Summary
Visual Studio Code 1.128, released July 8, 2026, lets a single Claude agent session hold multiple related chats so developers can compare approaches, branch from an earlier turn, and run work in parallel, each with independent history and model selection. When agents delegate to subagents, their read-only transcripts now appear as peer chats, and Copilot Vision image and PDF support became generally available.
What changed
VS Code 1.128 shipped multi-chat Claude agent sessions, workspace-less quick chats, read-only subagent transcripts in preview, deep links to specific chats, and general availability of image and PDF attachments in Chat.
Why it matters
Bringing parallel chats and visible subagent transcripts into the mainstream IDE normalizes multi-agent orchestration as an everyday developer workflow rather than a specialist feature. Read-only worker transcripts give developers oversight of delegated agent work without interrupting it, a governance pattern that matters as agents take on longer autonomous tasks.
Evidence excerpt
Claude agent sessions now support multiple related chats within one session, letting users compare approaches, branch from an earlier turn, and run work in parallel; subagent transcripts appear as read-only peer chats.