How should an agency choose between static publishing, JavaScript embed, and reverse-proxy/mirror delivery for client sites?

Choose the deployment mode based on control, crawlability, update frequency, and the client's hosting constraints.

Static output is usually the most predictable when you can write files to the client host or deployment pipeline. The final HTML lives on the client domain, can be cached normally, and does not depend on runtime API availability. The tradeoff is rebuild/deployment orchestration and keeping generated files fresh.

A JavaScript embed is easy to install where server access is limited, but critical page content should not depend exclusively on late client-side injection if search indexing is important. Use embeds more comfortably for widgets or supplemental content, or pair them with server-rendered fallbacks when possible.

Mirror/reverse-proxy delivery can serve centrally managed content under the client domain while preserving crawlable URLs. It requires reliable routing, origin validation, caching, canonical controls, and careful handling of headers/errors so the proxy does not create loops or duplicate hosts.

For each mode, test the live client URL—not just the CMS preview. Verify status code, canonical, rendered content, structured data, assets, internal links, and failure behavior if the CMS origin is unavailable.

Document the chosen mode in the client workspace and provide health checks specific to that mode.

The best mode is the one that produces stable content on the client's canonical domain with the least operational fragility their hosting environment allows.