diff --git a/sdk/python-runtime/README.md b/sdk/python-runtime/README.md
index 0e7b26d5fc..62e45413a0 100644
--- a/sdk/python-runtime/README.md
+++ b/sdk/python-runtime/README.md
@@ -1,9 +1,17 @@
 # Codex CLI Runtime for Python SDK
 
-Platform-specific runtime package consumed by the published `codex-app-server-sdk`.
+Platform-specific runtime package consumed by the published `openai-codex` SDK.
 
 This package is staged during release so the SDK can pin an exact Codex CLI
-version without checking platform binaries into the repo.
+version without checking platform binaries into the repo. The distribution name
+is `openai-codex-cli-bin`, while the import module remains `codex_cli_bin`.
 
-`codex-cli-bin` is intentionally wheel-only. Do not build or publish an sdist
-for this package.
+`openai-codex-cli-bin` is intentionally wheel-only. Do not build or publish an
+sdist for this package.
+
+Expected wheel contents:
+
+- macOS/Linux: `codex_cli_bin/bin/codex`
+- Windows: `codex_cli_bin/bin/codex.exe`,
+  `codex_cli_bin/bin/codex-command-runner.exe`, and
+  `codex_cli_bin/bin/codex-windows-sandbox-setup.exe`
diff --git a/sdk/python-runtime/hatch_build.py b/sdk/python-runtime/hatch_build.py
index 319e6973fb..2afc341766 100644
--- a/sdk/python-runtime/hatch_build.py
+++ b/sdk/python-runtime/hatch_build.py
@@ -1,15 +1,34 @@
 from __future__ import annotations
 
+import os
+
 from hatchling.builders.hooks.plugin.interface import BuildHookInterface
 
+PLATFORM_TAG_BY_TARGET = {
+    "aarch64-apple-darwin": "macosx_11_0_arm64",
+    "x86_64-apple-darwin": "macosx_10_12_x86_64",
+    "aarch64-unknown-linux-musl": "musllinux_1_2_aarch64",
+    "x86_64-unknown-linux-musl": "musllinux_1_2_x86_64",
+    "aarch64-pc-windows-msvc": "win_arm64",
+    "x86_64-pc-windows-msvc": "win_amd64",
+}
+
 
 class RuntimeBuildHook(BuildHookInterface):
     def initialize(self, version: str, build_data: dict[str, object]) -> None:
         del version
         if self.target_name == "sdist":
             raise RuntimeError(
-                "codex-cli-bin is wheel-only; build and publish platform wheels only."
+                "openai-codex-cli-bin is wheel-only; build and publish platform wheels only."
             )
 
         build_data["pure_python"] = False
-        build_data["infer_tag"] = True
+        target = os.environ.get("CODEX_PYTHON_RUNTIME_TARGET")
+        if target is None:
+            build_data["infer_tag"] = True
+            return
+
+        platform_tag = PLATFORM_TAG_BY_TARGET.get(target)
+        if platform_tag is None:
+            raise RuntimeError(f"Unsupported Codex Python runtime target: {target}")
+        build_data["tag"] = f"py3-none-{platform_tag}"
diff --git a/sdk/python-runtime/pyproject.toml b/sdk/python-runtime/pyproject.toml
index 761dccbb9f..281cb7d1a4 100644
--- a/sdk/python-runtime/pyproject.toml
+++ b/sdk/python-runtime/pyproject.toml
@@ -3,7 +3,7 @@ requires = ["hatchling>=1.24.0"]
 build-backend = "hatchling.build"
 
 [project]
-name = "codex-cli-bin"
+name = "openai-codex-cli-bin"
 version = "0.0.0-dev"
 description = "Pinned Codex CLI runtime for the Python SDK"
 readme = "README.md"
diff --git a/sdk/python-runtime/src/codex_cli_bin/__init__.py b/sdk/python-runtime/src/codex_cli_bin/__init__.py
index 8059d39211..cf0720af12 100644
--- a/sdk/python-runtime/src/codex_cli_bin/__init__.py
+++ b/sdk/python-runtime/src/codex_cli_bin/__init__.py
@@ -3,12 +3,25 @@ from __future__ import annotations
 import os
 from pathlib import Path
 
