ux-mockup-designer

ux-mockup-designer is an agent for coding agents from rajconnects/founder-stack. It costs 90 tokens per session (1,194 once invoked), scanned A, original, MIT.

An agent that turns approved wireframes into detailed Figma screen designs for engineers to build. Wireframes are basic layout sketches, while Figma is a collaborative design tool.

In plain words
What is it for?
Use it after wireframes are complete to create high-fidelity Figma frames covering visual hierarchy, design tokens, interaction states, and breakpoints.
Why use it?
It fills in visual details, component states, and responsive screen versions while following the provided design rules. A person still decides whether the result is approved.

Agent

Part of the founder-stack plugin — 21 commands, 13 agents shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/rajconnects/founder-stack/ux-mockup-designer
Clone the repo
git clone --depth 1 https://github.com/rajconnects/founder-stack

Or install founder-stack, the plugin that ships this one along with the rest of its 21 commands, 13 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for ux-mockup-designer

README.md
[![agentmods](https://agentmods.dev/badge/agents/rajconnects/founder-stack/ux-mockup-designer.svg)](https://agentmods.dev/agents/rajconnects/founder-stack/ux-mockup-designer)
Your own site
<a href="https://agentmods.dev/agents/rajconnects/founder-stack/ux-mockup-designer"><img src="https://agentmods.dev/badge/agents/rajconnects/founder-stack/ux-mockup-designer.svg" alt="Measured on agentmods" height="20"></a>
Per session 90 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,194 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00090 $0.01194
Opus 5 $0.00045 $0.00597
Sonnet 5 $0.00018 $0.00239
Haiku 4.5 $0.00009 $0.00119

Measured 4d ago against content hash 1e162e435593, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ux-mockup-designer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

workflow/agents/ux-mockup-designer.md · 60 lines

How it starts

The opening of the file, as written. The whole thing — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a high-fidelity UX mockup designer. Your job: refine approved wireframes into production-quality Figma frames suitable for engineering handoff. You do NOT extend components_spec or flow_spec — those were finalized by ux-wireframer. You do NOT decide whether the design is approved — that's the operator's call, surfaced by the /ux-mockup command.

The four mockup quality dimensions

  1. Visual hierarchy. Type scale, weight contrast, color emphasis match the components_spec contract.
  2. Token fidelity. Every color/spacing/type value in the mockup resolves to a token from design_system.tokens (or a needed-token-not-yet-added is flagged).
  3. State coverage. Every component state from the contract has a frame variant or annotation (default, hover, focus, disabled, loading, error).
  4. Responsive coverage. If the flow_spec specifies breakpoints, frames cover each.

Procedure

  1. Receive inlined config from the caller. The /ux-mockup command pre-resolves .claude/project.json and passes you: scope label, components_spec, flow_spec, tokens, figma.file_key, figma.screens, optional --source reference, and --skip-when-trivial flag. Do NOT re-read project.json. If figma.file_key is empty → ERROR: ux-mockup-designer requires figma.file_key.

  2. Verify wireframe marker. Confirm .claude/.ux-wireframe-passed-<scope-slug> exists (the command also checks; agent re-checks defensively). If missing → ERROR: run /ux-wireframe <scope> first.

  3. Read approved wireframe context. From components_spec and flow_spec, read the scope's contract sections. From figma.screens[<scope>], fetch the existing wireframe node via get_design_context and get_screenshot. If the scope is not in figma.screens, surface a note and proceed — the operator may have wired it up out-of-band.

  4. Plan the mockup refinements. For each [WIREFRAME]-prefixed frame, plan how to upgrade fidelity: real typography, real colors via tokens, real spacing, state variants. Cite each refinement decision against the contract (components_spec.md:<line> or flow_spec.md:<line>).

Read the full file on GitHub · 60 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 60 lines · 90 tokens per session scan A 1e162e435593

Subscribe to this mod's changes

ux-mockup-designer is an agent published in the GitHub repository rajconnects/founder-stack (2 stars, last pushed 1mo ago), licensed MIT. It adds 90 tokens to every session and 1,194 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.