VS Code: Sessions Hardening and a Startup Performance Fix
The Agents Window sessions feature dominated today's activity with a wave of reliability and UX fixes, while a separate change to the built-in extensions cache promises a major startup speedup by fixing a bug that made every window rescan all extensions from scratch.
Duration: PT2M42S
Episode overview
This episode is a short developer briefing from VS Code.
It explains recent repository work in plain language.
- Show: VS Code
- Published: 2026-09-18T13:06:54Z
- Audio duration: PT2M42S
Transcript excerpt
This excerpt keeps the crawler page concise. Listen to the episode or use the RSS feed for the full update.
Good morning. It's September 18th, and this is your VS Code briefing.
The dominant story today is sessions — the Agents Window feature is getting heavy investment, with a cluster of fixes addressing focus, visibility, and state bugs that emerged as the feature matures. The second story is a quiet but significant performance win: builtin extensions were being rescanned on every startup…
On sessions: chris marti's PR 336720 fixes a focus race during background session replacement, which was causing intermittent test timeouts on WSL Dev Container smoke tests — a good reminder that flaky CI often points to real races. Related work, PR 336573, extends Dev Container support into WSL folders, and PR…
On performance: Dmitriy Vasyura's PR 336383 fixes builtin extension manifest caching. The cache key included scan language, but the cache file name didn't — so the window and shared process silently overwrote each other's cache files, forcing a full rescan of about 96 extensions on every launch. Measured…
Other notable fixes: a memory leak in signature help caching (commit 7828363), and a fix preserving inline file references in chat when editing text before them (PR 333965).
What's next:…
Nearby episodes from VS Code
- Sessions Reliability Push
- Agent Sessions Get Sturdier
- Agents Window Hardens Its Remote Story
- Build Pipeline Overhaul and Chat Session Polish
- Weekly Recap - Agent Sessions Get a Stability Pass
- Memory Leaks, Race Conditions, and Terminal Hardening
- Agents Window Takes Shape, Editor Surfaces Get Polished
- Agents Window Stabilization Push