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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_delta_rehydrate

A Claude Code feature flag, read out of the shipped bundle. It has been in the build since v2.1.181, including the newest one read.

What it is

Nobody has written a line about this one. It is not in any of Anthropic's reference tables and no changelog entry here carries a description of it. It is in the build, which is the whole of what this page can claim.

Presence across releases

ReleasesReadingDeclared typeDefault
2.1.245 – 2.1.250 5 releases never mined — —
2.1.181 – 2.1.243 57 releases in the build — bool:false

A row reading never mined is a release with no archived bundle behind it. Nothing was read out of it, so nothing here says whether the name was in it. A declared type or a default is only ever what that release's own bundle stated.

Gate readings

No release here has a gate table behind it for this flag. Most published releases have none at all: the readings exist only for versions the pipeline captured flag state on.

Changelog entries naming it

No changelog entry here has ever named it. That is a statement about what has been written, not about the name: it has been in the build since v2.1.181 without anybody writing a line about it.

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