-PACKAGE_NAME = "codex-cli-bin"
+PACKAGE_NAME = "openai-codex-cli-bin"
+
+
+def bundled_bin_dir() -> Path:
+    return Path(__file__).resolve().parent / "bin"
+
+
+def bundled_runtime_files() -> tuple[Path, ...]:
+    names = (
+        ("codex.exe", "codex-command-runner.exe", "codex-windows-sandbox-setup.exe")
+        if os.name == "nt"
+        else ("codex",)
+    )
+    return tuple(bundled_bin_dir() / name for name in names)
 
 
 def bundled_codex_path() -> Path:
     exe = "codex.exe" if os.name == "nt" else "codex"
-    path = Path(__file__).resolve().parent / "bin" / exe
+    path = bundled_bin_dir() / exe
     if not path.is_file():
         raise FileNotFoundError(
             f"{PACKAGE_NAME} is installed but missing its packaged codex binary at {path}"
@@ -16,4 +29,9 @@ def bundled_codex_path() -> Path:
     return path
 
 
-__all__ = ["PACKAGE_NAME", "bundled_codex_path"]
+__all__ = [
+    "PACKAGE_NAME",
+    "bundled_bin_dir",
+    "bundled_codex_path",
+    "bundled_runtime_files",
+]
diff --git a/sdk/python/_runtime_setup.py b/sdk/python/_runtime_setup.py
index 5eb3999f4c..e878293f87 100644
--- a/sdk/python/_runtime_setup.py
+++ b/sdk/python/_runtime_setup.py
@@ -15,7 +15,7 @@ import urllib.request
 import zipfile
 from pathlib import Path
 
-PACKAGE_NAME = "codex-cli-bin"
+PACKAGE_NAME = "openai-codex-cli-bin"
 PINNED_RUNTIME_VERSION = "0.116.0-alpha.1"
 REPO_SLUG = "openai/codex"
 
@@ -39,17 +39,20 @@ def ensure_runtime_package_installed(
         installed_version = _installed_runtime_version(python_executable)
     normalized_requested = _normalized_package_version(requested_version)
 
-    if installed_version is not None and _normalized_package_version(installed_version) == normalized_requested:
+    if (
+        installed_version is not None
+        and _normalized_package_version(installed_version) == normalized_requested
+    ):
         return requested_version
 
     with tempfile.TemporaryDirectory(prefix="codex-python-runtime-") as temp_root_str:
         temp_root = Path(temp_root_str)
         archive_path = _download_release_archive(requested_version, temp_root)
-        runtime_binary = _extract_runtime_binary(archive_path, temp_root)
+        runtime_bundle_dir = _extract_runtime_bundle(archive_path, temp_root)
         staged_runtime_dir = _stage_runtime_package(
             sdk_python_dir,
             requested_version,
-            runtime_binary,
+            runtime_bundle_dir,
             temp_root / "runtime-stage",
         )
         _install_runtime_package(python_executable, staged_runtime_dir, install_target)
@@ -61,7 +64,10 @@ def ensure_runtime_package_installed(
         importlib.invalidate_caches()
 
     installed_version = _installed_runtime_version(python_executable)
-    if installed_version is None or _normalized_package_version(installed_version) != normalized_requested:
+    if (
+        installed_version is None
+        or _normalized_package_version(installed_version) != normalized_requested
+    ):
         raise RuntimeSetupError(
             f"Expected {PACKAGE_NAME} {requested_version} in {python_executable}, "
             f"but found {installed_version!r} after installation."
@@ -105,7 +111,7 @@ def _installed_runtime_version(python_executable: str | Path) -> str | None:
         "try:\n"
         "    from codex_cli_bin import bundled_codex_path\n"
         "    bundled_codex_path()\n"
-        "    print(json.dumps({'version': importlib.metadata.version('codex-cli-bin')}))\n"
+        f"    print(json.dumps({{'version': importlib.metadata.version({PACKAGE_NAME!r})}}))\n"
         "except Exception:\n"
         "    sys.exit(1)\n"
     )
@@ -172,7 +178,9 @@ def _download_release_archive(version: str, temp_root: Path) -> Path:
     metadata = _release_metadata(version)
     assets = metadata.get("assets")
     if not isinstance(assets, list):
-        raise RuntimeSetupError(f"Release rust-v{version} returned malformed assets metadata.")
+        raise RuntimeSetupError(
+            f"Release rust-v{version} returned malformed assets metadata."
+        )
     asset = next(
         (
             item
@@ -198,7 +206,10 @@ def _download_release_archive(version: str, temp_root: Path) -> Path:
                 headers=_github_api_headers("application/octet-stream"),
             )
             try:
-                with urllib.request.urlopen(request) as response, archive_path.open("wb") as fh:
+                with (
+                    urllib.request.urlopen(request) as response,
+                    archive_path.open("wb") as fh,
+                ):
                     shutil.copyfileobj(response, fh)
                 return archive_path
             except urllib.error.HTTPError:
@@ -236,7 +247,7 @@ def _download_release_archive(version: str, temp_root: Path) -> Path:
     return archive_path
 
