diff --git a/nginx.portfolio.conf.example b/nginx.portfolio.conf.example
new file mode 100644
index 0000000..ae8bdf6
--- /dev/null
+++ b/nginx.portfolio.conf.example
@@ -0,0 +1,42 @@
+# Replace every double-underscore placeholder before validation or deployment.
+# Generate the deployable file with scripts/generate-host-config.mjs; this file
+# intentionally contains no real production hostname, certificate path, or root.
+
+# Requires standard MIME mappings and static-file defaults in the parent Nginx http context.
+max_ranges 1;
+
+map $uri $portfolio_cache_control {
+  default "public, max-age=0, must-revalidate";
+  __EXACT_HASHED_ASSET_RULES__
+}
+
+server {
+  listen 80;
+  server_name __CANONICAL_HOST__ __ALTERNATE_HOSTS__;
+  return 308 https://__CANONICAL_HOST__$request_uri;
+}
+
+server {
+  listen 443 ssl;
+  server_name __CANONICAL_HOST__;
+  ssl_certificate __TLS_CERTIFICATE_PATH__;
+  ssl_certificate_key __TLS_KEY_PATH__;
+  ssl_protocols TLSv1.2 TLSv1.3;
+  root __DOCUMENT_ROOT__;
+  index index.html;
+
+  add_header Content-Security-Policy "default-src 'self'; script-src 'self' '__JSON_LD_CSP_HASH__'; style-src 'self'; img-src 'self' data:; media-src 'self'; font-src 'self'; connect-src 'none'; object-src 'none'; base-uri 'none'; frame-ancestors 'none'; form-action 'self'; upgrade-insecure-requests" always;
+  add_header X-Content-Type-Options "nosniff" always;
+  add_header Referrer-Policy "no-referrer" always;
+  add_header Permissions-Policy "camera=(), microphone=(), geolocation=(), payment=(), usb=(), accelerometer=(), gyroscope=(), magnetometer=()" always;
+  add_header X-Frame-Options "DENY" always;
+  add_header Cache-Control $portfolio_cache_control always;
+  add_header Strict-Transport-Security "max-age=31536000" always;
+
+  location = / { try_files /index.html =404; }
+  location = /index.html { try_files /index.html =404; }
+  location = /robots.txt { try_files /robots.txt =404; }
+  location = /sitemap.xml { try_files /sitemap.xml =404; }
+  location /assets/ { try_files $uri =404; }
+  location / { return 404; }
+}
diff --git a/scripts/generate-host-config.mjs b/scripts/generate-host-config.mjs
new file mode 100644
index 0000000..0b68bce
--- /dev/null
+++ b/scripts/generate-host-config.mjs
@@ -0,0 +1,259 @@
+import { readFile, writeFile } from 'node:fs/promises';
+import { isAbsolute, resolve } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { buildContentSecurityPolicy, createSecurityHeaders } from '../src/security/security-policy.ts';
+import { parseSiteConfig } from '../src/content/schemas.ts';
+
+const scriptPath = fileURLToPath(import.meta.url);
+const safeAssetPath = /^assets\/[A-Za-z0-9][A-Za-z0-9._-]*$/u;
+const sha256Pattern = /^[a-f0-9]{64}$/u;
+const safeHost = /^(?=.{1,253}$)(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\.)*[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?$/u;
+
+const exactKeys = (value, keys) => JSON.stringify(Object.keys(value).sort()) === JSON.stringify([...keys].sort());
+
+export const parseHashedArtifactManifest = (input) => {
+  if (
+    typeof input !== 'object' ||
+    input === null ||
+    Array.isArray(input) ||
+    !exactKeys(input, ['schema', 'files']) ||
+    input.schema !== 'portfolio-host-artifact-manifest/v1' ||
+    !Array.isArray(input.files)
+  ) {
+    throw new Error('Hashed artifact manifest has an invalid envelope.');
+  }
+  const files = input.files.map((record) => {
+    if (
+      typeof record !== 'object' ||
+      record === null ||
+      Array.isArray(record) ||
+      !exactKeys(record, ['path', 'sha256']) ||
+      typeof record.path !== 'string' ||
+      !safeAssetPath.test(record.path) ||
+      record.path.endsWith('.map') ||
+      typeof record.sha256 !== 'string' ||
+      !sha256Pattern.test(record.sha256)
+    ) {
+      throw new Error('Hashed artifact manifest contains an invalid file record.');
