Wei (Jack) Sun
1c64a41b53
Introduces two major capabilities: - Workflow runtime: graph-based execution engine for composing deterministic execution flows for agentic apps, with support for routing, fan-out/fan-in, loops, retry, state management, dynamic nodes, human-in-the-loop, and nested workflows - Task API: structured agent-to-agent delegation with multi-turn task mode, single-turn controlled output, mixed delegation patterns, human-in-the-loop, and task agents as workflow nodes Co-Authored-By: Bo Yang <ybo@google.com> Co-Authored-By: George Weale <gweale@google.com> Co-Authored-By: Sean Zhou <seanzhougoogle@google.com> Co-Authored-By: Shangjie Chen <deanchen@google.com> Co-Authored-By: Swapnil Agarwal <swapnilag@google.com> Co-Authored-By: Wei Sun <weisun@google.com> Co-Authored-By: Xuan Yang <xygoogle@google.com> Co-Authored-By: Yifan Wang <wanyif@google.com> Change-Id: I35932c50cfe29ff68559e3781713dbb5eb7b3382
70 lines
2.1 KiB
Python
70 lines
2.1 KiB
Python
# Copyright 2026 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import asyncio
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import base64
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from typing import Any
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from google.adk import Event
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from google.adk import Workflow
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from google.genai import types
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def send_string(node_input: Any = None):
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"""Sends a single string message."""
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yield Event(message="1. This is a simple string message.")
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def send_multimodal(node_input: Any = None):
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"""Sends a multi-modal message containing a string and an inline image."""
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# A 16x16 solid red PNG base64 encoded
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red_square_png = base64.b64decode(
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"iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAXElEQVR4nO2TSQ7AIAwD7fz/z+ZQtapwmrJc8QklmjBIgZJgIZMiAIl9KYbhjx4fgwosbNxgMrF0+4uhgHnYDM6AzQHJeg5HYtyHFfgy2AztN/5tZWfrBtVzkl4DzfQkEPd+cEkAAAAASUVORK5CYII="
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)
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yield Event(
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message=[
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types.Part.from_text(
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text=(
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"2. Here is a multi-modal message with an inline image (red"
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" square):"
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)
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),
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types.Part.from_bytes(data=red_square_png, mime_type="image/png"),
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]
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)
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async def multiple_messages(node_input: Any = None):
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"""Sends multiple complete messages from the same node with an interval."""
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yield Event(message="3. Processing step 1...")
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await asyncio.sleep(1.0)
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yield Event(message="3. Processing step 2...")
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await asyncio.sleep(1.0)
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yield Event(message="3. Done processing.")
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root_agent = Workflow(
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name="message",
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edges=[
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(
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"START",
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send_string,
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send_multimodal,
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multiple_messages,
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),
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],
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)
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