diff --git a/www/scripts/generate-stats.js b/www/scripts/generate-stats.js
index abbac65..6bf8b7e 100644
--- a/www/scripts/generate-stats.js
+++ b/www/scripts/generate-stats.js
@@ -11,7 +11,7 @@ function countWords(text) {
 }
 
 // Count blog posts and their words
-const postsDir = path.join(root, 'src/content/posts');
+const postsDir = path.join(root, 'src/content/md');
 const posts = fs.existsSync(postsDir)
   ? fs.readdirSync(postsDir).filter(f => f.endsWith('.md'))
   : [];
diff --git a/www/src/content.config.ts b/www/src/content.config.ts
index bea154a..6268bc5 100644
--- a/www/src/content.config.ts
+++ b/www/src/content.config.ts
@@ -3,15 +3,14 @@ import { glob, file } from 'astro/loaders';
 import { z } from 'astro/zod';
 import yaml from 'js-yaml';
 
-const posts = defineCollection({
-  loader: glob({ pattern: '**/*.md', base: './src/content/posts' }),
+const md = defineCollection({
+  loader: glob({ pattern: '**/*.md', base: './src/content/md' }),
   schema: z.object({
     title: z.string(),
     date: z.coerce.date(),
     pinned: z.boolean().optional(),
     category: z.string().optional(),
     draft: z.boolean().optional(),
-    slug: z.string(),
   })
 });
 
@@ -29,4 +28,4 @@ const bookmarks = defineCollection({
   })
 });
 
-export const collections = { posts, bookmarks };
+export const collections = { md, bookmarks };
diff --git a/www/src/lib/api.ts b/www/src/lib/api.ts
new file mode 100644
index 0000000..1961a01
--- /dev/null
+++ b/www/src/lib/api.ts
@@ -0,0 +1,19 @@
+import { isAdmin } from './auth';
+
+export function jsonResponse(data: unknown, status = 200): Response {
+  return new Response(JSON.stringify(data), {
+    status,
+    headers: { 'Content-Type': 'application/json' },
+  });
+}
+
+export function errorResponse(message: string, status: number): Response {
+  return jsonResponse({ error: message }, status);
+}
+
+export function requireAdmin(session: { user?: { id?: string } } | null): Response | null {
+  if (!session?.user?.id || !isAdmin(session.user.id)) {
+    return errorResponse('Unauthorized', 403);
+  }
+  return null;
+}
diff --git a/www/src/lib/format.ts b/www/src/lib/format.ts
new file mode 100644
index 0000000..2ed9219
--- /dev/null
+++ b/www/src/lib/format.ts
@@ -0,0 +1,15 @@
+export function formatDate(date: Date): string {
+  const d = String(date.getDate()).padStart(2, '0');
+  const m = String(date.getMonth() + 1).padStart(2, '0');
+  const y = String(date.getFullYear()).slice(-2);
+  return `${d}/${m}/${y}`;
+}
+
+export function extractDomain(url: string): string {
+  try {
+    const parsed = new URL(url);
+    return parsed.hostname.replace(/^www\./, '');
+  } catch {
+    return url;
+  }
+}
diff --git a/www/src/lib/posts.ts b/www/src/lib/posts.ts
new file mode 100644
index 0000000..6ee9805
--- /dev/null
+++ b/www/src/lib/posts.ts
@@ -0,0 +1,35 @@
+import type { CollectionEntry } from 'astro:content';
+
+type Post = CollectionEntry<'md'>;
+
+export function sortPosts(posts: Post[]): Post[] {
+  return posts.slice().sort((a, b) => {
+    if (a.data.pinned && !b.data.pinned) return -1;
+    if (!a.data.pinned && b.data.pinned) return 1;
+    return b.data.date.getTime() - a.data.date.getTime();
+  });
+}
+
+export function organizePostsByCategory(posts: Post[]): {
+  grouped: Record<string, Post[]>;
+  categories: string[];
+} {
+  const grouped = posts.reduce((acc, post) => {
+    const category = post.data.category ?? 'md';
+    if (!acc[category]) acc[category] = [];
+    acc[category].push(post);
+    return acc;
+  }, {} as Record<string, Post[]>);
+
+  const categories = Object.keys(grouped).sort((a, b) => {
+    if (a === 'md') return -1;
+    if (b === 'md') return 1;
+    return a.localeCompare(b);
+  });
+
+  for (const category of categories) {
+    grouped[category] = sortPosts(grouped[category]);
+  }
+
+  return { grouped, categories };
+}
diff --git a/www/src/lib/txt.ts b/www/src/lib/txt.ts
new file mode 100644
index 0000000..c5e9afe
--- /dev/null
+++ b/www/src/lib/txt.ts
@@ -0,0 +1,53 @@
+import fs from 'node:fs';
+import path from 'node:path';
+import yaml from 'js-yaml';
+import { getGitDate } from '../utils';
+
+export interface TxtFile {
+  name: string;
+  date: Date;
+  pinned: boolean;
+}
+
+export interface TxtConfig {
+  pinned?: string[];
+}
+
+export function getTxtDir(): string {
+  return path.join(process.cwd(), 'public/txt');
+}
+
+export function loadTxtConfig(): TxtConfig {
+  const configPath = path.join(getTxtDir(), 'config.yaml');
+  return fs.existsSync(configPath)
+    ? yaml.load(fs.readFileSync(configPath, 'utf8')) as TxtConfig
+    : {};
+}
+
+export function getTxtFiles(): TxtFile[] {
+  const txtDir = getTxtDir();
+  if (!fs.existsSync(txtDir)) return [];
+
+  const config = loadTxtConfig();
+  const pinnedSet = new Set(config.pinned || []);
+
+  return fs.readdirSync(txtDir)
+    .filter(file => file.endsWith('.txt'))
+    .map(name => ({
+      name,
+      date: getGitDate(path.join(txtDir, name)),
+      pinned: pinnedSet.has(name),
+    }))
+    .sort((a, b) => {
+      if (a.pinned && !b.pinned) return -1;
+      if (!a.pinned && b.pinned) return 1;
+      return b.date.getTime() - a.date.getTime();
+    });
+}
+
+export function getTxtFileNames(): string[] {
+  const txtDir = getTxtDir();
+  if (!fs.existsSync(txtDir)) return [];
+
+  return fs.readdirSync(txtDir).filter(file => file.endsWith('.txt'));
+}
diff --git a/www/src/pages/admin.astro b/www/src/pages/admin.astro
index 50bda50..d634e79 100644
--- a/www/src/pages/admin.astro
+++ b/www/src/pages/admin.astro
@@ -5,6 +5,7 @@ import { getSession } from 'auth-astro/server';
 import { getPendingEntries, type GuestbookEntry } from '../lib/db';
 import { isAdmin } from '../lib/auth';
 import Layout from '../layouts/Layout.astro';
+import { formatDate } from '../lib/format';
 
