feat: split ClaudeAlt into independent package

2026-08-03 15:51:12 +00:00 · 2026-07-25 01:18:17 +10:00
parent 1801be3549
commit f3af93802f
14 changed files with 361 additions and 256 deletions
@@ -0,0 +1,123 @@
+#!/usr/bin/env python3
+"""Give ClaudeAlt an independent Electron identity without changing its protocol."""
+
+import copy
+import hashlib
+import json
+import struct
+import sys
+from pathlib import Path
+
+path = Path(sys.argv[1])
+data = path.read_bytes()
+if len(data) < 16:
+    raise SystemExit("ClaudeAlt app.asar is too small")
+
+_, _, _, header_size = struct.unpack("<IIII", data[:16])
+header = json.loads(data[16 : 16 + header_size])
+base_offset = 16 + ((header_size + 3) & ~3)
+output = bytearray()
+counts = {"package": 0, "socket": 0, "user_agent": 0}
+
+
+def integrity(content: bytes, block_size: int) -> dict:
+    blocks = [
+        hashlib.sha256(content[index : index + block_size]).hexdigest()
+        for index in range(0, len(content), block_size)
+    ] or [hashlib.sha256(b"").hexdigest()]
+    return {
+        "algorithm": "SHA256",
+        "hash": hashlib.sha256(content).hexdigest(),
+        "blockSize": block_size,
+        "blocks": blocks,
+    }
+
+
+def rebuild(node: dict, prefix: str = "") -> dict:
+    result = {}
+    for name, child in node.get("files", {}).items():
+        item_path = f"{prefix}/{name}" if prefix else name
+        if "files" in child:
+            result[name] = {
+                **{key: value for key, value in child.items() if key != "files"},
+                "files": rebuild(child, item_path),
+            }
+            continue
+
+        entry = copy.deepcopy(child)
+        if entry.get("unpacked"):
+            result[name] = entry
+            continue
+
+        offset, size = int(entry["offset"]), int(entry["size"])
+        content = data[base_offset + offset : base_offset + offset + size]
+        changed = False
+
+        if item_path == "package.json":
+            package = json.loads(content)
+            expected = {
+                "productName": "Claude",
+                "desktopName": "com.anthropic.Claude.desktop",
+            }
+            for field, value in expected.items():
+                if package.get(field) != value:
+                    raise SystemExit(
+                        f"unexpected Claude package.json {field}: "
+                        f"{package.get(field)!r} != {value!r}"
+                    )
+            package["productName"] = "ClaudeAlt"
+            package["desktopName"] = "com.anthropic.ClaudeAlt.desktop"
+            content = (json.dumps(package, indent=2) + "\n").encode()
+            counts["package"] += 1
+            changed = True
+
+        old_socket = b"claude-cowork-vm.sock"
+        socket_count = content.count(old_socket)
+        if socket_count:
+            content = content.replace(old_socket, b"claude-alt-cowork-vm.sock")
+            counts["socket"] += socket_count
+            changed = True
+
+        marker = b'P.app.isPackaged||P.app.setName("Claude");RRn();'
+        marker_count = content.count(marker)
+        if marker_count:
+            content = content.replace(
+                marker,
+                b'P.app.isPackaged||P.app.setName("Claude");'
+                b'P.app.userAgentFallback=P.app.userAgentFallback'
+                b'.replaceAll("ClaudeAlt","Claude");RRn();',
+            )
+            counts["user_agent"] += marker_count
+            changed = True
+
+        entry["offset"] = str(len(output))
+        if changed:
+            entry["size"] = len(content)
+            block_size = entry.get("integrity", {}).get("blockSize", 4194304)
+            entry["integrity"] = integrity(content, block_size)
+        output.extend(content)
+        result[name] = entry
+    return result
+
+
+rebuilt_header = {"files": rebuild(header)}
+if counts != {"package": 1, "socket": 1, "user_agent": 1}:
+    raise SystemExit(f"unexpected ClaudeAlt patch counts: {counts}")
+
+header_bytes = json.dumps(rebuilt_header, separators=(",", ":")).encode()
+padded_size = (len(header_bytes) + 3) & ~3
+patched = (
+    struct.pack("<IIII", 4, padded_size + 8, padded_size + 4, len(header_bytes))
+    + header_bytes
+    + b"\0" * (padded_size - len(header_bytes))
+    + bytes(output)
+)
+required = (
+    b"com.anthropic.ClaudeAlt.desktop",
+    b'"productName": "ClaudeAlt"',
+    b'.replaceAll("ClaudeAlt","Claude")',
+    b"claude-alt-cowork-vm.sock",
+)
+if any(patched.count(value) != 1 for value in required):
+    raise SystemExit("ClaudeAlt identity verification failed")
+path.write_bytes(patched)