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 v2.1.267 ·

Plan mode now gated behind a classifier flag

Plan mode's eligibility for classifier-based permission checks is now controlled by a tengu_violin_plan_classifier gate

TierNothing to try yethow much it should matter to you
Useful3my rating, 1 to 5
Signal3worth watching, 1 to 5
AreaPlan Modewhat it touches
KindIn Developmentin v2.1.267,
Group of 2 Nothing to try yet No documentation found

Plan mode's eligibility for classifier-based permission checks is now controlled by a tengu_violin_plan_classifier gate

What A new helper, Ro(), decides whether "plan" is a valid, selectable permission mode and whether the auto-mode/classifier-based permission-check path (used for deciding tool permissions) applies to a given session mode. For plan mode specifically, this now first checks a feature gate, tengu_violin_plan_classifier (enabled by default, evaluated with a tri-state check), before the classifier-based path is allowed to apply.

Why This lets Claude Code control, and if needed roll back, classifier-based permission checks for plan mode independently of other modes, without requiring a code change.

How sure we are
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubtNothing has been read yet about whether the `tengu_violin_plan_classifier` flag that controls this is on or off by default.
The name it cites is new in this buildNew in this build: tengu_violin_plan_classifier

See this entry in the whole of v2.1.267 →