openghost-skill

openghost-skill is a skill for Claude Code, Codex from VAIBHAVSING/openghost. It costs 120 tokens per session (2,239 once invoked), scanned A, original, Apache-2.0.

A local tool for authorized security testing of websites, APIs, browser features, business rules, and supporting servers. It checks for security weaknesses using established web-security testing methods and records evidence.

In plain words
What is it for?
Use it for approved security assessments, checking authenticated and multi-role behavior, mapping the attack surface, and running limited automated tests.
Why use it?
It gives a bounded way to test whether an application can be misused, including by different user roles, without relying on an outside hosted service.

Skill for Claude CodeCodex

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 skills/vaibhavsing/openghost/openghost-skill
Any agent
npx skills add VAIBHAVSING/openghost --skill openghost-skill
Clone the repo
git clone --depth 1 https://github.com/VAIBHAVSING/openghost

Made for: Claude Code, Codex.

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.

agentmods badge for openghost-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/vaibhavsing/openghost/openghost-skill.svg)](https://agentmods.dev/skills/vaibhavsing/openghost/openghost-skill)
Your own site
<a href="https://agentmods.dev/skills/vaibhavsing/openghost/openghost-skill"><img src="https://agentmods.dev/badge/skills/vaibhavsing/openghost/openghost-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 120 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,239 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 $0.00120 $0.02239
Opus 5 $0.00060 $0.01120
Sonnet 5 $0.00024 $0.00448
Haiku 4.5 $0.00012 $0.00224

Measured 4d ago against content hash 41ce3d27e7d0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

openghost-skill 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 4d ago.

The scan reads SKILL.md. This mod also ships 29 executable files (scripts/check-references.py, scripts/init-engagement.sh, scripts/openghost-assess.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/openghost-skill/SKILL.md · 168 lines

How it starts

The opening of the file, as written. The whole thing — 168 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OpenGhost

Use OpenGhost for structured, evidence-backed assessments of scoped web applications and supporting server surface. The agent reasons, automates, validates in a browser, and assembles reports; OpenGhost provides Docker-backed tool execution and engagement state.

OpenGhost is fully local and open source. It has no hosted control plane, account, API key, telemetry requirement, or managed authentication service. Any optional credential is for the authorized target application only.

Runtime

  • Require Docker, bash, and host python3.
  • Run security tools only through openghost; never run offensive tooling directly on the host.
  • If an installed skill already exposes openghost, use it directly.
  • For a repo checkout, add both launchers:
    export PATH="$PWD/skills:$PWD/skills/openghost-skill:$PATH"
    
  • For a copied standalone skill package, add only the skill directory containing openghost if needed.
  • Keep generated operational data under .openghost/, normally uncommitted.

Bounded Defensive Capability

Act as a senior defensive assessment operator. Escalate from passive inventory to bounded active validation only when the scope file explicitly enables the relevant test class.

Every target, request, tool, payload, browser action, and report claim must remain inside written authorization, OPENGHOST_SCOPE, ROE, rate limits, test windows, account/data constraints, and destructive-testing allowances.

Guardrails

  1. Confirm written authorization and rules of engagement before active testing.
  2. Define allowed hosts, ports, paths, accounts, exclusions, rate limits, test windows, emergency stop, and data handling before testing.
  3. Set OPENGHOST_SCOPE; require authorization.reviewed: true; verify scope before each target, module, and tool run.
  4. Read the relevant reference before testing a vulnerability class or workflow.
  5. Use references/cognitive-framework.md: KNOW / THINK / TEST / VALIDATE.
  6. Treat scanners, scripts, and autonomous assessment output as leads until manually validated.
  7. Save exact evidence: requests, responses, tool output, screenshots, browser traces, timestamps, roles, and reproduction steps.
  8. Do not fabricate findings; separate confirmed findings from likely or draft leads.
  9. Prefer the smallest safe proof of impact; do not bulk extract data.
  10. Avoid destructive, disruptive, high-volume, lockout, broad DoS, or production-impacting checks without explicit ROE approval.
  11. Investigate safe vulnerability chains only when every step is in scope and evidence-backed.
  12. Stop and ask when authorization, scope, credentials, or risk tolerance are ambiguous.

Read the full file on GitHub · 168 lines

Files

What ships with it

59 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 4d ago First seen · 168 lines · 120 tokens per session scan A 41ce3d27e7d0

Subscribe to this mod's changes

openghost-skill is a skill published in the GitHub repository VAIBHAVSING/openghost (37 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 120 tokens to every session and 2,239 once invoked, about $0.0006 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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