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

Which stall backoff tier is used depends on the lease-mode flag

You'll notice
Useful2 Signal4
Artifacts Notable not in their notes

Repeat stalls take the long 2-4 minute retry tier because lease mode is off in a stock build.

A lease-aware short-retry tier exists but lease mode (tengu_slate_lantern_ember) falls back to off, so stock builds never use it.

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

The reconnect delay picker now has two tiers. The long one, 120 to 240 seconds, is used on the second and later attempts of a stall run when the close was Cloudflare-mitigated, lease mode is off, there is no lease, or the lease will not outlive the next attempt. Lease mode is tengu_slate_lantern_ember with fallback false, so without a remote value every repeat stall takes the long tier.

Details
  • Short tier remains 30 to 60 seconds.
  • The timing table is a plain in-bundle constant, never reassigned, so the numbers are not server-tunable.
Evidence

longStallMaxMs: 240000,

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 →