Multi-provider AI model router with 6 routing strategies, sovereign profile support, and cost ceiling enforcement

Tamper-evident audit trail with SHA-256 hash chaining, Ed25519 signatures, and Merkle tree anchoring

4-level guardrail middleware (none/log/pause/block) for AI agent tools with human-in-the-loop approval workflow

YAML-to-DAG workflow compiler with Kahn's topological sort, cycle detection, and parallel group identification

Bio-inspired memory for AI agents with logarithmic reinforcement, exponential decay, and composite recall scoring