For buyers who want rigor, the audit still rests on a fixed process. The difference is that the methodology is supporting proof now, not the first thing a visitor has to decipher.
Evidence bar
Meaningful findings must tie back to reproducible tests, observable behavior, logs, or implementation detail. No vibes, no aesthetic confidence.
Stress focus
The key distinction is not whether a system can ever fail. It is whether the system degrades, contains, recovers, and learns when failure conditions arrive.
Useful classifications
Fragile means stress compounds failure. Robust means the system returns to baseline. Antifragile means the next similar disruption goes better because the system improved.
Typical engagement
Scope, inspect, stress-test, score, and report. The exact timeline depends on system complexity, access, and whether real operating evidence is available.
Deployment integrity
Good reasoning doesn't matter if a real fix never reaches the system running it. We check whether what's live actually matches what the repo says should be live, for every deployed component, not only the primary application, and whether anything deliberately kept outside the automated pipeline still has a real way to catch drift.
Reproducibility
The same question, asked the same way twice, should come back with the same answer. We test that directly against the running system, asking it repeatedly and scoring how much the answer actually moves, rather than trusting that code merely exists which is supposed to prevent variance.