Pydantic deprecation warning: Support for class-based `config` is deprecated, use ConfigDict instead

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
78/100
Issue type
Bug
Clarity
Clearly specified
Activity status
Quiet
Tech stack
python
Domain
backend

Research direction

The warning is emitted while defining RequestContext in bedrock_agentcore/runtime/context.py:12; start by reading that class and its Pydantic configuration. Reproduce it with the documented Python REPL import, then verify that importing BedrockAgentCoreApp no longer emits the deprecation warning.

Written by the indexing model from the issue text.

Description

On import of BedrockAgentCoreApp a Pydantic deprecation warning occurs, e.g. during pytest runs. Besides noise, it is confusing since it is not clear if the issue is in application or Bedrock SDK code.

To Reproduce

  1. open a python REPL
  2. import BedrockAgentCoreApp
✗ python                                   
Python 3.13.11 (main, Dec  5 2025, 16:06:33) [Clang 17.0.0 (clang-1700.6.3.2)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
Cmd click to launch VS Code Native REPL
>>> import warnings
>>> warnings.simplefilter("always")
>>> from bedrock_agentcore import BedrockAgentCoreApp
[REDACTED]/.venv/lib/python3.13/site-packages/bedrock_agentcore/runtime/context.py:12: PydanticDeprecatedSince20: Support for class-based `config` is deprecated, use ConfigDict instead. Deprecated in Pydantic V2.0 to be removed in V3.0. See Pydantic V2 Migration Guide at https://errors.pydantic.dev/2.12/migration/
  class RequestContext(BaseModel):

Expected behavior
No deprecation warning.

Desktop (please complete the following information):

  • OS: macOS
  • Browser n/a
  • Version 26.3

Additional context
bedrock-agentcore Version: 1.4.4
I'm using pydantic Version: 2.12.5, as required by bedrock-agentcore, mcp, pydantic-settings, strands-agents

Dominant language
Python
Stars
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Forks
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Avg merge
1d 19h
Merged PRs (30d)
7

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