First, ordered event streams. Every agent action produces an event with a global sequence number. Any agent can reconstruct the current system state by reading the event stream. This eliminates the need for agents to query each other directly, which is where the latency was hiding in our system.
Second, context propagation. Each event carries a context envelope that includes the originating user request, current session state and any constraints or deadlines. When an agent receives an event, it has the full picture without making additional calls. In our previous architecture, agents were making three to five round-trip calls just to assemble enough context to act on a single request. Third, coordination primitives. The spine provides built-in support for common patterns: sequential handoffs between agents, parallel fan-out with aggregation, conditional routing based on confidence scores and priority preemption when urgent requests arrive. These patterns would otherwise need to be implemented independently by each agent pair, duplicating logic and introducing inconsistency.
from collections import defaultdict
import time
class EventSpine:
def __init__(self):
self.sequence = 0
self.subscribers = defaultdict(list)
def publish(self, event_type, payload, context):
self.sequence += 1
event = Event(
seq=self.sequence,
type=event_type,
payload=payload,
context=context,
timestamp=time.time()
)
for handler in self.subscribers[event_type]:
handler(event)
return event
def subscribe(self, event_type, handler):
self.subscribers[event_type].append(handler)
Sreenivasa Reddy Hulebeedu Reddy
3 problems the Event Spine solves
Problem one: race conditions between agents. Without coordination, our scheduling agent would book meetings before the inquiry agent had finished collecting requirements. Customers received calendar invitations for appointments that were missing critical details. The Event Spine solved this by enforcing sequential processing for dependent operations. The scheduling agent subscribes to requirement-complete events and only acts after receiving confirmation that the inquiry agent has gathered everything needed.
