A2UI Files

• BREAKING: Validation modules a2ui.validation.* and a2ui.schema.validator are removed. Use A2uiCatalog.validate_components for component tree validation.
• BREAKING: A2uiCatalog.validator now returns a single-catalog PayloadValidator instance (from a2ui.core.validation) instead of A2uiValidator. PayloadValidator does not provide an envelope-walking .validate() method; call A2uiCatalog.validate_components or PayloadValidator.validate_component() / PayloadValidator.validate_function().
• BREAKING: A2uiTemplateManager is removed.
• BREAKING: Package dependency updated to require a2ui-core>=0.2.0,<0.3.0.
• Add type-safe Python Builder API under a2ui.builder for constructing A2UI component trees as nested objects and serializing them into protocol messages (#2425).
• A2uiCatalog.core_catalog now passes its common_types_schema through to Catalog.from_json, so a catalog that references the shared types across documents resolves them from that document instead of leaving the references unresolvable.
• Add SkillGenerator API and Skill / SkillSet domain models to compile inference format rules and component catalog definitions into standardized agent skill packages (SKILL.md) (#2516).
• Use is_at_least_version and ProtocolVersion.V1_0 in ExpressCompiler for protocol version comparisons.
• Update A2uiCompilationError to forward error details to A2uiError.details and inherit directly from A2uiError.

Published to PyPI: a2ui-agent-sdk 0.7.0

:::sh
pip install a2ui-agent-sdk==0.7.0