Agent skill · Data & Analytics

ctf-osint

Provides open source intelligence techniques for CTF challenges. Use when gathering information from public sources, social media, geolocation, DNS records, username enumeration, reverse image search, Google dorking, Wayback Machine, Tor relays, FEC filings, or identifying unknown data like hashes and coordinates.

ljagiellogithub.com/ljagielloGitHub ↗
claude-codecodexcan modify filesMIT
Install
npx skills add ljagiello/ctf-skills --skill ctf-osint --agent claude-code

Same command for any agent — swap --agent for codex, cursor, copilot.

Facts
Files in the skill folder: 4
SKILL.md size: 9 KB
Bundled scripts: none
Allowed tools: BashReadWriteEditGlobGrepTaskWebFetchWebSearch
Requires: Requires filesystem-based agent (Claude Code or similar) with bash, Python 3, and internet access for OSINT lookups.
Path: ctf-osint/SKILL.md
Open the folder on GitHub →
Where it comes from
Stars: 2,919
Language: Python
Read our review of the source →

Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.

From the SKILL.md

# CTF OSINT Quick reference for OSINT CTF challenges. Each technique has a one-liner here; see supporting files for full details. ## Prerequisites **Python packages (all platforms):** ```bash pip install shodan Pillow ``` **Linux (apt):** ```bash apt install whois dnsutils nmap libimage-exiftool-perl imagemagick curl ``` **macOS (Homebrew):** ```bash brew install whois bind nmap exiftool imagemagi

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About this skill
What does the ctf-osint skill do?

Provides open source intelligence techniques for CTF challenges. Use when gathering information from public sources, social media, geolocation, DNS records, username enumeration, reverse image search, Google dorking, Wayback Machine, Tor relays, FEC filings, or identifying unknown data like hashes and coordinates.

How do I install it?

Run `npx skills add ljagiello/ctf-skills --skill ctf-osint --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.

Where does this skill come from?

From ljagiello/ctf-skills, a repository with 2,919 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.

Is a popular skill a good skill?

Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.

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