cleanup(build): minimize native payload handling

python/sdk-runtime/hatch_build.py

@@ -13,7 +13,6 @@ _PLATFORMS = {
     "linux-arm64": ("manylinux_2_28_aarch64", "dsh-jsonrpc-agent-pkg-linux-arm64"),
     "macos-arm64": ("macosx_11_0_arm64", "dsh-jsonrpc-agent-pkg-macos-arm64"),
 }
-_SPAWN_HELPER_SUFFIX = "-spawn-helper"
 
 
 def _host_platform_tag() -> str:
@@ -50,7 +49,7 @@ class RuntimeBuildHook(BuildHookInterface):
         runtime_files = sorted(runtime_dir.glob("dsh-jsonrpc-agent-pkg-*") if runtime_dir.is_dir() else [])
         expected_files = [expected_executable]
         if "-macos-" in expected_executable:
-            expected_files.append(f"{expected_executable}{_SPAWN_HELPER_SUFFIX}")
+            expected_files.append(f"{expected_executable}-spawn-helper")
         found_files = [path.name for path in runtime_files]
         if found_files != expected_files:
             raise RuntimeError(

python/sdk-runtime/src/deepseek_harness_runtime/__init__.py

@@ -28,7 +28,6 @@ import sys
 from pathlib import Path
 
 PACKAGE_METADATA_FILENAME = "deepseek-harness-runtime.json"
-SPAWN_HELPER_SUFFIX = "-spawn-helper"
 
 RUNTIME_MODE_ENV_VAR = "DSH_RUNTIME_MODE"
 
@@ -85,7 +84,7 @@ def bundled_runtime_path() -> Path:
             + _EXE_ACQUISITION_HINT
         )
     if tag.startswith("macos-"):
-        helper = Path(f"{path}{SPAWN_HELPER_SUFFIX}")
+        helper = Path(f"{path}-spawn-helper")
         if not helper.is_file():
             raise FileNotFoundError(
                 f"deepseek-harness-runtime-bin is missing the node-pty spawn helper at {helper}. "
@@ -153,7 +152,6 @@ def _node_launch_args() -> tuple[str, str]:
 __all__ = [
     "PACKAGE_METADATA_FILENAME",
     "RUNTIME_MODE_ENV_VAR",
-    "SPAWN_HELPER_SUFFIX",
     "bundled_default_config_path",
     "bundled_package_dir",
     "bundled_runtime_path",