validate-fail-closed.md

Milestone — Validate and remaining silent skips

Goal: docgen validate must not pass listed segments that have no narration or that cannot pace a Manim spec. docgen manim, image-generate --all, and narration context collection must not report success while skipping the work that was requested.

Branch / PR: cursor/validate-fail-closed-2ccd

Follows scene-compile-pace.md (#79).

Shipped

• validate narration_lint fails when a listed segment has no narration file (same contract as docgen lint)
• validate story_end fails when a Manim spec has paced labels but timing.json has no words (run docgen timestamps)
• docgen manim with an empty manim.scenes list uses pipeline_manim_scene_names(); manim visual_map rows without a class name are an error
• docgen image-generate --all fails when Manim segments exist but animations/specs/ is empty
• Declared narration_from_source / extra context paths that do not exist raise instead of silently dropping files

Not this milestone

• Missing recordings stay a pre-push warning (WIP bundles without video)
• Archived Playwright / Embabel / slides