diff --git a/server.js b/server.js
index 57b0881..c192b76 100644
--- a/server.js
+++ b/server.js
@@ -1,6 +1,7 @@
 import http from "node:http";
 import fs from "node:fs";
 import path from "node:path";
+import { exec } from "node:child_process";
 import { fileURLToPath } from "node:url";
 
 const MIME_TYPES = {
@@ -205,12 +206,43 @@ export function createServer(customSiteDir, customPostsDir, customAssetsDir) {
         }
 
         const cleanSlug = querySlug.toLowerCase().replace(/[^a-z0-9_-]/g, "-").replace(/^-+|-+$/g, "");
-        const targetFilePath = path.join(postsDir, `${cleanSlug}.md`);
+        if (!cleanSlug) {
+          res.writeHead(400, { "Content-Type": "application/json" });
+          res.end(JSON.stringify({ error: "Invalid slug parameter" }));
+          return;
+        }
 
+        // 1. Remove source markdown post
+        const targetFilePath = path.join(postsDir, `${cleanSlug}.md`);
         if (fs.existsSync(targetFilePath)) {
           fs.unlinkSync(targetFilePath);
         }
 
+        // 2. Remove compiled static site directory and file
+        const compiledDir = path.join(siteDir, "posts", cleanSlug);
+        if (fs.existsSync(compiledDir)) {
+          fs.rmSync(compiledDir, { recursive: true, force: true });
+        }
+        const compiledHtml = path.join(siteDir, "posts", `${cleanSlug}.html`);
+        if (fs.existsSync(compiledHtml)) {
+          fs.unlinkSync(compiledHtml);
+        }
+
+        // 3. Rebuild static collections (index.html, dispatches, tags) if in full Eleventy environment
+        try {
+          if (fs.existsSync(path.join(process.cwd(), ".eleventy.js"))) {
+            exec("npx @11ty/eleventy", (err) => {
+              if (err) {
+                console.error("[Ingestion API] Error rebuilding site after delete:", err);
+              } else {
+                console.log(`[Ingestion API] Site rebuild complete after unpublishing '${cleanSlug}'.`);
+              }
+            });
+          }
+        } catch (rebuildErr) {
+          console.error("[Ingestion API] Failed to trigger Eleventy rebuild:", rebuildErr);
+        }
+
         res.writeHead(200, { "Content-Type": "application/json" });
         res.end(JSON.stringify({ status: "deleted", slug: cleanSlug }));
         return;
diff --git a/test/ingestion-api.test.js b/test/ingestion-api.test.js
index bcb6ea5..84d7fff 100644
--- a/test/ingestion-api.test.js
+++ b/test/ingestion-api.test.js
@@ -173,6 +173,17 @@ Here is an image: ![[camera-board.png]]
     const assetPath = path.join(tmpAssets, "camera-board.png");
     assert.ok(fs.existsSync(assetPath), "Asset file must be saved");
 
+    // Create simulated compiled static post files in siteDir
+    const compiledPostDir = path.join(tmpDir, "posts", "flock-firmware");
+    fs.mkdirSync(compiledPostDir, { recursive: true });
+    const compiledPostHtml = path.join(compiledPostDir, "index.html");
+    fs.writeFileSync(compiledPostHtml, "<html><body>Simulated compiled post</body></html>");
+    const standalonePostHtml = path.join(tmpDir, "posts", "flock-firmware.html");
+    fs.writeFileSync(standalonePostHtml, "<html><body>Simulated standalone post</body></html>");
+
+    assert.ok(fs.existsSync(compiledPostHtml), "Simulated compiled post must exist before delete");
+    assert.ok(fs.existsSync(standalonePostHtml), "Simulated standalone post must exist before delete");
+
     // Delete post
     const resDelete = await fetch(`http://127.0.0.1:${port}/api/posts?slug=flock-firmware`, {
       method: "DELETE",
@@ -182,6 +193,8 @@ Here is an image: ![[camera-board.png]]
     });
     assert.strictEqual(resDelete.status, 200, "Delete must return 200");
     assert.ok(!fs.existsSync(writtenPath), "Post markdown file must be deleted");
+    assert.ok(!fs.existsSync(compiledPostDir), "Compiled post directory must be deleted from _site");
+    assert.ok(!fs.existsSync(standalonePostHtml), "Compiled standalone HTML must be deleted from _site");
   } finally {
     await new Promise((resolve) => server.close(resolve));
     fs.rmSync(tmpDir, { recursive: true, force: true });
@@ -190,7 +203,7 @@ Here is an image: ![[camera-board.png]]
   }
 });
 
-test("Ingestion API: adversarial protection against path traversal in slug", async () => {
+test("Ingestion API: adversarial protection against path traversal in slug and DELETE validation", async () => {
   const tmpDir = fs.mkdtempSync(path.join(process.cwd(), "test-tmp-site-"));
   const tmpPosts = fs.mkdtempSync(path.join(process.cwd(), "test-tmp-posts-"));
   process.env.API_SECRET = TEST_SECRET;
@@ -200,6 +213,7 @@ test("Ingestion API: adversarial protection against path traversal in slug", asy
   const port = server.address().port;
 
   try {
+    // 1. Path traversal in POST
     const resTraversal = await fetch(`http://127.0.0.1:${port}/api/posts`, {
       method: "POST",
       headers: {
@@ -218,6 +232,42 @@ test("Ingestion API: adversarial protection against path traversal in slug", asy
     } else {
       assert.strictEqual(resTraversal.status, 400, "Invalid slug must return 400");
     }
+
+    // 2. DELETE without auth token
+    const resDeleteNoAuth = await fetch(`http://127.0.0.1:${port}/api/posts?slug=any-post`, {
+      method: "DELETE"
+    });
+    assert.strictEqual(resDeleteNoAuth.status, 401, "DELETE without Bearer token must return 401");
+
+    // 3. DELETE with missing slug parameter
+    const resDeleteNoSlug = await fetch(`http://127.0.0.1:${port}/api/posts`, {
+      method: "DELETE",
+      headers: {
+        Authorization: `Bearer ${TEST_SECRET}`
+      }
+    });
+    assert.strictEqual(resDeleteNoSlug.status, 400, "DELETE without slug parameter must return 400");
+
+    // 4. DELETE with invalid/empty slug
+    const resDeleteBadSlug = await fetch(`http://127.0.0.1:${port}/api/posts?slug=///`, {
+      method: "DELETE",
+      headers: {
+        Authorization: `Bearer ${TEST_SECRET}`
+      }
+    });
+    assert.strictEqual(resDeleteBadSlug.status, 400, "DELETE with invalid slug must return 400");
+
+    // 5. DELETE non-existent post succeeds gracefully (idempotent)
+    const resDeleteNonExistent = await fetch(`http://127.0.0.1:${port}/api/posts?slug=non-existent-post`, {
+      method: "DELETE",
+      headers: {
+        Authorization: `Bearer ${TEST_SECRET}`
+      }
+    });
+    assert.strictEqual(resDeleteNonExistent.status, 200, "DELETE non-existent post must return 200 idempotently");
+    const jsonNonExistent = await resDeleteNonExistent.json();
+    assert.strictEqual(jsonNonExistent.status, "deleted");
+    assert.strictEqual(jsonNonExistent.slug, "non-existent-post");
   } finally {
     await new Promise((resolve) => server.close(resolve));
     fs.rmSync(tmpDir, { recursive: true, force: true });