DESIGN.md@brand/showcase/app-screens/08-podcast-player · diff

alpha to alpha

28 added, 24 removed. Audit A to A.

---

version: alpha

name: "Undertow"

description: "Design system generated by OpenDesigner"

colors:

primary: "#a9c4ff"

on-primary: "#222428"

surface: "#fcfdff"

on-surface: "#222428"

error: "#be554c"

typography:

body-md: { fontFamily: "Hanken Grotesk", fontSize: 17px, lineHeight: 24px }

rounded:

control: 0px

container: 0px

spacing:

unit: 4px

---

# Undertow

**Undertow** is a design system; what it is for is not recorded yet (Q-scope-01).

- **For:** people who use it often, as an everyday app

- **Screens:** something people explore and enjoy

- **Runs on:** ios

- **Feel:** sophisticated (premium; picked for you)

- **Brand color:** Your brand color (#A9C4FF) is on the buttons exactly, with dark text on it, because white text would be too faint.

- **Decided:** 1 answer you gave, 4 picked for you; everything else uses sourced defaults

- **Standards:** 339 house standards followed (locked, house standards v2); see the Standards section

- **Next:** zoom into Colors, Typography, Layout, or stop here: each level works

- **Licence risks:** none found

> Generated by the OpenDesigner engine 1.0.0 from `opendesigner/state.json` and `opendesigner/decisions.md`; `opendesigner/tokens/` is the source of truth. Change the system with `engine.py set ...` and `engine.py build`, not by editing this file (notes inside `` blocks survive). Each section opens with one plain sentence; open **More** for the designer and engineer detail.

## Overview

> Zoom: sketch (0 of 3), 6 decisions in this area. To zoom in, answer Q-dir-01, Q-dir-02.

**Undertow feels premium. Screens are comfortable, in a flat style.**

Designers: visual style: flat, tonal, glass · Code: `preset in state.json`

**Your answers here** (each one either sets tokens or is a rule for this section):

- What are these screens mostly for: selling, getting work done, reading, or enjoying an experience? **Experience** (delegated; tokens; Q-scope-06)

**Intent.** A design system generated from eight dials and a few raw inputs.

- Audience: people who use it often, as an everyday app

- The memorable thing: not recorded yet (Q-brand-02)

- Surfaces: something people explore and enjoy

- Platforms: ios; inputs: pointer, touch

- Direction: preset flat2 (the default until Q-dir-01 is answered); feel premium (words picked for you: sophisticated)

**Principles (ranked).**

No principles recorded yet (Q-brand-07). Until they are, the dials act as the tie-breakers below.

**Dial positions.** Three posture dials set the overall stance. Five character dials fine-tune it.

- **Expression 75/100** (productive to expressive: expressive): type ratio 1.333, hero moments: 1-2-per-product, expressive motion: throughout, brand color role: brand-chrome-allowed, containment: visible-containers.

- **Brand presence 60/100** (native to brand-led: leaning brand-led): typeface suggestion: open-custom-face, brand color placement: accent+signature-surface, native component share about 64%, voice guidance: short.

- **Density 45/100** (spacious to compact: balanced): body 16px on the web, default control 40px, density mode comfortable, icons 20px; hit areas never shrink.

- **Energy 35/100** (calm to energetic: leaning calm): standard easing [0.77, 0, 0.175, 1], duration multiplier 0.94, spring damping 1.0, heading weight 650, navigation: neutral.

- **Roundness 6/100** (sharp to soft: sharp): control radius 0, icon corners sharp, caps square.

- **Depth 15/100** (flat to deep: flat): depth model: borders.

- **Colorfulness 30/100** (monochrome to vivid: monochrome): scheme neutral, accent chroma 36.7 (HCT), 2 accent(s), surfaces: neutral+one-accent.

- **Warmth 18/100** (cool/formal to warm/friendly: cool/formal): neutral tint chroma 0.032 at hue 264, borders: strong-rules, title-case, contractions none.

**Zoom by area** (sketch, broad, defined, detailed). You can stop at any level; each one works.

| Area | Zoom | Next questions |

|---|---|---|

| Colors | sketch | Q-color-02 |

| Typography | sketch | Q-type-01 |

| Layout | sketch | Q-space-01, Q-space-02, Q-space-03 |

| Elevation & Depth | sketch | Q-depth-01 |

| Shapes | sketch | Q-shape-01 |

| Components | sketch | Q-comp-01, Q-comp-02, Q-state-01 |

| Motion | sketch | Q-motion-01 |

| Modes and Themes | sketch | Q-theme-01, Q-theme-03 |

| Iconography and Imagery | sketch | Q-icon-01, Q-icon-02, Q-icon-06 |

| Content and Voice | sketch | Q-voice-01, Q-voice-02, Q-voice-03 |

| Accessibility | sketch | Q-aud-02, Q-aud-03, Q-aud-04 |

| Platforms and Devices | sketch | Q-plat-05, Q-plat-10, Q-plat-08 |

The tokens in `opendesigner/tokens/` (DTCG 2025.10 with `opendesigner.resolver.json`) are the source of truth. This file is a generated view.

Decisions: D-0002 (answers.Q-aud-01), D-0007 (macros), D-0010 (dials.expression), D-0011 (dials.brandPresence), D-0012 (dials.density), D-0026 (answers.Q-scope-06).

</details>

## Colors

> Zoom: sketch (0 of 3), 5 decisions in this area. To zoom in, answer Q-color-02.

- **Two accent colors: your brand color `#A9C4FF` (exactly) marks buttons, links and focus; `#4b6aeb` adds highlights.** Everything else stays neutral.

+ **Two accent colors: your brand color `#A9C4FF` (exactly) marks buttons, links and focus; `#2f45c8` adds highlights.** Everything else stays neutral.

