test(langgraph): skip async interrupt tests on Python 3.10

Fixes #6956
Fixes #8579

When parallel tasks interrupt, resuming one leaves its old `__interrupt__`
write in the open superstep. `get_state()` treated that write as pending
even after the task finished, so the answered question reappeared.

Use `read_task_statuses()` for execution, state reads, and resume checks.
An output write marks a task finished; `RESUME` alone does not, because
the task may have interrupted again. Record `NO_WRITES` when a resumed
task completes without output, so it isn't run again.

Latest-state reads now omit interrupts from finished tasks. History and
explicit checkpoint reads still show the last recorded interrupt per
task. A task paused at its second interrupt appears in `next` with
`result=None`. `Command(resume=value)` without an id now raises when
more than one interrupt is pending, including in a subgraph.

Older checkpoints where a resumed task finished without output may
still appear unfinished. On SQLite and Postgres, insert-ignore can
leave an old `RESUME` value for a finished task; that task does not
run again.

Tests: `tests/test_interrupt_state.py` (sync and async).
`make format`, `make lint`; memory/SQLite: 2075 passed, 4 skipped;
Postgres 16: 3659 passed, 6 skipped.

CLAUDE.md

@@ -1,65 +0,0 @@
-# AGENTS Instructions
-
-This repository is a monorepo. Each library lives in a subdirectory under `libs/`.
-
-<corridor>
-
-## Corridor security analysis
-
-Before generating or modifying code, create a plan and use Corridor's `analyzePlan` tool to analyze it. Apply the resulting security guidance before writing code.
-
-</corridor>
-
-When you modify code in any library, run the following commands in that library's directory before creating a pull request:
-
-- `make format` – run code formatters
-- `make lint` – run the linter
-- `make test` – execute the test suite
-
-To run a particular test file or to pass additional pytest options you can specify the `TEST` variable:
-
-```
-TEST=path/to/test.py make test
-```
-
-Other pytest arguments can also be supplied inside the `TEST` variable.
-
-## Libraries
-
-The repository contains several Python and JavaScript/TypeScript libraries.
-Below is a high-level overview:
-
-- **checkpoint** – base interfaces for LangGraph checkpointers.
-- **checkpoint-postgres** – Postgres implementation of the checkpoint saver.
-- **checkpoint-sqlite** – SQLite implementation of the checkpoint saver.
-- **cli** – official command-line interface for LangGraph.
-- **langgraph** – core framework for building stateful, multi-actor agents.
-- **prebuilt** – high-level APIs for creating and running agents and tools.
-- **sdk-js** – JS/TS SDK for interacting with the LangGraph REST API.
-- **sdk-py** – Python SDK for the LangGraph Server API.
-
-### Dependency map
-
-The diagram below lists downstream libraries for each production dependency as
-declared in that library's `pyproject.toml` (or `package.json`).
-
-```text
-checkpoint
-├── checkpoint-postgres
-├── checkpoint-sqlite
-├── prebuilt
-└── langgraph
-
-prebuilt
-└── langgraph
-
-sdk-py
-├── langgraph
-└── cli
-
-sdk-js (standalone)
-```
-
-Changes to a library may impact all of its dependents shown above.
-
-- Do NOT use Sphinx-style double backtick formatting (` ``code`` `). Use single backticks (`` `code` ``) for inline code references in docstrings and comments.

libs/cli/README.md

@@ -103,6 +103,8 @@ The CLI uses a `langgraph.json` configuration file with these key settings:
 }
 ```
 
+Git dependencies should use credential-free URLs. The CLI conservatively scans direct `langgraph.json` dependencies, common Python package files, uv project and lock files, and common Node.js package and lock files for HTTP Git URLs with userinfo. This check is not exhaustive: generated Docker builds can copy other files, including nested requirement or constraint files, into image layers without scanning them. For private dependencies, provide short-lived credentials through your build environment's secret-backed Git credential helper. Do not store credentials in copied files such as `langgraph.json` or `pip_config_file`.
+
 See the [full documentation](https://reference.langchain.com/python/langgraph-cli) for detailed configuration options.
 
 ## Development

libs/cli/langgraph_cli/__init__.py

@@ -1 +1 @@
-__version__ = "0.4.31"
+__version__ = "0.4.32"

libs/cli/langgraph_cli/config.py

@@ -6,6 +6,7 @@ import re
 import shlex
 import textwrap
 from collections import Counter
+from collections.abc import Iterable
 from typing import Literal, NamedTuple
 
 import click
@@ -36,6 +37,10 @@ DISALLOWED_BUILD_COMMAND_CHARS = [
 # This blocks background execution (cmd &) while allowing command
 # chaining (cmd1 && cmd2) which is common in build commands.
 _SINGLE_AMPERSAND_RE = re.compile(r"(?<!&)&(?:&&)*(?!&)")
+_GIT_HTTP_AUTHORITY_RES = (
+    re.compile(r"git\+https?://(?P<authority>[^/\s\"']+)", re.I),
+    re.compile(r"\bgit\s*=\s*[\"']https?://(?P<authority>[^/\s\"']+)", re.I),
+)
 _API_VERSION_PATTERN = re.compile(
     r"^(?P<major>\d+)"
     r"(?:\.(?P<minor>\d+))?"
@@ -78,6 +83,62 @@ def has_disallowed_build_command_content(command: str) -> bool:
     return False
 
 
+def _has_git_http_url_userinfo(dependency: str) -> bool:
+    """Check whether a Git HTTP URL contains userinfo."""
+    return any(
+        "@" in match.group("authority")
+        for pattern in _GIT_HTTP_AUTHORITY_RES
+        for match in pattern.finditer(dependency)
+    )
+
+
+def _validate_git_http_url_userinfo(
+    values: Iterable[str], *, source: pathlib.Path | None = None
+) -> None:
+    """Reject credential-bearing Git HTTP URLs without echoing their values."""
+    if not any(_has_git_http_url_userinfo(value) for value in values):
+        return
+    message = (
+        "Git dependency URLs must not contain credentials or other URL "
+        "userinfo because generated Dockerfiles and image layers can retain "
+        "them. Use a credential-free Git URL and provide short-lived "
+        "credentials through your build environment's secret-backed Git "
+        "credential helper."
+    )
+    if source is not None:
+        message += f" Found in: {source}"
+    raise click.UsageError(message)
+
+
+def _validate_git_http_url_userinfo_files(paths: Iterable[pathlib.Path]) -> None:
+    """Reject credential-bearing Git HTTP URLs in dependency files."""
+    for path in paths:
+        path = path.resolve()
+        if not path.is_file():
+            continue
+        try:
+            contents = path.read_text(encoding="utf-8", errors="replace")
+        except OSError:
+            raise click.UsageError(
+                f"Could not inspect dependency file for embedded credentials: {path}"
+            ) from None
+        _validate_git_http_url_userinfo([contents], source=path)
+
+
+def _validate_local_dependency_files(config_path: pathlib.Path, config: Config) -> None:
+    """Validate dependency files copied into a non-uv Python image."""
+    paths: list[pathlib.Path] = []
+    for dependency in config["dependencies"]:
+        if not isinstance(dependency, str) or not dependency.startswith("."):
+            continue
+        root = (config_path.parent / dependency).resolve()
+        paths.extend(
+            root / name
+            for name in ("requirements.txt", "pyproject.toml", "setup.py", "setup.cfg")
+        )
+    _validate_git_http_url_userinfo_files(paths)
+
+
 MIN_PYTHON_VERSION = "3.11"
 DEFAULT_PYTHON_VERSION = "3.11"
 
@@ -320,7 +381,9 @@ def _get_source_kind(config: Config) -> str | None:
     return kind if isinstance(kind, str) else None
 
 
-def validate_config(config: Config) -> Config:
+def validate_config(
+    config: Config, *, source_path: pathlib.Path | None = None
+) -> Config:
     """Validate a configuration dictionary."""
 
     graphs = config.get("graphs", {})
@@ -415,6 +478,15 @@ def validate_config(config: Config) -> Config:
                 '  "source": {"kind": "uv", "root": ".."}'
             )
 
+    _validate_git_http_url_userinfo(
+        (
+            dependency
+            for dependency in config["dependencies"]
+            if isinstance(dependency, str)
+        ),
+        source=source_path,
+    )
+
     source = config.get("source")
     source_kind = _get_source_kind(config)
     if source is not None and not isinstance(source, dict):
@@ -609,7 +681,7 @@ def validate_config_file(config_path: pathlib.Path) -> Config:
     """Load and validate a configuration file."""
     with open(config_path) as f:
         config = json.load(f)
-    validated = validate_config(config)
+    validated = validate_config(config, source_path=config_path.resolve())
     # Enforce the package.json doesn't enforce an
     # incompatible Node.js version
     if validated.get("node_version"):
@@ -1280,6 +1352,7 @@ def python_config_to_docker(
             api_version=api_version,
             build_tools_to_uninstall=build_tools_to_uninstall,
         )
+    _validate_local_dependency_files(config_path, config)
     if pip_installer == "auto":
         if _image_supports_uv(base_image):
             pip_installer = "uv"
@@ -1490,7 +1563,18 @@ def node_config_to_docker(
 ) -> tuple[str, dict[str, str]]:
     # Calculate paths for monorepo support
     install_root = (
-        pathlib.Path(build_context).resolve() if build_context else config_path.parent
+        pathlib.Path(build_context).resolve()
+        if build_context
+        else config_path.parent.resolve()
+    )
+    config_root = config_path.parent.resolve()
+    dependency_roots = (
+        (install_root, config_root) if install_root != config_root else (install_root,)
+    )
+    _validate_git_http_url_userinfo_files(
+        root / name
+        for root in dependency_roots
+        for name in ("package.json", "package-lock.json", "yarn.lock", "pnpm-lock.yaml")
     )
     install_cmd = install_command or _get_node_pm_install_cmd(install_root)
     if build_context:

libs/cli/langgraph_cli/exec.py

@@ -1,12 +1,18 @@
 import asyncio
 import signal
 import sys
-from collections.abc import Callable
+from collections.abc import Callable, Coroutine
 from contextlib import contextmanager
-from typing import cast
+from typing import Any, Protocol, TypeVar, cast
 
 import click.exceptions
 
+_T = TypeVar("_T")
+
+
+class CommandRunner(Protocol):
+    def run(self, coro: Coroutine[Any, Any, _T]) -> _T: ...
+
 
 @contextmanager
 def Runner():

libs/cli/langgraph_cli/host_backend.py

@@ -2,18 +2,125 @@
 
 from __future__ import annotations
 
-from typing import Any
+from dataclasses import dataclass
+from typing import Any, Literal
+from urllib.parse import urlparse
 
 import click
 import httpx
 
+CLOUD_CONTROL_PLANE_URL = "https://api.host.langchain.com"
+CLOUD_DASHBOARD_URL = "https://smith.langchain.com"
+CLOUD_DOMAIN = "langchain.com"
+CLOUD_API_HOST = "api.smith.langchain.com"
+CLOUD_CONTROL_PLANE_HOST = "api.host.langchain.com"
+CLOUD_DASHBOARD_HOST = "smith.langchain.com"
+CONTROL_PLANE_PATH = "/api-host"
+LANGSMITH_API_PATHS = ("/api/v1", "/api")
+LOCAL_HOSTNAMES = ("localhost", "127.0.0.1")
+MAX_PAGE_SIZE = 100
+SourceName = Literal["internal_docker", "internal_source", "external_docker"]
+
+
+@dataclass(frozen=True, slots=True)
+class ControlPlaneEndpoints:
+    control_plane_url: str
+    dashboard_url: str
+
+    @classmethod
+    def resolve(
+        cls, host_url: str | None, langsmith_endpoint: str | None
+    ) -> ControlPlaneEndpoints:
+        if host_url:
+            return cls.from_control_plane_url(host_url)
+        if langsmith_endpoint:
+            return cls.from_langsmith_endpoint(langsmith_endpoint)
+        return cls(CLOUD_CONTROL_PLANE_URL, CLOUD_DASHBOARD_URL)
+
+    @property
+    def is_cloud(self) -> bool:
+        hostname = urlparse(self.control_plane_url).hostname or ""
+        return hostname == CLOUD_CONTROL_PLANE_HOST or hostname.endswith(
+            f".{CLOUD_CONTROL_PLANE_HOST}"
+        )
+
+    @classmethod
+    def from_control_plane_url(cls, url: str) -> ControlPlaneEndpoints:
+        control_plane_url = url.rstrip("/")
+        hostname = urlparse(control_plane_url).hostname or ""
+        if control_plane_url.endswith(CONTROL_PLANE_PATH):
+            return cls(control_plane_url, control_plane_url[: -len(CONTROL_PLANE_PATH)])
+        if hostname in LOCAL_HOSTNAMES:
+            return cls(control_plane_url, control_plane_url)
+        return cls(control_plane_url, _cloud_dashboard_for(hostname))
+
+    @classmethod
+    def from_langsmith_endpoint(cls, endpoint: str) -> ControlPlaneEndpoints:
+        parsed = urlparse(endpoint.rstrip("/"))
+        hostname = parsed.hostname or ""
+        if _is_cloud_host(hostname):
+            return cls.from_control_plane_url(
+                f"https://{_cloud_control_plane_host_for(hostname)}"
+            )
+        root = f"{parsed.scheme}://{parsed.netloc}{_without_api_path(parsed.path)}"
+        return cls(f"{root}{CONTROL_PLANE_PATH}", root)
+
+
+def _is_cloud_host(hostname: str) -> bool:
+    return hostname == CLOUD_DOMAIN or hostname.endswith(f".{CLOUD_DOMAIN}")
+
+
+def _cloud_control_plane_host_for(langsmith_api_host: str) -> str:
+    if langsmith_api_host.endswith(f".{CLOUD_API_HOST}"):
+        region = langsmith_api_host[: -len(CLOUD_API_HOST)]
+        return f"{region}{CLOUD_CONTROL_PLANE_HOST}"
+    return CLOUD_CONTROL_PLANE_HOST
+
+
+def _cloud_dashboard_for(control_plane_host: str) -> str:
+    if control_plane_host.endswith(f".{CLOUD_CONTROL_PLANE_HOST}"):
+        region = control_plane_host[: -len(CLOUD_CONTROL_PLANE_HOST) - 1]
+        return f"https://{region}.{CLOUD_DASHBOARD_HOST}"
+    return CLOUD_DASHBOARD_URL
+
+
+def _without_api_path(path: str) -> str:
+    for api_path in LANGSMITH_API_PATHS:
+        if path.endswith(api_path):
+            return path[: -len(api_path)]
+    return path
+
+
+def _resources(payload: object) -> list[dict[str, Any]]:
+    if not isinstance(payload, dict):
+        return []
+    resources = payload.get("resources")
+    if not isinstance(resources, list):
+        return []
+    return [item for item in resources if isinstance(item, dict)]
+
 
 class HostBackendError(click.ClickException):
     """Raised when the host backend returns an error response."""