 
-def _extract_runtime_binary(archive_path: Path, temp_root: Path) -> Path:
+def _extract_runtime_bundle(archive_path: Path, temp_root: Path) -> Path:
     extract_dir = temp_root / "extracted"
     extract_dir.mkdir(parents=True, exist_ok=True)
     if archive_path.name.endswith(".tar.gz"):
@@ -249,38 +260,24 @@ def _extract_runtime_binary(archive_path: Path, temp_root: Path) -> Path:
         with zipfile.ZipFile(archive_path) as zip_file:
             zip_file.extractall(extract_dir)
     else:
-        raise RuntimeSetupError(f"Unsupported release archive format: {archive_path.name}")
-
-    binary_name = runtime_binary_name()
-    archive_stem = archive_path.name.removesuffix(".tar.gz").removesuffix(".zip")
-    candidates = [
-        path
-        for path in extract_dir.rglob("*")
-        if path.is_file()
-        and (
-            path.name == binary_name
-            or path.name == archive_stem
-            or path.name.startswith("codex-")
-        )
-    ]
-    if not candidates:
         raise RuntimeSetupError(
-            f"Failed to find {binary_name} in extracted runtime archive {archive_path.name}."
+            f"Unsupported release archive format: {archive_path.name}"
         )
-    return candidates[0]
+
+    return extract_dir
 
 
 def _stage_runtime_package(
     sdk_python_dir: Path,
     runtime_version: str,
-    runtime_binary: Path,
+    runtime_bundle_dir: Path,
     staging_dir: Path,
 ) -> Path:
     script_module = _load_update_script_module(sdk_python_dir)
     return script_module.stage_python_runtime_package(  # type: ignore[no-any-return]
         staging_dir,
         runtime_version,
-        runtime_binary.resolve(),
+        runtime_bundle_dir.resolve(),
     )
 
 
diff --git a/sdk/python/scripts/update_sdk_artifacts.py b/sdk/python/scripts/update_sdk_artifacts.py
index 6685fd0999..8cbd0b8618 100755
--- a/sdk/python/scripts/update_sdk_artifacts.py
+++ b/sdk/python/scripts/update_sdk_artifacts.py
@@ -17,6 +17,9 @@ from dataclasses import dataclass
 from pathlib import Path
 from typing import Any, Callable, Sequence, get_args, get_origin
 
+SDK_PKG_NAME = "openai-codex"
+RUNTIME_PKG_NAME = "openai-codex-cli-bin"
+
 
 def repo_root() -> Path:
     return Path(__file__).resolve().parents[3]
@@ -45,16 +48,30 @@ def schema_root_dir() -> Path:
     return repo_root() / "codex-rs" / "app-server-protocol" / "schema" / "json"
 
 
-def _is_windows() -> bool:
-    return platform.system().lower().startswith("win")
+def _is_windows(system_name: str | None = None) -> bool:
+    return (system_name or platform.system()).lower().startswith("win")
 
 
-def runtime_binary_name() -> str:
-    return "codex.exe" if _is_windows() else "codex"
+def runtime_binary_name(system_name: str | None = None) -> str:
+    return "codex.exe" if _is_windows(system_name) else "codex"
+
+
+def runtime_file_names(system_name: str | None = None) -> tuple[str, ...]:
+    if _is_windows(system_name):
+        return (
+            "codex.exe",
+            "codex-command-runner.exe",
+            "codex-windows-sandbox-setup.exe",
+        )
+    return ("codex",)
+
+
+def staged_runtime_bin_dir(root: Path) -> Path:
+    return root / "src" / "codex_cli_bin" / "bin"
 
 
 def staged_runtime_bin_path(root: Path) -> Path:
-    return root / "src" / "codex_cli_bin" / "bin" / runtime_binary_name()
+    return staged_runtime_bin_dir(root) / runtime_binary_name()
 
 
 def run(cmd: list[str], cwd: Path) -> None:
@@ -110,6 +127,39 @@ def _rewrite_project_version(pyproject_text: str, version: str) -> str:
     return updated
 
