Review the change. Check the environment.

A review starts with two fixed inputs.

The first input is an exact commit from your repository. The second is a recorded snapshot of the target environment. You link the repository to that environment during setup.

Proofline reads the changed code in context. Infrastructure integrations supply configuration and deployment records for supported resources. The snapshot keeps the environment evidence tied to the review, even when production changes later.

A service definition can show how many tasks a deployment requests. A database configuration can show the capacity those tasks share. The review investigates the relationship between them.

Follow the change to its dependencies.

Proofline investigates potential failure mechanisms using the code and the environment evidence available to the review. Those mechanisms include resource limits, infrastructure permissions, and network reachability.

A capacity finding needs more than an increased task count. It needs evidence about the connections each task opens and the database limit. A reachability finding needs evidence about the path between the service and its dependency.

The reviewer can run bounded code experiments in a disposable sandbox. An experiment can establish code behavior. A claim about the environment still needs recorded infrastructure evidence.

The finding explains the failure.

Supported findings appear in the pull request. Each finding explains how the change can fail, cites the evidence behind that conclusion, and suggests a change.

• The trigger. The changed code or configuration that creates the risk.
• The mechanism. The sequence that connects the change to a deployment or runtime failure.
• The evidence. The code and recorded environment facts that support the mechanism.
• The fix. A change that addresses the mechanism, with the limits of the finding kept visible.

See the simulated pull request on the homepage. It shows a service requesting more database connections than the database accepts.

Missing evidence stays visible.

A review can lack access to a resource, encounter stale evidence, or fail to reach an integration. Proofline records those gaps. An unavailable environment assessment remains incomplete.

A review with no supported findings does not establish that a deployment will succeed. Its result applies to the code, environment snapshot, and evidence it inspected.

A rerun creates a new review with its own inputs and evidence. It preserves the earlier review so you can inspect what each result refers to.

Pull request reviews are advisory. Your team decides how to address the findings and when to merge.