Fix task export button: resolve the SDK session folder reliably (#12772)

* Restore task export to markdown and show download button in all builds

* Render untyped tool outputs and object tool inputs as JSON in task export

* Open the task's SDK session folder from the export button and show it in all builds

* Keep the task header session-folder button dev-only

apps/vscode/proto/cline/task.proto

@@ -29,7 +29,7 @@ service TaskService {
   rpc newTask(NewTaskRequest) returns (String);
   // Shows a task with the specified ID
   rpc showTaskWithId(StringRequest) returns (TaskResponse);
-  // Exports a task with the given ID to markdown
+  // Opens the on-disk session directory (messages json, logs) for the task with the given ID
   rpc exportTaskWithId(StringRequest) returns (Empty);
   // Toggles the favorite status of a task
   rpc toggleTaskFavorite(TaskFavoriteRequest) returns (Empty);

apps/vscode/src/sdk/SdkController.ts

@@ -1799,16 +1799,9 @@ export class Controller {
 	}
 
 	async exportTaskWithId(id: string): Promise<void> {
-		const historyItem = (await this.taskHistory.listHistory({ hydrate: false })).find((item) => item.sessionId === id)
-		if (!historyItem) {
-			throw new Error(`Task not found in history: ${id}`)
-		}
-
-		const taskDirPath = historyItem.messagesPath
-			? path.dirname(historyItem.messagesPath)
-			: this.taskHistory.getLegacyTaskDirPath(id)
+		const taskDirPath = await this.taskHistory.getTaskDirPath(id)
 		if (!taskDirPath) {
-			throw new Error(`Task history item has no artifact path: ${id}`)
+			throw new Error(`Task not found in history: ${id}`)
 		}
 
 		await fs.access(taskDirPath)

apps/vscode/src/sdk/sdk-task-history.ts

@@ -1,7 +1,9 @@
+import { existsSync } from "node:fs"
 import path from "node:path"
 import type { ClineCoreListHistoryOptions, SessionHistoryRecord } from "@cline/core"
 import type { Message as SdkMessage } from "@cline/llms"
 import { formatDisplayUserInput, parseUserInputMode } from "@cline/shared"
+import { resolveSessionDataDir } from "@cline/shared/storage"
 import type { ClineMessage } from "@shared/ExtensionMessage"
 import type { HistoryItem } from "@shared/HistoryItem"
 import getFolderSize from "get-folder-size"
@@ -473,6 +475,33 @@ export class SdkTaskHistory {
 		return clineMessages
 	}
 
+	/**
+	 * Absolute path of the directory holding the task's on-disk artifacts: the SDK
+	 * session folder (manifest json + messages json) for SDK tasks, or the legacy
+	 * tasks/<id> folder for pre-SDK tasks. Undefined when the task is unknown.
+	 */
+	async getTaskDirPath(taskId: string): Promise<string | undefined> {
+		const sdkRecord = await this.getSdkRecord(taskId)
+		if (sdkRecord) {
+			const messagesPath = typeof sdkRecord.messagesPath === "string" ? sdkRecord.messagesPath.trim() : ""
+			if (messagesPath) {
+				return path.dirname(messagesPath)
+			}
+			// Older records may lack messagesPath; fall back to the canonical
+			// session directory when it exists on disk.
+			const sessionDir = path.join(resolveSessionDataDir(), taskId)
+			if (existsSync(sessionDir)) {
+				return sessionDir
+			}
+		}
+		return this.getLegacyTaskDirPath(taskId)
+	}
+
+	getLegacyTaskDirPath(taskId: string): string | undefined {
+		const legacyTask = this.findLegacyTask(taskId)
+		return legacyTask ? taskDirPath(taskId, legacyTask.dataDir) : undefined
+	}
+
 	/**
 	 * The persisted session status ("completed" | "cancelled" | "failed" | ...).
 	 * Persisted messages cannot distinguish a completed conversation from one
@@ -513,11 +542,6 @@ export class SdkTaskHistory {
 		return appendLegacyResumeWarning(fallbackMessages as { role: string; content: unknown }[])
 	}
 
-	getLegacyTaskDirPath(taskId: string): string | undefined {
-		const legacyTask = this.findLegacyTask(taskId)
-		return legacyTask ? taskDirPath(taskId, legacyTask.dataDir) : undefined
-	}
-
 	private async updateSession(sessionId: string, item: HistoryItem): Promise<void> {
 		const { metadata: writtenMetadata, updated } = await this.withHistoryHost(async (host) => {
 			const existing = await host.get(sessionId)

apps/vscode/src/types/cline-shared-storage.d.ts

@@ -1,3 +1,4 @@
 declare module "@cline/shared/storage" {
 	export function resolveGlobalSettingsPath(): string
+	export function resolveSessionDataDir(): string
 }