Proof levels / Reader guide

What P1, P2, P3, P4, and P5 mean.

A proof level is not a score or a brag. It is a plain way to show what kind of evidence exists right now.

Written plan

The idea or decision is written down clearly.

A note, decision log, or brief exists, but the thing is not built yet.

The work passes local checks before anyone calls it ready.

Tests, lint, build, content checks, or data checks pass locally.

The work has been reviewed on the intended screen.

A local or preview page was opened, checked, and captured in screenshots.

The work is live on the public site and has been checked there.

The production URL returns the right page, and related routes still work.

Real people have responded to it.

Feedback, user behavior, pilot notes, or audience response exists.

Plain-English rule

P4 means something is live and checked. P5 is stronger: it means real people have reacted, used it, or taught us something new.