incident-response

incident-response is a skill for Claude Code, Codex from Miosa-osa/OSA. It costs 40 tokens per session (440 once invoked), scanned A, original, Apache-2.0.

A guide for investigating suspected security breaches, preserving evidence, and building a timeline of what happened. It also covers containing the problem, recovering systems, and checking that recovery worked.

In plain words
What is it for?
It helps investigate account takeovers and suspicious host activity, plan containment and recovery, and verify the result.
Why use it?
It gives investigations a structured path from suspected compromise to verified recovery. Preserving evidence helps teams understand the incident without losing important details.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It helps investigate account takeovers and suspicious host activity, plan containment and recovery, and verify the result.

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Install with agentmods
npx agentmods add skills/miosa-osa/osa/incident-response
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.

Any agent
npx skills add Miosa-osa/OSA --skill incident-response
Clone the repo
git clone --depth 1 https://github.com/Miosa-osa/OSA

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 incident-response

README.md
[![agentmods](https://agentmods.dev/badge/skills/miosa-osa/osa/incident-response/github.svg)](https://agentmods.dev/skills/miosa-osa/osa/incident-response)
Your own site
<a href="https://agentmods.dev/skills/miosa-osa/osa/incident-response"><img src="https://agentmods.dev/badge/skills/miosa-osa/osa/incident-response/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.

agentmods 80×15 button for incident-response

Your own site · 80×15
<a href="https://agentmods.dev/skills/miosa-osa/osa/incident-response"><img src="https://agentmods.dev/badge/skills/miosa-osa/osa/incident-response.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 440 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00040 $0.00440
Opus 5.5 $0.00016 $0.00176
Sonnet 5.5 $0.00008 $0.00088
Haiku 4.5 $0.00004 $0.00044

Measured 1mo ago against content hash 3e6f607eeada, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

incident-response 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 1mo 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.

priv/skills/incident-response/SKILL.md · 39 lines

What it actually says

Incident Response

Workflow

  1. Record incident scope, time window, source systems, owner, and observed impact. Separate confirmed evidence from hypotheses.
  2. Preserve volatile observations and exported logs in a case directory; use hashes and collection timestamps. Read the acquisition example before collecting.
  3. Correlate identities, hosts and time; record clock skew and missing evidence. Do not treat an empty log as proof of no activity.
  4. Propose containment with concrete target, expected service impact and rollback. Execute changes only within the user's authorized scope; preserve recoverable access.
  5. Remove the confirmed cause, restore from validated state, rotate affected credentials where indicated, and monitor for recurrence.
  6. Verify normal service and the previously abused path; document evidence gaps and follow-up owners.

Worked example and prerequisites

Read references/workflow.md before execution. Use only registered OSA tools named in the frontmatter; command examples run through shell_execute. Check command -v for each external executable on the actual target. Optional packages, external collectors and vendor accounts are not bundled or presumed installed.

Evidence and completion

Return scope, prerequisites, exact checks, observed results, evidence paths, limitations, remediation, rollback and retest status. Mark unavailable checks as blocked or unverified. Preserve original evidence and report redacted copies where needed. Work within the authorized environment; do not silently expand to external targets.

Sources

Original OSA workflow and examples. Primary references are linked in the bundled workflow reference, so they remain available when this skill is installed separately. No third-party skill collection or rule pack is vendored.

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. 1mo ago First seen · 39 lines · 40 tokens per session scan A 3e6f607eeada

Subscribe to this mod's changes

incident-response is a skill published in the GitHub repository Miosa-osa/OSA (78 stars, last pushed 11d ago), licensed Apache-2.0. It adds 40 tokens to every session and 440 once invoked, about $0.0002 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 2026-09-15.