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 v2.1.227 Home All releases olderv2.1.226 v2.1.228newer
Claude Code v2.1.227

Hook for syncing a worker directory around each headless turn

Not switched on
Useful1 Signal3
Headless Mode

Headless runs can sync a worker directory before and after each turn, if the host provides a callback.

A per-turn sync callback in the headless loop is accepted but nothing in the CLI supplies one.

What

The headless streaming loop accepts an optional callback that runs before each turn and again after it, receiving the message IDs from that turn. It only runs when the embedding caller supplies one, and nothing in the CLI itself does.

Evidence

workerDirSync

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 v2.1.227 →