diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..329b94b
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,25 @@
+name: CI
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: npm
+
+      - run: npm ci
+      - run: npm run build:graph
+      - run: npm test
+      - run: npm run lint:refs
+      - run: npm run build
diff --git a/astro.config.mjs b/astro.config.mjs
index 9ab0a1e..d668314 100644
--- a/astro.config.mjs
+++ b/astro.config.mjs
@@ -38,6 +38,14 @@ export default defineConfig({
     '/resilient-plural-identity': '/writeups/resilient-plural-identity/',
     '/resilient-disbursement-rails': '/writeups/resilient-disbursement-rails/',
     '/resilient-civic-participation': '/writeups/resilient-civic-participation/',
+    // Map jurisdiction filenames keep mixed case (id-OJK.md). Astro glob
+    // ids are lowercase, so inbound mixed-case URLs need a hop.
+    '/jurisdictions/id-OJK/': '/jurisdictions/id-ojk/',
+    '/jurisdictions/sg-MAS/': '/jurisdictions/sg-mas/',
+    '/jurisdictions/eu-EUDR/': '/jurisdictions/eu-eudr/',
+    '/jurisdictions/eu-MiCA/': '/jurisdictions/eu-mica/',
+    '/jurisdictions/us-SEC/': '/jurisdictions/us-sec/',
+    '/jurisdictions/de-eWpG/': '/jurisdictions/de-ewpg/',
   },
   markdown: {
     remarkPlugins: [remarkRewriteLinks, remarkApproachVariants],
diff --git a/src/components/explore/BrowseGrid.tsx b/src/components/explore/BrowseGrid.tsx
index 5883c06..d421757 100644
--- a/src/components/explore/BrowseGrid.tsx
+++ b/src/components/explore/BrowseGrid.tsx
@@ -1,6 +1,7 @@
 import { useState, useMemo } from 'react';
 import type { GraphData, GraphNode } from '../../lib/graph-types';
 import { getNodeColor, TYPE_LABELS, nodeMatchesFilters } from '../../lib/graph-layout';
+import { toContentSlug } from '../../lib/slugify';
 
 /*
  * Filterable card grid for the /explore/browse view. Light theme.
@@ -24,7 +25,7 @@ function nodeHref(node: GraphNode): string | null {
   const route = ROUTE_BY_TYPE[node.type];
   if (!route) return null;
   const prefix = node.type === 'pattern' ? 'pattern-' : node.type === 'approach' ? 'approach-' : '';
-  return `${route}${prefix}${node.slug}/`;
+  return `${route}${prefix}${toContentSlug(node.slug)}/`;
 }
 
 export function BrowseGrid({ graph }: Props) {
diff --git a/src/components/explore/DetailPanel.tsx b/src/components/explore/DetailPanel.tsx
index 57a0bf6..3dae7c3 100644
--- a/src/components/explore/DetailPanel.tsx
+++ b/src/components/explore/DetailPanel.tsx
@@ -2,6 +2,7 @@ import { useMemo } from 'react';
 import type { GraphData, GraphNode } from '../../lib/graph-types';
 import { getNodeColor, TYPE_LABELS } from '../../lib/graph-layout';
 import { renderMarkdown } from '../../lib/render';
+import { toContentSlug } from '../../lib/slugify';
 
 /*
  * Side panel that opens when a graph node is selected. Shows
@@ -29,7 +30,7 @@ function nodeHref(node: GraphNode): string | null {
   const route = ROUTE_BY_TYPE[node.type];
   if (!route) return null;
   const prefix = node.type === 'pattern' ? 'pattern-' : node.type === 'approach' ? 'approach-' : '';
-  return `${route}${prefix}${node.slug}/`;
+  return `${route}${prefix}${toContentSlug(node.slug)}/`;
 }
 