 let session;
 try {
@@ -27,13 +28,6 @@ try {
 } catch {
   // handle error
 }
-
-function formatDate(date: Date): string {
-  const d = String(date.getDate()).padStart(2, '0');
-  const m = String(date.getMonth() + 1).padStart(2, '0');
-  const y = String(date.getFullYear()).slice(-2);
-  return `${d}/${m}/${y}`;
-}
 ---
 <Layout title="admin - guestbook" showHeader={false}>
 
diff --git a/www/src/pages/api/deploy.ts b/www/src/pages/api/deploy.ts
index 3ae85cb..57ad7ec 100644
--- a/www/src/pages/api/deploy.ts
+++ b/www/src/pages/api/deploy.ts
@@ -1,36 +1,23 @@
 import type { APIRoute } from 'astro';
 import { getSession } from 'auth-astro/server';
-import { isAdmin } from '../../lib/auth';
+import { jsonResponse, errorResponse, requireAdmin } from '../../lib/api';
 
 export const prerender = false;
 
 export const POST: APIRoute = async ({ request }) => {
   const session = await getSession(request);
-
-  if (!session?.user?.id || !isAdmin(session.user.id)) {
-    return new Response(JSON.stringify({ error: 'Unauthorized' }), {
-      status: 403,
-      headers: { 'Content-Type': 'application/json' },
-    });
-  }
+  const authError = requireAdmin(session);
+  if (authError) return authError;
 
   const hookUrl = import.meta.env.VERCEL_DEPLOY_HOOK;
   if (!hookUrl) {
-    return new Response(JSON.stringify({ error: 'Deploy hook not configured' }), {
-      status: 500,
-      headers: { 'Content-Type': 'application/json' },
-    });
+    return errorResponse('Deploy hook not configured', 500);
   }
 
   const res = await fetch(hookUrl, { method: 'POST' });
   if (!res.ok) {
-    return new Response(JSON.stringify({ error: 'Failed to trigger deploy' }), {
-      status: 502,
-      headers: { 'Content-Type': 'application/json' },
-    });
+    return errorResponse('Failed to trigger deploy', 502);
   }
 
