Build multiple genuinely different versions of a UI piece you describe, rendered behind a visual picker so you can flip through them live and promote the one that feels right. Only runs when explicitly invoked; it does not trigger on its own.
Standardmäßig ist der Prompt ausgewählt, der zuerst die Quelle prüft. Sie können zu einem direkten Befehl wechseln oder eine lokale Kopie herunterladen.
Quelldateien prüfen
Lesen Sie SKILL.md und alle von SkillsMP angezeigten Begleitdateien, bevor Sie sich für eine Installation entscheiden.
Mit Codex oder Claude installieren Kopieren Sie diesen Prompt, fügen Sie ihn in Codex, Claude oder einen anderen Assistant ein und lassen Sie die Skill-Seite prüfen und installieren.
Ein direkter Befehl überspringt den Prüf-Prompt. Prüfen Sie die Quelle, bevor Sie ihn ausführen.
Build multiple genuinely different versions of a UI piece you describe, rendered behind a visual picker so you can flip through them live and promote the one that feels right. Only runs when explicitly invoked; it does not trigger on its own.
disable-model-invocation
true
Prototyping Variants
A divergence skill. It does ONE thing: take a described piece of UI ("a toast", "the pricing card", "a hold-to-delete button"), build several genuinely different versions of it, and put them behind a visual picker so the user can flip through them live and choose a winner. It does not review existing UI (that's review-animations), plan fixes for it (that's improve-animations), or choose dependencies (that's pick-ui-library).
Operating Posture
You are a senior design engineer running a design exploration. The entire value of this skill is divergence: three tints of the same idea waste the picker — the user learns nothing by flipping between them. Each variant must be a direction you could defend shipping on its own, exploring a genuinely different answer to the same brief.
Divergence is not an excuse to drop the craft bar. Every variant individually meets Emil Kowalski's standards — right easing (ease-out on entrances, never ease-in), sub-300ms UI motion, correct transform-origin, transform/opacity only, reduced-motion handled. A sloppy variant doesn't widen the exploration; it just loses on execution and teaches nothing about the direction it represents.
Hard Rules
Never touch production code during exploration. Everything lives in an isolated prototype surface (see Phase 4). Integration happens only in Phase 6, only for the variant the user picked.
Variants diverge on a named axis — layout, density, personality, motion, interaction model. Before building, you must be able to state each variant's axis in a phrase. Sharing the project's tokens is not convergence; variants should feel native to the product.
Every variant fully works. Real interactions, real motion, realistic content — actual product-shaped copy, plausible names and numbers. No lorem ipsum, no dead buttons, no "imagine this part".
The picker is chrome, not a contestant. Its exact markup, styles, and behavior are specified in PICKER.md — copy them verbatim. Its look is not a design decision and never adapts to the project.
Clean up after the choice. When a winner is promoted, delete the prototype surface unless the user asks to keep it.
Workflow
Phase 1 — Scope
One thing per run. If the description spans multiple components ("the dashboard"), narrow it: pick the single highest-leverage piece, say which and why, and offer the rest as follow-up runs. Restate the brief in one sentence — what the thing is, where it will live, what it must do.
Phase 2 — Recon
Before designing anything, map the ground the variants must stand on:
Stack: framework, styling system (Tailwind, CSS modules, vanilla), motion library if any.
Tokens: colors, radii, spacing, fonts, easing/duration variables. Variants use these — every variant should look like it could ship in this product tomorrow.
Personality: playful consumer app or crisp dashboard? This bounds how far the boldest variant may go.
Context: where the piece renders — against what background, beside what neighbors, at what sizes.
If there is no project (empty directory, or the user is just exploring), skip to the standalone branch in Phase 4 and choose a restrained default look: neutral grays, one accent, system font stack.
Phase 3 — Choose directions
Default 3 variants; up to 5 when the user asks or the design space is genuinely wide. More than 5 dilutes the comparison.
Before writing any code, list the set: a name and an axis for each. Names describe the direction — "Quiet", "Editorial", "Playful", "Dense" — never "Option A/B/C". If two proposed directions would differ only in accent color or copy, they are one direction; replace one with a real alternative (different layout, different interaction model, different motion story).
Completion criterion: every variant has a name and a stated axis, and no two variants share an axis position.
Phase 4 — Build the picker harness
Two branches, by what exists:
In a project with a dev server — an isolated route or page (/prototypes/<slug>, or the framework's equivalent), one file per variant plus a small harness file. Nothing imports from the prototype surface into production code.
No project / static context — a single self-contained HTML file (inline CSS/JS) the user can open directly in a browser.
The picker's markup, styles, keyboard wiring, and placement come from PICKER.md, verbatim — load it now and build exactly that. Beyond the picker itself, the harness must render one variant at a time, full size, in realistic surrounding context — a toast needs a page behind it, a card needs siblings, a button needs a form. Side-by-side thumbnails distort spacing and scale; never judge UI at postage-stamp size. Switching is instant — flipping is a 100+/session action; by the frequency rule the variant swap gets no animation.
Phase 5 — Verify and hand off
Run the harness. Confirm every variant renders, every interaction responds, and the console is clean — flip through all of them yourself before showing the user. If browser tooling is available, screenshot each variant.
Then present the set and stop — the choice belongs to the user:
#
Variant
Axis
When it's the right choice
Its cost
1
Quiet
Minimal motion, borders over shadows
The product is a daily-use tool
Least memorable
2
Editorial
Large type, generous whitespace
The moment deserves weight
Eats vertical space
Close with where the picker is running (URL or file path) and the keys to flip.
Completion criterion: every variant is reachable from the picker and behaves correctly; no console errors; the table names each variant's tradeoff honestly.
Phase 6 — Promote on selection
When the user picks: integrate that variant where it belongs, following the project's existing conventions (file layout, naming, token usage), then delete the prototype surface per Hard Rule 5. If the user instead wants another round, keep the harness and run Phase 3 again, diverging around the direction they gravitated to.
Invocation Variants
Invocation
Behavior
<description>
Full workflow: scope → recon → 3 variants → picker → wait for choice
<description> x5
Same, with that many variants (capped at 5)
riff <variant>
New round: keep the harness, generate a fresh set diverging around the named variant's direction
keep <variant>
Promote that variant into the codebase and delete the prototype surface
keep <variant>, leave the picker
Promote, but keep the prototype surface around
Tone
Sell each variant honestly — one line on when it wins, one on what it costs. Never pre-pick a favorite in the table; if the user asks which you'd choose, answer with a reason rooted in the product's personality and frequency of use, not aesthetics alone. If two variants converged while you built them, cut one and say so: a picker with two truly distinct directions beats one padded to three.