+    }
+    return { path: record.path, sha256: record.sha256 };
+  });
+  const paths = files.map(({ path }) => path);
+  if (JSON.stringify(paths) !== JSON.stringify([...new Set(paths)].sort())) {
+    throw new Error('Hashed artifact manifest files must be sorted and unique.');
+  }
+  return { schema: input.schema, files };
+};
+
+const hostManifestFromInput = (input) => {
+  if (input?.schema === 'portfolio-build-authority/v1') {
+    return parseHashedArtifactManifest({
+      schema: 'portfolio-host-artifact-manifest/v1',
+      files: input.artifactContract?.files,
+    });
+  }
+  if (input?.schema === 'portfolio-artifact-contract/v1') {
+    return parseHashedArtifactManifest({
+      schema: 'portfolio-host-artifact-manifest/v1',
+      files: input.files,
+    });
+  }
+  return parseHashedArtifactManifest(input);
+};
+
+const assertSafeAbsolutePath = (value, label) => {
+  if (typeof value !== 'string' || !isAbsolute(value) || /[\s;$`{}]/u.test(value)) {
+    throw new Error(`${label} must be an explicit safe absolute path.`);
+  }
+};
+
+const assertHost = (value, label) => {
+  if (typeof value !== 'string' || !safeHost.test(value)) throw new Error(`${label} is invalid.`);
+};
+
+const escapeNginxRegex = (value) => value.replace(/[.*+?^${}()|[\]\\]/gu, '\\$&');
+
+const renderCacheMap = (site, files) => {
+  if (site.environment === 'preview') {
+    return ['map $uri $portfolio_cache_control {', '  default "private, no-store";', '}'].join('\n');
+  }
+  return [
+    'map $uri $portfolio_cache_control {',
+    '  default "public, max-age=0, must-revalidate";',
+    ...files.map(({ path }) => `  ~^/${escapeNginxRegex(path)}$ "public, max-age=31536000, immutable";`),
+    '}',
+  ].join('\n');
+};
+
+const renderAddHeaders = (site, jsonLdCspHash, indent = '  ') => {
+  const headers = createSecurityHeaders(site, jsonLdCspHash);
+  return [
+    `${indent}add_header Content-Security-Policy "${headers.csp}" always;`,
+    `${indent}add_header X-Content-Type-Options "${headers.contentTypeOptions}" always;`,
+    `${indent}add_header Referrer-Policy "${headers.referrerPolicy}" always;`,
+    `${indent}add_header Permissions-Policy "${headers.permissionsPolicy}" always;`,
+    `${indent}add_header X-Frame-Options "${headers.frameOptions}" always;`,
+    `${indent}add_header Cache-Control $portfolio_cache_control always;`,
+    ...(headers.hsts === undefined ? [] : [`${indent}add_header Strict-Transport-Security "${headers.hsts}" always;`]),
+    ...(headers.xRobotsTag === undefined ? [] : [`${indent}add_header X-Robots-Tag "${headers.xRobotsTag}" always;`]),
+  ].join('\n');
+};
+
+const renderTls = (certificatePath, keyPath, indent = '  ') =>
+  [
+    `${indent}ssl_certificate ${certificatePath};`,
+    `${indent}ssl_certificate_key ${keyPath};`,
+    `${indent}ssl_protocols TLSv1.2 TLSv1.3;`,
+  ].join('\n');
+
+export const renderNginxConfig = (options) => {
+  const { site, jsonLdCspHash, documentRoot } = options;
+  if (
+    typeof site !== 'object' ||
+    site === null ||
+    !['preview', 'production'].includes(site.environment) ||
+    typeof site.canonicalUrl !== 'string'
+  ) {
+    throw new Error('Site config is invalid.');
+  }
+  const canonical = new URL(site.canonicalUrl);
+  if (
+    canonical.protocol !== 'https:' ||
+    canonical.username !== '' ||
+    canonical.password !== '' ||
+    canonical.pathname !== '/' ||
+    canonical.search !== '' ||
+    canonical.hash !== '' ||
+    canonical.port !== ''
+  ) {
+    throw new Error('Canonical URL must be one root HTTPS origin.');
+  }
+  assertHost(canonical.hostname, 'Canonical host');
+  assertSafeAbsolutePath(documentRoot, 'Document root');
+  const artifactManifest = parseHashedArtifactManifest(options.artifactManifest);
+  const alternateHosts = options.alternateHosts ?? [];
