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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 ·

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

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

You'll notice Notable No documentation found In Development
JSON All of v2.1.250
You'll noticeTier: how much it should matter to you
3Useful: 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
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.

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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