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Agent skill

Handoff Spec

by Owl-Listener in Owl-Listener/designer-skills

Write the implementation handoff — measurements, behaviours, assets, states, and edge cases.

MITAuto-check passedFrontend & Design

Install Handoff Spec

skills CLI
$ npx skills add Owl-Listener/designer-skills --skill handoff-spec -a claude-code

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

GitHub CLI
$ gh skill install Owl-Listener/designer-skills handoff-spec --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/Owl-Listener/designer-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/design-ops/skills/handoff-spec .claude/skills/handoff-spec && 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
handoff-spec
GitHub stars
2.9k
Used in
1 other repo
Token cost
~497 tokens
SKILL.md length
200 words
Files
1
Skills in repo
107
Repo updated
First seen
Licence
MIT

At a glance

Write the implementation handoff — measurements, behaviours, assets, states, and edge cases.

  • Engineering picks up the work
  • SKILL.md covers What You Do, Handoff Contents and Best Practices
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Tasks that involve Design systems

What it does

Handoff Spec is an agent skill from Owl-Listener/designer-skills. Write the implementation handoff — measurements, behaviours, assets, states, and edge cases. Use when engineering picks up the work. For verifying the result afterwards use design-qa-checklist; for reusable library components use component-spec (design-systems).

Its SKILL.md is about 500 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Frontend & Design, covering Design systems and QA and bug reports. The repository describes itself as: Designer Skills Collection: agentic skills, commands, and plugins for design — from research to systems, UI, interaction, and delivery. The licence is MIT.

When your agent uses it

  • Engineering picks up the work
  • Tasks that involve Design systems
  • Tasks that involve QA and bug reports

Example prompts

  • “/handoff-spec”

What it can do on your machine

Read from SKILL.md and the folder at commit 9a6930c. 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

    No scripts in the folder and no shell commands in SKILL.md.

    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

Handoff Spec loads about 497 tokens when it runs. Until then it costs about 70 tokens; SKILL.md has 200 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~70
When it runs · the whole SKILL.md, loaded when a task matches
~497

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); files beside SKILL.md are not scanned.

SKILL.md

The full file from Owl-Listener/designer-skills at commit 9a6930c, republished under its MIT licence (© Owl-Listener). 200 words, ~497 tokens.

Download SKILL.mdSave it as .claude/skills/handoff-spec/SKILL.md (or your agent's skills folder).
name
handoff-spec
description
Write the implementation handoff — measurements, behaviours, assets, states, and edge cases. Use when engineering picks up the work. For verifying the result afterwards use `design-qa-checklist`; for reusable library components use `component-spec` (design-systems).

Handoff Spec

You are an expert in creating clear, complete developer handoff specifications.

What You Do

You create handoff documents that give developers everything needed to implement a design accurately.

Handoff Contents

Visual Specifications
  • Spacing and sizing (exact pixel values or token references)
  • Color values (token names, not hex codes)
  • Typography (style name, size, weight, line-height)
  • Border radius, shadows, opacity values
  • Responsive breakpoint behavior
Interaction Specifications
  • State definitions (default, hover, focus, active, disabled)
  • Transitions and animations (duration, easing, properties)
  • Gesture behaviors (swipe, drag, pinch)
  • Keyboard interactions (tab order, shortcuts)
Content Specifications
  • Character limits and truncation behavior
  • Dynamic content rules (what changes, min/max)
  • Localization considerations (text expansion, RTL)
  • Empty, loading, and error state content
Asset Delivery
  • Icons (SVG, named per convention)
  • Images (resolution, format, responsive variants)
  • Fonts (files or service links)
  • Any custom illustrations or graphics
Edge Cases
  • Minimum and maximum content scenarios
  • Responsive behavior at each breakpoint
  • Browser/device-specific considerations
  • Accessibility requirements (ARIA, keyboard, screen reader)
Implementation Notes
  • Component reuse suggestions
  • Data structure assumptions
  • API dependencies
  • Performance considerations

Best Practices

  • Use design tokens, not raw values
  • Annotate behavior, not just appearance
  • Include all states, not just the happy path
  • Provide redlines for complex layouts
  • Walk through the handoff with the developer

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

Files

Just SKILL.md in design-ops/skills/handoff-spec of Owl-Listener/designer-skills.

Open the folder on GitHubat commit 9a6930c

Used in 1 other repository

We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in Owl-Listener/designer-skills, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Handoff Spec 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.

Handoff Spec compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Handoff Spec this skillOwl-Listener/designer-skills2.9k1 repos~497Automated safety check: PassMIT
AI UI Generationyonatangross/orchestkit290—~2.7kAutomated safety check: PassMIT
Impeccablebestofjs/bestofjs3.1k27 repos~2.6kAutomated safety check: PassMIT
Figma Design System Builderwarpdotdev/warp65k2 repos~4.4kAutomated safety check: PassAGPL-3.0
Figma use_figma Plugin API Ruleswarpdotdev/warp65k4 repos~4.4kAutomated safety check: PassAGPL-3.0
UI StylingOhh-889/skyroc79513 repos~2.5kAutomated safety check: PassMIT

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Categories

Questions about Handoff Spec

What does Handoff Spec do?

Write the implementation handoff — measurements, behaviours, assets, states, and edge cases. Handoff Spec is an agent skill from Owl-Listener/designer-skills. Write the implementation handoff — measurements, behaviours, assets, states, and edge cases.

When should I use Handoff Spec?

Handoff Spec fits situations like: engineering picks up the work; tasks that involve Design systems; tasks that involve QA and bug reports.

How do I install Handoff Spec in Claude Code?

Run `npx skills add Owl-Listener/designer-skills --skill handoff-spec -a claude-code`. Or copy the skill folder (design-ops/skills/handoff-spec in Owl-Listener/designer-skills) into .claude/skills/handoff-spec in your project. Claude Code loads it when a task matches its description.

How do I install Handoff Spec in Codex?

Run `npx skills add Owl-Listener/designer-skills --skill handoff-spec -a codex`. Or copy the skill folder (design-ops/skills/handoff-spec in Owl-Listener/designer-skills) into .agents/skills/handoff-spec in your project. Codex loads it when a task matches its description.

Can I use Handoff Spec 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 Owl-Listener/designer-skills --skill handoff-spec -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/handoff-spec, .gemini/skills/handoff-spec, .github/skills/handoff-spec and .opencode/skills/handoff-spec in your project.

What does Handoff Spec need to run?

SKILL.md names no scripts, command-line tools or credentials: Handoff Spec is instructions for the agent only.

Does Handoff Spec 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 Handoff Spec 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. Review the folder before installing.

What licence does Handoff Spec use?

Handoff Spec 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 Handoff Spec use?

About 497 tokens (SKILL.md is roughly 2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Handoff Spec?

Skills that share tags, products or a category with Handoff Spec: AI UI Generation (yonatangross/orchestkit, 290 stars), Impeccable (bestofjs/bestofjs, 3.1k stars), Figma Design System Builder (warpdotdev/warp, 65k stars) and Figma use_figma Plugin API Rules (warpdotdev/warp, 65k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Handoff Spec?

Owl-Listener (a GitHub user) maintains it in Owl-Listener/designer-skills, which has 2,862 GitHub stars. The repository holds 107 skills in this directory. The repository was last updated on September 5, 2026.

Source: Owl-Listener/designer-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.