Turn Claude into your Interior Designer

By the end of this guide you'll have Claude set up with the Banana skill (15 min, one-time), a library of prompts for redesigning any room, and pro tips for getting results that actually look good. This is the same setup used to plan rooms before spending a dollar.

Part 1 — The Setup (One-Time, ~15 Min)

Grab the Banana skill

Go to Google and search: banana skill claude. Click the first link (the official Banana skill repo). Copy the URL.

Install it in Claude

Open Claude. Switch to Code (the developer mode option). Paste the link you just copied. Type: install this skill. Wait for the confirmation. Done.

Plug in your free Google AI Studio key

Banana uses Google's image model. Go to Google AI Studio → API keys → Create API key. Copy the key. Paste it into Claude and type: set this up. You only do this once. The free tier is generous — you'd redesign hundreds of rooms before hitting any limit.

Part 2 — Master Prompt Formula

Every redesign starts here

Upload your room photo to /banana, then paste a prompt using this formula: give Claude a clear anchor (the existing room), a clear change scope (what's allowed to change), and a clear feeling (not just a style name).

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The full master prompt and all power-user prompts are in the original guide. View on Notion →

Part 3 — The 12-Style Library

Swap any style into the master prompt

The specificity below is what gets you redesigns that don't look generic.

🌿 Cosy & Warm

Modern Japandi

Neutral palette, light woods, soft linen, low-profile furniture, minimal but warm

Cosy Farmhouse

Cream walls, woven textures, vintage finds, dried flowers, terracotta accents

Warm Minimalism

Beige + ivory + soft brown, one statement piece, lots of negative space

Coastal Grandmother

Slipcovered linen sofa, blue-and-white ceramics, woven baskets, soft natural light

🖤 Bold & Editorial

Dark Academia

Deep green or burgundy walls, brass fixtures, leather, books as decor, moody lighting

Modern Industrial

Exposed materials, matte black metal, concrete textures, leather sofa, Edison bulbs

Maximalist Eclectic

Layered patterns, jewel tones, gallery wall, mixed-era furniture, plants everywhere

Mid-Century Modern

Walnut wood, mustard + teal accents, tapered legs, geometric rug

🌸 Calm & Feminine

Soft French Apartment

Cream walls, antique mirror, ruffled linen, fresh florals, pale wood floors

Quiet Luxury

Tonal palette (one colour family), high-quality textures, no logos, restrained styling

Garden Room

Botanical wallpaper, rattan, ferns and fiddle-leaf figs, vintage botanical prints

Korean Minimalist

Pale oak, off-white walls, single ceramic vase, soft cotton bedding, low bed frame

Part 7 — Pro Tips (95% of People Skip These)

Take the photo in good light. Open all the curtains. Turn on every lamp. Claude can only redesign what it can see clearly. Bad photo = vague redesign.

Stand in the doorway, phone at eye level. Wide-angle, full-room shots beat tight crops. Claude needs to see the room's geometry.

Always ask for the same camera angle. Add to any prompt: "Show me from the same angle as my original photo." Otherwise Claude rotates the room and you can't compare.

Iterate, don't restart. Take one redesign you like and say: "Now make the sofa green instead of beige." You'll get to "perfect" 5x faster.

Ask for the why. End any redesign prompt with: "Explain in 3 bullets why this style works for this room's natural light and proportions." You'll learn design principles, not just collect pictures.

Screenshot and shop. Take the redesign Claude generates and screenshot it before you go shopping. Use it as your reference so you don't get distracted by every cute thing at Kmart.