A prompt can ask a model to follow your rules. It cannot stop the draft that breaks one.

Eighteen drafts through the gate.

Twelve were assembled by a constrained composer from four source documents. Six are what an unconstrained model hands you when the rules live only in the prompt. Watch which ones stop.

Click any row. A rejection tells you exactly what to fix.

Paste your own text. The same eight rules run on it.

Nothing here is fixture-bound. The gate takes any string. Try breaking a rule on purpose: add an invented percentage, write "guaranteed", open with "In this post I wanted to share".

Eight constraints, and why each one exists.

Six are blockers and stop a draft. Two are notes and only annotate. That split is a decision your rules file owns, not the model.

Every number above, re-derived and asserted.

These assertions pin relationships, not totals, so they keep meaning if the corpus changes. They run in your browser now, and at /api/selftest.

Run assertions