Reverse-engineer a brand's design system from its URL with Claude
He gave Claude Opus a URL and it pulled out Revolut's design system: fonts, colours, grid, components, tone of voice, design tokens and an HTML brand book (unofficial).
Source
@AmirMushich on X · 2026-10-19
Written in our own words. Credit to the original author. Link checked 2026-10-20.
What they did
He gave Claude Opus a URL and it pulled out Revolut's design system: fonts, colours, grid, components, tone of voice, design tokens and an HTML brand book (unofficial).
Result (as claimed)
20k views and 327 likes; the prompt is in the thread.
Tools they used
Cost: Claude Opus 5.5: from $4 in / $20 out per 1M tokens.
Set it up
Pick one goal and metric
For example replies to outreach, ad ideas per week or landing page conversion.
Set up the tools
Open Claude Opus 5.5. Load your offer, audience and examples of what already works.
Generate, then review
Have the agent research and draft. You approve every message, post or ad before it goes out.
Measure and iterate
Track the metric for a week, keep what works and feed the results back into the prompt.
Copy the full setup prompt
Paste into your agent and it will walk you through the setup, asking before anything that sends, posts or spends.
You are helping me set up this AI use case end to end in Claude Code. Goal: Reverse-engineer a brand's design system from its URL with Claude What the original author did: He gave Claude Opus a URL and it pulled out Revolut's design system: fonts, colours, grid, components, tone of voice, design tokens and an HTML brand book (unofficial). Reported result (as claimed by the author): 20k views and 327 likes; the prompt is in the thread. Source: https://x.com/AmirMushich/status/2112251544133337176 Tools they used: Claude Opus 5.5 Category: Marketing & growth Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Codex. Goal: Reverse-engineer a brand's design system from its URL with Claude What the original author did: He gave Claude Opus a URL and it pulled out Revolut's design system: fonts, colours, grid, components, tone of voice, design tokens and an HTML brand book (unofficial). Reported result (as claimed by the author): 20k views and 327 likes; the prompt is in the thread. Source: https://x.com/AmirMushich/status/2112251544133337176 Tools they used: Claude Opus 5.5 Category: Marketing & growth Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Grok Bot. Goal: Reverse-engineer a brand's design system from its URL with Claude What the original author did: He gave Claude Opus a URL and it pulled out Revolut's design system: fonts, colours, grid, components, tone of voice, design tokens and an HTML brand book (unofficial). Reported result (as claimed by the author): 20k views and 327 likes; the prompt is in the thread. Source: https://x.com/AmirMushich/status/2112251544133337176 Tools they used: Claude Opus 5.5 Category: Marketing & growth Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
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Guides for this use case
How to reverse-engineer and revive old devices with AI ยท How to cut AI coding agent costs and token use
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