recon asset discovery skill

[bearsyankees]

No description provided.

[greptile-apps]

Greptile Summary

This PR adds a reconnaissance skill for discovering internet-facing assets. The main changes are:

• Documents the new asset_discovery skill.
• Covers certificate transparency, TLS SANs, passive DNS, and ASN/IP enumeration.
• Adds asset consolidation, probing, prioritization, and scope guidance.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed files.
• The documented identifier matches the filename-based skill loader.
• The frontmatter naming follows the existing skill convention.

Important Files Changed

Filename	Overview
docs/advanced/skills.mdx	Adds a reconnaissance section with the correct loader-visible asset_discovery identifier.
strix/skills/reconnaissance/asset_discovery.md	Adds the asset-discovery workflow, tool guidance, specialist handoffs, and scope safeguards.

_{Reviews (1): Last reviewed commit: "Document asset discovery reconnaissance ..." | Re-trigger Greptile}