anti-ui-slop

name	anti-ui-slop
description	Detect, review, prevent, and remove AI-generated UI convergence patterns ("AI slop") in frontend code. Use whenever building or styling a UI, reviewing frontend changes, refining visual design, or when the user asks to remove the AI look, make an interface feel human-designed, polish a page, audit UI quality, or explain why a design feels generic. Covers HTML, CSS, JSX/TSX, Vue, Svelte, and Tailwind; audits 46 catalogued patterns plus composition-level checks, separates source-confirmed, rendered, and judgment-based evidence, and rewrites authorized code toward a product-specific design direction without requiring external dependencies.
license	MIT

Anti UI Slop

Goal

AI-generated interfaces reveal themselves through convergence: familiar fonts, palettes, card anatomies, copy rhythms, spacing, and motion accumulate until the page could belong to any product. A single fashionable choice provides weak evidence. Repeated context-free choices provide strong evidence.

The finished interface should express its product, audience, content, and constraints. Removing a tell counts as progress only when the replacement strengthens that specificity.

Keep two classes of findings separate:

• Quality failures reduce accessibility, readability, robustness, or performance. Confirmed failures receive correction recommendations in reviews and fixes in authorized edit tasks.
• Slop signals reveal convergence. Context, repetition, composition, and product fit determine whether they become actionable findings.

Operating contract

• Match the user's authorization. Review and audit requests produce findings only. Diagnose requests explain causes only. Build, fix, refine, and polish requests authorize edits.
• Preserve the established design system, brand language, component conventions, responsive behavior, semantics, and interaction behavior.
• Read changed UI files first, then shared tokens, layout primitives, typography, and representative pages. Existing intent supplies the design direction.
• Exclude generated output, dependency code, lockfiles, snapshots, and intentional anti-pattern specimens. Storybooks, design-system galleries, and documentation examples need page-context confirmation before they count as repeated composition.
• Use existing fonts, packages, icons, and assets. Obtain user authorization before adding a dependency, remote font, generated image, or broad design-system change.
• Preserve product facts. Remove unsupported metrics and decorative claims; never invent evidence.
• Keep fixes scoped. A local tell receives a local fix. A repeated system-level tell receives a token or primitive fix.

Workflow

1. Scope the interface. Identify the route, components, styles, and shared primitives that control the requested surface. Inspect recent or changed files first in an existing project.
2. Write the direction. State one sentence before editing: [product/audience] should feel [qualities]; [content] has priority; [constraints] shape the UI.
3. Scan in three passes. Check quality failures, catalogued slop signals, then composition-level repetition across the whole page.
4. Classify the evidence. Assign layer, confidence, and context. Record earned exemptions.
5. Fix the highest-leverage cause. Correct shared tokens and repeated structures before isolated selectors. Let content hierarchy determine layout, emphasis, and rhythm.
6. Verify. Inspect the diff, run existing checks, and perform rendered checks when a browser or preview is available.
7. Report the outcome. Lead with findings for reviews. Lead with implemented changes for edit requests. Include remaining rendered-verification items.

Evidence model

Layer	Meaning	Reporting rule
Source	Literal markup, styles, tokens, or copy provide direct evidence	Cite the selector, class, component, or text and its source line
Render	Computed layout, stacking, viewport size, or composited color determines the result	Confirm in a rendered page; otherwise label Candidate - needs rendered verification
Judgment	Product context and page composition determine whether a pattern is earned	Cite at least two concrete observations and explain the product mismatch
Opt-in	Provider-associated weak signal from the reference catalog	Keep silent unless the user requests an aggressive/provider-specific sweep

Use these confidence levels:

• Confirmed: direct quality failure, rendered failure, or unmistakable source pattern with its component role verified.
• Probable: one dominant slop signature or at least two independent slop signals within the same region.
• Candidate: missing rendered evidence, unresolved variables, incomplete component context, or a weak global signal.
• Exempted: the pattern communicates real meaning, follows the established brand, or serves a functional interaction.

Severity and confidence answer different questions. Severity describes user impact; confidence describes evidential strength.

• Critical: blocks access or use, ships a broken asset, hides required content, or creates a major accessibility failure.
• High: affects a primary flow or dominates a page through a repeated slop cluster.
• Medium: affects a local component, secondary flow, or isolated slop signature.
• Low: cleanup with limited user impact. Keep unverified Candidates in their own section.

