Bug: Hybrid prerender fails with 'component instance' error on Cloudflare Workers

[jasonwill111]

Bug Description

Astro 6 hybrid prerender fails on Cloudflare Workers with "component instance" error.

Environment

• Workers runtime: Cloudflare Workers (production)
• Framework: Astro 6 + @astrojs/cloudflare@13+
• Build: astro build with output: 'server'

Problem

Setting export const prerender = true on static pages causes 500 errors:

Error: Unexpectedly unable to find a component instance for route /[slug]

Steps to Reproduce

1. Create Astro project with output: 'server'
2. Add @astrojs/cloudflare adapter
3. Create a page with export const prerender = true
4. Deploy to Cloudflare Workers
5. Visit the prerendered page

Expected Behavior

Static HTML served from edge, reduced Workers CPU.

Actual Behavior

500 Internal Server Error on prerendered routes.

Additional Context

• Local wrangler dev works
• CI/CD build succeeds
• Production deployment fails
• Related: [v6] Hybrid prerender broken: ERR_UNSUPPORTED_ESM_URL_SCHEME with cloudflare: protocol withastro/astro#16506

[edmundhung]

Thanks for the report. Could you share a minimal reproduction repo?

The current steps don't give us enough detail to reproduce the failure. Also, when you say local wrangler dev works, could you clarify the exact local command you're running? Astro projects are usually developed with astro dev. Just want to make sure we could reproduce the problem you are seeing.

[matthewp]

If this is a bug it's in Astro and not in any of the projects in this repository.