Rate limit when starting a subtask (RooCodeInc#4453)

Co-authored-by: Daniel Riccio <[email protected]>
Co-authored-by: Matt Rubens <[email protected]>

Author: 3 people

.vscode/settings.json

@@ -9,5 +9,6 @@
 		"dist": true // set this to false to include "dist" folder in search results
 	},
 	// Turn off tsc task auto detection since we have the necessary tasks as npm scripts
-	"typescript.tsc.autoDetect": "off"
+	"typescript.tsc.autoDetect": "off",
+	"vitest.disableWorkspaceWarning": true
 }

src/core/task/Task.ts

@@ -140,9 +140,17 @@ export class Task extends EventEmitter<ClineEvents> {
 	// API
 	readonly apiConfiguration: ProviderSettings
 	api: ApiHandler
-	private lastApiRequestTime?: number
+	private static lastGlobalApiRequestTime?: number
 	private consecutiveAutoApprovedRequestsCount: number = 0
 
+	/**
+	 * Reset the global API request timestamp. This should only be used for testing.
+	 * @internal
+	 */
+	static resetGlobalApiRequestTime(): void {
+		Task.lastGlobalApiRequestTime = undefined
+	}
+
 	toolRepetitionDetector: ToolRepetitionDetector
 	rooIgnoreController?: RooIgnoreController
 	rooProtectedController?: RooProtectedController
@@ -1657,10 +1665,11 @@ export class Task extends EventEmitter<ClineEvents> {
 
 		let rateLimitDelay = 0
 
-		// Only apply rate limiting if this isn't the first request
-		if (this.lastApiRequestTime) {
+		// Use the shared timestamp so that subtasks respect the same rate-limit
+		// window as their parent tasks.
+		if (Task.lastGlobalApiRequestTime) {
 			const now = Date.now()
-			const timeSinceLastRequest = now - this.lastApiRequestTime
+			const timeSinceLastRequest = now - Task.lastGlobalApiRequestTime
 			const rateLimit = apiConfiguration?.rateLimitSeconds || 0
 			rateLimitDelay = Math.ceil(Math.max(0, rateLimit * 1000 - timeSinceLastRequest) / 1000)
 		}
@@ -1675,8 +1684,9 @@ export class Task extends EventEmitter<ClineEvents> {
 			}
 		}
 
-		// Update last request time before making the request
-		this.lastApiRequestTime = Date.now()
+		// Update last request time before making the request so that subsequent
+		// requests — even from new subtasks — will honour the provider's rate-limit.
+		Task.lastGlobalApiRequestTime = Date.now()
 
 		const systemPrompt = await this.getSystemPrompt()
 		const { contextTokens } = this.getTokenUsage()