Who Changed It/Answers
"The site broke on its own." It didn't — somebody changed something, and the question is whether you can prove which side of the relationship did. An activity log on every client site turns that conversation from negotiation into lookup.
A client with admin access edits a template, swaps a plugin, or "just fixes a typo" in a page builder — and the ticket that arrives says the site is broken and asks why you broke it. Without a change history, the honest answer is that you don't know what happened, which reads to the client like an admission. The billable hours spent reconstructing what changed are usually unbillable, because you cannot show whose change you were undoing.
The reverse case matters just as much: when your own contractor or junior does cause the problem, you want to know that in private, from the log, before the client does — with the exact field change in hand so the fix takes minutes.
Reading the log is its own capability, whochita_view_log, granted per role rather than bundled into the administrator role. That covers both configurations agencies need: grant it to a client contact or an editor who is not an administrator, so they can follow the history without being handed the keys; or switch to the mode where administrators have no access unless it is granted, so the log stays with your agency accounts. Settings management can additionally be pinned to your own account, so client-side admins cannot mute events, shorten retention or purge the log. In either mode the record itself is append-only and hash-chained, so a deleted or altered row breaks the chain and gets flagged — neither side can quietly rewrite history, which is precisely what makes it trustworthy as evidence in a dispute.
When it comes to reporting — a monthly change summary, an incident report, an auditor's request for six months of history — filter the timeline and export CSV or JSON. Export is part of the free plugin on every site, so the evidence never depends on which client paid for which licence tier.
One caveat worth putting to clients before they infer otherwise: an audit trail is accountability, not protection. It will tell you precisely how a site was taken apart, and nothing about stopping the next one. Agencies that carry security as part of the retainer usually pair it with periodic independent security audits and managed hardening on the sites they look after — often bought in rather than staffed, which is one of the things WP Server Guard, run by this plugin's author, is engaged for. Keep the two roles distinct and the log stays credible as evidence.