+  if (!Array.isArray(alternateHosts)) throw new Error('Alternate hosts must be an array.');
+  for (const host of alternateHosts) assertHost(host, 'Alternate host');
+  const sortedAlternateHosts = [...new Set(alternateHosts)].sort();
+  if (sortedAlternateHosts.length !== alternateHosts.length || sortedAlternateHosts.includes(canonical.hostname)) {
+    throw new Error('Alternate hosts must be unique and distinct from the canonical host.');
+  }
+  buildContentSecurityPolicy(jsonLdCspHash);
+
+  const production = site.environment === 'production';
+  if (production) {
+    assertSafeAbsolutePath(options.tlsCertificatePath, 'TLS certificate path');
+    assertSafeAbsolutePath(options.tlsKeyPath, 'TLS key path');
+  } else if (options.tlsCertificatePath !== undefined || options.tlsKeyPath !== undefined) {
+    throw new Error('Preview host generation does not accept production TLS material.');
+  }
+
+  const allHosts = [canonical.hostname, ...sortedAlternateHosts].join(' ');
+  const redirectTarget = `https://${canonical.hostname}$request_uri`;
+  const redirectServers = production
+    ? [
+        'server {',
+        '  listen 80;',
+        `  server_name ${allHosts};`,
+        `  return 308 ${redirectTarget};`,
+        '}',
+        ...(sortedAlternateHosts.length === 0
+          ? []
+          : [
+              '',
+              'server {',
+              '  listen 443 ssl;',
+              `  server_name ${sortedAlternateHosts.join(' ')};`,
+              renderTls(options.tlsCertificatePath, options.tlsKeyPath),
+              `  return 308 ${redirectTarget};`,
+              '}',
+            ]),
+        '',
+      ].join('\n')
+    : '';
+
+  const sitemapLocation = production
+    ? ['  location = /sitemap.xml {', '    try_files /sitemap.xml =404;', '  }'].join('\n')
+    : '';
+
+  return [
+    '# Generated by scripts/generate-host-config.mjs. Do not edit.',
+    '# Requires standard MIME mappings and static-file defaults in the parent Nginx http context.',
+    'max_ranges 1;',
+    renderCacheMap(site, artifactManifest.files),
+    '',
+    redirectServers,
+    'server {',
+    production ? '  listen 443 ssl;' : '  listen 8080;',
+    `  server_name ${canonical.hostname};`,
+    ...(production ? [renderTls(options.tlsCertificatePath, options.tlsKeyPath)] : []),
+    `  root ${documentRoot};`,
+    '  index index.html;',
+    renderAddHeaders(site, jsonLdCspHash),
+    '',
+    '  location = / {',
+    '    try_files /index.html =404;',
+    '  }',
+    '  location = /index.html {',
+    '    try_files /index.html =404;',
+    '  }',
+    '  location = /robots.txt {',
+    '    try_files /robots.txt =404;',
+    '  }',
+    ...(sitemapLocation === '' ? [] : [sitemapLocation]),
+    '  location /assets/ {',
+    '    try_files $uri =404;',
+    '  }',
+    '  location / {',
+    '    return 404;',
+    '  }',
+    '}',
+    '',
+  ]
+    .filter((line, index, all) => !(line === '' && all[index - 1] === ''))
+    .join('\n');
+};
+
+const parseArguments = (arguments_) => {
+  const values = new Map();
+  const alternateHosts = [];
+  for (let index = 0; index < arguments_.length; index += 2) {
+    const key = arguments_[index];
+    const value = arguments_[index + 1];
+    if (typeof key !== 'string' || !key.startsWith('--') || value === undefined) {
+      throw new Error('Host config arguments must be exact --name value pairs.');
+    }
+    if (key === '--alternate-host') alternateHosts.push(value);
+    else if (values.has(key)) throw new Error(`Duplicate host config argument: ${key}`);
+    else values.set(key, value);
+  }
+  const required = ['--config', '--json-ld-hash', '--artifact-manifest', '--document-root'];
+  for (const key of required) if (!values.has(key)) throw new Error(`Missing host config argument: ${key}`);
