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 v2.1.277 ·

New tool-host attestation floor check (dark, double-gated)

New tool-host attestation floor check replaces old attestation execution logic, gated behind two flags

TierNothing to try yethow much it should matter to you
Useful3my rating, 1 to 5
Signal4worth watching, 1 to 5
AreaTool Attestationwhat it touches
KindIn Developmentin v2.1.277,
Nothing to try yet No documentation found

New tool-host attestation floor check replaces old attestation execution logic, gated behind two flags

What

A rewritten internal function now computes a policy verdict for a tool's host-attestation status against an acceptance floor, returning one of "not_policed", "pass", "config_exception", or "below_floor". This replaces an earlier version of the same function that actually executed the tool call directly. The overall attestation mode (whether checks merely observe or actually enforce) depends on the tengu_vast_tulip setting, and the whole check only runs at all if a separate condition gated by tengu_breezy_fairy returns true.

Why

This restructures how Claude Code evaluates whether a tool's host meets an attestation floor, separating the policy decision from tool execution, though whether this behaves as observe-only or enforcing depends on server-controlled settings not disclosed here.

Read from
Names in the bundletengu_vast_tuliptengu_breezy_fairy
Feature flag
tengu_breezy_fairy Off in both readings

The flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.

This account: off · anonymous baseline: off · compiled default in v2.1.277: 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_vast_tulip Off in both readings

The flag server returned off for the account this site reads and for the anonymous baseline. A reading of off cannot rule out a rollout these two readings sit outside of.

This account: off · anonymous baseline: off · compiled default in v2.1.277: 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.

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_vast_tulip

See this entry in the whole of v2.1.277 →