Read existing file or create new structure
 		let existingData: any = { customModes: [] }
@@ -143,7 +157,7 @@ export class SimpleInstaller {
 			const addedMode = existingData.customModes[addedModeIndex]
 			if (addedMode?.slug) {
 				const slugLineIndex = lines.findIndex(
-					(l) => l.includes(`slug: ${addedMode.slug}`) || l.includes(`slug: "${addedMode.slug}"`),
+					(l: string) => l.includes(`slug: ${addedMode.slug}`) || l.includes(`slug: "${addedMode.slug}"`),
 				)
 				if (slugLineIndex >= 0) {
 					line = slugLineIndex + 1 // Convert to 1-based line number
@@ -280,6 +294,7 @@ export class SimpleInstaller {
 
 	async removeItem(item: MarketplaceItem, options: InstallOptions): Promise<void> {
 		const { target } = options
+		const itemType = item.type
 
 		switch (item.type) {
 			case "mode":
@@ -289,7 +304,7 @@ export class SimpleInstaller {
 				await this.removeMcp(item, target)
 				break
 			default:
-				throw new Error(`Unsupported item type: ${(item as any).type}`)
+				throw new Error(`Unsupported item type: ${itemType}`)
 		}
 	}
 
@@ -319,13 +334,23 @@ export class SimpleInstaller {
 			throw new Error("Mode missing slug identifier")
 		}
 
-		// Get the current modes to determine the source
+		// Get the current modes and locate the exact marketplace-installed mode for the selected target
 		const modes = await this.customModesManager.getCustomModes()
-		const mode = modes.find((m) => m.slug === modeSlug)
+		const candidate = modes.find(
+			(m: ModeConfig) =>
+				m.slug === modeSlug &&
+				m.installedFromMarketplace === true &&
+				m.marketplaceItemId === item.id &&
+				m.source === target,
+		)
 
-		// Use CustomModesManager to delete the mode configuration
-		// This also handles rules folder deletion
-		await this.customModesManager.deleteCustomMode(modeSlug, true)
+		if (!candidate) {
+			const msg = t("marketplace:installation.notInstalledForTarget")
+			throw new Error(msg === "installation.notInstalledForTarget" ? "Mode not found" : msg)
+		}
+
+		// Delete only from the selected source to avoid unintended removals
+		await this.customModesManager.deleteCustomModeForSource(modeSlug, target, true)
 	}
 
 	private async removeMcp(item: MarketplaceItem, target: "project" | "global"): Promise<void> {
diff --git a/src/services/marketplace/__tests__/SimpleInstaller.spec.ts b/src/services/marketplace/__tests__/SimpleInstaller.spec.ts
index 94684056d4..061fb81dc9 100644
--- a/src/services/marketplace/__tests__/SimpleInstaller.spec.ts
+++ b/src/services/marketplace/__tests__/SimpleInstaller.spec.ts
@@ -42,6 +42,7 @@ describe("SimpleInstaller", () => {
 		mockContext = {} as vscode.ExtensionContext
 		mockCustomModesManager = {
 			deleteCustomMode: vi.fn().mockResolvedValue(undefined),
+			deleteCustomModeForSource: vi.fn().mockResolvedValue(undefined),
 			importModeWithRules: vi.fn().mockResolvedValue({ success: true }),
 			getCustomModes: vi.fn().mockResolvedValue([]),
 		} as any
@@ -220,13 +221,13 @@ describe("SimpleInstaller", () => {
 		it("should use CustomModesManager to delete mode and clean up rules folder", async () => {
 			// Mock that the mode exists with project source
 			vi.mocked(mockCustomModesManager.getCustomModes).mockResolvedValueOnce([
-				{ slug: "test", name: "Test Mode", source: "project" } as any,
+				{ slug: "test", name: "Test Mode", source: "project", installedFromMarketplace: true, marketplaceItemId: "test-mode" } as any,
 			])
 
 			await installer.removeItem(mockModeItem, { target: "project" })
 
-			// Should call deleteCustomMode with fromMarketplace flag set to true
-			expect(mockCustomModesManager.deleteCustomMode).toHaveBeenCalledWith("test", true)
+			// Should call scoped deletion for the selected source with fromMarketplace flag set to true
+			expect((mockCustomModesManager as any).deleteCustomModeForSource).toHaveBeenCalledWith("test", "project", true)
 			// The rules folder deletion is now handled by CustomModesManager, not SimpleInstaller
 			expect(fileExistsAtPath).not.toHaveBeenCalled()
 			expect(mockFs.rm).not.toHaveBeenCalled()
@@ -235,13 +236,13 @@ describe("SimpleInstaller", () => {
 		it("should handle global mode removal with rules cleanup", async () => {
 			// Mock that the mode exists with global source
 			vi.mocked(mockCustomModesManager.getCustomModes).mockResolvedValueOnce([
-				{ slug: "test", name: "Test Mode", source: "global" } as any,
+				{ slug: "test", name: "Test Mode", source: "global", installedFromMarketplace: true, marketplaceItemId: "test-mode" } as any,
 			])
 
 			await installer.removeItem(mockModeItem, { target: "global" })
 
