diff --git a/.changeset/dull-hats-swim.md b/.changeset/dull-hats-swim.md
new file mode 100644
index 00000000000..55bd00f33b6
--- /dev/null
+++ b/.changeset/dull-hats-swim.md
@@ -0,0 +1,5 @@
+---
+"roo-cline": patch
+---
+
+Add a JSONL version of task persistence
diff --git a/src/core/task-persistence/taskMessages.jsonl.ts b/src/core/task-persistence/taskMessages.jsonl.ts
new file mode 100644
index 00000000000..d4a0d3d1b02
--- /dev/null
+++ b/src/core/task-persistence/taskMessages.jsonl.ts
@@ -0,0 +1,56 @@
+import * as path from "path"
+import * as fs from "fs/promises"
+import * as readline from "readline"
+import { createReadStream } from "fs"
+
+import { fileExistsAtPath } from "../../utils/fs"
+
+import { GlobalFileNames } from "../../shared/globalFileNames"
+import { ClineMessage } from "../../shared/ExtensionMessage"
+import { getTaskDirectoryPath } from "../../shared/storagePathManager"
+
+import type { ReadTaskMessagesOptions, SaveTaskMessagesOptions } from "./taskMessages"
+
+export async function readTaskMessages({
+	taskId,
+	globalStoragePath,
+}: ReadTaskMessagesOptions): Promise<ClineMessage[]> {
+	const taskDir = await getTaskDirectoryPath(globalStoragePath, taskId)
+	const filePath = path.join(taskDir, `${GlobalFileNames.apiConversationHistory}l`)
+	const fileExists = await fileExistsAtPath(filePath)
+
+	if (!fileExists) {
+		return []
+	}
+
+	const messages: ClineMessage[] = []
+	const fileStream = createReadStream(filePath, { encoding: "utf8" })
+	const rl = readline.createInterface({ input: fileStream, crlfDelay: Infinity })
+
+	for await (const line of rl) {
+		if (line.trim()) {
+			messages.push(JSON.parse(line))
+		}
+	}
+
+	return messages
+}
+
+export async function writeTaskMessages({ messages, taskId, globalStoragePath }: SaveTaskMessagesOptions) {
+	const taskDir = await getTaskDirectoryPath(globalStoragePath, taskId)
+	const filePath = path.join(taskDir, `${GlobalFileNames.apiConversationHistory}l`)
+	const content = messages.map((message) => JSON.stringify(message)).join("\n")
+	await fs.writeFile(filePath, content)
+}
+
+export type AppendTaskMessageOptions = {
+	message: ClineMessage
+	taskId: string
+	globalStoragePath: string
+}
+
+export async function appendTaskMessage({ message, taskId, globalStoragePath }: AppendTaskMessageOptions) {
+	const taskDir = await getTaskDirectoryPath(globalStoragePath, taskId)
+	const filePath = path.join(taskDir, `${GlobalFileNames.apiConversationHistory}l`)
+	await fs.appendFile(filePath, JSON.stringify(message) + "\n")
+}
diff --git a/src/core/task-persistence/taskMetadata.ts b/src/core/task-persistence/taskMetadata.ts
index 659ba580cf0..9784e622958 100644
--- a/src/core/task-persistence/taskMetadata.ts
+++ b/src/core/task-persistence/taskMetadata.ts
@@ -9,7 +9,7 @@ import { findLastIndex } from "../../shared/array"
 import { HistoryItem } from "../../shared/HistoryItem"
 import { getTaskDirectoryPath } from "../../shared/storagePathManager"
 
-const taskSizeCache = new NodeCache({ stdTTL: 5 * 60, checkperiod: 30 })
+const taskSizeCache = new NodeCache({ stdTTL: 30, checkperiod: 5 * 60 })
 
 export type TaskMetadataOptions = {
 	messages: ClineMessage[]