Passive reconnaissance against a target without sending traffic that could alert it. Load when the engagement starts, when you only know a domain/email/username, when scope is unclear, or when you need historical surface area. Covers subdomain enumeration (crt.sh, subfinder), historical archives (wayback), DNS posture (dnsrecon), email & breach surface (theharvester, holehe), and username reuse (sherlock). All commands are free and key-less.
How to install passive-osint?
francescostabile/numasec/passive-osint
$npx -y skills add francescostabile/numasec --skill passive-osintInstalls into the current project.
›Prefer a prompt? Paste this to your agent
Run `npx skills use "https://github.com/francescostabile/numasec" --skill "francescostabile/numasec/passive-osint"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/francescostabile/numasec" that are relevant to the current task. Run `npx skills add "https://github.com/francescostabile/numasec"` and select the relevant skills, then follow their instructions.
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