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Agent skill

Diff Review

by nexu-io in nexu-io/open-design

Render the patch-edit run's accumulated changes as a reviewable diff, surface it through a GenUI choice surface, and persist the user's accept / reject decision into the artifact manifest.

Apache-2.0Auto-check passedFrontend & Design

Install Diff Review

skills CLI
$ npx skills add nexu-io/open-design --skill diff-review -a claude-code

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

GitHub CLI
$ gh skill install nexu-io/open-design diff-review --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/nexu-io/open-design.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/_official/atoms/diff-review .claude/skills/diff-review && 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
diff-review
GitHub stars
100k
Token cost
~508 tokens
SKILL.md length
166 words
Files
2
Skills in repo
245
Repo updated
First seen
Licence
Apache-2.0

At a glance

Render the patch-edit run's accumulated changes as a reviewable diff, surface it through a GenUI choice surface, and persist the user's accept / reject decision into the artifact manifest.

  • Frontend & Design work in your project
  • SKILL.md covers Inputs, Output, Convergence and Anti-patterns the prompt…, plus 1 more section
  • Calls git

What it does

Diff Review is an agent skill from nexu-io/open-design. Render the patch-edit run's accumulated changes as a reviewable diff, surface it through a GenUI choice surface, and persist the user's accept / reject decision into the artifact manifest.

Its SKILL.md is about 510 tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `open-design.json`).

It sits in Frontend & Design. The repository describes itself as: 🎨 Best DeepSeek Harness Design Plugin. The open-source Claude Design alternative. 🖥️ Local-first desktop app. 🖼️ Your coding agent becomes the design engine: prototypes… The licence is Apache-2.0.

When your agent uses it

  • Frontend & Design work in your project

Example prompts

  • “/diff-review”

What it can do on your machine

Read from SKILL.md and the folder at commit 3449fa6. 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

    Shell commands in SKILL.md call:

    • git

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

  • Network

    No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.

    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

Diff Review loads about 508 tokens when it runs. Until then it costs about 50 tokens; SKILL.md has 166 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~50
When it runs · the whole SKILL.md, loaded when a task matches
~508

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 nexu-io/open-design at commit 3449fa6, republished under its Apache-2.0 licence (© nexu-io). 166 words, ~508 tokens.

Download SKILL.mdSave it as .claude/skills/diff-review/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
diff-review
description
Render the patch-edit run's accumulated changes as a reviewable diff, surface it through a GenUI choice surface, and persist the user's accept / reject decision into the artifact manifest.
od.scenario
code-migration
od.mode
review

Diff review

Spec §20.3 / §21.3.2: a code-migration / tune-collab handoff is worthless without a human-reviewable diff. This atom is the "present the patch, capture the decision" stage.

Inputs

  • The project cwd's accumulated edits since the run started (or since the previous diff-review iteration).
  • plan/steps.json for context per file.

Output

text
project-cwd/
└── review/
    ├── diff.patch        # unified diff (git apply-shaped)
    ├── summary.md        # human-friendly per-file walkthrough
    ├── decision.json     # { decision: 'accept' | 'reject' | 'partial', accepted_files: [...], rejected_files: [...], reviewer: 'user' | 'agent' }
    └── meta.json         # { generatedAt, atomDigest, planRevision }

The atom raises a choice GenUI surface with the three top-level decisions (accept / reject / partial). On partial the user flips per-file decisions through follow-up surfaces.

Convergence

The atom completes when decision.json has a non-empty decision. Acceptance writes handoffKind: 'patch' (or 'deployable-app' when a successful build-test is on file) into the eventual artifact manifest; rejection rolls back the patch via git restore or the equivalent in the code-import-bound repo path.

Anti-patterns the prompt fragment forbids

  • Skipping the surface and assuming acceptance.
  • Generating a decision.json that lacks accepted_files / rejected_files on partial decisions.
  • Rolling back files outside plan/steps.json's union of files[] — the patch boundary is a contract.

Status

Implemented by the daemon runner in apps/daemon/src/plugins/atoms/diff-review.ts, with GenUI decisions persisted by apps/daemon/src/plugins/atoms/diff-review-genui-bridge.ts.

© nexu-io, Apache-2.0. 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 1 other file in plugins/_official/atoms/diff-review of nexu-io/open-design.

  • SKILL.md
  • open-design.json

Open the folder on GitHubat commit 3449fa6

Compare with similar skills

Diff Review 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.

Diff Review compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Diff Review this skillnexu-io/open-design100k—~508Automated safety check: PassApache-2.0
Web Artifacts Builderanthropics/skills180k41 repos~769Automated safety check: PassApache-2.0
React Doctormakeplane/plane61k12 repos~657Automated safety check: PassAGPL-3.0
Impeccablebestofjs/bestofjs3.1k27 repos~2.6kAutomated safety check: PassMIT
Figma Design System Builderwarpdotdev/warp65k2 repos~4.4kAutomated safety check: PassAGPL-3.0
Web Interface Guidelines Reviewervercel-labs/openreview1.7k98 repos~308Automated safety check: PassNone

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Categories

Questions about Diff Review

What does Diff Review do?

Render the patch-edit run's accumulated changes as a reviewable diff, surface it through a GenUI choice surface, and persist the user's accept / reject decision into the artifact manifest. Diff Review is an agent skill from nexu-io/open-design. Render the patch-edit run's accumulated changes as a reviewable diff, surface it through a GenUI choice surface, and persist the user's accept / reject decision into the artifact manifest.

When should I use Diff Review?

Diff Review fits situations like: frontend & Design work in your project.

How do I install Diff Review in Claude Code?

Run `npx skills add nexu-io/open-design --skill diff-review -a claude-code`. Or copy the skill folder (plugins/_official/atoms/diff-review in nexu-io/open-design) into .claude/skills/diff-review in your project. Claude Code loads it when a task matches its description.

How do I install Diff Review in Codex?

Run `npx skills add nexu-io/open-design --skill diff-review -a codex`. Or copy the skill folder (plugins/_official/atoms/diff-review in nexu-io/open-design) into .agents/skills/diff-review in your project. Codex loads it when a task matches its description.

Can I use Diff Review 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 nexu-io/open-design --skill diff-review -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/diff-review, .gemini/skills/diff-review, .github/skills/diff-review and .opencode/skills/diff-review in your project.

What does Diff Review need to run?

Going by SKILL.md and its folder, Diff Review needs the command-line tools its instructions call (git).

Does Diff Review access the network?

SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Diff Review 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 Diff Review use?

Diff Review is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Diff Review use?

About 508 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 Diff Review?

Skills that share tags, products or a category with Diff Review: Web Artifacts Builder (anthropics/skills, 180k stars), React Doctor (makeplane/plane, 61k stars), Impeccable (bestofjs/bestofjs, 3.1k stars) and Figma Design System Builder (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 Diff Review?

nexu-io (a GitHub organization) maintains it in nexu-io/open-design, which has 99,905 GitHub stars. The repository holds 245 skills in this directory. The repository was last updated on October 8, 2026.

Source: nexu-io/open-design on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.