+  const allowed = new Set([...required, '--output', '--tls-certificate', '--tls-key']);
+  for (const key of values.keys()) if (!allowed.has(key)) throw new Error(`Unknown host config argument: ${key}`);
+  return { values, alternateHosts };
+};
+
+export const generateHostConfig = async (arguments_) => {
+  const { values, alternateHosts } = parseArguments(arguments_);
+  const readJson = async (path) => JSON.parse(await readFile(resolve(path), 'utf8'));
+  const site = parseSiteConfig(await readJson(values.get('--config')));
+  const artifactManifest = hostManifestFromInput(await readJson(values.get('--artifact-manifest')));
+  const config = renderNginxConfig({
+    site,
+    jsonLdCspHash: values.get('--json-ld-hash'),
+    artifactManifest,
+    documentRoot: values.get('--document-root'),
+    alternateHosts,
+    tlsCertificatePath: values.get('--tls-certificate'),
+    tlsKeyPath: values.get('--tls-key'),
+  });
+  const output = values.get('--output');
+  if (output === undefined) process.stdout.write(config);
+  else await writeFile(resolve(output), config, { flag: 'wx' });
+  return config;
+};
+
+if (process.argv[1] !== undefined && resolve(process.argv[1]) === scriptPath) {
+  await generateHostConfig(process.argv.slice(2));
+}
diff --git a/scripts/verify-artifacts.mjs b/scripts/verify-artifacts.mjs
index 2a360e0..ab6562d 100644
--- a/scripts/verify-artifacts.mjs
+++ b/scripts/verify-artifacts.mjs
@@ -311,15 +311,18 @@ const assertMetadata = (html, inputs) => {
 
 const assertSecurityHeaders = (headers, inputs, serializedJsonLd) => {
   const required = [
-    "default-src 'self'", "script-src 'self'", "style-src 'self'", "img-src 'self'", "media-src 'self'",
+    "default-src 'self'", "script-src 'self'", "style-src 'self'", "img-src 'self' data:", "media-src 'self'",
     "font-src 'self'", "connect-src 'none'", "object-src 'none'", "base-uri 'none'", "frame-ancestors 'none'",
-    "form-action 'none'", 'upgrade-insecure-requests', 'X-Content-Type-Options: nosniff',
+    "form-action 'self'", 'upgrade-insecure-requests', 'X-Content-Type-Options: nosniff',
     'Referrer-Policy: no-referrer', 'X-Frame-Options: DENY',
     'Permissions-Policy: camera=(), microphone=(), geolocation=(), payment=(), usb=(), accelerometer=(), gyroscope=(), magnetometer=()',
   ];
   for (const value of required) {
     if (!headers.includes(value)) throw new Error(`Missing security header policy: ${value}`);
   }
+  if (/unsafe-inline|unsafe-eval|(?:^|[;\s])\*(?:[;\s]|$)|https?:\/\//iu.test(headers)) {
+    throw new Error('Security header policy contains an unsafe or external source expression.');
+  }
   const expectedHash = `sha256-${createHash('sha256').update(serializedJsonLd).digest('base64')}`;
   const hashes = headers.match(/sha256-[A-Za-z0-9+/=]+/gu) ?? [];
   if (hashes.length !== 1 || hashes[0] !== expectedHash) {
diff --git a/src/content/metadata.ts b/src/content/metadata.ts
index 66c96e3..f614397 100644
--- a/src/content/metadata.ts
+++ b/src/content/metadata.ts
@@ -5,6 +5,7 @@ import type {
   SiteConfig,
 } from './types.ts';
 import { serializeJsonLd } from '../security/serialize-json-ld.ts';
+import { createSecurityHeaders } from '../security/security-policy.ts';
 
 interface PersonJsonLd {
   '@type': 'Person';
@@ -108,28 +109,19 @@ export const createPageMetadata = (
   };
 };
 
-const contentSecurityPolicy = (jsonLdCspHash: string): string => [
-  "default-src 'self'",
-  `script-src 'self' '${jsonLdCspHash}'`,
-  "style-src 'self'",
-  "img-src 'self'",
-  "media-src 'self'",
-  "font-src 'self'",
-  "connect-src 'none'",
-  "object-src 'none'",
-  "base-uri 'none'",
-  "frame-ancestors 'none'",
-  "form-action 'none'",
-  'upgrade-insecure-requests',
-].join('; ');
-
-const commonHeaders = (metadata: Readonly<PageMetadata>): string[] => [
-  `  Content-Security-Policy: ${contentSecurityPolicy(metadata.jsonLdCspHash)}`,
