2026-07-18 — Acceptance-criteria sign-off is implicit in a human running

2026-07-18 — Acceptance-criteria sign-off is implicit in a human running abcd intent plan (itd-94): no ac_confirmed frontmatter field, keeping directory-as-truth pure and adding no forgeable schema surface. The gate (abcd intent ready) distinguishes only drafts vs planned; agents are barred from unattended planning at the protocol layer (run-protocol step 0 + /abcd:intent's interview script: plan is never run without the human's explicit in-session confirmation). Escalation path if violations appear: an ac_confirmed_by: field is lint-legal today and slots in as a fifth check.