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 v2.1.248 Home All releases olderv2.1.247 v2.1.250newer
Claude Code v2.1.248

CLAUDE_CODE_ENABLE_AUTO_MODE is no longer required, or read at all

You'll notice
Useful4 Signal4
Auto Mode Notable

Auto mode no longer needs CLAUDE_CODE_ENABLE_AUTO_MODE; setting it now does nothing at all.

Feature flag
tengu_auto_mode_config 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 v2.1.248: not a boolean we can read

Read once, for one account on one subscription tier, against v2.1.248. It isn't a statement about your account. What a flag value here can and cannot tell you

disableAutoMode
What

2.1.247 refused auto mode on non-first-party providers with "auto mode requires CLAUDE_CODE_ENABLE_AUTO_MODE=1". That check is gone. The variable now survives only as a name in the environment-variable registry and is read nowhere in this build, so setting it does nothing. Auto mode can now be turned off by the disableAutoMode setting, by the remote tengu_auto_mode_config (built-in default enabled), by model support, or by the new fast-mode breaker.

Details
  • The fast-mode breaker surfaces to you as "auto mode unavailable while fast mode is on ยท run /fast off".
Evidence

auto mode unavailable while fast mode is on \xB7 run /fast off

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 v2.1.248 →