Follow Discord
Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.273 ·

Remote Control stream events gain a configurable first-flush delay

Remote Control sessions can now delay and tune how the very first streamed event is sent to the backend

TierUnder the hoodhow much it should matter to you
Useful2my rating, 1 to 5
Signal2worth watching, 1 to 5
AreaTelemetrywhat it touches
KindIn Developmentin v2.1.273,
Group of 3 Under the hood Nothing to try yet

Remote Control sessions can now delay and tune how the very first streamed event is sent to the backend

What

The client that uploads events for Remote Control (bridge) sessions gained a new streamEventFirstFlushMs setting, alongside an existing setStreamEventFlushIntervalMs setter:

  • When streamEventFirstFlushMs is set to a value greater than zero, the very first stream_event is buffered as ephemeral instead of being sent immediately, short-circuiting the normal flush-interval batching just for that first event.
  • Both the flush interval and this new first-flush delay are now pushed into the client at runtime via the periodic config-apply routine, alongside the existing no-subscriber flush interval, no-subscriber upload hold, and drop-unwatched-events settings.
  • The setting defaults to 0 (no delay) and is read from remote config.

Why

This gives finer control over how quickly the first event of a Remote Control session reaches the backend, which can be tuned separately from the steady-state flush interval used for events after a subscriber is actively watching.

Read from
Feature flag
tengu_ccr_stream_first_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 v2.1.273: 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 v2.1.273. 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 20 for tengu_ccr_stream_first_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 100 for tengu_ccr_stream_first_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 20 for tengu_ccr_stream_first_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 100 for tengu_ccr_stream_first_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
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtWhether `tengu_ccr_stream_first_flush_ms` is enabled for any account is unread, so nothing can be said about whether this behavior is…
The name it cites is new in this buildNew in this build: tengu_ccr_stream_first_flush_ms

See this entry in the whole of v2.1.273 →

Feedback