-  '  X-Content-Type-Options: nosniff',
-  '  Referrer-Policy: no-referrer',
-  '  Permissions-Policy: camera=(), microphone=(), geolocation=(), payment=(), usb=(), accelerometer=(), gyroscope=(), magnetometer=()',
-  '  X-Frame-Options: DENY',
-];
+const commonHeaders = (
+  metadata: Readonly<PageMetadata>,
+  site: Readonly<SiteConfig>,
+): string[] => {
+  const headers = createSecurityHeaders(site, metadata.jsonLdCspHash);
+  return [
+    `  Content-Security-Policy: ${headers.csp}`,
+    `  X-Content-Type-Options: ${headers.contentTypeOptions}`,
+    `  Referrer-Policy: ${headers.referrerPolicy}`,
+    `  Permissions-Policy: ${headers.permissionsPolicy}`,
+    `  X-Frame-Options: ${headers.frameOptions}`,
+  ];
+};
 
 export const createStaticHostArtifacts = (
   metadata: Readonly<PageMetadata>,
@@ -140,7 +132,7 @@ export const createStaticHostArtifacts = (
       robots: 'User-agent: *\nDisallow: /\n',
       headers: [
         '/*',
-        ...commonHeaders(metadata),
+        ...commonHeaders(metadata, site),
         '  Cache-Control: private, no-store',
         '  X-Robots-Tag: noindex, nofollow, noarchive',
         '',
@@ -164,7 +156,7 @@ export const createStaticHostArtifacts = (
       '  Cache-Control: public, max-age=31536000, immutable',
       '',
       '/*',
-      ...commonHeaders(metadata),
+      ...commonHeaders(metadata, site),
       '  Cache-Control: public, max-age=0, must-revalidate',
       '  Strict-Transport-Security: max-age=31536000',
       '',
diff --git a/src/security/security-policy.ts b/src/security/security-policy.ts
new file mode 100644
index 0000000..1887f65
--- /dev/null
+++ b/src/security/security-policy.ts
@@ -0,0 +1,78 @@
+import type { SiteConfig } from '../content/types.ts';
+
+export const PERMISSIONS_POLICY =
+  'camera=(), microphone=(), geolocation=(), payment=(), usb=(), accelerometer=(), gyroscope=(), magnetometer=()' as const;
+
+const jsonLdHashPattern = /^sha256-[A-Za-z0-9+/]{43}=$/u;
+
+export interface SecurityHeaderMap {
+  csp: string;
+  contentTypeOptions: 'nosniff';
+  referrerPolicy: 'no-referrer';
+  permissionsPolicy: typeof PERMISSIONS_POLICY;
+  frameOptions: 'DENY';
+  cacheControl: 'private, no-store' | 'public, max-age=0, must-revalidate';
+  hsts?: 'max-age=31536000';
+  xRobotsTag?: 'noindex, nofollow, noarchive';
+}
+
+const assertJsonLdCspHash = (value: string): void => {
+  if (!jsonLdHashPattern.test(value)) {
+    throw new Error('JSON-LD CSP hash must be one canonical SHA-256 base64 expression.');
+  }
+};
+
+export const buildContentSecurityPolicy = (jsonLdCspHash: string): string => {
+  assertJsonLdCspHash(jsonLdCspHash);
+  return [
+    "default-src 'self'",
+    `script-src 'self' '${jsonLdCspHash}'`,
+    "style-src 'self'",
+    "img-src 'self' data:",
+    "media-src 'self'",
+    "font-src 'self'",
+    "connect-src 'none'",
+    "object-src 'none'",
+    "base-uri 'none'",
+    "frame-ancestors 'none'",
+    "form-action 'self'",
+    'upgrade-insecure-requests',
+  ].join('; ');
+};
+
+export const createSecurityHeaders = (site: Readonly<SiteConfig>, jsonLdCspHash: string): SecurityHeaderMap => {
+  const common = {
+    csp: buildContentSecurityPolicy(jsonLdCspHash),
+    contentTypeOptions: 'nosniff' as const,
+    referrerPolicy: 'no-referrer' as const,
+    permissionsPolicy: PERMISSIONS_POLICY,
+    frameOptions: 'DENY' as const,
+  };
+  return site.environment === 'preview'
+    ? {
+        ...common,
+        cacheControl: 'private, no-store',
+        xRobotsTag: 'noindex, nofollow, noarchive',
+      }
+    : {
+        ...common,
+        cacheControl: 'public, max-age=0, must-revalidate',
+        hsts: 'max-age=31536000',
+      };
+};
+
+export const serializeStaticHostHeaders = (site: Readonly<SiteConfig>, jsonLdCspHash: string): string => {
