Es Modules
thedaviddias/Front-End-Checklist
A skill your agent uses when reviewing scripts, client components, bundles, or runtime behavior related to Use ES modules (import/export).
Create and structure Nix modules for darwin, NixOS, or home-manager
No licenceAuto-check passed
Install Nix Module
$ npx skills add r17x/universe --skill nix-module -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install r17x/universe nix-module --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/r17x/universe.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/nix/module .claude/skills/nix-module && rm -rf skills-srcUse ~/.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/
Install the "nix-module" agent skill from https://github.com/r17x/universe/tree/main/.claude/skills/nix/module into .claude/skills/nix-module/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nix-module", 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 install https://github.com/r17x/universe/tree/main/.claude/skills/nix/moduleType 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.
$ npx skills add r17x/universe --skill nix-module -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install r17x/universe nix-module --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/r17x/universe.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/nix/module .agents/skills/nix-module && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "nix-module" agent skill from https://github.com/r17x/universe/tree/main/.claude/skills/nix/module into .agents/skills/nix-module/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nix-module", 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.
$ npx skills add r17x/universe --skill nix-module -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install r17x/universe nix-module --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/r17x/universe.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/nix/module .cursor/skills/nix-module && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "nix-module" agent skill from https://github.com/r17x/universe/tree/main/.claude/skills/nix/module into .cursor/skills/nix-module/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nix-module", 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 https://github.com/r17x/universe.git --path .claude/skills/nix/module--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add r17x/universe --skill nix-module -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install r17x/universe nix-module --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/r17x/universe.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/nix/module .gemini/skills/nix-module && rm -rf skills-srcUse ~/.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/
Install the "nix-module" agent skill from https://github.com/r17x/universe/tree/main/.claude/skills/nix/module into .gemini/skills/nix-module/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nix-module", 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.
$ gh skill install r17x/universe nix-moduleInstalls 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).
$ npx skills add r17x/universe --skill nix-module -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/r17x/universe.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/nix/module .github/skills/nix-module && rm -rf skills-srcUse ~/.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/
Install the "nix-module" agent skill from https://github.com/r17x/universe/tree/main/.claude/skills/nix/module into .github/skills/nix-module/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nix-module", 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.
$ npx skills add r17x/universe --skill nix-module -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install r17x/universe nix-module --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/r17x/universe.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/nix/module .opencode/skills/nix-module && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "nix-module" agent skill from https://github.com/r17x/universe/tree/main/.claude/skills/nix/module into .opencode/skills/nix-module/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "nix-module", 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
nix-module- GitHub stars
- 151
- Token cost
- ~599 tokens
- SKILL.md length
- 69 words
- Files
- 1
- Skills in repo
- 5
- Repo updated
- First seen
- Licence
- None found
At a glance
Create and structure Nix modules for darwin, NixOS, or home-manager
- Works in 6 steps: Use lib.mkEnableOption for enable flags → Use lib.mkDefault for overridable defaults → Use lib.mkForce sparingly, only when… → …
- SKILL.md covers Module Template, Common Option Types, Module Patterns and Darwin-specific, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Nix Module is an agent skill from r17x/universe. Create and structure Nix modules for darwin, NixOS, or home-manager
Its SKILL.md is about 600 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
The repository describes itself as: let universe speak itself ❄️ ƛ.
Example prompts
- “/nix-module”
Requirements
- Pre-approved tools (allowed-tools): Read, Write, Edit, Glob
Workflow steps
6 steps, taken from the first numbered list in SKILL.md.
- Use lib.mkEnableOption for enable flags
- Use lib.mkDefault for overridable defaults
- Use lib.mkForce sparingly, only when necessary
- Keep modules focused on single responsibility
- Document options with description
- Use lib.getExe for binary paths
What it can do on your machine
Read from SKILL.md and the folder at commit 489dbda. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
ReadWriteEditGlob
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are nix).
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
Nix Module loads about 599 tokens when it runs. Until then it costs about 20 tokens; SKILL.md has 69 words of instructions outside code blocks.
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
Without a licence we can't republish the file, so here is its outline and opening line. It has 69 words (~599 tokens).
