Agent skill

Check Duplicates

Check for duplicate or similar cases. An agent skill from dandye/ai-runbooks.

Apache-2.0Auto-check passedSecurity

Install Check Duplicates

skills CLI

$ npx skills add dandye/ai-runbooks --skill check-duplicates -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install dandye/ai-runbooks check-duplicates --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/dandye/ai-runbooks.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/check-duplicates .claude/skills/check-duplicates && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "check-duplicates" agent skill from https://github.com/dandye/ai-runbooks/tree/main/skills/check-duplicates into .claude/skills/check-duplicates/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "check-duplicates", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/dandye/ai-runbooks/tree/main/skills/check-duplicates

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add dandye/ai-runbooks --skill check-duplicates -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install dandye/ai-runbooks check-duplicates --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/dandye/ai-runbooks.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/check-duplicates .agents/skills/check-duplicates && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "check-duplicates" agent skill from https://github.com/dandye/ai-runbooks/tree/main/skills/check-duplicates into .agents/skills/check-duplicates/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "check-duplicates", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add dandye/ai-runbooks --skill check-duplicates -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install dandye/ai-runbooks check-duplicates --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/dandye/ai-runbooks.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/check-duplicates .cursor/skills/check-duplicates && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "check-duplicates" agent skill from https://github.com/dandye/ai-runbooks/tree/main/skills/check-duplicates into .cursor/skills/check-duplicates/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "check-duplicates", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/dandye/ai-runbooks.git --path skills/check-duplicates

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add dandye/ai-runbooks --skill check-duplicates -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install dandye/ai-runbooks check-duplicates --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/dandye/ai-runbooks.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/check-duplicates .gemini/skills/check-duplicates && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "check-duplicates" agent skill from https://github.com/dandye/ai-runbooks/tree/main/skills/check-duplicates into .gemini/skills/check-duplicates/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "check-duplicates", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install dandye/ai-runbooks check-duplicates

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add dandye/ai-runbooks --skill check-duplicates -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/dandye/ai-runbooks.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/check-duplicates .github/skills/check-duplicates && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "check-duplicates" agent skill from https://github.com/dandye/ai-runbooks/tree/main/skills/check-duplicates into .github/skills/check-duplicates/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "check-duplicates", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add dandye/ai-runbooks --skill check-duplicates -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install dandye/ai-runbooks check-duplicates --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/dandye/ai-runbooks.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/check-duplicates .opencode/skills/check-duplicates && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "check-duplicates" agent skill from https://github.com/dandye/ai-runbooks/tree/main/skills/check-duplicates into .opencode/skills/check-duplicates/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "check-duplicates", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: check-duplicates
GitHub stars: 127
Token cost: ~480 tokens
SKILL.md length: 126 words
Files: 1
Skills in repo: 27
Repo updated: Aug 14, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

Check for duplicate or similar cases. An agent skill from dandye/ai-runbooks.

Works in 2 steps: Execute Similarity Check → Process Results
Security work in your project
SKILL.md covers Inputs, Workflow, Outputs and Usage Pattern, plus 1 more section
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Check Duplicates is an agent skill from dandye/ai-runbooks. Check for duplicate or similar cases. Use before deep analysis to avoid investigating the same incident twice. Takes a CASEID and returns list of similar cases.

Its SKILL.md is about 480 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Security. The licence is Apache-2.0.

When your agent uses it

Security work in your project

Example prompts

“/check-duplicates”

Workflow steps

2 steps, taken from the step headings in SKILL.md.

Execute Similarity Check
Process Results

What it can do on your machine

Read from SKILL.md and the folder at commit 72a6863. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Check Duplicates loads about 480 tokens when it runs. Until then it costs about 45 tokens; SKILL.md has 126 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~45
When it runs · the whole SKILL.md, loaded when a task matches: ~480

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from dandye/ai-runbooks at commit 72a6863, republished under its Apache-2.0 licence (© dandye). 126 words, ~480 tokens.

