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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 v2.1.227 ·

Remote model list no longer overrides the simple system prompt

Which models get the simple system prompt is now decided locally, not by remote config.

Use it now Notable No documentation found Removed
JSON All of v2.1.227
Use it nowTier: how much it should matter to you
2Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
System PromptArea: what it touches
RemovedKind: in v2.1.227,
What probably matters to youSection of the release
What

The tengu_velvet_cascade remote config, a JSON object listing models that should use the simple system prompt, is gone from the build. The choice now rests on the per-model capability entry, the CLAUDE_CODE_SIMPLE_SYSTEM_PROMPT environment variable, and the existing tengu_velvet_tide escape hatch.

Evidence

tengu_velvet_cascade

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

Read from
Feature flag
tengu_velvet_cascade 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.

tengu_velvet_tide Off in both readings

The flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.

This account: off · anonymous baseline: off · compiled default in v2.1.227: off

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 off for tengu_velvet_tide, 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_velvet_tide, 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 v2.1.227 →

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