-  return new Response(JSON.stringify({ success: true }), {
-    headers: { 'Content-Type': 'application/json' },
-  });
+  return jsonResponse({ success: true });
 };
diff --git a/www/src/pages/api/guestbook.ts b/www/src/pages/api/guestbook.ts
index 822e1d8..79a2d04 100644
--- a/www/src/pages/api/guestbook.ts
+++ b/www/src/pages/api/guestbook.ts
@@ -1,5 +1,6 @@
 import type { APIRoute } from 'astro';
 import { createEntry } from '../../lib/db';
+import { jsonResponse, errorResponse } from '../../lib/api';
 
 export const prerender = false;
 
@@ -9,22 +10,13 @@ export const POST: APIRoute = async ({ request }) => {
     const { name, message, url } = data;
 
     if (!name || !message) {
-      return new Response(JSON.stringify({ error: 'Name and message are required' }), {
-        status: 400,
-        headers: { 'Content-Type': 'application/json' },
-      });
+      return errorResponse('Name and message are required', 400);
     }
 
     await createEntry(name.slice(0, 100), message.slice(0, 500), url?.slice(0, 200) || null);
 
-    return new Response(JSON.stringify({ success: true }), {
-      status: 201,
-      headers: { 'Content-Type': 'application/json' },
-    });
-  } catch (error) {
-    return new Response(JSON.stringify({ error: 'Failed to create entry' }), {
-      status: 500,
-      headers: { 'Content-Type': 'application/json' },
-    });
+    return jsonResponse({ success: true }, 201);
+  } catch {
+    return errorResponse('Failed to create entry', 500);
   }
 };
diff --git a/www/src/pages/api/guestbook/[id].ts b/www/src/pages/api/guestbook/[id].ts
index 286987e..a8a91a6 100644
--- a/www/src/pages/api/guestbook/[id].ts
+++ b/www/src/pages/api/guestbook/[id].ts
@@ -1,54 +1,34 @@
 import type { APIRoute } from 'astro';
 import { getSession } from 'auth-astro/server';
 import { approveEntry, deleteEntry } from '../../../lib/db';
-import { isAdmin } from '../../../lib/auth';
+import { jsonResponse, errorResponse, requireAdmin } from '../../../lib/api';
 
 export const prerender = false;
 
 export const PATCH: APIRoute = async ({ params, request }) => {
   const session = await getSession(request);
-
-  if (!session?.user?.id || !isAdmin(session.user.id)) {
-    return new Response(JSON.stringify({ error: 'Unauthorized' }), {
-      status: 403,
-      headers: { 'Content-Type': 'application/json' },
-    });
-  }
+  const authError = requireAdmin(session);
+  if (authError) return authError;
 
   const id = parseInt(params.id!, 10);
   if (isNaN(id)) {
-    return new Response(JSON.stringify({ error: 'Invalid ID' }), {
-      status: 400,
-      headers: { 'Content-Type': 'application/json' },
-    });
+    return errorResponse('Invalid ID', 400);
   }
 
   await approveEntry(id);
-  return new Response(JSON.stringify({ success: true }), {
-    headers: { 'Content-Type': 'application/json' },
-  });
+  return jsonResponse({ success: true });
 };
 
 export const DELETE: APIRoute = async ({ params, request }) => {
   const session = await getSession(request);
-
-  if (!session?.user?.id || !isAdmin(session.user.id)) {
-    return new Response(JSON.stringify({ error: 'Unauthorized' }), {
-      status: 403,
-      headers: { 'Content-Type': 'application/json' },
-    });
-  }
+  const authError = requireAdmin(session);
+  if (authError) return authError;
 
   const id = parseInt(params.id!, 10);
   if (isNaN(id)) {
-    return new Response(JSON.stringify({ error: 'Invalid ID' }), {
-      status: 400,
-      headers: { 'Content-Type': 'application/json' },
-    });
+    return errorResponse('Invalid ID', 400);
   }
 
   await deleteEntry(id);
-  return new Response(JSON.stringify({ success: true }), {
-    headers: { 'Content-Type': 'application/json' },
-  });
+  return jsonResponse({ success: true });
 };
diff --git a/www/src/pages/bookmarks/index.astro b/www/src/pages/bookmarks/index.astro
index e4e5415..4c37d9f 100644
--- a/www/src/pages/bookmarks/index.astro
+++ b/www/src/pages/bookmarks/index.astro
@@ -1,26 +1,11 @@
 ---
 import { getCollection } from 'astro:content';
 import Layout from '../../layouts/Layout.astro';
+import { formatDate, extractDomain } from '../../lib/format';
 