 
+def _rewrite_project_name(pyproject_text: str, name: str) -> str:
+    updated, count = re.subn(
+        r'^name = "[^"]+"$',
+        f'name = "{name}"',
+        pyproject_text,
+        count=1,
+        flags=re.MULTILINE,
+    )
+    if count != 1:
+        raise RuntimeError("Could not rewrite project name in pyproject.toml")
+    return updated
+
+
+def normalize_python_package_version(version: str) -> str:
+    stripped = version.strip()
+    if re.fullmatch(r"\d+\.\d+\.\d+(?:a\d+|b\d+|\.dev\d+)?", stripped):
+        return stripped
+
+    prerelease_match = re.fullmatch(
+        r"(\d+\.\d+\.\d+)-(alpha|beta)\.(\d+)",
+        stripped,
+    )
+    if prerelease_match is not None:
+        base, prerelease, number = prerelease_match.groups()
+        marker = "a" if prerelease == "alpha" else "b"
+        return f"{base}{marker}{number}"
+
+    raise RuntimeError(
+        "Unsupported Python package version. Expected x.y.z, x.y.z-alpha.n, "
+        f"x.y.z-beta.n, or an already-normalized PEP 440 version; got {version!r}."
+    )
+
+
 def _rewrite_sdk_runtime_dependency(pyproject_text: str, runtime_version: str) -> str:
     match = re.search(r"^dependencies = \[(.*?)\]$", pyproject_text, flags=re.MULTILINE)
     if match is None:
@@ -118,15 +168,46 @@ def _rewrite_sdk_runtime_dependency(pyproject_text: str, runtime_version: str) -
         )
 
     raw_items = [item.strip() for item in match.group(1).split(",") if item.strip()]
-    raw_items = [item for item in raw_items if "codex-cli-bin" not in item]
-    raw_items.append(f'"codex-cli-bin=={runtime_version}"')
+    raw_items = [
+        item
+        for item in raw_items
+        if "codex-cli-bin" not in item and RUNTIME_PKG_NAME not in item
+    ]
+    raw_items.append(f'"{RUNTIME_PKG_NAME}=={runtime_version}"')
     replacement = "dependencies = [\n  " + ",\n  ".join(raw_items) + ",\n]"
     return pyproject_text[: match.start()] + replacement + pyproject_text[match.end() :]
 
 
+def _rewrite_sdk_init_version(init_text: str, sdk_version: str) -> str:
+    updated, count = re.subn(
+        r'^__version__ = "[^"]+"$',
+        f'__version__ = "{sdk_version}"',
+        init_text,
+        count=1,
+        flags=re.MULTILINE,
+    )
+    if count != 1:
+        raise RuntimeError("Could not rewrite SDK __version__")
+    return updated
+
+
+def _rewrite_sdk_client_version(client_text: str, sdk_version: str) -> str:
+    updated, count = re.subn(
+        r'client_version: str = "[^"]+"',
+        f'client_version: str = "{sdk_version}"',
+        client_text,
+        count=1,
+    )
+    if count != 1:
+        raise RuntimeError("Could not rewrite AppServerConfig.client_version")
+    return updated
+
+
 def stage_python_sdk_package(
     staging_dir: Path, sdk_version: str, runtime_version: str
 ) -> Path:
+    sdk_version = normalize_python_package_version(sdk_version)
+    runtime_version = normalize_python_package_version(runtime_version)
     _copy_package_tree(sdk_root(), staging_dir)
     sdk_bin_dir = staging_dir / "src" / "codex_app_server" / "bin"
     if sdk_bin_dir.exists():
@@ -134,32 +215,88 @@ def stage_python_sdk_package(
 
     pyproject_path = staging_dir / "pyproject.toml"
     pyproject_text = pyproject_path.read_text()
+    pyproject_text = _rewrite_project_name(pyproject_text, SDK_PKG_NAME)
     pyproject_text = _rewrite_project_version(pyproject_text, sdk_version)
     pyproject_text = _rewrite_sdk_runtime_dependency(pyproject_text, runtime_version)
     pyproject_path.write_text(pyproject_text)
+
+    init_path = staging_dir / "src" / "codex_app_server" / "__init__.py"
+    init_path.write_text(_rewrite_sdk_init_version(init_path.read_text(), sdk_version))
+
+    client_path = staging_dir / "src" / "codex_app_server" / "client.py"
+    client_path.write_text(
+        _rewrite_sdk_client_version(client_path.read_text(), sdk_version)
+    )
     return staging_dir
 
 
 def stage_python_runtime_package(
-    staging_dir: Path, runtime_version: str, binary_path: Path
+    staging_dir: Path, runtime_version: str, runtime_bundle_dir: Path
 ) -> Path:
+    runtime_version = normalize_python_package_version(runtime_version)
     _copy_package_tree(python_runtime_root(), staging_dir)
 
     pyproject_path = staging_dir / "pyproject.toml"
-    pyproject_path.write_text(
-        _rewrite_project_version(pyproject_path.read_text(), runtime_version)
-    )
+    pyproject_text = _rewrite_project_name(pyproject_path.read_text(), RUNTIME_PKG_NAME)
+    pyproject_text = _rewrite_project_version(pyproject_text, runtime_version)
+    pyproject_path.write_text(pyproject_text)
 
