Architecture — Infrastructure
AI Systems Need More Than Logs
Modern AI systems make decisions with legal, financial, and operational consequences. Observability records events. Logging captures output. Telemetry measures performance.
None of these establish evidence.
Keon Memory is a constitutional, append-only execution ledger designed for governed AI systems. It does not record what happened. It establishes what can be proven.
What Keon Memory Is
Append-Only Execution Ledger
Persists every governed event as an immutable SpineEvent. No mutation. No overwrite. No retroactive edits. No hidden state. Events appended in partition-scoped order, replayable deterministically.
UUIDv7 Causal Identity
Every event carries a UUIDv7 identifier. Time-ordered, monotonic, causally traceable. Correlation continuity enforced across components. Each execution has a traceable causal fingerprint.
Execution-Scoped Spine Identity
Each governed execution is assigned a single spineId. All events for that execution share the same partition, enforce strict sequence progression, and reject equal or regressing sequence numbers.
Strict Monotonic Sequence
Rejects equal sequence values, regressing sequence values, and duplicate event identifiers. History cannot be reordered, double-written, or retroactively inserted.
Ledger-First Architecture
Spine append occurs before projections, traces, or secondary artifacts. Projections are rebuildable. The ledger is authoritative. Audit history cannot be bypassed by downstream logging failure.
Deterministic Policy Binding
Every decision receipt contains a PolicyHash. SHA-256 canonical hashing, stored at issuance, verified on readback, bound to execution without re-derivation. Missing or mismatched PolicyHash halts execution.
Fail-Closed Governance
Missing policy hash → blocked. Receipt verification failure → blocked. Spine append failure → blocked. If governance breaks, execution stops.
Partition-Scoped Replay
Replay supported by (tenantId, spineId, actorId). Deterministic reconstruction, defensive copies, no mutation leakage, forensic-ready replay.
Multi-Actor Partition Readiness
Partition keys include ActorId. Designed for coordinated multi-agent systems. No global locks. No false global ordering. Scales horizontally without compromising determinism.
Logs Are Not Proof
Logs record events.
Logs can be dropped.
Logs can be reordered.
Logs do not enforce monotonic sequence.
Logs do not cryptographically bind policy.
Logs do not provide deterministic replay.
What Keon Memory Is Not
Not a log file
A log file records what happened. Keon Memory establishes what can be proven. The distinction is constitutional — not architectural preference.
Not a vector store
Vector stores enable semantic retrieval. Keon Memory enforces causal ordering and cryptographic binding. They serve different purposes and can coexist.
Not observability tooling
Observability tools tell you what happened. Keon Memory proves what was authorized to happen. Complementary — not competitive.
Keon Memory proves what happened.
Architecture
Relationship to Deterministic Execution
Keon Runtime ensures
- →Canonical JSON (JCS)
- →SHA-256 hashing
- →Ed25519-signed execution receipts, verified at the schema layer
- →PolicyHash binding
Keon Memory ensures
- →Append-only persistence
- →Monotonic enforcement
- →Replayable identity continuity
- →Fail-closed semantics
Together: governed execution substrate
Enterprise Posture
Auditability
Every governed execution produces a verifiable, replayable record. Audit is not reconstruction — it is replay.
Evidence Chain Continuity
The ledger is authoritative. Downstream logging failure cannot corrupt the audit record. Evidence is ledger-first.
Non-Repudiation Posture
Cryptographic binding to PolicyHash makes denial of execution mathematically impossible. Not asserted. Proven.
Incident Reconstruction
Evidence Packs provide self-contained proof that does not require access to the live system. Forensic-ready by design.
Regulatory Defensibility
Policy-bound receipts, monotonic sequence, and cryptographic sealing strengthen compliance posture without replacing it.
Keon Systems is designed to support SOC2 control objectives. Certification is the responsibility of the implementing organization.
Keon Memory is an append-only, partitioned, causally ordered, cryptographically anchored execution ledger for AI systems. It is the constitutional memory layer required for governed AI execution.