Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.277 ·

New 'sync at attach' flow pulls a peer's files as soon as it joins a session

When a peer joins a cloud/dir-sync session it can now pull the other side's files immediately, behind capability and account gating

TierNothing to try yethow much it should matter to you
Useful3my rating, 1 to 5
Signal3worth watching, 1 to 5
AreaDirectory Syncwhat it touches
KindIn Developmentin v2.1.277,
Group of 2 Nothing to try yet No documentation found

When a peer joins a cloud/dir-sync session it can now pull the other side's files immediately, behind capability and account gating

What

When a peer attaches to a cloud or directory-sync session, Claude Code can now offer to sync files right away instead of waiting for the normal push/pull cycle:

  • If the peer advertises the sync_at_attach capability and a local check passes, the new flow calls the peer's attachOffer()/pullPoint() to pull the peer's files into the local session before the usual sync cycle runs.
  • The local check requires the account gate tengu_violin_soundpost and the broader remote-tools gate tengu_violin_wood to both be enabled.
  • The flow emits the telemetry event tengu_dir_sync_attach_offer and counters under ccr_dir_sync_attach.

Why

This lets a newly attached peer get an up-to-date copy of files sooner, rather than waiting for the regular sync cycle, while keeping the behavior behind capability negotiation and account gates so it only activates where supported and enabled.

Read from
Names in the bundletengu_violin_soundposttengu_violin_wood
Feature flag
tengu_violin_wood Off in both readings

The flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.

This account: off · anonymous baseline: off · compiled default in v2.1.277: off

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 v2.1.277. It isn't a statement about your account. What a flag value here can and cannot tell you

How sure we are
One source agreesOne thing we can check says the same as this entry.
The name it cites is new in this buildNew in this build: tengu_violin_soundpost

See this entry in the whole of v2.1.277 →