🏗️ Architecture: How to implement parallel task execution for Computer Use?

Date: 2026-02-24
Time: 20:48:22 UTC
Session: gspace1-138.19
Agent: backend
Confidence: 92%
Status: ✅ Documented

📋 Decision Context

Question:

How to implement parallel task execution for Computer Use?

Task: Session 140: Parallel task execution for Computer Use

🎯 Decision Made

Chosen:

Per-session sandbox isolation + in-memory concurrency gate + batch endpoint + multi-goal frontend form

Options Considered:

• No alternatives documented

💭 Reasoning

Changed E2B sandbox map key from userId to sessionId so parallel sessions get isolated Firecracker VMs (no desktop action conflicts). Added configurable concurrency limits (20/user, 50 global) via env vars. Batch endpoint accepts up to 10 goals, returns partial success. Frontend multi-goal form supports up to 5 parallel goals. No BullMQ needed (not wired in backend-ai-api, in-memory gate sufficient for single-process). Fixed broken TaskBridgeService.submitParallelTasks() with forkJoin.

📁 Files Involved

• apis/backend-ai-api/src/app/infrastructure/services/e2b-desktop.service.ts
• apis/backend-ai-api/src/app/infrastructure/services/computer-use-loop.service.ts
• apis/backend-ai-api/src/app/infrastructure/controllers/computer-use.controller.ts
• libs/libs-ai/vitto-hub/src/lib/services/vitto-api.service.ts
• libs/libs-ai/vitto-chat/src/lib/services/task-bridge.service.ts
• libs/libs-ai/vitto-hub/src/lib/components/computer-use-panel/computer-use-panel.component.ts
• libs/libs-ai/vitto-hub/src/lib/components/computer-use-panel/computer-use-panel.component.html
• apis/backend-vitto-api/src/app/connectivity/infrastructure-client.service.ts
• docs/english/Plans/self-hosted-e2b.plan.md

🔗 Related

• Decision ID: dev_1771966102809_2gbewe1
• Session: 138
• Workspace: gspace1

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