 
-    def __init__(self, message: str, status_code: int | None = None):
+    def __init__(
+        self,
+        message: str,
+        status_code: int | None = None,
+        detail: str | None = None,
+    ):
         super().__init__(message)
         self.status_code = status_code
+        self.detail = detail
+
+
+def _error_detail(response: httpx.Response) -> str | None:
+    try:
+        body = response.json()
+    except ValueError:
+        return None
+    detail = body.get("detail") if isinstance(body, dict) else None
+    return detail if isinstance(detail, str) else None
 
 
 class HostBackendClient:
@@ -24,24 +131,37 @@ class HostBackendClient:
         base_url: str,
         api_key: str,
         tenant_id: str | None = None,
+        *,
+        transport: httpx.BaseTransport | None = None,
     ):
         if not base_url:
             raise click.UsageError("Host backend URL is required")
-        transport = httpx.HTTPTransport(retries=3)
         headers: dict[str, str] = {
             "X-Api-Key": api_key,
             "Accept": "application/json",
         }
         if tenant_id:
             headers["X-Tenant-ID"] = tenant_id
-        self._base_url = base_url.rstrip("/")
+        self._endpoints = ControlPlaneEndpoints.from_control_plane_url(base_url)
+        self._base_url = self._endpoints.control_plane_url
         self._client = httpx.Client(
             base_url=self._base_url,
             headers=headers,
-            transport=transport,
+            transport=transport or httpx.HTTPTransport(retries=3),
             timeout=30,
         )
 
+    @property
+    def base_url(self) -> str:
+        return self._base_url
+
+    @property
+    def endpoints(self) -> ControlPlaneEndpoints:
+        return self._endpoints
+
+    def set_tenant(self, tenant_id: str) -> None:
+        self._client.headers["X-Tenant-ID"] = tenant_id
+
     def _request(
         self,
         method: str,
@@ -53,10 +173,12 @@ class HostBackendClient:
             resp = self._client.request(method, path, json=payload, params=params)
             resp.raise_for_status()
         except httpx.HTTPStatusError as err:
-            detail = err.response.text or str(err.response.status_code)
+            detail = _error_detail(err.response)
+            reason = detail or err.response.text or str(err.response.status_code)
             raise HostBackendError(
-                f"{method} {path} failed with status {err.response.status_code}: {detail}",
+                f"{method} {path} failed with status {err.response.status_code}: {reason}",
                 status_code=err.response.status_code,
+                detail=detail,
             ) from None
         except httpx.TransportError as err:
             raise HostBackendError(str(err)) from None
@@ -72,30 +194,52 @@ class HostBackendClient:
 
     def create_deployment(
         self,
-        name: str,
-        deployment_type: str,
-        source: str,
-        config_path: str | None = None,
+        *,
+        name: str | None,
+        source: SourceName,
+        source_config: dict[str, object],
+        source_revision_config: dict[str, object],
         secrets: list[dict[str, str]] | None = None,
+        agent: dict[str, str] | None = None,
     ) -> dict[str, Any]:
-        """Create a deployment."""
         payload: dict[str, Any] = {
-            "name": name,
             "source": source,
-            "source_config": {"deployment_type": deployment_type},
-            "source_revision_config": {},
+            "source_config": source_config,
+            "source_revision_config": source_revision_config,
         }
-        if source == "internal_source" and config_path:
-            payload["source_revision_config"]["langgraph_config_path"] = config_path
+        if agent is not None:
+            payload["agent"] = agent
+        else:
+            payload["name"] = name
         if secrets is not None:
             payload["secrets"] = secrets
         return self._request("POST", "/v2/deployments", payload)
 
-    def list_deployments(self, name_contains: str = "") -> dict[str, Any]:
-        return self._request(
-            "GET",
-            "/v2/deployments",
-            params={"name_contains": name_contains},
+    def list_deployments(
+        self,
+        *,
+        name: str | None = None,
+        name_contains: str | None = None,
+        limit: int | None = None,
+        agent_id: str | None = None,
+        agent_environment: str | None = None,
+    ) -> list[dict[str, Any]]:
+        given = (
+            ("name", name),
+            ("name_contains", name_contains),
+            ("limit", limit),
+            ("agent_id", agent_id),
+            ("agent_environment", agent_environment),
+        )
+        params = {key: value for key, value in given if value is not None}
+        return _resources(self._request("GET", "/v2/deployments", params=params))
+
+    def get_listener(self, listener_id: str) -> dict[str, Any]:
+        return self._request("GET", f"/v2/listeners/{listener_id}")
+
+    def list_listeners(self) -> list[dict[str, Any]]:
+        return _resources(
+            self._request("GET", "/v2/listeners", params={"limit": MAX_PAGE_SIZE})
         )
 
     def get_deployment(self, deployment_id: str) -> dict[str, Any]:
@@ -121,22 +265,21 @@ class HostBackendClient:
         self,
         deployment_id: str,
         image_uri: str,
+        *,
+        revision_source: SourceName | None,
         secrets: list[dict[str, str]] | None = None,
         tracked_packages: list[str] | None = None,
     ) -> dict[str, Any]:
         payload: dict[str, Any] = {
-            "revision_source": "internal_docker",
             "source_revision_config": {"image_uri": image_uri},
         }
+        if revision_source is not None:
+            payload["revision_source"] = revision_source
         if tracked_packages:
             payload["tracked_packages"] = tracked_packages
         if secrets is not None:
             payload["secrets"] = secrets
-        return self._request(
-            "PATCH",
-            f"/v2/deployments/{deployment_id}",
-            payload,
-        )
+        return self._request("PATCH", f"/v2/deployments/{deployment_id}", payload)
 
     def update_deployment_internal_source(
         self,
@@ -171,10 +314,15 @@ class HostBackendClient:
             payload["secrets"] = secrets
         return self._request("PATCH", f"/v2/deployments/{deployment_id}", payload)
 
-    def list_revisions(self, deployment_id: str, limit: int = 1) -> dict[str, Any]:
-        return self._request(
-            "GET",
-            f"/v2/deployments/{deployment_id}/revisions?limit={limit}",
+    def list_revisions(
+        self, deployment_id: str, limit: int = 1
+    ) -> list[dict[str, Any]]:
+        return _resources(
+            self._request(
+                "GET",
+                f"/v2/deployments/{deployment_id}/revisions",
+                params={"limit": limit},
+            )
         )
 
     def get_revision(self, deployment_id: str, revision_id: str) -> dict[str, Any]:

libs/cli/langgraph_cli/image_reference.py

@@ -0,0 +1,35 @@
+from __future__ import annotations
+
+from dataclasses import dataclass, replace
+
+DIGEST_SEPARATOR = "@sha256:"
+DIGEST_MARKER = "@"
+TAG_SEPARATOR = ":"
+PATH_SEPARATOR = "/"
+
+
+@dataclass(frozen=True, slots=True)
+class ImageReference:
+    repository: str
+    tag: str | None = None
+
+    @classmethod
+    def parse(cls, reference: str) -> ImageReference:
+        if DIGEST_MARKER in reference:
+            raise ValueError(f"{reference!r} carries a digest and cannot be tagged")
+        path_start = reference.rfind(PATH_SEPARATOR) + 1
+        name, separator, tag = reference[path_start:].partition(TAG_SEPARATOR)
+        if not separator:
+            return cls(reference)
+        return cls(reference[:path_start] + name, tag)
+
+    def with_tag(self, tag: str) -> ImageReference:
+        return replace(self, tag=tag)
+
+    def matches_digest(self, repo_digest: str) -> bool:
+        return repo_digest.startswith(f"{self.repository}{DIGEST_SEPARATOR}")
+
+    def __str__(self) -> str:
+        if self.tag is None:
+            return self.repository
+        return f"{self.repository}{TAG_SEPARATOR}{self.tag}"

libs/cli/langgraph_cli/schemas.py

@@ -650,7 +650,8 @@ class Config(TypedDict, total=False):
 
     pip_config_file: str | None
     """Optional. Path to a pip config file (e.g., "/etc/pip.conf" or "pip.ini") for controlling
-    package installation (custom indices, credentials, etc.).
+    package installation (custom indices, timeouts, etc.). The file is copied into the
+    generated image, so it must not contain credentials or other secrets.
 
     Only relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.
     """
@@ -689,6 +690,9 @@ class Config(TypedDict, total=False):
       - "." or "./src" if you have a local Python package
       - str (aka "anthropic") for a PyPI package
       - "git+https://github.com/org/repo.git@main" for a Git-based package
+    Git HTTP URLs must not contain userinfo such as a username or token. For private
+    dependencies, provide short-lived credentials through the build environment's
+    secret-backed Git credential helper.
     Defaults to an empty list, meaning no additional packages installed beyond your base environment.
 
     This field is not supported when `source.kind` is `uv`.

libs/cli/langgraph_cli/uv_lock.py

@@ -880,6 +880,7 @@ def python_config_to_docker_uv_lock(
         _get_node_pm_install_cmd,
         _get_pip_cleanup_lines,
         _image_supports_uv,
+        _validate_git_http_url_userinfo_files,
         docker_tag,
     )
 
@@ -890,11 +891,20 @@ def python_config_to_docker_uv_lock(
         )
 
     config_root = config_path.parent.resolve()
+    source_root = config["source"].get("root", ".")
+    project_root = (config_root / source_root).resolve()
+    _validate_git_http_url_userinfo_files(
+        [project_root / "pyproject.toml", project_root / "uv.lock"]
+    )
+
     install_cmd = "uv pip install --system"
     _, global_reqs_pip_install, pip_config_file_str = _build_python_install_commands(
         config, install_cmd
     )
     plan = _plan_uv_lock_workspace(config_path, config)
+    _validate_git_http_url_userinfo_files(
+        package.pyproject_path for package in plan.install_order
+    )
 
     _update_uv_lock_graph_paths(config_path, config, plan)
     for section, key in [

libs/cli/schemas/schema.json

@@ -28,7 +28,7 @@
                   "type": "null"
                 }
               ],
-              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, credentials, etc.).\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
+              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, timeouts, etc.). The file is copied into the\ngenerated image, so it must not contain credentials or other secrets.\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
             },
             "_INTERNAL_docker_tag": {
               "anyOf": [
@@ -270,7 +270,7 @@
                   "type": "null"
                 }
               ],
-              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, credentials, etc.).\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
+              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, timeouts, etc.). The file is copied into the\ngenerated image, so it must not contain credentials or other secrets.\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
             },
             "_INTERNAL_docker_tag": {
               "anyOf": [

libs/cli/schemas/schema.v0.json

@@ -28,7 +28,7 @@
                   "type": "null"
                 }
               ],
-              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, credentials, etc.).\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
+              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, timeouts, etc.). The file is copied into the\ngenerated image, so it must not contain credentials or other secrets.\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
             },
             "_INTERNAL_docker_tag": {
               "anyOf": [
@@ -270,7 +270,7 @@
                   "type": "null"
                 }
               ],
-              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, credentials, etc.).\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
+              "description": "Optional. Path to a pip config file (e.g., \"/etc/pip.conf\" or \"pip.ini\") for controlling\npackage installation (custom indices, timeouts, etc.). The file is copied into the\ngenerated image, so it must not contain credentials or other secrets.\n\nOnly relevant if Python dependencies are installed via pip. If omitted, default pip settings are used.\n"
             },
             "_INTERNAL_docker_tag": {
               "anyOf": [

libs/cli/tests/unit_tests/cli/test_cli.py

@@ -382,20 +382,18 @@ def test_deploy_list_command(monkeypatch) -> None:
 
         def list_deployments(self, name_contains: str = ""):
             captured["name_contains"] = name_contains
-            return {
-                "resources": [
-                    {
-                        "id": "dep-123",
-                        "name": "alpha",
-                        "source_config": {"custom_url": "https://alpha.example.com"},
-                    },
-                    {
-                        "id": "dep-456",
-                        "name": "beta",
-                        "source_config": {"custom_url": "https://beta.example.com"},
-                    },
-                ]
-            }
+            return [
+                {
+                    "id": "dep-123",
+                    "name": "alpha",
+                    "source_config": {"custom_url": "https://alpha.example.com"},
+                },
+                {
+                    "id": "dep-456",
+                    "name": "beta",
+                    "source_config": {"custom_url": "https://beta.example.com"},
+                },
+            ]
 
     monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
 
@@ -435,7 +433,7 @@ def test_deploy_list_command_no_results(monkeypatch) -> None:
             pass
 
         def list_deployments(self, name_contains: str = ""):
-            return {"resources": []}
+            return []
 
     monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
 
@@ -468,20 +466,18 @@ def test_deploy_revisions_list_command(monkeypatch) -> None:
         def list_revisions(self, deployment_id: str, limit: int = 1):
             captured["deployment_id"] = deployment_id
             captured["limit"] = str(limit)
-            return {
-                "resources": [
-                    {
-                        "id": "rev-123",
-                        "status": "CREATING",
-                        "created_at": "2023-11-07T05:31:56Z",
-                    },
-                    {
-                        "id": "rev-456",
-                        "status": "DEPLOYED",
-                        "created_at": "2023-11-08T10:00:00Z",
-                    },
-                ]
-            }
+            return [
+                {
+                    "id": "rev-123",
+                    "status": "CREATING",
+                    "created_at": "2023-11-07T05:31:56Z",
+                },
+                {
+                    "id": "rev-456",
+                    "status": "DEPLOYED",
+                    "created_at": "2023-11-08T10:00:00Z",
+                },
+            ]
 
     monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
 
@@ -522,7 +518,7 @@ def test_deploy_revisions_list_command_no_results(monkeypatch) -> None:
             pass
 
         def list_revisions(self, deployment_id: str, limit: int = 1):
-            return {"resources": []}
+            return []
 
     monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
 
@@ -555,7 +551,7 @@ def test_deploy_revisions_list_command_with_explicit_limit(monkeypatch) -> None:
         def list_revisions(self, deployment_id: str, limit: int = 1):
             captured["deployment_id"] = deployment_id
             captured["limit"] = str(limit)
-            return {"resources": []}
+            return []
 
     monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
 

libs/cli/tests/unit_tests/test_config.py

@@ -255,6 +255,243 @@ def test_validate_config():
         )
 
 
+@pytest.mark.parametrize(
+    "dependency",
+    [
+        "git+https://user:secret-token@github.com/org/private.git@main",
+        "private-package @ git+http://token@github.com/org/private.git",
+        "git+HTTPS://user%40example.com:secret%2Ftoken@github.com/org/private.git",
+        "git+https://${GIT_TOKEN}@github.com/org/private.git",
+    ],
+)
+def test_validate_config_rejects_git_http_url_userinfo(dependency: str):
+    with pytest.raises(click.UsageError) as exc_info:
+        validate_config(
+            {
+                "python_version": "3.11",
+                "dependencies": [dependency],
+                "graphs": {"agent": "./agent.py:graph"},
+            }
+        )
+
+    message = str(exc_info.value)
+    assert "must not contain credentials or other URL userinfo" in message
+    assert "secret-token" not in message
+    assert "secret%2Ftoken" not in message
+
+
+def test_validate_config_file_reports_source_for_git_http_url_userinfo(
+    tmp_path: pathlib.Path,
+):
+    config_path = tmp_path / "langgraph.json"
+    config_path.write_text(
+        json.dumps(
+            {
+                "python_version": "3.11",
+                "dependencies": ["git+https://secret-token@github.com/org/private.git"],
+                "graphs": {"agent": "./agent.py:graph"},
+            }
+        )
+    )
+
+    with pytest.raises(click.UsageError) as exc_info:
+        validate_config_file(config_path)
+
+    message = str(exc_info.value)
+    assert "secret-token" not in message
+    assert f"Found in: {config_path.resolve()}" in message
+
+
+@pytest.mark.parametrize(
+    "manifest", ["package.json", "package-lock.json", "yarn.lock", "pnpm-lock.yaml"]
+)
+def test_config_to_docker_rejects_git_http_url_userinfo_in_node_files(
+    tmp_path: pathlib.Path, manifest: str
+):
+    config_path = tmp_path / "langgraph.json"
+    config_path.write_text("{}\n")
+    (tmp_path / "agent.js").write_text("export const graph = {};\n")
+    (tmp_path / "package.json").write_text('{"name":"agent"}\n')
+    (tmp_path / manifest).write_text(
+        '"priv": "git+https://user:secret-token@github.com/org/private.git"\n'
+    )
+    config = validate_config(
+        {
+            "node_version": "20",
+            "graphs": {"agent": "./agent.js:graph"},
+        }
+    )
+
+    with pytest.raises(click.UsageError) as exc_info:
+        config_to_docker(
+            config_path,
+            config,
+            base_image="langchain/langgraphjs-api",
+        )
+
+    message = str(exc_info.value)
+    assert "must not contain credentials or other URL userinfo" in message
+    assert "secret-token" not in message
+    assert f"Found in: {(tmp_path / manifest).resolve()}" in message
+
+
+def test_config_to_docker_allows_node_git_urls_without_http_userinfo(
+    tmp_path: pathlib.Path,
+):
+    config_path = tmp_path / "langgraph.json"
+    config_path.write_text("{}\n")
+    (tmp_path / "agent.js").write_text("export const graph = {};\n")
+    (tmp_path / "package.json").write_text(
+        '{"dependencies":{"public":"git+https://github.com/org/public.git"}}\n'
+    )
+    config = validate_config(
+        {
+            "node_version": "20",
+            "graphs": {"agent": "./agent.js:graph"},
+        }
+    )
+
+    docker, _ = config_to_docker(
+        config_path,
+        config,
+        base_image="langchain/langgraphjs-api",
+    )
+
+    assert f"ADD . /deps/{tmp_path.name}" in docker
+
+
+def test_config_to_docker_rejects_git_http_url_userinfo_in_node_workspace(
+    tmp_path: pathlib.Path,
+):
+    config_root = tmp_path / "apps" / "agent"
+    config_root.mkdir(parents=True)
+    config_path = config_root / "langgraph.json"
+    config_path.write_text("{}\n")
+    (config_root / "agent.js").write_text("export const graph = {};\n")
+    (config_root / "package.json").write_text(
+        '{"dependencies":{"priv":"git+https://secret-token@github.com/org/private.git"}}\n'
+    )
+    (tmp_path / "package.json").write_text('{"name":"workspace"}\n')
+    config = validate_config(
+        {
+            "node_version": "20",
+            "graphs": {"agent": "./agent.js:graph"},
+        }
+    )
+
+    with pytest.raises(click.UsageError) as exc_info:
+        config_to_docker(
+            config_path,
+            config,
+            base_image="langchain/langgraphjs-api",
+            build_context=str(tmp_path),
+        )
+
+    message = str(exc_info.value)
+    assert "secret-token" not in message
+    assert f"Found in: {(config_root / 'package.json').resolve()}" in message
+
+
+@pytest.mark.parametrize(
+    "dependency",
+    [
+        "git+https://github.com/org/public.git@main",
+        "private-package @ git+https://github.com/org/private.git@main",
+        "git+ssh://git@github.com/org/private.git@main",
+    ],
+)
+def test_validate_config_allows_git_urls_without_http_userinfo(dependency: str):
+    config = validate_config(
+        {
+            "python_version": "3.11",
+            "dependencies": [dependency],
+            "graphs": {"agent": "./agent.py:graph"},
+        }
+    )
+
+    assert config["dependencies"] == [dependency]
+
+
+def test_config_to_docker_rejects_git_http_url_userinfo_in_requirements(
+    tmp_path: pathlib.Path,
+):
+    config_path = tmp_path / "langgraph.json"
+    config_path.write_text("{}\n")
+    (tmp_path / "agent.py").write_text("graph = object()\n")
+    (tmp_path / "requirements.txt").write_text(
+        "private @ git+https://secret-token@github.com/org/private.git\n"
+    )
+    config = validate_config(
+        {
+            "python_version": "3.11",
+            "dependencies": ["."],
+            "graphs": {"agent": "./agent.py:graph"},
+        }
+    )
+
+    with pytest.raises(click.UsageError) as exc_info:
+        config_to_docker(
+            config_path,
+            config,
+            base_image="langchain/langgraph-api:0.2.47",
+        )
+
+    message = str(exc_info.value)
+    assert "must not contain credentials or other URL userinfo" in message
+    assert "secret-token" not in message
+    assert f"Found in: {(tmp_path / 'requirements.txt').resolve()}" in message
+
+
+@pytest.mark.parametrize("manifest", ["pyproject.toml", "uv.lock"])
+def test_config_to_docker_rejects_git_http_url_userinfo_in_uv_files(
+    tmp_path: pathlib.Path, manifest: str
+):
+    config_path = tmp_path / "langgraph.json"
+    config_path.write_text("{}\n")
+    (tmp_path / "src").mkdir()
+    (tmp_path / "src" / "agent.py").write_text("graph = object()\n")
+    pyproject = textwrap.dedent(
+        """
+        [project]
+        name = "agent"
+        version = "0.1.0"
+        dependencies = ["private"]
+
+        [tool.uv.sources]
+        private = { git = "https://github.com/org/private.git" }
+        """
+    ).strip()
+    uv_lock = "# uv lock file\n"
+    if manifest == "pyproject.toml":
+        pyproject = pyproject.replace(
+            "https://github.com", "https://secret-token@github.com"
+        )
+    else:
+        uv_lock += (
+            'source = { git = "https://secret-token@github.com/org/private.git" }\n'
+        )
+    (tmp_path / "pyproject.toml").write_text(pyproject + "\n")
+    (tmp_path / "uv.lock").write_text(uv_lock)
+    config = validate_config(
+        {
+            "python_version": "3.11",
+            "graphs": {"agent": "./src/agent.py:graph"},
+            "source": {"kind": "uv"},
+        }
+    )
+
+    with pytest.raises(click.UsageError) as exc_info:
+        config_to_docker(
+            config_path,
+            config,
+            base_image="langchain/langgraph-api:0.2.47",
+        )
+
+    message = str(exc_info.value)
+    assert "must not contain credentials or other URL userinfo" in message
+    assert "secret-token" not in message
+
+
 def test_validate_config_image_distro():
     """Test validation of image_distro field."""
