Add initial project structure with essential files
- Created .gitignore to exclude build artifacts and dependencies. - Added index.html as the main entry point for the application. - Included LICENSE file with Apache 2.0 terms. - Initialized package.json and package-lock.json for project dependencies. - Added pnpm-lock.yaml for package management. - Created QUICKSTART.md for setup instructions. - Added README.md and README.zh-CN.md for project documentation in English and Chinese.
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pftom
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---
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name: tweaks
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description: |
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Wrap any HTML artifact with a side panel of live, parameterized
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controls — accent color, type scale, density, motion, theme — that
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rewrite CSS custom properties in real time and persist to
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localStorage. Lets the user explore variants of a design without
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re-prompting the agent. Use when the brief asks for "variants",
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"side-by-side options", "tweak this", "let me adjust", "live
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knobs", or "实时调参".
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triggers:
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- "tweaks"
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- "variants"
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- "tweak panel"
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- "live controls"
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- "adjust on the fly"
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- "实时调参"
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- "可调参数面板"
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- "side panel"
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- "knobs"
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ocd:
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mode: prototype
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platform: desktop
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scenario: design
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upstream: "https://github.com/alchaincyf/huashu-design"
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preview:
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type: html
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entry: index.html
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design_system:
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requires: false
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example_prompt: "Wrap this landing page with a tweak panel — accent color, type scale, density, light/dark — persist to localStorage so the user can refresh without losing their choice."
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---
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# Tweaks Skill · 参数化变体面板
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Wrap any HTML artifact with a side panel of live controls that rewrite
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CSS custom properties in real time and persist to `localStorage`.
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Inspired by the *huashu-design* tweak pattern.
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## What you produce
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A single self-contained HTML file with two layers:
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1. **Stage** — the original artifact (landing page / deck / dashboard)
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re-keyed so all visual decisions read from CSS custom properties:
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`--accent`, `--scale`, `--density`, `--mode`, `--motion`.
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2. **Panel** — a fixed sidebar (or drawer on small viewports) with
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form controls bound to those custom properties via a tiny
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vanilla-JS bridge. Persists every change to `localStorage` keyed
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by the artifact identifier.
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The user can:
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- Open the artifact and see the stage rendered with their saved
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preferences (or sensible defaults).
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- Adjust accent / scale / density / mode / motion in the panel and
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watch the stage update instantly — no rerender.
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- Press <kbd>T</kbd> to hide / reveal the panel; <kbd>R</kbd> to
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reset to defaults.
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- Refresh the page — every choice is persisted.
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## When to use
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- The user generated something they like 80% of, and wants to dial
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in the last 20% themselves.
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- You're presenting a design system / brand and want the audience to
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feel the variants live (instead of you re-running the agent).
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- You're shipping a stand-alone demo (e.g. a portfolio piece) and
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want viewers to play.
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## When *not* to use
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- One-shot artifacts that won't be iterated on (e.g. a runbook —
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parameters don't help).
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- When the artifact's value is in fixed ratios (e.g. an infographic
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with carefully balanced data viz — knobs would degrade it).
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## The 5 standard knobs
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> Pick a subset that suits the artifact. Don't ship all 5 if only 2
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> matter — clutter is a regression.
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### 1. `--accent` — Accent color
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A select with 5–8 curated swatches (don't ship a free color picker —
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the user will pick a bad color and blame you).
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```js
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const ACCENT_PRESETS = [
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{ id: 'rust', val: '#c96442', label: 'Rust' },
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{ id: 'cobalt', val: '#2c4d8e', label: 'Cobalt' },
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{ id: 'sage', val: '#4a7a3f', label: 'Sage' },
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{ id: 'plum', val: '#7a3f6a', label: 'Plum' },
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{ id: 'graphite',val: '#3a3a3a', label: 'Graphite' },
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];
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```
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The artifact uses `var(--accent)` everywhere it had a hard-coded
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accent before. Border / link / pull-quote rule / CTA all flip
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together.
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### 2. `--scale` — Type scale (0.85 / 1.0 / 1.15)
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Three settings: *Compact* (0.85), *Normal* (1.0), *Generous* (1.15).
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All `font-size` declarations multiply by `var(--scale)` via
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`calc(... * var(--scale))`.
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Don't go beyond ±15% — beyond that the layout breaks (column flow,
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breakpoints, line counts).
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### 3. `--density` — Layout density (Tight / Normal / Roomy)
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Three settings that swap the spacing scale: *Tight* (0.75) /
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*Normal* (1.0) / *Roomy* (1.4). All `padding` / `gap` / `margin`
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declarations multiply by `var(--density)`.
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This is the highest-impact knob — it's also the most fragile, so
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**every layout-critical container must declare its base spacing in
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custom properties** before you wrap.
