Architecture AI Updates: August 27, 2026

1. Call-Level Durability and Signed History for Agent Workflows

InfoQ / Diagrid. Writing on InfoQ, Mark Silvester reports that Diagrid Catalyst 2.0 represents individual model and tool calls as durable workflow activities, checkpointing at that granularity so an interrupted agent workflow can resume without re-executing completed steps. The platform integrates with LangGraph, Microsoft Agent Framework, and Google ADK, and applies durability at call-level boundaries rather than at graph boundaries as in systems like LangGraph and Temporal. Verification builds on Dapr 1.18, which hashes batches of workflow-history events and validates chain integrity using SPIFFE-based identity, allowing tampering with execution history to be detected across cloud, on-premise, and air-gapped deployments. Source