Added a sample to show how the conditional routing works.

examples/python/snippets/agents/workflow-agents/conditional-routing.py

@@ -0,0 +1,100 @@
+# 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.
+
+from google.adk import Agent, Event, Workflow
+from pydantic import BaseModel, Field
+
+MODEL_NAME = "gemini-flash-latest"
+
+
+class WeekendBudget(BaseModel):
+  budget: float = Field(
+      default=None, description="The budget for the weekend in US dollars."
+  )
+
+
+def process_input(node_input: str):
+  """Saves the user's raw text into the workflow state."""
+  return Event(state={"latest_input": node_input})
+
+
+extract_budget = Agent(
+    name="extract_budget",
+    model=MODEL_NAME,
+    instruction=(
+        "You are a data extraction assistant. Read the user's latest input:"
+        " '{latest_input}'. Extract the budget they have for their weekend"
+        " plans. If they do not explicitly mention a budget, set it to 100."
+    ),
+    output_schema=WeekendBudget,
+    output_key="weekend_budget",
+)
+
+
+def route_weekend(weekend_budget: WeekendBudget):
+  amount = weekend_budget.budget
+
+  if amount < 5:
+    yield Event(route="too_low")
+  elif amount < 100:
+    yield Event(route="cheap_ideas")
+  else:
+    yield Event(route="fancy_ideas")
+
+
+def handle_too_low():
+  """Fallback route for very low budgets."""
+  yield Event(
+      message="I'm sorry, but a budget under $5 is too low to plan anything fun!"
+  )
+
+
+value_agent = Agent(
+    name="value_agent",
+    model=MODEL_NAME,
+    instruction=(
+        "The user is looking for weekend ideas and has a budget of"
+        " ${weekend_budget.budget}. Suggest 2 to 3 fun, cheap ideas they"
+        " can do that fit strictly within this budget."
+    ),
+)
+
+
+premium_agent = Agent(
+    name="premium_agent",
+    model=MODEL_NAME,
+    instruction=(
+        # Changed the variable placeholder here:
+        "The user is looking for weekend ideas and has a generous budget of"
+        " ${weekend_budget.budget}. Suggest 2 to 3 fancy, premium ideas they"
+        " can do that utilize this budget."
+    ),
+)
+
+
+root_agent = Workflow(
+    name="weekend_planner",
+    edges=[
+        ("START", process_input, extract_budget, route_weekend),
+
+        (
+            route_weekend,
+            {
+                "too_low": handle_too_low,
+                "value_ideas": value_agent,
+                "premium_ideas": premium_agent,
+            },
+        ),
+    ],
+)