diff --git a/packages/cli/src/commands/init.ts b/packages/cli/src/commands/init.ts
index 28abbba..781e0dc 100644
--- a/packages/cli/src/commands/init.ts
+++ b/packages/cli/src/commands/init.ts
@@ -341,7 +341,7 @@ export const initCommand = command({
 			imagesDir: siteConfig.imagesDir || undefined,
 			publicDir: siteConfig.publicDir || "./public",
 			outputDir: siteConfig.outputDir || "./dist",
-			pathPrefix: siteConfig.pathPrefix || "/posts",
+			pathPrefix: siteConfig.pathPrefix ?? "/posts",
 			publicationUri,
 			pdsUrl,
 			frontmatter: frontmatterMapping,
diff --git a/packages/cli/src/commands/update.ts b/packages/cli/src/commands/update.ts
index 017244d..11257ea 100644
--- a/packages/cli/src/commands/update.ts
+++ b/packages/cli/src/commands/update.ts
@@ -70,7 +70,7 @@ async function updateConfigFlow(
 	const configSummary = [
 		`Site URL: ${config.siteUrl}`,
 		`Content Dir: ${config.contentDir}`,
-		`Path Prefix: ${config.pathPrefix || "/posts"}`,
+		`Path Prefix: ${config.pathPrefix ?? "/posts"}`,
 		`Publication URI: ${config.publicationUri}`,
 		config.imagesDir ? `Images Dir: ${config.imagesDir}` : null,
 		config.outputDir ? `Output Dir: ${config.outputDir}` : null,
@@ -194,14 +194,14 @@ async function editSiteSettings(
 	const pathPrefix = exitOnCancel(
 		await text({
 			message: "URL path prefix for posts:",
-			initialValue: config.pathPrefix || "/posts",
+			initialValue: config.pathPrefix ?? "/posts",
 		}),
 	);
 
 	return {
 		...config,
 		siteUrl,
-		pathPrefix: pathPrefix || undefined,
+		pathPrefix,
 	};
 }
 
diff --git a/packages/cli/src/lib/markdown.ts b/packages/cli/src/lib/markdown.ts
index 9a7650f..2b80ba8 100644
--- a/packages/cli/src/lib/markdown.ts
+++ b/packages/cli/src/lib/markdown.ts
@@ -231,8 +231,8 @@ export function resolvePostPath(
 	if (pathTemplate) {
 		return resolvePathTemplate(pathTemplate, post);
 	}
-	const prefix = pathPrefix || "/posts";
-	return `${prefix}/${post.slug}`;
+	const prefix = pathPrefix ?? "/posts";
+	return prefix ? `${prefix}/${post.slug}` : `/${post.slug}`;
 }
 
 export async function getContentHash(content: string): Promise<string> {
diff --git a/packages/cli/test/markdown.test.ts b/packages/cli/test/markdown.test.ts
index f7aa692..905df9d 100644
--- a/packages/cli/test/markdown.test.ts
+++ b/packages/cli/test/markdown.test.ts
@@ -1,5 +1,6 @@
 import { describe, expect, it } from "bun:test";
-import { parseFrontmatter } from "../src/lib/markdown";
+import { parseFrontmatter, resolvePostPath } from "../src/lib/markdown";
+import type { BlogPost } from "../src/lib/types";
 
 describe("parseFrontmatter", () => {
 	describe("delimiters", () => {
@@ -385,3 +386,32 @@ title: Post
 		});
 	});
 });
+
+describe("resolvePostPath", () => {
+	const post: BlogPost = {
+		filePath: "/tmp/hello.md",
+		slug: "hello-world",
+		frontmatter: { title: "Hello" } as BlogPost["frontmatter"],
+		content: "",
+		rawContent: "",
+		rawFrontmatter: {},
+	};
+
+	it("defaults to /posts when pathPrefix is undefined", () => {
+		expect(resolvePostPath(post)).toBe("/posts/hello-world");
+	});
+
+	it("uses custom prefix when provided", () => {
+		expect(resolvePostPath(post, "/blog")).toBe("/blog/hello-world");
+	});
+
+	it("omits prefix when pathPrefix is an empty string", () => {
+		expect(resolvePostPath(post, "")).toBe("/hello-world");
+	});
+
+	it("pathTemplate overrides pathPrefix", () => {
+		expect(resolvePostPath(post, "", "/custom/{slug}")).toBe(
+			"/custom/hello-world",
+		);
+	});
+});