-    out_bin = staged_runtime_bin_path(staging_dir)
-    out_bin.parent.mkdir(parents=True, exist_ok=True)
-    shutil.copy2(binary_path, out_bin)
-    if not _is_windows():
-        out_bin.chmod(
-            out_bin.stat().st_mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH
-        )
+    out_bin_dir = staged_runtime_bin_dir(staging_dir)
+    out_bin_dir.mkdir(parents=True, exist_ok=True)
+    for runtime_file_name in runtime_file_names():
+        source = _find_runtime_bundle_file(runtime_bundle_dir, runtime_file_name)
+        out_path = out_bin_dir / runtime_file_name
+        shutil.copy2(source, out_path)
+        if not _is_windows():
+            out_path.chmod(
+                out_path.stat().st_mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH
+            )
     return staging_dir
 
 
+def _find_runtime_bundle_file(runtime_bundle_dir: Path, destination_name: str) -> Path:
+    if not runtime_bundle_dir.is_dir():
+        raise RuntimeError(f"Runtime bundle directory not found: {runtime_bundle_dir}")
+
+    exact = runtime_bundle_dir / destination_name
+    if exact.is_file():
+        return exact
+
+    patterns = {
+        "codex": re.compile(r"^codex-(?!responses-api-proxy)[^.]+$"),
+        "codex.exe": re.compile(
+            r"^codex-(?!command-runner|windows-sandbox-setup|responses-api-proxy).+\.exe$"
+        ),
+        "codex-command-runner.exe": re.compile(r"^codex-command-runner-.+\.exe$"),
+        "codex-windows-sandbox-setup.exe": re.compile(
+            r"^codex-windows-sandbox-setup-.+\.exe$"
+        ),
+    }
+    pattern = patterns.get(destination_name)
+    candidates = (
+        []
+        if pattern is None
+        else sorted(
+            path
+            for path in runtime_bundle_dir.iterdir()
+            if path.is_file() and pattern.fullmatch(path.name)
+        )
+    )
+    if len(candidates) == 1:
+        return candidates[0]
+    if len(candidates) > 1:
+        candidate_names = ", ".join(path.name for path in candidates)
+        raise RuntimeError(
+            f"Runtime bundle has multiple candidates for {destination_name}: "
+            f"{candidate_names}"
+        )
+
+    raise RuntimeError(
+        f"Runtime bundle {runtime_bundle_dir} is missing required file "
+        f"{destination_name}"
+    )
+
+
 def _flatten_string_enum_one_of(definition: dict[str, Any]) -> bool:
     branches = definition.get("oneOf")
     if not isinstance(branches, list) or not branches:
@@ -928,7 +1065,7 @@ def build_parser() -> argparse.ArgumentParser:
     stage_sdk_parser.add_argument(
         "--runtime-version",
         required=True,
-        help="Pinned codex-cli-bin version for the staged SDK package",
+        help=f"Pinned {RUNTIME_PKG_NAME} version for the staged SDK package",
     )
     stage_sdk_parser.add_argument(
         "--sdk-version",
@@ -945,9 +1082,9 @@ def build_parser() -> argparse.ArgumentParser:
         help="Output directory for the staged runtime package",
     )
     stage_runtime_parser.add_argument(
-        "runtime_binary",
+        "runtime_bundle_dir",
         type=Path,
-        help="Path to the codex binary to package for this platform",
+        help="Directory containing the Codex runtime files to package for this platform",
     )
     stage_runtime_parser.add_argument(
         "--runtime-version",
@@ -984,7 +1121,7 @@ def run_command(args: argparse.Namespace, ops: CliOps) -> None:
         ops.stage_python_runtime_package(
             args.staging_dir,
             args.runtime_version,
-            args.runtime_binary.resolve(),
+            args.runtime_bundle_dir.resolve(),
         )
 
 
diff --git a/sdk/python/src/codex_app_server/client.py b/sdk/python/src/codex_app_server/client.py
index 146d5186e1..c5e32a8c46 100644
--- a/sdk/python/src/codex_app_server/client.py
+++ b/sdk/python/src/codex_app_server/client.py
@@ -47,7 +47,8 @@ from .retry import retry_on_overload
 
