Context: this sub-skill is one lens of the broader ui-craft skill. If the ui-craft skill is also installed, read its SKILL.md first for Discovery + Anti-Slop + Craft Test, then apply the specific lens below.

Load references/brief.md (sections 6 + Self-Correction) before proceeding.

Step 1: Capture the constraint

From the argument (or the immediately preceding correction in the conversation), capture:

What changed or is preferred — the concrete rule.
Why — the reason. Mandatory; without it the constraint can't generalize. If it isn't stated, ask one short question.
Phrase the rule so a future build can apply it without this conversation's context.

Step 2: Write it to the brief

Append a dated entry to section 6 (Learned constraints) of .ui-craft/brief.md:

remember

Step 1: Capture the constraint

Step 2: Write it to the brief