Agent skill

Build Test

Run the project's build / typecheck / lint / test commands and emit the build.passing + tests.passing signals devloop convergence reads.

Apache-2.0Auto-check passedDevelopment

Install Build Test

skills CLI

$ npx skills add nexu-io/open-design --skill build-test -a claude-code

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

GitHub CLI

$ gh skill install nexu-io/open-design build-test --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/build-test .claude/skills/build-test && 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/

Paste into Claude Code

Install the "build-test" agent skill from https://github.com/nexu-io/open-design/tree/main/plugins/_official/atoms/build-test into .claude/skills/build-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "build-test", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/nexu-io/open-design/tree/main/plugins/_official/atoms/build-test

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add nexu-io/open-design --skill build-test -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install nexu-io/open-design build-test --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/_official/atoms/build-test .agents/skills/build-test && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "build-test" agent skill from https://github.com/nexu-io/open-design/tree/main/plugins/_official/atoms/build-test into .agents/skills/build-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "build-test", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add nexu-io/open-design --skill build-test -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install nexu-io/open-design build-test --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/_official/atoms/build-test .cursor/skills/build-test && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "build-test" agent skill from https://github.com/nexu-io/open-design/tree/main/plugins/_official/atoms/build-test into .cursor/skills/build-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "build-test", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/nexu-io/open-design.git --path plugins/_official/atoms/build-test

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add nexu-io/open-design --skill build-test -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install nexu-io/open-design build-test --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/_official/atoms/build-test .gemini/skills/build-test && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "build-test" agent skill from https://github.com/nexu-io/open-design/tree/main/plugins/_official/atoms/build-test into .gemini/skills/build-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "build-test", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install nexu-io/open-design build-test

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add nexu-io/open-design --skill build-test -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/_official/atoms/build-test .github/skills/build-test && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "build-test" agent skill from https://github.com/nexu-io/open-design/tree/main/plugins/_official/atoms/build-test into .github/skills/build-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "build-test", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add nexu-io/open-design --skill build-test -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install nexu-io/open-design build-test --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/nexu-io/open-design.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/_official/atoms/build-test .opencode/skills/build-test && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "build-test" agent skill from https://github.com/nexu-io/open-design/tree/main/plugins/_official/atoms/build-test into .opencode/skills/build-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "build-test", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: build-test
GitHub stars: 100k
Token cost: ~619 tokens
SKILL.md length: 229 words
Files: 2
Skills in repo: 245
Repo updated: Oct 9, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

Run the project's build / typecheck / lint / test commands and emit the build.passing + tests.passing signals devloop convergence reads.

Development work in your project
SKILL.md covers Inputs, Default commands by framework, Output and Convergence, plus 2 more sections
Calls pnpm

What it does

Build Test is an agent skill from nexu-io/open-design. Run the project's build / typecheck / lint / test commands and emit the build.passing + tests.passing signals devloop convergence reads.

Its SKILL.md is about 620 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 Development. It works with pnpm. 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

Development work in your project

Example prompts

“/build-test”

What it can do on your machine

Read from SKILL.md and the folder at commit d9dd6fe. 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:
- pnpm
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use pnpm, 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

Build Test loads about 619 tokens when it runs. Until then it costs about 37 tokens; SKILL.md has 229 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~37
When it runs · the whole SKILL.md, loaded when a task matches: ~619

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 d9dd6fe, republished under its Apache-2.0 licence (© nexu-io). 229 words, ~619 tokens.

Download SKILL.mdSave it as .claude/skills/build-test/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: build-test
description: Run the project's build / typecheck / lint / test commands and emit the build.passing + tests.passing signals devloop convergence reads.
od.scenario: code-migration
od.mode: critique

Build test

Spec §20.2 / §22.4: the "subjective critique-theater panel" is not enough on its own — a code-migration / tune-collab run must prove the build still passes. This atom shells out to the project's declared test commands and emits structured signals the devloop's until evaluator reads.

