Source Intelligence

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v2.1.239 Home All releases olderv2.1.238 v2.1.240newer
Claude Code v2.1.239

Chrome tabs opened by a session are closed when it ends

You'll notice
Useful3 Signal3
Browser

Chrome tabs a session opened are closed when you leave it, unless they hold real content.

Feature flag
tengu_chrome_tab_group_close Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.239: off

Read once, for one account on one subscription tier, against v2.1.239. It isn't a statement about your account. What a flag value here can and cannot tell you

What

When you switch away from a session or exit, Claude Code now asks the browser bridge for that session's tab group and closes its tabs. It keeps the group if any tab has real content, if the tab list cannot be read, or if the group holds more tabs than a cap. This is on by default (tengu_chrome_tab_group_close, fallback true) and skipped entirely in remote sessions.

Details
  • A tab counts as content unless it is a new tab or a blank page; one such tab keeps the whole group open.
  • Telemetry event chrome_tab_group_close records the outcomes over_cap, tabs_unreadable and close_failed.
  • Skipped when the environment variable CLAUDE_CODE_REMOTE_SESSION_ID is set.
Evidence

tengu_chrome_tab_group_close

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.239 →