Produce Video — Multi-Runtime Export Bundle Orchestrator

Converts a brief-shortform OR brief-app-preview handoff into a runtime-agnostic export bundle. Recommends a production lane; the operator picks the engine (production-lanes.md). Capability metadata: routing.yaml. Agent table + 2 routes + 4/7 critic gates: references/agent-manifest.md.

Two modes (auto-detected from brief frontmatter type; schema in references/video-brief-schema.md § App-Preview):

• shortform — social/promo from brief-shortform. Hook-driven, narrative arc, CTA-anchored.
• app-preview — screenshot-driven product demo from brief-app-preview's handoff-produce-video.md. Composition over real UI; no synthesis.

Core question: Could any downstream runtime produce the right video from this bundle without a follow-up question?

Critical Gates — load first

Non-negotiable. Canonical: references/_shared/production-pattern.md.

1. Tool-agnostic. Stack does NOT invoke any runtime — holds no API keys. --publish / --render / --auto-run → BLOCKED — emits render-ready prompts; does not call render engines.
2. Schema-and-CTA (Gate 1). manifest.md validates against video-brief-schema.md (required fields, valid aspect, shot durations sum to total length). CTA verbatim in final shot's on_screen_text AND manifest top-level cta.
3. Brand-mark fidelity (Gate 2). No hallucinated logos. Every per-shot prompt cites assets from brand/DESIGN.md only — solid-color placeholder when missing, NEVER invented logo.
4. Caption-pace floor (Gate 3). words(on_screen_text) ÷ duration_seconds ≤ 3.0 per shot.