Nitro don't understand [<params>] in routeRules...

Environment

Hello Nitro team :)

I'm using Nuxt 3.17.4

My nuxt.config.ts:

export default defineNuxtConfig({
  nitro: {
    routeRules: {
      'admin/**': {
        headers: {
          'x-nitro-rule': 'admin/**'
        }
      },
      '[slug]/**': {
        headers: {
          'x-nitro-rule': '[slug]/**'
        }
      }
    }
  }
})

Nuxt pages structure:

pages/
├── admin/
│   └── index.vue          // route /admin
├── [slug]/
│   └── index.vue          // route /[slug]

Reproduction

No reproduction

Describe the bug

✅ When I visit /admin route, the header x-nitro-rule with value admin/** is correctly added.

❌ But when I visit a /[slug] route like /hello, the header x-nitro-rule with value [slug]/** is not added.

It looks like Nitro’s route matching doesn’t support dynamic segments [slug] in routeRules headers.

Am I doing something wrong, or is it a bug?

Thanks for your help!

Start with the routeRules in nuxt.config.ts and compare the pages/admin/index.vue and pages/[slug]/index.vue cases described in the issue. Reproduce requests to /admin and /hello, then trace Nitro's route matching; done when the dynamic route receives the configured x-nitro-rule header consistently.