contain-security-incident

contain-security-incident is a skill for Claude Code, Codex from gaelic-ghost/socket. It costs 47 tokens per session (400 once invoked), scanned A, original, Apache-2.0.

An incident-response procedure for stopping an active or credible security breach across devices, accounts, applications, cloud services, networks, or data.

In plain words
What is it for?
It is for isolating systems, disabling accounts, revoking keys or sessions, changing access rules, and verifying that the threat has been contained.
Why use it?
It helps interrupt the path causing harm while limiting disruption, preserving important evidence, and recording what changed.

Skill for Claude CodeCodex

Part of the cybersecurity-skills plugin — 31 skills shipped together

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/gaelic-ghost/socket/contain-security-incident
Any agent
npx skills add gaelic-ghost/socket --skill contain-security-incident
Clone the repo
git clone --depth 1 https://github.com/gaelic-ghost/socket

Made for: Claude Code, Codex.

Or install cybersecurity-skills, the plugin that ships this one along with the rest of its 31 skills.

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 contain-security-incident

README.md
[![agentmods](https://agentmods.dev/badge/skills/gaelic-ghost/socket/contain-security-incident.svg)](https://agentmods.dev/skills/gaelic-ghost/socket/contain-security-incident)
Your own site
<a href="https://agentmods.dev/skills/gaelic-ghost/socket/contain-security-incident"><img src="https://agentmods.dev/badge/skills/gaelic-ghost/socket/contain-security-incident.svg" alt="Measured on agentmods" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 400 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 $0.00047 $0.00400
Opus 5 $0.00023 $0.00200
Sonnet 5 $0.00009 $0.00080
Haiku 4.5 $0.00005 $0.00040

Measured yesterday against content hash 51b883c90e12, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

contain-security-incident 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.

plugins/cybersecurity-skills/skills/contain-security-incident/SKILL.md · 35 lines

What it actually says

Contain Security Incident

Overview

Interrupt the validated path of harm with the smallest effective action, then verify the containment. Do not confuse a blocked symptom with eradication or recovery.

Read references/containment-plan.md before making disruptive changes.

Workflow

  1. Confirm incident lead, authority, current scope, harm path, critical services, evidence priorities, and emergency contacts.
  2. Model containment choices.
    • Consider host/network isolation, process/service suspension, account disablement, session/token/key revocation, access-policy change, application feature disablement, route/rule changes, or provider controls.
    • Record expected harm reduction, operational impact, volatile evidence loss, dependencies, rollback, and attacker visibility.
  3. Sequence actions.
    • Address active exfiltration/destruction/safety first, then privileged access, propagation, persistence, and re-entry paths.
    • Coordinate simultaneous identity, host, application, and network actions when staggered changes would alert or strand access.
  4. Apply approved changes.
    • Record exact target, operator, time, command/control surface, result, failures, and unexpected effects.
  5. Verify containment.
    • Check that the harmful path stopped, access/session state changed, affected services remain understood, and monitoring still functions.
  6. Expand scope carefully.
    • Hunt for related indicators and access paths; update the incident record before new targets or actions.
  7. Define exit criteria.
    • State what evidence permits eradication/recovery and what temporary controls must remain.

Output

Return containment objective, options/tradeoffs, actions/results, verification, residual access, business impact, temporary controls, rollback, and next-phase criteria.

Files

What ships with it

2 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. yesterday First seen · 35 lines · 47 tokens per session scan A 51b883c90e12

Subscribe to this mod's changes

contain-security-incident is a skill published in the GitHub repository gaelic-ghost/socket (7 stars, last pushed 9d ago), licensed Apache-2.0. It adds 47 tokens to every session and 400 once invoked, about $0.0002 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 2026-09-03.

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