Designers: primary or brand accent · Code: `color.bg.accent`

- **Intent.** Brand color `#A9C4FF` drives the accent ramp's hue; the Colorfulness dial (30) sets its chroma (scheme neutral, peak HCT chroma 36.68). The brand's role is **brand-chrome-allowed** and it sits closest to accent step 9. Your brand color #A9C4FF is on the buttons exactly (dark text on it, because white text would be too faint).

+ **Intent.** Brand color `#A9C4FF` drives the accent ramp's hue; the Colorfulness dial (30) sets its chroma (scheme neutral, peak HCT chroma 36.68). The brand's role is **brand-chrome-allowed** and it sits closest to accent step 9. Your brand color #A9C4FF is on the buttons exactly (dark text on it, because white text would be too faint). Your second color #2F45C8 is exact on its fills; in dark mode they use #587AFC, a lighter shade of it.

**How ramps are built.** Each hue gets twelve steps in OKLCH, placed by contrast. Step 8 reaches at least 3:1 (edges and focus). Steps 10 and 11 reach the text minimum on backgrounds 1-4. Step 12 reaches at least 7:1. Steps 2-6 are spaced evenly in lightness between step 1 and step 7. Light and dark ramps are solved separately. Dark solids are lighter and carry dark text (dark mode is a separate mapping, never an inversion). Text minimum: 4.5:1 (WCAG 2.2 AA).

| Ramp | Light steps 1-12 | Solid carries |

|---|---|---|

| `accent` | `#fcfdff` `#f2f4f9` `#e7ecf6` `#dbe3f4` `#d0dbf1` `#c5d2ef` `#bacaec` `#7386b0` `#a9c4ff` `#9bb4ec` `#4f6491` `#2a3449` | dark |

- | `accent2` | `#fcfdff` `#f0f4ff` `#e4ebff` `#d8e3ff` `#ccdaff` `#c1d1ff` `#b5c9ff` `#6481e1` `#4b6aeb` `#425fd8` `#364eb7` `#233162` | light |

+ | `accent2` | `#fcfdff` `#f0f4ff` `#e4ebff` `#d8e3ff` `#ccdaff` `#c1d1ff` `#b5c9ff` `#6481e1` `#2f45c8` `#283bb2` `#25389f` `#233162` | light |

| `danger` | `#fffcfc` `#fcf2f1` `#fce7e4` `#fcdcd7` `#fcd0ca` `#fcc5be` `#fbb9b1` `#c07067` `#be554c` `#ad4b43` `#913c35` `#512824` | light |

| `info` | `#fbfdff` `#edf5fb` `#ddeefa` `#cce7fa` `#bbdffa` `#a9d8fa` `#97d0f9` `#3e8dbf` `#007cb7` `#0070a6` `#005c8a` `#0b3751` | light |

| `neutral` | `#fcfdff` `#f0f4fe` `#e6ebf8` `#dce3f3` `#d3daee` `#c9d2e8` `#bfc9e3` `#7b86a0` `#6a7592` `#596480` `#4e576f` `#222428` | light |

| `success` | `#fafefb` `#eff6f0` `#e0efe2` `#d1e9d5` `#c2e2c7` `#b3dcba` `#a3d5ad` `#529462` `#228644` `#1a793b` `#10652f` `#183b21` | light |

| `warning` | `#fffcf9` `#f8f4ed` `#f4eadc` `#f0e1ca` `#ecd8b8` `#e8cfa6` `#e3c594` `#a5803d` `#e9b453` `#d7a54a` `#845d00` `#44310c` | dark |

**Step-distance guarantee** (neutral, light; WCAG contrast of a foreground step on background steps 1-5):

| Foreground | on 1 | on 2 | on 3 | on 4 | on 5 |

|---|---|---|---|---|---|

| neutral 8 | 3.58 | 3.31 | 3.06 | 2.83 | 2.61 |

| neutral 9 | 4.51 | 4.17 | 3.85 | 3.57 | 3.29 |

| neutral 10 | 5.80 | 5.36 | 4.95 | 4.59 | 4.22 |

| neutral 11 | 7.07 | 6.54 | 6.04 | 5.60 | 5.15 |

| neutral 12 | 15.27 | 14.12 | 13.03 | 12.08 | 11.13 |

**States.** Hover is at least 1.15:1 from its fill and pressed at least 1.3:1, as shade steps (DC-L01-17). Where a color is unknown at design time, use the state opacities in `opacity.state.*`.

|---|---|---|---|

**Semantic roles** (use these, never the ramps):

|---|---|---|---|

- | `color.bg.accent2.bold-hover` | `#425fd8` | `#6b8bf5` | Hover: one step, at least 1.15:1 from the solid (DC-L01-17). |

- | `color.bg.accent2.bold-pressed` | `#3b56ce` | `#7595ff` | Pressed: at least 1.3:1 from the solid. |

+ | `color.bg.accent2.bold` | `#2f45c8` | `#587afc` | accent2 solid fill. |

+ | `color.bg.accent2.bold-hover` | `#283bb2` | `#688aff` | Hover: one step, at least 1.15:1 from the solid (DC-L01-17). |

+ | `color.bg.accent2.bold-pressed` | `#2232a9` | `#7595ff` | Pressed: at least 1.3:1 from the solid. |

| `color.bg.danger.bold` | `#be554c` | `#c26c63` | Danger solid fill. |

| `color.bg.danger.bold-hover` | `#ad4b43` | `#d1796f` | Hover: one step, at least 1.15:1 from the solid (DC-L01-17). |

| `color.bg.danger.bold-pressed` | `#a4433b` | `#db8379` | Pressed: at least 1.3:1 from the solid. |

| `color.bg.info.bold` | `#007cb7` | `#318bc2` | Info solid fill. |

| `color.bg.info.bold-hover` | `#0070a6` | `#4198d0` | Hover: one step, at least 1.15:1 from the solid (DC-L01-17). |

| `color.bg.success.bold` | `#228644` | `#4a925c` | Success solid fill. |

| `color.bg.success.bold-hover` | `#1a793b` | `#579f68` | Hover: one step, at least 1.15:1 from the solid (DC-L01-17). |

| `color.bg.success.bold-pressed` | `#097133` | `#61a972` | Pressed: at least 1.3:1 from the solid. |

| `color.bg.warning.bold` | `#e9b453` | `#e1b66d` | Warning solid fill. |

| `color.bg.warning.bold-hover` | `#d7a54a` | `#f2c67c` | Hover: one step, at least 1.15:1 from the solid (DC-L01-17). |

