Agent skill

Nexus UI Mockups

by ProfSynapse in ProfSynapse/nexus

Design a Nexus UI change as a standalone mockup under docs/mockups/ before any production code, then hand it off as the visual contract a plan implements against.

MITAuto-check passedFrontend & Design

Install Nexus UI Mockups

skills CLI
$ npx skills add ProfSynapse/nexus --skill nexus-ui-mockups -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install ProfSynapse/nexus nexus-ui-mockups --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/ProfSynapse/nexus.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.skills/nexus-ui-mockups .claude/skills/nexus-ui-mockups && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
nexus-ui-mockups
GitHub stars
156
Token cost
~640 tokens
SKILL.md length
298 words
Files
10 (incl. scripts, references)
Skills in repo
12
Repo updated
First seen
Licence
MIT

At a glance

Design a Nexus UI change as a standalone mockup under docs/mockups/ before any production code, then hand it off as the visual contract a plan implements against.

  • Works in 5 steps: Decide the artifact. A new or… → New mockup: follow… → Existing mockup to change, supersede, or… → …
  • Asked for a new view
  • SKILL.md covers Workflow, Map and Refine
  • Runs Python scripts from its folder; calls python3

What it does

Nexus UI Mockups is an agent skill from ProfSynapse/nexus. Design a Nexus UI change as a standalone mockup under docs/mockups/ before any production code, then hand it off as the visual contract a plan implements against. Use when asked for a new view, panel, modal, settings tab, chat surface, or layout refactor, when revising or superseding an existing mockup, or when a plan needs something visual to be blessed against.

Its SKILL.md is about 640 tokens, which your agent loads only when the skill is triggered. The skill folder holds 12 other files, including scripts and reference files (for example `protocols/build-mockup.md`, `protocols/revise-mockup.md` and `protocols/self-refine.md`).

It sits in Frontend & Design, covering UI design. The licence is MIT.

When your agent uses it

  • Asked for a new view
  • Layout refactor
  • Superseding an existing mockup
  • A plan needs something visual to be blessed against

Example prompts

  • “/nexus-ui-mockups”

Requirements

  • Python 3

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Decide the artifact. A new or substantially reshaped surface gets a mockup
  2. New mockup: follow protocols/build-mockup.md step by step.
  3. Existing mockup to change, supersede, or retire: follow
  4. Before showing anyone: run python3 .claude/skills/nexus-ui-mockups/scripts/check_mockup.py
  5. Implementation is a separate job under src/, governed by CLAUDE.md's hard

What it can do on your machine

Read from SKILL.md and the folder at commit f48a4ea. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships 2 files in scripts/ (Python), which the agent can run.

    Shell commands in SKILL.md call:

    • python3

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Nexus UI Mockups loads about 640 tokens when it runs, and up to ~4k if it reads all its reference files. Until then it costs about 96 tokens; SKILL.md has 298 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~96
When it runs · the whole SKILL.md, loaded when a task matches
~640
With references · SKILL.md plus every file in references/, read only if the agent opens them
~4k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from ProfSynapse/nexus at commit f48a4ea, republished under its MIT licence (© ProfSynapse). 298 words, ~640 tokens.

Download SKILL.mdSave it as .claude/skills/nexus-ui-mockups/SKILL.md (or your agent's skills folder). This skill also uses 9 other files; get the full folder from GitHub.
name
nexus-ui-mockups
description
Design a Nexus UI change as a standalone mockup under docs/mockups/ before any production code, then hand it off as the visual contract a plan implements against. Use when asked for a new view, panel, modal, settings tab, chat surface, or layout refactor, when revising or superseding an existing mockup, or when a plan needs something visual to be blessed against.

Nexus UI Mockups

Context: a mockup is a standalone HTML/CSS/JS page in docs/mockups/ that shows a proposed Nexus surface before the plugin code exists. It is worth building only if it looks like the real product and promises only what the plugin can actually render; otherwise it is a drawing that costs a rewrite later. This router points at the procedures — the detail loads when you take the path.

