Unit 10 · React safely to live events

Restore subscriptions safely after reconnecting

You reconcile catalog changes and restore known subscription intent exactly once after reconnecting. Partial failure keeps the prior known-good ownership state.

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Unit example (nearest native match)

See the idea in context

source = AxMCPEventSource(
    client,
    "inventory",
    identity_scope="tenant:demo",
    trust="authenticated",
    resource_subscriptions="all",
)
target = AxEventTarget(
    "inventory-agent",
    invoke,
    mapInput=lambda event, _: {"uri": event.data["uri"]},
    retrySafety="idempotent",
)
runtime = AxEventRuntime(
    [AxEventRoute("resource-wake", "wake",
        {"types": ["mcp.resource.updated"]},
        "inventory-agent", True)],
    {"targets": [target], "sources": [source]},
)
runtime.start()

Run itIn your own project

pip install axllm

from axllm import ai, ax

llm = ai('openai', api_key=os.environ['OPENAI_API_KEY'])
classify = ax('review:string -> sentiment:class "positive, negative, neutral"')

Set OPENAI_APIKEY in your environment before running provider-backed code.

In the ax repo

From a clone of the ax repo:

npm run example -- python src/examples/python/mcp/resource-wake-agent.py

Active practice

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See the idea in context

Show that you can use it

Source-backed follow-up