SAIHM is the candidate global standard for Sovereign AI Horizontal Memory — the memory-protocol companion to the Model Context Protocol (MCP) tool layer. The campaign is multi-track and runs in parallel across every active forum.

Position: protocol layer, not implementation. SAIHM specifies the cell shape, identity binding, encryption envelope, audit anchor, sharing contract, and cryptographic erasure semantics that any compliant AI agent memory must satisfy. Reference implementation is Apache-2.0 at @saihm/mcp-server; operators are free to build their own.