- | `color.border.accent` | `#7386b0` | `#6f81a9` | Selected card or accent outline. |

+ | `color.border.accent` | `#7386b0` | `#6b81b1` | Selected card or accent outline. |

| `color.border.danger` | `#c07067` | `#b86d65` | Danger boundary, for example an invalid field (3:1). |

| `color.border.default` | `#7b86a0` | `#76809a` | Outlines (strong rules). |

| `color.border.input` | `#7b86a0` | `#76809a` | Text field and select borders (3:1, DC-L01-16). |

| `color.border.strong` | `#7b86a0` | `#76809a` | Boundaries that are the only cue: inputs, checkboxes, switches (3:1, WCAG 1.4.11). |

| `color.border.success` | `#529462` | `#528e60` | Success boundary, for example an invalid field (3:1). |

| `color.border.warning` | `#a5803d` | `#9f7c3e` | Warning boundary, for example an invalid field (3:1). |

| `color.icon.on-accent` | `#222428` | `#131519` | Icons on solid accent fills. |

| `color.icon.subtle` | `#596480` | `#8995b3` | Decorative icons. |

| `color.overlay.scrim` | `#222428 @0.45` | `#000000` | Modal backdrop (DC-L04-18; Q-depth-06). |

| `color.text.danger` | `#913c35` | `#ea968c` | Danger text and icons; pair with an icon or label (DC-L01-15). |

| `color.text.disabled` | `#7b86a0` | `#76809a` | Disabled labels; exempt from contrast minimums (WCAG 1.4.3 exception). |

| `color.text.info` | `#005c8a` | `#65b4e9` | Info text and icons; pair with an icon or label (DC-L01-15). |

| `color.text.on-accent` | `#222428` | `#131519` | Text and icons on color.bg.accent.bold* (auto-picked light or dark, S-L06-094). |

| `color.text.on-action` | `#222428` | `#131519` | Text on the primary action fill. |

| `color.text.on-brand` | `#222428` | `#131519` | Text on color.bg.brand. |

| `color.text.on-warning` | `#222428` | `#131519` | Text on bg.warning.bold. |

| `color.text.success` | `#10652f` | `#77ba86` | Success text and icons; pair with an icon or label (DC-L01-15). |

| `color.text.tertiary` | `#596480` | `#8995b3` | Captions and placeholders (still meets the text minimum on surfaces 1-4). |

| `color.text.warning` | `#845d00` | `#f9d08c` | Warning text and icons; pair with an icon or label (DC-L01-15). |

**Use / avoid.**

- Use one solid accent fill per view for the primary action; spend chroma on small, meaningful elements.

- Avoid gray text on colored fills; use the matching `text.on-*` role.

- Avoid color as the only signal: pair status colors with an icon or label.

- Charts: no chart palette yet (Q-color-19). Take chart colors from the status and accent hues, and check them separately.

**Tailwind classes:** `bg-action-primary`, `hover:bg-action-primary-hover`, `active:bg-action-primary-pressed`, `text-on-action`, `bg-surface-base`, `bg-surface-raised`, `text-fg-primary`, `text-fg-secondary`, `text-fg-link`, `border-line-subtle`, `border-line-input`, `outline-line-focus`, `bg-danger-bold`.

Decisions: D-0016 (dials.colorfulness), D-0029 (raw.brandColor), D-0030 (raw.secondaryColors), D-0031 (raw.neutralBase), D-0032 (dials.warmth).

</details>

## Typography

> Zoom: sketch (0 of 3), 4 decisions in this area. To zoom in, answer Q-type-01.

**Body text is 17px, and each larger size is about 1.333 times the one below.**

Designers: type scale: base size and ratio · Code: `font.size.14`

**Intent.** Body text is 17px; sizes follow `round(17 x 1.333^n)` for n from -2 to 6, reaching about 5.5x body (marketing surfaces in scope). Sizes: 13, 17, 23, 30, 40, 54, 72, 95px.

- Text face: Hanken Grotesk, system-ui, -apple-system, Segoe UI, Roboto, Helvetica Neue, Arial, sans-serif. Licence status (hook H-type): **pending**.

- Licence by platform: text: Hanken Grotesk (open licence or system font: web, apps and self-hosting); display: Newsreader: licensed for web, apps, self-hosting.

- On iOS the Swift file uses Dynamic Type text styles (body 17 pt), so text follows the person's text size setting; Compose uses sp, which follows the Android font scale.

- Weights: body 400, label 500, heading 650, display 750 (two or three distinct weights per view).

- Emphasized variants (Expression 75, on from 67): 11 styles under `text.emphasized.*`, the same size one weight heavier, for the selected item, key actions and headlines (DC-L02-11).

- Line heights snap to a 4px grid: 1.5 up to 17px, 1.4 to 26px, 1.25 to 44px, 1.12 above.

- Letter spacing: +0.02em at 11-12px, -0.01em from 32px, -0.02em from 48px.

- Text scaling: CSS sizes are rem, line heights unitless, so text scales to 200% (WCAG 1.4.4); containers must grow with it.

