feat: initialize agent SDK core with schema definitions and basic UI catalog components

Author: nan-yu

.github/workflows/python_agent_sdk_build_and_test.yml

@@ -53,6 +53,10 @@ jobs:
         working-directory: agent_sdks/python/a2ui_agent
         run: uv run pyink --check .
 
+      - name: Check Formatting for Core
+        working-directory: agent_sdks/python/a2ui_core
+        run: uv run --with pyink pyink --check .
+
       - name: Check Formatting for Conformance
         working-directory: agent_sdks/conformance
         run: uv run --with pyink pyink --check tests/
@@ -61,6 +65,10 @@ jobs:
         working-directory: agent_sdks/python/a2ui_agent
         run: uv run --with pytest pytest tests/
 
+      - name: Run unit tests for Core
+        working-directory: agent_sdks/python/a2ui_core
+        run: uv run --with pytest pytest tests/
+
       - name: Run conformance YAML validation
         working-directory: agent_sdks/conformance
         run: uv run pytest
@@ -69,6 +77,10 @@ jobs:
         working-directory: agent_sdks/python/a2ui_agent
         run: uv build .
 
+      - name: Build python Core
+        working-directory: agent_sdks/python/a2ui_core
+        run: uv build .
+
       - name: Run validation scripts on assets packing
         working-directory: agent_sdks/python/a2ui_agent
         run: uv run python tests/integration/verify_load_real.py

agent_sdks/python/a2ui_core/pyproject.toml

@@ -18,4 +18,23 @@ version = "0.1.0"
 description = "A2UI Python SDK - Core Library"
 readme = "README.md"
 requires-python = ">=3.14"
-dependencies = []
+dependencies = [
+    "pydantic>=2.10.0",
+]
+
+[dependency-groups]
+dev = [
+    "pytest>=8.0.0",
+    "pyink>=24.10.0",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/a2ui"]
+
+[[tool.uv.index]]
+url = "https://pypi.org/simple"
+default = true