The briefing prompt for on-brand decks in Claude Design

I need you to reverse engineer my brand into a reusable spec. Here is what I have: [paste your website URL, and attach your logo, two or three posts or slides you like, and anything else that already looks like you].

Give me the exact hex codes you can see, and label each one with its job: page background, main text, secondary text, the single accent colour used for buttons and emphasis, and one or two supporting tones. For each text colour on each background, give me the contrast ratio so I know it is actually readable. Then identify the fonts, or if you cannot identify them, name the closest freely available web fonts and say why they match.

Finish with a short written description of the feeling: three adjectives that describe it, and three adjectives that describe what it is definitely not. Give me the whole thing as one block I can copy and paste into future prompts.

Build me a [number]-slide [pitch deck / client proposal / workshop deck] called "[title]". The audience is [who they are, what they already know, and what they are deciding]. The single thing I need them to believe by the end is [the one idea]. The action I want at the end is [what they do next].

Brand, use these exactly and do not substitute anything: background [hex], body text [hex], accent used for emphasis and buttons only [hex], supporting tones [hex and hex]. Headings in [font], body in [font]. It should feel [three adjectives] and never [three adjectives to avoid]. Copy rules: sentence case for every heading, no exclamation marks, no jargon, and headlines that state the point rather than label the slide, so "Retention is where the money leaked" instead of "Overview".

Structure: open on the problem in the audience's own words, then the shift that changed things, then my approach in [number] parts, then the proof, then the offer, then a single clear next step. One idea per slide. Anything comparative or numeric becomes a chart or a simple diagram rather than a bullet list. Keep the words on each slide to what a person can read while I am talking over them.

Before you build, show me the slide-by-slide outline as a numbered list with the real headline for each slide, and wait for me to approve it. After I approve, build the whole deck, then tell me the two slides you think are weakest and exactly what you would need from me to fix them.

Turn my brand into a reusable skill so I never have to paste my brand rules into a prompt again. Here is my brand spec: [paste the brand kit block you made earlier].

Write the SKILL.md for it. Give it a short lowercase hyphenated name based on my brand (do not put "claude" or "anthropic" in the name, or the upload gets rejected), and a description that says both what it does and when to use it, because that description is what makes you reach for it automatically. Make the description cover anything visual or written that goes out under my name: slides, documents, social posts, landing pages, email.

The instructions should hold the exact hex codes with their roles, the fonts and the size ladder, the spacing and corner radius rules, and my copy rules including sentence case headings and the words I never use. Add a short "do not" list of the generic choices I want you to avoid. When it is done, package it as a zipped folder I can upload, and tell me one sentence I can say in future to invoke it.

Do a consistency pass across the whole deck before I export it, and show me what you changed as a list.

Check that every heading uses the same font, size and case, that body text is the same size everywhere except where a size change is deliberate, that the accent colour appears only on genuine emphasis rather than decoration, and that the spacing between a heading and its body is identical on every slide. Fix anything that drifted.

Then read it as an audience member who knows nothing about me: tell me the first slide where you got confused, the slide with the most words on it, and the one slide I could delete without losing the argument.