- Scripts: Latin only; add scripts in raw.scripts to get per-script line heights (DC-L02-25).

|---|---|---|---|---|

| `text.body.lg` | 23/32 | 400 | 0em | Long-form reading, onboarding copy. |

| `text.body.md` | 17/24 | 400 | 0em | Default UI text: forms, tables, descriptions. |

| `text.body.sm` | 13/20 | 400 | 0em | Helper text, timestamps, captions. |

| `text.code.md` | 17/24 | 400 | 0em | Code blocks, token names. |

| `text.code.sm` | 13/20 | 400 | 0em | Inline values, dense code rows. |

| `text.display.sm` | 95/108 | 750 | -0.02em | One hero line per page: marketing, empty states. |

| `text.headline.lg` | 72/80 | 650 | -0.02em | Page and section titles. |

| `text.headline.md` | 54/60 | 650 | -0.02em | Page and section titles. |

| `text.headline.sm` | 40/48 | 650 | -0.01em | Page and section titles. |

| `text.label.lg` | 17/24 | 500 | 0em | Button and control labels. |

| `text.label.md` | 13/20 | 500 | 0em | Small control labels, badges, dense tabs. |

| `text.title.lg` | 30/36 | 650 | 0em | Card, panel and group titles. |

| `text.title.md` | 23/32 | 650 | 0em | Card, panel and group titles. |

| `text.title.sm` | 17/24 | 650 | 0em | Table headers, field-group titles. |

**Use / avoid.**

- Use at most three sizes and two weights in one view; let color and weight carry hierarchy before size.

- Avoid all caps for sentences and in scripts without case; use weight for emphasis there.

**Tailwind classes:** `text-body-md`, `text-label-lg`, `text-title-md`, `text-headline-md`.

Decisions: D-0018 (raw.textFace), D-0027 (raw.baseSize), D-0033 (raw.displayFace), D-0034 (raw.monoFace).

</details>

## Layout

> Zoom: sketch (0 of 3), 1 decision in this area. To zoom in, answer Q-space-01, Q-space-02, Q-space-03.

**Spacing comes in steps of 4px, and screens use comfortable spacing by default.**

Designers: spacing scale, 0 to 96 · Code: `space.0 to space.96`

**Intent.** Everything sits on a 4px unit: ladder 0, 2, 4, 6, 8, 12, 16, 20, 24, 32, 40, 48, 64, 80, 96. Density is a mode on the semantic layer (default **comfortable**). Primitives and minimum tap areas never change.

- |---|---|---|---|---|

- | spacious | 6 / 12 / 16 / 20 / 32 | 64 / 80 / 96 | 40 / 48 / 56 | 3.5 |

- | comfortable (default) | 4 / 8 / 12 / 16 / 24 | 32 / 40 / 64 | 32 / 40 / 48 | 2.5 |

- | compact | 2 / 6 / 8 / 12 / 20 | 16 / 24 / 40 | 24 / 32 / 40 | 2.0 |

+ |---|---|---|---|---|---|

+ | spacious | 6 / 12 / 16 / 20 / 32 | 64 / 80 / 96 | 40 / 48 / 56 | 52 / 56 / 64 / 80 | 3.5 |

+ | comfortable (default) | 4 / 8 / 12 / 16 / 24 | 32 / 40 / 64 | 32 / 40 / 48 | 44 / 48 / 56 / 72 | 2.5 |

+ | compact | 2 / 6 / 8 / 12 / 20 | 16 / 24 / 40 | 24 / 32 / 40 | 36 / 40 / 48 / 64 | 2.0 |

- Target sizes: pointer 24px, touch 44px; `size.target.min` is the floor for the primary input, and `space.target.gap` separates adjacent targets.

- Inner gaps stay below outer gaps (at least half), so grouping reads without borders (L15 P16).

- Breakpoints and grid: not generated yet; use the platform defaults and keep layout spacing independent of density (DC-L03-17).

**Use / avoid.**

- Parents own spacing (padding and gap); children never set outer margins.

- Avoid values off the ladder; if one is needed, add it as a decision.

Decisions: D-0012 (dials.density).

</details>

## Elevation & Depth

> Zoom: sketch (0 of 3), 1 decision in this area. To zoom in, answer Q-depth-01.

**Surfaces are separated by thin borders, with no shadows.**

Designers: flat, shadowed, tonal or glass · Code: `$extensions.opendesigner.model`

**Intent.** Depth 15/100 selects the **borders** model. Shadow alpha in light mode is 0.0; dark mode doubles it and lifts surfaces by lightness instead (sunken, base, raised, overlay).

| Token | Layers (x y blur spread) | Use |

|---|---|---|

| `elevation.raised` | none | Cards that lift on hover, sticky headers, dragged rows. |

| `elevation.floating` | none | Menus, popovers, dropdowns. |

| `elevation.overlay` | none | Dialogs and sheets (with color.overlay.scrim). |

- Borders: 1px default, 2px selected and focus, 4px emphasis; width changes use an inset shadow so layout does not jump.

- Stacking: page < raised < floating (menus) < overlay (dialogs with `color.overlay.scrim`).

- No materials or glass in this system.

Decisions: D-0015 (dials.depth).

</details>

## Shapes

> Zoom: sketch (0 of 3), 1 decision in this area. To zoom in, answer Q-shape-01.

**Buttons and fields have 0px corners; cards have 0px corners.**

Designers: corner radius, sharp to pill · Code: `radius.control, CSS border-radius`

**Intent.** Roundness 6/100 gives controls a **0** radius; details 0px, containers 0px, overlays 0px, people full. Controls under 32px tall use `radius.control-sm` (0).

- Nested radius: inner = max(outer - padding, smallest step). Here it is 0px inside a container with `space.inset.lg` padding. Equal radii on nested shapes look uneven (DC-L04-05).

- Focus ring: 2px, 2px offset, radius = control radius + offset (0).

