feat(cli): skip unchanged files using device file_hashes.json

Read and update file_hashes.json on deploy; add --force-upload and tests.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_deploy_manifest.py

@@ -0,0 +1,52 @@
+"""Tests for deploy_manifest helpers (host Python)."""
+
+import json
+import os
+import tempfile
+import unittest
+
+from deploy_manifest import (
+    MANIFEST_FILENAME,
+    build_manifest_bytes,
+    normalize_remote_path,
+    parse_manifest,
+    sha256_hex_file,
+)
+
+
+class DeployManifestTests(unittest.TestCase):
+    def test_normalize_remote_path(self):
+        self.assertEqual(normalize_remote_path("/patterns/chase.py"), "patterns/chase.py")
+        self.assertEqual(normalize_remote_path("main.py"), "main.py")
+
+    def test_round_trip_manifest(self):
+        files = {"main.py": "abc", "patterns/x.py": "def"}
+        blob = build_manifest_bytes(files)
+        parsed = parse_manifest(blob)
+        self.assertEqual(parsed, files)
+        doc = json.loads(blob.decode())
+        self.assertEqual(doc["version"], 1)
+        self.assertEqual(doc["algorithm"], "sha256")
+
+    def test_parse_manifest_invalid(self):
+        self.assertEqual(parse_manifest(b"not json"), {})
+        self.assertEqual(parse_manifest(b'{"files": "nope"}'), {})
+
+    def test_sha256_hex_file(self):
+        with tempfile.NamedTemporaryFile(delete=False) as f:
+            f.write(b"hello")
+            path = f.name
+        try:
+            self.assertEqual(
+                sha256_hex_file(path),
+                "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824",
+            )
+        finally:
+            os.unlink(path)
+
+    def test_manifest_filename(self):
+        self.assertEqual(MANIFEST_FILENAME, "file_hashes.json")
+
+
+if __name__ == "__main__":
+    unittest.main()