refactor: remove unused Customer.io transactional email codepath#1498
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evanjacobson wants to merge 5 commits intomainfrom
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refactor: remove unused Customer.io transactional email codepath#1498evanjacobson wants to merge 5 commits intomainfrom
evanjacobson wants to merge 5 commits intomainfrom
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Production has been on Mailgun. Removes email-customerio.ts, customerio-node dependency, EMAIL_PROVIDER config, and CIO provider option from admin email testing page. CIO user deletion in external-services.ts is preserved (different API keys, used for marketing audience cleanup).
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Code Review SummaryStatus: No Issues Found | Recommendation: Merge Files Reviewed (11 files)
Reviewed by gpt-5.4-20260305 · 528,467 tokens |
evanjacobson
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Mar 24, 2026
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most of these will be filtered out after #1356 merges
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The jest.mock for @/lib/email only provided sendOrganizationInviteEmail, but the email-testing-router (loaded transitively via the router tree) now imports subjects from @/lib/email at module level. Add the missing exports to the mock.
…-Org/cloud into improvement/remove-customerio-email
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Summary
Removes the unused Customer.io transactional email codepath. Production has been on Mailgun.
email-customerio.tsand removedcustomerio-nodedependencyEMAIL_PROVIDERconfig and routing logic —send()always uses Mailguntemplatesobject (CIO template ID mapping), madesubjectsthe single source of truthcreditsVars(removed CIO Liquid-only variables)Note:
external-services.tsCIO user deletion is preserved — it uses different API keys (CUSTOMERIO_SITE_ID/CUSTOMERIO_API_KEY) for marketing audience cleanup.Verification
npx tsc --noEmit— no type errorspnpm lint— cleanVisual Changes
Reviewer Notes
CUSTOMERIO_EMAIL_API_KEYandEMAIL_PROVIDERfrom Vercel. KeepCUSTOMERIO_SITE_IDandCUSTOMERIO_API_KEY(used byexternal-services.tsfor marketing user deletion).