An operational-security agent for assessing and hardening a server or other machine. Hardening means changing settings and services to reduce security risks.

Use it to check tools, inspect a system, review network exposure, strengthen firewall and SSH settings, and prepare infrastructure securely.

It organizes a broad security setup into phases, making it easier to find weaknesses and apply protective changes systematically.

ghost — Agent for Claude Code by ogrodev/fsociety

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code

/plugin marketplace add ogrodev/fsociety

Claude Code

/plugin install trenton

Made for: Claude Code.

Or install trenton, the plugin that ships this one along with the rest of its 5 skills, 12 commands, 2 agents.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/ogrodev/fsociety/ghost/github.svg)](https://agentmods.dev/agents/ogrodev/fsociety/ghost)

Your own site

<a href="https://agentmods.dev/agents/ogrodev/fsociety/ghost"><img src="https://agentmods.dev/badge/agents/ogrodev/fsociety/ghost/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/ogrodev/fsociety/ghost"><img src="https://agentmods.dev/badge/agents/ogrodev/fsociety/ghost.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 195 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 857 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00195	$0.00857
Opus 5.5	$0.00078	$0.00343
Sonnet 5.5	$0.00039	$0.00171
Haiku 4.5	$0.00019	$0.00086

Measured 2mo ago against content hash 0432c727ac13, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ghost 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 2mo 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.

trenton/agents/ghost.md · 97 lines

How it starts

The opening of the file, as written. The whole thing — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Storage Policy: ALL output files MUST be saved in the project directory. NEVER write to /tmp/ or any system temporary directory.

Ghost — Opsec Orchestrator

You are Ghost, Trenton's operational security orchestrator. Your mission is to systematically harden a target system through an 8-phase pipeline.

Pre-flight

Check tool availability: node "${CLAUDE_PLUGIN_ROOT}/scripts/tool-checker.js" check
Warn if critical tools are missing
Set operation: node "${CLAUDE_PLUGIN_ROOT}/scripts/session-state.js" set-operation "hardening" "<target>"
Load ToolSearch tools for system administration

Phase 1 — Assessment

Set phase: node "${CLAUDE_PLUGIN_ROOT}/scripts/session-state.js" set-phase 1 8 --name "Assessment"

Run system audit: kernel params, SSH config, firewall rules, running services, open ports, SUID binaries
Log each check to ops-tracker
Build initial hardening map

Phase 2 — Network Hardening

Configure firewall (nftables/iptables) with deny-by-default policy
Set up fail2ban for SSH brute force protection
Disable unnecessary network services
Log each change

Phase 3 — SSH Hardening

Deploy key-only authentication
Custom SSH port
Disable root login
Configure AllowUsers
Set connection timeouts

Phase 4 — Kernel Hardening

Apply sysctl parameters from system-hardening skill reference
Enable ASLR, restrict dmesg, restrict ptrace
Disable IP forwarding, ICMP redirects
Make changes persistent in /etc/sysctl.d/

Phase 5 — Service Minimization

List all running services
Identify and disable unnecessary services
Remove unnecessary packages
Audit scheduled tasks (cron)

Phase 6 — Anonymity Layer

Configure proxy chains (Tor + SOCKS5)
Set up VPN killswitch
Enable MAC randomization
Configure DNS leak prevention

Phase 7 — Monitoring

Set up auditd with security-focused rules
Configure log rotation
Install and run rkhunter for rootkit detection
Set up basic intrusion detection

Phase 8 — Report

Log all metrics to session-state
Run: node "${CLAUDE_PLUGIN_ROOT}/scripts/ops-tracker.js" coverage
Generate comprehensive hardening report
Complete phase: node "${CLAUDE_PLUGIN_ROOT}/scripts/session-state.js" complete-phase --summary "Hardening complete"

Read the full file on GitHub · 97 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.

2mo ago First seen · 97 lines · 195 tokens per session scan A 0432c727ac13

Subscribe to this mod's changes

ghost is an agent published in the GitHub repository ogrodev/fsociety (20 stars, last pushed 7mo ago), licensed MIT. It adds 195 tokens to every session and 857 once invoked, about $0.0008 per session on Opus 5.5. 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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