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.
git clone --depth 1 https://github.com/briiirussell/cybersecurity-skillsWrote 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.
[](https://agentmods.dev/rules/briiirussell/cybersecurity-skills/osint-recon)<a href="https://agentmods.dev/rules/briiirussell/cybersecurity-skills/osint-recon"><img src="https://agentmods.dev/badge/rules/briiirussell/cybersecurity-skills/osint-recon/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.
<a href="https://agentmods.dev/rules/briiirussell/cybersecurity-skills/osint-recon"><img src="https://agentmods.dev/badge/rules/briiirussell/cybersecurity-skills/osint-recon.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00065 | $0.01011 |
| Opus 5.5 | $0.00026 | $0.00404 |
| Sonnet 5.5 | $0.00013 | $0.00202 |
| Haiku 4.5 | $0.00006 | $0.00101 |
Grade A, and why
osint-recon scanned grade A with 1 finding 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 today.
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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s "https://crt.sh/?q=%25.<domain>&output=json" | jq -r '.[].name_value' | sort -u How it starts
The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.
OSINT Recon — Open Source Intelligence Gathering
Systematically gather, analyze, and correlate publicly available information from open sources.
Cross-references: recon for the active/passive target-mapping pass against an authorized system (DNS, ports, fingerprinting) — osint-recon focuses on people, organizations, leaked data, and historical artifacts; the two pair naturally. breach-patterns for ingesting public breach intelligence into your own preemptive assessments. incident-triage if OSINT surfaces evidence the user is already compromised.
Authorization and Ethics Check
Before proceeding, confirm:
- The investigation has a legitimate purpose (threat intel, authorized assessment, CTF, defensive research)
- For an assessment of an organization, the organization (or the client that engaged you) has authorized it in writing
- You are only gathering publicly available information
- Results will not be used for harassment, stalking, or doxing
Refuse requests that target individuals for harassment or aggregate private information beyond what the objective requires.
Collection Techniques
Domain and Infrastructure OSINT
Run these to map a target's infrastructure:
whois <domain> # Registration data
dig any <domain> # DNS records
Query certificate transparency for subdomains:
curl -s "https://crt.sh/?q=%25.<domain>&output=json" | jq -r '.[].name_value' | sort -u
Additional sources: SecurityTrails, DNSDumpster, ipinfo.io, bgp.he.net, Wayback Machine, Shodan, Censys.
Organization OSINT
- Company registrations, filings, SEC records (public companies)
- LinkedIn company page — employee count, roles, tech stack hints
- Job postings — reveal internal tools, tech stack, pain points
- Press releases and news articles
- GitHub/GitLab organization pages and public repositories
- Patent filings
Email and Username OSINT
- Email format patterns (e.g., [email protected])
- HaveIBeenPwned — check for breach exposure (check only, never distribute breach data)
- PGP key servers for email discovery
- Gravatar lookups for email-to-identity correlation
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.
- today Changed · +1 lines efa35ea06ac5
- 1mo ago First seen · 122 lines · 65 tokens per session scan A 31d79165f9f0
osint-recon is a cursor rule published in the GitHub repository briiirussell/cybersecurity-skills (435 stars, last pushed today), licensed MIT. It adds 65 tokens to every session and 1,011 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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