     # Valid image_distro values should work

libs/cli/tests/unit_tests/test_deploy_agents.py

@@ -0,0 +1,119 @@
+import json
+from unittest.mock import Mock
+
+import httpx
+import pytest
+from click.testing import CliRunner
+
+import langgraph_cli.deploy as deploy
+from langgraph_cli.cli import cli
+from langgraph_cli.host_backend import HostBackendClient
+
+
+@pytest.fixture
+def deployment_api(monkeypatch, tmp_path):
+    monkeypatch.chdir(tmp_path)
+    monkeypatch.delenv("LANGSMITH_DEPLOYMENT_NAME", raising=False)
+    monkeypatch.setattr(deploy, "_emitter", None)
+    monkeypatch.setattr(deploy, "_no_input", False)
+    (tmp_path / "langgraph.json").write_text(
+        json.dumps({"dependencies": ["."], "graphs": {"agent": "./agent.py:graph"}})
+    )
+    (tmp_path / ".env").write_text("LANGSMITH_DEPLOYMENT_NAME=legacy\n")
+    requests = []
+    state = {"enabled": True, "resources": []}
+
+    def handler(request):
+        requests.append(request)
+        assert request.url.path == "/v2/deployments"
+        if request.method == "GET":
+            if not state["enabled"] and (
+                "agent_id" in request.url.params
+                or "agent_environment" in request.url.params
+            ):
+                return httpx.Response(
+                    400, text="Agent filters are not available for this tenant."
+                )
+            return httpx.Response(200, json={"resources": state["resources"]})
+        assert request.method == "POST"
+        return httpx.Response(200, json={"id": "runtime-id", "name": "server-name"})
+
+    client = HostBackendClient("https://api.example.com", "test-key")
+    client._client.close()
+    client._client = httpx.Client(
+        base_url="https://api.example.com",
+        transport=httpx.MockTransport(handler),
+        headers={"X-Api-Key": "test-key"},
+    )
+    monkeypatch.setattr(deploy, "_create_host_backend_client", lambda *a, **kw: client)
+    monkeypatch.setattr(deploy, "find_tracked_packages", lambda *a: [])
+    remote_build = Mock(return_value=deploy.BuildResult())
+    monkeypatch.setattr(deploy, "_run_remote_build", remote_build)
+    monkeypatch.setattr(deploy, "_resolve_build_mode", lambda flag, **kw: (flag, None))
+    yield state, requests, remote_build
+    client._client.close()
+
+
+AGENT_ARGS = [
+    "deploy",
+    "--agent-id",
+    "customer-support",
+    "--agent-environment",
+    "staging",
+    "--remote",
+    "--no-wait",
+    "--no-input",
+]
+
+
+def test_agent_create(deployment_api, tmp_path, monkeypatch):
+    monkeypatch.setenv("LANGSMITH_DEPLOYMENT_NAME", "legacy")
+    _, requests, build = deployment_api
+    result = CliRunner().invoke(cli, AGENT_ARGS)
+    assert result.exit_code == 0, result.output
+    assert dict(requests[0].url.params) == {
+        "agent_id": "customer-support",
+        "agent_environment": "staging",
+        "limit": "100",
+    }
+    payload = json.loads(requests[1].content)
+    assert payload["agent"] == {
+        "agent_id": "customer-support",
+        "environment": "staging",
+    }
+    assert "name" not in payload
+    assert build.call_args.kwargs["deployment_id"] == "runtime-id"
+    assert "server-name" in result.output
+    assert (tmp_path / ".env").read_text() == "LANGSMITH_DEPLOYMENT_NAME=legacy\n"
+
+
+def test_agent_update(deployment_api):
+    state, requests, build = deployment_api
+    state["resources"] = [{"id": "existing-id", "is_preview": False}]
+    result = CliRunner().invoke(cli, AGENT_ARGS)
+    assert result.exit_code == 0, result.output
+    assert len(requests) == 1
+    assert build.call_args.kwargs["deployment_id"] == "existing-id"
+
+
+def test_agent_rejects_explicit_name(deployment_api, monkeypatch):
+    monkeypatch.setenv("LANGSMITH_DEPLOYMENT_NAME", "legacy")
+    _, requests, _ = deployment_api
+    result = CliRunner().invoke(cli, [*AGENT_ARGS, "--name", "legacy"])
+    assert result.exit_code == 2
+    assert "cannot be combined" in result.output
+    assert not requests
+
+
+def test_agent_lookup_refuses_a_control_plane_that_ignores_the_filter(deployment_api):
+    state, requests, _ = deployment_api
+    state["resources"] = [
+        {"id": "someone-elses", "is_preview": False},
+        {"id": "another", "is_preview": False},
+    ]
+
+    result = CliRunner().invoke(cli, AGENT_ARGS)
+
+    assert result.exit_code != 0
+    assert "does not filter deployments by agent" in result.output
+    assert len(requests) == 1

libs/cli/tests/unit_tests/test_deploy_helpers.py

@@ -13,6 +13,17 @@ import pytest
 
 import langgraph_cli.deploy as deploy_mod
 from langgraph_cli.deploy import (
+    ById,
+    ByName,
+    CustomerRegistrySource,
+    DockerBuildCommand,
+    ExistingDeployment,
+    Listener,
+    ManagedRegistrySource,
+    OnListener,
+    RemoteBuildSource,
+    RequestedPlacement,
+    Unplaced,
     _call_host_backend_with_optional_tenant,
     _create_host_backend_client,
     _docker_config_for_token,
@@ -21,12 +32,14 @@ from langgraph_cli.deploy import (
     _parse_env_from_config,
     _resolve_env_path,
     _resolve_pushed_image_digest,
-    _smith_dashboard_base_url,
+    _select_source,
     _validate_prebuilt_image,
+    find_deployment_by_name,
     normalize_image_tag,
     normalize_name,
 )
 from langgraph_cli.host_backend import HostBackendClient, HostBackendError
+from langgraph_cli.image_reference import ImageReference
 
 
 class TestDockerConfigForToken:
@@ -259,31 +272,29 @@ class TestEnvWithoutDeploymentName:
 
 class TestCallHostBackendWithOptionalTenant:
     def _make_client(self, handler):
-        c = HostBackendClient("https://api.example.com", "test-key")
-        c._client = httpx.Client(
-            base_url="https://api.example.com",
+        c = HostBackendClient(
+            "https://api.example.com",
+            "test-key",
             transport=httpx.MockTransport(handler),
-            headers={"X-Api-Key": "test-key", "Accept": "application/json"},
-            timeout=30,
         )
         return c
 
     def _make_eu_client(self, handler):
-        c = HostBackendClient("https://eu.api.host.langchain.com", "test-key")
-        c._client = httpx.Client(
-            base_url="https://eu.api.host.langchain.com",
+        c = HostBackendClient(
+            "https://eu.api.host.langchain.com",
+            "test-key",
             transport=httpx.MockTransport(handler),
-            headers={"X-Api-Key": "test-key", "Accept": "application/json"},
-            timeout=30,
         )
         return c
 
     def test_success_passes_through(self):
-        client = self._make_client(lambda req: httpx.Response(200, json={"ok": True}))
+        client = self._make_client(
+            lambda req: httpx.Response(200, json={"resources": [{"id": "dep-1"}]})
+        )
         result = _call_host_backend_with_optional_tenant(
             client, lambda c: c.list_deployments()
         )
-        assert result == {"ok": True}
+        assert result == [{"id": "dep-1"}]
 
     def test_403_not_enabled_gives_actionable_error(self):
         detail = (
@@ -334,7 +345,6 @@ class TestCallHostBackendWithOptionalTenant:
         assert exc_info.value.status_code == 403
         assert "smith.langchain.com" in exc_info.value.message
         assert seen_tenant_ids == [None, "workspace-123"]
-        assert client._client.headers["X-Tenant-ID"] == "workspace-123"
 
     def test_other_403_re_raises_original(self):
         client = self._make_client(
@@ -540,60 +550,226 @@ class TestCreateHostBackendClientNoInput:
         assert client is not None
 
 
-class TestSmithDashboardBaseUrl:
-    def test_none_returns_default(self):
-        assert _smith_dashboard_base_url(None) == "https://smith.langchain.com"
+class TestCreateHostBackendClientEndpoint:
+    def test_langsmith_endpoint_from_project_env_selects_self_hosted_control_plane(
+        self, monkeypatch
+    ):
+        monkeypatch.setenv("LANGSMITH_API_KEY", "lsv2_test")
+        monkeypatch.delenv("LANGSMITH_ENDPOINT", raising=False)
 
-    def test_empty_returns_default(self):
-        assert _smith_dashboard_base_url("") == "https://smith.langchain.com"
-
-    def test_prod_host_url(self):
-        assert (
-            _smith_dashboard_base_url("https://api.host.langchain.com")
-            == "https://smith.langchain.com"
+        client = _create_host_backend_client(
+            host_url=None,
+            api_key=None,
+            env_vars={"LANGSMITH_ENDPOINT": "https://smith.example.com/api/v1"},
         )
 
-    def test_dev_host_url(self):
-        assert (
-            _smith_dashboard_base_url("https://dev.api.host.langchain.com")
-            == "https://dev.smith.langchain.com"
+        assert client.base_url == "https://smith.example.com/api-host"
+
+    def test_explicit_host_url_wins_over_langsmith_endpoint(self, monkeypatch):
+        monkeypatch.setenv("LANGSMITH_API_KEY", "lsv2_test")
+        monkeypatch.setenv("LANGSMITH_ENDPOINT", "https://smith.example.com/api/v1")
+
+        client = _create_host_backend_client(
+            host_url="https://custom.host.com", api_key=None, env_vars={}
         )
 
-    def test_eu_host_url(self):
-        assert (
-            _smith_dashboard_base_url("https://eu.api.host.langchain.com")
-            == "https://eu.smith.langchain.com"
+        assert client.base_url == "https://custom.host.com"
+
+
+class TestDockerBuildCommand:
+    @pytest.mark.parametrize(
+        ("machine", "verbose", "expected"),
+        [
+            pytest.param(
+                "x86_64",
+                False,
+                DockerBuildCommand(("docker", "build"), ()),
+                id="amd64_host_builds_natively",
+            ),
+            pytest.param(
+                "arm64",
+                False,
+                DockerBuildCommand(
+                    ("docker", "buildx", "build"),
+                    ("--platform", "linux/amd64", "--load", "--progress=quiet"),
+                ),
+                id="other_hosts_cross_build_quietly",
+            ),
+            pytest.param(
+                "arm64",
+                True,
+                DockerBuildCommand(
+                    ("docker", "buildx", "build"),
+                    ("--platform", "linux/amd64", "--load"),
+                ),
+                id="verbose_cross_build_keeps_progress_output",
+            ),
+        ],
+    )
+    def test_for_host_targets_the_deployment_platform(self, machine, verbose, expected):
+        assert DockerBuildCommand.for_host(machine, verbose=verbose) == expected
+
+
+class TestSelectSource:
+    OPTIONS = {
+        "push_to": None,
+        "image": None,
+        "image_name": None,
+        "tag": None,
+        "remote_build_flag": None,
+        "placement": RequestedPlacement(),
+        "selector": ByName("my-app"),
+    }
+    REPOSITORY = "registry.example.com/app"
+
+    @pytest.mark.parametrize(
+        ("flags", "docker_available", "expected"),
+        [
+            pytest.param(
+                {"push_to": REPOSITORY},
+                True,
+                CustomerRegistrySource(
+                    reference=ImageReference(REPOSITORY, "latest"),
+                    prebuilt_image=None,
+                    requested_placement=RequestedPlacement(),
+                ),
+                id="push_to_selects_the_external_source_with_the_default_tag",
+            ),
+            pytest.param(
+                {"push_to": f"{REPOSITORY}:v2"},
+                True,
+                CustomerRegistrySource(
+                    reference=ImageReference(REPOSITORY, "v2"),
+                    prebuilt_image=None,
+                    requested_placement=RequestedPlacement(),
+                ),
+                id="push_to_keeps_a_tag_given_in_the_reference",
+            ),
+            pytest.param(
+                {"push_to": REPOSITORY, "tag": "v3"},
+                True,
+                CustomerRegistrySource(
+                    reference=ImageReference(REPOSITORY, "v3"),
+                    prebuilt_image=None,
+                    requested_placement=RequestedPlacement(),
+                ),
+                id="tag_flag_composes_with_push_to",
+            ),
+            pytest.param(
+                {"push_to": REPOSITORY, "image": "app:dev"},
+                False,
+                CustomerRegistrySource(
+                    reference=ImageReference(REPOSITORY, "latest"),
+                    prebuilt_image="app:dev",
+                    requested_placement=RequestedPlacement(),
+                ),
+                id="prebuilt_image_is_retagged_for_push_to_without_docker_checks",
+            ),
+            pytest.param(
+                {
+                    "push_to": REPOSITORY,
+                    "placement": RequestedPlacement("listener-1", "agents"),
+                },
+                True,
+                CustomerRegistrySource(
+                    reference=ImageReference(REPOSITORY, "latest"),
+                    prebuilt_image=None,
+                    requested_placement=RequestedPlacement("listener-1", "agents"),
+                ),
+                id="push_to_carries_the_requested_placement",
+            ),
+            pytest.param(
+                {"remote_build_flag": True},
+                True,
+                RemoteBuildSource(),
+                id="remote_flag_selects_the_source_upload",
+            ),
+            pytest.param(
+                {},
+                False,
+                RemoteBuildSource(),
+                id="no_local_docker_falls_back_to_the_source_upload",
+            ),
+            pytest.param(
+                {},
+                True,
+                ManagedRegistrySource(
+                    prebuilt_image=None, image_name=None, tag="latest"
+                ),
+                id="local_docker_selects_the_internal_docker_source",
+            ),
+            pytest.param(
+                {"image": "app:dev", "tag": "v1"},
+                False,
+                ManagedRegistrySource(
+                    prebuilt_image="app:dev", image_name=None, tag="v1"
+                ),
+                id="prebuilt_image_forces_the_internal_docker_source",
+            ),
+        ],
+    )
+    def test_flags_select_one_source(
+        self, monkeypatch, mocker, flags, docker_available, expected
+    ):
+        mocker.patch(
+            "langgraph_cli.deploy._get_emitter", return_value=mocker.MagicMock()
+        )
+        monkeypatch.setattr(
+            deploy_mod,
+            "can_build_locally",
+            lambda: (True, None) if docker_available else (False, "Docker is required"),
         )
 
-    def test_staging_host_url(self):
-        assert (
-            _smith_dashboard_base_url("https://staging.api.host.langchain.com")
-            == "https://staging.smith.langchain.com"
+        assert _select_source(**{**self.OPTIONS, **flags}) == expected
+
+    def test_push_to_build_requires_local_docker(self, monkeypatch):
+        monkeypatch.setattr(
+            deploy_mod, "can_build_locally", lambda: (False, "Docker is required")
         )
 
-    def test_localhost(self):
-        assert (
-            _smith_dashboard_base_url("http://localhost:8080")
-            == "http://localhost:8080"
-        )
+        with pytest.raises(click.UsageError, match="Docker is required"):
+            _select_source(**{**self.OPTIONS, "push_to": self.REPOSITORY})
 
-    def test_localhost_trailing_slash(self):
-        assert (
-            _smith_dashboard_base_url("http://localhost:8080/")
-            == "http://localhost:8080"
-        )
+    @pytest.mark.parametrize(
+        ("flags", "message"),
+        [
+            pytest.param(
+                {"push_to": REPOSITORY, "remote_build_flag": True},
+                "--push-to cannot be combined with --remote.",
+                id="push_to_with_remote",
+            ),
+            pytest.param(
+                {"push_to": f"{REPOSITORY}:v1", "tag": "v2"},
+                "already includes a tag",
+                id="push_to_with_a_tag_and_the_tag_flag",
+            ),
+            pytest.param(
+                {"push_to": f"{REPOSITORY}@sha256:abc"},
+                "not a digest",
