Mimir

Mimir is a self-hosted substrate designed for supervising AI agents, with a focus on regulated environments and compliance requirements. It provides a tamper-evident, Ed25519-signed audit chain that records every action, read, write, and halt performed by agents, ensuring that no detail is ever overwritten and all data remains retrievable. The platform supports bitemporal data management and allows users to branch from any audit point at datom granularity, enabling the creation of parallel timelines and the ability to commit only the desired branch. Mimir is positioned as a supervisor for AI agents, capable of spawning specialist agents on demand, learning from their actions, and providing deterministic replay and intervention at any decision point.

Key features include the ability to fork any audit point, replay decisions deterministically with byte-identical results, and export evidence packages compliant with EU AI Act Article 12, signed end-to-end for regulator verification. Mimir enforces type-checking, AST gating, and schema validation to provide deterministic guard rails for agent actions. , PUBLIC, SAFE, SENSITIVE, PII). Every operation is logged as an immutable datom in a Merkle-chained log, ensuring comprehensive end-to-end auditing across the agent fleet.

Mimir is built on persistence-os, a bitemporal, effect-typed substrate where every fact is immutable, every action is an effect, and every plan is represented as an EDN AST. 0 license. Additional paid tiers include Mimir Pro, Mimir Team, and an EU AI Act Compliance plan, each offering varying levels of retention, support, team features, and compliance capabilities. The platform is founded by Nawfal Saadi and is available as open-core software, with the substrate component licensed under AGPL-3.

Mimir targets organizations and operators that require regulated-grade supervision, traceability, and compliance for autonomous AI agent actions, particularly those subject to stringent audit and data residency requirements.