Accuracy rules:

• Quality findings can stand alone. Slop findings need a dominant signature or a local cluster.
• Weak global signals T8, T9, C1, and C5 never stand alone. Fonts and colors become evidence through their relationship with layout, type hierarchy, copy, and decoration.
• Count related symptoms once. An identical feature grid with icon tiles is one compositional cluster, with both rule IDs cited as supporting evidence.
• Follow variables, component variants, conditional classes, and shared tokens to their effective use.
• Use the rendered DOM for heading order when component composition changes source order.
• Trace localized strings and mapped components to their rendered role before applying copy or repetition rules.
• Treat demo pages that intentionally display bad UI as specimens. Preserve the demonstrated defect.
• Treat thresholds as screening values. Component role, physical size, language, density, and viewport determine the final judgment.

Replacement principles

• Structure follows content. Comparable items suit tables or aligned lists. Sequences suit steps. Narrative content suits editorial flow. Interactive choices suit controls with clear boundaries.
• Hierarchy uses a system. Establish explicit roles for display, heading, body, label, and data. A single font family can support strong hierarchy through size, weight, width, optical size, and spacing. A second family earns its place through a clear role.
• Color carries a job. Assign colors to brand, action, status, emphasis, and surfaces. Repeated decorative gradients and glows dilute those jobs.
• Spacing communicates relationship. Related items sit close. Sections receive larger separation. Repeated spacing tokens remain useful when their semantic roles differ visibly.
• Motion communicates state, continuity, or causality. Default surfaces stay still. One meaningful transition carries more value than many ornamental effects.
• Decoration carries meaning. Domain artifacts, real product UI, data, photography, diagrams, and brand motifs provide specificity. Generic icons and blobs disappear when they carry no information.
• Asymmetry follows priority. Give more space to more important content. Avoid arbitrary card-size variation created solely to appear designed.

The 46-rule catalog

The catalog preserves the reference split: 41 deterministic candidates, five Judgment rules, and four provider-specific Opt-in modifiers.

Visual details

ID	Kind	Layer	Candidate and confirmation	Correction
V1 Border accent on rounded element	Slop	Source	Colored border >= 2px and radius >= 12px on the same generic card. Outlined controls and an established graphic style can earn it	Choose one edge strategy: neutral 1px border, lower radius, or no border
V2 Glassmorphism everywhere	Slop	Judgment	Repeated translucent cards and backdrop-filter: blur decorate static content. Functional overlays can retain blur	Use opaque surfaces and express hierarchy through contrast, spacing, and elevation
V3 Side-tab accent border	Slop	Source	One side of a card has a colored border >= 3px. Confirm whether it encodes status or category	Use a status dot, icon, label, or restrained tint when meaning exists; remove empty decoration
V4 Hairline border with wide shadow	Slop	Source + opt-in GPT	A 1px border and shadow blur >= 20px share one element	Keep the crisp edge or the soft elevation
V5 Repeating-gradient stripes	Slop	Source + opt-in GPT	repeating-linear-gradient or repeating-conic-gradient decorates a surface. Progress indicators and diagrams can earn the pattern	Use a solid surface or an existing brand texture
V6 Extreme border radius	Slop	Judgment	Radius >= 24px turns a small card, section, or input into a blob. Pills, tags, and large shaped panels are role-based exceptions	Use a role-based radius scale; common cards land around 8-16px
V7 Amateurish hand-drawn SVG	Slop	Judgment	A complex inline SVG scene or mascot has rough illustrative geometry. Icons, logos, diagrams, and data visualization are exempt	Use a real asset, simplify to a purposeful diagram, or remove the illustration

Typography

ID	Kind	Layer	Candidate and confirmation	Correction
T1 Flat type hierarchy	Slop	Source	Adjacent roles differ by less than about 1.25x and also lack contrast in weight, family, spacing, or color	Define fewer roles with clearer combined contrast; use the ratio as a screening heuristic
T2 Icon tile stacked above heading	Slop	Source	Repeated feature cards use a rounded-square icon tile directly above a heading	Align icon and heading, place the icon in flow, or remove the container
T3 Italic serif display headline	Slop	Source	Serif italic >= 32px leads a generic startup hero. Editorial and fashion contexts can earn it	Use roman styling or a display treatment derived from the brand register
T4 Hero eyebrow or pill chip	Slop	Source	Tiny tracked uppercase text or a pill sits immediately above the hero heading. Breadcrumbs, status, and release metadata are functional exceptions	Fold the information into the heading, navigation context, or body copy
T5 Repeated section kickers	Slop	Source	Three or more sections repeat the same uppercase tracked mini-label	Let heading hierarchy, artifacts, and section-specific structure create navigation
T6 Oversized hero headline	Slop	Source	A heading with roughly eight or more words uses >= 48px or text-5xl styling	Shorten the claim or reduce the responsive size so supporting content remains visible
T7 Crushed letter spacing	Slop	Source	Display tracking is tighter than -0.05em; body text carries negative tracking	Restore character shapes; use modest optical tightening around 0 to -0.02em
T8 Overused font	Slop	Source, weak	Inter, Geist, Space Grotesk, or Instrument Serif appears as the default identity. Brand and system constraints are valid	Report only with other convergence signals; strengthen roles with existing fonts before proposing a new face

