Adding a Disable automatic context clearing to Experimental section

packages/types/src/experiment.ts

@@ -6,7 +6,7 @@ import type { Keys, Equals, AssertEqual } from "./type-fu.js"
  * ExperimentId
  */
 
-export const experimentIds = ["powerSteering", "concurrentFileReads"] as const
+export const experimentIds = ["powerSteering", "concurrentFileReads", "disableSlidingWindow"] as const
 
 export const experimentIdsSchema = z.enum(experimentIds)
 
@@ -19,6 +19,7 @@ export type ExperimentId = z.infer<typeof experimentIdsSchema>
 export const experimentsSchema = z.object({
 	powerSteering: z.boolean(),
 	concurrentFileReads: z.boolean(),
+	disableSlidingWindow: z.boolean(),
 })
 
 export type Experiments = z.infer<typeof experimentsSchema>

packages/types/src/global-settings.ts

@@ -48,7 +48,7 @@ export const globalSettingsSchema = z.object({
 	allowedMaxRequests: z.number().nullish(),
 	autoCondenseContext: z.boolean().optional(),
 	autoCondenseContextPercent: z.number().optional(),
- 	maxConcurrentFileReads: z.number().optional(),
+		maxConcurrentFileReads: z.number().optional(),
 
 	browserToolEnabled: z.boolean().optional(),
 	browserViewportSize: z.string().optional(),

src/core/sliding-window/__tests__/sliding-window.test.ts

@@ -263,6 +263,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -302,6 +303,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -335,6 +337,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -347,6 +350,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -366,6 +370,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -378,6 +383,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -412,6 +418,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -445,6 +452,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -471,6 +479,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -507,6 +516,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -552,6 +562,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: true,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -617,6 +628,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: true,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -662,6 +674,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 50, // This shouldn't matter since autoCondenseContext is false
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -717,6 +730,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: true,
 				autoCondenseContextPercent: 50, // Set threshold to 50% - our tokens are at 60%
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -767,6 +781,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: true,
 				autoCondenseContextPercent: 50, // Set threshold to 50% - our tokens are at 40%
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -785,6 +800,78 @@ describe("Sliding Window", () => {
 			// Clean up
 			summarizeSpy.mockRestore()
 		})
+
+		it("should not truncate when disableSlidingWindow is true even if tokens exceed threshold", async () => {
+			const modelInfo = createModelInfo(100000, 30000)
+			const totalTokens = 80001 // Well above threshold
+
+			// Create messages with very small content in the last one to avoid token overflow
+			const messagesWithSmallContent = [
+				...messages.slice(0, -1),
+				{ ...messages[messages.length - 1], content: "" },
+			]
+
+			const result = await truncateConversationIfNeeded({
+				messages: messagesWithSmallContent,
+				totalTokens,
+				contextWindow: modelInfo.contextWindow,
+				maxTokens: modelInfo.maxTokens,
+				apiHandler: mockApiHandler,
+				autoCondenseContext: false,
+				autoCondenseContextPercent: 100,
+				disableSlidingWindow: true, // This should prevent any truncation
+				systemPrompt: "System prompt",
+				taskId,
+			})
+
+			// Should return original messages without any truncation
+			expect(result).toEqual({
+				messages: messagesWithSmallContent,
+				summary: "",
+				cost: 0,
+				prevContextTokens: totalTokens,
+			})
+		})
+
+		it("should not use summarizeConversation when disableSlidingWindow is true even with autoCondenseContext enabled", async () => {
+			// Reset any previous mock calls
+			jest.clearAllMocks()
+			const summarizeSpy = jest.spyOn(condenseModule, "summarizeConversation")
+
+			const modelInfo = createModelInfo(100000, 30000)
+			const totalTokens = 80001 // Well above threshold
+			const messagesWithSmallContent = [
+				...messages.slice(0, -1),
+				{ ...messages[messages.length - 1], content: "" },
+			]
+
+			const result = await truncateConversationIfNeeded({
+				messages: messagesWithSmallContent,
+				totalTokens,
+				contextWindow: modelInfo.contextWindow,
+				maxTokens: modelInfo.maxTokens,
+				apiHandler: mockApiHandler,
+				autoCondenseContext: true, // This would normally trigger summarization
+				autoCondenseContextPercent: 50, // Well below our 80% usage
+				disableSlidingWindow: true, // This should prevent any processing
+				systemPrompt: "System prompt",
+				taskId,
+			})
+
+			// Verify summarizeConversation was not called
+			expect(summarizeSpy).not.toHaveBeenCalled()
+
+			// Should return original messages without any processing
+			expect(result).toEqual({
+				messages: messagesWithSmallContent,
+				summary: "",
+				cost: 0,
+				prevContextTokens: totalTokens,
+			})
+
+			// Clean up
+			summarizeSpy.mockRestore()
+		})
 	})
 