 const bookmarksCollection = await getCollection('bookmarks');
 const bookmarks = bookmarksCollection
   .sort((a, b) => b.data.date.getTime() - a.data.date.getTime());
-
-function formatDate(date: Date): string {
-  const d = String(date.getDate()).padStart(2, '0');
-  const m = String(date.getMonth() + 1).padStart(2, '0');
-  const y = String(date.getFullYear()).slice(-2);
-  return `${d}/${m}/${y}`;
-}
-
-function extractDomain(url: string): string {
-  try {
-    const parsed = new URL(url);
-    return parsed.hostname.replace(/^www\./, '');
-  } catch {
-    return url;
-  }
-}
 ---
 <Layout title="bookmarks - lewis m.w.">
 
diff --git a/www/src/pages/draft/[slug].astro b/www/src/pages/draft/[slug].astro
index f1bdf2c..7c6b454 100644
--- a/www/src/pages/draft/[slug].astro
+++ b/www/src/pages/draft/[slug].astro
@@ -5,6 +5,8 @@ import { getSession } from 'auth-astro/server';
 import { getCollection, render } from 'astro:content';
 import { isAdmin } from '../../lib/auth';
 import Layout from '../../layouts/Layout.astro';
+import { formatDate } from '../../lib/format';
+import { getSlug } from '../../utils';
 
 let session;
 try {
@@ -22,21 +24,14 @@ if (!isAdmin(session.user?.id)) {
 }
 
 const slug = Astro.params.slug;
-const posts = await getCollection('posts', ({ data }) => data.draft === true);
-const post = posts.find(p => p.id === slug);
+const posts = await getCollection('md', ({ data }) => data.draft === true);
+const post = posts.find(p => getSlug(p.id) === slug);
 
 if (!post) {
   return new Response('Not found', { status: 404 });
 }
 
 const { Content } = await render(post);
-
-function formatDate(date: Date): string {
-  const d = String(date.getDate()).padStart(2, '0');
-  const m = String(date.getMonth() + 1).padStart(2, '0');
-  const y = String(date.getFullYear()).slice(-2);
-  return `${d}/${m}/${y}`;
-}
 ---
 <Layout title={`${post.data.title} - lewis m.w.`}>
 
diff --git a/www/src/pages/draft/index.astro b/www/src/pages/draft/index.astro
index 636c8df..611eb3b 100644
--- a/www/src/pages/draft/index.astro
+++ b/www/src/pages/draft/index.astro
@@ -5,6 +5,9 @@ import { getSession } from 'auth-astro/server';
 import { getCollection } from 'astro:content';
 import { isAdmin } from '../../lib/auth';
 import Layout from '../../layouts/Layout.astro';
+import { formatDate } from '../../lib/format';
+import { organizePostsByCategory } from '../../lib/posts';
+import { getSlug } from '../../utils';
 
 let session;
 try {
@@ -21,38 +24,8 @@ if (!isAdmin(session.user?.id)) {
   return new Response('Forbidden', { status: 403 });
 }
 
-const posts = await getCollection('posts', ({ data }) => data.draft === true);
-
-// Group by category (default: "posts")
-const grouped = posts.reduce((acc, post) => {
-  const category = post.data.category ?? 'posts';
-  if (!acc[category]) acc[category] = [];
-  acc[category].push(post);
-  return acc;
-}, {} as Record<string, typeof posts>);
-
-// Sort categories: "posts" first, then alphabetically
-const sortedCategories = Object.keys(grouped).sort((a, b) => {
-  if (a === 'posts') return -1;
-  if (b === 'posts') return 1;
-  return a.localeCompare(b);
-});
-
-// Sort posts within each category: pinned first, then by date descending
-for (const category of sortedCategories) {
-  grouped[category].sort((a, b) => {
-    if (a.data.pinned && !b.data.pinned) return -1;
-    if (!a.data.pinned && b.data.pinned) return 1;
-    return b.data.date.getTime() - a.data.date.getTime();
-  });
-}
-
-function formatDate(date: Date): string {
-  const d = String(date.getDate()).padStart(2, '0');
-  const m = String(date.getMonth() + 1).padStart(2, '0');
-  const y = String(date.getFullYear()).slice(-2);
-  return `${d}/${m}/${y}`;
-}
+const posts = await getCollection('md', ({ data }) => data.draft === true);
+const { grouped, categories: sortedCategories } = organizePostsByCategory(posts);
 ---
 <Layout title="drafts - lewis m.w.">
 
