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/rebuild/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/rebuild)<a href="https://agentmods.dev/skills/mcb-smart-boy/nixos-config/rebuild"><img src="https://agentmods.dev/badge/skills/mcb-smart-boy/nixos-config/rebuild/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/mcb-smart-boy/nixos-config/rebuild"><img src="https://agentmods.dev/badge/skills/mcb-smart-boy/nixos-config/rebuild.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00031 | $0.00559 |
| Opus 5 | $0.00015 | $0.00280 |
| Sonnet 5 | $0.00006 | $0.00112 |
| Haiku 4.5 | $0.00003 | $0.00056 |
Grade B, and why
rebuild scanned grade B with 1 finding 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 11d 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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
sudo nixos-rebuild switch --flake /etc/nixos#nixos What it actually says
Rebuild
阶段 1：前置检查
.claude/skills/run-nixos-config/validate.sh
nix flake check # 完整 eval 检查（失败则停止！）
git status # 确认新增 tracked 文件已 git add
验证脚本先检查所有可部署机器都有已跟踪的 machines/<machine>/hardware-configuration.nix（排除仅求值的 ci 和 _template），再从当前 checkout 完整求值。它不依赖 /etc/nixos 中私有的 local.nix 或 hardware-gpu.nix。
阶段 2：构建验证
当前机器：
nixos-rebuild build --flake /etc/nixos#nixos
其他机器将 nixos 替换为实际 flake 输出名 <machine>；不要使用 host、default 或主机名猜测输出。失败 → 进入 /debug。
阶段 3：切换
sudo nixos-rebuild switch --flake /etc/nixos#nixos
部署其他机器时同样使用实际的 /etc/nixos#<machine> 输出；ci 仅求值，不可切换。
阶段 4：验证
systemctl --failed # 检查失败服务
journalctl -u greetd -b # 检查登录管理器
安全规则
- 绝不在
nix flake check失败时switch - 绝不在构建失败时尝试
switch - 内核/initrd 变更 → 用
boot而非switch（重启后生效） stateVersion→ 警告用户不要改
回滚
sudo nixos-rebuild list-generations
sudo nixos-rebuild switch --rollback
特殊场景
nixos-rebuild build --flake /etc/nixos#nixos # 只构建
sudo nixos-rebuild boot --flake /etc/nixos#nixos # 下次重启生效
nixos-rebuild build-vm --flake /etc/nixos#nixos # VM 测试
nix flake check # 只检查
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.
- 11d ago First seen · 65 lines · 31 tokens per session scan B 3643cdea4408
rebuild is a skill published in the GitHub repository MCB-SMART-BOY/nixos-config (10 stars, last pushed 5d ago), licensed Apache-2.0. It adds 31 tokens to every session and 559 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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