smol

.changeset/clean-beers-clean.md

@@ -0,0 +1,5 @@
+---
+"claude-dev": minor
+---
+
+add ability to constrain size of terminal output

proto/state.proto

@@ -96,6 +96,7 @@ message UpdateSettingsRequest {
   optional bool terminal_reuse_enabled = 9;
   optional bool mcp_responses_collapsed = 10;
   optional bool mcp_rich_display_enabled = 11;
+  optional int64 terminal_output_line_limit = 12;
 }
 
 // Complete API Configuration message

src/core/controller/index.ts

@@ -135,6 +135,7 @@ export class Controller {
 			chatSettings,
 			shellIntegrationTimeout,
 			terminalReuseEnabled,
+			terminalOutputLineLimit,
 			defaultTerminalProfile,
 			enableCheckpointsSetting,
 			isNewUser,
@@ -171,6 +172,7 @@ export class Controller {
 			chatSettings,
 			shellIntegrationTimeout,
 			terminalReuseEnabled ?? true,
+			terminalOutputLineLimit ?? 500,
 			defaultTerminalProfile ?? "default",
 			enableCheckpointsSetting ?? true,
 			task,
@@ -959,6 +961,7 @@ export class Controller {
 			defaultTerminalProfile,
 			isNewUser,
 			mcpResponsesCollapsed,
+			terminalOutputLineLimit,
 		} = await getAllExtensionState(this.context)
 
 		const localClineRulesToggles =
@@ -1006,6 +1009,7 @@ export class Controller {
 			defaultTerminalProfile,
 			isNewUser,
 			mcpResponsesCollapsed,
+			terminalOutputLineLimit,
 		}
 	}
 

src/core/controller/state/updateSettings.ts

@@ -74,6 +74,11 @@ export async function updateSettings(controller: Controller, request: UpdateSett
 			await controller.context.globalState.update("terminalReuseEnabled", request.terminalReuseEnabled)
 		}
 
+		// Update terminal output line limit
+		if (request.terminalOutputLineLimit !== undefined) {
+			await controller.context.globalState.update("terminalOutputLineLimit", Number(request.terminalOutputLineLimit))
+		}
+
 		// Post updated state to webview
 		await controller.postStateToWebview()
 

src/core/storage/state-keys.ts

@@ -69,6 +69,7 @@ export type GlobalStateKey =
 	| "terminalReuseEnabled"
 	| "defaultTerminalProfile"
 	| "isNewUser"
+	| "terminalOutputLineLimit"
 	| "mcpRichDisplayEnabled"
 
 export type LocalStateKey =

src/core/storage/state.ts

@@ -238,6 +238,7 @@ export async function getAllExtensionState(context: vscode.ExtensionContext) {
 		mcpResponsesCollapsedRaw,
 		globalWorkflowToggles,
 		terminalReuseEnabled,
+		terminalOutputLineLimit,
 		defaultTerminalProfile,
 	] = await Promise.all([
 		getGlobalState(context, "isNewUser") as Promise<boolean | undefined>,
@@ -303,6 +304,7 @@ export async function getAllExtensionState(context: vscode.ExtensionContext) {
 		getGlobalState(context, "mcpResponsesCollapsed") as Promise<boolean | undefined>,
 		getGlobalState(context, "globalWorkflowToggles") as Promise<ClineRulesToggles | undefined>,
 		getGlobalState(context, "terminalReuseEnabled") as Promise<boolean | undefined>,
+		getGlobalState(context, "terminalOutputLineLimit") as Promise<number | undefined>,
 		getGlobalState(context, "defaultTerminalProfile") as Promise<string | undefined>,
 	])
 
@@ -501,6 +503,7 @@ export async function getAllExtensionState(context: vscode.ExtensionContext) {
 		enableCheckpointsSetting: enableCheckpointsSetting,
 		shellIntegrationTimeout: shellIntegrationTimeout || 4000,
 		terminalReuseEnabled: terminalReuseEnabled ?? true,
+		terminalOutputLineLimit: terminalOutputLineLimit ?? 500,
 		defaultTerminalProfile: defaultTerminalProfile ?? "default",
 		globalWorkflowToggles: globalWorkflowToggles || {},
 	}

src/core/task/index.ts

@@ -204,6 +204,7 @@ export class Task {
 		chatSettings: ChatSettings,
 		shellIntegrationTimeout: number,
 		terminalReuseEnabled: boolean,
+		terminalOutputLineLimit: number,
 		defaultTerminalProfile: string,
 		enableCheckpointsSetting: boolean,
 		task?: string,
@@ -224,6 +225,7 @@ export class Task {
 		this.terminalManager = new TerminalManager()
 		this.terminalManager.setShellIntegrationTimeout(shellIntegrationTimeout)
 		this.terminalManager.setTerminalReuseEnabled(terminalReuseEnabled ?? true)
+		this.terminalManager.setTerminalOutputLineLimit(terminalOutputLineLimit)
 		this.terminalManager.setDefaultTerminalProfile(defaultTerminalProfile)
 		this.urlContentFetcher = new UrlContentFetcher(context)
 		this.browserSession = new BrowserSession(context, browserSettings)
@@ -1477,9 +1479,9 @@ export class Task {
 			chunkTimer = setTimeout(async () => await flushBuffer(), CHUNK_DEBOUNCE_MS)
 		}
 