 ModelT = TypeVar("ModelT", bound=BaseModel)
 ApprovalHandler = Callable[[str, JsonObject | None], JsonObject]
-RUNTIME_PKG_NAME = "codex-cli-bin"
+SDK_PKG_NAME = "openai-codex"
+RUNTIME_PKG_NAME = "openai-codex-cli-bin"
 
 
 def _params_dict(
diff --git a/sdk/python/tests/test_artifact_workflow_and_binaries.py b/sdk/python/tests/test_artifact_workflow_and_binaries.py
index b19dc745a3..cc439c9823 100644
--- a/sdk/python/tests/test_artifact_workflow_and_binaries.py
+++ b/sdk/python/tests/test_artifact_workflow_and_binaries.py
@@ -29,7 +29,22 @@ def _load_runtime_setup_module():
     runtime_setup_path = ROOT / "_runtime_setup.py"
     spec = importlib.util.spec_from_file_location("_runtime_setup", runtime_setup_path)
     if spec is None or spec.loader is None:
-        raise AssertionError(f"Failed to load runtime setup module: {runtime_setup_path}")
+        raise AssertionError(
+            f"Failed to load runtime setup module: {runtime_setup_path}"
+        )
+    module = importlib.util.module_from_spec(spec)
+    sys.modules[spec.name] = module
+    spec.loader.exec_module(module)
+    return module
+
+
+def _load_runtime_package_module(package_root: Path):
+    runtime_init = package_root / "src" / "codex_cli_bin" / "__init__.py"
+    spec = importlib.util.spec_from_file_location(
+        "codex_cli_bin_under_test", runtime_init
+    )
+    if spec is None or spec.loader is None:
+        raise AssertionError(f"Failed to load runtime package module: {runtime_init}")
     module = importlib.util.module_from_spec(spec)
     sys.modules[spec.name] = module
     spec.loader.exec_module(module)
@@ -168,7 +183,9 @@ def test_examples_readme_matches_pinned_runtime_version() -> None:
     )
 
 
-def test_release_metadata_retries_without_invalid_auth(monkeypatch: pytest.MonkeyPatch) -> None:
+def test_release_metadata_retries_without_invalid_auth(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
     runtime_setup = _load_runtime_setup_module()
     authorizations: list[str | None] = []
 
@@ -198,6 +215,14 @@ def test_runtime_package_is_wheel_only_and_builds_platform_specific_wheels() ->
     )
     hook_source = (ROOT.parent / "python-runtime" / "hatch_build.py").read_text()
     hook_tree = ast.parse(hook_source)
+    platform_tag_assignment = next(
+        node
+        for node in hook_tree.body
+        if isinstance(node, ast.Assign)
+        and len(node.targets) == 1
+        and isinstance(node.targets[0], ast.Name)
+        and node.targets[0].id == "PLATFORM_TAG_BY_TARGET"
+    )
     initialize_fn = next(
         node
         for node in ast.walk(hook_tree)
@@ -235,6 +260,7 @@ def test_runtime_package_is_wheel_only_and_builds_platform_specific_wheels() ->
         and isinstance(node.value, ast.Constant)
     }
 
+    assert pyproject["project"]["name"] == "openai-codex-cli-bin"
     assert pyproject["tool"]["hatch"]["build"]["targets"]["wheel"] == {
         "packages": ["src/codex_cli_bin"],
         "include": ["src/codex_cli_bin/bin/**"],
@@ -244,23 +270,51 @@ def test_runtime_package_is_wheel_only_and_builds_platform_specific_wheels() ->
         "hooks": {"custom": {}},
     }
     assert sdist_guard is not None
-    assert build_data_assignments == {"pure_python": False, "infer_tag": True}
+    assert build_data_assignments == {"pure_python": False}
+    assert ast.literal_eval(platform_tag_assignment.value) == {
+        "aarch64-apple-darwin": "macosx_11_0_arm64",
+        "x86_64-apple-darwin": "macosx_10_12_x86_64",
+        "aarch64-unknown-linux-musl": "musllinux_1_2_aarch64",
+        "x86_64-unknown-linux-musl": "musllinux_1_2_x86_64",
+        "aarch64-pc-windows-msvc": "win_arm64",
+        "x86_64-pc-windows-msvc": "win_amd64",
+    }
+    assert "CODEX_PYTHON_RUNTIME_TARGET" in hook_source
+    assert '"infer_tag"' in hook_source
+    assert '"tag"' in hook_source
 
 
-def test_stage_runtime_release_copies_binary_and_sets_version(tmp_path: Path) -> None:
+def test_python_release_version_normalization() -> None:
     script = _load_update_script_module()
-    fake_binary = tmp_path / script.runtime_binary_name()
+
+    assert script.normalize_python_package_version("1.2.3") == "1.2.3"
+    assert script.normalize_python_package_version("1.2.3-alpha.4") == "1.2.3a4"
+    assert script.normalize_python_package_version("1.2.3-beta.5") == "1.2.3b5"
+    assert script.normalize_python_package_version("1.2.3a4") == "1.2.3a4"
+    assert script.normalize_python_package_version("0.0.0.dev0") == "0.0.0.dev0"
+
+    with pytest.raises(RuntimeError, match="Unsupported Python package version"):
+        script.normalize_python_package_version("1.2.3-rc.1")
+
+
+def test_stage_runtime_release_copies_bundle_and_sets_version(tmp_path: Path) -> None:
+    script = _load_update_script_module()
+    bundle_dir = tmp_path / "bundle"
+    bundle_dir.mkdir()
+    fake_binary = bundle_dir / script.runtime_binary_name()
     fake_binary.write_text("fake codex\n")
 
