tengu_left_arrow_blocked
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.
Left-arrow no longer backgrounds agents while you have unsent text, so drafts survive.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.219.
In the changelogs
4Releases whose published page names tengu_left_arrow_blocked.
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v2.1.275
New --project-config-root CLI flag reroutes project scope across the app
A new --project-config-root flag lets a host pin Claude Code's project directory separately from the working directory
found in this entry's text
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v2.1.269
Left-arrow "human-cadence" absorb now logs telemetry instead of being silent
Absorbing a left-arrow press during the confirm gap now logs telemetry instead of doing nothing
gate cited by this entry, found in this entry's text
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v2.1.257
Left-arrow gesture blocked telemetry consolidated into one dispatcher
Left-arrow gesture blocked telemetry now runs through one dispatcher keyed by stage, with no behavior change.
found in this entry's text, gate cited by this entry
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v2.1.219
Left-arrow backgrounding refuses to eat an unsent draft
Left-arrow no longer backgrounds agents while you have unsent text, so drafts survive.
gate cited by this entry, found in this entry's text
Gate readings
0No 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.
First cited
1The earliest release whose published evidence quoted tengu_left_arrow_blocked was v2.1.257, 1 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
0The 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.
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.