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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
Claude Code v2.1.278 ·

Billing notice surfaces as a stderr/stream-json warning in headless (print) mode

The classifier billing notice prints to stderr or a stream-json warning when there's no dialog to show

TierNothing to try yethow much it should matter to you
Useful2my rating, 1 to 5
Signal3worth watching, 1 to 5
AreaAuto Modewhat it touches
KindIn Developmentin v2.1.278,
Nothing to try yet

The classifier billing notice prints to stderr or a stream-json warning when there's no dialog to show

What

In headless usage, such as -p/print mode or when output is set to stream-json, there's no interactive screen to show a pop-up dialog on. In those cases, the same classifier billing notice message is instead written to stderr, or emitted as a stream-json warning event when --verbose stream-json output is being used.

Why

This makes sure scripts and automated runs still get told when auto mode has fallen back to billed classifier requests, instead of the notice silently disappearing because there's no dialog surface to show it on.

Read from
Names in the bundle--verbose
Feature flag
tengu_velvet_heron Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.278: 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 v2.1.278. It isn't a statement about your account. What a flag value here can and cannot tell you

Since it was published

The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.

Confirmed since Anthropic's documentation has since written up --verbose, on CLI reference. | `--forward-subagent-text` | Emit [subagent](/docs/en/sub-agents) text and thinking blocks in the output stream as `assistant` and `user` messages with `parent_tool_use_id` set, so you can reconstruct each subagent's transcript. Without t… cli-reference see the edit
How sure we are
Two sources agreeTwo things we can check say the same as this entry.
Anthropic's documentation agreesAnthropic's documentation has since written up --verbose, on CLI reference.
The name it cites is new in this buildNew in this build: tengu_velvet_heron

See this entry in the whole of v2.1.278 →

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