Inputs

The active target stack (recorded in code/index.json + plan.md's targetStack block).
The user's optional override (od plugin run --input testCommand='pnpm test').

Default commands by framework

framework	typecheck	test
next	`pnpm typecheck`	`pnpm test`
vite	`pnpm typecheck`	`pnpm test`
remix	`pnpm typecheck`	`pnpm test`
custom	(read from `package.json.scripts`)	(read from `package.json.scripts`)

Output

text

project-cwd/
└── critique/
    ├── build-test.json   # { build: 'passing' | 'failing', tests: 'passing' | 'failing' | 'skipped', durationMs, commandsRun: [...], failures: [...] }
    └── build-test.log    # raw stdout / stderr (truncated to the runner's logBudgetBytes limit, default 1 MiB)

The atom emits two signals the devloop reads:

build.passing: boolean — the typecheck command exited 0.
tests.passing: boolean — the test command exited 0.

Plus the legacy critique.score so existing pipelines that read the score keep working: 5 when both pass, 3 when only build passes, 1 when both fail.

Convergence

Pipelines wire the atom into a devloop:

jsonc

{
  "id": "verify",
  "atoms": ["patch-edit", "build-test"],
  "repeat": true,
  "until": "(build.passing && tests.passing) || iterations >= 8"
}

Anti-patterns the prompt fragment forbids

Running tests on a partially-edited working tree (the atom always runs after patch-edit, and only when plan.steps's current step is in completed state).
Suppressing test failures by changing test files; that violates the rewrite-plan ownership rule.
Setting tests: 'skipped' without a non-empty reason field.

Status

Implemented by the daemon runner in apps/daemon/src/plugins/atoms/build-test.ts. It executes the configured build and test commands, bounds runtime and captured logs, and persists the report and log outputs above.

Files

SKILL.md and 1 other file in plugins/_official/atoms/build-test of nexu-io/open-design.

SKILL.md
open-design.json

Open the folder on GitHubat commit d9dd6fe

Compare with similar skills

Build Test 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.

Build Test compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Build Test this skillnexu-io/open-design	100k	—	~619	Automated safety check: Pass	Apache-2.0	today
@pierre/diffs Code Renderingpierrecomputer/pierre	6.3k	2 repos	~803	Automated safety check: Pass	Apache-2.0	yesterday
React Router Release Notes Prepremix-run/react-router	57k	—	~1.1k	Automated safety check: Pass	MIT	yesterday
Link Workspace Packagesnomcopter/react-mosaic	4.8k	6 repos	~760	Automated safety check: Pass	Custom licence	11 days ago
Pull Requestspnpm/pnpm	37k	—	~2.2k	Automated safety check: Pass	MIT	today
Release Notespnpm/pnpm	37k	—	~2.8k	Automated safety check: Pass	MIT	today

Similar skills

@pierre/diffs Code Rendering
pierrecomputer/pierre
Guides an agent through using @pierre/diffs to render syntax-highlighted files and diffs, and to build editing and review surfaces in React or plain JavaScript.
6.3k GitHub starsUsed in 2 repos~803 tokens
DevelopmentAuto-check passed
React Router Release Notes Prep
remix-run/react-router
Polishes pending React Router change files before the versioning scripts run, and decides whether a long-form What's Changed section is warranted.
57k GitHub stars~1.1k tokensUpdated yesterday
DevelopmentAuto-check passed
Link Workspace Packages
nomcopter/react-mosaic
Link workspace packages in monorepos (npm, yarn, pnpm, bun).
4.8k GitHub starsUsed in 6 repos~760 tokens
DevelopmentAuto-check passed
Pull Requests
pnpm/pnpm
Take a change through a pull request in the pnpm repository — opening it, then staying with it after every push until CI is green and the review round is quiet.
37k GitHub stars~2.2k tokensUpdated today
DevelopmentAuto-check passed
Release Notes
pnpm/pnpm
Curate a pending release page - merging entries that describe one change, dropping notes for defects that never shipped, ordering by importance, and checking the version the intents ask for.
37k GitHub stars~2.8k tokensUpdated today
DevelopmentAuto-check passed
Verdaccio Pull Request Workflow
verdaccio/verdaccio
Takes a change through a verdaccio pull request: branch, local checks, changeset, title and body, labels, CI and review rounds, and ports to other release lines.
18k GitHub stars~1.9k tokensUpdated yesterday
DevelopmentAuto-check passed