Download SKILL.mdSave it as .claude/skills/check-duplicates/SKILL.md (or your agent's skills folder).

name: check-duplicates
description: Check for duplicate or similar cases. Use before deep analysis to avoid investigating the same incident twice. Takes a CASE_ID and returns list of similar cases.
type: Skill
required_roles.soar: roles/chronicle.editor
personas: tier1-analyst, tier2-analyst, tier3-analyst
generated.by: human:dandye
generated.at: 2026-02-04T06:10:49-05:00

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

Files

Just SKILL.md in skills/check-duplicates of dandye/ai-runbooks.

Open the folder on GitHubat commit 72a6863

Compare with similar skills

Check Duplicates next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Check Duplicates compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Check Duplicates this skilldandye/ai-runbooks	127	—	~480	Automated safety check: Pass	Apache-2.0	1 mo ago
Kubernetes Network Security Auditkubeshark/kubeshark	12k	—	~7.3k	Automated safety check: Notes	Apache-2.0	2 days ago
Google Cloud PAM Helpergoogle/skills	21k	—	~3.2k	Automated safety check: Pass	Apache-2.0	today
Cyberowlaikarimhabush/cyberowl	263	—	~2.5k	Automated safety check: Pass	MIT	today
DefectDojo Vulnerability ManagementAgentSecOps/SecOpsAgentKit	220	—	~2.3k	Automated safety check: Pass	Custom licence	5 mo ago
Runtime Provisionernealbridges/VulnHunter	666	—	~1.1k	Automated safety check: Pass	Apache-2.0	2 days ago

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Questions about Check Duplicates

What does Check Duplicates do?

Check for duplicate or similar cases. An agent skill from dandye/ai-runbooks. Check Duplicates is an agent skill from dandye/ai-runbooks. Check for duplicate or similar cases.

When should I use Check Duplicates?

Check Duplicates fits situations like: security work in your project.

How do I install Check Duplicates in Claude Code?

Run `npx skills add dandye/ai-runbooks --skill check-duplicates -a claude-code`. Or copy the skill folder (skills/check-duplicates in dandye/ai-runbooks) into .claude/skills/check-duplicates in your project. Claude Code loads it when a task matches its description.

How do I install Check Duplicates in Codex?

Run `npx skills add dandye/ai-runbooks --skill check-duplicates -a codex`. Or copy the skill folder (skills/check-duplicates in dandye/ai-runbooks) into .agents/skills/check-duplicates in your project. Codex loads it when a task matches its description.

Can I use Check Duplicates in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add dandye/ai-runbooks --skill check-duplicates -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/check-duplicates, .gemini/skills/check-duplicates, .github/skills/check-duplicates and .opencode/skills/check-duplicates in your project.

What does Check Duplicates need to run?

SKILL.md names no scripts, command-line tools or credentials: Check Duplicates is instructions for the agent only.

Does Check Duplicates access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Check Duplicates safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Check Duplicates use?

Check Duplicates is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Check Duplicates use?

About 480 tokens (SKILL.md is roughly 1.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Check Duplicates?

Skills that share tags, products or a category with Check Duplicates: Kubernetes Network Security Audit (kubeshark/kubeshark, 12k stars), Google Cloud PAM Helper (google/skills, 21k stars), Cyberowlai (karimhabush/cyberowl, 263 stars) and DefectDojo Vulnerability Management (AgentSecOps/SecOpsAgentKit, 220 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Check Duplicates?

dandye (a GitHub user) maintains it in dandye/ai-runbooks, which has 127 GitHub stars. The repository holds 27 skills in this directory. The repository was last updated on August 14, 2026.

Source: dandye/ai-runbooks on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Check Duplicates

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Check Duplicates Skill

Inputs

Workflow

Step 1: Execute Similarity Check

Step 2: Process Results

Outputs

Usage Pattern

When Duplicates Are Found

Files

Compare with similar skills

Similar skills

More from dandye/ai-runbooks

Related

Questions about Check Duplicates