- Icons: sharp corners, square caps. On iOS, use continuous corners (DC-L04-04).

- Signature shapes: none generated; a brand shape library is a designer asset (hook H-motif).

Decisions: D-0014 (dials.roundness).

</details>

## Components

> Zoom: sketch (0 of 3), 0 decisions in this area. To zoom in, answer Q-comp-01, Q-comp-02, Q-state-01.

**Version 1 plans 25 components, all built from these tokens.**

Designers: core set of about 25 components · Code: `button.* (proposed), APG pattern`

**Intent.** v1 components use the semantic tokens only. Base: not chosen yet (Q-comp-01). Buttons are 40px tall (comfortable), 0 radius, `text.label.lg`; one primary action per view.

| Component | Status |

|---|---|

| button | planned (tokens ready) |

| text-field | planned (tokens ready) |

| textarea | planned (tokens ready) |

| select | planned (tokens ready) |

| checkbox | planned (tokens ready) |

| radio | planned (tokens ready) |

| switch | planned (tokens ready) |

| slider | planned (tokens ready) |

| tabs | planned (tokens ready) |

| tooltip | planned (tokens ready) |

| popover | planned (tokens ready) |

| dialog | planned (tokens ready) |

| menu | planned (tokens ready) |

| progress-bar | planned (tokens ready) |

| spinner | planned (tokens ready) |

| banner | planned (tokens ready) |

| badge | planned (tokens ready) |

| avatar | planned (tokens ready) |

| card | planned (tokens ready) |

| list | planned (tokens ready) |

| table | planned (tokens ready) |

| link | planned (tokens ready) |

| breadcrumbs | planned (tokens ready) |

| side-navigation | planned (tokens ready) |

| accordion | planned (tokens ready) |

**Contested policies:** Validation timing and disabled submit: pending; Field style: pending; Toasts: pending; Undo versus confirm: pending; Danger actions: pending; Button emphasis levels: pending.

**Use / avoid.**

- Every interactive component shows hover, pressed, focus-visible and disabled states from the tokens.

- Inputs keep a 3:1 boundary (`color.border.input`); signifier strength: balanced.

- Component docs belong in `opendesigner/components/<name>.md` (spec 7.8).

Decisions: none recorded yet; values are defaults from references/levers.json.

</details>

## Do's and Don'ts

**These rules keep screens clear and easy to read.** The engine checks the ones it can.

Designers: guardrails and design linting · Code: `engine.py validate, engine.py review`

**Enforced by construction.** The generator cannot break these:

- text contrast 4.5:1, and 3:1 for edges, in every mode

- text on colored fills picked automatically

- tap areas pointer 24px, touch 44px

- a 2px focus ring with a 2px offset

- a reduced-motion mode

- inner spacing smaller than outer spacing, three text colors, and nested radii

**Do**

- Use semantic tokens; never raw hex, px or ms values in components.

- Keep one primary action per view and at most three type sizes per view.

- Pair every status color with an icon or label; underline links in running text.

**Don't**

- Don't shrink hit areas in dense layouts; shrink visuals and extend the hit area.

- Don't use motion as the only signal, or flash more than three times a second.

- Don't copy another brand's identity from a reference (colors, typeface, logo, imagery, copy).

- **Current validation findings:** warn: light: color.bg.action.primary (#a9c4ff) on color.surface.base (#fcfdff) is 1.72:1, needs 3.0:1, warn: light: color.bg.action.primary (#a9c4ff) on color.surface.raised (#ffffff) is 1.75:1, needs 3.0:1

+ **Current validation findings:** warn: light: color.bg.action.primary (#a9c4ff) on color.surface.base (#fcfdff) is 1.72:1, needs 3.0:1, warn: light: color.bg.action.primary (#a9c4ff) on color.surface.raised (#ffffff) is 1.75:1, needs 3.0:1, warn: 11 text sizes; 8 to 10 is the usual range

**Waivers:** none.

</details>

## Standards

**Follow these rules when you build.** They come from sources marked non-negotiable, their values are locked, and `engine.py review` checks the ones it can.

House standards v2: 339 rules followed in this project.

**Don't break these:**

- No motion on 100+ times-a-day actions (STD-when-to-animate-05).

- Never use ease-in on UI (STD-easing-duration-03).

- Never enter from scale(0) (STD-enter-exit-origin-01).

- Never block input during transitions (STD-springs-gestures-13).

- Never rely on haptics alone (STD-accessibility-motion-20).

<details><summary>Every theme (185 rules)</summary>

- **When to animate** (15 rules, 13 must): Decide whether to animate first; Name a valid purpose for every animation; Scale motion down as frequency rises; No motion on 100+ times-a-day actions; Never animate keyboard-initiated actions; Remove or shrink motion seen tens-of-times daily; Spend delight only on rare moments; Explanatory motion only in marketing, onboarding; and 5 more must rules. Locks `motion.duration.instant` 0ms.

- **Easing and duration** (12 rules, 10 must): Pick easing by the motion's job; Strong custom curves, not built-in keywords; Never use ease-in on UI; UI motion under 300ms unless justified; Duration budget for each element; Nothing over 1s unless illustrative; Duration grows with size and distance; Slow deliberate phase, snappy response; and 2 more must rules. Locks `motion.easing.linear` [0, 0, 1, 1], `motion.easing.hover` [0.25, 0.1, 0.25, 1], `motion.easing.enter` [0.23, 1, 0.32, 1], `motion.easing.exit` [0.23, 1, 0.32, 1], `motion.easing.standard` [0.77, 0, 0.175, 1], `motion.duration.micro` 100ms, `motion.duration.short` 150ms, `motion.duration.medium` 200ms, `motion.duration.long` 250ms.