+                id="push_to_with_a_digest",
+            ),
+            pytest.param(
+                {"image": "app:dev", "remote_build_flag": True},
+                "--image cannot be combined with --remote builds.",
+                id="image_with_remote",
+            ),
+            pytest.param(
+                {"placement": RequestedPlacement(listener_id="listener-1")},
+                "only apply when creating a deployment with --push-to",
+                id="listener_without_push_to",
+            ),
+            pytest.param(
+                {"placement": RequestedPlacement(k8s_namespace="agents")},
+                "only apply when creating a deployment with --push-to",
+                id="namespace_without_push_to",
+            ),
+        ],
+    )
+    def test_conflicting_flags_are_rejected(self, monkeypatch, flags, message):
+        monkeypatch.setattr(deploy_mod, "can_build_locally", lambda: (True, None))
 
-    def test_127_0_0_1(self):
-        assert (
-            _smith_dashboard_base_url("http://127.0.0.1:3000")
-            == "http://127.0.0.1:3000"
-        )
-
-    def test_unknown_domain_returns_default(self):
-        assert (
-            _smith_dashboard_base_url("https://custom.example.com")
-            == "https://smith.langchain.com"
-        )
+        with pytest.raises(click.UsageError, match=message):
+            _select_source(**{**self.OPTIONS, **flags})
 
 
 class TestResolvePushedImageDigest:
@@ -644,6 +820,16 @@ class TestResolvePushedImageDigest:
         )
         assert out == "us-central1-docker.pkg.dev/proj/repo@sha256:abc123"
 
+    def test_registry_port_without_tag_still_resolves_the_digest(self):
+        runner = self._runner('["localhost:5000/repo@sha256:abc123"]')
+        out = _resolve_pushed_image_digest(
+            runner,
+            remote_image="localhost:5000/repo",
+            docker_config_dir=None,
+            verbose=False,
+        )
+        assert out == "localhost:5000/repo@sha256:abc123"
+
     def test_empty_repodigests_falls_back_with_warning(self, mocker):
         emitter = mocker.MagicMock()
         mocker.patch("langgraph_cli.deploy._get_emitter", return_value=emitter)
@@ -747,3 +933,289 @@ class TestResolvePushedImageDigest:
         frame_locals = captured["coro"].cr_frame.f_locals
         assert "--config" not in frame_locals["args"]
         captured["coro"].close()
+
+
+class TestListener:
+    @pytest.mark.parametrize(
+        ("resource", "expected"),
+        [
+            pytest.param(
+                {
+                    "id": "listener-1",
+                    "compute_id": "prod-cluster",
+                    "compute_config": {"k8s_namespaces": ["agents", "agents-staging"]},
+                },
+                Listener("listener-1", "prod-cluster", ("agents", "agents-staging")),
+                id="reads_id_cluster_and_namespaces",
+            ),
+            pytest.param(
+                {"id": "listener-1", "compute_id": "c", "compute_config": {}},
+                Listener("listener-1", "c", ()),
+                id="missing_namespaces",
+            ),
+            pytest.param(
+                {"id": "listener-1", "compute_id": "c", "compute_config": None},
+                Listener("listener-1", "c", ()),
+                id="null_compute_config",
+            ),
+            pytest.param(
+                {"id": "listener-1"},
+                Listener("listener-1", "", ()),
+                id="only_an_id",
+            ),
+        ],
+    )
+    def test_from_resource_reads_the_control_plane_shape(self, resource, expected):
+        assert Listener.from_resource(resource) == expected
+
+
+ONE_NAMESPACE = Listener("listener-1", "prod-cluster", ("agents",))
+TWO_NAMESPACES = Listener("listener-2", "multi-cluster", ("agents", "agents-staging"))
+NO_NAMESPACE = Listener("listener-3", "broken-cluster", ())
+
+
+class TestRequestedPlacement:
+    @pytest.mark.parametrize(
+        ("request_", "listeners", "expected"),
+        [
+            pytest.param(
+                RequestedPlacement(), (), Unplaced(), id="no_listeners_no_request"
+            ),
+            pytest.param(
+                RequestedPlacement(),
+                (ONE_NAMESPACE,),
+                OnListener("listener-1", "agents"),
+                id="uses_the_only_possible_answer",
+            ),
+            pytest.param(
+                RequestedPlacement(k8s_namespace="agents-staging"),
+                (TWO_NAMESPACES,),
+                OnListener("listener-2", "agents-staging"),
+                id="namespace_alone_picks_the_only_listener",
+            ),
+        ],
+    )
+    def test_resolves_to_a_placement(self, request_, listeners, expected):
+        assert request_.among(listeners) == expected
+
+    @pytest.mark.parametrize(
+        ("request_", "listeners", "message"),
+        [
+            pytest.param(
+                RequestedPlacement(listener_id="listener-1"),
+                (),
+                "no listeners",
+                id="workspace_has_no_listeners",
+            ),
+            pytest.param(
+                RequestedPlacement(),
+                (ONE_NAMESPACE, TWO_NAMESPACES),
+                "--listener-id",
+                id="several_listeners_need_a_choice",
+            ),
+            pytest.param(
+                RequestedPlacement(k8s_namespace="agents"),
+                (ONE_NAMESPACE, TWO_NAMESPACES),
+                "--listener-id",
+                id="namespace_alone_is_ambiguous_with_several_listeners",
+            ),
+            pytest.param(
+                RequestedPlacement(k8s_namespace="agents"),
+                (),
+                "no listeners",
+                id="namespace_without_any_listener",
+            ),
+            pytest.param(
+                RequestedPlacement(),
+                (TWO_NAMESPACES,),
+                "--k8s-namespace",
+                id="several_namespaces_need_a_choice",
+            ),
+        ],
+    )
+    def test_refuses_and_names_the_choices(self, request_, listeners, message):
+        with pytest.raises(click.UsageError, match=message):
+            request_.among(listeners)
+
+    def test_the_error_lists_every_listener_with_its_cluster_and_namespaces(self):
+        with pytest.raises(click.UsageError) as error:
+            RequestedPlacement().among((ONE_NAMESPACE, TWO_NAMESPACES))
+
+        assert "listener-1" in error.value.message
+        assert "prod-cluster" in error.value.message
+        assert "agents-staging" in error.value.message
+
+    @pytest.mark.parametrize(
+        ("placement", "expected"),
+        [
+            pytest.param(Unplaced(), {}, id="unplaced_adds_nothing"),
+            pytest.param(
+                OnListener("listener-1", "agents"),
+                {
+                    "listener_id": "listener-1",
+                    "listener_config": {"k8s_namespace": "agents"},
+                },
+                id="placed_carries_listener_and_namespace",
+            ),
+        ],
+    )
+    def test_source_config_matches_the_control_plane_shape(self, placement, expected):
+        assert placement.source_config() == expected
+
+
+def test_finding_a_deployment_by_name_narrows_the_search_for_every_server_version():
+    seen: dict = {}
+
+    def handler(req: httpx.Request) -> httpx.Response:
+        seen["params"] = dict(req.url.params)
+        return httpx.Response(
+            200,
+            json={"resources": [{"id": "dep-1", "name": "agent", "source": "github"}]},
+        )
+
+    client = HostBackendClient(
+        "https://api.example.com", "key", transport=httpx.MockTransport(handler)
+    )
+
+    found = find_deployment_by_name(client, "agent")
+
+    assert seen["params"] == {
+        "name": "agent",
+        "name_contains": "agent",
+        "limit": "100",
+    }
+    assert found == ExistingDeployment("dep-1", "github")
+
+
+def test_a_server_that_ignores_the_exact_name_filter_never_matches_another_deployment():
+    client = HostBackendClient(
+        "https://api.example.com",
+        "key",
+        transport=httpx.MockTransport(
+            lambda req: httpx.Response(
+                200,
+                json={
+                    "resources": [
+                        {
+                            "id": "dep-other",
+                            "name": "another-teams-agent",
+                            "source": "external_docker",
+                        }
+                    ]
+                },
+            )
+        ),
+    )
+
+    assert find_deployment_by_name(client, "brand-new-agent") is None
+
+
+def test_a_full_page_without_a_match_refuses_to_claim_the_name_is_free():
+    page = [
+        {"id": f"dep-{index}", "name": f"other-agent-{index}"} for index in range(100)
+    ]
+    client = HostBackendClient(
+        "https://api.example.com",
+        "key",
+        transport=httpx.MockTransport(
+            lambda req: httpx.Response(200, json={"resources": page})
+        ),
+    )
+
+    with pytest.raises(click.ClickException, match="--deployment-id"):
+        find_deployment_by_name(client, "brand-new-agent")
+
+
+def test_a_partial_page_without_a_match_means_the_name_is_free():
+    client = HostBackendClient(
+        "https://api.example.com",
+        "key",
+        transport=httpx.MockTransport(
+            lambda req: httpx.Response(
+                200, json={"resources": [{"id": "dep-1", "name": "other"}]}
+            )
+        ),
+    )
+
+    assert find_deployment_by_name(client, "brand-new-agent") is None
+
+
+@pytest.mark.parametrize(
+    "resource",
+    [
+        pytest.param({"compute_id": "c"}, id="no_id"),
+        pytest.param({"id": ""}, id="empty_id"),
+    ],
+)
+def test_a_listener_without_an_id_is_refused(resource):
+    with pytest.raises(HostBackendError, match="without an id"):
+        Listener.from_resource(resource)
+
+
+def test_a_deployment_id_with_listener_flags_is_refused_without_probing_docker(
+    monkeypatch,
+):
+    def explode() -> tuple[bool, str | None]:
+        raise AssertionError("docker must not be probed for an argv-only conflict")
+
+    monkeypatch.setattr(deploy_mod, "can_build_locally", explode)
+
+    with pytest.raises(click.UsageError, match="--deployment-id"):
+        _select_source(
+            push_to="registry.example.com/app",
+            image=None,
+            image_name=None,
+            tag=None,
+            remote_build_flag=None,
+            placement=RequestedPlacement(listener_id="listener-1"),
+            selector=ById("dep-1"),
+        )
+
+
+class TestPlacementOnAKnownListener:
+    @pytest.mark.parametrize(
+        ("request_", "listener", "expected"),
+        [
+            pytest.param(
+                RequestedPlacement(listener_id="listener-1"),
+                ONE_NAMESPACE,
+                OnListener("listener-1", "agents"),
+                id="the_only_namespace_is_used",
+            ),
+            pytest.param(
+                RequestedPlacement(listener_id="listener-2", k8s_namespace="agents"),
+                TWO_NAMESPACES,
+                OnListener("listener-2", "agents"),
+                id="the_chosen_namespace_is_used",
+            ),
+        ],
+    )
+    def test_places_on_the_listener(self, request_, listener, expected):
+        assert request_.on(listener) == expected
+
+    @pytest.mark.parametrize(
+        ("request_", "listener", "message"),
+        [
+            pytest.param(
+                RequestedPlacement(listener_id="listener-2"),
+                TWO_NAMESPACES,
+                "--k8s-namespace",
+                id="several_namespaces_need_a_choice",
+            ),
+            pytest.param(
+                RequestedPlacement(listener_id="listener-2", k8s_namespace="nope"),
+                TWO_NAMESPACES,
+                "does not serve namespace",
+                id="unknown_namespace",
+            ),
+            pytest.param(
+                RequestedPlacement(listener_id="listener-3"),
+                NO_NAMESPACE,
+                "serves no namespaces",
+                id="listener_without_namespaces",
+            ),
+        ],
+    )
+    def test_refuses_and_names_the_namespaces(self, request_, listener, message):
+        with pytest.raises(click.UsageError, match=message):
+            request_.on(listener)

libs/cli/tests/unit_tests/test_host_backend.py

@@ -3,29 +3,16 @@ import json
 import httpx
 import pytest
 
-from langgraph_cli.host_backend import HostBackendClient, HostBackendError
-
-
-@pytest.fixture
-def mock_transport():
-    return httpx.MockTransport(lambda req: httpx.Response(200, json={"ok": True}))
-
-
-@pytest.fixture
-def client(mock_transport):
-    c = HostBackendClient("https://api.example.com", "test-key")
-    c._client = httpx.Client(
-        base_url="https://api.example.com",
-        transport=mock_transport,
-        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
-        timeout=30,
-    )
-    return c
+from langgraph_cli.host_backend import (
+    ControlPlaneEndpoints,
+    HostBackendClient,
+    HostBackendError,
+)
 
 
 def test_constructor_strips_trailing_slash():
     c = HostBackendClient("https://api.example.com/", "key")
-    assert str(c._client.base_url) == "https://api.example.com"
+    assert c.base_url == "https://api.example.com"
 
 
 def test_constructor_empty_url_raises():
@@ -39,12 +26,8 @@ def test_request_sends_headers():
         assert req.headers["accept"] == "application/json"
         return httpx.Response(200, json={"ok": True})
 
-    c = HostBackendClient("https://api.example.com", "test-key")
-    c._client = httpx.Client(
-        base_url="https://api.example.com",
-        transport=httpx.MockTransport(handler),
-        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
-        timeout=30,
+    c = HostBackendClient(
+        "https://api.example.com", "test-key", transport=httpx.MockTransport(handler)
     )
     result = c._request("GET", "/test")
     assert result == {"ok": True}
@@ -56,12 +39,8 @@ def test_request_sends_json_payload():
         assert req.content == b'{"key":"value"}'
         return httpx.Response(200, json={"created": True})
 
-    c = HostBackendClient("https://api.example.com", "test-key")
-    c._client = httpx.Client(
-        base_url="https://api.example.com",
-        transport=httpx.MockTransport(handler),
-        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
-        timeout=30,
+    c = HostBackendClient(
+        "https://api.example.com", "test-key", transport=httpx.MockTransport(handler)
     )
     result = c._request("POST", "/test", {"key": "value"})
     assert result == {"created": True}
@@ -69,25 +48,13 @@ def test_request_sends_json_payload():
 
 def test_request_empty_body_returns_none():
     transport = httpx.MockTransport(lambda req: httpx.Response(200, content=b""))
-    c = HostBackendClient("https://api.example.com", "test-key")
-    c._client = httpx.Client(
-        base_url="https://api.example.com",
-        transport=transport,
-        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
-        timeout=30,
-    )
+    c = HostBackendClient("https://api.example.com", "test-key", transport=transport)
     assert c._request("DELETE", "/test") is None
 
 
 def test_request_http_error_raises():
     transport = httpx.MockTransport(lambda req: httpx.Response(404, text="not found"))
-    c = HostBackendClient("https://api.example.com", "test-key")
-    c._client = httpx.Client(
-        base_url="https://api.example.com",
-        transport=transport,
-        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
-        timeout=30,
-    )
+    c = HostBackendClient("https://api.example.com", "test-key", transport=transport)
     with pytest.raises(HostBackendError, match="404"):
         c._request("GET", "/missing")
 
@@ -96,13 +63,7 @@ def test_request_invalid_json_raises():
     transport = httpx.MockTransport(
         lambda req: httpx.Response(200, content=b"not json")
     )
-    c = HostBackendClient("https://api.example.com", "test-key")
-    c._client = httpx.Client(
-        base_url="https://api.example.com",
-        transport=transport,
-        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
