Visual Consistency

A detector and fixer for the visual and layout consistency defects that show up in rendered UI: the systematic raggedness an AI generator emits and a senior notices at a glance. It finds where repeated elements that should line up do not, where spacing is arbitrary instead of systematic, and where variable-length content breaks a clean layout, explains the cost of each, and proposes a concrete CSS fix with a source. The full catalog with detection signals, fixes, exceptions, severity, and sources is in catalog.md; copy-pasteable recipes for the flagship cases are in recipes.md. Read the catalog before a scan.

It defers two neighboring concerns to sibling skills so it does not duplicate them: color literals and contrast to theme-colors, and component, hook, and TypeScript code smells to react-stinky. The accessibility line splits the same way: this skill owns the visual and sizing side (target size, focus-ring consistency, reflow, text spacing the user can override), react-stinky owns the semantic-markup side (roles, labels, keyboard handlers). Whether a screen should exist at all is ask-ux, upstream of everything here. If a sibling is not installed, note the finding in one line and move on.

The four it was built for

These are the defects that prompted the skill. Each has a clean, modern fix; the rest of the catalog generalizes them.

1. Uneven card heights in a grid. Cards in a row render at different heights because text length differs, so the grid looks busy. Grid and flex already stretch a row to its tallest card; the work is making the card a flex or grid column so its own footer pins to the bottom. See recipes.md.
2. Sibling cards whose sections do not line up. Same template, but each card's title, body, and footer start at a different Y, so nothing scans across the row. The modern answer is CSS subgrid: declare the row tracks once on the grid and let each card inherit them, so the tallest title sets the title row for every card. See recipes.md.
3. Trailing icons at ragged X positions. A list of links with an open-in-new-tab icon places the icon at a different X on every row because link text varies. Pin it with a two-column grid (1fr auto), or margin-inline-start: auto in a flex row, and add min-width: 0 so long text truncates instead of shoving the icon. See recipes.md.
4. Arbitrary, inconsistent spacing. Spacing falls back to off-scale magic numbers (13px, 7px, 22px), or mixes margin and gap, or pads similar containers differently. Snap every value to a spacing scale (4 and 8 point) referenced as a token, and prefer one gap on the parent over per-element margins. See recipes.md.

What it checks

Ten families, detailed with per-smell detection signals and sources in catalog.md:

• Card grids and repeated items. Equal height, internal-section alignment (subgrid), ragged trailing icons and values.
• Spacing and rhythm. Off-scale values, raw literals where a token exists, outer padding smaller than inner, content flush to the viewport edge, spacing not reflecting grouping.
• Alignment and grid. Elements not sharing a common edge, off baseline grid, icon-to-text misalignment, centered long text, justified prose without hyphenation, mixed alignment, label and value rows that do not form a column, content-container width that jumps between sections.
• Repeated-element consistency. Same-role buttons or inputs at different sizes, inconsistent border-radius, ad-hoc shadows instead of an elevation scale, mismatched icon sizes, inconsistent interaction states and untokenized motion.
• Typography. Off-scale font sizes, too many sizes, line-height not paired to size, line length past the readable measure, awkward heading wrapping (balance and pretty), uppercase running text, inconsistent units for one role.
• Tables and lists. Numbers not right-aligned, no tabular-nums, header not matching its column, uneven row heights.
• Borders and dividers. Overuse of borders for separation, redundant adjacent divides, inconsistent divider weight.
• Responsive, overflow, long content. Fixed widths that overflow small screens, long strings with no overflow-wrap, text clipped by a fixed height, positioned layers clipped by an ancestor's overflow, ellipsis with no full-text affordance, text spacing the user cannot override.
• Layout stability. Media with no dimensions or aspect-ratio, skeletons sized differently from the loaded content.
• Touch targets and focus. Hit area below the minimum, stripped focus outline with no replacement, inconsistent focus rings.

Color and contrast are detected only as a boundary marker and handed to theme-colors.

Scope modes

Match the scope to the request, then run the workflow over it.

