shellbot-creative-studio（贝壳机器人创意工作室）

shellbot-creative-studio

Headless creative production studio for AI agents. One skill to generate images, edit photos, create videos, produce audio, and assemble everything into polished video output via Remotion.

Philosophy: Opinionated defaults, narrow overrides. Just works with whatever API keys you have.

Commands

Read references/command-reference.md for full parameter docs.

Arguments

• Command: $0 — one of the commands above
• All args: $ARGUMENTS — forwarded to the command script

Authentication

Set one or more of these environment variables:

Nano Banana 2 auto-detects the best available backend: GOOGLE_API_KEY (preferred) > FAL_API_KEY (fal-ai/nano-banana-2) > OPENROUTER_API_KEY > infsh CLI. OpenRouter also works as a standalone image provider with access to many models — see https://openrouter.ai/collections/image-models

At minimum, set FREEPIK_API_KEY (covers all capabilities). Run providers to check what's available.

Provider auto-routing

Each command auto-selects the best provider based on available API keys. Override with --provider.

Read references/provider-matrix.md for the full model selection decision tree.

Opinionated creative workflow

This is how to think about when to use each tool. Follow this decision framework.

When to use Nano Banana 2 (Gemini) for images

Nano Banana 2 is the default for image generation because:

• Best multi-image consistency (same character, same product across scenes)
• Instruction-based editing with up to 14 reference images
• Native Google Search grounding for real-world accuracy
• Fast and cheap (~$0.067/1K image on Flash, ~$0.134 on Pro)

Use Nano Banana 2 (gemini-3.1-flash-image-preview) when:

• Ideating scene visuals (fast iteration, batch 4 variants)
• Building a visual kit (hero, alt angle, detail, background — same style)
• Editing existing images with text instructions
• Combining multiple reference images into a new composition

Use Nano Banana Pro (gemini-3-pro-image-preview) when:

• Maximum quality needed for hero shots
• Complex compositions with precise text rendering
• Final delivery assets (not just concepting)

Switch to Freepik Seedream v5 lite when:

• Fast, high-quality generation with Freepik (default Freepik model)
• You want Freepik's rendering quality without specifying a model
• Commercial-ready output

Other Freepik models (use --model):

• seedream-v4-5 — typography-heavy posters and ad creatives
• mystic — ultra-photoreal product photography (slower, higher cost)
• flux-2-klein — sub-second generation for rapid concepting

When to use Kling (video) vs Remotion

This is the most important decision. Never use AI video for what Remotion does better.

Use Kling (video command) for:

• Hero moments: product reveals, cinematic openings, emotional beats (3-8s clips)
• Organic motion that's hard to code: water, fire, fabric, hair, camera orbits
• Image-to-video: animate a still into a living scene
• Transition inserts: short clips between Remotion scenes

Use Remotion for:

• Text animations, captions, kinetic typography
• Precise timing synced to voiceover
• Brand overlays, logos, consistent color grading
• Data visualizations, metric counters, charts
• Scene transitions (cuts, wipes, dissolves — deterministic)
• Final assembly: compositing Kling clips + stills + audio + text

The ideal workflow:

1. Generate scene stills with Nano Banana 2 (consistency across scenes)
2. Animate 2-3 hero stills with Kling (cinematic motion)
3. Generate voiceover + music
4. Assemble everything in Remotion (timing, text, transitions, audio mix)

When to use the pipeline command vs manual steps

Use pipeline for standard product marketing or explainer videos where you trust the defaults. It runs the full plan-to-render sequence automatically.

Use manual steps when:

• You need to review/cherry-pick assets between steps
• The creative direction requires unusual choices
• You want to iterate on individual scenes
• You're composing a complex multi-format campaign (16:9 + 9:16 + stills)

Read references/prompt-cookbook.md for proven prompt patterns for every command — product photography, SaaS UI, transparent assets, video reveals, audio recipes, and full end-to-end examples.

Command behavior

$0 = image

Generate images with smart provider selection.

bash scripts/image.sh --prompt "Studio product shot of wireless earbuds, soft lighting" \
  --style photo --size 16:9 --resolution 2k --output hero.png

Force a specific provider or model:

bash scripts/image.sh --prompt "..." --provider freepik --model seedream-v4-5
bash scripts/image.sh --prompt "..." --provider nano-banana-2 --count 4
bash scripts/image.sh --prompt "..." --provider nano-banana-2 --model pro  # Nano Banana Pro

Nano Banana 2 models:

• gemini-3.1-flash-image-preview (default) — fast, cheap, great consistency
• pro or gemini-3-pro-image-preview — highest quality, 2x cost

$0 = edit

Edit images with 6 actions: upscale, remove-bg, inpaint, outpaint, style-transfer, relight.

bash scripts/edit.sh --input hero.png --action upscale --scale 4 --output hero-4k.png
bash scripts/edit.sh --input photo.jpg --action remove-bg --output photo-nobg.png
bash scripts/edit.sh --input scene.png --action outpaint --left 512 --right 512 --prompt "extend the landscape"

$0 = video

Generate video clips. Supports text-to-video and image-to-video.

