Definition

Parallel agent sessions allow multiple independent AI coding conversations within a single agent-host workspace — enabling compare-and-branch workflows, concurrent task execution, and fork-from-turn exploration without opening separate IDE windows.

Key Points

  • 2026-07-08: visual-studio-code 1.128 ships native multi-chat for Claude agent-host sessions powered by Anthropic Claude Agent SDK (2026-07-12-vscode-1-128-official-release-notes)
  • Each peer chat maintains independent history, title, and model selection; restores with parent session
  • Fork-from-turn creates alternative implementation branches from specific conversation points
  • Read-only subagent monitoring for delegated workstreams
  • Marks shift from serial single-thread agent UX to parallel agentic IDE workflows

Sources