More from nexu-io/open-design

All 245 skills in this repo

Humanize PPT
nexu-io/open-design
Turns raw notes into a talk-ready slide outline with per-page image, diagram or video decisions, then checks the rendered deck against that outline.
100k GitHub stars~4k tokensUpdated today
Auto-check passed
Last 30 Days Trend Research
nexu-io/open-design
Produces a cited Markdown briefing on recent community sentiment and social reaction to a topic, labeling every source it could not actually check.
100k GitHub stars~1.3k tokensUpdated today
Auto-check passed
OpenDesign Contribution Flow
nexu-io/open-design
Helps newcomers contribute to OpenDesign: ship a skill or design system, translate docs, fix docs or report a bug, ending in a pull request or issue.
100k GitHub stars~3.5k tokensUpdated today
Auto-check: notes
Chat Motion Overlay Generator
nexu-io/open-design
Turns a chat transcript or screenshot into a configurable animated chat clip, rendered as a Remotion bundle with optional transparency.
100k GitHub stars~1.1k tokensUpdated today
Auto-check passed
Flowai Live Dashboard Template
nexu-io/open-design
Team-management dashboard skill in the FlowAI aesthetic — three tabs (Team Members, Team Details, Activity Log), KPI stat row, member table, role distribution bar chart, online presence and activity…
100k GitHub stars~865 tokensUpdated today
Auto-check passed
Hatch Pet
nexu-io/open-design
Create, repair, validate, preview, and package Codex-compatible animated pet spritesheets from character art, screenshots, generated images, or visual references.
100k GitHub stars~6k tokensUpdated today
Auto-check passed

Works with

pnpm

Questions about Build Test

What does Build Test do?

Run the project's build / typecheck / lint / test commands and emit the build.passing + tests.passing signals devloop convergence reads. Build Test is an agent skill from nexu-io/open-design.passing signals devloop convergence reads.

When should I use Build Test?

Build Test fits situations like: development work in your project.

How do I install Build Test in Claude Code?

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

How do I install Build Test in Codex?

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

Can I use Build Test 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 build-test -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/build-test, .gemini/skills/build-test, .github/skills/build-test and .opencode/skills/build-test in your project.

What does Build Test need to run?

Going by SKILL.md and its folder, Build Test needs the command-line tools its instructions call (pnpm).

Does Build Test 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 Build Test 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 Build Test use?

Build Test 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 Build Test use?

About 619 tokens (SKILL.md is roughly 2.5k 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 Build Test?

Skills that share tags, products or a category with Build Test: @pierre/diffs Code Rendering (pierrecomputer/pierre, 6.3k stars), React Router Release Notes Prep (remix-run/react-router, 57k stars), Link Workspace Packages (nomcopter/react-mosaic, 4.8k stars) and Pull Requests (pnpm/pnpm, 37k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Build Test?

nexu-io (a GitHub organization) maintains it in nexu-io/open-design, which has 100,100 GitHub stars. The repository holds 245 skills in this directory. The repository was last updated on October 9, 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.

Install Build Test

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Build test

Inputs

Default commands by framework

Output

Convergence

Anti-patterns the prompt fragment forbids

Status

Files

Compare with similar skills

Similar skills

More from nexu-io/open-design

Related

Questions about Build Test