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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.250 ·

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

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

You'll notice Notable Nothing to try yet No documentation found In Development
JSON All of v2.1.250
You'll noticeTier: how much it should matter to you
2Useful: my rating, 1 to 5
4Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
In DevelopmentKind: in v2.1.250,
What probably matters to youSection of the release

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

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.

Read from
Names in the bundletengu_slate_lantern_ember
Feature flag
tengu_slate_lantern_ember Off by default, switched on for this account

The shipped code defaults this off, and the flag server returned on for the one account this site reads on this version. That is the reading that makes the entry above worth a second look, and it still says nothing about your account.

This account: on · anonymous baseline: on · compiled default in v2.1.250: off

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

What has happened since
Flag reading moved The flag server now returns on for tengu_slate_lantern_ember, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.
Flag reading moved The flag server now returns nothing at all, having stopped carrying it for tengu_slate_lantern_ember, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.

See this across every release →

See this entry in the whole of v2.1.250 →

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