- name
- nix-module
- allowed-tools
- Read, Write, Edit, Glob
Files
Just SKILL.md in .claude/skills/nix/module of r17x/universe.
Open the folder on GitHubat commit 489dbda
Compare with similar skills
Nix Module 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Nix Module this skillr17x/universe | 151 | — | ~599 | Automated safety check: Pass | None | |
| Es Modulesthedaviddias/Front-End-Checklist | 74k | — | ~482 | Automated safety check: Pass | MIT | |
| Devcontainers Nixsickn33/agentic-awesome-skills | 47k | 1 repos | ~2.6k | Automated safety check: Pass | MIT | |
| Splitting Oversized ModulesPostHog/posthog | 40k | — | ~2.2k | Automated safety check: Pass | Custom licence | |
| Abp Moduleabpframework/abp | 14k | — | ~1.6k | Automated safety check: Pass | LGPL-3.0 | |
| Extract ModuleJetBrains/intellij-community | 21k | — | ~5.2k | Automated safety check: Pass | Custom licence |
Similar skills
Devcontainers Nix
sickn33/agentic-awesome-skills
Create reproducible development environments with Dev Containers, Nix flakes, and Devbox for consistent toolchains across teams.
- Official
Splitting Oversized Modules
PostHog/posthog
Split an oversized Python module (a thousand-plus-line logic.py, models.py, api.py, or its test file) into a package of one module per concern, mechanically and provably without changing behavior.
Abp Module
abpframework/abp
ABP reusable Module solution template - EF Core + MongoDB dual support, virtual methods for extensibility, DbTablePrefix, module options pattern, entity extension, separate connection string.
- Official
Extract Module
JetBrains/intellij-community
Extract optional plugin dependencies into IntelliJ content modules.
- Official
Module Dependencies
JetBrains/intellij-community
Add or modify IntelliJ module dependencies in .iml files. An agent skill from JetBrains/intellij-community.
More from r17x/universe
Nix
r17x/universe
Nix flakes, nix-darwin, NixOS, and home-manager development assistance
Nix Debug
r17x/universe
Deep debugging of Nix expressions, evaluation, and derivations
Nix Flake
r17x/universe
Debug and evaluate Nix flake expressions. An agent skill from r17x/universe.
Nix Service
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Manage nix-managed launchd and systemd services. An agent skill from r17x/universe.
Questions about Nix Module
What does Nix Module do?
Create and structure Nix modules for darwin, NixOS, or home-manager. Nix Module is an agent skill from r17x/universe.
How do I install Nix Module in Claude Code?
Run `npx skills add r17x/universe --skill nix-module -a claude-code`. Or copy the skill folder (.claude/skills/nix/module in r17x/universe) into .claude/skills/nix-module in your project. Claude Code loads it when a task matches its description.
How do I install Nix Module in Codex?
Run `npx skills add r17x/universe --skill nix-module -a codex`. Or copy the skill folder (.claude/skills/nix/module in r17x/universe) into .agents/skills/nix-module in your project. Codex loads it when a task matches its description.
Can I use Nix Module 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 r17x/universe --skill nix-module -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/nix-module, .gemini/skills/nix-module, .github/skills/nix-module and .opencode/skills/nix-module in your project.
What does Nix Module need to run?
SKILL.md names no scripts, command-line tools or credentials: Nix Module is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Write, Edit, Glob.
Does Nix Module 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 Nix Module 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 Nix Module use?
No licence was found for Nix Module or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Nix Module use?
About 599 tokens (SKILL.md is roughly 2.4k 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 Nix Module?
Skills that share tags, products or a category with Nix Module: Es Modules (thedaviddias/Front-End-Checklist, 74k stars), Devcontainers Nix (sickn33/agentic-awesome-skills, 47k stars), Splitting Oversized Modules (PostHog/posthog, 40k stars) and Abp Module (abpframework/abp, 14k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Nix Module?
r17x (a GitHub user) maintains it in r17x/universe, which has 151 GitHub stars. The repository holds 5 skills in this directory. The repository was last updated on October 4, 2026.
Source: r17x/universe on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.