Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.271 ·

New 'sleepy_snowflake' reminder-scope control per model/conversation

New 'sleepy_snowflake' setting controls how widely kept reminders are delivered, per model and conversation

TierNothing to try yethow much it should matter to you
Useful3my rating, 1 to 5
Signal4worth watching, 1 to 5
AreaReminderswhat it touches
KindIn Developmentin v2.1.271,
Nothing to try yet Notable

New 'sleepy_snowflake' setting controls how widely kept reminders are delivered, per model and conversation

What

A new mechanism decides, separately for each model and each conversation, whether "kept reminders" are delivered at one of three scopes: threads, all, or off. It can be configured through the CLAUDE_CODE_SLEEPY_SNOWFLAKE environment variable, through a client-data map keyed by model pattern, or through a growthbook gate, and it only applies when using Anthropic's first-party API.

Why

This gives finer control over how often reminders (contextual notes Claude Code injects) reach the model, which can affect how much reminder-related content shows up depending on your model and conversation setup.

Read from
Feature flag
tengu_sleepy_snowflake 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 v2.1.271: 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 v2.1.271. 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 has been read yet about how the tengu_sleepy_snowflake gate is currently set for this site's account, so no statement is made about…
The name it cites is new in this buildNew in this build: tengu_sleepy_snowflake

See this entry in the whole of v2.1.271 →