sddesign

sddesign is a skill for Claude Code, Codex from educlopez/ui-craft. It costs 78 tokens per session (1,478 once invoked), scanned A, original, MIT.

A guided, specification-driven process for creating a new user-interface surface from the initial brief through design decisions, implementation, review, and shipping. It writes a specification file as part of the process.

In plain words
What is it for?
Use it when starting a new page or interface from scratch. It can guide the work through the brief, design tokens, specification, build, convergence, and ship stages.
Why use it?
It puts the major design and build steps in one sequence, so a new interface has a documented plan before it is finished.

Skill for Claude CodeCodex

Part of the ui-craft plugin — 30 skills, 25 commands, 2 agents, 1 MCP server 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 skills/educlopez/ui-craft/sddesign
Any agent
npx skills add educlopez/ui-craft --skill sddesign
Clone the repo
git clone --depth 1 https://github.com/educlopez/ui-craft

Made for: Claude Code, Codex.

Or install ui-craft, the plugin that ships this one along with the rest of its 30 skills, 25 commands, 2 agents, 1 MCP server.

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 sddesign

README.md
[![agentmods](https://agentmods.dev/badge/skills/educlopez/ui-craft/sddesign.svg)](https://agentmods.dev/skills/educlopez/ui-craft/sddesign)
Your own site
<a href="https://agentmods.dev/skills/educlopez/ui-craft/sddesign"><img src="https://agentmods.dev/badge/skills/educlopez/ui-craft/sddesign.svg" alt="Measured on agentmods" height="20"></a>
Per session 78 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,478 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 $0.00078 $0.01478
Opus 5 $0.00039 $0.00739
Sonnet 5 $0.00016 $0.00296
Haiku 4.5 $0.00008 $0.00148

Measured 5d ago against content hash 20fd12ad5e2f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

sddesign 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 5d 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.

.agents/skills/sddesign/SKILL.md · 112 lines

How it starts

The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Context: this sub-skill is one lens of the broader ui-craft skill. If the ui-craft skill is also installed, read its SKILL.md first for Discovery + Anti-Slop + Craft Test, then apply the specific lens below.

Run the spec-driven design pipeline for $ARGUMENTS. Load the ui-craft skill.


ORCHESTRATE-ONLY RULE

This command sequences existing phase commands. It MUST NOT re-implement or duplicate any logic from them. Every composition rule, wireframe algorithm, craft rule, and convergence engine lives in the phase commands. This command contributes only:

  1. Gate detection (does the artifact exist?)
  2. Offer prompts (run phase X or skip?)
  3. Progress reporting (the checklist)
  4. Degraded-mode honesty (what was skipped and what that costs)

When in doubt: call the phase command, don't inline its steps.


Progress Checklist

Print this at the start and update it after each gate resolves:

[ ] brief   [ ] tokens   [ ] shape (spec)   [ ] craft (build)   [ ] converge   [ ] ship

Use [✓] for completed/skipped-with-artifact, [>] for the current gate, [–] for skipped-without-artifact (degraded).


Pipeline Gates

Gate 1 — Brief

Check: does .ui-craft/brief.md exist?

If yes: mark [✓] brief. Note that brief §6 learned constraints and the a11y/correctness floor are in effect for all downstream gates — they take precedence over any spec.md composition choice.

If no: offer to run /brief now.

  • User confirms → run /brief. When it completes, mark [✓] brief.
  • User declines → mark [–] brief. Note downstream impact: "no brief → craft will use skill defaults; composition will not be anchored to project principles."

Gate 2 — Tokens

Check: does a token spine exist? (Look for CSS variables --color-*, --font-*, --accent-*, a Tailwind theme.extend with tokens, or a token file.)

Read the full file on GitHub · 112 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. 5d ago First seen · 112 lines · 78 tokens per session scan A 20fd12ad5e2f

Subscribe to this mod's changes

sddesign is a skill published in the GitHub repository educlopez/ui-craft (310 stars, last pushed yesterday), licensed MIT. It adds 78 tokens to every session and 1,478 once invoked, about $0.0004 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 2026-08-30.

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