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

Announce handling validates the frame and answers with a specific reason when switched off

Under the hood
Useful1 Signal3
Remote Tools

Tool announcements from an attached machine are size-checked and answered with a precise refusal reason.

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

What

Announcements from an attached machine are checked for nesting depth, a 1 MiB size cap, schema, host description and worker epoch, then judged against two switches. If the account flags have not arrived yet the answer asks for a retry, after waiting at most 5 seconds; if the flag is off the registry is cleared and the answer is remote_tools_disabled: flag_off; a closed session channel answers session_channel_off.

Details
  • The account flag is tengu_violin_wood, compiled in as off, so with no server value every announce is answered as disabled.
  • The flag wait is capped by flagWaitCapMs: 5000.
  • Successful announcements and withdrawals log tengu_remote_tools_announce with the outcome, counts of served, ignored, passthrough and plumbing tools, and whether another client instance was displaced.
Evidence

remote_tools_not_ready: feature flags not yet available; retry

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 v2.1.247 →