Workflow per target

1. Prefer the rendered UI. If the app runs, look at the real screen, including its long-content and empty states, before reading code. If it does not, work from the markup and styles.
2. Walk each surface against the catalog families. For a grid, list, table, or card template, start with the flagship four.
3. Run the matching "Don't flag" guard before reporting. If it applies, suppress the finding.
4. Rate each finding on both axes (below).
5. Emit a finding with location, the cost, and a before-to-after fix. For Safe findings you may apply the fix, then re-render and confirm it holds at a narrow and a wide width; for Judgment findings, surface it.
6. End with a summary count. If nothing survives the guard, say it looks clean.

Severity and autonomy

Rate every finding on two axes. Severity says how much it hurts; autonomy says who decides the fix.

Severity.

• Glaring. Jumps out on sight, or an objective failure (overflow, clipped text, a touch target below the minimum, a stripped focus ring). Fix now.
• Untidy. A real consistency drag a senior would notice, not a break. Should fix.
• Nitpick. Minor or situational. Optional, fix when batching.

Autonomy.

• Safe. Objective and reversible, and it snaps to a scale or value the design has already established (an off-grid margin to the nearest token, a same-role button to the dominant size, a numeric column to right-aligned). Fix it freely.
• Judgment. The fix introduces a value or direction the design has not set (which typeface to drop, where the group boundaries are, a new breakpoint strategy, anything color). Propose, do not silently ship.

The autonomy axis is the bridge to autopilot. Safe maps to in-bounds work, Judgment maps to surface-first. An autonomous run fixes Safe findings and records Judgment ones as proposals. Scope each commit to one family or one component, never a repo-wide spacing rewrite in a single diff. Let Nitpicks ride along while you are already in a file rather than earning their own commit. Verify visually: screenshot the screen before and after at a narrow and a wide width, since a layout fix can regress overflow or wrapping that a green build will not catch.

Don't flag

The guard that keeps this from becoming a noisy linter. Honor it.

• Deliberate masonry or staggered layouts. Uneven heights are the design there, not a defect.
• Off-scale values that are correct: 1px hairlines and borders, optical nudges to make an asymmetric glyph look centered, a true pill radius (9999px) or circle (50%), an intrinsic asset size.
• Clamping or truncation on teasers and descriptions is fine; do not clamp load-bearing content (prices, names, errors) without an affordance.
• Documented size and emphasis variants (small, medium, large, icon-only) are not inconsistency.
• One real problem, one finding. Prefer the smallest fix. Respect a consistent local convention over the catalog default.
• Defer color and contrast to theme-colors, and component or TypeScript code smells to react-stinky, rather than duplicating them.

Output format

Visual Consistency report, <scope>

src/components/CardGrid.tsx
  [Glaring / Safe] card-internals-misaligned (card grids), the .card row
    Smell: each card lays out independently, so titles and CTAs land at different Y across the row.
    Cost: the row does not scan; the eye re-finds each section per card. Looks busy.
    Fix: declare the row tracks on the grid and opt each card into subgrid.
      .grid  { grid-template-rows: auto auto 1fr auto; }
      .card  { display: grid; grid-template-rows: subgrid; grid-row: span 4; }
    Source: MDN Subgrid (https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_grid_layout/Subgrid)

  [Untidy / Safe] off-grid-spacing (spacing and rhythm), line 22
    Smell: padding: 13px 7px is off the spacing scale.
    Cost: nothing aligns to the grid; spacing reads as arbitrary.
    Fix: snap to the scale token, padding: var(--space-3) var(--space-2) (12px 8px).
    Source: Material 3 spacing (https://m3.material.io/foundations/layout/understanding-layout/spacing)

Summary: 1 glaring, 1 untidy across 1 file. 2 Safe, 0 Judgment.

When the scope is clean, say so plainly: "Looks clean. No visual consistency defects found in <scope>."

Source

The flagship fixes and the catalog are grounded in MDN, web.dev, and caniuse for CSS behavior and browser support (subgrid, line-clamp, container queries, aspect-ratio, tabular-nums), the major design systems for scales and tokens (Material 3, Shopify Polaris, IBM Carbon, Atlassian), Refactoring UI and Anthony Hobday's visual rules for the consistency principles, and WCAG 2.2 for the objective accessibility floors (target size, reflow, focus). Per-smell sources are in catalog.md.