Workflow

  1. Decide the artifact. A new or substantially reshaped surface gets a mockup first. A tweak inside an existing layout does not — say so and implement.
  2. New mockup: follow protocols/build-mockup.md step by step.
  3. Existing mockup to change, supersede, or retire: follow protocols/revise-mockup.md first — you MUST NOT overwrite a mockup a plan already cites as its visual contract.
  4. Before showing anyone: run python3 .claude/skills/nexus-ui-mockups/scripts/check_mockup.py from the repo root and fix every error it prints. Nothing else in the repo checks mockups — eslint and the build both ignore docs/.
  5. Implementation is a separate job under src/, governed by CLAUDE.md's hard rules and the sibling skills (nexus-mobile-compat for phone and plugin-store constraints, nexus-agents for tools behind the UI, nexus-testing for proving it in the running plugin). Mockup-only liberties never travel there.

Map

  • references/fidelity.md — how to make it look like Obsidian and like Nexus: the token block, both themes, production class naming, icons, phone widths.
  • references/honest-mockups.md — keeping the mockup buildable: Obsidian form primitives, labelling simulation, flagging what will not ship as drawn.
  • references/handoff.md — serving it, review, blessing it as a plan's visual contract, and what happens to it after the UI ships.
  • protocols/ — build-mockup.md, revise-mockup.md, self-refine.md.
  • scripts/ — check_mockup.py (validate a mockup), theme_tokens.py (extract the token set production actually relies on). Run them, do not reimplement.

Refine

At the end of a session that used this skill, run protocols/self-refine.md.

© ProfSynapse, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 9 other files (scripts, references) in .skills/nexus-ui-mockups of ProfSynapse/nexus.

  • SKILL.md
  • protocols/build-mockup.md
  • protocols/revise-mockup.md
  • protocols/self-refine.md
  • references/fidelity.md
  • references/handoff.md
  • references/honest-mockups.md
  • refinement-log.md
  • scripts/check_mockup.py
  • scripts/theme_tokens.py

Open the folder on GitHubat commit f48a4ea

Compare with similar skills

Nexus UI Mockups next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Nexus UI Mockups compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Nexus UI Mockups this skillProfSynapse/nexus156—~640Automated safety check: PassMIT
UI StylingOhh-889/skyroc79513 repos~2.5kAutomated safety check: PassMIT
LobeHub Interactive Prototypelobehub/lobehub83k—~1.6kAutomated safety check: PassCustom licence
Make Interfaces Feel Bettersamuelclay/NewsBlur7.6k10 repos~1.5kAutomated safety check: PassMIT
UI UX Pro MaxZxBing0066/pixel-converter18113 repos~2.6kAutomated safety check: NotesBSD-2-Clause
Stitch Prompt Enhancergoogle-labs-code/stitch-skills8.4k6 repos~1.7kAutomated safety check: PassApache-2.0

Similar skills

  • UI Styling

    Ohh-889/skyroc

    Create beautiful, accessible user interfaces with shadcn/ui components (built on Radix UI + Tailwind), Tailwind CSS utility-first styling, and canvas-based visual designs.

    795 GitHub starsUsed in 13 repos~2.5k tokens
    Frontend & DesignAuto-check passed
  • Builds single-file interactive HTML prototypes rendered with the real LobeHub UI components and written as production-style React, so they can later be split into files.

    83k GitHub stars~1.6k tokensUpdated today
    Frontend & DesignAuto-check passed
  • Make Interfaces Feel Better

    samuelclay/NewsBlur

    Design engineering principles for making interfaces feel polished.

    7.6k GitHub starsUsed in 10 repos~1.5k tokens
    Frontend & DesignAuto-check passed
  • UI UX Pro Max

    ZxBing0066/pixel-converter

    UI/UX design intelligence with searchable database. An agent skill from ZxBing0066/pixel-converter.

    181 GitHub starsUsed in 13 repos~2.6k tokens
    Frontend & DesignAuto-check: notes
  • Stitch Prompt Enhancer

    google-labs-code/stitch-skills

    Official

    Rewrites a vague UI generation idea into a structured, keyword-rich prompt for Stitch, pulling in an existing DESIGN.md design system when the project has one.

    8.4k GitHub starsUsed in 6 repos~1.7k tokens
    Frontend & DesignAuto-check passed
  • Design Dna

    zanwei/design-dna

    Extract, define, and apply design DNA across three dimensions: design system (tokens), design style (qualitative feel), and visual effects (Canvas, WebGL, 3D, particles, shaders, scroll effects…

    1.9k GitHub starsUsed in 1 repo~2.1k tokens
    Frontend & DesignAuto-check passed

More from ProfSynapse/nexus

All 12 skills in this repo
  • Nexus Agents

    ProfSynapse/nexus

    How to add, change and verify a Nexus agent or tool, and the contract every tool must satisfy.

