chore: import upstream snapshot with attribution

2026-07-13 13:25:13 +08:00
commit ec2b666284
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+# 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.
+
+"""Game-developer agent that writes browser games as self-contained HTML.
+
+Wraps a Google Antigravity SDK agent as an ADK agent. See the package README
+for setup and details.
+"""
+
+import os
+
+from google.adk.labs.antigravity import AntigravityAgent
+from google.antigravity import LocalAgentConfig
+from google.antigravity.hooks import policy
+
+# 1. Configure the Google Antigravity SDK game-developer agent. The
+#    workspace-scoped policy lets it create and edit files inside the game_repo
+#    workspace (built-in file tools are allowed there) while keeping writes
+#    contained.
+_sample_dir = os.path.dirname(os.path.abspath(__file__))
+_workspace = os.path.join(_sample_dir, "game_repo")
+_trajectories = os.path.join(_sample_dir, "trajectories")
+os.makedirs(_workspace, exist_ok=True)
+os.makedirs(_trajectories, exist_ok=True)
+_sdk_config = LocalAgentConfig(
+    system_instructions="""\
+You are a senior web game developer. You build small, runnable games on request \
+as a single self-contained HTML file with inline CSS and JavaScript (no external \
+assets or third-party dependencies). Write the HTML file into the allowed \
+workspace using a clean absolute filesystem path.
+
+Build the file incrementally: first create it with a minimal skeleton (HTML \
+structure, canvas, and empty script), then add CSS and the game logic over a \
+few substantial edits. Group each edit around a complete feature (e.g. all \
+styling, then rendering, then input handling) rather than many tiny changes, \
+but do not attempt to write the entire game in one step.
+
+After the file is complete, briefly explain how to play it (open the .html file \
+in a browser).""",
+    workspaces=[_workspace],
+    policies=[*policy.workspace_only([_workspace])],
+    save_dir=_trajectories,
+)
+
+# 2. Wrap the SDK config as a standalone ADK root agent.
+root_agent = AntigravityAgent(
+    name="antigravity_game_developer",
+    description=(
+        "Builds small, runnable games inside the game_repo workspace via the"
+        " Antigravity SDK."
+    ),
+    config=_sdk_config,
+)