fix: move to gpt 5.2 codex and run formatter (#967)

apps/agent/agent/integrations/langsmith.py

@@ -9,7 +9,7 @@ import contextlib
 import os
 import time
 from abc import ABC, abstractmethod
-from typing import TYPE_CHECKING, Any
+from typing import Any
 
 from deepagents.backends.protocol import (
     ExecuteResponse,
@@ -19,7 +19,6 @@ from deepagents.backends.protocol import (
     WriteResult,
 )
 from deepagents.backends.sandbox import BaseSandbox
-
 from langsmith.sandbox import Sandbox, SandboxClient, SandboxTemplate
 
 
@@ -148,9 +147,7 @@ class LangSmithBackend(BaseSandbox):
         responses: list[FileDownloadResponse] = []
         for path in paths:
             content = self._sandbox.read(path)
-            responses.append(
-                FileDownloadResponse(path=path, content=content, error=None)
-            )
+            responses.append(FileDownloadResponse(path=path, content=content, error=None))
         return responses
 
     def upload_files(self, files: list[tuple[str, bytes]]) -> list[FileUploadResponse]:
@@ -209,10 +206,7 @@ class LangSmithProvider(SandboxProvider):
                 template_name=resolved_template_name, timeout=timeout
             )
         except Exception as e:
-            msg = (
-                f"Failed to create sandbox from template "
-                f"'{resolved_template_name}': {e}"
-            )
+            msg = f"Failed to create sandbox from template '{resolved_template_name}': {e}"
             raise RuntimeError(msg) from e
 
         # Verify sandbox is ready by polling

apps/agent/agent/middleware/open_pr.py

@@ -181,16 +181,12 @@ I've {action} pull request to address this issue:
 
         logger.info("Changes detected, preparing PR for thread %s", thread_id)
 
-        current_branch = await asyncio.to_thread(
-            git_current_branch, sandbox_backend, repo_dir
-        )
+        current_branch = await asyncio.to_thread(git_current_branch, sandbox_backend, repo_dir)
 
         target_branch = f"open-swe/{thread_id}"
 
         if current_branch != target_branch:
-            await asyncio.to_thread(
-                git_checkout_branch, sandbox_backend, repo_dir, target_branch
-            )
+            await asyncio.to_thread(git_checkout_branch, sandbox_backend, repo_dir, target_branch)
 
         await asyncio.to_thread(
             git_config_user,

apps/agent/agent/server.py

@@ -4,7 +4,6 @@
 # Suppress deprecation warnings from langchain_core (e.g., Pydantic V1 on Python 3.14+)
 # ruff: noqa: E402
 import logging
-import os
 import warnings
 
 logger = logging.getLogger(__name__)
@@ -24,11 +23,10 @@ warnings.filterwarnings("ignore", message=".*Pydantic V1.*", category=UserWarnin
 # Now safe to import agent (which imports LangChain modules)
 from deepagents import create_deep_agent
 from deepagents.backends.protocol import SandboxBackendProtocol
-
-# Local import for encryption
-from langchain_anthropic import ChatAnthropic
+from langchain_openai import ChatOpenAI
 
 from .encryption import decrypt_token
+from .integrations.langsmith import _create_langsmith_sandbox
 from .middleware import (
     ToolErrorMiddleware,
     check_message_queue_before_model,
@@ -37,8 +35,6 @@ from .middleware import (
 )
 from .prompt import construct_system_prompt
 from .tools import commit_and_open_pr, fetch_url, http_request
-from .integrations.langsmith import _create_langsmith_sandbox
-
 
 client = get_client()
 
@@ -46,12 +42,12 @@ SANDBOX_CREATING = "__creating__"
 SANDBOX_CREATION_TIMEOUT = 180
 SANDBOX_POLL_INTERVAL = 1.0
 
-from .utils.sandbox_state import SANDBOX_BACKENDS, get_sandbox_id_from_metadata
 from .utils.github import (
     git_has_uncommitted_changes,
     is_valid_git_repo,
     remove_directory,
 )
+from .utils.sandbox_state import SANDBOX_BACKENDS, get_sandbox_id_from_metadata
 
 
 async def _clone_or_pull_repo_in_sandbox(  # noqa: PLR0915
@@ -87,9 +83,7 @@ async def _clone_or_pull_repo_in_sandbox(  # noqa: PLR0915
     is_git_repo = await loop.run_in_executor(None, is_valid_git_repo, sandbox_backend, repo_dir)
 
     if not is_git_repo:
-        logger.warning(
-            "Repo directory missing or not a valid git repo at %s, removing", repo_dir
-        )
+        logger.warning("Repo directory missing or not a valid git repo at %s, removing", repo_dir)
         try:
             removed = await loop.run_in_executor(None, remove_directory, sandbox_backend, repo_dir)
             if not removed:
@@ -336,7 +330,7 @@ async def get_agent(config: RunnableConfig) -> Pregel:  # noqa: PLR0915
 
     logger.info("Returning agent with sandbox for thread %s", thread_id)
     return create_deep_agent(
-        model=ChatAnthropic(model="claude-opus-4-6", max_tokens=20_000),
+        model=ChatOpenAI(model="gpt-5.2-codex", temperature=0, max_tokens=20_000),
         system_prompt=construct_system_prompt(
             repo_dir,
             linear_project_id=linear_project_id,

apps/agent/agent/tools/commit_and_open_pr.py

@@ -181,9 +181,7 @@ def commit_and_open_pr(
                 "pr_url": None,
             }
 
