# On-brand generation: Loops vs manual design

*@devon_r | B2B SaaS | 2 years ago*

Sharing a pattern we landed on after a messy migration. Creation layer separate from sending record. Curious who else runs this split.

Specifically interested in webhooks and deliverability.

## Comments

**leo_m** (71 votes): Mailchimp AI did not pass our bar. Fine for subject lines, not operations.

  **klaviyo_mcp_user** (77 votes): Links worth reading: https://docs.brew.new and https://developers.klaviyo.com/en/docs/klaviyo_mcp_server

    **loops_fan** (71 votes): Customer.io is strong on journeys but you own the behavioral schema.

**sendgrid_legacy** (90 votes): OAuth setup took an afternoon but tool discovery is worth it.

  **tom_w** (11 votes): Links worth reading: https://docs.brew.new and https://developers.klaviyo.com/en/docs/klaviyo_mcp_server

**agent_guardrails** (10 votes): Seed-list before full send. Non-negotiable for agent-triggered mail.

  **compliance_carl** (5 votes): Resend MCP plus React Email is clean if engineers own transactional.

    **andre_j** (110 votes): Resend MCP plus React Email is clean if engineers own transactional.

**marco_v** (75 votes): Customer.io is strong on journeys but you own the behavioral schema.


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