     staged = script.stage_python_runtime_package(
         tmp_path / "runtime-stage",
-        "1.2.3",
-        fake_binary,
+        "1.2.3-alpha.4",
+        bundle_dir,
     )
 
     assert staged == tmp_path / "runtime-stage"
     assert script.staged_runtime_bin_path(staged).read_text() == "fake codex\n"
-    assert 'version = "1.2.3"' in (staged / "pyproject.toml").read_text()
+    pyproject = (staged / "pyproject.toml").read_text()
+    assert 'name = "openai-codex-cli-bin"' in pyproject
+    assert 'version = "1.2.3a4"' in pyproject
 
 
 def test_stage_runtime_release_replaces_existing_staging_dir(tmp_path: Path) -> None:
@@ -270,13 +324,15 @@ def test_stage_runtime_release_replaces_existing_staging_dir(tmp_path: Path) ->
     old_file.parent.mkdir(parents=True)
     old_file.write_text("stale")
 
-    fake_binary = tmp_path / script.runtime_binary_name()
+    bundle_dir = tmp_path / "bundle"
+    bundle_dir.mkdir()
+    fake_binary = bundle_dir / script.runtime_binary_name()
     fake_binary.write_text("fake codex\n")
 
     staged = script.stage_python_runtime_package(
         staging_dir,
         "1.2.3",
-        fake_binary,
+        bundle_dir,
     )
 
     assert staged == staging_dir
@@ -284,13 +340,132 @@ def test_stage_runtime_release_replaces_existing_staging_dir(tmp_path: Path) ->
     assert script.staged_runtime_bin_path(staged).read_text() == "fake codex\n"
 
 
-def test_stage_sdk_release_injects_exact_runtime_pin(tmp_path: Path) -> None:
+def test_stage_runtime_release_normalizes_target_suffixed_names(
+    tmp_path: Path,
+) -> None:
     script = _load_update_script_module()
-    staged = script.stage_python_sdk_package(tmp_path / "sdk-stage", "0.2.1", "1.2.3")
+    bundle_dir = tmp_path / "bundle"
+    bundle_dir.mkdir()
+    (bundle_dir / "codex-x86_64-unknown-linux-musl").write_text("fake codex\n")
+
+    staged = script.stage_python_runtime_package(
+        tmp_path / "runtime-stage",
+        "1.2.3",
+        bundle_dir,
+    )
+
+    assert (staged / "src" / "codex_cli_bin" / "bin" / "codex").read_text() == (
+        "fake codex\n"
+    )
+
+
+def test_stage_runtime_release_requires_complete_windows_bundle(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    script = _load_update_script_module()
+    monkeypatch.setattr(script.platform, "system", lambda: "Windows")
+    bundle_dir = tmp_path / "bundle"
+    bundle_dir.mkdir()
+    (bundle_dir / "codex-x86_64-pc-windows-msvc.exe").write_text("codex\n")
+    (bundle_dir / "codex-command-runner-x86_64-pc-windows-msvc.exe").write_text(
+        "runner\n"
+    )
+    (bundle_dir / "codex-windows-sandbox-setup-x86_64-pc-windows-msvc.exe").write_text(
+        "setup\n"
+    )
+
+    staged = script.stage_python_runtime_package(
+        tmp_path / "runtime-stage",
+        "1.2.3",
+        bundle_dir,
+    )
+    bin_dir = staged / "src" / "codex_cli_bin" / "bin"
+
+    assert (bin_dir / "codex.exe").read_text() == "codex\n"
+    assert (bin_dir / "codex-command-runner.exe").read_text() == "runner\n"
+    assert (bin_dir / "codex-windows-sandbox-setup.exe").read_text() == "setup\n"
+
+
+def test_stage_runtime_release_fails_for_missing_required_file(
+    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+    script = _load_update_script_module()
+    monkeypatch.setattr(script.platform, "system", lambda: "Windows")
+    bundle_dir = tmp_path / "bundle"
+    bundle_dir.mkdir()
+    (bundle_dir / "codex.exe").write_text("codex\n")
+
+    with pytest.raises(RuntimeError, match="codex-command-runner.exe"):
+        script.stage_python_runtime_package(
+            tmp_path / "runtime-stage",
+            "1.2.3",
+            bundle_dir,
+        )
+
+
+def test_runtime_package_helpers_return_packaged_paths(tmp_path: Path) -> None:
+    script = _load_update_script_module()
+    bundle_dir = tmp_path / "bundle"
+    bundle_dir.mkdir()
+    (bundle_dir / "codex").write_text("fake codex\n")
+    staged = script.stage_python_runtime_package(
+        tmp_path / "runtime-stage",
+        "1.2.3",
+        bundle_dir,
+    )
+
+    runtime_module = _load_runtime_package_module(staged)
+
+    assert runtime_module.PACKAGE_NAME == "openai-codex-cli-bin"
+    assert runtime_module.bundled_bin_dir() == staged / "src" / "codex_cli_bin" / "bin"
+    assert runtime_module.bundled_runtime_files() == (
+        staged / "src" / "codex_cli_bin" / "bin" / "codex",
+    )
+    assert runtime_module.bundled_codex_path() == (
+        staged / "src" / "codex_cli_bin" / "bin" / "codex"
+    )
+
+
+def test_runtime_package_helpers_report_missing_binary(tmp_path: Path) -> None:
+    script = _load_update_script_module()
+    bundle_dir = tmp_path / "bundle"
+    bundle_dir.mkdir()
+    (bundle_dir / "codex").write_text("fake codex\n")
+    staged = script.stage_python_runtime_package(
+        tmp_path / "runtime-stage",
+        "1.2.3",
+        bundle_dir,
+    )
+    (staged / "src" / "codex_cli_bin" / "bin" / "codex").unlink()
+
+    runtime_module = _load_runtime_package_module(staged)
+
+    with pytest.raises(FileNotFoundError, match="openai-codex-cli-bin"):
+        runtime_module.bundled_codex_path()
+
+
+def test_stage_sdk_release_injects_exact_runtime_pin_and_versions(
+    tmp_path: Path,
+) -> None:
+    script = _load_update_script_module()
+    staged = script.stage_python_sdk_package(
+        tmp_path / "sdk-stage",
+        "0.2.1-beta.2",
+        "1.2.3-alpha.4",
+    )
 