-        timeout=30,
-    )
+    c = HostBackendClient("https://api.example.com", "test-key", transport=transport)
     with pytest.raises(HostBackendError, match="Failed to decode"):
         c._request("GET", "/bad-json")
 
@@ -111,84 +72,20 @@ def test_request_transport_error_raises():
     def handler(req: httpx.Request) -> httpx.Response:
         raise httpx.ConnectError("connection refused")
 
-    c = HostBackendClient("https://api.example.com", "test-key")
-    c._client = httpx.Client(
-        base_url="https://api.example.com",
-        transport=httpx.MockTransport(handler),
-        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
-        timeout=30,
+    c = HostBackendClient(
+        "https://api.example.com", "test-key", transport=httpx.MockTransport(handler)
     )
     with pytest.raises(HostBackendError, match="connection refused"):
         c._request("GET", "/test")
 
 
-def test_create_deployment(client):
-    result = client.create_deployment(
-        name="my-deploy", deployment_type="dev", source="internal_docker"
-    )
-    assert result == {"ok": True}
-
-
-def test_get_deployment(client):
-    result = client.get_deployment("dep-123")
-    assert result == {"ok": True}
-
-
-def test_list_deployments(client):
-    result = client.list_deployments("my-app")
-    assert result == {"ok": True}
-
-
-def test_list_deployments_sends_query_params():
-    def handler(req: httpx.Request) -> httpx.Response:
-        assert req.url.path == "/v2/deployments"
-        assert req.url.params["name_contains"] == "my app"
-        return httpx.Response(200, json={"ok": True})
-
-    c = HostBackendClient("https://api.example.com", "test-key")
-    c._client = httpx.Client(
-        base_url="https://api.example.com",
-        transport=httpx.MockTransport(handler),
-        headers={"X-Api-Key": "test-key", "Accept": "application/json"},
-        timeout=30,
-    )
-    result = c.list_deployments("my app")
-    assert result == {"ok": True}
-
-
-def test_delete_deployment(client):
-    result = client.delete_deployment("dep-123")
-    assert result == {"ok": True}
-
-
-def test_request_push_token(client):
-    result = client.request_push_token("dep-123")
-    assert result == {"ok": True}
-
-
-def test_update_deployment(client):
-    result = client.update_deployment(
-        "dep-123", "image:latest", secrets=[{"name": "KEY", "value": "val"}]
-    )
-    assert result == {"ok": True}
-
-
-def test_update_deployment_no_secrets(client):
-    result = client.update_deployment("dep-123", "image:latest")
-    assert result == {"ok": True}
-
-
 def _capturing_client(captured: dict) -> HostBackendClient:
     def handler(req: httpx.Request) -> httpx.Response:
         captured["body"] = req.read()
         return httpx.Response(200, json={"ok": True})
 
-    c = HostBackendClient("https://api.example.com", "key")
-    c._client = httpx.Client(
-        base_url="https://api.example.com",
-        transport=httpx.MockTransport(handler),
-        headers={"X-Api-Key": "key", "Accept": "application/json"},
-        timeout=30,
+    c = HostBackendClient(
+        "https://api.example.com", "key", transport=httpx.MockTransport(handler)
     )
     return c
 
@@ -199,6 +96,7 @@ def test_update_deployment_forwards_tracked_packages():
     c.update_deployment(
         "dep-123",
         "image:latest",
+        revision_source="internal_docker",
         tracked_packages=["google-adk:1.0.0"],
     )
     body = json.loads(captured["body"])
@@ -209,7 +107,7 @@ def test_update_deployment_forwards_tracked_packages():
 def test_update_deployment_omits_tracked_packages_when_absent():
     captured: dict = {}
     c = _capturing_client(captured)
-    c.update_deployment("dep-123", "image:latest")
+    c.update_deployment("dep-123", "image:latest", revision_source="internal_docker")
     body = json.loads(captured["body"])
     assert "tracked_packages" not in body
 
@@ -241,33 +139,14 @@ def test_update_deployment_internal_source_omits_tracked_packages_when_absent():
     assert "tracked_packages" not in body
 
 
-def test_list_revisions(client):
-    result = client.list_revisions("dep-123", limit=5)
-    assert result == {"ok": True}
-
-
-def test_get_revision(client):
-    result = client.get_revision("dep-123", "rev-456")
-    assert result == {"ok": True}
-
-
-def test_get_build_logs(client):
-    result = client.get_build_logs("proj-1", "rev-1", {"limit": 10})
-    assert result == {"ok": True}
-
-
 def test_get_deploy_logs_all_revisions():
     def handler(req: httpx.Request) -> httpx.Response:
         assert "/v1/projects/proj-1/deploy_logs" in str(req.url)
         assert "/revisions/" not in str(req.url)
         return httpx.Response(200, json={"logs": [{"message": "running"}]})
 
-    c = HostBackendClient("https://api.example.com", "key")
-    c._client = httpx.Client(
-        base_url="https://api.example.com",
-        transport=httpx.MockTransport(handler),
-        headers={"X-Api-Key": "key", "Accept": "application/json"},
-        timeout=30,
+    c = HostBackendClient(
+        "https://api.example.com", "key", transport=httpx.MockTransport(handler)
     )
     result = c.get_deploy_logs("proj-1", {"limit": 10})
     assert result == {"logs": [{"message": "running"}]}
@@ -278,12 +157,520 @@ def test_get_deploy_logs_specific_revision():
         assert "/v1/projects/proj-1/revisions/rev-2/deploy_logs" in str(req.url)
         return httpx.Response(200, json={"logs": []})
 
-    c = HostBackendClient("https://api.example.com", "key")
-    c._client = httpx.Client(
-        base_url="https://api.example.com",
-        transport=httpx.MockTransport(handler),
-        headers={"X-Api-Key": "key", "Accept": "application/json"},
-        timeout=30,
+    c = HostBackendClient(
+        "https://api.example.com", "key", transport=httpx.MockTransport(handler)
     )
     result = c.get_deploy_logs("proj-1", {"limit": 10}, revision_id="rev-2")
     assert result == {"logs": []}
+
+
+def _routing_client(seen: dict) -> HostBackendClient:
+    def handler(req: httpx.Request) -> httpx.Response:
+        seen["method"] = req.method
+        seen["url"] = str(req.url)
+        return httpx.Response(200, json={"ok": True})
+
+    c = HostBackendClient(
+        "https://api.example.com/prefix", "key", transport=httpx.MockTransport(handler)
+    )
+    return c
+
+
+@pytest.mark.parametrize(
+    ("call", "expected_body"),
+    [
+        pytest.param(
+            lambda c: c.create_deployment(
+                name="my-deploy",
+                source="internal_docker",
+                source_config={"deployment_type": "dev"},
+                source_revision_config={},
+            ),
+            {
+                "name": "my-deploy",
+                "source": "internal_docker",
+                "source_config": {"deployment_type": "dev"},
+                "source_revision_config": {},
+            },
+            id="internal_docker_create_omits_secrets_key_when_not_given",
+        ),
+        pytest.param(
+            lambda c: c.create_deployment(
+                name="my-deploy",
+                source="internal_docker",
+                source_config={"deployment_type": "prod"},
+                source_revision_config={},
+                secrets=[{"name": "KEY", "value": "val"}],
+            ),
+            {
+                "name": "my-deploy",
+                "source": "internal_docker",
+                "source_config": {"deployment_type": "prod"},
+                "source_revision_config": {},
+                "secrets": [{"name": "KEY", "value": "val"}],
+            },
+            id="internal_docker_create_forwards_secrets",
+        ),
+        pytest.param(
+            lambda c: c.update_deployment(
+                "dep-123",
+                "registry.example.com/app@sha256:abc",
+                revision_source="internal_docker",
+                secrets=[{"name": "KEY", "value": "val"}],
+            ),
+            {
+                "revision_source": "internal_docker",
+                "source_revision_config": {
+                    "image_uri": "registry.example.com/app@sha256:abc"
+                },
+                "secrets": [{"name": "KEY", "value": "val"}],
+            },
+            id="internal_docker_revision_names_its_source",
+        ),
+        pytest.param(
+            lambda c: c.update_deployment_internal_source(
+                "dep-123",
+                source_tarball_path="tarballs/src.tgz",
+                config_path="langgraph.json",
+                secrets=[],
+                install_command="yarn install",
+                build_command="yarn build",
+            ),
+            {
+                "revision_source": "internal_source",
+                "source_revision_config": {
+                    "source_tarball_path": "tarballs/src.tgz",
+                    "langgraph_config_path": "langgraph.json",
+                },
+                "source_config": {
+                    "install_command": "yarn install",
+                    "build_command": "yarn build",
+                },
+                "secrets": [],
+            },
+            id="internal_source_revision_sends_js_build_commands",
+        ),
+        pytest.param(
+            lambda c: c.update_deployment_internal_source(
+                "dep-123",
+                source_tarball_path="tarballs/src.tgz",
+                config_path="langgraph.json",
+            ),
+            {
+                "revision_source": "internal_source",
+                "source_revision_config": {
+                    "source_tarball_path": "tarballs/src.tgz",
+                    "langgraph_config_path": "langgraph.json",
+                },
+            },
+            id="internal_source_revision_omits_source_config_without_commands",
+        ),
+        pytest.param(
+            lambda c: c.create_deployment(
+                name="agent",
+                source="external_docker",
+                source_config={"resource_spec": {}},
+                source_revision_config={
+                    "image_uri": "registry.example.com/agent@sha256:1"
+                },
+                secrets=[],
+            ),
+            {
+                "name": "agent",
+                "source": "external_docker",
+                "source_config": {"resource_spec": {}},
+                "source_revision_config": {
+                    "image_uri": "registry.example.com/agent@sha256:1"
+                },
+                "secrets": [],
+            },
+            id="create_sends_the_source_configs_as_given",
+        ),
+        pytest.param(
+            lambda c: c.update_deployment(
+                "dep-1", "registry.example.com/agent@sha256:2", revision_source=None
+            ),
+            {
+                "source_revision_config": {
+                    "image_uri": "registry.example.com/agent@sha256:2"
+                }
+            },
+            id="revision_without_source_override_omits_revision_source",
+        ),
+        pytest.param(
+            lambda c: c.update_deployment(
+                "dep-1",
+                "registry.example.com/agent@sha256:2",
+                revision_source="internal_docker",
+                tracked_packages=["langgraph:1.0.0"],
+            ),
+            {
+                "revision_source": "internal_docker",
+                "source_revision_config": {
+                    "image_uri": "registry.example.com/agent@sha256:2"
+                },
+                "tracked_packages": ["langgraph:1.0.0"],
+            },
+            id="revision_with_source_override_names_it",
+        ),
+    ],
+)
+def test_request_body_matches_control_plane_contract(call, expected_body):
+    captured: dict = {}
+    call(_capturing_client(captured))
+    assert json.loads(captured["body"]) == expected_body
+
+
+@pytest.mark.parametrize(
+    ("call", "method", "route"),
+    [
+        pytest.param(
+            lambda c: c.create_deployment(
+                name="n",
+                source="internal_docker",
+                source_config={"deployment_type": "dev"},
+                source_revision_config={},
+            ),
+            "POST",
+            "/v2/deployments",
+            id="create_deployment",
+        ),
+        pytest.param(
+            lambda c: c.get_deployment("dep-1"),
+            "GET",
+            "/v2/deployments/dep-1",
+            id="get_deployment",
+        ),
+        pytest.param(
+            lambda c: c.delete_deployment("dep-1"),
+            "DELETE",
+            "/v2/deployments/dep-1",
+            id="delete_deployment",
+        ),
+        pytest.param(
+            lambda c: c.update_deployment("dep-1", "img", revision_source=None),
+            "PATCH",
+            "/v2/deployments/dep-1",
+            id="patch_deployment",
+        ),
+        pytest.param(
+            lambda c: c.request_push_token("dep-1"),
+            "POST",
+            "/v2/deployments/dep-1/push-token",
+            id="push_token",
+        ),
+        pytest.param(
+            lambda c: c.request_upload_url("dep-1"),
+            "POST",
+            "/v2/deployments/dep-1/upload-url",
+            id="upload_url",
+        ),
+        pytest.param(
+            lambda c: c.list_revisions("dep-1", limit=5),
+            "GET",
+            "/v2/deployments/dep-1/revisions?limit=5",
+            id="list_revisions_puts_limit_in_query",
+        ),
+        pytest.param(
+            lambda c: c.get_revision("dep-1", "rev-2"),
+            "GET",
+            "/v2/deployments/dep-1/revisions/rev-2",
+            id="get_revision",
+        ),
+        pytest.param(
+            lambda c: c.get_build_logs("dep-1", "rev-2", {"limit": 10}),
+            "POST",
+            "/v1/projects/dep-1/revisions/rev-2/build_logs",
+            id="build_logs",
+        ),
+    ],
+)
+def test_request_targets_control_plane_route_under_base_url(call, method, route):
+    seen: dict = {}
+    call(_routing_client(seen))
+    assert (seen["method"], seen["url"]) == (
+        method,
+        f"https://api.example.com/prefix{route}",
+    )
+
+
+def test_injected_transport_receives_requests_under_the_prefixed_base_url():
+    seen: dict = {}
+
+    def handler(req: httpx.Request) -> httpx.Response:
+        seen["url"] = str(req.url)
+        seen["api_key"] = req.headers["x-api-key"]
+        return httpx.Response(200, json={"ok": True})
+
+    c = HostBackendClient(
+        "https://smith.example.com/api-host",
+        "key",
+        transport=httpx.MockTransport(handler),
+    )
+
+    assert c.list_revisions("dep-1", limit=2) == []
+    assert seen == {
+        "url": "https://smith.example.com/api-host/v2/deployments/dep-1/revisions?limit=2",
+        "api_key": "key",
+    }
+
+
+CLOUD = ("https://api.host.langchain.com", "https://smith.langchain.com")
+
+
+@pytest.mark.parametrize(
+    ("host_url", "langsmith_endpoint", "expected"),
+    [
+        pytest.param(None, None, CLOUD, id="nothing_configured_targets_cloud"),
+        pytest.param(
+            None, "https://api.smith.langchain.com", CLOUD, id="cloud_langsmith_api"
+        ),
+        pytest.param(
+            None,
+            "https://api.smith.langchain.com/api/v1",
+            CLOUD,
+            id="cloud_langsmith_api_with_versioned_path",
+        ),
+        pytest.param(
+            None, "https://api.langchain.com", CLOUD, id="cloud_langchain_api_alias"
+        ),
+        pytest.param(
+            None,
+            "https://xapi.smith.langchain.com",
+            CLOUD,
+            id="lookalike_cloud_host_is_not_rewritten_into_a_control_plane",
+        ),
+        pytest.param(
+            None,
+            "https://eu.api.smith.langchain.com",
+            ("https://eu.api.host.langchain.com", "https://eu.smith.langchain.com"),
+            id="eu_cloud_maps_to_eu_control_plane",
+        ),
+        pytest.param(
+            None,
+            "https://dev.api.smith.langchain.com",
+            ("https://dev.api.host.langchain.com", "https://dev.smith.langchain.com"),
+            id="dev_cloud_maps_to_dev_control_plane",
+        ),
+        pytest.param(
+            None,
+            "https://aks.smith.langchain.dev/api",
