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Sweep 28 Aug 2026 · 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 Feeds RSS JSON llms.txt

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

Reference / Feature flags

tengu_ccr_no_subscriber_flush_ms

A Claude Code feature flag, read out of the shipped bundle. No mined inventory carries it: everything below comes from what this site has written about it.

What it is

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

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.248.

Presence across releases

The miner has never read a build containing this name. It is here because a changelog entry of ours names it, which is evidence that it existed and not evidence of which releases carried it. The inventory starts at v2.1.138 and everything older than that was never mined.

Gate readings

ReleaseResolvedThis accountAnonymousCompiled default
v2.1.248 Not enough to say no value returned no value returned not a boolean we can read

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.

Changelog entries naming it

  1. v2.1.248The no-subscriber flush interval is inert at its default of 0

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

    gate cited by this entry

  2. v2.1.248Cloud sessions batch stream events and hold them back when nobody is watching

    Cloud sessions batch stream events and can hold them back when nobody is watching.

    gate cited by this entry

Documentation pages

None of Anthropic's documentation pages this site has a copy of carries this name.

Names beside it

Every feature flag in the inventory starting tengu_ccr, up to twelve of them.

tengu_ccr_bridgeNo description from anybody. 2.1.138 tengu_ccr_bundle_max_bytesNo description from anybody. 2.1.138 tengu_ccr_bundle_seed_enabledIf a folder is too big to seed a cloud session, you now see the size, cap and biggest files. 2.1.227 tengu_ccr_bundle_uploadMost of this release's changed code is the build system moving modules, not features changing. never mined tengu_ccr_delta_rehydrateNo description from anybody. 2.1.181 tengu_ccr_handoff_metadataHanding a session to the cloud can include a snapshot of your checkout, off by default. 2.1.242 tengu_ccr_idle_heartbeatRemote sessions can detect a dead connection through probes and force a reconnect, off by default. 2.1.227 tengu_ccr_init_park_reportA background worker can now report at startup that it needs your attention rather than just idle. never mined tengu_ccr_orphan_restore_wakeIf a container restart kills background work, your session now wakes up and Claude is told what was lost. never mined tengu_ccr_orphan_restore_wake_shellsIf a container restart kills background work, your session now wakes up and Claude is told what was lost. never mined tengu_ccr_overlay_bundleA cloud session can start from your local commits instead of always pulling the remote copy. never mined tengu_ccr_preserved_event_ids_clampedCompaction now trims the saved conversation payload to match the preserved message list, avoiding mismatches. never mined

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.