Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
SDK ProtocolArea: what it touches
New FeaturesKind: in v2.1.219,
New FeaturesSection of the release
What
The capabilities array advertised at init gains a second entry next to interrupt_receipt_v1, letting SDK consumers feature-detect cancel_queued support instead of sniffing the CLI version.
Details
Capability string is interrupt_cancel_queued_v1
The capability list is built unconditionally in this build, so it is present for every session
Pairs with the cancel_queued field on the interrupt control_request
Evidence
'interrupt_cancel_queued_v1' = the interrupt control_request honors cancel_queued:true
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
