Fact-lock article sections against the visible brief

[telivity-otaip]

Summary

• Article channel gets its own system prompt and explicit ALLOWED names/figures from the BRIEF.
• Thin briefs lower per-section word aims; inventing sections are dropped from the stitch after retry.
• eval-write-article invent DQ uses the visible brief (same surface the product fact-locks to).

Test plan

• Contoso pytest for prompt, write_article, eval_write_article
• Full pytest green locally
• PP_MLX_ALLOW=1 personality-protect eval-write-article on carved holdouts

Made with Cursor

[telivity-otaip]

Local MLX eval-write-article after this change (n=4 carved holdouts):

	article	base	tie
wins	1	3	0
disqualified	3	0

Verdict: not_supported (majority + significance + DQ rate). Progress vs the prior run where both arms were invent-DQ'd on every item: one product draft cleared invent and won on cadence (1372w). Remaining DQ is still invent pressure on thin briefs for 3/4 holdouts.