Color and contrast

ID	Kind	Layer	Candidate and confirmation	Correction
C1 AI color palette	Slop	Source, weak	Purple/violet gradients or cyan-on-dark dominate without brand evidence	Report only as a cluster signal; derive action, status, surface, and accent colors from existing product context
C2 Dark mode with glowing accents	Slop	Source	Dark surfaces repeat colored box shadows or neon text shadows. Focus rings and meaningful state glows are exempt	Use neutral elevation and bounded state indicators
C3 Gradient text	Slop	Source	background-clip: text and transparent fill decorate headings, metrics, or many labels	Use solid text color and express emphasis through hierarchy
C4 Gray text on colored background	Quality	Source/Render	Neutral gray sits on a chromatic surface and loses contrast	Use a light or dark tint related to the surface hue and verify contrast
C5 Cream or beige reflex	Slop	Source, weak	Warm off-white becomes the whole page's generic tasteful surface without a supporting palette	Report only as a cluster signal; establish deliberate surface, ink, accent, and status colors

Layout and space

ID	Kind	Layer	Candidate and confirmation	Correction
L1 Hero metric layout	Slop	Judgment	Hero centers a large number, tiny label, and supporting stats with generic accent treatment or unsupported claims	Lead with the product, artifact, or verified evidence; preserve only meaningful metrics
L2 Identical card grids	Slop	Judgment	Four or more siblings repeat icon, heading, and paragraph with identical sizing. Comparable interactive items can benefit from consistency	Choose a structure from the content: ranked layout, table, list, accordion, or genuinely uniform controls
L3 Monotonous spacing	Slop	Source	The same gap or padding token serves item, group, component, and section boundaries with no visible rhythm	Map spacing tokens to semantic relationships and create clear grouping contrast
L4 Nested cards	Slop	Source	Three or more nested levels repeat borders, fills, radii, or shadows. Semantic wrappers without repeated chrome are exempt	Remove redundant surfaces; group with spacing, headings, dividers, or one shared container
L5 Numbered section markers	Slop	Source	Display 01 / 02 / 03 labels decorate independent sections	Keep numbers for real sequences, timelines, ranks, or references
L6 Line length too long	Quality	Render	Running text exceeds about 80 characters per line. Code, tables, and deliberate data regions are exempt	Constrain prose to roughly 60ch-75ch
L7 Content overflowing its container	Quality	Render	Text or media spills, clips, or creates accidental horizontal scroll	Wrap, constrain, truncate with an accessible affordance, or provide deliberate scrolling
L8 Positioned child clipped by overflow container	Quality	Render	A tooltip, menu, or popover is cut by an ancestor using overflow: hidden or clip	Move the layer outside the clipping context, use a portal, or change overflow where safe

Motion

ID	Kind	Layer	Candidate and confirmation	Correction
M1 Bounce or elastic easing	Slop	Source	Dialogs, cards, and routine controls use overshoot curves or repeated spring effects. Playful or physical interactions can earn them	Use a restrained ease-out curve and shorter travel
M2 Layout-property animation	Quality	Source	Large or repeated transitions animate width, height, padding, margin, top, or left and cause reflow	Prefer transform and opacity; use a bounded disclosure pattern for necessary height changes
M3 Image hover transform	Slop	Source + opt-in Gemini	Generic cards repeatedly scale or rotate imagery on hover. Product zoom controls are functional exceptions	Keep imagery still or use a restrained overlay, caption, or border response

Copy

ID	Kind	Layer	Candidate and confirmation	Correction
P1 Em-dash overuse	Slop	Source	A body block contains three or more — characters or repeated equivalent HTML entities. Apply language-aware judgment	Rewrite with sentence boundaries, commas, colons, or parentheses
P2 Marketing buzzword	Slop	Source	Generic claims such as supercharge, streamline, empower, world-class, enterprise-grade, seamlessly, or unlock lack a concrete object or outcome	Name the exact action, object, user, and result
P3 Aphoristic cadence	Slop	Source	Multiple sections repeat patterns such as Not X. Y. or Less X. More Y.	Replace the cadence with direct product facts and natural sentence rhythm
P4 Theater framing copy	Slop	Source + opt-in GPT	Marketing dismisses a category as theater without explaining the practical failure. Established domain terms such as security theater require context	State the behavior, limitation, or consequence directly

Imagery

ID	Kind	Layer	Candidate and confirmation	Correction
I1 Broken or placeholder image	Quality	Source	Rendered image markup has missing or empty src, #, known placeholder services, or placeholder API paths. Confirm conditional branches	Use a real asset, a generated asset with authorization, a fallback, or remove the element

