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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.307 ·

A server-controlled switch has a different built-in fallback value

The value Claude Code uses for one server-controlled switch when the server sends nothing changed from a text label to the number 8

Under the hood Internal Changes
JSON All of v2.1.307
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
InternalsArea: what it touches
Internal ChangesKind: in v2.1.307,
Internal ChangesSection of the release

Unclear Nothing shows what this switch controls, so what the new fallback changes is unknown.

What

The built-in fallback for the server-controlled switch tengu_marble_heron changed from the text "core_verb_unavailable" to the number 8. A fallback is the value Claude Code uses when Anthropic's servers send nothing for that switch. The server can still set a different value for each account.

Read from
Feature flag
tengu_marble_heron 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 v2.1.307: not a boolean we can read

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 v2.1.307. It isn't a statement about your account. What a flag value here can and cannot tell you

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtNothing shows what this switch controls, so what the new fallback changes is unknown.

See this entry in the whole of v2.1.307 →

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