diff --git a/src/infra/archive-path.test.ts b/src/infra/archive-path.test.ts
index bc900c6964c..02ed7f4ff2d 100644
--- a/src/infra/archive-path.test.ts
+++ b/src/infra/archive-path.test.ts
@@ -1,18 +1,71 @@
 import path from "node:path";
 import { describe, expect, it } from "vitest";
 import {
+  isWindowsDrivePath,
+  normalizeArchiveEntryPath,
   resolveArchiveOutputPath,
   stripArchivePath,
   validateArchiveEntryPath,
 } from "./archive-path.js";
 
 describe("archive path helpers", () => {
-  it("uses custom escape labels in traversal errors", () => {
+  it.each([
+    { value: "C:\\temp\\file.txt", expected: true },
+    { value: "D:/temp/file.txt", expected: true },
+    { value: "tmp/file.txt", expected: false },
+    { value: "/tmp/file.txt", expected: false },
+  ])("detects Windows drive paths for %j", ({ value, expected }) => {
+    expect(isWindowsDrivePath(value)).toBe(expected);
+  });
+
+  it.each([
+    { raw: "dir\\file.txt", expected: "dir/file.txt" },
+    { raw: "dir/file.txt", expected: "dir/file.txt" },
+  ])("normalizes archive separators for %j", ({ raw, expected }) => {
+    expect(normalizeArchiveEntryPath(raw)).toBe(expected);
+  });
+
+  it.each(["", ".", "./"])("accepts empty-like entry paths: %j", (entryPath) => {
+    expect(() => validateArchiveEntryPath(entryPath)).not.toThrow();
+  });
+
+  it.each([
+    {
+      name: "uses custom escape labels in traversal errors",
+      entryPath: "../escape.txt",
+      message: "archive entry escapes targetDir: ../escape.txt",
+    },
+    {
+      name: "rejects Windows drive paths",
+      entryPath: "C:\\temp\\file.txt",
+      message: "archive entry uses a drive path: C:\\temp\\file.txt",
+    },
+    {
+      name: "rejects absolute paths after normalization",
+      entryPath: "/tmp/file.txt",
+      message: "archive entry is absolute: /tmp/file.txt",
+    },
+    {
+      name: "rejects double-slash absolute paths after normalization",
+      entryPath: "\\\\server\\share.txt",
+      message: "archive entry is absolute: \\\\server\\share.txt",
+    },
+  ])("$name", ({ entryPath, message }) => {
     expect(() =>
-      validateArchiveEntryPath("../escape.txt", {
+      validateArchiveEntryPath(entryPath, {
         escapeLabel: "targetDir",
       }),
-    ).toThrow("archive entry escapes targetDir: ../escape.txt");
+    ).toThrow(message);
+  });
+
+  it.each([
+    { entryPath: "a/../escape.txt", stripComponents: 1, expected: "../escape.txt" },
+    { entryPath: "a//b/file.txt", stripComponents: 1, expected: "b/file.txt" },
+    { entryPath: "./", stripComponents: 0, expected: null },
+    { entryPath: "a", stripComponents: 3, expected: null },
+    { entryPath: "dir\\sub\\file.txt", stripComponents: 1, expected: "sub/file.txt" },
+  ])("strips archive paths for %j", ({ entryPath, stripComponents, expected }) => {
+    expect(stripArchivePath(entryPath, stripComponents)).toBe(expected);
   });
 
   it("preserves strip-induced traversal for follow-up validation", () => {
@@ -25,22 +78,40 @@ describe("archive path helpers", () => {
     ).toThrow("archive entry escapes targetDir: ../escape.txt");
   });
 
-  it("keeps resolved output paths inside the root", () => {
-    const rootDir = path.join(path.sep, "tmp", "archive-root");
-    const safe = resolveArchiveOutputPath({
-      rootDir,
+  it.each([
+    {
+      name: "keeps resolved output paths inside the root",
       relPath: "sub/file.txt",
       originalPath: "sub/file.txt",
-    });
-    expect(safe).toBe(path.resolve(rootDir, "sub/file.txt"));
+      expected: path.resolve(path.join(path.sep, "tmp", "archive-root"), "sub/file.txt"),
+    },
+    {
+      name: "rejects output paths that escape the root",
+      relPath: "../escape.txt",
+      originalPath: "../escape.txt",
+      escapeLabel: "targetDir",
+      message: "archive entry escapes targetDir: ../escape.txt",
+    },
+  ])("$name", ({ relPath, originalPath, escapeLabel, expected, message }) => {
+    const rootDir = path.join(path.sep, "tmp", "archive-root");
+    if (message) {
+      expect(() =>
+        resolveArchiveOutputPath({
+          rootDir,
+          relPath,
+          originalPath,
+          escapeLabel,
+        }),
+      ).toThrow(message);
+      return;
+    }
 
-    expect(() =>
+    expect(
       resolveArchiveOutputPath({
         rootDir,
-        relPath: "../escape.txt",
-        originalPath: "../escape.txt",
-        escapeLabel: "targetDir",
+        relPath,
+        originalPath,
       }),
-    ).toThrow("archive entry escapes targetDir: ../escape.txt");
+    ).toBe(expected);
   });
 });