diff --git a/src/content.config.ts b/src/content.config.ts
new file mode 100644
index 0000000..fa7b20a
--- /dev/null
+++ b/src/content.config.ts
@@ -0,0 +1,18 @@
+import { defineCollection, z } from 'astro:content';
+import { glob } from 'astro/loaders';
+
+const posts = defineCollection({
+  loader: glob({
+    pattern: '**/*.{md,mdx}',
+    base: './src/content/posts',
+  }),
+  schema: z.object({
+    title: z.string(),
+    date: z.coerce.date(),
+    type: z.enum(['post', 'pattern', 'lesson']).default('post'),
+    tags: z.array(z.string()).default([]),
+    summary: z.string().optional(),
+  }),
+});
+
+export const collections = { posts };
diff --git a/src/content/posts/.gitkeep b/src/content/posts/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/src/utils/reading-time.ts b/src/utils/reading-time.ts
new file mode 100644
index 0000000..e266299
--- /dev/null
+++ b/src/utils/reading-time.ts
@@ -0,0 +1,4 @@
+export function getReadingTime(text: string): number {
+  const words = text.split(/\s+/).filter(Boolean);
+  return Math.max(1, Math.ceil(words.length / 200));
+}
diff --git a/tests/content-config.test.mjs b/tests/content-config.test.mjs
new file mode 100644
index 0000000..3d2e275
--- /dev/null
+++ b/tests/content-config.test.mjs
@@ -0,0 +1,95 @@
+import { describe, it } from 'node:test';
+import { strict as assert } from 'node:assert';
+import { readFileSync, existsSync } from 'node:fs';
+import { resolve } from 'node:path';
+
+const configPath = resolve('src/content.config.ts');
+const postsDir = resolve('src/content/posts');
+
+function readConfig() {
+  return readFileSync(configPath, 'utf-8');
+}
+
+describe('Content collection config', () => {
+  it('should exist at src/content.config.ts', () => {
+    const content = readConfig();
+    assert.ok(content.length > 0, 'Config file should not be empty');
+  });
+
+  it('should import defineCollection from astro:content', () => {
+    const content = readConfig();
+    assert.match(content, /import\s+.*defineCollection.*from\s+['"]astro:content['"]/, 'should import defineCollection');
+  });
+
+  it('should import glob from astro/loaders', () => {
+    const content = readConfig();
+    assert.match(content, /import\s+.*glob.*from\s+['"]astro\/loaders['"]/, 'should import glob loader');
+  });
+
+  it('should import z from astro:content', () => {
+    const content = readConfig();
+    assert.match(content, /import\s+.*z[,\s}].*from\s+['"]astro:content['"]/, 'should import z from astro:content');
+  });
+
+  it('should use glob loader with md/mdx pattern', () => {
+    const content = readConfig();
+    assert.match(content, /glob\s*\(/, 'should call glob()');
+    assert.match(content, /\*\*\/\*\.\{md,mdx\}/, 'should use **/*.{md,mdx} pattern');
+  });
+
+  it('should use ./src/content/posts as base', () => {
+    const content = readConfig();
+    assert.match(content, /\.\/src\/content\/posts/, 'should use ./src/content/posts as base');
+  });
+
+  describe('Schema fields', () => {
+    it('should define title as z.string()', () => {
+      const content = readConfig();
+      assert.match(content, /title\s*:\s*z\.string\(\)/, 'should have title: z.string()');
+    });
+
+    it('should define date as z.coerce.date()', () => {
+      const content = readConfig();
+      assert.match(content, /date\s*:\s*z\.coerce\.date\(\)/, 'should have date: z.coerce.date()');
+    });
+
+    it('should define type as z.enum with post, pattern, lesson and default post', () => {
+      const content = readConfig();
+      assert.match(content, /type\s*:\s*z\.enum\s*\(\s*\[\s*['"]post['"]/, 'should have type: z.enum starting with post');
+      assert.match(content, /['"]pattern['"]/, 'should include pattern in enum');
+      assert.match(content, /['"]lesson['"]/, 'should include lesson in enum');
+      assert.match(content, /\.default\s*\(\s*['"]post['"]\s*\)/, 'should default to post');
+    });
+
+    it('should define tags as z.array(z.string()).default([])', () => {
+      const content = readConfig();
+      assert.match(content, /tags\s*:\s*z\.array\s*\(\s*z\.string\(\)\s*\)\.default\s*\(\s*\[\s*\]\s*\)/, 'should have tags: z.array(z.string()).default([])');
+    });
+
+    it('should define summary as z.string().optional()', () => {
+      const content = readConfig();
+      assert.match(content, /summary\s*:\s*z\.string\(\)\.optional\(\)/, 'should have summary: z.string().optional()');
+    });
+  });
+
+  it('should use z.object for schema', () => {
+    const content = readConfig();
+    assert.match(content, /z\.object\s*\(/, 'should use z.object()');
+  });
+
+  it('should use defineCollection', () => {
+    const content = readConfig();
+    assert.match(content, /defineCollection\s*\(/, 'should call defineCollection()');
+  });
+
+  it('should export collections with posts', () => {
+    const content = readConfig();
+    assert.match(content, /export\s+const\s+collections\s*=\s*\{\s*posts\s*\}/, 'should export collections = { posts }');
+  });
+});
+
+describe('Content posts directory', () => {
+  it('should exist at src/content/posts/', () => {
+    assert.ok(existsSync(postsDir), 'src/content/posts/ directory should exist');
+  });
+});
diff --git a/tests/reading-time.test.mjs b/tests/reading-time.test.mjs
new file mode 100644
index 0000000..9091b6f
--- /dev/null
+++ b/tests/reading-time.test.mjs
@@ -0,0 +1,53 @@
+import { describe, it } from 'node:test';
+import { strict as assert } from 'node:assert';
+import { readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+
+const utilPath = resolve('src/utils/reading-time.ts');
+
+function readUtil() {
+  return readFileSync(utilPath, 'utf-8');
+}
+
+describe('reading-time utility', () => {
+  it('should exist at src/utils/reading-time.ts', () => {
+    const content = readUtil();
+    assert.ok(content.length > 0, 'Utility file should not be empty');
+  });
+
+  it('should export a getReadingTime function', () => {
+    const content = readUtil();
+    assert.match(content, /export\s+(function\s+getReadingTime|const\s+getReadingTime|{[^}]*getReadingTime)/, 'should export getReadingTime');
+  });
+
+  it('should accept a text: string parameter', () => {
+    const content = readUtil();
+    assert.match(content, /getReadingTime\s*\(\s*text\s*:\s*string\s*\)/, 'should accept text: string param');
+  });
+
+  it('should return a number type', () => {
+    const content = readUtil();
+    assert.match(content, /:\s*number/, 'should have number return type');
+  });
+
+  it('should split on whitespace', () => {
+    const content = readUtil();
+    assert.match(content, /split\s*\(\s*\/\\s\+\//, 'should split on whitespace regex');
+  });
+
+  it('should divide by 200 WPM', () => {
+    const content = readUtil();
+    assert.match(content, /200/, 'should use 200 WPM');
+  });
+
+  it('should use Math.max(1, Math.ceil(...))', () => {
+    const content = readUtil();
+    assert.match(content, /Math\.max\s*\(\s*1/, 'should use Math.max(1, ...)');
+    assert.match(content, /Math\.ceil/, 'should use Math.ceil');
+  });
+
+  it('should filter empty strings from split result', () => {
+    const content = readUtil();
+    assert.match(content, /filter/, 'should filter empty strings from split');
+  });
+});