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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial

Workflow prompt provenance now read from CLAUDE_CODE_WORKFLOW_PROMPT_PROVENANCE and made synchronous

TierUse it nowhow much it should matter to you
Useful3my rating, 1 to 5
Signal3worth watching, 1 to 5
AreaWorkflowswhat it touches
KindInternal Changesin v2.1.277,
Use it now Notable

Workflow prompt provenance now read from CLAUDE_CODE_WORKFLOW_PROMPT_PROVENANCE and made synchronous

What

The function that used to read the CLAUDE_CODE_DAPPER_LAGOON environment variable (falling back to a gate called MOo) now reads a new environment variable, CLAUDE_CODE_WORKFLOW_PROMPT_PROVENANCE, falling back to a gate called tengu_bubbly_harbor, which defaults to true. Two places in the workflow engine that used to await this check now call it directly, since it no longer needs to run asynchronously.

Why

The flag server is currently returning this gate as on for both this site's account and the anonymous baseline, though no reading has been taken specifically under this release yet. Renaming the environment variable and making the check synchronous suggests this first-party detection logic was reworked and simplified.

Read from
Feature flag
tengu_bubbly_harbor 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 v2.1.277: 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 v2.1.277. It isn't a statement about your account. What a flag value here can and cannot tell you

How sure we are
One source agreesOne thing we can check says the same as this entry.
The name it cites is new in this buildNew in this build: tengu_bubbly_harbor

See this entry in the whole of v2.1.277 →

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