+            (
+                "https://aks.smith.langchain.dev/api-host",
+                "https://aks.smith.langchain.dev",
+            ),
+            id="self_hosted_api_path_becomes_api_host",
+        ),
+        pytest.param(
+            None,
+            "https://smith.example.com/api/v1",
+            ("https://smith.example.com/api-host", "https://smith.example.com"),
+            id="self_hosted_versioned_api_path_becomes_api_host",
+        ),
+        pytest.param(
+            None,
+            "https://smith.example.com",
+            ("https://smith.example.com/api-host", "https://smith.example.com"),
+            id="self_hosted_origin_gets_api_host_appended",
+        ),
+        pytest.param(
+            None,
+            "https://corp.example.com/langsmith/api/v1",
+            (
+                "https://corp.example.com/langsmith/api-host",
+                "https://corp.example.com/langsmith",
+            ),
+            id="self_hosted_path_prefix_is_kept",
+        ),
+        pytest.param(
+            "https://custom.host.example",
+            "https://aks.smith.langchain.dev/api",
+            ("https://custom.host.example", "https://smith.langchain.com"),
+            id="explicit_host_url_beats_langsmith_endpoint",
+        ),
+        pytest.param(
+            "https://api.host.langchain.com",
+            "https://aks.smith.langchain.dev/api",
+            CLOUD,
+            id="explicit_cloud_host_url_beats_self_hosted_endpoint",
+        ),
+        pytest.param(
+            "https://smith.example.com/api-host/",
+            None,
+            ("https://smith.example.com/api-host", "https://smith.example.com"),
+            id="explicit_api_host_url_derives_dashboard_root",
+        ),
+        pytest.param(
+            "https://corp.example.com/langsmith/api-host",
+            None,
+            (
+                "https://corp.example.com/langsmith/api-host",
+                "https://corp.example.com/langsmith",
+            ),
+            id="explicit_api_host_url_keeps_path_prefix_in_dashboard",
+        ),
+        pytest.param(
+            "http://localhost:8080",
+            None,
+            ("http://localhost:8080", "http://localhost:8080"),
+            id="localhost_dashboard_is_the_same_origin",
+        ),
+        pytest.param(
+            "http://localhost:8080/api-host",
+            None,
+            ("http://localhost:8080/api-host", "http://localhost:8080"),
+            id="localhost_api_host_dashboard_is_the_origin",
+        ),
+        pytest.param(
+            "https://eu.api.host.langchain.com",
+            None,
+            ("https://eu.api.host.langchain.com", "https://eu.smith.langchain.com"),
+            id="regional_control_plane_maps_to_regional_dashboard",
+        ),
+    ],
+)
+def test_control_plane_endpoints_resolve(host_url, langsmith_endpoint, expected):
+    endpoints = ControlPlaneEndpoints.resolve(host_url, langsmith_endpoint)
+
+    assert (endpoints.control_plane_url, endpoints.dashboard_url) == expected
+
+
+@pytest.mark.parametrize(
+    ("payload", "expected"),
+    [
+        pytest.param(
+            {"resources": [{"id": "a"}, {"id": "b"}]},
+            [{"id": "a"}, {"id": "b"}],
+            id="list_returns_the_resources",
+        ),
+        pytest.param({"resources": []}, [], id="empty_list"),
+        pytest.param({}, [], id="missing_key"),
+        pytest.param({"resources": None}, [], id="null_resources"),
+        pytest.param(
+            {"resources": ["nope", {"id": "a"}]}, [{"id": "a"}], id="skips_non_objects"
+        ),
+        pytest.param([], [], id="unexpected_envelope"),
+    ],
+)
+def test_list_endpoints_return_resource_objects(payload, expected):
+    def handler(req: httpx.Request) -> httpx.Response:
+        return httpx.Response(200, json=payload)
+
+    c = HostBackendClient(
+        "https://api.example.com", "key", transport=httpx.MockTransport(handler)
+    )
+
+    assert c.list_deployments() == expected
+
+
+def test_list_listeners_asks_for_a_full_page():
+    seen: dict = {}
+
+    def handler(req: httpx.Request) -> httpx.Response:
+        seen["url"] = str(req.url)
+        return httpx.Response(200, json={"resources": [{"id": "listener-1"}]})
+
+    c = HostBackendClient(
+        "https://api.example.com", "key", transport=httpx.MockTransport(handler)
+    )
+
+    assert c.list_listeners() == [{"id": "listener-1"}]
+    assert seen["url"] == "https://api.example.com/v2/listeners?limit=100"
+
+
+@pytest.mark.parametrize(
+    ("control_plane_url", "expected"),
+    [
+        pytest.param("https://api.host.langchain.com", True, id="cloud"),
+        pytest.param("https://eu.api.host.langchain.com", True, id="cloud_region"),
+        pytest.param("https://dev.api.host.langchain.com", True, id="cloud_dev"),
+        pytest.param("https://smith.example.com/api-host", False, id="self_hosted"),
+        pytest.param(
+            "https://corp.example.com/langsmith/api-host",
+            False,
+            id="self_hosted_prefix",
+        ),
+        pytest.param("http://localhost:8080/api-host", False, id="local"),
+        pytest.param(
+            "https://evil-api.host.langchain.com", False, id="lookalike_needs_a_dot"
+        ),
+    ],
+)
+def test_is_cloud_recognises_the_managed_control_plane(control_plane_url, expected):
+    endpoints = ControlPlaneEndpoints.from_control_plane_url(control_plane_url)
+
+    assert endpoints.is_cloud is expected
+
+
+@pytest.mark.parametrize(
+    ("call", "expected_params"),
+    [
+        pytest.param(
+            lambda c: c.list_deployments(name="agent"),
+            {"name": "agent"},
+            id="exact_name_filters_server_side",
+        ),
+        pytest.param(
+            lambda c: c.list_deployments(name_contains="age"),
+            {"name_contains": "age"},
+            id="substring_search_keeps_its_own_parameter",
+        ),
+        pytest.param(
+            lambda c: c.list_deployments(),
+            {},
+            id="no_filter_sends_no_parameters",
+        ),
+        pytest.param(
+            lambda c: c.list_deployments(
+                name="agent", name_contains="agent", limit=100
+            ),
+            {"name": "agent", "name_contains": "agent", "limit": "100"},
+            id="both_filters_travel_together_for_older_servers",
+        ),
+    ],
+)
+def test_list_deployments_sends_one_name_filter(call, expected_params):
+    seen: dict = {}
+
+    def handler(req: httpx.Request) -> httpx.Response:
+        seen.update(dict(req.url.params))
+        return httpx.Response(200, json={"resources": []})
+
+    call(
+        HostBackendClient(
+            "https://api.example.com", "key", transport=httpx.MockTransport(handler)
+        )
+    )
+
+    assert seen == expected_params
+
+
+@pytest.mark.parametrize(
+    ("body", "expected"),
+    [
+        pytest.param(
+            {"detail": "Source configuration error: bad listener"},
+            "Source configuration error: bad listener",
+            id="fastapi_detail_is_unwrapped",
+        ),
+        pytest.param(
+            {"detail": {"loc": ["body"], "msg": "nope"}},
+            None,
+            id="a_structured_detail_is_left_alone",
+        ),
+        pytest.param({"other": "shape"}, None, id="an_unknown_shape_is_left_alone"),
+    ],
+)
+def test_error_detail_is_readable(body, expected):
+    c = HostBackendClient(
+        "https://api.example.com",
+        "key",
+        transport=httpx.MockTransport(lambda req: httpx.Response(400, json=body)),
+    )
+
+    with pytest.raises(HostBackendError) as error:
+        c.get_deployment("dep-1")
+
+    assert error.value.detail == expected
+    if expected is not None:
+        assert error.value.message.endswith(expected)

libs/cli/tests/unit_tests/test_image_reference.py

@@ -0,0 +1,71 @@
+import pytest
+
+from langgraph_cli.image_reference import ImageReference
+
+
+@pytest.mark.parametrize(
+    ("reference", "repository", "tag"),
+    [
+        pytest.param(
+            "registry.example.com/team/app:v1",
+            "registry.example.com/team/app",
+            "v1",
+            id="tag_after_last_slash",
+        ),
+        pytest.param(
+            "registry.example.com/team/app",
+            "registry.example.com/team/app",
+            None,
+            id="no_tag",
+        ),
+        pytest.param(
+            "localhost:5000/app",
+            "localhost:5000/app",
+            None,
+            id="registry_port_is_not_a_tag",
+        ),
+        pytest.param(
+            "localhost:5000/app:latest",
+            "localhost:5000/app",
+            "latest",
+            id="registry_port_with_tag",
+        ),
+        pytest.param("app:dev", "app", "dev", id="bare_name_with_tag"),
+    ],
+)
+def test_parse_splits_repository_and_tag(reference, repository, tag):
+    assert ImageReference.parse(reference) == ImageReference(repository, tag)
+
+
+def test_with_tag_replaces_the_tag():
+    assert ImageReference("r/app", "v1").with_tag("v2") == ImageReference("r/app", "v2")
+
+
+@pytest.mark.parametrize(
+    ("reference", "expected"),
+    [
+        pytest.param(ImageReference("r/app", "v1"), "r/app:v1", id="tagged"),
+        pytest.param(ImageReference("r/app"), "r/app", id="untagged"),
+    ],
+)
+def test_str_renders_the_docker_reference(reference, expected):
+    assert str(reference) == expected
+
+
+@pytest.mark.parametrize(
+    ("repo_digest", "expected"),
+    [
+        pytest.param("localhost:5000/app@sha256:abc", True, id="same_repository"),
+        pytest.param("localhost:5000/app-2@sha256:abc", False, id="other_repository"),
+        pytest.param("mirror.example.com/app@sha256:abc", False, id="other_registry"),
+    ],
+)
+def test_matches_digest_only_for_the_same_repository(repo_digest, expected):
+    assert ImageReference("localhost:5000/app", "v1").matches_digest(repo_digest) is (
+        expected
+    )
+
+
+def test_parse_rejects_a_digest_reference():
+    with pytest.raises(ValueError, match="digest"):
+        ImageReference.parse("registry.example.com/app@sha256:abc")

libs/langgraph/langgraph/pregel/_loop.py

@@ -119,6 +119,7 @@ from langgraph.pregel._io import (
 )
 from langgraph.pregel._messages import ensure_message_ids
 from langgraph.pregel._read import PregelNode
+from langgraph.pregel._task_status import read_task_statuses
 from langgraph.pregel._utils import get_new_channel_versions, is_xxh3_128_hexdigest
 from langgraph.pregel.debug import (
     map_debug_checkpoint,
@@ -736,17 +737,14 @@ class PregelLoop:
     def _reapply_writes_to_succeeded_nodes(
         self, tasks: Mapping[str, PregelExecutableTask]
     ) -> None:
-        """Restore successful channel writes from checkpoint to in-memory tasks.
+        """Restore the output of finished tasks from checkpoint to in-memory tasks.
 
-        Skips control signals (ERROR, ERROR_SOURCE_NODE, INTERRUPT, RESUME)
-        so that failed/interrupted tasks remain with empty writes and will be
-        re-executed (or routed to error handlers) by the runner.
+        Unfinished (failed or interrupted) tasks keep empty writes, so the
+        runner re-executes them or routes them to error handlers.
         """
-        for tid, k, v in self.checkpoint_pending_writes:
-            if k in (ERROR, ERROR_SOURCE_NODE, INTERRUPT, RESUME):
-                continue
+        for tid, status in read_task_statuses(self.checkpoint_pending_writes).items():
             if task := tasks.get(tid):
-                task.writes.append((k, v))
+                task.writes.extend(status.output)
 
     def _resume_error_handlers_if_applicable(self) -> None:
         """On resume, schedule error handlers for tasks that failed in a prior run.
@@ -816,35 +814,13 @@ class PregelLoop:
                 self.tasks[handler_task.id] = handler_task
 
     def _pending_interrupts(self) -> set[str]:
-        """Return the set of interrupt ids that are pending without corresponding resume values."""
-        # mapping of task ids to interrupt ids
-        pending_interrupts: dict[str, str] = {}
-
-        # set of resume task ids
-        pending_resumes: set[str] = set()
-
-        for task_id, write_type, value in self.checkpoint_pending_writes:
-            if write_type == INTERRUPT:
-                # interrupts is always a list, but there should only be one element
-                pending_interrupts[task_id] = value[0].id
-            elif write_type == RESUME:
-                pending_resumes.add(task_id)
-
-        resumed_interrupt_ids = {
-            pending_interrupts[task_id]
-            for task_id in pending_resumes
-            if task_id in pending_interrupts
+        """Return the ids of interrupts that are still waiting for an answer."""
+        return {
+            interrupt.id
+            for status in read_task_statuses(self.checkpoint_pending_writes).values()
+            for interrupt in status.pending_interrupts
         }
 
-        # Keep only interrupts whose interrupt_id is not resumed
-        hanging_interrupts: set[str] = {
-            interrupt_id
-            for interrupt_id in pending_interrupts.values()
-            if interrupt_id not in resumed_interrupt_ids
-        }
-
-        return hanging_interrupts
-
     def _first(
         self, *, input_keys: str | Sequence[str], updated_channels: set[str] | None
     ) -> set[str] | None:

libs/langgraph/langgraph/pregel/_runner.py

@@ -45,6 +45,7 @@ from langgraph.errors import GraphBubbleUp, GraphInterrupt
 from langgraph.pregel._algo import Call
 from langgraph.pregel._executor import Submit
 from langgraph.pregel._retry import arun_with_retry, run_with_retry
+from langgraph.pregel._task_status import CONTROL_WRITES
 from langgraph.types import (
     CachePolicy,
     PregelExecutableTask,
@@ -606,8 +607,9 @@ class PregelRunner:
                 task.config is None or TAG_HIDDEN not in task.config.get("tags", [])
             ):
                 self.node_finished(task.name)
-            if not task.writes:
-                # add no writes marker
+            if all(chan in CONTROL_WRITES for chan, _ in task.writes):
+                # record that the task finished, even if it produced no output
+                # (see `langgraph.pregel._task_status`)
                 task.writes.append((NO_WRITES, None))
             # save task writes to checkpointer
             self.put_writes()(task.id, task.writes)  # type: ignore[misc]

libs/langgraph/langgraph/pregel/_task_status.py

@@ -0,0 +1,127 @@
+"""Read the status of each task from the writes recorded for a superstep.
+
+While a superstep is open, the checkpointer keeps a log of writes for each
+task in that step. Entries are added as tasks run and are only discarded when
+the whole superstep finishes and a new checkpoint is saved. When a task runs
+again, for example after being resumed, its earlier entries stay in the log.
+
+This module is the single place that turns that log into task status. Code that
+needs to know whether a task finished, which interrupts it raised, which of them
+are still waiting for an answer, or which output it produced must use
+`read_task_statuses` instead of inspecting the writes directly.
+
+The log uses two kinds of writes:
+
+- Control writes describe what happened to a task: `INTERRUPT` (the task asked
+  a question), `RESUME` (answers the task has received), `ERROR`, and
+  `ERROR_SOURCE_NODE`. `INTERRUPT`, `RESUME` and `ERROR` each have a fixed slot
+  per task (`WRITES_IDX_MAP`), so a newer write of the same kind can replace an
+  older one.
+- Every other write is output: channel writes, `RETURN` for functional tasks,
+  and the `NO_WRITES` marker.
+
+The rules are:
+
+1. When a task that ran finishes successfully, `PregelRunner.commit` records at
+   least one output write, adding `NO_WRITES` if the task produced no other
+   output.
+2. A task that pauses at an interrupt records only control writes.
+3. A task is therefore treated as finished if and only if it has an output
+   write.
+4. Because `INTERRUPT` is stored in a fixed slot, its recorded value is the most
+   recent question the task asked. That question is waiting for an answer only
+   while the task is unfinished.
