Architecture Decision Records

Every significant design decision in UndoLog is recorded as an ADR.

ADR	Title
0001	Rust for Effect Engine
0002	Go for MCP Proxy
0003	BLAKE3 for Call Signature Hashing
0004	PostgreSQL Advisory Locks for Tool Call Deduplication
0005	Saga Pattern for Multi-Step Rollback (Not 2PC)
0006	MCP Protocol Layer for Framework Integration
0007	Pre-Registered Compensation for Crash Safety