- **Enter, exit and origin** (10 rules, 7 must): Never enter from scale(0); No opacity-only fade entrances; Exit the way it entered; Stagger group entrances 30–80ms; Measure heights, never animate to auto; React Native: never animate header height; No entering on virtualized rows. Locks `motion.scale.enter` 0.95, `motion.duration.stagger` 50ms.

- **Springs and gestures** (28 rules, 19 must): Springs for anything a finger drives; Default springs are critically damped; Bounce only after a momentum gesture; Keep bounce subtle, 0.1 to 0.3; Sheet and drawer spring values; Every animation can be grabbed mid-flight; Never block input during transitions; Start from the on-screen value; and 11 more must rules. Locks `motion.spring.spatial.dampingRatio` 1.0, `motion.spring.spatial.stiffness` 246.7, `motion.spring.momentum` a composite value (see standards.md), `motion.spring.sheet` a composite value (see standards.md), `motion.spring.rotation` a composite value (see standards.md), `motion.gesture.deceleration-rate` 0.998, `motion.gesture.dismiss-velocity` 0.11, `motion.gesture.rubberband-constant` 0.55, `motion.gesture.direction-threshold` 10px.

- **Performance and properties** (9 rules, 7 must): Animate only transform and opacity; Only clip-path, accordion height, childless width; Keep per-frame values out of React state; Pick the cheapest animation tool; Treat dropped frames as a regression; Keep React Native motion on the UI thread; Crossfade static layers, not elevation or blur.

- **Accessibility in motion** (9 rules, 5 must): Ship reduced motion with the animation; Reduced motion is gentler, never zero; Scale layout with the user's text size; Never rely on haptics alone; Never trap the user in an overlay. Locks `raw.reducedMotion` "replace", `motion.duration.reduced-fade` 200ms, `reduced:motion.transition.enter` a composite value (see standards.md), `reduced:motion.transition.exit` a composite value (see standards.md), `reduced:motion.transition.expand` a composite value (see standards.md).

- **Toasts, drawers and overlays** (10 rules, 4 must): React Native toasts: 300ms in, 250ms out; Drawer curve: cubic-bezier(0.32, 0.72, 0, 1); React Native: form sheets on both platforms; Feedback on press, commit on release. Locks `component.toast.duration` 4000ms, `motion.easing.drawer` [0.32, 0.72, 0, 1], `motion.gesture.drag-lock-after-scroll` 100ms.

- **Mobile and touch** (22 rules, 18 must): Press feedback scales to 0.97, briefly; Touch targets 44pt on iOS, 48dp on Android; Paint edge to edge, pad the safe areas; Ignore extra fingers during a drag; Redesign hover affordances for touch; Use Gesture Handler, never PanResponder; Use scheduleOnRN, not runOnJS; Cross to the JS thread only at thresholds; and 10 more must rules. Locks `motion.scale.press` 0.97, `motion.duration.micro` 100ms (STD-easing-duration-07 wins), `size.target.touch` 44px, `size.target.min` 44px, `motion.spring.spatial.dampingRatio` 1.0 (STD-springs-gestures-04 wins).

- **Visual details** (41 rules, 13 must): Tabular digits for changing numbers; Use the ellipsis character; Loosen tracking on uppercase labels; Make letter-spacing specific to size; Reserve underlines for links; Never stack light translucent surfaces; Restrained look with no project; Use and extend existing tokens; and 5 more must rules.

- **Process, review and taste** (14 rules, 8 must): Motion that merely runs is not done; Self-check motion before finishing; Report review findings as one table; Close every motion review with Block or Approve; Make the motion call yourself; Keep the motion note to a few lines; Say when feel can't be judged from code; Judge feel on real hardware.

- **Swift** (15 rules, 11 must): Check the Swift toolchain first; Simplest, most static thing first; Value types by default; Make invalid states unrepresentable; Main actor first, then step down; Enable Approachable Concurrency everywhere; MainActor default isolation for app modules; Libraries ship nonisolated APIs; and 3 more must rules.

</details>

Every rule, with its values, reasons and sources: `opendesigner/standards.md` (it also has the 154 rules this file leaves out). Read the themes you touch before you build.

## Motion

> Zoom: sketch (0 of 3), 1 decision in this area. To zoom in, answer Q-motion-01.

**Most movements take 200ms.** They turn into fades when a person asks for less motion.

Designers: motion system: duration, easing, springs · Code: `motion.duration.*, motion.easing.*`

**Intent.** Energy 35/100: the duration multiplier x0.94 scales the extra step (standards fix medium, long). Standard easing `cubic-bezier(0.77, 0, 0.175, 1)`, enter `cubic-bezier(0.23, 1, 0.32, 1)`, exit `cubic-bezier(0.23, 1, 0.32, 1)`. Spatial spring: damping 1.0, stiffness 246.7 (Apple duration 0.4s, bounce 0.0; web `linear()` sample over 590ms).

| Token | Value | Note |

|---|---|---|

| `motion.duration.instant` | 0ms | set by house standard STD-when-to-animate-05 |

| `motion.duration.micro` | 100ms | set by house standard STD-easing-duration-07 |

| `motion.duration.short` | 150ms | set by house standard STD-easing-duration-07 |

| `motion.duration.medium` | 200ms | set by house standard STD-easing-duration-07 |

| `motion.duration.long` | 250ms | set by house standard STD-easing-duration-07 |

| `motion.duration.extra` | 660ms | illustrative and marketing motion only, never UI (STD-easing-duration-06) |

| `motion.duration.medium-exit` | 160ms | derived: about 0.8 x medium |

| `motion.duration.long-exit` | 200ms | derived: about 0.8 x long |

| `motion.duration.reduced-fade` | 200ms | set by house standard STD-accessibility-motion-02 |

| `motion.duration.stagger` | 50ms | set by house standard STD-enter-exit-origin-13 |

- Exits are derived, not set on their own: each is about 20% shorter than the entrance in force (medium-exit 160ms from medium 200ms, long-exit 200ms from long 250ms; STD-easing-duration-11). Change an entrance and its exit follows. Linear easing only for spinners and progress.