    156 GitHub stars~843 tokensUpdated today
    Auto-check passed
  • Nexus Eval Harness

    ProfSynapse/nexus

    Work on the Nexus LLM eval harness in tests/eval/ — author or fix a scenario fixture, write an eval config, change the executors, assertions or reports, or explain a run that produced nothing…

    156 GitHub stars~1k tokensUpdated today
    Auto-check passed
  • Nexus Model Eval

    ProfSynapse/nexus

    Grade how well a model drives the Nexus two-tool protocol (getTools/useTools) and decide whether a low score is the model's fault or the harness's.

    156 GitHub stars~1k tokensUpdated today
    Auto-check passed
  • Nexus Model Updates

    ProfSynapse/nexus

    Add, change or verify a Nexus LLM model definition — the registry entry, the provider default, and proof the model id actually works against the live endpoint.

    156 GitHub stars~1.1k tokensUpdated today
    Auto-check passed
  • Nexus Release

    ProfSynapse/nexus

    Cut a Nexus release — bump the version with the repo's own machinery, get the docs and generated sources right, push a tag the GitHub Actions workflow will actually pick up, and recover when it does…

    156 GitHub stars~944 tokensUpdated today
    Auto-check passed
  • Nexus Storage

    ProfSynapse/nexus

    How to change, persist, migrate and recover Nexus data without losing it.

    156 GitHub stars~749 tokensUpdated today
    Auto-check passed

Questions about Nexus UI Mockups

What does Nexus UI Mockups do?

Design a Nexus UI change as a standalone mockup under docs/mockups/ before any production code, then hand it off as the visual contract a plan implements against. Nexus UI Mockups is an agent skill from ProfSynapse/nexus. Design a Nexus UI change as a standalone mockup under docs/mockups/ before any production code, then hand it off as the visual contract a plan implements against.

When should I use Nexus UI Mockups?

Nexus UI Mockups fits situations like: asked for a new view; layout refactor; superseding an existing mockup; A plan needs something visual to be blessed against.

How do I install Nexus UI Mockups in Claude Code?

Run `npx skills add ProfSynapse/nexus --skill nexus-ui-mockups -a claude-code`. Or copy the skill folder (.skills/nexus-ui-mockups in ProfSynapse/nexus) into .claude/skills/nexus-ui-mockups in your project. Claude Code loads it when a task matches its description.

How do I install Nexus UI Mockups in Codex?

Run `npx skills add ProfSynapse/nexus --skill nexus-ui-mockups -a codex`. Or copy the skill folder (.skills/nexus-ui-mockups in ProfSynapse/nexus) into .agents/skills/nexus-ui-mockups in your project. Codex loads it when a task matches its description.

Can I use Nexus UI Mockups in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add ProfSynapse/nexus --skill nexus-ui-mockups -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/nexus-ui-mockups, .gemini/skills/nexus-ui-mockups, .github/skills/nexus-ui-mockups and .opencode/skills/nexus-ui-mockups in your project.

What does Nexus UI Mockups need to run?

Going by SKILL.md and its folder, Nexus UI Mockups needs Python for the scripts in its folder and the command-line tools its instructions call (python3). Our summary lists: Python 3.

Does Nexus UI Mockups access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Nexus UI Mockups safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.

What licence does Nexus UI Mockups use?

Nexus UI Mockups is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Nexus UI Mockups use?

About 640 tokens (SKILL.md is roughly 2.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 3.3k tokens, read only when the agent opens those files.

What are the alternatives to Nexus UI Mockups?

Skills that share tags, products or a category with Nexus UI Mockups: UI Styling (Ohh-889/skyroc, 795 stars), LobeHub Interactive Prototype (lobehub/lobehub, 83k stars), Make Interfaces Feel Better (samuelclay/NewsBlur, 7.6k stars) and UI UX Pro Max (ZxBing0066/pixel-converter, 181 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Nexus UI Mockups?

ProfSynapse (a GitHub user) maintains it in ProfSynapse/nexus, which has 156 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on October 8, 2026.

Source: ProfSynapse/nexus on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.