-		let result = ""
+		const outputLines: string[] = []
 		process.on("line", async (line) => {
-			result += line + "\n"
+			outputLines.push(line)
 
 			if (!didContinue) {
 				outputBuffer.push(line)
@@ -1521,7 +1523,7 @@ export class Task {
 		// grouping command_output messages despite any gaps anyways)
 		await setTimeoutPromise(50)
 
-		result = result.trim()
+		let result = this.terminalManager.processOutput(outputLines)
 
 		if (userFeedback) {
 			await this.say("user_feedback", userFeedback.text, userFeedback.images, userFeedback.files)

src/integrations/terminal/TerminalManager.ts

@@ -96,6 +96,7 @@ export class TerminalManager {
 	private disposables: vscode.Disposable[] = []
 	private shellIntegrationTimeout: number = 4000
 	private terminalReuseEnabled: boolean = true
+	private terminalOutputLineLimit: number = 500
 	private defaultTerminalProfile: string = "default"
 
 	constructor() {
@@ -327,6 +328,20 @@ export class TerminalManager {
 		this.terminalReuseEnabled = enabled
 	}
 
+	setTerminalOutputLineLimit(limit: number): void {
+		this.terminalOutputLineLimit = limit
+	}
+
+	public processOutput(outputLines: string[]): string {
+		if (outputLines.length > this.terminalOutputLineLimit) {
+			const halfLimit = Math.floor(this.terminalOutputLineLimit / 2)
+			const start = outputLines.slice(0, halfLimit)
+			const end = outputLines.slice(outputLines.length - halfLimit)
+			return `${start.join("\n")}\n... (output truncated) ...\n${end.join("\n")}`.trim()
+		}
+		return outputLines.join("\n").trim()
+	}
+
 	setDefaultTerminalProfile(profileId: string): { closedCount: number; busyTerminals: TerminalInfo[] } {
 		// Only handle terminal change if profile actually changed
 		if (this.defaultTerminalProfile === profileId) {

src/shared/ExtensionMessage.ts

@@ -91,6 +91,7 @@ export interface ExtensionState {
 	telemetrySetting: TelemetrySetting
 	shellIntegrationTimeout: number
 	terminalReuseEnabled?: boolean
+	terminalOutputLineLimit: number
 	defaultTerminalProfile?: string
 	uriScheme?: string
 	userInfo?: {

webview-ui/src/components/settings/SettingsView.tsx

@@ -130,6 +130,8 @@ const SettingsView = ({ onDone, targetSection }: SettingsViewProps) => {
 		setMcpRichDisplayEnabled,
 		shellIntegrationTimeout,
 		setShellIntegrationTimeout,
+		terminalOutputLineLimit,
+		setTerminalOutputLineLimit,
 		terminalReuseEnabled,
 		setTerminalReuseEnabled,
 		defaultTerminalProfile,
@@ -151,6 +153,7 @@ const SettingsView = ({ onDone, targetSection }: SettingsViewProps) => {
 		chatSettings,
 		shellIntegrationTimeout,
 		terminalReuseEnabled,
+		terminalOutputLineLimit,
 		defaultTerminalProfile,
 	})
 	const [apiErrorMessage, setApiErrorMessage] = useState<string | undefined>(undefined)
@@ -194,6 +197,7 @@ const SettingsView = ({ onDone, targetSection }: SettingsViewProps) => {
 						? convertApiConfigurationToProtoApiConfiguration(apiConfigurationToSubmit)
 						: undefined,
 					chatSettings: chatSettings ? convertChatSettingsToProtoChatSettings(chatSettings) : undefined,
+					terminalOutputLineLimit,
 				}),
 			)
 
@@ -211,10 +215,12 @@ const SettingsView = ({ onDone, targetSection }: SettingsViewProps) => {
 				planActSeparateModelsSetting,
 				enableCheckpointsSetting,
 				mcpMarketplaceEnabled,
+				mcpRichDisplayEnabled,
 				mcpResponsesCollapsed,
 				chatSettings,
 				shellIntegrationTimeout,
 				terminalReuseEnabled,
+				terminalOutputLineLimit,
 				defaultTerminalProfile,
 			}
 		} catch (error) {
@@ -244,6 +250,7 @@ const SettingsView = ({ onDone, targetSection }: SettingsViewProps) => {
 			mcpResponsesCollapsed !== originalState.current.mcpResponsesCollapsed ||
 			JSON.stringify(chatSettings) !== JSON.stringify(originalState.current.chatSettings) ||
 			shellIntegrationTimeout !== originalState.current.shellIntegrationTimeout ||
+			terminalOutputLineLimit !== originalState.current.terminalOutputLineLimit ||
 			terminalReuseEnabled !== originalState.current.terminalReuseEnabled ||
 			defaultTerminalProfile !== originalState.current.defaultTerminalProfile
 
