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 v2.1.228 Home All releases olderv2.1.227 v2.1.229newer
Claude Code v2.1.228

Remote-control heartbeat and stale-epoch recovery, all off

Not switched on
Useful2 Signal3
Remote Control

Remote sessions gain reconnect and reactivation heartbeats plus stale-connection recovery, all off here.

Three remote-control behaviours sit behind gates that all fall back to false.

Feature flag
tengu_ccr_reconnect_beat On for this account, and not off by default

The flag server returned on for the one account this site reads, and nothing in this release compiles it off by default. The compiled default is shown below, and says which it is when we cannot read one: a fifth of gates compile in a string or a number rather than on or off, and most published releases have no gate table behind them at all. No client can see what the server returns for your account.

This account: on · anonymous baseline: on · compiled default in v2.1.228: on

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.

tengu_ccr_reactivation_beat On for this account, and not off by default

The flag server returned on for the one account this site reads, and nothing in this release compiles it off by default. The compiled default is shown below, and says which it is when we cannot read one: a fifth of gates compile in a string or a number rather than on or off, and most published releases have no gate table behind them at all. No client can see what the server returns for your account.

This account: on · anonymous baseline: on · compiled default in v2.1.228: on

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.

tengu_bridge_recover_stale_epoch Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.228: on

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 v2.1.228. It isn't a statement about your account. What a flag value here can and cannot tell you

What

Three new remote-control behaviours were added behind server-side flags: a beat on reconnect (tengu_ccr_reconnect_beat), a beat on reactivation (tengu_ccr_reactivation_beat) and recovery from a stale connection epoch (tengu_bridge_recover_stale_epoch). All three fall back to false in this build, so they are on only if server config says so.

Details
  • The client's liveness option was renamed to advertise heartbeat-probe support.
  • An idle tracker is now passed into the client and fed by user-driven inbound traffic: user messages from the remote worker, successful control responses, and bash commands.
Evidence

tengu_ccr_reactivation_beat

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

See this entry in the whole of v2.1.228 →