 	/**
@@ -827,6 +914,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -846,6 +934,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -876,6 +965,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -895,6 +985,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -924,6 +1015,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -938,6 +1030,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -965,6 +1058,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})
@@ -979,6 +1073,7 @@ describe("Sliding Window", () => {
 				apiHandler: mockApiHandler,
 				autoCondenseContext: false,
 				autoCondenseContextPercent: 100,
+				disableSlidingWindow: false,
 				systemPrompt: "System prompt",
 				taskId,
 			})

src/core/sliding-window/index.ts

@@ -70,6 +70,7 @@ type TruncateOptions = {
 	apiHandler: ApiHandler
 	autoCondenseContext: boolean
 	autoCondenseContextPercent: number
+	disableSlidingWindow: boolean
 	systemPrompt: string
 	taskId: string
 	customCondensingPrompt?: string
@@ -93,6 +94,7 @@ export async function truncateConversationIfNeeded({
 	apiHandler,
 	autoCondenseContext,
 	autoCondenseContextPercent,
+	disableSlidingWindow,
 	systemPrompt,
 	taskId,
 	customCondensingPrompt,
@@ -113,6 +115,11 @@ export async function truncateConversationIfNeeded({
 	// Calculate total effective tokens (totalTokens never includes the last message)
 	const prevContextTokens = totalTokens + lastMessageTokens
 
+	// If sliding window is disabled, return original messages without any truncation
+	if (disableSlidingWindow) {
+		return { messages, summary: "", cost, prevContextTokens, error }
+	}
+
 	// Calculate available tokens for conversation history
 	// Truncate if we're within TOKEN_BUFFER_PERCENTAGE of the context window
 	const allowedTokens = contextWindow * (1 - TOKEN_BUFFER_PERCENTAGE) - reservedTokens

src/core/task/Task.ts

@@ -8,6 +8,8 @@ import delay from "delay"
 import pWaitFor from "p-wait-for"
 import { serializeError } from "serialize-error"
 
+import { experiments, EXPERIMENT_IDS, experimentDefault } from "../../shared/experiments"
+
 import {
 	type ProviderSettings,
 	type TokenUsage,
@@ -1607,6 +1609,7 @@ export class Task extends EventEmitter<ClineEvents> {
 			mode,
 			autoCondenseContext = true,
 			autoCondenseContextPercent = 100,
+			experiments: experimentsConfig = {},
 		} = state ?? {}
 
 		// Get condensing configuration for automatic triggers
@@ -1677,6 +1680,7 @@ export class Task extends EventEmitter<ClineEvents> {
 				apiHandler: this.api,
 				autoCondenseContext,
 				autoCondenseContextPercent,
+				disableSlidingWindow: experiments.isEnabled({ ...experimentDefault, ...experimentsConfig }, EXPERIMENT_IDS.DISABLE_SLIDING_WINDOW),
 				systemPrompt,
 				taskId: this.taskId,
 				customCondensingPrompt,

src/shared/WebviewMessage.ts

@@ -62,6 +62,7 @@ export interface WebviewMessage {
 		| "alwaysAllowSubtasks"
 		| "autoCondenseContext"
 		| "autoCondenseContextPercent"
+		| "disableSlidingWindow"
 		| "condensingApiConfigId"
 		| "updateCondensingPrompt"
 		| "playSound"

src/shared/__tests__/experiments.test.ts

@@ -19,6 +19,7 @@ describe("experiments", () => {
 			const experiments: Record<ExperimentId, boolean> = {
 				powerSteering: false,
 				concurrentFileReads: false,
+				disableSlidingWindow: false,
 			}
 			expect(Experiments.isEnabled(experiments, EXPERIMENT_IDS.POWER_STEERING)).toBe(false)
 		})
@@ -27,6 +28,7 @@ describe("experiments", () => {
 			const experiments: Record<ExperimentId, boolean> = {
 				powerSteering: true,
 				concurrentFileReads: false,
+				disableSlidingWindow: false,
 			}
 			expect(Experiments.isEnabled(experiments, EXPERIMENT_IDS.POWER_STEERING)).toBe(true)
 		})
@@ -35,6 +37,7 @@ describe("experiments", () => {
 			const experiments: Record<ExperimentId, boolean> = {
 				powerSteering: false,
 				concurrentFileReads: false,
+				disableSlidingWindow: false,
 			}
 			expect(Experiments.isEnabled(experiments, EXPERIMENT_IDS.POWER_STEERING)).toBe(false)
 		})

src/shared/experiments.ts

@@ -3,6 +3,7 @@ import type { AssertEqual, Equals, Keys, Values, ExperimentId } from "@roo-code/
 export const EXPERIMENT_IDS = {
 	POWER_STEERING: "powerSteering",
 	CONCURRENT_FILE_READS: "concurrentFileReads",
+	DISABLE_SLIDING_WINDOW: "disableSlidingWindow",
 } as const satisfies Record<string, ExperimentId>
 
 type _AssertExperimentIds = AssertEqual<Equals<ExperimentId, Values<typeof EXPERIMENT_IDS>>>
@@ -16,6 +17,7 @@ interface ExperimentConfig {
 export const experimentConfigsMap: Record<ExperimentKey, ExperimentConfig> = {
 	POWER_STEERING: { enabled: false },
 	CONCURRENT_FILE_READS: { enabled: false },
+	DISABLE_SLIDING_WINDOW: { enabled: false },
 }
 
 export const experimentDefault = Object.fromEntries(