feat: initial release of ARTEMIS Android Agent & Automation Platform

ARTEMIS is an autonomous multimodal Android agent and mobile UI automation
platform engineered for physical devices and emulators. It combines state-of-the-art
multimodal Vision-Language Models (VLMs) with hierarchical closed-loop planning,
resilient self-healing, and deep Android subsystem integration.

Key Features & Architectural Highlights:
- Dual-Engine Orchestration:
  * Pro Engine: Multi-agent closed-loop (Planner -> Operator -> Validator/Failure Analyzer -> Summarizer) powered by LangGraph.
  * Flash Engine: Ultra-fast reactive loop for deterministic, low-latency UI execution (<35 steps).
- Multimodal Perception & Grounding:
  * Hybrid visual screenshot grounding, real-time OCR extraction, and XML accessibility hierarchy parsing.
  * Dynamic-First, Coordinate-Fallback locating strategy for maximum resilience against UI drift.
- Autonomous Self-Healing & Diagnostics:
  * Failure analyzer and safety net for popup dismissal, crash recovery, and auto-retry.
  * Diagnostic sub-agents for log analysis, video recording inspection, and object detection.
- Unified CLI & Python SDK:
  * Rich CLI with commands: init, doctor, run, trace, batch, bench, server, and mcp.
  * Fluent Python SDK with Pydantic structured output models and package locking.
- Multi-Provider LLM Architecture:
  * Support for Google Gemini, OpenAI, Anthropic Claude, Vertex AI, OpenRouter, xAI Grok, and local endpoints (Ollama/vLLM).
  * Centralized configuration in config/artemis.jsonc.
- Native MCP & Observability:
  * Model Context Protocol (MCP) server endpoints for AI IDEs.
  * Full trace recording with before/after screenshots, action overlays, and execution replays.

Change-Id: I430b93ee2b76b54cc5a3c6eeccd15d2cf29830a1

artemis/tools/diagnoser_submit_answer_tool.py

@@ -0,0 +1,88 @@
+# 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.
+
+"""Universal tool for submitting final diagnosis and actionable recovery advice."""
+
+from typing import Any
+
+from langchain_core.tools import BaseTool
+from pydantic import BaseModel, Field
+
+from artemis.context import ArtemisContext
+from artemis.data_engine.trace import trace_langchain_tool
+from artemis.drivers.base import BaseDeviceDriver
+from artemis.tools.base import ArtemisTool, ToolRegistry
+from artemis.utils.logger import get_logger
+
+logger = get_logger(__name__)
+
+
+# pylint: disable=too-few-public-methods
+class SubmitAnswerArgs(BaseModel):
+    """Arguments schema for submitting final diagnoser answer."""
+
+    analysis: str = Field(
+        ...,
+        description=(
+            "A detailed and concise explanation of the root cause of the"
+            " failure or query. Answer in one full paragraph."
+        ),
+    )
+    actionable_steps: list[str] = Field(
+        default_factory=list,
+        description=(
+            "A list of concrete recovery instructions or next steps. Each"
+            " step is a short sentence. If no actionable steps are"
+            " available, return an empty list."
+        ),
+    )
+
+
+class SubmitAnswerTool(ArtemisTool):
+    """Universal tool for submitting final diagnosis and actionable recovery advice."""
+
+    def __init__(self):
+        super().__init__(
+            name="submit_answer",
+            description=(
+                "[Finalization] Submits the final diagnosis and actionable recovery advice. "
+                "Call this tool when you have pinpointed the root cause."
+            ),
+            args_schema=SubmitAnswerArgs,
+            category="custom",
+        )
+
+    # pylint: disable=too-many-arguments,too-many-positional-arguments
+    async def execute(
+        self,
+        driver: BaseDeviceDriver | None = None,  # pylint: disable=unused-argument
+        ctx: ArtemisContext | None = None,  # pylint: disable=unused-argument
+        analysis: str | None = None,  # pylint: disable=unused-argument
+        actionable_steps: list[str] | None = None,  # pylint: disable=unused-argument
+        **kwargs: Any,
+    ) -> str:
+        logger.info("Diagnoser submitted answer via tool.")
+        return "Answer submitted successfully."
+
+
+# Universal tool instance & aliases
+submit_answer = SubmitAnswerTool()
+SubmitAnswer = SubmitAnswerTool
+DiagnoserSubmitAnswerTool = SubmitAnswerTool
+ToolRegistry.register(submit_answer)
+
+
+def get_submit_answer_tool(ctx: ArtemisContext) -> BaseTool:
+    """Exports submit_answer as a LangChain BaseTool."""
+    return trace_langchain_tool(submit_answer.to_langchain_tool(ctx), ctx)