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changed example to plugin #2177

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22 changes: 18 additions & 4 deletions docs/a2a/quickstart-consuming.md
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Expand Up @@ -177,10 +177,12 @@ prime_agent = RemoteA2aAgent(
!!! note "Using the new A2A integration"
The `use_legacy` parameter defaults to `True`, so the sample above uses the legacy path. Set `use_legacy=False` to use the new ADK-A2A integration, which sends the [A2A extension](a2a-extension.md) to the remote agent.

Then, you can simply use the `RemoteA2aAgent` in your agent. In this case, `prime_agent` is used as one of the sub-agents in the `root_agent` below:
Then, you can simply use the `RemoteA2aAgent` in your agent. In this case, `prime_agent` is used as one of the sub-agents in `root_agent`. To apply a shared identity or global rules across the entire agent hierarchy, configure the [`GlobalInstructionPlugin`](/plugins/#prebuilt-plugins) in your `App`:

```python title="a2a_basic/agent.py"
from google.adk.agents.llm_agent import Agent
from google.adk.apps import App
from google.adk.plugins.global_instruction_plugin import GlobalInstructionPlugin
from google.genai import types

root_agent = Agent(
Expand All @@ -195,9 +197,6 @@ root_agent = Agent(
3. If the user asks to roll a die and then check if the result is prime, call roll_agent first, then pass the result to prime_agent.
Always clarify the results before proceeding.>
""",
global_instruction=(
"You are DicePrimeBot, ready to roll dice and check prime numbers."
),
sub_agents=[roll_agent, prime_agent],
tools=[example_tool],
generate_content_config=types.GenerateContentConfig(
Expand All @@ -209,8 +208,23 @@ root_agent = Agent(
]
),
)

app = App(
name="a2a_basic",
root_agent=root_agent,
plugins=[
GlobalInstructionPlugin(
global_instruction=(
"You are DicePrimeBot, ready to roll dice and check prime numbers."
)
)
],
)
```

!!! note "Global instructions via Plugins"
The `global_instruction` parameter on `Agent` is deprecated. Use `GlobalInstructionPlugin` registered on your `App` or `Runner` to apply consistent rules or identity across all agents in your workflow.

### Advanced Configuration: Custom Converters and Interceptors

Internally, the `RemoteA2aAgent` translates between the A2A protocol format and the ADK's native `Event` system. You can customize this behaviour by passing an [`A2aRemoteAgentConfig`](https://github.com/google/adk-python/blob/main/src/google/adk/a2a/agent/config.py) object via the `config` parameter to `RemoteA2aAgent`.
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