- Reduced motion (`prefers-reduced-motion` or `data-motion="reduced"`): travel becomes opacity, feedback stays, `motion.transition.move` is 0ms.

- Springs are stored as damping and stiffness in `$extensions.opendesigner.spring` because DTCG 2025.10 has no spring type.

- Haptics: medium intensity where the platform has them; sound: hook H-sound is pending.

Decisions: D-0009 (25 values, standards), D-0013 (dials.energy).

</details>

## Modes and Themes

> Zoom: sketch (0 of 3), 0 decisions in this area. To zoom in, answer Q-theme-01, Q-theme-03.

**The system has light and dark color modes, three spacing densities and a reduced-motion mode.**

Designers: modes: light, dark, density, motion · Code: `resolver modifiers, Figma collection modes`

**Intent.** Modes live in the DTCG resolver (`opendesigner/tokens/opendesigner.resolver.json`); modifiers are orthogonal, so no two set the same token.

| Modifier | Contexts | Default |

|---|---|---|

| theme | light, dark | light |

| density | spacious, comfortable, compact | comfortable |

| motion | standard, reduced | standard |

- Web: `prefers-color-scheme` with a `[data-theme]` override; `[data-density]`; `prefers-reduced-motion` with `[data-motion]` (see `opendesigner/build/css/tokens.css`).

- High-contrast themes are not generated; set `raw.contrastTarget` to AAA for 7:1 text everywhere.

- A second brand or a client re-skin may override the color primitives and `color.bg.brand`; semantic names never change.

Decisions: none recorded yet; values are defaults from references/levers.json.

</details>

## Iconography and Imagery

> Zoom: sketch (0 of 3), 0 decisions in this area. To zoom in, answer Q-icon-01, Q-icon-02, Q-icon-06.

**Icons are 20px by default.** The logo, photos and custom icons come from a person, not from the engine.

Designers: icon system: style, sizes, color · Code: `size.icon.*, icon.stroke.*, color.icon.*`

**Intent.** Default icon size 20px; sizes 16/20/24 pair with 14/16/20px text. Stroke follows the label weight: 1.5px at 16, 2.0px at 20, 2.5px at 24. Rest style: outline.

| Asset | Hook | Status |

|---|---|---|

| Logo and marks | H-logo | pending |

| Favicon set | H-favicon | pending |

| App icon | H-appicon | pending |

| Custom icons | H-icons | pending |

| Illustration | H-illus | pending |

| Photography | H-photo | pending |

| Motifs and brand shapes | H-motif | pending |

- Placeholders are labelled as placeholders. A generated stand-in is never shown as a finished brand asset.

- Icon-only buttons need an accessible name and a hit area of `size.target.min`.

Decisions: none recorded yet; values are defaults from references/levers.json.

</details>

## Content and Voice

> Zoom: sketch (0 of 3), 0 decisions in this area. To zoom in, answer Q-voice-01, Q-voice-02, Q-voice-03.

**Words stay plain and short, and every button says what it does.**

Designers: content: voice, tone, microcopy · Code: `DESIGN.md Content and Voice section`

**Intent.** Draft: voice guidance level **short** (Brand presence 60); **title-case**; contractions **none** (Warmth 18). Voice guide hook H-voice: pending.

- Buttons say what they do in two to four words; errors say what happened and how to fix it.

- Reading level: plain language; avoid jargon in UI copy.

- Word list: not recorded yet (Q-voice-03).

Decisions: none recorded yet; values are defaults from references/levers.json.

</details>

## Accessibility

> Zoom: sketch (0 of 3), 0 decisions in this area. To zoom in, answer Q-aud-02, Q-aud-03, Q-aud-04.

**Text passes WCAG 2.2 AA contrast in every mode, and focus is always visible.**

Designers: WCAG 2.2 AA target · Code: `raw.contrastTarget`

**Your answers here** (each one either sets tokens or is a rule for this section):

- Who uses it, and how often: all day for work, often, or now and then on the go? **Often, in an everyday app** (delegated; tokens; Q-aud-01)

**Intent.** Standard: WCAG 2.2 AA. APCA is reported as advice only.

**The system guarantees:**

- text and edge contrast in every mode

- visible focus (2px ring, 2px offset, 3:1)

- minimum target sizes for each kind of input

- a reduced-motion mode

- rem-based type, so text scales to 200%

- text on colored fills chosen automatically

**Product teams own:** accessible names and labels, alt text, reading and focus order, and never using color alone. Also: clear error messages, dialogs that can be closed, no pre-checked consent boxes, and captions for media.

**Test on each platform:**

- keyboard only

- a screen reader (VoiceOver, NVDA or TalkBack)

- 200% zoom

- forced colors (Windows High Contrast)

- reduced motion

- touch on a phone, for every surface that allows touch

Decisions: none recorded yet; values are defaults from references/levers.json.

</details>

## Platforms and Devices

> Zoom: sketch (0 of 3), 1 decision in this area. To zoom in, answer Q-plat-05, Q-plat-10, Q-plat-08.

**It runs on ios, and each platform keeps its own navigation.**

Designers: target platforms · Code: `raw.platforms; size.target.min`

**Your answers here** (each one either sets tokens or is a rule for this section):

- Where will it run first: web, iOS, Android or desktop? **iOS/iPadOS** (delegated; tokens; Q-plat-01)

**Intent.** Platforms: ios. Inputs: pointer, touch. Brand presence 60: each platform keeps its own shapes and materials: no; each platform keeps its own body text size: no.

- Navigation, back, sheets and pickers stay native on every platform (DC-L10-02).

