See the following warning messages in my terminal:
/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/trustcall/_base.py:46: LangGraphDeprecatedSinceV10: Importing Send from langgraph.constants is deprecated. Please use 'from langgraph.types import Send' instead. Deprecated in LangGraph V1.0 to be removed in V2.0.
from langgraph.constants import Send
/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/trustcall/_base.py:46: LangGraphDeprecatedSinceV10: Importing Send from langgraph.constants is deprecated. Please use 'from langgraph.types import Send' instead. Deprecated in LangGraph V1.0 to be removed in V2.0.
from langgraph.constants import Send
/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/psycopg_pool/pool_async.py:163: RuntimeWarning: opening the async pool AsyncConnectionPool in the constructor is deprecated and will not be supported anymore in a future release. Please use `await pool.open()`, or use the pool as context manager using: `async with AsyncConnectionPool(...) as pool: `...
warnings.warn(
/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/jwt/api_jwt.py:365: InsecureKeyLengthWarning: The HMAC key is 8 bytes long, which is below the minimum recommended length of 64 bytes for SHA512. See RFC 7518 Section 3.2.
decoded = self.decode_complete(
/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/jwt/api_jwt.py:147: InsecureKeyLengthWarning: The HMAC key is 8 bytes long, which is below the minimum recommended length of 64 bytes for SHA512. See RFC 7518 Section 3.2.
return self._jws.encode(
/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/jwt/api_jwt.py:365: InsecureKeyLengthWarning: The HMAC key is 8 bytes long, which is below the minimum recommended length of 64 bytes for SHA512. See RFC 7518 Section 3.2.
decoded = self.decode_complete(
/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/jwt/api_jwt.py:365: InsecureKeyLengthWarning: The HMAC key is 8 bytes long, which is below the minimum recommended length of 64 bytes for SHA512. See RFC 7518 Section 3.2.
decoded = self.decode_complete(
/usr/src/Python/rag-agent/.venv/lib/python3.13/site-packages/jwt/api_jwt.py:365: InsecureKeyLengthWarning: The HMAC key is 8 bytes long, which is below the minimum recommended length of 64 bytes for SHA512. See RFC 7518 Section 3.2.
What are the causes and how to get rid of them? I am concerned about the `InsecureKeyLengthWarning` which could have security impact if not addressed.
System Information
------------------
> OS: Linux
> OS Version: #20-Ubuntu SMP PREEMPT_DYNAMIC Fri Mar 13 20:07:29 UTC 2026
> Python Version: 3.13.7 (main, Mar 3 2026, 12:19:54) [GCC 15.2.0]
Package Information
-------------------
> langchain_core: 0.3.45
> langchain: 0.3.20
> langchain_community: 0.3.19
> langsmith: 0.3.15
> langchain_google_genai: 2.1.0
> langchain_google_vertexai: 2.0.15
> langchain_openai: 0.3.8
> langchain_text_splitters: 0.3.6
> langgraph_api: 0.2.38
> langgraph_cli: 0.2.10
> langgraph_license: Installed. No version info available.
> langgraph_runtime: Installed. No version info available.
> langgraph_runtime_inmem: 0.2.0
> langgraph_sdk: 0.1.70
Optional packages not installed
-------------------------------
> langserve
Other Dependencies
------------------
> aiohttp<4.0.0,>=3.8.3: Installed. No version info available.
> anthropic[vertexai]: Installed. No version info available.
> async-timeout<5.0.0,>=4.0.0;: Installed. No version info available.
> blockbuster<2.0.0,>=1.5.24: Installed. No version info available.
> click: 8.1.8
> cloudpickle>=3.0.0: Installed. No version info available.
> cryptography<45.0,>=42.0.0: Installed. No version info available.
> dataclasses-json<0.7,>=0.5.7: Installed. No version info available.
> filetype: 1.2.0
> google-ai-generativelanguage: 0.6.16
> google-cloud-aiplatform: 1.84.0
> google-cloud-storage: 2.19.0
> httpx: 0.28.1
> httpx-sse: 0.4.0
> httpx-sse<1.0.0,>=0.4.0: Installed. No version info available.
> httpx>=0.25.0: Installed. No version info available.