@@ -64,7 +37,7 @@ function formatDate(date: Date): string {
   sortedCategories.map(category => (
     <details open>
       <summary>{category}</summary>
-      <pre set:html={grouped[category].map(post => `<span class="muted">${formatDate(post.data.date)}</span>    <a href="/draft/${post.id}">${post.data.title}</a>${post.data.pinned ? ' [pinned]' : ''}`).join('\n')} />
+      <pre set:html={grouped[category].map(post => `<span class="muted">${formatDate(post.data.date)}</span>    <a href="/draft/${getSlug(post.id)}">${post.data.title}</a>${post.data.pinned ? ' [pinned]' : ''}`).join('\n')} />
     </details>
   ))
 )}
diff --git a/www/src/pages/feed.xml.ts b/www/src/pages/feed.xml.ts
index 1f8b258..a95b65a 100644
--- a/www/src/pages/feed.xml.ts
+++ b/www/src/pages/feed.xml.ts
@@ -1,34 +1,19 @@
 import rss from '@astrojs/rss';
 import { getCollection } from 'astro:content';
-import fs from 'node:fs';
-import path from 'node:path';
 import type { APIContext } from 'astro';
-import { getGitDate } from '../utils';
-
-interface TxtFile {
-  name: string;
-  date: Date;
-}
+import { getTxtFiles } from '../lib/txt';
+import { getSlug } from '../utils';
 
 export async function GET(context: APIContext) {
-  const posts = await getCollection('posts', ({ data }) => data.draft !== true);
+  const posts = await getCollection('md', ({ data }) => data.draft !== true);
   const bookmarks = await getCollection('bookmarks');
-
-  const txtDir = path.join(process.cwd(), 'public/txt');
-  const txtFiles: TxtFile[] = fs.existsSync(txtDir)
-    ? fs.readdirSync(txtDir)
-        .filter(file => file.endsWith('.txt'))
-        .map(name => ({
-          name,
-          date: getGitDate(path.join(txtDir, name)),
-        }))
-    : [];
+  const txtFiles = getTxtFiles();
 
   const items = [
     ...posts.map(post => ({
       title: post.data.title,
       pubDate: post.data.date,
-      link: `/md/${post.id}`,
+      link: `/md/${getSlug(post.id)}`,
       description: post.data.title,
     })),
     ...txtFiles.map(txt => ({
diff --git a/www/src/pages/guestbook/index.astro b/www/src/pages/guestbook/index.astro
index e5c1c62..5e33851 100644
--- a/www/src/pages/guestbook/index.astro
+++ b/www/src/pages/guestbook/index.astro
@@ -1,6 +1,7 @@
 ---
 import Layout from '../../layouts/Layout.astro';
 import { getApprovedEntries, type GuestbookEntry } from '../../lib/db';
+import { formatDate } from '../../lib/format';
 
 let guestbookEntries: GuestbookEntry[] = [];
 try {
@@ -8,13 +9,6 @@ try {
 } catch {
   // DB not available during dev without env vars
 }
-
-function formatDate(date: Date): string {
-  const d = String(date.getDate()).padStart(2, '0');
-  const m = String(date.getMonth() + 1).padStart(2, '0');
-  const y = String(date.getFullYear()).slice(-2);
-  return `${d}/${m}/${y}`;
-}
 ---
 <Layout title="guestbook - lewis m.w.">
 
diff --git a/www/src/pages/index.astro b/www/src/pages/index.astro
index cd27787..fa25f03 100644
--- a/www/src/pages/index.astro
+++ b/www/src/pages/index.astro
@@ -1,73 +1,20 @@
 ---
 import { getCollection } from 'astro:content';
 import Layout from '../layouts/Layout.astro';
-import yaml from 'js-yaml';
-import fs from 'node:fs';
-import path from 'node:path';
 import { getApprovedEntries, type GuestbookEntry } from '../lib/db';
-import { getGitDate } from '../utils';
+import { formatDate, extractDomain } from '../lib/format';
+import { organizePostsByCategory } from '../lib/posts';
+import { getTxtFiles } from '../lib/txt';
+import { getSlug } from '../utils';
 
