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 v2.1.250 Home All releases olderv2.1.248
Claude Code v2.1.250

Long-stall backoff band and randomised give-up window for live watches

You'll notice
Useful3 Signal4
Artifacts Notable not in their notes

Stalled watches now wait 2-4 minutes between retries and give up at a random point between 30 and 45 minutes.

Feature flag
tengu_slate_lantern_ember 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 v2.1.250: on

Read once, for one account on one subscription tier, against v2.1.250. It isn't a statement about your account. What a flag value here can and cannot tell you

tengu_slate_lantern_ember
What

Repeated reconnect stalls now back off 2 to 4 minutes instead of 30 to 60 seconds, and a stalling watch gives up somewhere between 30 and 45 minutes rather than at exactly 30, so clients in one outage do not all abandon at the same moment. The long band is picked when a stall repeats and either the connection was closed by Cloudflare mitigation or lease mode is off, and lease mode (tengu_slate_lantern_ember) defaults to off, so a stock build takes the long band.

Details
  • New timing constants: longStallMinMs: 120000, longStallMaxMs: 240000, stallOutJitterMs: 900000.
  • Give-up deadline is now per run: maxStallMs plus a random amount up to the jitter.
  • A counter event fires once per stall run carrying a startup flag and, when known, http_status.
  • The numbers are compiled in and copied into state; nothing in this build overrides them remotely.
Evidence

stallOutJitterMs, stall_run_started

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

See this entry in the whole of v2.1.250 →