You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
ArtifactsArea: what it touches
ImprovementsKind: in v2.1.251,
ImprovementsSection of the release
What
The artifact watch tool description now spells out that a live watch is held only by an interactive or SDK main-loop session. Publishing or calling watch from a subagent, teammate, background, or print session arms no live subscription at all.
Evidence
only an interactive or SDK main-loop session holds one — a subagent, teammate, background, or print session's publish or 'watch' arms none
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