-interface TxtFile {
-  name: string;
-  date: Date;
-  pinned: boolean;
-}
-
-interface TxtConfig {
-  pinned?: string[];
-}
-
-const posts = await getCollection('posts', ({ data }) => data.draft !== true);
-
-// Group by category (default: "posts")
-const grouped = posts.reduce((acc, post) => {
-  const category = post.data.category ?? 'posts';
-  if (!acc[category]) acc[category] = [];
-  acc[category].push(post);
-  return acc;
-}, {} as Record<string, typeof posts>);
-
-// Sort categories: "posts" first, then alphabetically
-const sortedCategories = Object.keys(grouped).sort((a, b) => {
-  if (a === 'posts') return -1;
-  if (b === 'posts') return 1;
-  return a.localeCompare(b);
-});
-
-// Sort posts within each category: pinned first, then by date descending
-for (const category of sortedCategories) {
-  grouped[category].sort((a, b) => {
-    if (a.data.pinned && !b.data.pinned) return -1;
-    if (!a.data.pinned && b.data.pinned) return 1;
-    return b.data.date.getTime() - a.data.date.getTime();
-  });
-}
+const posts = await getCollection('md', ({ data }) => data.draft !== true);
+const { grouped, categories: sortedCategories } = organizePostsByCategory(posts);
 
 const bookmarksCollection = await getCollection('bookmarks');
 const bookmarks = bookmarksCollection
   .sort((a, b) => b.data.date.getTime() - a.data.date.getTime());
 
-// Auto-discover txt files from public/txt/
-const txtDir = path.join(process.cwd(), 'public/txt');
-const txtConfigPath = path.join(txtDir, 'config.yaml');
-const txtConfig: TxtConfig = fs.existsSync(txtConfigPath)
-  ? yaml.load(fs.readFileSync(txtConfigPath, 'utf8')) as TxtConfig
-  : {};
-const pinnedSet = new Set(txtConfig.pinned || []);
-
-const txtFiles: TxtFile[] = fs.existsSync(txtDir)
-  ? fs.readdirSync(txtDir)
-      .filter(file => file.endsWith('.txt'))
-      .map(name => {
-        const filePath = path.join(txtDir, name);
-        return { name, date: getGitDate(filePath), pinned: pinnedSet.has(name) };
-      })
-      .sort((a, b) => {
-        if (a.pinned && !b.pinned) return -1;
-        if (!a.pinned && b.pinned) return 1;
-        return b.date.getTime() - a.date.getTime();
-      })
-  : [];
+const txtFiles = getTxtFiles();
 
 let guestbookEntries: GuestbookEntry[] = [];
 try {
@@ -75,22 +22,6 @@ try {
 } catch {
   // DB not available during dev without env vars
 }
-
-function formatDate(date: Date): string {
-  const d = String(date.getDate()).padStart(2, '0');
-  const m = String(date.getMonth() + 1).padStart(2, '0');
-  const y = String(date.getFullYear()).slice(-2);
-  return `${d}/${m}/${y}`;
-}
-
-function extractDomain(url: string): string {
-  try {
-    const parsed = new URL(url);
-    return parsed.hostname.replace(/^www\./, '');
-  } catch {
-    return url;
-  }
-}
 ---
 <Layout title="lewis m.w." isHome>
 
@@ -100,7 +31,7 @@ function extractDomain(url: string): string {
 <details open>
   <summary>{category}</summary>
 <pre set:html={[
-  ...categoryPosts.slice(0, 10).map(post => `<span class="muted">${formatDate(post.data.date)}</span>    <a href="/md/${post.id}">${post.data.title}</a>${post.data.pinned ? ' [pinned]' : ''}`),
+  ...categoryPosts.slice(0, 10).map(post => `<span class="muted">${formatDate(post.data.date)}</span>    <a href="/md/${getSlug(post.id)}">${post.data.title}</a>${post.data.pinned ? ' [pinned]' : ''}`),
   ...(categoryPosts.length > 10 ? [`<a href="/md/">+${categoryPosts.length - 10} more</a>`] : [])
 ].join('\n')} />
 </details>
diff --git a/www/src/pages/md/[slug].astro b/www/src/pages/md/[slug].astro
index af1d28c..82c8db5 100644
--- a/www/src/pages/md/[slug].astro
+++ b/www/src/pages/md/[slug].astro
@@ -1,24 +1,19 @@
 ---
 import { getCollection, render } from 'astro:content';
 import Layout from '../../layouts/Layout.astro';
+import { formatDate } from '../../lib/format';
+import { getSlug } from '../../utils';
 
