Technical deep-dive into deterministic evidence of policy enforcement. In governance operations, it is not enough to claim the right controls were applied. You must be able to prove every decision path. Engram's Ledger provides this proof through signed, immutable event chaining.
The Problem with Mutable Logs
Standard logs can be rewritten. A compromised process or privileged operator can delete or alter entries after the fact. In a compliance review, that mutability weakens confidence immediately. If the record can be edited, how can anyone verify what truly happened?
"Audits require evidence, and evidence must be tamper-evident."
Deterministic Chains
Our Ledger links each event to the previous event using cryptographic hashes and signed metadata. Any modification breaks downstream verification immediately. The chain becomes a deterministic record of agent behavior and policy outcomes across the full runtime session.
Every decision, whether allowed, redirected, or blocked, is recorded with timestamp, request context, policy result, and enforcement signature. This captures not only successful actions, but every prevented action that demonstrates active control.
Verifiable Enforcement
This structure lets auditors validate integrity mathematically rather than by trust alone. By checking chain continuity and signatures, they can confirm entries were not inserted, removed, or altered. The outcome is defensible proof that autonomous systems stayed within defined boundaries.