+  const headers = createSecurityHeaders(site, jsonLdCspHash);
+  return [
+    '/*',
+    `  Content-Security-Policy: ${headers.csp}`,
+    `  X-Content-Type-Options: ${headers.contentTypeOptions}`,
+    `  Referrer-Policy: ${headers.referrerPolicy}`,
+    `  Permissions-Policy: ${headers.permissionsPolicy}`,
+    `  X-Frame-Options: ${headers.frameOptions}`,
+    `  Cache-Control: ${headers.cacheControl}`,
+    ...(headers.hsts === undefined ? [] : [`  Strict-Transport-Security: ${headers.hsts}`]),
+    ...(headers.xRobotsTag === undefined ? [] : [`  X-Robots-Tag: ${headers.xRobotsTag}`]),
+    '',
+  ].join('\n');
+};
diff --git a/tests/integration/nginx-config.test.ts b/tests/integration/nginx-config.test.ts
new file mode 100644
index 0000000..6421ead
--- /dev/null
+++ b/tests/integration/nginx-config.test.ts
@@ -0,0 +1,155 @@
+import { readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+import { describe, expect, it } from 'vitest';
+import type { SiteConfig } from '@/content/types';
+import {
+  parseHashedArtifactManifest,
+  renderNginxConfig,
+  // @ts-expect-error The executable ESM build script intentionally has no publishable declaration file.
+} from '../../scripts/generate-host-config.mjs';
+
+const jsonLdHash = 'sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=';
+const productionSite: SiteConfig = {
+  environment: 'production',
+  canonicalUrl: 'https://portfolio.example.test/',
+  buildId: 'release-1',
+};
+const previewSite: SiteConfig = {
+  environment: 'preview',
+  canonicalUrl: 'https://portfolio.localhost/',
+  buildId: 'preview-1',
+};
+const manifest = {
+  schema: 'portfolio-host-artifact-manifest/v1',
+  files: [
+    { path: 'assets/app-a1b2c3d4.css', sha256: 'b'.repeat(64) },
+    { path: 'assets/app-a1b2c3d4.js', sha256: 'a'.repeat(64) },
+    { path: 'assets/demo-c3d4e5f6.webm', sha256: 'c'.repeat(64) },
+  ],
+};
+
+describe('generated Nginx static-host contract', () => {
+  it('binds immutable caching to the exact hashed artifact manifest', () => {
+    const config = renderNginxConfig({
+      site: productionSite,
+      jsonLdCspHash: jsonLdHash,
+      artifactManifest: manifest,
+      documentRoot: '/srv/portfolio/current',
+      alternateHosts: ['www.portfolio.example.test'],
+      tlsCertificatePath: '/etc/portfolio/tls/fullchain.pem',
+      tlsKeyPath: '/etc/portfolio/tls/privkey.pem',
+    });
+
+    for (const file of manifest.files) expect(config).toContain(`~^/${file.path.replaceAll('.', '\\.')}$`);
+    expect(config).toContain('public, max-age=31536000, immutable');
+    expect(config).toContain('public, max-age=0, must-revalidate');
+    expect(config).toContain(
+      'Requires standard MIME mappings and static-file defaults in the parent Nginx http context.',
+    );
+    expect(config).not.toContain('include /etc/nginx/mime.types;');
+    expect(config).not.toContain('default_type application/octet-stream;');
+    expect(config).not.toContain('sendfile on;');
+    expect(config).toContain('max_ranges 1;');
+    expect(config).not.toContain('max_ranges 0');
+  });
+
+  it('redirects HTTP and an alternate HTTPS host directly to the canonical HTTPS host', () => {
+    const config = renderNginxConfig({
+      site: productionSite,
+      jsonLdCspHash: jsonLdHash,
+      artifactManifest: manifest,
+      documentRoot: '/srv/portfolio/current',
+      alternateHosts: ['www.portfolio.example.test'],
+      tlsCertificatePath: '/etc/portfolio/tls/fullchain.pem',
+      tlsKeyPath: '/etc/portfolio/tls/privkey.pem',
+    });
+
+    expect(config).toContain('listen 80;');
+    expect(config).toContain('server_name portfolio.example.test www.portfolio.example.test;');
+    expect(config.match(/return 308 https:\/\/portfolio\.example\.test\$request_uri;/gu)).toHaveLength(2);
+    expect(config).not.toMatch(/return 30[127] /u);
