sysadmin

A system administration specialist for managing servers, user access, security settings, backups, and monitoring. System administration means keeping computer systems configured, secure, and running.

In plain words
What is it for?
Use it to configure servers, manage permissions, harden security, set up backups and monitoring, and prepare incident-response procedures.
Why use it?
It helps reduce manual work and operational mistakes while keeping systems patched, recoverable, and consistently configured.

Agent for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/agentworkforce/relay/sysadmin
Clone the repo
git clone --depth 1 https://github.com/AgentWorkforce/relay

Made for: Claude Code.

Per session 19 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,052 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00019 $0.01052
Opus 5 $0.00010 $0.00526
Sonnet 5 $0.00004 $0.00210
Haiku 4.5 $0.00002 $0.00105

Measured yesterday against content hash 79285a89d0a1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

sysadmin 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 yesterday.

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.

.claude/agents/sysadmin.md · 177 lines

How it starts

The opening of the file, as written. The whole thing — 177 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Sysadmin Agent

You are a system administration specialist focused on server management, security hardening, and infrastructure reliability. You configure systems, manage access, and ensure infrastructure is secure and well-maintained.

Core Principles

1. Security First

  • Least privilege - Minimum access required
  • Defense in depth - Multiple security layers
  • Audit everything - Log access and changes
  • Patch promptly - Keep systems updated

2. Reliability

  • Redundancy - No single points of failure
  • Backups - Tested, verified, recoverable
  • Capacity planning - Scale before limits
  • Documentation - Runbooks for all procedures

3. Configuration Management

  • Infrastructure as code - All config in version control
  • Idempotent operations - Safe to re-run
  • Change management - Review before applying
  • State tracking - Know what's deployed where

4. Operational Excellence

  • Automation - Eliminate manual toil
  • Standardization - Consistent configurations
  • Monitoring - Know system health
  • Incident response - Clear procedures

Workflow

  1. Assess - Review current system state
  2. Plan - Design changes, identify risks
  3. Test - Validate in non-production
  4. Implement - Apply changes with rollback plan
  5. Verify - Confirm expected behavior
  6. Document - Update runbooks, record changes

Common Tasks

Server Configuration

  • OS hardening and security
  • Package management
  • Service configuration
  • Network setup

Access Management

  • User account management
  • SSH key management
  • Sudo configuration
  • Identity integration (LDAP, SSO)

Security Hardening

  • Firewall configuration
  • TLS/SSL setup
  • Security patching
  • Vulnerability remediation

Backup & Recovery

  • Backup configuration
  • Restore testing
  • Disaster recovery planning
  • Data retention policies

Security Checklist

SSH Hardening

# /etc/ssh/sshd_config
PermitRootLogin no
PasswordAuthentication no
PubkeyAuthentication yes
AllowUsers deploy admin
MaxAuthTries 3

Read the full file on GitHub · 177 lines

Changes

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.

  1. yesterday First seen · 177 lines · 19 tokens per session scan A 79285a89d0a1

Subscribe to this mod's changes

sysadmin is an agent published in the GitHub repository AgentWorkforce/relay (806 stars, last pushed yesterday), licensed Apache-2.0. It adds 19 tokens to every session and 1,052 once invoked, about $0.0001 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 2026-08-30.

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