AI Agent Screenshots: What Each Image Actually Proves

Treat an AI agent screenshot as evidence of a visible state within a known capture. It can show a clipped heading or a displayed error. A success banner alone cannot establish that a record was saved in the right account or that another person can open the result.

Start with the sentence the image is meant to prove. “The confirmation message appeared” is narrower than “the task is complete.” This reference helps reviewers accept the useful observation while requesting the missing evidence for a stronger claim.

Each row names a claim, the observation a genuine relevant capture can support, and the missing check. This is not a pass/fail score for image quality. A screenshot may be sufficient for the narrow visible-state claim while remaining insufficient for a broader delivery promise.

Playwright’s screenshot documentation distinguishes full-page captures from captures of a single element. That makes the capture method consequential: a cropped button image and a full-page image do not contain the same context.

The W3C accessibility evaluation overview explains that tools cannot determine accessibility on their own and that knowledgeable human evaluation is needed. A screenshot is one input to a review, not an accessibility verdict.

Neither source validates this sixteen-case table. The table is our practical classification of what a reviewer can infer from a frame. It does not claim any particular model can reliably detect every visible defect, and it does not authenticate the file itself.

An evidence record should identify the task, the page or application, the relevant account or workspace, the time of capture and the build or document revision where available. Add the viewport size and the action immediately before capture. Those details let another reviewer understand why this image is relevant.

Retain the original capture separately from an annotated copy. Arrows and highlights can make a defect easier to explain, but record any cropping or redaction. Do not remove a warning or account label and then use the edited image to support a claim that depends on the missing context.

Protect confidential content when sharing evidence. An internal original and a redacted review copy can serve different purposes. If the recipient cannot inspect a critical detail, state that limitation rather than implying they verified it.

Suppose an agent updates a public biography. The editor screenshot shows the revised text; it is useful evidence that the editing interface displayed the change. A fresh request to the public page tests a different claim: whether the intended audience can see it. Record both if the assignment required publication.

For a saved file, keep the file itself and open it with the expected application. For a created record, retain an identifier and inspect the intended destination. Avoid treating an empty filtered list as proof of deletion. The relevant check depends on the promised outcome, not on which screenshot is easiest to obtain.

The file-output acceptance reference covers deliverable checks. The browser-or-API reference helps choose how to inspect an outcome when both interfaces are available.

If the evidence gap is keyboard behavior, another static frame may add little. Ask for a short, reproducible interaction and its result. If the gap is the saved destination, inspect that destination. If the gap is capture age, rerun the relevant check against the current revision.

Keep the review request specific: identify the unsupported clause and the smallest observation that would support it. This prevents an evidence packet from becoming a large collection of images that all show the same surface.

For appearance-focused work, the screenshot-driven development guide explains the visual critique loop. The distinction here is what you may conclude from its output.