VS Code: Chat Scale Fixes, Sandbox Hardening, and Editor Parity
Long agent chats get faster and more accurate, sandbox and merge handling gets stricter, and the Markdown editor finally matches preview. The main pattern is reliability at scale across chat and agent hosting.
Duration: PT2M35S
Episode overview
This episode is a short developer briefing from VS Code.
It explains recent repository work in plain language.
- Show: VS Code
- Published: 2026-10-27T13:08:30Z
- Audio duration: PT2M35S
Transcript excerpt
This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.
Hello, it's Tuesday, October 27th, 2026, and this is your VS Code briefing.
The lead signal today: the team is making hundred-turn agent chats cheap to render and harder to confuse, while tightening how sandboxed agents and cloud artifacts behave.
First, chat at scale. PR 344524 rebuilds a turn's changed-file summary lazily from a shared pool instead of eagerly building every list while collapsed. That cuts thousands of global listeners in long sessions and preserves expanded state when turns rebuild. Related, PR 344490 keeps background terminal notifications…
Second, sandbox and agent host correctness. PR 344450 gives plugin directories read-only access inside the SDK sandbox so hook scripts load without widening permissions. PR 344462 removes the masked environment variables setting because it wasn't implemented, preventing false confidence. PR 344460 renders sandbox…
Third, editor parity and faster CI. PRs 344399 and 344533 move Mermaid blocks in the experimental Markdown editor onto the preview's renderer, bringing theme mapping, natural sizing, height caps, and resizability together. Commit 9084252 stops the terminal from sending Control U into PowerShell, and PR 344428…
What's…
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