- Swift and Compose files in `opendesigner/build/` use the same names as the CSS variables (Figma code syntax matches them).

- Fonts by platform: text: Hanken Grotesk (open licence or system font: web, apps and self-hosting); display: Newsreader: licensed for web, apps, self-hosting.

Decisions: D-0006 (answers.Q-plat-01).

</details>

## Decisions

- **34 decisions so far.** Each one says who set it and why.

+ **37 decisions so far.** Each one says who set it and why.

Designers: decision history with reasons · Code: `opendesigner/decisions.md`

Your own decisions first (the newest value per path), then your changes to standards, then one row per standards batch. Full log: [opendesigner/decisions.md](opendesigner/decisions.md).

|---|---|---|---|---|

| D-0021 | `raw.fontLicence` | {"web": true, "app": true, "selfHost": true} | delegated | SIL Open Font License faces from Google Fonts: web, apps and self-hosting allowed |

+ | D-0035 | `font.size.15` | {"value": 15, "unit": "px"} | chosen | Round 3: iOS Dynamic Type step (Subheadline 15, Title 2 22) for sentence-case labels and the transcript line |

+ | D-0036 | `font.size.22` | {"value": 22, "unit": "px"} | chosen | Round 3: iOS Dynamic Type step (Subheadline 15, Title 2 22) for sentence-case labels and the transcript line |

+ | D-0037 | `font.size.20` | {"value": 20, "unit": "px"} | chosen | Round 3: Title 3, the show name set on the cover |

| D-0009 | standards | House standards v2: 339 applied | standard (locked) | OpenDesigner's house standards (sources marked non-negotiable) are applied without asking and locked. Change one only when the person asks: engine.py... |

</details>

## Open Items

**These parts are still defaults, guesses, or waiting for a person.**

- Still defaults (zoom 0, sketch): Colors, Typography, Layout, Elevation & Depth, Shapes, Components, Motion, Modes and Themes, Iconography and Imagery, Content and Voice, Accessibility, Platforms and Devices

- Assets not final: Logo, wordmark, symbol, lockups (H-logo): pending; App icon (H-appicon): pending; Favicon set (H-favicon): pending; Custom icons, pictograms, spot icons (H-icons): pending; Illustration, characters, empty-state art (H-illus): pending; Photography and art direction (H-photo): pending; Brand typeface files (H-type): pending; Fixed brand colors (H-color): pending; Motion signature and rich media (H-motion): pending; Graphic devices, patterns, textures, brand gradients, signature shape (H-motif): pending; UI sounds and sonic logo (H-sound): pending; Custom haptic patterns (H-haptic): pending; Voice and tone guide (H-voice): pending; Brand guidelines PDF (H-brandbook): pending

- Answers taken on assumption or delegated: answers.Q-aud-01 (delegated), context.audience (delegated), answers.Q-plat-01 (delegated), macros (delegated), taste.feelWords (delegated), dials.expression (delegated), dials.brandPresence (delegated), dials.density (delegated), dials.energy (delegated), dials.roundness (delegated), dials.depth (delegated), dials.colorfulness (delegated), raw.textFace (delegated), raw.fontLicence (delegated), raw.accentCount (delegated), raw.darkBase (delegated), answers.Q-scope-06 (delegated), raw.baseSize (delegated)

- Waivers: none.

- Licence risks: none found.

- - Validation: 0 errors, 2 warnings.

+ - Validation: 0 errors, 3 warnings.

## For Agents

**AI agents: read this file and the tokens before you change any screen.**

1. Before any visual work, read this file, PRODUCT.md and `opendesigner/tokens/` (start at `opendesigner/tokens/opendesigner.resolver.json`).

- 2. Use tokens, never raw values: CSS `var(--ds-...)`, Tailwind classes from `opendesigner/build/tailwind/theme.css`, `DS.*` in Swift, `DsTheme` in Compose.

+ 2. Use tokens, never raw values: CSS `var(--ds-...)`, Tailwind classes from `opendesigner/build/tailwind/theme.css`, `DS.*` in Swift. In Compose: colors from `LocalDsColors.current` (provide `DsLightColors` or `DsDarkColors`), then `DsSpace`, `DsType` and `DsMotion`.

3. Do not change a locked decision without asking the owner.

4. To change the system: `engine.py set <path> <value> --why "..."`, then `engine.py generate`, `engine.py validate`, `engine.py design-md`.

5. To extend: add a decision (never hand-edit tokens or this file). Keep semantic names the same across modes. Deprecate instead of deleting.

6. After any implementation, run `engine.py review` and re-read this file.

7. Follow the Standards section. Change a standard only when the person explicitly asks: `engine.py standard override <id> --why "<their words>"`.

**Tailwind v4 classes** (one import: `@import "tailwindcss"; @import "<path>/opendesigner/build/tailwind/theme.css";`; Tailwind's default colors, text sizes, radii and shadows are switched off, so only these exist):

| Area | Classes |

|---|---|

| Color | `bg-action-primary`, `hover:bg-action-primary-hover`, `active:bg-action-primary-pressed`, `text-on-action`, `bg-surface-base`, `bg-surface-raised`, `text-fg-primary`, `text-fg-secondary`, `text-fg-link`, `border-line-subtle`, `border-line-input`, `outline-line-focus`, `bg-danger-bold` |

| Layout | `p-inset-md`, `gap-stack-md`, `gap-inline-sm`, `h-control-md`, `size-icon-md`, `min-h-target-min` |

| Shape | `rounded-control`, `rounded-container`, `rounded-overlay`, `rounded-full` |

| Elevation | `shadow-raised`, `shadow-floating`, `shadow-overlay` |

| Type | `text-body-md`, `text-label-lg`, `text-title-md`, `text-headline-md` |

| Motion | `transition-feedback`, `ease-enter`, `ease-exit`, `ease-hover` |