diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7191565..be86b03 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -12,13 +12,17 @@ Thank you for helping improve the Hive Commons documentation site
 
 ## Before you open a PR
 
-From a fresh checkout, install the exact dependency set and run the same local
-validation commands used by CI:
+From a fresh checkout, install the exact dependency set and run the local
+validation commands that cover the PR gates:
 
 ```bash
 npm ci
-npm run lint
-npm run build
+npm run lint:md      # markdownlint for docs content
+npm run type-check    # TypeScript without emitting files
+npm test              # Vitest unit tests
+npm run check-links   # internal docs links
+npm run lint          # ESLint for src/
+npm run build         # production build and doc-sync scripts
 ```
 
 To preview the docs locally while editing, run:
diff --git a/src/__tests__/proxy.test.ts b/src/__tests__/proxy.test.ts
index 78957da..2ac2fa9 100644
--- a/src/__tests__/proxy.test.ts
+++ b/src/__tests__/proxy.test.ts
@@ -44,6 +44,22 @@ describe('proxy', () => {
     expect(proxy(request('/zh-TW/docs/readme')).headers.get('location')).toBe('https://docs.hivecommons.dev/docs/readme')
   })
 
+
+  it('redirects region-qualified docs locales to canonical docs paths', () => {
+    const response = proxy(request('/pt-BR/docs/hive/setup'))
+
+    expect(response.status).toBe(307)
+    expect(response.headers.get('location')).toBe('https://docs.hivecommons.dev/docs/hive/setup')
+  })
+
+  it('does not treat three-letter prefixes as localized docs URLs', () => {
+    const response = proxy(request('/abc/docs/page'))
+
+    expect(response.status).toBe(200)
+    expect(response.headers.get('x-middleware-rewrite')).toBe('https://docs.hivecommons.dev/en/abc/docs/page')
+    expect(response.headers.get('location')).toBeNull()
+  })
+
   it('keeps non-doc localized pages in the i18n middleware flow', () => {
     const response = proxy(request('/es/community'))
 
diff --git a/src/__tests__/sitemap.test.ts b/src/__tests__/sitemap.test.ts
index 393dc8a..83417a2 100644
--- a/src/__tests__/sitemap.test.ts
+++ b/src/__tests__/sitemap.test.ts
@@ -1,4 +1,6 @@
-import { describe, expect, it } from 'vitest'
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import fs from 'fs'
+import path from 'path'
 import sitemap from '../app/sitemap'
 
 const SITE_URL = 'https://docs.hivecommons.dev'
@@ -39,3 +41,68 @@ describe('sitemap', () => {
     expect(urls.some((url) => url.includes('/images/'))).toBe(false)
   })
 })
+
+
+describe('sitemap generated from fixture content', () => {
+  const realCwd = process.cwd()
+  let fixtureRoot: string | undefined
+
+  function write(relPath: string, content = '# stub\n') {
+    if (!fixtureRoot) throw new Error('fixtureRoot not initialized')
+    const full = path.join(fixtureRoot, relPath)
+    fs.mkdirSync(path.dirname(full), { recursive: true })
+    fs.writeFileSync(full, content)
+    return full
+  }
+
+  afterEach(() => {
+    vi.restoreAllMocks()
+    if (fixtureRoot) {
+      fs.rmSync(fixtureRoot, { recursive: true, force: true })
+      fixtureRoot = undefined
+    }
+  })
+
+  it('maps markdown files to routes, priorities, frequencies, and mtimes', () => {
+    fixtureRoot = fs.mkdtempSync(path.join(realCwd, '.sitemap-fixture-'))
+    const setupPath = write('docs/content/hive/guides/setup.md')
+    write('docs/content/hive/guides/advanced/scaling.mdx')
+    write('docs/content/pluk/cli/index.md')
+    vi.spyOn(process, 'cwd').mockReturnValue(fixtureRoot)
+
+    const entries = sitemap()
+    const byUrl = new Map(entries.map((entry) => [entry.url, entry]))
+
+    expect(byUrl.get(SITE_URL)?.priority).toBe(1.0)
+    expect(byUrl.get(`${SITE_URL}/en`)?.changeFrequency).toBe('monthly')
+    expect(byUrl.get(`${SITE_URL}/docs`)?.priority).toBe(0.9)
+    expect(byUrl.get(`${SITE_URL}/docs/hive`)?.priority).toBe(0.9)
+    expect(byUrl.get(`${SITE_URL}/docs/hive/guides/setup`)?.priority).toBe(0.7)
+    expect(byUrl.get(`${SITE_URL}/docs/hive/guides/setup`)?.changeFrequency).toBe('weekly')
+    expect(byUrl.get(`${SITE_URL}/docs/hive/guides/setup`)?.lastModified).toEqual(fs.statSync(setupPath).mtime)
+    expect(byUrl.has(`${SITE_URL}/docs/hive/guides/advanced/scaling`)).toBe(true)
+    expect(byUrl.has(`${SITE_URL}/docs/pluk/cli`)).toBe(true)
+    expect(byUrl.has(`${SITE_URL}/docs/pluk/cli/index`)).toBe(false)
+  })
+
+  it('omits generated routes for missing content while retaining project roots', () => {
+    fixtureRoot = fs.mkdtempSync(path.join(realCwd, '.sitemap-empty-'))
+    vi.spyOn(process, 'cwd').mockReturnValue(fixtureRoot)
+
+    const entries = sitemap()
+
+    expect(entries).toHaveLength(10)
+    expect(entries.map((entry) => entry.url)).toEqual(expect.arrayContaining([
+      SITE_URL,
+      `${SITE_URL}/en`,
+      `${SITE_URL}/docs`,
+      `${SITE_URL}/docs/hive`,
+      `${SITE_URL}/docs/hotshot`,
+      `${SITE_URL}/docs/pluk`,
+      `${SITE_URL}/docs/rationguard`,
+      `${SITE_URL}/docs/promptargs`,
+      `${SITE_URL}/docs/dibs`,
+      `${SITE_URL}/docs/spektacular`,
+    ]))
+  })
+})