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 v2.1.238 Home All releases olderv2.1.237 v2.1.239newer
Claude Code v2.1.238

Silent-turn and artifact-room env vars added to an internal allowlist

Use it now
Useful3 Signal4
Environment Variables Notable not in their notes

Silent-turn reminder and artifact room environment variables are now recognised by name in the settings allowlist.

Feature flag
tengu_hushed_lark 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 v2.1.238: not a boolean we can read

tengu_hushed_lark_text 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 v2.1.238: not a boolean we can read

Read once, for one account on one subscription tier, against v2.1.238. It isn't a statement about your account. What a flag value here can and cannot tell you

CLAUDE_CODE_SILENT_TURN_REMINDERCLAUDE_CODE_SILENT_TURN_REMINDER_TURNSCLAUDE_CODE_SILENT_TURN_REMINDER_TEXTCLAUDE_CODE_ARTIFACT_ROOM
What

CLAUDE_CODE_SILENT_TURN_REMINDER, CLAUDE_CODE_SILENT_TURN_REMINDER_TURNS, CLAUDE_CODE_SILENT_TURN_REMINDER_TEXT and CLAUDE_CODE_ARTIFACT_ROOM joined a set of recognised environment variables that already held entries such as CLAUDE_CODE_HARBOR_KITE and USER_TYPE.

Details
  • The feature itself predates this build. The turn count comes from the tengu_hushed_lark flag with a default of 5, the reminder text from tengu_hushed_lark_text, and whether it runs at all from a per-model silent_turn_reminder check. Each is overridable by the matching env var.
Evidence

CLAUDE_CODE_SILENT_TURN_REMINDER_TURNS

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 v2.1.238 →