Create new design genomes for the motif UI generation system. Use this skill whenever the user wants to add a new visual style, design language, aesthetic direction, or "genome" to their library. Also use when they mention creating themes, design systems, style definitions, or want to expand the available design options in motif. Covers the full workflow — from concept to a production-ready genome markdown file that slots into the modular genome architecture.
インストール
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Create new design genomes for the motif UI generation system. Use this skill whenever the user wants to add a new visual style, design language, aesthetic direction, or "genome" to their library. Also use when they mention creating themes, design systems, style definitions, or want to expand the available design options in motif. Covers the full workflow — from concept to a production-ready genome markdown file that slots into the modular genome architecture.
Genome Authoring
This skill guides the creation of new design genomes for motif's modular genome system. A genome is a total design philosophy — not just colors, but a complete specification covering surface treatment, typography, interaction language, motion, atmosphere, editorial voice, and anti-patterns. Each genome file lives in api/src/genomes/ and is automatically discovered by the system at runtime.
What makes a genome work
The genome system's power comes from specificity and constraint. Every existing genome succeeds because it commits fully to an identity and then specifies exactly how that identity manifests across every layer of the UI. A genome that says "use nice colors" is useless. A genome that says "border-radius: 0px. no exceptions. all panel dividers and rules are red." — that's actionable.
The reason this matters: these genomes are consumed by an LLM generating HTML. The LLM needs unambiguous, concrete instructions to produce consistent output. Vague guidance leads to generic results. Precise CSS values, specific font choices, exact color hex codes, and explicit anti-patterns produce distinctive, recognizable output every time.
The nine layers
Every genome must define all nine layers. Missing layers lead to inconsistent output where the LLM falls back to generic defaults. Read references/genome-layers.md for the full specification of each layer with examples drawn from existing genomes.
Editorial voice — how the genome "writes": button labels, headings, metadata, placeholders, empty states, error/success messages
Cursor & selection — cursor style per context, ::selection colors
Anti-patterns — what this genome explicitly NEVER does (typically 6-10 items)
Authoring workflow
1. Define the identity
Start with a one-sentence identity statement that captures the genome's essence. This should evoke a specific real-world reference point — not abstract design jargon.
Good identity statements reference tangible things:
"clinical, high-risk technical documentation. swiss international style meets classified government filing."
CSS variable names — define a palette with --varname: #hex syntax
Component-by-component specifics — don't say "buttons look like the theme", specify border, background, radius, padding, typography, and states
4. Write the anti-patterns
After defining what the genome does, explicitly list what it never does. Frame these as absolute rules with the word "never". These prevent the LLM from drifting toward generic patterns.
Each anti-pattern should contradict a common default. For example, if your genome uses only monospace fonts, the anti-pattern is "never uses sans-serif or display typefaces."
Important note on color anti-patterns: Do NOT write anti-patterns that rigidly forbid all colors outside the defined palette (e.g. "never uses any color outside the palette"). The genome palette is the foundation, but the generating agent has creative license to introduce additional colors that feel native to the genome's world. Instead, frame color anti-patterns around aesthetic direction — what kinds of colors would clash with the genome's identity (e.g. "never introduces warm/saturated colors that break the cold technical aesthetic").
5. Define the editorial voice
This layer is often overlooked but dramatically affects output quality. The genome doesn't just style elements — it writes the text inside them. Specify:
Button label examples (5-8 representative labels)
Heading style (case, tone, length, punctuation)
Metadata format (how dates, versions, statuses, and IDs appear)
Placeholder text examples
Empty state messages
Error and success message tone and format
6. Select keywords for auto-matching
The frontmatter keywords array drives automatic genome selection during prompt expansion. Choose 8-12 keywords that a user might naturally use when describing a UI that fits this genome. Include both obvious matches ("terminal", "hacker") and less obvious associations ("covert", "mainframe", "phosphor").
The id field should be the next sequential number (check existing genomes in api/src/genomes/). The name follows the pattern descriptive_name.suffix where the suffix evokes the genome's era or medium.
Deduplication: avoiding similar genomes
Before writing a new genome, always check for overlap with existing genomes. Read all .md files in api/src/genomes/ (excluding _base.md) to understand the current library.
A new genome must be meaningfully distinct from every existing genome across at least 4 of these dimensions:
Color temperature — warm vs cool vs neutral
Border philosophy — sharp (0px) vs rounded vs pill-shaped
Typography family — monospace vs sans-serif vs pixel vs serif
Motion strategy — no transitions vs fast snaps vs smooth eases
Information density — sparse/spacious vs dense/packed
Era/reference point — the real-world aesthetic being channeled
Editorial voice — terse/technical vs warm/human vs loud/confrontational
Similarity check process
For each existing genome, evaluate overlap:
Low overlap (OK to proceed): Different in 5+ dimensions. The genomes will produce visually distinct output.
Moderate overlap (needs refinement): Different in 3-4 dimensions. The new genome needs sharper constraints or a more distinctive identity to justify its existence.
High overlap (should not create): Different in 0-2 dimensions. This is essentially a variant of an existing genome. Instead of creating a new file, consider updating the existing genome with new options or creating a sub-variant.
When to update instead of create
If a proposed genome is too similar to an existing one, the right approach is usually to refine the existing genome rather than add a near-duplicate. This could mean:
Adjusting the existing genome's color palette to accommodate the new direction
Adding alternate component patterns within the existing genome
Tightening the existing genome's identity statement to better differentiate it
Expanding the existing genome's keyword set
Document your similarity assessment at the top of your response before writing any genome content:
Similarity check:
- vs lab_manual.80s: LOW (different era, different color temp, different border philosophy)
- vs underground_terminal.crt: MODERATE (both dark, both monospace — but different era/voice/motion)
- vs panavision.70s: LOW (different era, different density, different typography)
Decision: Proceed with new genome — sufficiently distinct.
After creating the file
Save the file to api/src/genomes/[name].md
The genome is automatically discovered — call POST /api/genomes/reload or restart the dev server
Test by generating a UI with the genome explicitly selected, or by using keywords that should trigger auto-selection
Quality checklist
Before considering a genome complete, verify:
All nine layers are fully specified
Every color has a CSS variable name and hex value
Typography specifies family, weight, size ranges, letter-spacing, line-height, and text-transform
At least 10 component types are specified (buttons, inputs, cards, nav, headers, footers, lists, tables, dividers, modals)
All six interaction states have explicit CSS properties
Anti-patterns list has 6+ items that genuinely contrast with the genome's choices
Editorial voice has examples for all categories (buttons, headings, metadata, placeholders, empty states, errors, successes)
Keywords array has 8-12 terms for auto-matching
The identity statement references something tangible, not abstract