+
+A `RESUME` write never means a task is finished: it can hold the answer to an
+earlier question while the task waits on a later one.
+
+What these rules cannot see:
+
+- A task whose result came from the cache does not go through
+  `PregelRunner.commit`, so nothing is recorded for it. It reads as not
+  finished.
+- A task that fails can record partial output writes along with its error. It
+  reads as finished, which is how the executor has always treated it.
+- Writes recorded before rule 1 existed may describe a finished task with no
+  output using only control writes. Those tasks read as unfinished, which
+  matches how they were treated before.
+"""
+
+from __future__ import annotations
+
+from collections.abc import Iterable, Sequence
+from dataclasses import dataclass
+from typing import Any
+
+from langgraph.checkpoint.base import PendingWrite
+
+from langgraph._internal._constants import (
+    ERROR,
+    ERROR_SOURCE_NODE,
+    INTERRUPT,
+    NULL_TASK_ID,
+    RESUME,
+)
+from langgraph.types import Interrupt
+
+__all__ = ("CONTROL_WRITES", "TaskStatus", "read_task_statuses")
+
+CONTROL_WRITES = frozenset((ERROR, ERROR_SOURCE_NODE, INTERRUPT, RESUME))
+"""Channels that describe what happened to a task rather than what it produced."""
+
+
+@dataclass(frozen=True, slots=True)
+class TaskStatus:
+    """The status of one task, read from the writes recorded for its superstep."""
+
+    output: tuple[tuple[str, Any], ...] = ()
+    """Output writes in recorded order. Empty if the task has not finished."""
+
+    interrupts: tuple[Interrupt, ...] = ()
+    """The most recent interrupts the task raised, whether or not they were answered."""
+
+    error: BaseException | None = None
+    """The recorded error, if any."""
+
+    @property
+    def finished(self) -> bool:
+        """Whether the task ran to completion."""
+        return bool(self.output)
+
+    @property
+    def pending_interrupts(self) -> tuple[Interrupt, ...]:
+        """Interrupts waiting for an answer. Always empty for a finished task."""
+        return () if self.finished else self.interrupts
+
+
+def read_task_statuses(
+    pending_writes: Iterable[PendingWrite],
+) -> dict[str, TaskStatus]:
+    """Return the status of every task that has recorded writes, keyed by task id.
+
+    Writes from `NULL_TASK_ID` are input to the superstep, not task activity, so
+    they are not included.
+    """
+    output: dict[str, list[tuple[str, Any]]] = {}
+    interrupts: dict[str, list[Interrupt]] = {}
+    errors: dict[str, BaseException] = {}
+    for task_id, channel, value in pending_writes:
+        if task_id == NULL_TASK_ID:
+            continue
+        output.setdefault(task_id, [])
+        if channel == INTERRUPT:
+            interrupts.setdefault(task_id, []).extend(
+                value if isinstance(value, Sequence) else [value]
+            )
+        elif channel == ERROR:
+            errors.setdefault(task_id, value)
+        elif channel not in CONTROL_WRITES:
+            output[task_id].append((channel, value))
+    return {
+        task_id: TaskStatus(
+            output=tuple(task_output),
+            interrupts=tuple(interrupts.get(task_id, ())),
+            error=errors.get(task_id),
+        )
+        for task_id, task_output in output.items()
+    }

libs/langgraph/langgraph/pregel/debug.py

@@ -26,6 +26,7 @@ from langgraph._internal._typing import MISSING
 from langgraph.channels.base import BaseChannel
 from langgraph.constants import TAG_HIDDEN
 from langgraph.pregel._io import read_channels
+from langgraph.pregel._task_status import TaskStatus, read_task_statuses
 from langgraph.types import (
     CheckpointPayload,
     PregelExecutableTask,
@@ -37,6 +38,8 @@ from langgraph.types import (
 
 TASK_NAMESPACE = UUID("6ba7b831-9dad-11d1-80b4-00c04fd430c8")
 
+_NOT_STARTED = TaskStatus()
+
 
 def map_debug_tasks(tasks: Iterable[PregelExecutableTask]) -> Iterator[TaskPayload]:
     """Produce "task" events for stream_mode=debug."""
@@ -211,35 +214,21 @@ def tasks_w_writes(
     pending_writes: list[PendingWrite] | None,
     states: dict[str, RunnableConfig | StateSnapshot] | None,
     output_keys: str | Sequence[str],
+    *,
+    live: bool = False,
 ) -> tuple[PregelTask, ...]:
-    """Apply writes / subgraph states to tasks to be returned in a StateSnapshot."""
-    pending_writes = pending_writes or []
+    """Apply writes / subgraph states to tasks to be returned in a StateSnapshot.
+
+    With `live=True`, tasks report only the interrupts still waiting for an
+    answer, as of the most recent writes. Otherwise tasks report the interrupts
+    they raised in the step, including answered ones, as a record of the step.
+    """
+    statuses = read_task_statuses(pending_writes or [])
     out: list[PregelTask] = []
     for task in tasks:
-        rtn = next(
-            (
-                val
-                for tid, chan, val in pending_writes
-                if tid == task.id and chan == RETURN
-            ),
-            MISSING,
-        )
-        task_error = next(
-            (exc for tid, n, exc in pending_writes if tid == task.id and n == ERROR),
-            None,
-        )
-        task_interrupts = tuple(
-            v
-            for tid, n, vv in pending_writes
-            if tid == task.id and n == INTERRUPT
-            for v in (vv if isinstance(vv, Sequence) else [vv])
-        )
-
-        task_writes = [
-            (chan, val)
-            for tid, chan, val in pending_writes
-            if tid == task.id and chan not in (ERROR, INTERRUPT, RETURN)
-        ]
+        status = statuses.get(task.id, _NOT_STARTED)
+        rtn = next((val for chan, val in status.output if chan == RETURN), MISSING)
+        task_writes = [(chan, val) for chan, val in status.output if chan != RETURN]
 
         if rtn is not MISSING:
             task_result = rtn
@@ -261,19 +250,15 @@ def tasks_w_writes(
             mapped_writes = map_task_result_writes(filtered_writes)
             task_result = mapped_writes if filtered_writes else {}
 
-        has_writes = rtn is not MISSING or any(
-            w[0] == task.id and w[1] not in (ERROR, INTERRUPT) for w in pending_writes
-        )
-
         out.append(
             PregelTask(
                 task.id,
                 task.name,
                 task.path,
-                task_error,
-                task_interrupts,
+                status.error,
+                status.pending_interrupts if live else status.interrupts,
                 states.get(task.id) if states else None,
-                task_result if has_writes else None,
+                task_result if status.finished else None,
             )
         )
     return tuple(out)

libs/langgraph/langgraph/pregel/main.py

@@ -79,7 +79,6 @@ from langgraph._internal._constants import (
     CONFIG_KEY_STREAM_MESSAGES_V2,
     CONFIG_KEY_TASK_ID,
     CONFIG_KEY_THREAD_ID,
-    ERROR,
     INPUT,
     INTERRUPT,
     NS_END,
@@ -149,6 +148,7 @@ from langgraph.pregel._messages import (
 from langgraph.pregel._read import DEFAULT_BOUND, PregelNode
 from langgraph.pregel._retry import RetryPolicy
 from langgraph.pregel._runner import PregelRunner
+from langgraph.pregel._task_status import read_task_statuses
 from langgraph.pregel._tools import StreamToolCallHandler
 from langgraph.pregel._utils import (
     get_new_channel_versions,
@@ -1147,8 +1147,16 @@ class Pregel(
         config: RunnableConfig,
         saved: CheckpointTuple | None,
         recurse: BaseCheckpointSaver | None = None,
-        apply_pending_writes: bool = False,
+        live: bool = False,
     ) -> StateSnapshot:
+        """Build a `StateSnapshot` from a saved checkpoint and its pending writes.
+
+        With `live=True` the snapshot shows current status: values include the
+        output of tasks that already finished, `next` lists only tasks that still
+        need to run, and `interrupts` lists only questions still waiting for an
+        answer. Otherwise the snapshot is a record of the step: values as of the
+        start of the step, every task in the step, and the interrupts they raised.
+        """
         if not saved:
             return StateSnapshot(
                 values={},
@@ -1236,13 +1244,10 @@ class Pregel(
                 None,
                 self.trigger_to_nodes,
             )
-        if apply_pending_writes and saved.pending_writes:
-            for tid, k, v in saved.pending_writes:
-                if k in (ERROR, INTERRUPT):
-                    continue
-                if tid not in next_tasks:
-                    continue
-                next_tasks[tid].writes.append((k, v))
+        if live and saved.pending_writes:
+            for tid, status in read_task_statuses(saved.pending_writes).items():
+                if tid in next_tasks:
+                    next_tasks[tid].writes.extend(status.output)
             if tasks := [t for t in next_tasks.values() if t.writes]:
                 apply_writes(
                     saved.checkpoint, channels, tasks, None, self.trigger_to_nodes
@@ -1252,6 +1257,7 @@ class Pregel(
             saved.pending_writes,
             task_states,
             self.stream_channels_asis,
+            live=live,
         )
         # assemble the state snapshot
         return StateSnapshot(
@@ -1270,8 +1276,16 @@ class Pregel(
         config: RunnableConfig,
         saved: CheckpointTuple | None,
         recurse: BaseCheckpointSaver | None = None,
-        apply_pending_writes: bool = False,
+        live: bool = False,
     ) -> StateSnapshot:
+        """Build a `StateSnapshot` from a saved checkpoint and its pending writes.
+
+        With `live=True` the snapshot shows current status: values include the
+        output of tasks that already finished, `next` lists only tasks that still
+        need to run, and `interrupts` lists only questions still waiting for an
+        answer. Otherwise the snapshot is a record of the step: values as of the
+        start of the step, every task in the step, and the interrupts they raised.
+        """
         if not saved:
             return StateSnapshot(
                 values={},
@@ -1359,13 +1373,10 @@ class Pregel(
                 None,
                 self.trigger_to_nodes,
             )
-        if apply_pending_writes and saved.pending_writes:
-            for tid, k, v in saved.pending_writes:
-                if k in (ERROR, INTERRUPT):
-                    continue
-                if tid not in next_tasks:
-                    continue
-                next_tasks[tid].writes.append((k, v))
+        if live and saved.pending_writes:
+            for tid, status in read_task_statuses(saved.pending_writes).items():
+                if tid in next_tasks:
+                    next_tasks[tid].writes.extend(status.output)
             if tasks := [t for t in next_tasks.values() if t.writes]:
                 apply_writes(
                     saved.checkpoint, channels, tasks, None, self.trigger_to_nodes
@@ -1376,6 +1387,7 @@ class Pregel(
             saved.pending_writes,
             task_states,
             self.stream_channels_asis,
+            live=live,
         )
         # assemble the state snapshot
         return StateSnapshot(
@@ -1430,7 +1442,7 @@ class Pregel(
             config,
             saved,
             recurse=checkpointer if subgraphs else None,
-            apply_pending_writes=CONFIG_KEY_CHECKPOINT_ID not in config[CONF],
+            live=CONFIG_KEY_CHECKPOINT_ID not in config[CONF],
         )
 
     async def aget_state(
@@ -1474,7 +1486,7 @@ class Pregel(
             config,
             saved,
             recurse=checkpointer if subgraphs else None,
-            apply_pending_writes=CONFIG_KEY_CHECKPOINT_ID not in config[CONF],
+            live=CONFIG_KEY_CHECKPOINT_ID not in config[CONF],
         )
 
     def get_state_history(
@@ -1710,13 +1722,12 @@ class Pregel(
                             checkpointer.get_next_version,
                             self.trigger_to_nodes,
                         )
-                    # apply writes from tasks that already ran
-                    for tid, k, v in saved.pending_writes or []:
-                        if k in (ERROR, INTERRUPT):
-                            continue
-                        if tid not in next_tasks:
-                            continue
-                        next_tasks[tid].writes.append((k, v))
+                    # apply writes from tasks that already finished
+                    for tid, status in read_task_statuses(
+                        saved.pending_writes or []
+                    ).items():
+                        if tid in next_tasks:
+                            next_tasks[tid].writes.extend(status.output)
                     # clear all current tasks
                     apply_writes(
                         checkpoint,
@@ -2174,13 +2185,12 @@ class Pregel(
                             checkpointer.get_next_version,
                             self.trigger_to_nodes,
                         )
-                    # apply writes from tasks that already ran
-                    for tid, k, v in saved.pending_writes or []:
-                        if k in (ERROR, INTERRUPT):
-                            continue
-                        if tid not in next_tasks:
-                            continue
-                        next_tasks[tid].writes.append((k, v))
+                    # apply writes from tasks that already finished
+                    for tid, status in read_task_statuses(
+                        saved.pending_writes or []
+                    ).items():
+                        if tid in next_tasks:
+                            next_tasks[tid].writes.extend(status.output)
                     # clear all current tasks
                     apply_writes(
                         checkpoint,

libs/langgraph/langgraph/types.py

@@ -726,7 +726,13 @@ class StateSnapshot(NamedTuple):
     tasks: tuple[PregelTask, ...]
     """Tasks to execute in this step. If already attempted, may contain an error."""
     interrupts: tuple[Interrupt, ...]
-    """Interrupts that occurred in this step that are pending resolution."""
+    """Interrupts that occurred in this step.
+
+    When reading the latest state (`get_state` without a `checkpoint_id`), this
+    contains only interrupts still waiting for an answer. When reading a specific
+    checkpoint or state history, it contains the most recent interrupt each task
+    raised in that step, including ones answered later in the same step.
+    """
 
 
 class Send:

libs/langgraph/tests/test_interrupt_state.py

@@ -0,0 +1,534 @@
+"""State reads while some tasks of a superstep are finished and others are paused.
+
+When parallel tasks each call `interrupt()` and only some of them are resumed,
+the superstep stays open. Its recorded writes then contain the old interrupt of
+each finished task next to that task's output. These tests check that state
+reads, which are rebuilt from the checkpointer, report only the interrupts that
+still need an answer.
+"""
+
+import operator
+import sys
+import uuid
+from collections import Counter
+from typing import Annotated, Any
+
+import pytest
+from langgraph.checkpoint.base import BaseCheckpointSaver
+from typing_extensions import TypedDict
+
+from langgraph._internal._constants import (
+    ERROR,
+    INTERRUPT,
+    NO_WRITES,
+    NULL_TASK_ID,
+    RESUME,
+    RETURN,
+)
+from langgraph.func import entrypoint, task
+from langgraph.graph import END, START, StateGraph
+from langgraph.pregel._task_status import read_task_statuses
+from langgraph.types import Command, Durability, Interrupt, Send, interrupt
+
+pytestmark = pytest.mark.anyio
+
+NEEDS_CONTEXTVARS = pytest.mark.skipif(
+    sys.version_info < (3, 11),
+    reason="Python 3.11+ is required for async contextvars support",
+)
+
+
+class State(TypedDict, total=False):
+    log: Annotated[list[str], operator.add]
+    count: int
+
+
+def _config() -> dict[str, Any]:
+    return {"configurable": {"thread_id": str(uuid.uuid4())}}
+
+
+def _build_parallel(
+    checkpointer: BaseCheckpointSaver,
+    calls: Counter[str],
+    *,
+    a_questions: int = 1,
+    a_returns: Any = "log",
+):
+    """Build a graph where nodes `a` and `b` start in parallel and both ask questions.
+
+    `a` asks `a_questions` questions in a row. `a_returns` controls what `a`
+    returns after its last answer. The default `"log"` returns the answers in
+    `log`. Any other value is returned as-is.