 export function DetailPanel({ node, graph, onClose, onSelectNode }: Props) {
diff --git a/src/data/faq.ts b/src/data/faq.ts
index d2bc0b2..ecce2f9 100644
--- a/src/data/faq.ts
+++ b/src/data/faq.ts
@@ -118,7 +118,7 @@ export const faqCategories: FaqCategory[] = [
           'Viewing keys and zero-knowledge proofs of compliance (proving you hold a valid KYC attestation without revealing your identity) are the primary mechanisms. The regulatory posture is: privacy is acceptable as long as compliance access exists.',
         ],
         links: [
-          { label: 'EU / MiCA', href: '/jurisdictions/eu-MiCA/' },
+          { label: 'EU / MiCA', href: '/jurisdictions/eu-mica/' },
           { label: 'Regulatory disclosure', href: '/patterns/pattern-regulatory-disclosure-keys-proofs/' },
         ],
       },
diff --git a/src/lib/related.ts b/src/lib/related.ts
index 1b06493..2b36681 100644
--- a/src/lib/related.ts
+++ b/src/lib/related.ts
@@ -13,6 +13,7 @@
  */
 
 import { getCollection } from 'astro:content';
+import { toContentSlug } from './slugify';
 
 export type RelatedKey =
   | 'useCases'
@@ -95,12 +96,13 @@ export async function resolveSlugs(
   const folder = KEY_TO_FOLDER[collection];
   const out: RelatedItem[] = [];
   for (const slug of slugs) {
-    const title = maps[collection].get(slug);
+    const id = toContentSlug(slug);
+    const title = maps[collection].get(id);
     if (!title) {
       unresolved?.push(slug);
       continue;
     }
-    out.push({ label: title, href: `/${folder}/${slug}/` });
+    out.push({ label: title, href: `/${folder}/${id}/` });
   }
   return out;
 }
@@ -175,15 +177,16 @@ export async function extractRelated(
   };
 
   function tryAdd(key: RelatedKey, slug: string): void {
-    if (key === currentCollection && slug === currentSlug) return;
-    const dedupeKey = `${key}:${slug}`;
+    const id = toContentSlug(slug);
+    if (key === currentCollection && id === currentSlug) return;
+    const dedupeKey = `${key}:${id}`;
     if (seen.has(dedupeKey)) return;
-    const title = maps[key].get(slug);
+    const title = maps[key].get(id);
     if (!title) return; // unknown slug — skip rather than render a broken link
     seen.add(dedupeKey);
     buckets[key].push({
       label: title,
-      href: `/${KEY_TO_FOLDER[key]}/${slug}/`,
+      href: `/${KEY_TO_FOLDER[key]}/${id}/`,
     });
   }
 
@@ -409,16 +412,17 @@ async function buildBackrefIndex(): Promise<RawIndex> {
     const idx: RawIndex = new Map();
 
     function record(targetKey: RelatedKey, targetSlug: string, src: Src, perSrcSeen: Set<string>): void {
+      const id = toContentSlug(targetSlug);
       // Skip self-reference
-      if (targetKey === src.key && targetSlug === src.id) return;
+      if (targetKey === src.key && id === src.id) return;
       // Skip unknown targets (slugs that don't resolve)
-      if (!maps[targetKey].has(targetSlug)) return;
+      if (!maps[targetKey].has(id)) return;
 
-      const dedupeKey = `${targetKey}:${targetSlug}`;
+      const dedupeKey = `${targetKey}:${id}`;
       if (perSrcSeen.has(dedupeKey)) return;
       perSrcSeen.add(dedupeKey);
 
-      const bucketKey: BackrefKey = `${targetKey}:${targetSlug}`;
+      const bucketKey: BackrefKey = `${targetKey}:${id}`;
       if (!idx.has(bucketKey)) idx.set(bucketKey, []);
       const sourceFolder = KEY_TO_FOLDER[src.key];
       idx.get(bucketKey)!.push({
diff --git a/src/lib/render.ts b/src/lib/render.ts
index 48200ab..d92da51 100644
--- a/src/lib/render.ts
+++ b/src/lib/render.ts
@@ -21,6 +21,7 @@ import { marked } from 'marked';
 import type { Tokens } from 'marked';
 import graphData from '../data/graph.json';
 import type { GraphData } from './graph-types';
+import { toContentSlug } from './slugify';
 