-        base_branch = asyncio.run(
-            get_github_default_branch(repo_owner, repo_name, github_token)
-        )
+        base_branch = asyncio.run(get_github_default_branch(repo_owner, repo_name, github_token))
         pr_url, _pr_number, pr_existing = asyncio.run(
             create_github_pr(
                 repo_owner=repo_owner,

apps/agent/agent/utils/github.py

@@ -37,24 +37,18 @@ def remove_directory(sandbox_backend: SandboxBackendProtocol, repo_dir: str) ->
     return result.exit_code == 0
 
 
-def git_has_uncommitted_changes(
-    sandbox_backend: SandboxBackendProtocol, repo_dir: str
-) -> bool:
+def git_has_uncommitted_changes(sandbox_backend: SandboxBackendProtocol, repo_dir: str) -> bool:
     """Check whether the repo has uncommitted changes."""
     result = _run_git(sandbox_backend, repo_dir, "git status --porcelain")
     return result.exit_code == 0 and bool(result.output.strip())
 
 
-def git_fetch_origin(
-    sandbox_backend: SandboxBackendProtocol, repo_dir: str
-) -> ExecuteResponse:
+def git_fetch_origin(sandbox_backend: SandboxBackendProtocol, repo_dir: str) -> ExecuteResponse:
     """Fetch latest from origin (best-effort)."""
     return _run_git(sandbox_backend, repo_dir, "git fetch origin 2>/dev/null || true")
 
 
-def git_has_unpushed_commits(
-    sandbox_backend: SandboxBackendProtocol, repo_dir: str
-) -> bool:
+def git_has_unpushed_commits(sandbox_backend: SandboxBackendProtocol, repo_dir: str) -> bool:
     """Check whether there are commits not pushed to upstream."""
     git_log_cmd = (
         "git log --oneline @{upstream}..HEAD 2>/dev/null "
@@ -75,9 +69,7 @@ def git_checkout_branch(
 ) -> bool:
     """Checkout branch, creating it if needed."""
     safe_branch = shlex.quote(branch)
-    checkout_result = _run_git(
-        sandbox_backend, repo_dir, f"git checkout -b {safe_branch}"
-    )
+    checkout_result = _run_git(sandbox_backend, repo_dir, f"git checkout -b {safe_branch}")
     if checkout_result.exit_code == 0:
         return True
     fallback = _run_git(sandbox_backend, repo_dir, f"git checkout {safe_branch}")
@@ -97,9 +89,7 @@ def git_config_user(
     _run_git(sandbox_backend, repo_dir, f"git config user.email {safe_email}")
 
 
-def git_add_all(
-    sandbox_backend: SandboxBackendProtocol, repo_dir: str
-) -> ExecuteResponse:
+def git_add_all(sandbox_backend: SandboxBackendProtocol, repo_dir: str) -> ExecuteResponse:
     """Stage all changes."""
     return _run_git(sandbox_backend, repo_dir, "git add -A")
 
@@ -112,9 +102,7 @@ def git_commit(
     return _run_git(sandbox_backend, repo_dir, f"git commit -m {safe_message}")
 
 
-def git_get_remote_url(
-    sandbox_backend: SandboxBackendProtocol, repo_dir: str
-) -> str | None:
+def git_get_remote_url(sandbox_backend: SandboxBackendProtocol, repo_dir: str) -> str | None:
     """Get the origin remote URL."""
     result = _run_git(sandbox_backend, repo_dir, "git remote get-url origin")
     if result.exit_code != 0:

apps/agent/agent/webapp.py

@@ -76,9 +76,11 @@ LINEAR_TEAM_TO_REPO: dict[str, dict[str, Any] | dict[str, str]] = {
             "open-swe-v3-test": {"owner": "aran-yogesh", "name": "nimedge"},
             "open-swe-dev-test": {"owner": "aran-yogesh", "name": "TalkBack"},
         },
-        "default": {"owner": "aran-yogesh", "name": "TalkBack"}  # Fallback for issues without project
+        "default": {
+            "owner": "aran-yogesh",
+            "name": "TalkBack",
+        },  # Fallback for issues without project
     },
-
     "LangChain OSS": {
         "projects": {
             "deepagents": {"owner": "langchain-ai", "name": "deepagents"},
@@ -91,9 +93,7 @@ LINEAR_TEAM_TO_REPO: dict[str, dict[str, Any] | dict[str, str]] = {
         },
         "default": {"owner": "langchain-ai", "name": "ai-sdr"},
     },
-    "Docs": {
-        "default": {"owner": "langchain-ai", "name": "docs"}
-    },
+    "Docs": {"default": {"owner": "langchain-ai", "name": "docs"}},
 }
 
 

apps/agent/pyproject.toml

@@ -27,6 +27,7 @@ dependencies = [
     "langgraph-cli[inmem]>=0.4.12",
     # LangSmith SDK for sandbox management
     "langsmith>=0.7.1",
+    "langchain-openai==1.1.10",
 ]
 
 [project.optional-dependencies]