Audit stream
An immutable Kafka event stream that records state-changing events - memory updates, policy updates, self-modification outcomes - for compliance, debugging, and replay.
The audit stream is the system's inviolable record of consequential decisions. While activity traces record what each agent concluded during deliberation, the audit stream records what actually changed: which memories were written, which policy weights shifted, which self-modification proposals were accepted or quarantined, which arbitration decisions were committed. Its immutability is the property that makes it trustworthy - events are appended and never modified or deleted within the retention window. This makes the audit stream the source of truth for compliance reviews, post-incident investigations, and replay scenarios. When a sequence of events produces an unexpected outcome, operators reset a consumer group's offset to the point before the incident and replay the exact event sequence through the processing pipeline in a controlled environment. The audit stream's consumer group is managed separately from operational consumers to ensure that replay activity for debugging never contaminates the compliance record.