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Agent skill

Systems Administration

by cbrock84 in cbrock84/headcount

Runs servers and corporate systems — patching, configuration baselines, change control, capacity, and the routine that prevents incidents.

MITAuto-check passed

Install Systems Administration

skills CLI
$ npx skills add cbrock84/headcount --skill systems-administration -a claude-code

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

GitHub CLI
$ gh skill install cbrock84/headcount systems-administration --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/cbrock84/headcount.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/it-operations/skills/systems-administration .claude/skills/systems-administration && 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
systems-administration
GitHub stars
2k
Token cost
~822 tokens
SKILL.md length
433 words
Files
2 (incl. references)
Skills in repo
175
Repo updated
First seen
Licence
MIT

At a glance

Runs servers and corporate systems — patching, configuration baselines, change control, capacity, and the routine that prevents incidents.

  • SKILL.md covers Configuration baselines and…, Patching as a cadence, Change control proportionate… and Know what you have, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Systems Administration is an agent skill from cbrock84/headcount. Runs servers and corporate systems — patching, configuration baselines, change control, capacity, and the routine that prevents incidents. Use this to establish a patching cadence, standardize server configuration, plan a maintenance window, decide change control for infrastructure, or clean up systems that have drifted from any known state.

Its SKILL.md is about 820 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/sources.md`).

The repository describes itself as: An agent organization structured as a company — 15+ departments, 125+ skills, each independently installable, citing the standards and regulators that settle the question. Runs… The licence is MIT.

Example prompts

  • “/systems-administration”

What it can do on your machine

Read from SKILL.md and the folder at commit 98d1c17. 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

    No scripts in the folder and no shell commands in SKILL.md.

    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

Systems Administration loads about 822 tokens when it runs, and up to ~1.3k if it reads all its reference files. Until then it costs about 92 tokens; SKILL.md has 433 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~92
When it runs · the whole SKILL.md, loaded when a task matches
~822
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.3k

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 cbrock84/headcount at commit 98d1c17, republished under its MIT licence (© cbrock84). 433 words, ~822 tokens.

Download SKILL.mdSave it as .claude/skills/systems-administration/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
systems-administration
description
Runs servers and corporate systems — patching, configuration baselines, change control, capacity, and the routine that prevents incidents. Use this to establish a patching cadence, standardize server configuration, plan a maintenance window, decide change control for infrastructure, or clean up systems that have drifted from any known state.

Systems administration

Well-run systems are boring. The work is in the routine that keeps them that way, and almost every serious incident traces back to a routine that was skipped.

Cloud environment design belongs to technology:cloud-infrastructure; this is operating the systems the company runs on.

Configuration baselines and drift

Every system class needs a defined baseline: build, hardening, agents, logging, accounts. Systems built by hand from memory diverge immediately and cannot be reasoned about as a group.

Drift is the real enemy. Detect it continuously and correct rather than document — a system that no longer matches its baseline is a system whose behavior under patching or failover is unknown.

The strongest form is disposability: rebuild rather than repair. A system you can rebuild in an hour never accumulates the sediment of a decade of manual fixes.

Patching as a cadence

Set a regular, predictable window and hold it. Ad hoc patching means patching happens when someone worries, which is never in proportion to actual risk.

Tier by exposure: internet-facing systems on the shortest cycle, then internal, then isolated. Emergency patching is a separate path with its own authority, used for actively exploited vulnerabilities — security:vulnerability-management decides what is urgent, this skill executes it.

Track coverage, not activity. "Patching is running" is not an answer; "97% of servers are within 30 days, here are the twelve that are not and why" is.

Show full SKILL.md (203 more words)Show less

Change control proportionate to risk

Heavyweight approval for trivial changes produces circumvention, and circumvention produces unrecorded changes, which is worse than no process.

Tier it: standard pre-approved changes, normal changes with review, emergency changes with after-the-fact record. Every change needs an owner, a back-out plan, and a record — the back-out plan being the part most often assumed rather than written.

Maintenance windows exist to make disruption predictable. Announce them, keep them, and finish inside them.

Know what you have

An unmanaged system is a system nobody patches. Reconcile what is running against it-operations:it-asset-management regularly, and treat anything unaccounted for as urgent — the server nobody owns is the one still running an unsupported operating system.

Sources

references/sources.md in this skill lists the outside authorities that settle the questions here — what each one is authoritative for, and what you may do with it. Check them before answering on anything they cover, and cite what you used. Most are free to read and not free to reproduce; the use note on each is binding.

Never

  • Repair a drifted system without correcting the baseline that let it drift.
  • Patch on worry rather than cadence.
  • Make a change with no back-out plan.
  • Leave a discovered unmanaged system unclaimed.

© cbrock84, MIT. 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 (references) in plugins/it-operations/skills/systems-administration of cbrock84/headcount.

  • SKILL.md
  • references/sources.md

Open the folder on GitHubat commit 98d1c17

Compare with similar skills

Systems Administration 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.

Systems Administration compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Systems Administration this skillcbrock84/headcount2k—~822Automated safety check: PassMIT
Surgical PatchJuliusBrussee/caveman110k1 repos~166Automated safety check: PassApache-2.0
Post-Patch Validationtrailofbits/skills7.4k—~3.8kAutomated safety check: NotesCC-BY-SA-4.0
Patch Editnexu-io/open-design100k—~470Automated safety check: PassApache-2.0
Patch Release CheckClickHouse/ClickHouse50k—~4kAutomated safety check: NotesApache-2.0
Slate Patchudecode/plate17k—~3.8kAutomated safety check: PassCustom licence

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Questions about Systems Administration

What does Systems Administration do?

Runs servers and corporate systems — patching, configuration baselines, change control, capacity, and the routine that prevents incidents. Systems Administration is an agent skill from cbrock84/headcount. Runs servers and corporate systems — patching, configuration baselines, change control, capacity, and the routine that prevents incidents.

How do I install Systems Administration in Claude Code?

Run `npx skills add cbrock84/headcount --skill systems-administration -a claude-code`. Or copy the skill folder (plugins/it-operations/skills/systems-administration in cbrock84/headcount) into .claude/skills/systems-administration in your project. Claude Code loads it when a task matches its description.

How do I install Systems Administration in Codex?

Run `npx skills add cbrock84/headcount --skill systems-administration -a codex`. Or copy the skill folder (plugins/it-operations/skills/systems-administration in cbrock84/headcount) into .agents/skills/systems-administration in your project. Codex loads it when a task matches its description.

Can I use Systems Administration 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 cbrock84/headcount --skill systems-administration -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/systems-administration, .gemini/skills/systems-administration, .github/skills/systems-administration and .opencode/skills/systems-administration in your project.

What does Systems Administration need to run?

SKILL.md names no scripts, command-line tools or credentials: Systems Administration is instructions for the agent only.

Does Systems Administration 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 Systems Administration 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 Systems Administration use?

Systems Administration is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Systems Administration use?

About 822 tokens (SKILL.md is roughly 3.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 438 tokens, read only when the agent opens those files.

What are the alternatives to Systems Administration?

Skills that share tags, products or a category with Systems Administration: Surgical Patch (JuliusBrussee/caveman, 110k stars), Post-Patch Validation (trailofbits/skills, 7.4k stars), Patch Edit (nexu-io/open-design, 100k stars) and Patch Release Check (ClickHouse/ClickHouse, 50k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Systems Administration?

cbrock84 (a GitHub user) maintains it in cbrock84/headcount, which has 2,007 GitHub stars. The repository holds 175 skills in this directory. The repository was last updated on September 17, 2026.

Source: cbrock84/headcount on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.