 // ─────────────────────────────────────────────────────────────────────────────
 // CONTENT_DIRS — must agree with guide/scripts/build-graph.mjs#CONTENT_DIRS.
@@ -56,7 +57,7 @@ function resolveRouteHref(href: string): string | null {
   const parts = href.split('/').filter(p => p && p !== '.' && p !== '..');
   const [dir, file] = parts;
   if (parts.length > 2 || !INDEX_ROUTES.has(dir)) return null;
-  return file ? `/${dir}/${file.replace(/\.md$/, '')}/` : `/${dir}/`;
+  return file ? `/${dir}/${toContentSlug(file.replace(/\.md$/, ''))}/` : `/${dir}/`;
 }
 
 const graph = graphData as GraphData;
@@ -128,7 +129,7 @@ function resolveMdHref(href: string): ResolvedLink | null {
     // Astro content-collection routes use the raw filename as entry.id
     // (e.g. `pattern-shielding`), so the URL keeps the prefix. The graph
     // node id keeps the historical stripped form for the exists check.
-    const routeSlug = filename.replace(/\.md$/, '');
+    const routeSlug = toContentSlug(filename.replace(/\.md$/, ''));
     candidates.push({
       route: `${cfg.route}/${routeSlug}/${suffix}`,
       exists: nodeIds.has(id),
diff --git a/src/lib/slugify.ts b/src/lib/slugify.ts
index 70c8fed..8dcc6ef 100644
--- a/src/lib/slugify.ts
+++ b/src/lib/slugify.ts
@@ -7,6 +7,15 @@
  *   "int-banking-secrecy"-> "INT·BANKING-SECRECY"
  *   "hk-crypto-licensing"-> "HK·CRYPTO-LICENSING"
  */
+/**
+ * Astro's glob loader slugifies collection ids to lowercase, so
+ * `id-OJK.md` is served at `/jurisdictions/id-ojk/`. Map filenames
+ * keep their original case; route URLs have to match `entry.id`.
+ */
+export function toContentSlug(slug: string): string {
+  return slug.toLowerCase();
+}
+
 export function jurisdictionCode(slug: string): string {
   const [region, ...rest] = slug.split('-');
   if (!region) return slug.toUpperCase();
diff --git a/src/plugins/remark-rewrite-links.ts b/src/plugins/remark-rewrite-links.ts
index 9b04ee5..6202f86 100644
--- a/src/plugins/remark-rewrite-links.ts
+++ b/src/plugins/remark-rewrite-links.ts
@@ -21,6 +21,7 @@ import { visit } from 'unist-util-visit';
 import type { Root, Link, Text } from 'mdast';
 import type { Plugin } from 'unified';
 import type { VFile } from 'vfile';
+import { toContentSlug } from '../lib/slugify';
 
 const KNOWN_COLLECTIONS = new Set([
   'use-cases',
@@ -127,7 +128,7 @@ export const remarkRewriteLinks: Plugin<[], Root> = () => {
       if (crossMatch) {
         const [, collection, slug, anchor] = crossMatch;
         if (KNOWN_COLLECTIONS.has(collection)) {
-          node.url = `/${collection}/${slug}/${anchor ?? ''}`;
+          node.url = `/${collection}/${toContentSlug(slug)}/${anchor ?? ''}`;
           return;
         }
         node.url = `${GITHUB_BLOB}/${collection}/${slug}.md${anchor ?? ''}`;
@@ -138,7 +139,7 @@ export const remarkRewriteLinks: Plugin<[], Root> = () => {
       const sameMatch = url.match(/^([^./]+)\.md(#.*)?$/);
       if (sameMatch && currentCollection) {
         const [, slug, anchor] = sameMatch;
-        node.url = `/${currentCollection}/${slug}/${anchor ?? ''}`;
+        node.url = `/${currentCollection}/${toContentSlug(slug)}/${anchor ?? ''}`;
         return;
       }
 
diff --git a/tests/render-links.test.ts b/tests/render-links.test.ts
index ebee958..ccddd4c 100644
--- a/tests/render-links.test.ts
+++ b/tests/render-links.test.ts
@@ -23,7 +23,7 @@ describe('renderMarkdown link rewriting', () => {
   });
 
   it('still rewrites .md card links', () => {
-    expect(href('[MiCA](../jurisdictions/eu-MiCA.md)')).toBe('/jurisdictions/eu-MiCA/');
+    expect(href('[MiCA](../jurisdictions/eu-MiCA.md)')).toBe('/jurisdictions/eu-mica/');
   });
 
   it('leaves absolute and external links untouched', () => {