Databases Were Not Designed For This

Traditional database architecture rests on five implicit assumptions — deterministic callers, intentional writes, brief connections, loud failures, and schema as a developer contract — that agentic AI systems violate simultaneously. The post walks through each broken assumption with concrete PostgreSQL patterns: role-level statement timeouts, soft deletes with agent identity tracking, append-only event log tables with idempotency keys, dedicated connection pools with PgBouncer in transaction mode, query tagging for observability, agent-readable view layers with descriptive column comments, and least-privilege role-per-agent-type access. The argument is that patterns long treated as optional best practices become load-bearing infrastructure when AI agents replace deterministic human-authored code as the database caller.