@@ -259,6 +266,7 @@ const SettingsView = ({ onDone, targetSection }: SettingsViewProps) => {
 		chatSettings,
 		shellIntegrationTimeout,
 		terminalReuseEnabled,
+		terminalOutputLineLimit,
 		defaultTerminalProfile,
 	])
 
@@ -300,6 +308,9 @@ const SettingsView = ({ onDone, targetSection }: SettingsViewProps) => {
 				if (typeof setShellIntegrationTimeout === "function") {
 					setShellIntegrationTimeout(originalState.current.shellIntegrationTimeout)
 				}
+				if (typeof setTerminalOutputLineLimit === "function") {
+					setTerminalOutputLineLimit(originalState.current.terminalOutputLineLimit)
+				}
 				if (typeof setTerminalReuseEnabled === "function") {
 					setTerminalReuseEnabled(originalState.current.terminalReuseEnabled ?? true)
 				}

webview-ui/src/components/settings/TerminalOutputLineLimitSlider.tsx

@@ -0,0 +1,38 @@
+import React from "react"
+import { useExtensionState } from "@/context/ExtensionStateContext"
+
+const TerminalOutputLineLimitSlider: React.FC = () => {
+	const { terminalOutputLineLimit, setTerminalOutputLineLimit } = useExtensionState()
+
+	const handleSliderChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+		const value = parseInt(event.target.value, 10)
+		setTerminalOutputLineLimit(value)
+	}
+
+	return (
+		<div style={{ marginBottom: 15 }}>
+			<label htmlFor="terminal-output-limit" style={{ fontWeight: "500", display: "block", marginBottom: 5 }}>
+				Terminal output limit
+			</label>
+			<div style={{ display: "flex", alignItems: "center" }}>
+				<input
+					type="range"
+					id="terminal-output-limit"
+					min="100"
+					max="5000"
+					step="100"
+					value={terminalOutputLineLimit ?? 500}
+					onChange={handleSliderChange}
+					style={{ flexGrow: 1, marginRight: "1rem" }}
+				/>
+				<span>{terminalOutputLineLimit ?? 500}</span>
+			</div>
+			<p style={{ fontSize: "12px", color: "var(--vscode-descriptionForeground)", margin: "5px 0 0 0" }}>
+				Maximum number of lines to include in terminal output when executing commands. When exceeded, lines will be
+				removed from the middle, saving tokens.
+			</p>
+		</div>
+	)
+}
+
+export default TerminalOutputLineLimitSlider

webview-ui/src/components/settings/TerminalSettingsSection.tsx

@@ -1,6 +1,7 @@
 import React, { useState, useEffect } from "react"
 import { VSCodeTextField, VSCodeCheckbox, VSCodeDropdown, VSCodeOption } from "@vscode/webview-ui-toolkit/react"
 import { useExtensionState } from "@/context/ExtensionStateContext"
+import TerminalOutputLineLimitSlider from "./TerminalOutputLineLimitSlider"
 import { StateServiceClient } from "../../services/grpc-client"
 import { Int64, Int64Request } from "@shared/proto/common"
 
@@ -133,6 +134,7 @@ export const TerminalSettingsSection: React.FC = () => {
 					this if you experience issues with task lockout after a terminal command.
 				</p>
 			</div>
+			<TerminalOutputLineLimitSlider />
 		</div>
 	)
 }

webview-ui/src/context/ExtensionStateContext.tsx

@@ -64,6 +64,7 @@ interface ExtensionStateContextType extends ExtensionState {
 	setMcpResponsesCollapsed: (value: boolean) => void
 	setShellIntegrationTimeout: (value: number) => void
 	setTerminalReuseEnabled: (value: boolean) => void
+	setTerminalOutputLineLimit: (value: number) => void
 	setDefaultTerminalProfile: (value: string) => void
 	setChatSettings: (value: ChatSettings) => void
 	setMcpServers: (value: McpServer[]) => void
@@ -194,6 +195,7 @@ export const ExtensionStateContextProvider: React.FC<{
 		globalWorkflowToggles: {},
 		shellIntegrationTimeout: 4000,
 		terminalReuseEnabled: true,
+		terminalOutputLineLimit: 500,
 		defaultTerminalProfile: "default",
 		isNewUser: false,
 		mcpResponsesCollapsed: false, // Default value (expanded), will be overwritten by extension state
@@ -752,6 +754,11 @@ export const ExtensionStateContextProvider: React.FC<{
 				...prevState,
 				terminalReuseEnabled: value,
 			})),
+		setTerminalOutputLineLimit: (value) =>
+			setState((prevState) => ({
+				...prevState,
+				terminalOutputLineLimit: value,
+			})),
 		setDefaultTerminalProfile: (value) =>
 			setState((prevState) => ({
 				...prevState,