feat: split ClaudeAlt into independent package

tools/validate_repo.py

@@ -17,6 +17,7 @@ EXPECTED_PACKAGES = (
     "balena-etcher",
     "chatbox",
     "clash-verge-rev",
+    "claude-alt",
     "claude-desktop",
     "codex",
     "fisher",
@@ -43,6 +44,7 @@ REQUIRED_ROOT_FILES = {
     Path("docs/maintenance.md"),
     Path("docs/security-model.md"),
     Path("docs/packages/claude-desktop.md"),
+    Path("docs/packages/claude-alt.md"),
     Path("docs/packages/codex.md"),
     Path("docs/packages/github-desktop.md"),
     Path("docs/packages/opencode.md"),