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 v2.1.232 Home All releases olderv2.1.231 v2.1.233newer
Claude Code v2.1.232

Bash tool description shape is decided once per process

Under the hood
Useful1 Signal2
Tools not in their notes

The Bash tool's description length is decided once per process so it can't change mid-session.

Feature flag
tengu_thrifty_sonic On for this account, and not off by default

The flag server returned on for the one account this site reads, and nothing in this release compiles it off by default. The compiled default is shown below, and says which it is when we cannot read one: a fifth of gates compile in a string or a number rather than on or off, and most published releases have no gate table behind them at all. No client can see what the server returns for your account.

This account: on · anonymous baseline: on · compiled default in v2.1.232: not a boolean we can read

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.232. It isn't a statement about your account. What a flag value here can and cannot tell you

CLAUDE_CODE_THRIFTY_SONIC
What

Whether the Bash tool shows its shortened description is now worked out once and remembered for the life of the process, so it cannot change shape mid-session if the underlying value moves. The gate itself is unchanged: tengu_thrifty_sonic, off by default, overridable with the CLAUDE_CODE_THRIFTY_SONIC environment variable.

Evidence

bashFirstDescriptionTrimmed

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 v2.1.232 →