VS Code 1.128 dropped on July 8 and it draws a line. Microsoft is no longer treating VS Code as an editor with AI bolted on the side. The headline feature — multi-chat agent sessions — lets you run parallel Claude conversations inside a single window, fork threads at any turn, and monitor subagents in read-only view. Browser tools are now generally available and on by default. Copilot Vision (images and PDFs in chat) graduates from preview to GA. And OS-level keyboard shortcuts let you summon the Agents window without switching apps.
Parallel Agent Sessions: The Shift That Changes How You Work
The core change in 1.128 is straightforward to describe and significant to absorb. Claude agent-host sessions in the Agents window now support multiple chats per session. Each chat keeps its own history, title, and model selection. Peer chats stay grouped under the parent session rather than spawning independent top-level sessions, and they restore together after restart.
In practice, this means you can run your implementation work in one chat, your test generation in another, and your documentation in a third — all under the same session umbrella, simultaneously. If you want to explore a different approach midway through, you fork a chat from an earlier turn. Neither thread loses its context. You switch between them with ⇧⌘[ and ⇧⌘].
Before 1.128, AI coding was fundamentally serial. You waited for the agent to finish one task before starting the next, or you juggled separate sessions with no shared context.
Quick chats (⌘K ⌘N) let you ask one-off questions without opening a workspace at all.
Subagent Monitoring: Watch Without Interfering
When an agent delegates work to subagents, those worker transcripts now appear as read-only peer chats. They are hidden from the tab strip by default; you open them from the Conversations menu, the running-subagents chip, or an inline subagent pill in the parent transcript.
The view-only nature is intentional. You can see exactly what each worker is doing without accidentally steering or interrupting it.
Browser Tools: The Agentic Loop Closes
Browser tools for GitHub Copilot went GA on July 1 and 1.128 enables them by default for all paid Copilot subscribers. Agents can now navigate to a URL, click through a live application, read page content and console errors, take screenshots, and verify that code actually works — without you leaving the editor.
Privacy controls: existing tabs are private by default; agents only access pages you explicitly share. Agent-opened pages run in isolated sessions with no access to your cookies or stored data. Parallel agents maintain separate browser contexts. High-risk browser capabilities require explicit per-site approval. Enterprise admins get domain filtering and workspace trust controls.
Copilot Vision and System-Wide Shortcuts
Image and PDF support in Chat is now generally available. Attach files by pasting, dragging, or dropping — or let agents access images directly through tool calls.
OS-level keyboard shortcuts: add "systemWide": true to any keybinding in keybindings.json and that shortcut fires even when VS Code is not in focus.
The Verdict
VS Code 1.128 is not a features release — it is a workflow release. The parallel sessions model is the one that changes the mental model for AI-assisted development. You are no longer waiting on one agent at a time; you are orchestrating a small team. Combined with browser-verified output and visible subagent work, the IDE is doing something qualitatively different from what it did six months ago.