docs: Add RunsOn regional availability guidance to primary region decision #851
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…ision Expand the primary AWS region design decision with specific guidance about reference architecture component availability. Document that RunsOn depends on AWS App Runner (only available in 11 regions) and provide clear cost implications ($80/month) and alternatives for unsupported regions like us-west-1. Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
Remove suggestion to use alternative runner solution. Instead, clarify that if using an unsupported region, you'll need to connect RunsOn via Transit Gateway (recommended) or other connectivity options. Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
Benbentwo
approved these changes
Jan 22, 2026
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what
us-west-1specifically as unsupportedwhy
Teams choosing their primary AWS region need to understand that reference architecture components like RunsOn have their own regional constraints. This guidance helps prevent costly mistakes like deploying to
us-west-1and discovering App Runner isn't available, which would require expensive cross-region Transit Gateway connections.references