Feature · Evidence · Written by Yobel Tzegai · Last checked 9 October 2026

How do you record every change to an AI system for the EU AI Act?

In Complipath (complipath.io), each AI system has a Change trail page: every recorded change to the system, its requirements, its classifications and its documentation, with when, who, what changed and the value before and after. The database writes the trail itself, so no screen can forget to record a change, and it downloads as a CSV.

Check your AI systems, free

What the app says it does

Shows what changed on a system, not only what its assessments said.

Illustration · not your dataWhen A date and timeWho The person who made the changeWhat A field, its value before and after

What it records

The system's own fields: name, owners, purpose, vendor, role and more.
Its requirements: status, owner, evidence link and notes.
Its classifications: a new result, a confirmation, a contest.
Its documentation: the text and its confirmation.

How it is kept

The database writes each line itself, so no screen in the app can forget to record a change, and a recording failure never blocks the save.
The page shows the most recent 500 changes. The whole trail downloads as a CSV with when, who, system, what, before and after.
It opens from the system page and from point 6 of Annex IV in the full documentation.

What it does not do

Recording starts on 13 October 2026. Earlier history stays in the assessment history and the audit log.
Creating a system, adding requirement rows, deleting and uploading evidence files are not lines in it.
A change made by Complipath itself shows as Complipath, not as a person.

Starter

€499 a month

Prices exclude VAT.

Up to 20 AI systems
Your first system is free, with no end date

Check your AI systems, free

All plans

Questions

How is the change trail different from the audit log?

The audit log is the workspace's list of who did what, across everything. The change trail is per system and records the value of each field before and after the change, for the system, its requirements, its classifications and its documentation. Both are kept; the change trail is the one point 6 of Annex IV points to.

Can someone change a system without it showing on the record?

Not through an edit to the fields it covers: the database writes each line itself when the row changes, so no screen can skip it. What it does not record is named on this page: creating a system, adding requirement rows, deletions, evidence uploads and anything before 13 October 2026.

Can we hand the trail to an auditor?

Yes. The whole change history for a system downloads as a CSV with when, who, which system, what changed and the values before and after. The audit pack carries the change history per system too, so an auditor gets it with the classifications, requirements and evidence in one file.

Which plan includes it?

Starter, at €499 a month, and the trial. Prices exclude VAT. In the app, this record is a Growth feature, included in Starter until Growth launches: Growth is not available yet, so Starter is the plan to buy, and Free does not include it.