Source Intelligence
Follow Discord

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 v2.1.247 Home All releases ←olderv2.1.246 v2.1.248newer→
Claude Code v2.1.247

Cloud sessions can report which worker generation they are on

Under the hood
Useful2 Signal3
Cloud Sessions not in their notes

Cloud sessions track which worker generation they're on and re-register only after a worker restart.

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 v2.1.247: on

Read once, for one account on one subscription tier, against v2.1.247. It isn't a statement about your account. What a flag value here can and cannot tell you

CLAUDE_CODE_WORKER_EPOCH--cloud
What

The startup message a session sends can now carry a worker generation number, taken from CLAUDE_CODE_WORKER_EPOCH, which changes each time the session's cloud worker restarts. A claude --cloud client that has already acknowledged one generation re-registers its device hooks and tool announcements only when the number differs.

Details
  • Optional field; emitted only on workers where the remote-tools gate tengu_violin_wood is on, and that gate falls back to off when no server value is present.
Evidence

CLAUDE_CODE_WORKER_EPOCH

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

See this entry in the whole of v2.1.247 →