 export async function getStaticPaths() {
-  const posts = await getCollection('posts', ({ data }) => data.draft !== true);
+  const posts = await getCollection('md', ({ data }) => data.draft !== true);
   return posts.map(post => ({
-    params: { slug: post.data.slug },
+    params: { slug: getSlug(post.id) },
     props: { post }
   }));
 }
 
 const { post } = Astro.props;
 const { Content } = await render(post);
-
-function formatDate(date: Date): string {
-  const d = String(date.getDate()).padStart(2, '0');
-  const m = String(date.getMonth() + 1).padStart(2, '0');
-  const y = String(date.getFullYear()).slice(-2);
-  return `${d}/${m}/${y}`;
-}
 ---
 <Layout title={`${post.data.title} - lewis m.w.`}>
 
diff --git a/www/src/pages/md/index.astro b/www/src/pages/md/index.astro
index 269eb22..9cd469b 100644
--- a/www/src/pages/md/index.astro
+++ b/www/src/pages/md/index.astro
@@ -1,46 +1,19 @@
 ---
 import { getCollection } from 'astro:content';
 import Layout from '../../layouts/Layout.astro';
+import { formatDate } from '../../lib/format';
+import { organizePostsByCategory } from '../../lib/posts';
+import { getSlug } from '../../utils';
 
-const posts = await getCollection('posts', ({ data }) => data.draft !== true);
-
-// Group by category (default: "posts")
-const grouped = posts.reduce((acc, post) => {
-  const category = post.data.category ?? 'posts';
-  if (!acc[category]) acc[category] = [];
-  acc[category].push(post);
-  return acc;
-}, {} as Record<string, typeof posts>);
-
-// Sort categories: "posts" first, then alphabetically
-const sortedCategories = Object.keys(grouped).sort((a, b) => {
-  if (a === 'posts') return -1;
-  if (b === 'posts') return 1;
-  return a.localeCompare(b);
-});
-
-// Sort posts within each category: pinned first, then by date descending
-for (const category of sortedCategories) {
-  grouped[category].sort((a, b) => {
-    if (a.data.pinned && !b.data.pinned) return -1;
-    if (!a.data.pinned && b.data.pinned) return 1;
-    return b.data.date.getTime() - a.data.date.getTime();
-  });
-}
-
-function formatDate(date: Date): string {
-  const d = String(date.getDate()).padStart(2, '0');
-  const m = String(date.getMonth() + 1).padStart(2, '0');
-  const y = String(date.getFullYear()).slice(-2);
-  return `${d}/${m}/${y}`;
-}
+const posts = await getCollection('md', ({ data }) => data.draft !== true);
+const { grouped, categories: sortedCategories } = organizePostsByCategory(posts);
 ---
 <Layout title="md - lewis m.w.">
 
 {sortedCategories.map(category => (
 <details open>
   <summary>{category}</summary>
-<pre set:html={grouped[category].map(post => `<span class="muted">${formatDate(post.data.date)}</span>    <a href="/md/${post.data.slug}">${post.data.title}</a>${post.data.pinned ? ' [pinned]' : ''}`).join('\n')} />
+<pre set:html={grouped[category].map(post => `<span class="muted">${formatDate(post.data.date)}</span>    <a href="/md/${getSlug(post.id)}">${post.data.title}</a>${post.data.pinned ? ' [pinned]' : ''}`).join('\n')} />
 </details>
 ))}
 </Layout>
diff --git a/www/src/pages/random.ts b/www/src/pages/random.ts
index dea64e9..2cce017 100644
--- a/www/src/pages/random.ts
+++ b/www/src/pages/random.ts
@@ -1,22 +1,18 @@
 import { getCollection } from 'astro:content';
-import fs from 'node:fs';
-import path from 'node:path';
 import type { APIContext } from 'astro';
+import { getTxtFileNames } from '../lib/txt';
+import { getSlug } from '../utils';
 
 export const prerender = false;
 
 export async function GET(context: APIContext) {
   const site = context.site?.origin ?? 'https://wynne.rs';
-  const posts = await getCollection('posts', ({ data }) => data.draft !== true);
+  const posts = await getCollection('md', ({ data }) => data.draft !== true);
   const bookmarks = await getCollection('bookmarks');
-
-  const txtDir = path.join(process.cwd(), 'public/txt');
-  const txtFiles = fs.existsSync(txtDir)
-    ? fs.readdirSync(txtDir).filter(file => file.endsWith('.txt'))
-    : [];
+  const txtFiles = getTxtFileNames();
 
