Follow Discord
Sweep 19 Sep 2026 · 02:36Z Build v2.1.278 500 read Stable v2.1.267 Latest v2.1.278 Next v2.1.278 Feeds RSS JSON llms.txt Unofficial
Reference Feature flags
One name

tengu_bg_agent_action

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.

Familyfeature flagFeature flags
Builds0of the 122 on this box
First seen — never in a mined build
Last seen — never in a mined build
Statusnever minedas of v2.1.278

What it is

Background-agent telemetry no longer records which agent template was used

Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.267.

Presence across releases

0

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.

First cited

1

The earliest release whose published evidence quoted tengu_bg_agent_action was v2.1.267, 9 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 above.

ReleaseDateThe span that was quoted
v2.1.2679 Sep 2026tengu_bg_agent_action

Gate readings

0

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.

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_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_classifyA new 'Projects' recap mode for the background classifier can summarize thread status, currently unread/off never mined 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.