[Routes] Eliminate route collision warnings from shadowed stubs, duplicate slugs, RSS conflicts, and llms.txt dupes

[mvvmm]

What changed

Four distinct route collision sources, all fixed without URL changes or redirects:

1. Content stubs shadowing explicit src/pages routes (4 routes)

Wrapped getDocsStaticPaths in src/pages/[...slug].astro to filter out content stubs that have a corresponding explicit page:

• ai/models
• workers-ai/models
• ruleset-engine/rules-language/fields/reference
• waf/change-log/changelog

2. Duplicate changelog post slugs (1 collision)

getChangelogs() in src/util/changelog.ts strips the product folder from the ID, causing entries from different folders with the same date-filename to collide (e.g. rules/2026-04-01-l4-transport-telemetry-fields.mdx and workers/2026-04-01-l4-transport-telemetry-fields.mdx). Now prefixes later occurrences with the product folder name.

3. RSS product/group path collision (1 collision)

/changelog/rss/cloudflare-one.xml was generated by both [product].xml.ts (product ID cloudflare-one) and [area].xml.ts (group slug cloudflare-one). Fixed by making [area].xml.ts skip any group slug that matches a directory entry ID. No URL changes or redirects needed — the product feed owns the colliding URL.

4. Duplicate llms.txt static paths (3 collisions)

Four SDK directory entries (sdk, go-sdk, python-sdk, typescript-sdk) share entry.url: /fundamentals/api/reference/sdks/, causing [...product]/llms.txt.ts to emit the same static path 4 times. Now deduplicates by URL path, keeping only the first entry per URL.

Results

Metric	Before	After
Could not render route conflicts	9	0
Pages built	8,802	8,803

The Nimbus duplicate-slug informational warning (3 routes) persists — it is emitted by the framework during getDocsStaticPaths before our filter runs. The actual route conflicts are eliminated.

Checklist

• pnpm run check — 0 errors
• pnpm run build — 8,803 pages, no new warnings
• pnpm exec prettier — clean