What it is
A new 'Projects' recap mode for the background classifier can summarize thread status, currently unread/off
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.265.
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.
First cited
0No release's published evidence quotes this name. The ledger indexes the Evidence lines of every changelog on this site, so this says nobody here has ever quoted it; it says nothing about how old the name is.
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.
Names beside it
Every feature flag in the inventory starting tengu_bg, up to twelve of them.
tengu_bg_adopt_upgrade_respawnBackground sessions stop needlessly restarting when your running build is already newer. never mined
tengu_bg_agent_actionBackground-agent telemetry no longer records which agent template was used never mined
tengu_bg_attach_outcomeBackground attach events now record cold starts, surface and first frame details. never mined
tengu_bg_attach_stall_msNo description from anybody. v2.1.138
tengu_bg_attach_upgradeNo description from anybody. v2.1.162
tengu_bg_binary_takeoverThe background daemon can now retire a same-version instance; build is 2.1.248. v2.1.152
tengu_bg_classifier_configBackground classifier gets a new, currently inactive setting to control how much recent conversation text it quotes v2.1.138
tengu_bg_daemon_binary_takeoverThe background daemon can now retire a same-version instance; build is 2.1.248. never mined
tengu_bg_daemon_spawn_failedNo description from anybody. v2.1.138
tengu_bg_daemon_spawn_reinstall_waitStarting the background helper during an npm reinstall now waits and retries instead of failing. never mined
tengu_bg_dispatch_fallbackBackground dispatch failures now distinguish a daemon that started but couldn't launch Claude Code. never mined
tengu_bg_dispatch_rejectedThe background daemon now records why it refused a queued dispatch file. 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.