reference-design-contract
nexu-io/open-design
Turn design references into a reusable DESIGN.md contract before prototyping or generation.
What is reference-design-contract?
This skill converts vague taste signals, screenshots, URLs, and "make it feel like this" briefs into a grounded design contract. Use it before prototypes, decks, redesigns, or image work when you need explicit visual direction and implementation handoff rather than a one-off prompt.
- Separates reference qualities into Keep/Change/Do-Not-Copy categories to avoid literal copying
- Produces DESIGN.md following a standard nine-section design-system structure (theme, color, typography, spacing, layout, components, motion, voice, anti-patterns)
- Creates design-contract.md documenting evidence, rationale, risks, and quality gates
- Generates implementation-handoff.md with concrete build constraints and acceptance criteria
- Optionally produces example.html as a small contract preview
How to install reference-design-contract
npx skills add https://github.com/nexu-io/open-design --skill reference-design-contractHow to use reference-design-contract
- 1.Provide the brief: goal, audience, references (screenshots/URLs/notes), and any constraints
- 2.The skill identifies target artifact type and locks the job, asking clarifying questions only if critical
- 3.Evidence is read from provided references; if missing, the contract is based on the brief alone
- 4.The skill separates each reference into Keep (qualities to preserve), Change (what to adapt), and Do-Not-Copy (literal assets to avoid)
- 5.One coherent visual stance is chosen and frozen
- 6.Three files are generated: DESIGN.md (nine-section visual direction), design-contract.md (decision record with evidence table and risks), and implementation-handoff.md (operational build instructions)
- 7.Validate against the P0 quality gates before final handoff
Use cases
- Planning a redesign or new product direction from competitor or inspiration references
- Handing off visual direction to a prototype or code-generation skill without ambiguity
- Documenting design decisions and constraints before image-remix or deck work
- Establishing a reusable design system from scattered taste signals and screenshots
- Creating a decision record that explains what to keep, change, and avoid from references
- Product designers planning visual direction
- Design leads creating handoffs for developers or AI agents
- Teams establishing design systems from reference materials
- Developers receiving design contracts before implementation
reference-design-contract FAQ
This skill makes design decisions explicit and traceable. It produces a reusable contract (DESIGN.md) with evidence, rationale, and quality gates—not just a longer description. The next skill (prototype, code, image-remix) can execute without guessing.
No. If references are missing, the skill bases the contract on your brief alone and labels inferences clearly. You can always iterate. The goal is a grounded direction, not a perfect moodboard.
Yes. The contract is reusable. Once DESIGN.md and design-contract.md are locked, you can hand them off to different skills (prototype, deck, image-remix, code generation) in sequence.
Name them briefly, pick the recommended one, and continue. The skill produces one coherent stance, not five unrelated moodboards.
The skill explicitly separates Keep (qualities like density, typography rhythm, color temperature) from Do-Not-Copy (logos, exact layouts, proprietary UI, literal screenshots). The implementation-handoff reinforces asset rules.
Full instructions (SKILL.md)
Source of truth, from nexu-io/open-design.
name: reference-design-contract zh_name: "参考转设计合约" en_name: "Reference Design Contract" description: | Turn vague taste, screenshots, URLs, product notes, or "make it feel like this" references into a grounded DESIGN.md plus an implementation handoff. Use it before prototypes, decks, redesigns, or image remix work when the user needs a reusable visual direction rather than a one-off prompt. triggers:
- "design contract"
- "reference design brief"
- "style contract"
- "visual direction handoff"
- "turn references into DESIGN.md"
- "make it feel like this"
- "做同款但不照抄"
- "把参考图转成设计规范"
od:
mode: design-system
platform: desktop
scenario: planning
category: design-systems
preview:
type: html
entry: example.html
design_system:
requires: false
generates: true
sections: [visual-theme, color, typography, spacing, layout, components, motion, voice, anti-patterns]
craft:
requires:
- typography
- color
- anti-ai-slop inputs:
- name: brief
type: string
required: true
description: "Goal, audience, references, or the style problem to resolve"
outputs:
primary: DESIGN.md
secondary:
- design-contract.md
- implementation-handoff.md
- example.html capabilities_required:
- file_write example_prompt: "Create a reference design contract for a developer-notes app. The direction should feel editorial, calm, tactile, and serious, but not copy any specific product. Produce DESIGN.md and an implementation handoff." example_prompt_i18n: zh-CN: "为一个开发者笔记应用创建「参考转设计合约」。方向要有编辑感、安静、触感强、认真,但不要照抄任何具体产品。输出 DESIGN.md 和实现交接说明。"
Reference Design Contract
Use this skill when the user has taste signals, references, or a rough "like this" request and needs a reusable design contract before generation. The goal is not to write a longer prompt. The goal is to make design decisions explicit enough that a later prototype, deck, redesign, or image-remix run can execute without guessing.
What this skill produces
Create three files:
DESIGN.md— the reusable visual direction, following OpenDesign's standard nine-section design-system shape.design-contract.md— the decision record: evidence used, keep/change boundaries, rationale, risks, and quality gate.implementation-handoff.md— concise build instructions for the next artifact-producing skill or coding agent.
If a preview is useful, also create example.html as a small hand-built
contract preview. Do not make it the main deliverable.
Workflow
- Lock the job. Identify target artifact type, audience, brand/product context, references, and constraints. Ask at most two questions only when a missing answer would change the direction. Otherwise choose a sensible default and label it as inferred.
- Read evidence. Use provided screenshots, URLs, existing
DESIGN.md, brand docs, image artifacts, or user notes. If evidence is missing, say so and base the contract on the brief only; do not invent brand facts. - Separate reference semantics. For every reference, split it into:
Keep: qualities to preserve, such as density, composition, material, typography rhythm, color temperature, or motion attitude.Change: subject matter, copy, brand marks, exact layout, protected assets, and anything the user wants adapted.Do not copy: literal screenshots, logos, claims, pricing, proprietary UI, or exact prompt wording from examples.
- Freeze the direction. Choose one coherent visual stance. Do not provide five unrelated moodboards. If there are genuinely competing directions, name them briefly, pick the recommended one, and continue.
- Write
DESIGN.md. Use these nine headings exactly:## 1. Visual Theme & Atmosphere## 2. Color## 3. Typography## 4. Spacing & Grid## 5. Layout & Composition## 6. Components## 7. Motion & Interaction## 8. Voice & Brand## 9. Anti-patterns
- Write
design-contract.md. Include:- goal and target artifact
- evidence table with confidence (
observed,provided,inferred) - keep/change/do-not-copy table
- final design stance in one paragraph
- risks and explicit unknowns
- quality gate checklist
- Write
implementation-handoff.md. Keep it short and operational:- files to read
- token/palette/type/layout constraints
- asset rules
- responsive requirements
- "first artifact should prove..." acceptance notes
- Validate. Read
references/checklist.mdand satisfy every P0 gate before final handoff.
Output rules
- Make every claim traceable to user input, observed reference evidence, or an explicitly labeled inference.
- Prefer concrete constraints over adjectives: "one warm accent, no purple or blue glow" beats "premium".
- Treat "do the same style" as "borrow controllable qualities", not "clone the original subject or prompt".
- If the user asks for immediate UI generation too, finish these contract files first, then hand off to the appropriate artifact skill in the next step.
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