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
Claude Code v2.1.271 ·

Forked skill tool executions register as real background tasks

Forked skill executions now register as real, trackable background tasks

TierYou'll noticehow much it should matter to you
Useful3my rating, 1 to 5
Signal3worth watching, 1 to 5
AreaSkillswhat it touches
KindImprovementsin v2.1.271,
You'll notice Notable

Forked skill executions now register as real, trackable background tasks

What

When a skill (a packaged set of instructions Claude Code can run) is executed as a forked, background sub-agent, it now registers itself in Claude Code's task registry with its own cancel control, separate from the process that started it. When the skill finishes, it's marked as stopped, completed, or failed in that registry and then removed. Previously, a forked skill ran silently, sharing the caller's cancel control and without appearing in the task registry at all.

Why

This makes background skill runs visible and individually cancellable like other tracked background tasks, rather than being invisible to whatever monitors or manages running tasks.

Read from
Feature flag
tengu_harbor Off by default, switched on for this account

The shipped code defaults this off, and the flag server returned on for the one account this site reads on this version. That is the reading that makes the entry above worth a second look, and it still says nothing about your account.

This account: on · anonymous baseline: on · compiled default in v2.1.271: off

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

tengu_lively_waffle On for this account, and not off by default

The flag server returned on for the one account this site reads, and nothing in this release compiles it off by default. The compiled default is shown below, and says which it is when we cannot read one: a fifth of gates compile in a string or a number rather than on or off, and most published releases have no gate table behind them at all. No client can see what the server returns for your account.

This account: on · anonymous baseline: on · compiled default in v2.1.271: on

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.271. It isn't a statement about your account. What a flag value here can and cannot tell you

What has happened since
Flag reading moved The flag server now returns on for tengu_lively_waffle, read as this account. A reading is one sample. Claude Code evaluates its flags remotely, so no client sees the targeting rule behind a value and this says nothing about your account.

See this across every release →

See this entry in the whole of v2.1.271 →