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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 v2.1.227 ·

Model roster flag can redirect refusal fallback

The server can list models that should be routed differently when a refusal fallback happens.

Under the hood Nothing to try yet In Development
JSON All of v2.1.227
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
Model FallbackArea: what it touches
In DevelopmentKind: in v2.1.227,
In DevelopmentSection of the release

A server-supplied model roster feeding refusal fallback is empty by default, so nothing changes.

What

A new server-controlled list of model ids now feeds the logic that picks a replacement model after a refusal. Models on the list skip an early exit and are pushed down the fallback path. The list is empty unless the server supplies one, so this has no effect in a default build.

Details
  • Read from the tengu_loggia_roster flag as a JSON array of model ids; anything else logs "is not a JSON array of model ids; treating it as empty" and falls back to an empty list.
Evidence

tengu_loggia_roster

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

Read from
Feature flag
tengu_loggia_roster 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 v2.1.227: 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 v2.1.227. 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 [] for tengu_loggia_roster, 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_loggia_roster, 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 →

How sure we are
One source agreesOne thing we can check says the same as this entry.
The name it cites is new in this buildNew in this build: tengu_loggia_roster

See this entry in the whole of v2.1.227 →

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