+    expect(config).not.toContain('http://portfolio.example.test');
+  });
+
+  it('applies exact browser headers and production indexability without public source maps', () => {
+    const config = renderNginxConfig({
+      site: productionSite,
+      jsonLdCspHash: jsonLdHash,
+      artifactManifest: manifest,
+      documentRoot: '/srv/portfolio/current',
+      alternateHosts: [],
+      tlsCertificatePath: '/etc/portfolio/tls/fullchain.pem',
+      tlsKeyPath: '/etc/portfolio/tls/privkey.pem',
+    });
+
+    expect(config).toContain("default-src 'self'; script-src 'self' 'sha256-");
+    expect(config).toContain("img-src 'self' data:");
+    expect(config).toContain("connect-src 'none'");
+    expect(config).toContain('add_header Strict-Transport-Security "max-age=31536000" always;');
+    expect(config).not.toContain('includeSubDomains');
+    expect(config).not.toContain('X-Robots-Tag');
+    expect(config).not.toMatch(/unsafe-inline|unsafe-eval|sourceMappingURL|\.map(?:\s|$)/u);
+  });
+
+  it('makes preview responses private and noindex without a sitemap or HSTS', () => {
+    const config = renderNginxConfig({
+      site: previewSite,
+      jsonLdCspHash: jsonLdHash,
+      artifactManifest: manifest,
+      documentRoot: '/srv/portfolio/preview',
+      alternateHosts: [],
+    });
+
+    expect(config).toContain('add_header X-Robots-Tag "noindex, nofollow, noarchive" always;');
+    expect(config).toContain('private, no-store');
+    expect(config).not.toContain('Strict-Transport-Security');
+    expect(config).not.toContain('sitemap.xml');
+  });
+
+  it.each([
+    {
+      name: 'a source map',
+      value: {
+        ...manifest,
+        files: [{ path: 'assets/app-a1b2c3d4.js.map', sha256: 'a'.repeat(64) }],
+      },
+    },
+    {
+      name: 'an external or unsafe path',
+      value: {
+        ...manifest,
+        files: [{ path: '../app-a1b2c3d4.js', sha256: 'a'.repeat(64) }],
+      },
+    },
+    {
+      name: 'a non-canonical digest',
+      value: {
+        ...manifest,
+        files: [{ path: 'assets/app-a1b2c3d4.js', sha256: 'A'.repeat(64) }],
+      },
+    },
+  ])('rejects $name in the hashed artifact manifest', ({ value }) => {
+    expect(() => parseHashedArtifactManifest(value)).toThrow(/artifact manifest/i);
+  });
+
+  it('rejects document-root values that cannot be emitted as one Nginx token', () => {
+    expect(() =>
+      renderNginxConfig({
+        site: previewSite,
+        jsonLdCspHash: jsonLdHash,
+        artifactManifest: manifest,
+        documentRoot: '/srv/portfolio/injected root',
+        alternateHosts: [],
+      }),
+    ).toThrow(/document root/i);
+  });
+
+  it('ships a domain-neutral example instead of inventing Luca’s production hostname', () => {
+    const example = readFileSync(resolve(process.cwd(), 'nginx.portfolio.conf.example'), 'utf8');
+
+    expect(example).toContain('__CANONICAL_HOST__');
+    expect(example).toContain('__JSON_LD_CSP_HASH__');
+    expect(example).not.toContain('portfolio.example.test');
+    expect(example).not.toMatch(/server_name\s+[a-z0-9.-]+\.[a-z]{2,}/iu);
+  });
+});
diff --git a/tests/unit/metadata.test.ts b/tests/unit/metadata.test.ts
index d3babc9..97b5c97 100644
--- a/tests/unit/metadata.test.ts
+++ b/tests/unit/metadata.test.ts
@@ -110,7 +110,7 @@ describe('environment-aware crawl and response artifacts', () => {
       '  Cache-Control: public, max-age=31536000, immutable',
       '',
       '/*',
-      `  Content-Security-Policy: default-src 'self'; script-src 'self' '${metadata.jsonLdCspHash}'; style-src 'self'; img-src 'self'; media-src 'self'; font-src 'self'; connect-src 'none'; object-src 'none'; base-uri 'none'; frame-ancestors 'none'; form-action 'none'; upgrade-insecure-requests`,
