docs(skills): cycle-d — date-time format + video asset width pitfalls#781
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Matrix v15 surfaced 2 narrow drift classes after the 3.0 GA schema sync (#773) added stricter validation: - reporting_period.start/end are ISO 8601 date-time strings per GA; date-only ('2026-04-21') now fails format validation. Added to seller + retail-media + generative-seller + creative-agent pitfall callouts. - videoAsset({...}) requires width + height per GA (previously optional). Mocks returning {url} alone fail at /creative_manifest /assets/<name>/width. Added to creative-agent + generative-seller pitfalls with concrete pixel-values example. Both are narrow GA-tightening classes. No SDK code change. Residual after this lands is storyboard-specific step expectations — the tight-loop per-pair phase.
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Summary
Matrix v15 surfaced 2 narrow drift classes after the 3.0 GA schema sync (#773) added stricter validation:
reporting_period.start/endare ISO 8601 date-time strings per GA — date-only ('2026-04-21') now fails format validation. Mocks should usenew Date().toISOString(). 4 hits onget_media_buy_delivery. Added to seller, retail-media, generative-seller, and creative-agent pitfalls.videoAssetrequireswidth+heightper GA (previously optional onVideoAsset). Mocks returning{url}alone fail at/creative_manifest/assets/<name>/width. 2 hits. Added to creative-agent + generative-seller pitfalls with concrete pixel-values example.Both are GA-tightening classes. No SDK code change.
Trajectory (same filter, same 8 pairs)
Expected v16 after merge: VALIDATION_ERROR classes → 0 on the schema axis. Residual failures will be storyboard-specific step expectations (generative quality grading, governance denial shape specifics) — the tight-loop per-pair phase I flagged at the start of Cycle A.
Test plan
npm run typecheckclean