General quality

ID	Kind	Layer	Candidate and confirmation	Correction
Q1 Cramped padding	Quality	Render	Text or controls sit within about 8px of a bordered or colored edge. Dense tables and tiny badges use role-specific spacing	Provide enough internal space for the component's role; 12-16px suits common controls and cards
Q2 Body text touching viewport edge	Quality	Render	Running text reaches the viewport edge, especially on mobile. Full-bleed media is exempt	Add a responsive content gutter, commonly at least 16px on narrow screens
Q3 Justified text	Quality	Source	Screen body copy uses text-align: justify without effective hyphenation and language support	Left-align body copy or enable tested hyphenation for an editorial use case
Q4 Low contrast text	Quality	Source/Render	Text misses WCAG AA: 4.5:1 for normal text and 3:1 for large text. Variables, alpha, gradients, and imagery require rendered verification	Adjust foreground, background, weight, or size and verify the computed result
Q5 Skipped heading level	Quality	Source/Render	The rendered outline jumps from h1 to h3 or similar	Restore sequential semantic levels and keep visual styling in classes
Q6 Tight line height	Quality	Source	Multi-line body text uses line height below about 1.3. Display headings are role-based exceptions	Use roughly 1.45-1.7 according to typeface and measure
Q7 Tiny body text	Quality	Source	Running body text is below 12px; 12-13px body copy remains a readability risk. Captions and dense data labels need context	Use at least 14px for body copy; 16px is a strong default
Q8 Wide letter spacing on body	Quality	Source	Paragraphs use tracking above 0.05em	Restore normal tracking; reserve wide tracking for short labels

Composition checks beyond the catalog

These page-level checks catch the synthetic specimens represented in the reference gallery:

• X1 Motion saturation: many elements enter, float, pulse, wiggle, or bounce. Keep motion tied to the single state change or spatial relationship that needs explanation.
• X2 Decorative priority inversion: icon containers, badges, or ornaments occupy more visual weight than the message they introduce. Reduce or remove them.
• X3 Redundant UX writing: label, sublabel, helper, placeholder, and hint repeat the same fact. Keep the shortest complete instruction and retain helper text that adds new information.
• X4 Modal abuse: a scrolling, multi-column, multi-section workflow lives inside a modal. Move sustained work to a page or panel and reserve the modal for a bounded decision.

Fix order

Apply fixes in this sequence to prevent cosmetic churn:

1. Broken behavior, accessibility, overflow, and readability.
2. Information architecture and unsupported content.
3. Repeated page templates, card anatomy, and container depth.
4. Type hierarchy, spacing rhythm, and color roles.
5. Decorative borders, gradients, glows, radii, icons, and motion.
6. Copy cadence and redundant labels.

After each system-level change, rescan the page. One primitive edit can clear many local symptoms.

Verification

• Inspect the final diff for swapped defaults, new dependencies, invented claims, and unrelated churn.
• Run the project's existing formatter, typecheck, tests, and build in proportion to the change.
• When rendering is available, check desktop and mobile widths, horizontal scroll, line measure, contrast, popover clipping, keyboard focus, reduced motion, and content expansion.
• When rendering is unavailable, list every Render-layer item as unverified. Do not present it as a confirmed defect.
• Apply four final tests:
  • Swap test: another product would require meaningful visual and content changes.
  • Hierarchy test: the most important content wins attention without decorative assistance.
  • System test: repeated values express consistent roles and deliberate exceptions.
  • Restraint test: every strong visual effect has a defined job.

Reporting

For a review, list findings first in severity order with file and line references. For an edit, lead with the implemented result and list the important changes. Use this structure when detail helps:

DIRECTION
Internal logistics dashboard: dense, calm, utilitarian; operational data carries priority.

FINDINGS OR CHANGES
Location              | Rule    | Confidence | Evidence                    | Action
src/Form.tsx:31       | C4      | Confirmed  | gray text on blue surface   | use blue-tinted light text
src/Card.tsx:12       | V3      | Probable   | border-l-4 on status card   | replace with status dot
src/page.tsx:44       | L2/T2   | Probable   | six identical feature cards | use ranked comparison list

NEEDS RENDERED VERIFICATION
src/Popover.tsx:18    | L8      | Candidate  | clipped ancestor found      | verify open state at mobile width

EXEMPTIONS
src/Steps.tsx:9       | L5      | Exempted   | markers label a real sequence

VALIDATION
typecheck passed; mobile render checked; no horizontal overflow

Keep reports concise. Explain why a change belongs to this product. A list of removed classes provides less value than the resulting design logic.