Opinionated approach: Always generate a still first with image, review it, then animate with video --image. This gives you control over the starting frame.

bash scripts/video.sh --prompt "Product floating in space, rotating slowly" \
  --duration 5 --aspect 16:9 --output hero-clip.mp4

bash scripts/video.sh --prompt "Camera orbits around the product" \
  --image hero.png --duration 5 --output orbit-clip.mp4

$0 = voice

Generate voiceover narration.

bash scripts/voice.sh --text "Welcome to the future of productivity." \
  --voice 21m00Tcm4TlvDq8ikWAM --output vo-intro.mp3

$0 = music

Generate background music.

bash scripts/music.sh --prompt "cinematic ambient, subtle and professional" \
  --duration 45 --output music.mp3

$0 = sfx

Generate sound effects.

bash scripts/sfx.sh --prompt "soft whoosh transition" --duration 1.5 --output whoosh.mp3

$0 = remotion init

Bootstrap a Remotion project from bundled templates.

bash scripts/remotion_init.sh --template cinematic-product-16x9 --name MyProduct --output ./my-video
bash scripts/remotion_init.sh --list  # Show available templates

Templates: aida-classic-16x9, cinematic-product-16x9, saas-metrics-16x9, mobile-ugc-9x16, blank-16x9, explainer-16x9

All templates use Remotion 4.0.419 (pinned), React 18, TypeScript. Each includes npm run start (studio), npm run render, and npm run verify.

$0 = remotion render

Render a Remotion project to MP4.

bash scripts/remotion_render.sh --project ./my-video --output final.mp4 --codec h264 --crf 18

$0 = plan

Convert a creative brief into a structured storyboard.

bash scripts/plan.sh --brief "Launch video for FitPulse, a fitness app for busy professionals" \
  --framework aida --duration 45 --output storyboard.json

For AIDA framework, provide structured brief JSON:

bash scripts/plan.sh --brief-file brief.json --framework aida --output plan.json

Required AIDA fields: product_name, audience, problem, solution, use_cases (array), cta, incentive

$0 = pipeline

Run the full production pipeline: brief to rendered video.

bash scripts/pipeline.sh \
  --brief "Launch video for a new AI writing assistant targeting content creators" \
  --template cinematic-product-16x9 \
  --output-dir ./creative-output \
  --duration 45

# Dry run to preview the plan:
bash scripts/pipeline.sh --brief "..." --dry-run

# Stop before render for review:
bash scripts/pipeline.sh --brief "..." --skip-render

Pipeline steps: plan > generate images > upscale heroes > generate video clips > voiceover > music > Remotion assembly > render

$0 = providers

Check which providers are available.

bash scripts/providers.sh

$0 = status

Check async task status.

bash scripts/status.sh --task-id abc123 --provider freepik
bash scripts/status.sh --all  # Show all tracked tasks

Output convention

• JSON to stdout — machine-readable, pipe-friendly
• Colored logs to stderr — human-readable status updates
• All commands support --dry-run to preview without API calls
• Async tasks are tracked in .creative-tasks.jsonl per output directory

Remotion principles

• Remotion is the source of truth for timing, layout, animation, and render
• External tools (Freepik, ElevenLabs, Kling) generate ancillary assets only
• Transitions: 8-18 frames, purposeful (not decorative)
• Load fonts explicitly with @remotion/google-fonts
• Always run npm run verify before npm run render
• Load reference rules from references/remotion-rules/ as needed

Read references/remotion-playbook.md for detailed Remotion implementation guidance.

Local resources

Scripts (CLI commands)

• scripts/creative.sh — Main router (dispatches to sub-commands)
• scripts/image.sh — Image generation
• scripts/edit.sh — Image editing (6 actions)
• scripts/video.sh — Video generation
• scripts/voice.sh — Text-to-speech
• scripts/music.sh — Music generation
• scripts/sfx.sh — Sound effects
• scripts/remotion_init.sh — Remotion project bootstrap
• scripts/remotion_render.sh — Remotion render
• scripts/plan.sh — Brief to storyboard
• scripts/pipeline.sh — End-to-end pipeline
• scripts/status.sh — Task status checker
• scripts/providers.sh — Provider availability

References

• references/command-reference.md — Full parameter docs for every command
• references/provider-matrix.md — Provider/model decision tree
• references/creative-guidelines.md — Quality standards
• references/workflow-recipes.md — End-to-end recipe examples
• references/remotion-playbook.md — Remotion implementation guide
• references/freepik-ancillary-assets.md — Asset generation recipes
• references/template-showcase.md — Template selector guide
• references/remotion-rules-index.md — Index of 29+ Remotion rule files
• references/remotion-rules/ — Detailed Remotion rules (animations, audio, text, transitions, etc.)

Templates (Remotion projects)

• assets/templates/aida-classic-16x9/ — AIDA product marketing
• assets/templates/cinematic-product-16x9/ — Dramatic product launch
• assets/templates/saas-metrics-16x9/ — B2B dashboard metrics
• assets/templates/mobile-ugc-9x16/ — Vertical social (Reels/TikTok)
• assets/templates/blank-16x9/ — Minimal starter
• assets/templates/explainer-16x9/ — 5-scene how-it-works