+    """
+
+    def a(state: State) -> Any:
+        calls["a"] += 1
+        answers = [interrupt(f"A{i + 1}") for i in range(a_questions)]
+        if a_returns == "log":
+            return {"log": [f"a:{answer}" for answer in answers]}
+        return a_returns
+
+    def b(state: State) -> State:
+        calls["b"] += 1
+        return {"log": [f"b:{interrupt('B')}"]}
+
+    builder = StateGraph(State)
+    builder.add_node("a", a)
+    builder.add_node("b", b)
+    builder.add_edge(START, "a")
+    builder.add_edge(START, "b")
+    builder.add_edge("a", END)
+    builder.add_edge("b", END)
+    return builder.compile(checkpointer=checkpointer)
+
+
+def _interrupt_by_value(snapshot: Any, value: str) -> Interrupt:
+    return next(i for i in snapshot.interrupts if i.value == value)
+
+
+def _task(snapshot: Any, name: str) -> Any:
+    return next(t for t in snapshot.tasks if t.name == name)
+
+
+def _interrupt_values(interrupts: Any) -> list[str]:
+    return sorted(i.value for i in interrupts)
+
+
+# --- Task A answered and finished, task B still paused ---
+
+
+def test_finished_task_does_not_report_answered_interrupt(
+    sync_checkpointer: BaseCheckpointSaver, durability: Durability
+) -> None:
+    calls: Counter[str] = Counter()
+    graph = _build_parallel(sync_checkpointer, calls)
+    config = _config()
+
+    graph.invoke({"log": []}, config, durability=durability)
+    snapshot = graph.get_state(config)
+    assert _interrupt_values(snapshot.interrupts) == ["A1", "B"]
+
+    graph.invoke(
+        Command(resume={_interrupt_by_value(snapshot, "A1").id: "yes"}),
+        config,
+        durability=durability,
+    )
+
+    snapshot = graph.get_state(config)
+    assert _interrupt_values(snapshot.interrupts) == ["B"]
+    assert snapshot.next == ("b",)
+    assert _task(snapshot, "a").interrupts == ()
+    assert _task(snapshot, "a").result == {"log": ["a:yes"]}
+    assert _interrupt_values(_task(snapshot, "b").interrupts) == ["B"]
+    assert _task(snapshot, "b").result is None
+
+    # Reading the same checkpoint by id gives the record of the step: every task
+    # in it, and every question asked, including the one A already answered.
+    record = graph.get_state(snapshot.config)
+    assert sorted(record.next) == ["a", "b"]
+    assert _interrupt_values(record.interrupts) == ["A1", "B"]
+    assert _interrupt_values(_task(record, "a").interrupts) == ["A1"]
+    assert _task(record, "a").result == {"log": ["a:yes"]}
+
+    # B can still be answered, and the graph finishes normally.
+    result = graph.invoke(
+        Command(resume={_interrupt_by_value(snapshot, "B").id: "ok"}),
+        config,
+        durability=durability,
+    )
+    assert sorted(result["log"]) == ["a:yes", "b:ok"]
+    assert calls == {"a": 2, "b": 3}
+    snapshot = graph.get_state(config)
+    assert snapshot.next == ()
+    assert snapshot.interrupts == ()
+
+    # History still shows where each question was asked.
+    asked = [
+        _interrupt_values(s.interrupts)
+        for s in graph.get_state_history(config)
+        if s.interrupts
+    ]
+    if durability != "exit":
+        assert asked == [["A1", "B"]]
+
+
+@NEEDS_CONTEXTVARS
+async def test_finished_task_does_not_report_answered_interrupt_async(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    calls: Counter[str] = Counter()
+    graph = _build_parallel(async_checkpointer, calls)
+    config = _config()
+
+    await graph.ainvoke({"log": []}, config)
+    snapshot = await graph.aget_state(config)
+    await graph.ainvoke(
+        Command(resume={_interrupt_by_value(snapshot, "A1").id: "yes"}), config
+    )
+
+    snapshot = await graph.aget_state(config)
+    assert _interrupt_values(snapshot.interrupts) == ["B"]
+    assert snapshot.next == ("b",)
+    assert _task(snapshot, "a").interrupts == ()
+    assert _task(snapshot, "a").result == {"log": ["a:yes"]}
+    assert _interrupt_values(_task(snapshot, "b").interrupts) == ["B"]
+
+    record = await graph.aget_state(snapshot.config)
+    assert _interrupt_values(record.interrupts) == ["A1", "B"]
+    assert _interrupt_values(_task(record, "a").interrupts) == ["A1"]
+
+    result = await graph.ainvoke(
+        Command(resume={_interrupt_by_value(snapshot, "B").id: "ok"}), config
+    )
+    assert sorted(result["log"]) == ["a:yes", "b:ok"]
+    assert calls == {"a": 2, "b": 3}
+
+
+# --- Task A answered its first question and asked a second one ---
+
+
+def test_task_paused_at_second_question_stays_pending(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    calls: Counter[str] = Counter()
+    graph = _build_parallel(sync_checkpointer, calls, a_questions=2)
+    config = _config()
+
+    graph.invoke({"log": []}, config)
+    snapshot = graph.get_state(config)
+    graph.invoke(
+        Command(resume={_interrupt_by_value(snapshot, "A1").id: "one"}), config
+    )
+
+    snapshot = graph.get_state(config)
+    assert _interrupt_values(snapshot.interrupts) == ["A2", "B"]
+    # A is not finished: it has a saved answer, but no output.
+    assert sorted(snapshot.next) == ["a", "b"]
+    assert _interrupt_values(_task(snapshot, "a").interrupts) == ["A2"]
+    assert _task(snapshot, "a").result is None
+    assert _interrupt_values(_task(snapshot, "b").interrupts) == ["B"]
+
+    # Both remaining questions can be answered together.
+    result = graph.invoke(
+        Command(
+            resume={
+                _interrupt_by_value(snapshot, "A2").id: "two",
+                _interrupt_by_value(snapshot, "B").id: "ok",
+            }
+        ),
+        config,
+    )
+    assert sorted(result["log"]) == ["a:one", "a:two", "b:ok"]
+    snapshot = graph.get_state(config)
+    assert snapshot.next == ()
+    assert snapshot.interrupts == ()
+
+
+@NEEDS_CONTEXTVARS
+async def test_task_paused_at_second_question_stays_pending_async(
+    async_checkpointer: BaseCheckpointSaver,
+) -> None:
+    calls: Counter[str] = Counter()
+    graph = _build_parallel(async_checkpointer, calls, a_questions=2)
+    config = _config()
+
+    await graph.ainvoke({"log": []}, config)
+    snapshot = await graph.aget_state(config)
+    await graph.ainvoke(
+        Command(resume={_interrupt_by_value(snapshot, "A1").id: "one"}), config
+    )
+
+    snapshot = await graph.aget_state(config)
+    assert _interrupt_values(snapshot.interrupts) == ["A2", "B"]
+    assert sorted(snapshot.next) == ["a", "b"]
+    assert _interrupt_values(_task(snapshot, "a").interrupts) == ["A2"]
+    assert _task(snapshot, "a").result is None
+
+
+def test_task_paused_at_second_question_then_other_task_finishes(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    calls: Counter[str] = Counter()
+    graph = _build_parallel(sync_checkpointer, calls, a_questions=2)
+    config = _config()
+
+    graph.invoke({"log": []}, config)
+    snapshot = graph.get_state(config)
+    graph.invoke(
+        Command(resume={_interrupt_by_value(snapshot, "A1").id: "one"}), config
+    )
+    snapshot = graph.get_state(config)
+    graph.invoke(Command(resume={_interrupt_by_value(snapshot, "B").id: "ok"}), config)
+
+    snapshot = graph.get_state(config)
+    assert _interrupt_values(snapshot.interrupts) == ["A2"]
+    assert snapshot.next == ("a",)
+    assert _task(snapshot, "b").interrupts == ()
+    assert _task(snapshot, "b").result == {"log": ["b:ok"]}
+
+    result = graph.invoke(
+        Command(resume={_interrupt_by_value(snapshot, "A2").id: "two"}), config
+    )
+    assert sorted(result["log"]) == ["a:one", "a:two", "b:ok"]
+
+
+def test_resume_without_id_rejected_when_second_question_and_other_task_pending(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    calls: Counter[str] = Counter()
+    graph = _build_parallel(sync_checkpointer, calls, a_questions=2)
+    config = _config()
+
+    graph.invoke({"log": []}, config)
+    snapshot = graph.get_state(config)
+    graph.invoke(
+        Command(resume={_interrupt_by_value(snapshot, "A1").id: "one"}), config
+    )
+
+    # A2 and B are both waiting, so a resume value without an id is ambiguous.
+    with pytest.raises(RuntimeError, match="multiple pending interrupts"):
+        graph.invoke(Command(resume="ambiguous"), config)
+
+
+def test_resume_without_id_rejected_when_subgraph_has_parallel_interrupts(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    # A subgraph node whose child graph pauses in two parallel nodes records
+    # both interrupts under one parent task. Both count as pending, so a resume
+    # value without an id is ambiguous. (Before, only the first was counted and
+    # the value went to whichever interrupt consumed it first.)
+    child_builder = StateGraph(State)
+    child_builder.add_node("a", lambda s: {"log": [f"a:{interrupt('A')}"]})
+    child_builder.add_node("b", lambda s: {"log": [f"b:{interrupt('B')}"]})
+    child_builder.add_edge(START, "a")
+    child_builder.add_edge(START, "b")
+
+    builder = StateGraph(State)
+    builder.add_node("child", child_builder.compile())
+    builder.add_edge(START, "child")
+    graph = builder.compile(checkpointer=sync_checkpointer)
+    config = _config()
+
+    graph.invoke({"log": []}, config)
+    snapshot = graph.get_state(config)
+    assert _interrupt_values(snapshot.interrupts) == ["A", "B"]
+
+    with pytest.raises(RuntimeError, match="multiple pending interrupts"):
+        graph.invoke(Command(resume="ambiguous"), config)
+
+    result = graph.invoke(
+        Command(
+            resume={
+                _interrupt_by_value(snapshot, "A").id: "x",
+                _interrupt_by_value(snapshot, "B").id: "y",
+            }
+        ),
+        config,
+    )
+    assert sorted(result["log"]) == ["a:x", "b:y"]
+
+
+# --- Task A finished with an empty or falsy result ---
+
+
+@pytest.mark.parametrize(
+    "a_returns",
+    [None, {}, {"count": 0}, {"log": []}],
+    ids=["none", "empty_dict", "zero", "empty_list"],
+)
+def test_task_finished_with_falsy_result(
+    sync_checkpointer: BaseCheckpointSaver, a_returns: Any
+) -> None:
+    calls: Counter[str] = Counter()
+    graph = _build_parallel(sync_checkpointer, calls, a_returns=a_returns)
+    config = _config()
+
+    graph.invoke({"log": []}, config)
+    snapshot = graph.get_state(config)
+    graph.invoke(
+        Command(resume={_interrupt_by_value(snapshot, "A1").id: "yes"}), config
+    )
+
+    snapshot = graph.get_state(config)
+    assert _interrupt_values(snapshot.interrupts) == ["B"]
+    assert snapshot.next == ("b",)
+    assert _task(snapshot, "a").interrupts == ()
+
+    graph.invoke(Command(resume={_interrupt_by_value(snapshot, "B").id: "ok"}), config)
+    # A already finished, so resuming B must not run A again.
+    assert calls == {"a": 2, "b": 3}
+    snapshot = graph.get_state(config)
+    assert snapshot.next == ()
+    assert snapshot.interrupts == ()
+
+
+@pytest.mark.parametrize("a_returns", [None, {"count": 0}], ids=["none", "zero"])
+@NEEDS_CONTEXTVARS
+async def test_task_finished_with_falsy_result_async(
+    async_checkpointer: BaseCheckpointSaver, a_returns: Any
+) -> None:
+    calls: Counter[str] = Counter()
+    graph = _build_parallel(async_checkpointer, calls, a_returns=a_returns)
+    config = _config()
+
+    await graph.ainvoke({"log": []}, config)
+    snapshot = await graph.aget_state(config)
+    await graph.ainvoke(
+        Command(resume={_interrupt_by_value(snapshot, "A1").id: "yes"}), config
+    )
+
+    snapshot = await graph.aget_state(config)
+    assert _interrupt_values(snapshot.interrupts) == ["B"]
+    assert snapshot.next == ("b",)
+    assert _task(snapshot, "a").interrupts == ()
+
+    await graph.ainvoke(
+        Command(resume={_interrupt_by_value(snapshot, "B").id: "ok"}), config
+    )
+    assert calls == {"a": 2, "b": 3}
+
+
+# --- Subgraphs and the functional API ---
+
+
+def test_parallel_subgraphs_report_only_pending_interrupts(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    class ChildState(TypedDict):
+        prompt: str
+        answers: Annotated[list[str], operator.add]
+
+    def ask(state: ChildState) -> dict[str, Any]:
+        return {"answers": [interrupt(state["prompt"])]}
+
+    child_builder = StateGraph(ChildState)
+    child_builder.add_node("ask", ask)
+    child_builder.add_edge(START, "ask")
+    child = child_builder.compile()
+
+    class ParentState(TypedDict):
+        answers: Annotated[list[str], operator.add]
+
+    builder = StateGraph(ParentState)
+    builder.add_node("child", child)
+    builder.add_conditional_edges(
+        START,
+        lambda _: [Send("child", {"prompt": p, "answers": []}) for p in ("a", "b")],
+        ["child"],
+    )
+    graph = builder.compile(checkpointer=sync_checkpointer)
+    config = _config()
+
+    graph.invoke({"answers": []}, config)
+    snapshot = graph.get_state(config)
+    assert _interrupt_values(snapshot.interrupts) == ["a", "b"]
+    graph.invoke(Command(resume={_interrupt_by_value(snapshot, "a").id: "x"}), config)
+
+    snapshot = graph.get_state(config)
+    assert _interrupt_values(snapshot.interrupts) == ["b"]
+    assert snapshot.next == ("child",)
+    finished = next(t for t in snapshot.tasks if t.result is not None)
+    assert finished.interrupts == ()
+    assert finished.result == {"answers": ["x"]}
+
+    result = graph.invoke(
+        Command(resume={_interrupt_by_value(snapshot, "b").id: "y"}), config
+    )
+    assert sorted(result["answers"]) == ["x", "y"]
+
+
+def test_functional_task_finished_with_none_is_not_rerun(
+    sync_checkpointer: BaseCheckpointSaver,
+) -> None:
+    calls: Counter[str] = Counter()
+
+    @task
+    def ask_a() -> None:
+        calls["a"] += 1
+        interrupt("A")
+
+    @task
+    def ask_b() -> str:
+        calls["b"] += 1
+        return interrupt("B")
+
+    @entrypoint(checkpointer=sync_checkpointer)
+    def workflow(_: Any) -> list[Any]:
+        a, b = ask_a(), ask_b()
+        return [a.result(), b.result()]
+
+    config = _config()
+    workflow.invoke(1, config)
+    snapshot = workflow.get_state(config)
+    workflow.invoke(
+        Command(resume={_interrupt_by_value(snapshot, "A").id: "x"}), config
+    )
+
+    snapshot = workflow.get_state(config)
+    assert _interrupt_values(snapshot.interrupts) == ["B"]
+
+    result = workflow.invoke(
+        Command(resume={_interrupt_by_value(snapshot, "B").id: "y"}), config
+    )
+    assert result == [None, "y"]
+    assert calls == {"a": 2, "b": 3}
+
+
+# --- Reading task status from recorded writes ---
+
+
+def test_read_task_statuses() -> None:
+    a1 = Interrupt(value="A1", id="a")
+    a2 = Interrupt(value="A2", id="a")
+    b = Interrupt(value="B", id="b")
+    error = ValueError("boom")
+
+    statuses = read_task_statuses(
+        [
+            # answered and finished: old interrupt stays recorded
+            ("finished", INTERRUPT, (a1,)),
+            ("finished", RESUME, ["yes"]),
+            ("finished", "log", ["a:yes"]),
+            # answered once, then paused at a second question
+            ("paused", INTERRUPT, (a2,)),
+            ("paused", RESUME, ["one"]),
+            # finished with no output
+            ("no_output", INTERRUPT, (b,)),
+            ("no_output", RESUME, ["ok"]),
+            ("no_output", NO_WRITES, None),
+            # functional task that returned None
+            ("returned_none", RETURN, None),
+            # failed
+            ("failed", ERROR, error),
+            # not a task
+            (NULL_TASK_ID, RESUME, "global"),
+        ]
+    )
+
+    assert set(statuses) == {
+        "finished",
+        "paused",
+        "no_output",
+        "returned_none",
+        "failed",
+    }
+
+    assert statuses["finished"].finished
+    assert statuses["finished"].interrupts == (a1,)
+    assert statuses["finished"].pending_interrupts == ()
+    assert statuses["finished"].output == (("log", ["a:yes"]),)
+
+    assert not statuses["paused"].finished
+    assert statuses["paused"].interrupts == (a2,)
+    assert statuses["paused"].pending_interrupts == (a2,)
+    assert statuses["paused"].output == ()
+
+    assert statuses["no_output"].finished
+    assert statuses["no_output"].interrupts == (b,)
+    assert statuses["no_output"].pending_interrupts == ()
+
+    assert statuses["returned_none"].finished
+    assert statuses["returned_none"].output == ((RETURN, None),)
+
+    assert not statuses["failed"].finished
+    assert statuses["failed"].error is error