What is check-duplicates?

A check for finding security cases that may describe the same or a similar incident. It compares a case with other cases using alert-group details and a chosen time window.

Use it before deeper analysis to find similar open or closed cases and return their case IDs and the check status.

It helps avoid investigating the same incident twice and supports closing confirmed duplicates.

check-duplicates — Skill for Claude Code and Codex by dandye

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 dandye/ai-runbooks --skill check-duplicates

Clone the repo

git clone --depth 1 https://github.com/dandye/ai-runbooks

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/dandye/ai-runbooks/check-duplicates/github.svg)](https://agentmods.dev/skills/dandye/ai-runbooks/check-duplicates)

Your own site

<a href="https://agentmods.dev/skills/dandye/ai-runbooks/check-duplicates"><img src="https://agentmods.dev/badge/skills/dandye/ai-runbooks/check-duplicates/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/skills/dandye/ai-runbooks/check-duplicates"><img src="https://agentmods.dev/badge/skills/dandye/ai-runbooks/check-duplicates.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 492 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. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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	$0.00034	$0.00492
Opus 5	$0.00017	$0.00246
Sonnet 5	$0.00007	$0.00098
Haiku 4.5	$0.00003	$0.00049

Measured 12d ago against content hash 0ef08dbee036, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

check-duplicates 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 12d 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.

skills/check-duplicates/SKILL.md · 69 lines

What it actually says

Check Duplicates Skill

Identify potentially duplicate or similar existing cases before starting deep analysis.

Inputs

CASE_ID - The ID of the current case to check
ALERT_GROUP_IDENTIFIERS - Alert group identifiers for the case
(Optional) DAYS_BACK - How many days to search back (default: 7)
(Optional) INCLUDE_OPEN - Include open cases (default: true)
(Optional) INCLUDE_CLOSED - Include closed cases (default: false)

Workflow

Step 1: Execute Similarity Check

secops-soar.siemplify_get_similar_cases(
    case_id=CASE_ID,
    alert_group_identifiers=ALERT_GROUP_IDENTIFIERS,
    days_back=DAYS_BACK,
    include_open_cases=INCLUDE_OPEN,
    include_closed_cases=INCLUDE_CLOSED
)

Step 2: Process Results

Extract the list of similar case IDs from the response.

Outputs

Output	Description
`SIMILAR_CASE_IDS`	List of case IDs identified as potentially similar/duplicate
`SIMILARITY_CHECK_STATUS`	Success/failure status of the check

Usage Pattern

1. Check duplicates BEFORE enrichment
2. If duplicates found:
   - Review similar case(s)
   - If confirmed duplicate: close as duplicate
   - If related but distinct: note correlation, continue
3. If no duplicates: proceed with analysis

When Duplicates Are Found

If SIMILAR_CASE_IDS is not empty:

Document: "Closing as duplicate of [Similar Case ID]"
Close with:
- Reason: NOT_MALICIOUS
- Root cause: Similar case is already under investigation

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.

12d ago First seen · 69 lines · 34 tokens per session scan A 0ef08dbee036

Subscribe to this mod's changes

check-duplicates is a skill published in the GitHub repository dandye/ai-runbooks (126 stars, last pushed 28d ago), licensed Apache-2.0. It adds 34 tokens to every session and 492 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 2026-08-30.

Security

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.

obra/superpowers · 21 tokens

local-ai-agents

Build local-first AI agents that run entirely on a developer workstation with Microsoft Foundry Local and Qwen function-calling models. Covers Small Language Models (SLMs), the OpenAI-compatible local endpoint, sandboxed local tools, local RAG with Chroma, local MCP servers, hybrid cloud/local routing, and the…

microsoft/ai-agents-for-beginners · 200 tokens

next-cache-components-adoption

Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces. Use when the user wants to enable, adopt, or migrate to Cache Components, flip the cacheComponents flag, work through a flood of blocking-prerender / instant validation errors, run the cache-components-instant-false codemod, or…

vercel/next.js · 95 tokens

chat-pet-sprite-creation

Use when creating or changing VS Code chat pet sprite art, sprite sheets, state animations, eye treatments, Stable/Insiders variants, or pet transitions under src/vs/workbench/contrib/chat/browser/widget/media/chatPet.

microsoft/vscode · 53 tokens

cpu-profile-analysis

Analyze V8/Chrome CPU profiles (.cpuprofile) and DevTools trace files (Trace-.json). Use when: profiling performance, investigating slow functions, comparing code paths, finding bottlenecks, analyzing timeToRequest, understanding call trees from sampling profiler data, analyzing layout/paint/rendering, investigating…

microsoft/vscode · 71 tokens

insight-error-page

Write or audit an insight-kind error page for the Next.js dev overlay. Use when creating a new errors/ .mdx page, auditing an existing one, or checking that a page matches the framework fix cards. Covers page structure, title alignment, FixCard cards with Copy prompt button, code snippets, terminology verification…

vercel/next.js · 83 tokens