Alignment path

Conformance runs through fixtures.

A behavior is portable only when it is expressible through the shared vocabulary, backed by fixtures, and validated by peer implementations.

Required shape

A conforming compact ruleset declares `format`, `owners`, `match`, `read`, and `attach`.

Invalid syntax, unknown directives, repeated singleton declarations, and unknown closed-vocabulary values produce configuration diagnostics.

Reviewable merge outcomes use named handoff concepts across UI and persistence formats.