feat(a2ui): live sendDataModel round-trip + capabilities helper (Phase 4 of the v0.9 migration) - #820
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Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
…e 4) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Summary
Phase 4 — final phase of the A2UI v0.9.1 migration (follows #817, #818, #819).
sendDataModelmetadata: whencreateSurface.sendDataModelis true, outbound action messages now attach the live per-surface data model (user edits included via the Phase-3 surface store, renderer-internal_a2uiCheckskey stripped) instead of the agent-seeded snapshot.a2uiClientCapabilities(): typed helper returning the renderer'sA2uiClientCapabilities(supportedCatalogIds: [basic catalog]) for hosts to attach as catalog-negotiation transport metadata.With this, the migration is fully conformant to the v0.9.1 stable feature set: wire format, client-side functions, validation checks, and the sendDataModel round-trip.
Verification
libs/a2ui+libs/chatlint/test/build green (1135 chat tests incl. the new round-trip spec); pytest twins 56 + 23nx affected: green except the known pre-existingcockpit-telemetry:lintworktree-environment failure (untouched project)sendDataModel: truefeedback form, typed a comment, submitted — the outbound wire message (verified via thread state) carriedmetadata.a2uiClientDataModel.surfaces["feedback-surface-1"].comment = "The new checkout flow is great", i.e. the live-typed value round-tripped to the agent.🤖 Generated with Claude Code