Borrowing it
Nothing to install: this file belongs to MCB-SMART-BOY/nixos-config. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/MCB-SMART-BOY/nixos-config/solo/.claude/skills/user/SKILL.mdgit clone --depth 1 https://github.com/MCB-SMART-BOY/nixos-configWrote 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.
[](https://agentmods.dev/skills/mcb-smart-boy/nixos-config/user)<a href="https://agentmods.dev/skills/mcb-smart-boy/nixos-config/user"><img src="https://agentmods.dev/badge/skills/mcb-smart-boy/nixos-config/user.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00042 | $0.01079 |
| Opus 5 | $0.00021 | $0.00540 |
| Sonnet 5 | $0.00008 | $0.00216 |
| Haiku 4.5 | $0.00004 | $0.00108 |
Grade A, and why
user 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 3d 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.
How it starts
The opening of the file, as written. The whole thing — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.
User
架构
NixOS 系统账户与 Home Manager 用户配置分属两个项目:
/home/admin/nixos-config/
modules/users.nix ← 系统账户、组和管理员权限
machines/<machine>/local.nix ← mcb.users / mcb.adminUsers
/home/admin/mcbctl/
profiles/ ← 16 个共享 profile 模块
home/ ← 单用户 Home Manager 入口、配置与脚本
添加用户
先在 NixOS 项目注册系统账户,再独立激活 mcbctl 的 Home Manager 配置:
cd /home/admin/nixos-config
./run.sh add-user alice --admin
./run.sh deploy --host nixos
cd /home/admin/mcbctl
nix flake check
在调用方 flake 中显式暴露 Alice 的 Home Manager target;Linux target 的 homeModules.linux 会由 helper 自动组合,Niri 由 desktopEnvironment = "niri" 触发;NixOS integration 与宿主应用能力仍通过 extraModules 显式提供:
homeConfigurations."alice@x86_64-linux" =
inputs.mcbctl.lib.mkHomeConfiguration {
system = "x86_64-linux";
username = "alice";
homeDirectory = "/home/alice";
desktopEnvironment = "niri";
extraModules = [
inputs.mcbctl.homeModules.nixos
{
mcb.desktop.providers.kazumi = true;
mcb.desktop.providers.steam = true;
}
];
};
nix run /home/admin/mcbctl#home-manager -- \
switch --flake /path/to/caller-flake#alice@x86_64-linux
admin 当前主机可直接使用 mcbctl 的完整 target:
cd /home/admin/mcbctl
nix run .#home-manager -- switch -b hm-backup --flake .#admin@nixos
该 target 只适用于当前 x86_64-linux NixOS 工作站,显式组合 Niri、NixOS integration、16 个 profile 和 Kazumi/Steam/WeMeet/Clash Verge capability;首次接管已有用户文件时保留 -b hm-backup,接管完成后可省略。portable admin@x86_64-linux target 仍只组合 portable core。nixos-config 的 run.sh add-user 只更新 machines/<machine>/local.nix 中的系统账户;它不创建 Home Manager 文件。mcbctl 不自动发现系统用户或机器;其他用户须通过 lib.mkHomeConfiguration { system; username; homeDirectory; desktopEnvironment ? null; extraModules ? [ ]; } 显式提供身份、平台层和宿主 capability。
修改现有用户
| 改什么 | 去 |
|---|---|
| 系统账户与权限 | /home/admin/nixos-config/modules/users.nix + machines/<machine>/local.nix |
| 软件选择 | /home/admin/mcbctl/home/packages.nix + /home/admin/mcbctl/profiles/ |
| dotfiles | /home/admin/mcbctl/home/config/ |
| Git 身份 | 调用方通过 extraModules 显式传入 /home/admin/mcbctl/home/local.nix(gitignored、仅非敏感覆盖) |
| Shell 配置 | /home/admin/mcbctl/home/shell.nix |
| Niri 配置 | /home/admin/mcbctl/home/config/niri/ |
| 用户脚本 | /home/admin/mcbctl/home/scripts/<name> + scripts.nix |
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.
- 3d ago Changed · +20 lines scan B → A ff2e0ba2916a
- 8d ago First seen · 68 lines · 42 tokens per session scan B 215556d0a16c
user is a skill published in the GitHub repository MCB-SMART-BOY/nixos-config (10 stars, last pushed 3d ago), licensed Apache-2.0. It adds 42 tokens to every session and 1,079 once invoked, about $0.0002 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 2026-08-31.
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