   const urls = [
-    ...posts.map(post => `/md/${post.id}`),
+    ...posts.map(post => `/md/${getSlug(post.id)}`),
     ...txtFiles.map(txt => `/txt/${txt}`),
     ...bookmarks.map(b => b.data.url),
   ];
diff --git a/www/src/pages/sitemap.txt.ts b/www/src/pages/sitemap.txt.ts
index 921e6c8..cf3f8ef 100644
--- a/www/src/pages/sitemap.txt.ts
+++ b/www/src/pages/sitemap.txt.ts
@@ -1,7 +1,7 @@
 import { getCollection } from 'astro:content';
-import fs from 'node:fs';
-import path from 'node:path';
 import type { APIContext } from 'astro';
+import { getTxtFileNames } from '../lib/txt';
+import { getSlug } from '../utils';
 
 const SUBDOMAINS = [
   'https://penfield.wynne.rs/',
@@ -9,17 +9,13 @@ const SUBDOMAINS = [
 
 export async function GET(context: APIContext) {
   const site = context.site?.origin ?? 'https://wynne.rs';
-  const posts = await getCollection('posts', ({ data }) => data.draft !== true);
-
-  const txtDir = path.join(process.cwd(), 'public/txt');
-  const txtFiles = fs.existsSync(txtDir)
-    ? fs.readdirSync(txtDir).filter(file => file.endsWith('.txt'))
-    : [];
+  const posts = await getCollection('md', ({ data }) => data.draft !== true);
+  const txtFiles = getTxtFileNames();
 
   const urls = [
     '/',
     '/md',
-    ...posts.map(post => `/md/${post.id}`),
+    ...posts.map(post => `/md/${getSlug(post.id)}`),
     '/txt',
     ...txtFiles.map(txt => `/txt/${txt}`),
     '/bookmarks',
diff --git a/www/src/pages/txt/index.astro b/www/src/pages/txt/index.astro
index c1bdc40..42d655c 100644
--- a/www/src/pages/txt/index.astro
+++ b/www/src/pages/txt/index.astro
@@ -1,47 +1,9 @@
 ---
 import Layout from '../../layouts/Layout.astro';
-import fs from 'node:fs';
-import path from 'node:path';
-import yaml from 'js-yaml';
-import { getGitDate } from '../../utils';
+import { formatDate } from '../../lib/format';
+import { getTxtFiles } from '../../lib/txt';
 
-interface TxtFile {
-  name: string;
-  date: Date;
-  pinned: boolean;
-}
-
-interface TxtConfig {
-  pinned?: string[];
-}
-
-const txtDir = path.join(process.cwd(), 'public/txt');
-const configPath = path.join(txtDir, 'config.yaml');
-const config: TxtConfig = fs.existsSync(configPath)
-  ? yaml.load(fs.readFileSync(configPath, 'utf8')) as TxtConfig
-  : {};
-const pinnedSet = new Set(config.pinned || []);
-
-const txtFiles: TxtFile[] = fs.existsSync(txtDir)
-  ? fs.readdirSync(txtDir)
-      .filter(file => file.endsWith('.txt'))
-      .map(name => {
-        const filePath = path.join(txtDir, name);
-        return { name, date: getGitDate(filePath), pinned: pinnedSet.has(name) };
-      })
-      .sort((a, b) => {
-        if (a.pinned && !b.pinned) return -1;
-        if (!a.pinned && b.pinned) return 1;
-        return b.date.getTime() - a.date.getTime();
-      })
-  : [];
-
-function formatDate(date: Date): string {
-  const d = String(date.getDate()).padStart(2, '0');
-  const m = String(date.getMonth() + 1).padStart(2, '0');
-  const y = String(date.getFullYear()).slice(-2);
-  return `${d}/${m}/${y}`;
-}
+const txtFiles = getTxtFiles();
 ---
 <Layout title="txt - lewis m.w.">
 
diff --git a/www/src/utils.ts b/www/src/utils.ts
index 8f61965..f0a6e20 100644
--- a/www/src/utils.ts
+++ b/www/src/utils.ts
@@ -1,5 +1,10 @@
 import { execSync } from 'node:child_process';
 
+export function getSlug(postId: string): string {
+  const parts = postId.split('/');
+  return parts[parts.length - 1];
+}
+
 export function getGitDate(filePath: string): Date {
   try {
     const timestamp = execSync(`git log -1 --format=%cI -- "${filePath}"`, { encoding: 'utf8' }).trim();