feat: improve task execution, verification and packaging

Add execution incidents, action bursts and shared Flash history.

Expose verification and Explorer settings with streamed check results.

Support graceful cancellation, recording recovery and bundled UI resources.

Add CI quality checks and clean up comments and documentation.

tests/unit/test_packaging_resources.py

@@ -0,0 +1,56 @@
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Contract tests for release metadata and bundled runtime resources."""
+
+from importlib.metadata import version
+
+import artemis
+from artemis import resources
+
+
+def test_public_version_comes_from_distribution_metadata():
+    assert artemis.__version__ == version("artemis")
+
+
+def test_source_tree_contains_complete_release_resources():
+    config_path = resources.get_bundled_config_path("artemis.jsonc")
+    showcase_path = resources.get_bundled_showcase_dist()
+
+    assert config_path is not None and config_path.is_file()
+    assert showcase_path is not None and (showcase_path / "index.html").is_file()
+
+
+def test_bundled_resource_accessors_require_complete_assets(tmp_path, monkeypatch):
+    resource_root = tmp_path / "resources"
+    config_dir = resource_root / "config"
+    showcase_dir = resource_root / "showcase_ui"
+    config_dir.mkdir(parents=True)
+    showcase_dir.mkdir()
+    (config_dir / "artemis.jsonc").write_text("{}", encoding="utf-8")
+    (showcase_dir / "index.html").write_text("<html></html>", encoding="utf-8")
+
+    monkeypatch.setattr(resources, "files", lambda _package: resource_root)
+
+    assert resources.get_bundled_config_path("artemis.jsonc") == (config_dir / "artemis.jsonc")
+    assert resources.get_bundled_config_path("missing.jsonc") is None
+    assert resources.get_bundled_showcase_dist() == showcase_dir
+
+
+def test_incomplete_showcase_resource_is_rejected(tmp_path, monkeypatch):
+    resource_root = tmp_path / "resources"
+    (resource_root / "showcase_ui").mkdir(parents=True)
+    monkeypatch.setattr(resources, "files", lambda _package: resource_root)
+
+    assert resources.get_bundled_showcase_dist() is None