+      `  Content-Security-Policy: default-src 'self'; script-src 'self' '${metadata.jsonLdCspHash}'; style-src 'self'; img-src 'self' data:; media-src 'self'; font-src 'self'; connect-src 'none'; object-src 'none'; base-uri 'none'; frame-ancestors 'none'; form-action 'self'; upgrade-insecure-requests`,
       '  X-Content-Type-Options: nosniff',
       '  Referrer-Policy: no-referrer',
       '  Permissions-Policy: camera=(), microphone=(), geolocation=(), payment=(), usb=(), accelerometer=(), gyroscope=(), magnetometer=()',
diff --git a/tests/unit/security-policy.test.ts b/tests/unit/security-policy.test.ts
new file mode 100644
index 0000000..2b7c35a
--- /dev/null
+++ b/tests/unit/security-policy.test.ts
@@ -0,0 +1,82 @@
+import { describe, expect, it } from 'vitest';
+import {
+  buildContentSecurityPolicy,
+  createSecurityHeaders,
+  serializeStaticHostHeaders,
+} from '@/security/security-policy';
+import type { SiteConfig } from '@/content/types';
+
+const jsonLdHash = 'sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=';
+const productionSite: SiteConfig = {
+  environment: 'production',
+  canonicalUrl: 'https://portfolio.example.test/',
+  buildId: 'release-1',
+};
+const previewSite: SiteConfig = {
+  environment: 'preview',
+  canonicalUrl: 'https://portfolio.localhost/',
+  buildId: 'preview-1',
+};
+
+describe('static-host security policy', () => {
+  it('builds the exact restrictive CSP around the serialized JSON-LD hash', () => {
+    expect(buildContentSecurityPolicy(jsonLdHash)).toBe(
+      [
+        "default-src 'self'",
+        `script-src 'self' '${jsonLdHash}'`,
+        "style-src 'self'",
+        "img-src 'self' data:",
+        "media-src 'self'",
+        "font-src 'self'",
+        "connect-src 'none'",
+        "object-src 'none'",
+        "base-uri 'none'",
+        "frame-ancestors 'none'",
+        "form-action 'self'",
+        'upgrade-insecure-requests',
+      ].join('; '),
+    );
+  });
+
+  it('emits production security and revalidation headers without widening HSTS', () => {
+    const headers = createSecurityHeaders(productionSite, jsonLdHash);
+
+    expect(headers).toEqual({
+      csp: buildContentSecurityPolicy(jsonLdHash),
+      contentTypeOptions: 'nosniff',
+      referrerPolicy: 'no-referrer',
+      permissionsPolicy:
+        'camera=(), microphone=(), geolocation=(), payment=(), usb=(), accelerometer=(), gyroscope=(), magnetometer=()',
+      frameOptions: 'DENY',
+      cacheControl: 'public, max-age=0, must-revalidate',
+      hsts: 'max-age=31536000',
+    });
+    expect(headers.hsts).not.toContain('includeSubDomains');
+    expect(headers).not.toHaveProperty('xRobotsTag');
+  });
+
+  it('keeps preview responses private, noindex, and outside HSTS policy', () => {
+    const headers = createSecurityHeaders(previewSite, jsonLdHash);
+
+    expect(headers.cacheControl).toBe('private, no-store');
+    expect(headers.xRobotsTag).toBe('noindex, nofollow, noarchive');
+    expect(headers).not.toHaveProperty('hsts');
+  });
+
+  it.each([
+    "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=' 'unsafe-inline",
+    "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=' *",
+    'sha256-not-base64!',
+    "'sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA='",
+  ])('rejects an invalid or policy-injecting JSON-LD hash: %s', (value) => {
+    expect(() => buildContentSecurityPolicy(value)).toThrow(/JSON-LD CSP hash/i);
+  });
+
+  it('serializes one exact response-header template with no wildcard or external source expressions', () => {
+    const serialized = serializeStaticHostHeaders(productionSite, jsonLdHash);
+
+    expect(serialized).toContain(`Content-Security-Policy: ${buildContentSecurityPolicy(jsonLdHash)}`);
+    expect(serialized).toContain('Strict-Transport-Security: max-age=31536000');
+    expect(serialized).not.toMatch(/unsafe-inline|unsafe-eval|https?:\/\/|\*\.(?:js|css)/u);
+  });
+});