> httpx>=0.25.2: Installed. No version info available.
> jsonpatch<2.0,>=1.33: Installed. No version info available.
> jsonschema-rs<0.30,>=0.20.0: Installed. No version info available.
> langchain-anthropic;: Installed. No version info available.
> langchain-aws;: Installed. No version info available.
> langchain-cohere;: Installed. No version info available.
> langchain-community;: Installed. No version info available.
> langchain-core<1.0.0,>=0.3.34: Installed. No version info available.
> langchain-core<1.0.0,>=0.3.41: Installed. No version info available.
> langchain-core<1.0.0,>=0.3.42: Installed. No version info available.
> langchain-core>=0.2.38: Installed. No version info available.
> langchain-deepseek;: Installed. No version info available.
> langchain-fireworks;: Installed. No version info available.
> langchain-google-genai;: Installed. No version info available.
> langchain-google-vertexai;: Installed. No version info available.
> langchain-groq;: Installed. No version info available.
> langchain-huggingface;: Installed. No version info available.
> langchain-mistralai: Installed. No version info available.
> langchain-mistralai;: Installed. No version info available.
> langchain-ollama;: Installed. No version info available.
> langchain-openai;: Installed. No version info available.
> langchain-text-splitters<1.0.0,>=0.3.6: Installed. No version info available.
> langchain-together;: Installed. No version info available.
> langchain-xai;: Installed. No version info available.
> langchain<1.0.0,>=0.3.20: Installed. No version info available.
> langgraph-checkpoint>=2.0.23: Installed. No version info available.
> langgraph-checkpoint>=2.0.25: Installed. No version info available.
> langgraph-runtime-inmem<0.3,>=0.2.0: Installed. No version info available.
> langgraph-sdk>=0.1.66: Installed. No version info available.
> langgraph>=0.2: Installed. No version info available.
> langgraph>=0.3.27: Installed. No version info available.
> langsmith-pyo3: Installed. No version info available.
> langsmith<0.4,>=0.1.125: Installed. No version info available.
> langsmith<0.4,>=0.1.17: Installed. No version info available.
> langsmith>=0.1.112: Installed. No version info available.
> numpy<3,>=1.26.2: Installed. No version info available.
> openai-agents: Installed. No version info available.
> openai<2.0.0,>=1.58.1: Installed. No version info available.
> orjson: 3.10.15
> orjson>=3.10.1: Installed. No version info available.
> orjson>=3.9.7: Installed. No version info available.
> packaging: 24.2
> packaging<25,>=23.2: Installed. No version info available.
> pydantic: 2.10.6
> pydantic-settings<3.0.0,>=2.4.0: Installed. No version info available.
> pydantic<3.0.0,>=2.5.2;: Installed. No version info available.
> pydantic<3.0.0,>=2.7.4: Installed. No version info available.
> pydantic<3.0.0,>=2.7.4;: Installed. No version info available.
> pyjwt>=2.9.0: Installed. No version info available.
> pytest: Installed. No version info available.
> python-dotenv: 1.0.1
> PyYAML>=5.3: Installed. No version info available.
> requests: 2.32.3
> requests-toolbelt: 1.0.0
> requests<3,>=2: Installed. No version info available.
> rich: 13.9.4
> SQLAlchemy<3,>=1.4: Installed. No version info available.
> sse-starlette<2.2.0,>=2.1.0: Installed. No version info available.
> sse-starlette>=2: Installed. No version info available.
> starlette>=0.37: Installed. No version info available.
> starlette>=0.38.6: Installed. No version info available.
> structlog<26,>=24.1.0: Installed. No version info available.
> structlog>23: Installed. No version info available.
> tenacity!=8.4.0,<10,>=8.1.0: Installed. No version info available.
> tenacity!=8.4.0,<10.0.0,>=8.1.0: Installed. No version info available.
> tenacity>=8.0.0: Installed. No version info available.
> tiktoken<1,>=0.7: Installed. No version info available.
> truststore>=0.1: Installed. No version info available.
> typing-extensions>=4.7: Installed. No version info available.
> uvicorn>=0.26.0: Installed. No version info available.
> watchfiles>=0.13: Installed. No version info available.
> zstandard: 0.23.0