-			// Should call deleteCustomMode with fromMarketplace flag set to true
-			expect(mockCustomModesManager.deleteCustomMode).toHaveBeenCalledWith("test", true)
+			// Should call scoped deletion for the selected source with fromMarketplace flag set to true
+			expect((mockCustomModesManager as any).deleteCustomModeForSource).toHaveBeenCalledWith("test", "global", true)
 			// The rules folder deletion is now handled by CustomModesManager, not SimpleInstaller
 			expect(fileExistsAtPath).not.toHaveBeenCalled()
 			expect(mockFs.rm).not.toHaveBeenCalled()
@@ -250,13 +251,13 @@ describe("SimpleInstaller", () => {
 		it("should handle case when rules folder does not exist", async () => {
 			// Mock that the mode exists
 			vi.mocked(mockCustomModesManager.getCustomModes).mockResolvedValueOnce([
-				{ slug: "test", name: "Test Mode", source: "project" } as any,
+				{ slug: "test", name: "Test Mode", source: "project", installedFromMarketplace: true, marketplaceItemId: "test-mode" } as any,
 			])
 
 			await installer.removeItem(mockModeItem, { target: "project" })
 
-			// Should call deleteCustomMode with fromMarketplace flag set to true
-			expect(mockCustomModesManager.deleteCustomMode).toHaveBeenCalledWith("test", true)
+			// Should call scoped deletion for the selected source with fromMarketplace flag set to true
+			expect((mockCustomModesManager as any).deleteCustomModeForSource).toHaveBeenCalledWith("test", "project", true)
 			// The rules folder deletion is now handled by CustomModesManager, not SimpleInstaller
 			expect(fileExistsAtPath).not.toHaveBeenCalled()
 			expect(mockFs.rm).not.toHaveBeenCalled()
@@ -265,27 +266,26 @@ describe("SimpleInstaller", () => {
 		it("should throw error if deleteCustomMode fails", async () => {
 			// Mock that the mode exists
 			vi.mocked(mockCustomModesManager.getCustomModes).mockResolvedValueOnce([
-				{ slug: "test", name: "Test Mode", source: "project" } as any,
+				{ slug: "test", name: "Test Mode", source: "project", installedFromMarketplace: true, marketplaceItemId: "test-mode" } as any,
 			])
-			// Mock that deleteCustomMode fails
-			mockCustomModesManager.deleteCustomMode = vi.fn().mockRejectedValueOnce(new Error("Permission denied"))
+			// Mock that scoped deletion fails
+			;(mockCustomModesManager as any).deleteCustomModeForSource = vi
+				.fn()
+				.mockRejectedValueOnce(new Error("Permission denied"))
 
-			// Should throw the error from deleteCustomMode
+			// Should throw the error from scoped deletion
 			await expect(installer.removeItem(mockModeItem, { target: "project" })).rejects.toThrow("Permission denied")
 
-			expect(mockCustomModesManager.deleteCustomMode).toHaveBeenCalledWith("test", true)
+			expect((mockCustomModesManager as any).deleteCustomModeForSource).toHaveBeenCalledWith("test", "project", true)
 		})
 
-		it("should handle mode not found in custom modes list", async () => {
+		it("should throw when mode is not marketplace-installed for selected target", async () => {
 			// Mock that the mode doesn't exist in the list
 			vi.mocked(mockCustomModesManager.getCustomModes).mockResolvedValueOnce([])
 
-			await installer.removeItem(mockModeItem, { target: "project" })
+			await expect(installer.removeItem(mockModeItem, { target: "project" })).rejects.toThrow(/(Mode not found|customModes\.errors\.modeNotFound)/)
 
-			expect(mockCustomModesManager.deleteCustomMode).toHaveBeenCalledWith("test", true)
-			// Should not attempt to delete rules folder
-			expect(fileExistsAtPath).not.toHaveBeenCalled()
-			expect(mockFs.rm).not.toHaveBeenCalled()
+			expect((mockCustomModesManager as any).deleteCustomModeForSource).not.toHaveBeenCalled()
 		})
 
 		it("should throw error when mode content is invalid YAML", async () => {
@@ -333,9 +333,14 @@ describe("SimpleInstaller", () => {
 				] as any,
 			}
 
+			// Mock installed marketplace mode with matching marketplaceItemId and source
+			vi.mocked(mockCustomModesManager.getCustomModes).mockResolvedValueOnce([
+				{ slug: "test-array", name: "Test Array Mode", source: "project", installedFromMarketplace: true, marketplaceItemId: "test-mode" } as any,
+			])
+
 			await installer.removeItem(arrayContentItem, { target: "project" })
 
-			expect(mockCustomModesManager.deleteCustomMode).toHaveBeenCalledWith("test-array", true)
+			expect((mockCustomModesManager as any).deleteCustomModeForSource).toHaveBeenCalledWith("test-array", "project", true)
 		})
 
 		it("should throw error when CustomModesManager is not available", async () => {