Individual skill

techstack-security

Security-posture and third-party SaaS identification — security headers, CSP, HSTS, email auth, security.txt, plus payments/analytics/auth/CRM/support integrations.

skills/techstack-identification/security/SKILL.md

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# Security Posture & Third-Party Tech-Stack

## Scope

Two related lenses on a target:

1. **Security posture** — HTTP security headers, Content Security Policy, HSTS, email auth (SPF/DKIM/DMARC/MTA-STS), `security.txt`, certificate practices.
2. **Third-party / SaaS detection** — payment processors, analytics, customer support, identity providers, CRM/marketing, error monitoring, A/B testing, social/communication SDKs, media CDNs.

The two are coupled: CSP `script-src` and DNS `TXT` verifications reveal third-party services, while third-party domains contribute to the overall security surface.

## Signals (input)

- HTTP response headers — security headers, CSP directives, HSTS