Techstack Infra is an agent skill from transilienceai/communitytools. Infrastructure tech-stack identification — cloud providers, CDN/WAF, DNS services, TLS/CT, DevOps tooling, plus asset discovery (domains, subdomains, IPs).
Its SKILL.md is about 460 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `reference/patterns.md`).
It sits in DevOps & Cloud, covering Cloud networking. The repository describes itself as: Open-source Claude Code skills, agents, and slash commands for AI-powered penetration testing, bug bounty hunting, and security research. The licence is MIT.