Explicit change
New model, provider, prompt, memory, data, tool, permission, user, purpose or autonomy level.
Vigilance does not observe isolated events alone. It compares real operation with authorised behaviour to detect change, novel trajectories and control degradation.
Drift is not limited to a new tool appearing. It also emerges when approved capabilities begin to be used with a different order, frequency, context or aggregate effect.
New model, provider, prompt, memory, data, tool, permission, user, purpose or autonomy level.
A previously inactive capability becomes active, changes frequency or touches a new class of resource.
Known tools appear in an operational order that is not part of the authorised baseline.
Actions acceptable in isolation jointly create authority, exposure or consequences that were not anticipated.
Incomplete logs, ceremonial oversight, absent owners, weakened guardrails or inability to reconstruct decisions.
Anomalies, harm, loss of traceability or Clearance expiry reopen review even when configuration appears unchanged.
A chain can cross several agents that respect their local permissions while still accumulating authority or producing an outcome that was never authorised.
Higher-impact systems return to review over time even without an incident, based on autonomy, data, scope and potential consequences.
A deviation can be legitimate. The discipline is to preserve the signal, compare it with an approved reference and decide materiality without allowing the baseline to rewrite itself.
Authorised telemetry across tools, permissions, resources, context and human intervention.
Contrast with the version, boundaries and trajectories in the Assurance Case.
Informational deviation, review required or critical signal.
Evidence, context, sequence, impact and affected controls.
Targeted ARIA, temporary restriction or human re-clearance.
A baseline that automatically absorbs every novelty may normalise errors or gradual attacks. The reference must be versioned and bounded, and its update requires evidence and approval.
A commercial, document or financial agent may remain within its individual permissions while the complete trajectory creates a decision, exposure or capability that was never authorised as a whole.
In addition to responding to change and incidents, Vigilance should trigger periodic reviews. Frequency depends on autonomy, data used, operational scope, rate of change and potential consequences.
Aegis can currently define triggers, baseline, evidence, owners and re-clearance procedures for controlled pilots. Automated sequence correlation, continuous telemetry and multi-agent detection remain capabilities under construction.
Vigilance turns deviation into evidence and evidence into a new assurance decision.