This folder contains technical reference docs for maintainers and contributors.

• webhook-architecture.md
  • Event emission, queue processing, retries, signatures, and payload contracts
• smtp-auth-and-operations.md
  • SMTP relay auth flow, custom username behavior, TLS modes, port strategy, and troubleshooting
• inbound-email.md
  • Receiving pipeline, AWS setup (S3, SNS, receipt rule, hosted domain), limits and troubleshooting
• release-playbook.md
  • Practical release checklist from changelog prep to tags and GitHub release publication
• repository-governance.md
  • Contributor workflow, issue/PR templates, and community health files

• Keep references implementation-aware and code-grounded.
• Update docs in this folder when changing architecture or operations.
• Prefer adding "last reviewed" dates for high-churn systems.