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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 v2.1.248 ·

The no-subscriber flush interval is inert at its default of 0

Subscriber-aware flush buffering is disabled by its default of zero.

Nothing to try yet In Development
JSON All of v2.1.248
Nothing to try yetTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
Remote ControlArea: what it touches
In DevelopmentKind: in v2.1.248,
In DevelopmentSection of the release

tengu_ccr_no_subscriber_flush_ms defaults to 0, which disables the path.

What

The subscriber-aware buffering above is switched off in this build. The interval comes from tengu_ccr_no_subscriber_flush_ms with a fallback of 0, and 0 disables the path entirely, so only a server value can turn it on.

Details
  • The server's events response carries a has_subscribers field, but the response body is only parsed at all when the interval is greater than 0.
  • The value is re-read on every remote-config refresh, so it can start applying mid-session without a restart.
  • With it enabled, ephemeral events wait for the longer of the two intervals instead of the normal one, meaning a cloud session nobody is watching streams less eagerly.
Evidence

tengu_ccr_no_subscriber_flush_ms

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

Read from
Feature flag
tengu_ccr_no_subscriber_flush_ms 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 v2.1.248: not a boolean we can read

Read once, for one account on one subscription tier, against v2.1.248. 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 null for tengu_ccr_no_subscriber_flush_ms, 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 2000 for tengu_ccr_no_subscriber_flush_ms, 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 null for tengu_ccr_no_subscriber_flush_ms, 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 2000 for tengu_ccr_no_subscriber_flush_ms, 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 null for tengu_ccr_no_subscriber_flush_ms, 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 2000 for tengu_ccr_no_subscriber_flush_ms, 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 null for tengu_ccr_no_subscriber_flush_ms, 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 2000 for tengu_ccr_no_subscriber_flush_ms, 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_ccr_no_subscriber_flush_ms

See this entry in the whole of v2.1.248 →

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