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BlocksMedia
AI SDK Nano Banana Image Merge
AI SDK Nano Banana Image Merge
Generate, edit, and merge images using Nano Banana 2.5 Flash. Create new images from text, edit existing ones with natural language, or merge two images together. Includes version history and image comparison.
Use this when you need to combine two source images into one new composition with Nano Banana, guided by a text prompt and saved version history.
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Problems solved
Technical challenges this implementation handles out of the box.
- Merge multiple source images into a new Gemini Flash composition
- Guide composition with structured prompts and references
- Preview merged outputs for creative iteration
Use cases
Products and workflows this pattern is designed to support.
- Collage and composite generators
- Moodboard merge tools
- Campaign visual mashups
- Multi-reference product imagery
Compare with
Similar patterns, and when each one is the better fit.
AI SDK Nano Banana Image EditUse this when you need to edit an uploaded image with plain-language instructions and keep a version history to compare before and after results.
AI SDK Nano Banana ImageGenerate images using Gemini 3.1 Flash Lite Image with prompt optimization. Includes style adaptation and customizable parameters.
Brand Product Placement Generator (Nano Banana)Use this when you need to turn a brand URL into a product photography brief and several on-brand placement concepts, such as logo-on-apparel shots.
AI SDK Gemini Flash TextUse this when you want to set up Google's Gemini 2.5 Flash provider in the AI SDK for a fast, low-cost text chat or completion UI.
Setup
Requirements, wiring steps, and what this pattern adds to your project.
Getting started
Pick how you want to pull this pattern in. Then wire env vars and routes the same way.
- 1
Download → Next.js app
Use Download → Next.js app in the preview toolbar. You get a zip scaffold (Pro downloads rewrite preview `/view/.../api/*` paths to `/api/*` automatically).
- 2
Extract the zip and install dependencies
Unzip the archive, then run `pnpm install` (or npm / yarn) in the project folder.
- 3
Fill .env.local
The download includes .env.local placeholders when needed. Add real values for: GOOGLE_AI_API_KEY, AI_GATEWAY_API_KEY.
- 4
Customize the agent and tool files
Adapt prompts, tools, and stop conditions in the generated project for your product.
- 5
Run the app and open the pattern route
Run `pnpm dev`, open the setup/checklist page if present, then navigate to the generated pattern route and verify responses.
Environment variables
Capabilities
AI SDK APIs
generateTextgatewayProviders
Gemini
External services
Upstash
Files added
10 files
app/page.tsxapp/layout.tsxapp/create-image-action.tsxapp/edit-image-action.tsxapp/merge-image-action.tsxlib/rate-limit.tslib/image-utils.tshooks/use-image-version.tshooks/image-version-context.tsxREADME.md
Dependencies
11 total
npm packages
8UpstashAISDKlucide-reactNext.jsReactsonnermotionreact-dropzone
Registry components
buttondialogtextarea
Critical files
5 files
app/create-image-action.tsxServer action for image creation using gateway + Gemini flash image model.
app/edit-image-action.tsxServer action for image editing: multimodal message with image data URL + edit instructions sent to Gemini.
app/merge-image-action.tsxUnique to this block: server action that merges two images by processing both into data URLs and constructing a multimodal message with two image inputs + merge instructions.
lib/image-utils.tsExtended image processing utilities including MergeImageData type. Essential for create/edit/merge operations.
hooks/use-image-version.tsExtended state machine hook: adds merge-specific state and actions (setImage1/2, setMergedImage, merge steps). Complex multi-reducer architecture managing three operational modes.
Requirements
- Complexity
- Intermediate
- Setup time
- ~20 minutes
- Node
- 24+
- Memory
- 512MB
Upstash Redis for rate limiting
