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docs(aws): note hcp terraform for stack migrations

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Point migrating stacks at the org-baseline checklist; leave SAM/CDK
defaults for greenfield serverless.
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Adam Moussa 2026-08-05 16:03:59 -04:00
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aws-infrastructure.md
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@ -4,7 +4,8 @@
- **SAM** is the default for new serverless stacks (Lambda + API Gateway + DynamoDB)
- **CDK** only for complex infrastructure (ECS, VPCs, multi-service compositions)
- Every deployed resource should be managed by CloudFormation
- **Migrating stacks** from mgmt into seahaven-prod / seahaven-dev use **HCP Terraform** (migrate-and-convert; do not convert in place in mgmt). The authoritative per-stack steps live in the `seahaven-org-baseline` README migration checklist (plan/apply role patterns, boundary widen, artifact packaging, cutover). Reference implementation: `afi-backup-monitor` (PLAT-56).
- Every deployed resource should be managed by IaC (CloudFormation via SAM/CDK, or HCP Terraform state for migrated stacks)
- No manually-created Lambdas, roles, or other resources outside of IaC
## Lambda Defaults