     pyproject = (staged / "pyproject.toml").read_text()
-    assert 'version = "0.2.1"' in pyproject
-    assert '"codex-cli-bin==1.2.3"' in pyproject
+    assert 'name = "openai-codex"' in pyproject
+    assert 'version = "0.2.1b2"' in pyproject
+    assert '"openai-codex-cli-bin==1.2.3a4"' in pyproject
+    assert (
+        '__version__ = "0.2.1b2"'
+        in (staged / "src" / "codex_app_server" / "__init__.py").read_text()
+    )
+    assert (
+        'client_version: str = "0.2.1b2"'
+        in (staged / "src" / "codex_app_server" / "client.py").read_text()
+    )
     assert not any((staged / "src" / "codex_app_server").glob("bin/**"))
 
 
@@ -329,7 +504,7 @@ def test_stage_sdk_runs_type_generation_before_staging(tmp_path: Path) -> None:
         return tmp_path / "sdk-stage"
 
     def fake_stage_runtime_package(
-        _staging_dir: Path, _runtime_version: str, _runtime_binary: Path
+        _staging_dir: Path, _runtime_version: str, _runtime_bundle_dir: Path
     ) -> Path:
         raise AssertionError("runtime staging should not run for stage-sdk")
 
@@ -350,14 +525,15 @@ def test_stage_sdk_runs_type_generation_before_staging(tmp_path: Path) -> None:
 
 def test_stage_runtime_stages_binary_without_type_generation(tmp_path: Path) -> None:
     script = _load_update_script_module()
-    fake_binary = tmp_path / script.runtime_binary_name()
-    fake_binary.write_text("fake codex\n")
+    bundle_dir = tmp_path / "bundle"
+    bundle_dir.mkdir()
+    (bundle_dir / script.runtime_binary_name()).write_text("fake codex\n")
     calls: list[str] = []
     args = script.parse_args(
         [
             "stage-runtime",
             str(tmp_path / "runtime-stage"),
-            str(fake_binary),
+            str(bundle_dir),
             "--runtime-version",
             "1.2.3",
         ]
@@ -372,7 +548,7 @@ def test_stage_runtime_stages_binary_without_type_generation(tmp_path: Path) ->
         raise AssertionError("sdk staging should not run for stage-runtime")
 
     def fake_stage_runtime_package(
-        _staging_dir: Path, _runtime_version: str, _runtime_binary: Path
+        _staging_dir: Path, _runtime_version: str, _runtime_bundle_dir: Path
     ) -> Path:
         calls.append("stage_runtime")
         return tmp_path / "runtime-stage"