Agentic Legal AI Is Here: What 'Proactive AI' Actually Means for Mid-Market Law Firms in 2026 — and Why Architecture Decides Whether It Will Work

The 2026 legal AI conversation has shifted from 'reactive copilots' to 'agentic AI' — systems that take action, not just answer questions. The promise is enormous; the failure mode is sharper. Here's what agentic legal AI actually is, where it works, and why most firms will need to rethink platform architecture before it pays off.