design-spec-writing

design-spec-writing is a skill for Claude Code from Dragoon0x/everything-design-taste. It costs 19 tokens per session (569 once invoked), scanned A, original, MIT.

A guide to writing short, detailed instructions that explain how a product feature should work and look. It covers user flows, screen states, interactions, content rules, and edge cases.

In plain words
What is it for?
Use it to document features, loading and error states, user actions, validation rules, and unusual situations.
Why use it?
It reduces vague or outdated instructions that cause engineers to guess during implementation.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the edt plugin — 117 skills, 80 agents shipped together

Good fit Use it to document features, loading and error states, user actions, validation rules, and unusual situations.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dragoon0x/everything-design-taste/design-spec-writing
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.

Any agent
npx skills add Dragoon0x/everything-design-taste --skill design-spec-writing
Clone the repo
git clone --depth 1 https://github.com/Dragoon0x/everything-design-taste

Made for: Claude Code.

Or install edt, the plugin that ships this one along with the rest of its 117 skills, 80 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 design-spec-writing

README.md
[![agentmods](https://agentmods.dev/badge/skills/dragoon0x/everything-design-taste/design-spec-writing/github.svg)](https://agentmods.dev/skills/dragoon0x/everything-design-taste/design-spec-writing)
Your own site
<a href="https://agentmods.dev/skills/dragoon0x/everything-design-taste/design-spec-writing"><img src="https://agentmods.dev/badge/skills/dragoon0x/everything-design-taste/design-spec-writing/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for design-spec-writing

Your own site · 80×15
<a href="https://agentmods.dev/skills/dragoon0x/everything-design-taste/design-spec-writing"><img src="https://agentmods.dev/badge/skills/dragoon0x/everything-design-taste/design-spec-writing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 569 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00019 $0.00569
Opus 5 $0.00010 $0.00284
Sonnet 5 $0.00004 $0.00114
Haiku 4.5 $0.00002 $0.00057

Measured 7d ago against content hash ad988db7711e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

design-spec-writing 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 7d 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.

skills/design-spec-writing/SKILL.md · 78 lines

How it starts

The opening of the file, as written. The whole thing — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Design Spec Writing

Why Most Specs Fail

Engineers don't read specs because specs are usually:

  1. Too long (nobody reads 40 pages)
  2. Too vague ("the button should feel responsive")
  3. Out of date (the design changed but the spec didn't)
  4. Redundant with the Figma file (so why bother?)

What a Good Spec Contains

1. Overview (1 paragraph)

What this feature is, who it's for, and why it exists. Link to the product brief.

2. User Flow (visual)

Flowchart or numbered steps showing the complete path. Include error paths and edge cases.

3. Screen-by-Screen Spec

For each screen:

## [Screen Name]

**Entry point:** How does the user get here?
**Primary action:** What's the main thing they do?
**Exit points:** Where can they go from here?

### States
- Default: [description + link to Figma frame]
- Loading: [description]
- Empty: [description]
- Error: [description + error messages]
- Success: [description]

### Interactions
- [Element]: [Behavior on click/hover/focus]
- [Element]: [Behavior on click/hover/focus]

### Content
- [Field]: [Character limits, formatting rules]
- [Field]: [Validation rules, error messages]

### Edge Cases
- What happens when [unlikely but possible scenario]?
- What if the user [does something unexpected]?

4. Component Inventory

List of design system components used and any new components introduced.

5. Responsive Behavior

How the layout adapts. Not "it stacks on mobile." Specific decisions: what changes, what hides, what reorders.

6. Animation Spec

[Element]: [Trigger] → [Property] from [start] to [end]
Duration: [Xms], Easing: [curve], Delay: [Xms]

7. Acceptance Criteria

Testable statements:

  • User can [action] and sees [result]
  • When [condition], the system [behavior]
  • Error state shows when [trigger]

Writing Style

  • Use numbered steps, not paragraphs
  • Link to specific Figma frames, not "see designs"
  • Include actual copy, not "TBD"
  • State exact values (16px, not "some padding")
  • Update the spec when the design changes

Read the full file on GitHub · 78 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. 7d ago First seen · 78 lines · 19 tokens per session scan A ad988db7711e

Subscribe to this mod's changes

design-spec-writing is a skill published in the GitHub repository Dragoon0x/everything-design-taste (11 stars, last pushed 5mo ago), licensed MIT. It adds 19 tokens to every session and 569 once invoked, about $0.0001 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 2026-09-03.

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