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The design process for high-fidelity, polished work — the system prompt tells Claude to invoke it before starting any design
Passed 8 of 18 test cases with the skill, and 4 of 18 without it.
and 12 more in the full report
9 fixed1 passed either way9 still failing4 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 9 test cases the skill fixed. Same model, same prompt, with and without the skill.
When referring to option 1b inside HTML turn headers and follow-up suggestion lines in the canvas markup, what is the required HTML tag structure for that reference?
| Checked | Without skill | With skill |
|---|---|---|
| Formats option references in markup as hyperlinked anchor tags `<a class="dv-oid" href="#1b">1b</a>`. | Missed | Passed |
| Keeps option references in chat prose as plain text. | Missed | Passed |
The instructions your model reads when the skill loads.
Create a high-fidelity, polished design.
Follow this general design process (use the todo list to remember): (1) ask questions, (2) find existing UI kits and collect design context — copy ALL relevant components and read ALL relevant examples; ask the user if you can't find them, (3) start your file with assumptions + context + design reasoning (as if you are a junior designer and the user is your manager), with placeholders for the designs, and show it to the user early, (4) build out the designs and show the user again ASAP; append some next steps, (5) use your tools to check, verify and iterate on the design.
Good hi-fi designs do not start from scratch — they are rooted in existing design context. Ask the user to Import their codebase, or find a suitable UI kit / design resources, or ask for screenshots of existing UI. You MUST spend time trying to acquire design context, including components. If you cannot find them, ask the user for them. In the Import menu, they can link a local codebase, provide screenshots or Figma links; they can also link another project. Mocking a full product from scratch is a LAST RESORT and will lead to poor design. If stuck, try listing design assets and ls'ing design system files — be proactive! Some designs may need multiple design systems — get them all. Use the starter components (device frames and the like) to get high-quality scaffolding for free.
When showing multiple design options on one page, decide between (a) a single full-size responsive prototype with a tweaks panel, or (b) a vertical stack of anchored option cards. Choose based on how design-y vs prototype-y the ask is, how many options there are, and how big each is. For (b):
Present multiple design options as a vertical stack of turns — each turn of options is its own <section>, newest turn at the top, and every option gets a stable {turn}{letter} id (1a, 1b, 2a…) that the user references back in chat and you cross-link between turns. Always include <meta name="design_doc_mode" content="canvas"> in <helmet> — the host provides pan/zoom, so the user can freely zoom out on designs wider than the viewport.
How to write it — put one <style> block in <helmet>, then one <section class="dv-turn"> per turn as a direct child of the root (right after </helmet>, no wrapper). When the user asks for another round, insert the new section ABOVE the existing ones so the latest work sits at the top; never reorder, renumber, or delete earlier turns.
<helmet data-dc-atomics><meta name="design_doc_mode" content="canvas"><style>
body{margin:0;background:#f0eee9;font-family:system-ui,sans-serif}
.dv-turn{padding:40px 44px 32px;border-bottom:1px solid rgba(0,0,0,.08);scroll-margin-top:16px}
.dv-thd{display:flex;align-items:baseline;gap:10px;margin:0 0 20px}
.dv-tid{font:600 10px ui-monospace,Menlo,monospace;padding:3px 7px;background:#1a1a1a;color:#fff;border-radius:4px;text-decoration:none}
.dv-tname{font:600 13px/1.2 system-ui,sans-serif;color:#1a1a1a}
.dv-opts{display:flex;flex-wrap:wrap;gap:28px;align-items:flex-start}
.dv-opt{flex:none;display:flex;flex-direction:column;gap:9px;scroll-margin-top:16px}
.dv-oid{font:600 10.5px ui-monospace,Menlo,monospace;padding:3px 7px;background:rgba(0,0,0,.08);color:#1a1a1a;border-radius:5px;text-decoration:none}
.dv-olabel{display:flex;align-items:baseline;gap:8px;font:400 11px/1.3 system-ui,sans-serif;color:rgba(0,0,0,.55)}
.dv-card{max-width:100%;background:#fff;border:1px solid rgba(0,0,0,.08);border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,.06);overflow:hidden}
.dv-opt:target .dv-oid{background:#2a78d6;color:#fff}
.dv-next{margin:22px 0 0;font:12px/1.5 system-ui,sans-serif;color:rgba(0,0,0,.5)}
</style></helmet>
<section class="dv-turn" id="t2">
<div class="dv-thd"><a class="dv-tid" href="#t2">2</a><span class="dv-tname">Riffs on <a class="dv-oid" href="#1b">1b</a></span></div>
<div class="dv-opts">
<div class="dv-opt" id="2a"><div class="dv-olabel"><a class="dv-oid" href="#2a">2a</a>Tighter spacing</div><div class="dv-card" style="width:360px">…design…</div></div>
<div class="dv-opt" id="2b">…</div>
</div>
<p class="dv-next">Try next: "more like <a class="dv-oid" href="#2a">2a</a> but with the serif from <a class="dv-oid" href="#1c">1c</a>" · "make <a class="dv-oid" href="#2b">2b</a> full-bleed" · "new directions"</p>
</section>
<section class="dv-turn" id="t1">…turn 1, unchanged…</section>
test cases passed, vs 4 / 18 without
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