tengu_ccr_event_hold_enabled
A Claude Code feature flag, read out of the shipped bundle. It was in the build from v2.1.268 and was gone by v2.1.311.
Two new remote flags control telemetry event-holding and dropping unwatched stream events
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.268.
In the changelogs
12Releases whose published page names tengu_ccr_event_hold_enabled.
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v2.1.311
Remote sessions always follow the event policy the server sends
A remote switch for holding back remote-session events is gone, and remote sessions now always follow the event policy the server serves
gate cited by this entry
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v2.1.311
Event holding in remote sessions can no longer be switched off remotely
Remote sessions now always hold and merge events, and the server-side switch that could turn this off is gone
gate cited by this entry
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v2.1.305
New
CLAUDE_CODE_CCR_EVENT_FLUSH_POLICYsetting for remote sessionsA new environment variable,
CLAUDE_CODE_CCR_EVENT_FLUSH_POLICY, sets how a remote session sends out its eventsgate cited by this entry
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v2.1.296
Remote sessions drop oversized event messages, and the preview tunnel tracks unanswered pings
Hosted remote sessions now drop event messages with too many fields, and the preview tunnel can reconnect after a run of missed pings
gate cited by this entry
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v2.1.290
Remote sessions can now turn away apps on devices that fall below a trust policy
Remote sessions now check attached apps against a device trust policy and refuse ones that fall below it
gate cited by this entry
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v2.1.288
Remote sessions can send their events over a continuous stream when the server offers one
Cloud session workers can now accept a server offer to send events over a streaming connection, alongside the usual one-request-per-batch route
gate cited by this entry
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v2.1.286
Remote session startup records get a timestamp and a writer list
Startup requests in remote sessions now carry a creation time and a list of stream writers, and the remote client can react when the process exits
gate cited by this entry
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v2.1.285
Two new delivery options for remote sessions, flushing and read receipts
Remote sessions gain server-controlled options to send streamed output on its first piece and to acknowledge messages only once read
gate cited by this entry
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v2.1.284
Cloud sessions can be told to save tool records before write actions run
Anthropic's servers can now ask cloud sessions to wait until a tool call is saved before running tools that change files
gate cited by this entry
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v2.1.284
Remote sessions save a file-changing tool call before running it
In remote sessions other than bridge, Claude Code waits for a tool call that may write to be saved before it runs, up to a server-set limit
gate cited by this entry
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v2.1.268
New CCR worker flags: event-hold and drop-unwatched-stream-events
Two new remote flags control telemetry event-holding and dropping unwatched stream events
gate cited by this entry
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v2.1.268
New 'event hold' toggle for CCR client
A new 'event hold' toggle is added for remote session clients
gate cited by this entry
Gate readings
9| Release | Resolved | This account | Anonymous | Compiled default |
|---|---|---|---|---|
| v2.1.311 read on another version | Not enough to say | no value returned | no value returned | not a boolean we can read |
| v2.1.305 read on another version | Not enough to say | no value returned | no value returned | on |
| v2.1.296 read on another version | Not enough to say | no value returned | no value returned | on |
| v2.1.290 read on another version | Not enough to say | no value returned | no value returned | on |
| v2.1.288 read on another version | Not enough to say | no value returned | no value returned | on |
| v2.1.286 read on another version | Not enough to say | no value returned | no value returned | on |
| v2.1.285 read on another version | Not enough to say | no value returned | no value returned | on |
| v2.1.284 read on another version | Not enough to say | no value returned | no value returned | on |
| v2.1.268 | Not enough to say | no value returned | no value returned | on |
Two arms, because they disagree: this account is the one account this site reads and anonymous is a baseline with no identity attached. A reading says nothing about your account, and off cannot rule out a rollout both readings sit outside of. What these readings can and cannot show.
First cited
2The earliest release whose published evidence quoted tengu_ccr_event_hold_enabled was v2.1.268, 10 Sep 2026. That is the oldest release this project wrote about it, so it is a floor on the name's age and not the release that introduced it. It is not a presence reading: which builds carried the name is the table below.
Presence across releases
2Build by build
50One row per release since the first build this name was read out of. Absent means the build was read and the name was not in it, never mined means no bundle for that release was ever archived, and a declared type or a default is only ever what that release's own bundle stated.
Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the feature flag does. All feature flags.