cc-crossbeam: Skill for Claude Code

Product Demo Video

Generate 2-minute product demo videos for technical projects with parallel build options and structured critic review.

When to Use

• Demoing a GitHub repo, API, or technical product
• Need professional explainer video quickly
• Want multiple approach options (animated vs simple)

Workflow (7 Phases)

DISCOVERY → SCRIPT → PARALLEL BUILD → PARALLEL CRITICS → ITERATE → FINAL → DELIVER
   │           │           │                │              │          │         │
 5-10m      10-15m      30-60m           10-15m        0-3 loops   gate    ship it

---

Phase 1: Discovery

Clone and analyze the repo:

gh repo clone <owner/repo> /tmp/<repo>

Extract:

• What it does (1 sentence)
• Who it's for
• 3-5 key features
• Architecture/flow
• Visual assets (logos, diagrams)

Ask (or use defaults):

Question	Default
Duration	2 min
Audience	Mixed (tech + business)
Tone	Professional-conversational
Format	Animated explainer

---

Phase 2: Script

Use references/script-template.md structure:

Scene 1: Hook (0:00-0:15) — Problem statement
Scene 2: Context (0:15-0:30) — Why this matters
Scene 3-5: Features (0:30-1:30) — 3 key capabilities, 20s each
Scene 6: Technical (1:30-1:50) — Architecture/credibility
Scene 7: CTA (1:50-2:00) — What to do next

Guidelines:

• 150 words/minute
• Max 20 words/sentence
• Active voice
• Concrete over vague

---

Phase 3: Parallel Build

Spawn 2 sub-agents to build options simultaneously:

// Option A: Remotion (animated)
sessions_spawn({
  label: "demo-video-option-a",
  task: `Build animated demo video using Remotion.
  
  Script: [paste script]
  Voice: Use ElevenLabs, voice ID CcEB0ARKH8qIyzh2I1OR
  Output: /tmp/demo-video/option-a.mp4
  
  Approach:
  1. Generate voiceover per scene (ElevenLabs API)
  2. Create Remotion project with scene components
  3. Sync animations to audio timing
  4. Render at 1080p 30fps`
})

// Option B: Slides + ffmpeg (simple)
sessions_spawn({
  label: "demo-video-option-b", 
  task: `Build slide-based demo video.
  
  Script: [paste script]
  Voice: Use ElevenLabs, voice ID CcEB0ARKH8qIyzh2I1OR
  Output: /tmp/demo-video/option-b.mp4
  
  Approach:
  1. Generate voiceover (ElevenLabs API)
  2. Create slides with Puppeteer (HTML → PNG)
  3. Combine with ffmpeg, sync to audio
  4. Add simple transitions`
})