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tailscale-custom/.agent/skills/architecture/SKILL.md
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feat: security hardening, production roadmap, admin panel v1
Client security fixes (cmd/tailscale-tray/main.go):
- SSRF protection in Add Server dialog (validateControlURL): reject
  private/loopback/link-local/cloud-metadata IPs via DNS resolution
- RCE gate on AuthURL/BrowseToURL exec paths (validateAuthURL)
- Sanitized URL logging (sanitizeURLForLog drops query auth tokens)
- Error handling on exec.Command with user-facing showError()

Admin panel security (web-admin):
- Bcrypt password hashing (replaces SHA256)
- Rate limiting: 5 failed logins → 15-min lockout
- Session + login attempt cleanup goroutine (hourly)
- url.QueryEscape / encodeURIComponent for all API params
- Fail-hard startup when no TLS and non-loopback bind
- ADMIN_PASSWORD required (no default), password min 12 chars
- Username regex whitelist

Installer hardening (Setup.wxs):
- util:PermissionEx restricts SCM access: only Administrators +
  SYSTEM can start/stop/reconfigure service. Authenticated Users
  limited to QueryStatus/QueryConfig/Interrogate
- Vital="yes" on ServiceInstall

Docs & roadmap:
- PRODUCTION_ROADMAP.md: 5-milestone plan (security + features +
  distribution + ops) with granular tasks, effort, done-when
- CLIENT_SECURITY_AUDIT.md, SECURITY_FIXES.md, DEPLOYMENT.md
- AI assistant rules (.cursorrules, .antigravityrules, etc.)

Build & distribution:
- build-msi.ps1, deploy-and-sign.ps1, sign-release.ps1
- redeploy.ps1, tray-deploy.ps1, test-msi.ps1
- installer/msi/ alternative WXS setup
- Restored .github/workflows/ removed in mirror cleanup

.gitignore hardened: *.pfx, *.p12, *.key, *.pem, .env*
2026-04-22 15:18:11 +07:00

1.7 KiB

name, description, allowed-tools
name description allowed-tools
architecture Architectural decision-making framework. Requirements analysis, trade-off evaluation, ADR documentation. Use when making architecture decisions or analyzing system design. Read, Glob, Grep

Architecture Decision Framework

"Requirements drive architecture. Trade-offs inform decisions. ADRs capture rationale."

🎯 Selective Reading Rule

Read ONLY files relevant to the request! Check the content map, find what you need.

File Description When to Read
context-discovery.md Questions to ask, project classification Starting architecture design
trade-off-analysis.md ADR templates, trade-off framework Documenting decisions
pattern-selection.md Decision trees, anti-patterns Choosing patterns
examples.md MVP, SaaS, Enterprise examples Reference implementations
patterns-reference.md Quick lookup for patterns Pattern comparison

Skill Use For
@[skills/database-design] Database schema design
@[skills/api-patterns] API design patterns
@[skills/deployment-procedures] Deployment architecture

Core Principle

"Simplicity is the ultimate sophistication."

  • Start simple
  • Add complexity ONLY when proven necessary
  • You can always add patterns later
  • Removing complexity is MUCH harder than adding it

Validation Checklist

Before finalizing architecture:

  • Requirements clearly understood
  • Constraints identified
  • Each decision has trade-off analysis
  • Simpler alternatives considered
  • ADRs written for significant decisions
  • Team expertise matches chosen patterns