Individual skill

domain-intel

Passive recon of subdomains, SSL certs, WHOIS, and DNS.

optional-skills/research/domain-intel/SKILL.md

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Nov 9, 2026
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MIT

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# Domain Intelligence — Passive OSINT

Passive domain reconnaissance using only Python stdlib.
**Zero dependencies. Zero API keys. Works on Linux, macOS, and Windows.**

## Helper script

This skill includes `scripts/domain_intel.py` — a complete CLI tool for all domain intelligence operations.

```bash
# Subdomain discovery via Certificate Transparency logs
python SKILL_DIR/scripts/domain_intel.py subdomains example.com

# SSL certificate inspection (expiry, cipher, SANs, issuer)
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