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### 4. `--mode` — Light / Dark
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A 2-state toggle. Sets `data-mode="light"` vs `"dark"` on the
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`<html>` element and the artifact's `:root` selector responds with
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two color sets.
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If the artifact already has a media-query-based dark mode, *replace*
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it with the data-attr version — the user's choice should win over
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their OS.
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### 5. `--motion` — Off / Subtle / Lively
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Three settings. Maps to a CSS variable `--motion-mult` that scales
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all `transition-duration` / `animation-duration` declarations:
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- *Off* — `0s` (also disables WebGL canvases / decorative animation).
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- *Subtle* — `1.0` (the artifact's authored timing).
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- *Lively* — `1.6` (slower transitions, more visible motion).
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Respect `prefers-reduced-motion`: default to *Off* if the user has
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that set, regardless of stored preference.
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## Implementation primitives
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Read `assets/wrap.html` — it ships the panel + bridge as an
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inert template. Your job is to:
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1. Take the user's existing artifact HTML.
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2. Lift its accent / mode / spacing / scale into custom properties
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(search for hard-coded `#hex` / `Npx` / `Nrem` and convert).
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3. Paste the contents into the marked region of `wrap.html`.
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4. Edit `assets/wrap.html`'s `KNOBS` array to keep only the knobs
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you decided are relevant to *this* artifact. Don't ship 5 if 2
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matter.
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5. Patch the `STORAGE_KEY` to a unique slug (`tweaks-<artifact-slug>`).
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The bridge in `wrap.html`:
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- Loads `localStorage[STORAGE_KEY]` JSON on first paint.
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- Applies values as `document.documentElement.style.setProperty('--accent', ...)`.
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- Listens to every form control's `change` event and writes back.
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- Exposes <kbd>T</kbd> (toggle panel) and <kbd>R</kbd> (reset).
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## Workflow
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### Step 1 — Acquire the artifact
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Same options as the critique skill:
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1. Project file (`index.html` in the project folder).
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2. Pasted HTML in the chat.
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3. Generated by you in this turn.
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### Step 2 — Decide which knobs apply
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Read the artifact's CSS first. For each knob, decide *yes / no*:
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- `--accent` — yes if the artifact has 1 accent color used ≥ 3 times.
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- `--scale` — yes if the artifact is type-driven (article, deck,
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pricing page).
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- `--density` — yes if the artifact has consistent gap / padding
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rhythm (deck, dashboard, landing). No for runbooks (already dense).
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- `--mode` — yes if the artifact has authored dark mode tokens, or
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you're willing to derive them.
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- `--motion` — yes if the artifact has any transition / animation
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worth scaling. No for static reports / critique reports.
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Default: **3 knobs is the sweet spot.** Five is too busy, one is
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not worth a panel.
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### Step 3 — Lift hard-coded values into custom properties
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Open `assets/wrap.html`'s `<style>` block — copy its custom-property
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naming scheme (`--accent`, `--scale`, etc.). In the user's artifact,
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find every place those concerns live and rewrite:
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- `color: #c96442` → `color: var(--accent)`
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- `font-size: 18px` → `font-size: calc(18px * var(--scale))`
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- `padding: 24px 32px` → `padding: calc(24px * var(--density)) calc(32px * var(--density))`
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- `transition: opacity 200ms` → `transition: opacity calc(200ms * var(--motion-mult))`
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If the artifact uses `clamp()` or `vw` already, multiply the
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*outer* value by the custom property — don't tear apart `clamp(...)`.
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### Step 4 — Paste into the wrap
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Copy the artifact's `<style>` and `<body>` into the marked regions
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of `wrap.html`. Keep the panel + bridge intact.
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### Step 5 — Test the loop
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Open the result, click each knob at least once, refresh the page,
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confirm the choice persists. If a knob breaks the layout —
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*remove it*, don't ship it.
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## Output contract
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```
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<artifact identifier="tweaks-<artifact-slug>" type="text/html" title="<Artifact Title> · Tweaks">
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<!doctype html>
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<html>...</html>
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</artifact>
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```
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One sentence before the artifact ("Wrapped X with a 3-knob tweak
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panel — accent / scale / mode."). Stop after `</artifact>`.
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## Hard rules
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- **Don't ship a free color picker** — only curated swatches. Users
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pick bad colors when given freedom; saving them from that is the
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whole point.
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- **Persist by artifact identifier** — `tweaks-<slug>`, not a global
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key. Two artifacts open in two tabs must not share state.
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- **Respect `prefers-reduced-motion`** — default to *Off* for motion
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if the user has that set, override only on explicit click.
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- **Single-file** — no external CSS / JS / fonts beyond the artifact's
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existing imports. Inline the panel + bridge.
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- **Panel hidden by default on viewports < 720px** — slide-in drawer
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via a "T" button at top-right.
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- **Don't ship more than 5 knobs.** Three is the sweet spot.
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