diff --git a/skills/oracle/SKILL.md b/skills/oracle/SKILL.md
index 336dd099a..6dacbf432 100644
--- a/skills/oracle/SKILL.md
+++ b/skills/oracle/SKILL.md
@@ -39,6 +39,13 @@ Recommended defaults:
 - Browser run (main path; long-running is normal):
   - `npx -y @steipete/oracle --engine browser --model gpt-5.4-pro -p "<task>" --file "src/**"`
 
+- Whole-repo browser upload (tracked archive; preferred when you want ChatGPT to inspect an entire repo):
+  - `cd /path/to/repo && git archive --format=zip --output /tmp/repo-tracked.zip HEAD`
+  - `npx -y @steipete/oracle --engine browser --browser-attachments always -p "<task>" --file /tmp/repo-tracked.zip`
+  - Notes:
+    - `git archive HEAD` includes tracked files only, so untracked junk like `node_modules`, `.next`, `dist`, and local logs stay out automatically.
+    - If you need extra excludes beyond tracked-file filtering, use git pathspecs or a repo-specific archive script; avoid brittle `grep` pipelines.
+
 - Manual paste fallback (assemble bundle, copy to clipboard):
   - `npx -y @steipete/oracle --render --copy -p "<task>" --file "src/**"`
   - Note: `--copy` is a hidden alias for `--copy-markdown`.
diff --git a/src/browser/prompt.ts b/src/browser/prompt.ts
index fe3ea200b..f97ccea57 100644
--- a/src/browser/prompt.ts
+++ b/src/browser/prompt.ts
@@ -39,6 +39,10 @@ const MEDIA_EXTENSIONS = new Set([
   ".heic",
   ".heif",
   ".pdf",
+  ".zip",
+  ".tar",
+  ".gz",
+  ".7z",
 ]);
 
 export function isMediaFile(filePath: string): boolean {
diff --git a/tests/browser/prompt.test.ts b/tests/browser/prompt.test.ts
index 412693e1e..f6561e4dc 100644
--- a/tests/browser/prompt.test.ts
+++ b/tests/browser/prompt.test.ts
@@ -1,3 +1,5 @@
+import fs from "node:fs/promises";
+import os from "node:os";
 import path from "node:path";
 import { describe, expect, test } from "vitest";
 import { assembleBrowserPrompt } from "../../src/browser/prompt.js";
@@ -213,4 +215,38 @@ describe("assembleBrowserPrompt", () => {
       bundlePath: result.attachments[0]?.displayPath,
     });
   });
+
+  test("treats zip archives as upload attachments", async () => {
+    const tempDir = await fs.mkdtemp(path.join(os.tmpdir(), "oracle-zip-"));
+    const zipPath = path.join(tempDir, "repo-tracked.zip");
+    await fs.writeFile(zipPath, "fake zip payload");
+
+    try {
+      const result = await assembleBrowserPrompt(
+        buildOptions({
+          file: [zipPath],
+          browserAttachments: "always",
+        }),
+        {
+          cwd: "/repo",
+          readFilesImpl: async (paths) => {
+            expect(paths).toEqual([]);
+            return [];
+          },
+        },
+      );
+
+      expect(result.attachmentMode).toBe("upload");
+      expect(result.attachments).toEqual([
+        expect.objectContaining({
+          path: zipPath,
+          displayPath: path.relative("/repo", zipPath),
+        }),
+      ]);
+      expect(result.composerText).toBe("Explain the bug");
+      expect(result.inlineFileCount).toBe(0);
+    } finally {
+      await fs.rm(tempDir, { recursive: true, force: true });
+    }
+  });
 });