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

The sync action is wired up but compiled out of this build

Not switched on
Useful2 Signal4
Artifacts

The artifact sync action is routed everywhere but compiled out of this build.

Asking for sync returns "sync is not available in this build"; no flag can enable it.

What

Although permission checks, result rendering and the action list all route sync through, the two modules that implement it are compiled to nothing in this build, so the action is never offered and cannot be used. There is no flag to turn it on; it is a build-time exclusion, and asking for it returns "sync is not available in this build".

Details
  • Both module handles are constants set to null, and a neighbouring stub reports that artifact rooms are not compiled into this build.
  • Because those handles are null, the live-edit gate check that would advertise sync is never reached.
  • None of this handling exists in the previous release, so the action is entirely new.
Evidence

sync is not available in this build

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

See this entry in the whole of v2.1.248 →