Sourced from aws-lambda-powertools's releases.

v3.14.0

Summary

This release introduces a new BedrockAgentFunctionResolver to Event Handler that simplifies connecting AWS Lambda functions to Amazon Bedrock Agents. This feature eliminates the need to write boilerplate code for parsing requests and formatting responses, allowing you to focus on your agent's business logic.

We would also like to extend a huge thank you to our new contributor @​LucasCMFBraga ⭐

Creating Amazon Bedrock Agents

Docs

You can now use the new BedrockAgentFunctionResolver to register tools and handle requests in your Lambda functions. The resolver will automatically parse the request, route it to the appropriate function, and return a well-formed response that includes the tool's output and any existing session attributes.

By default, errors are handled gracefully and returned to the agent with error type and message information, allowing the conversation to continue. This is useful when you want to let the LLM handle errors and reduce boilerplate error-handling code.

If you need more control over error scenarios, you can use BedrockFunctionResponse to customize the response and determine if the conversation should continue:

You can also use the BedrockFunctionResponse when you want to enrich the response with session attributes or knowledge base configurations, or when you want the agent to re-prompt the user to provide additional information.

Changes

🌟New features and non-breaking changes

• feat(bedrock_agent): add new Amazon Bedrock Agents Functions Resolver (#6564) by @​anafalcao
• feat(event_handler): enable support for custom deserializer to parse the request body (#6601) by @​LucasCMFBraga

📜 Documentation updates

• docs(public_reference): add Instil as a public reference (#6763) by @​leandrodamascena

🐛 Bug and hot fixes

• fix(event_handler): fix OpenAPI schema response for disabled validation (#6720) by @​leandrodamascena

🔧 Maintenance

• chore(deps-dev): bump boto3-stubs from 1.38.28 to 1.38.29 (#6764) by @dependabot[bot]
• chore(deps): bump mkdocstrings-python from 1.16.11 to 1.16.12 (#6765) by @dependabot[bot]
• chore(deps): bump mkdocstrings-python from 1.16.11 to 1.16.12 in /docs (#6768) by @dependabot[bot]
• chore(deps-dev): bump aws-cdk-aws-lambda-python-alpha from 2.200.0a0 to 2.200.1a0 (#6766) by @dependabot[bot]
• chore(deps-dev): bump aws-cdk-lib from 2.200.0 to 2.200.1 (#6767) by @dependabot[bot]
• chore(deps-dev): bump aws-cdk-aws-lambda-python-alpha from 2.199.0a0 to 2.200.0a0 (#6758) by @dependabot[bot]
• chore(deps-dev): bump boto3-stubs from 1.38.27 to 1.38.28 (#6756) by @dependabot[bot]
• chore(deps-dev): bump cfn-lint from 1.35.3 to 1.35.4 (#6755) by @dependabot[bot]
• chore(deps-dev): bump pytest from 8.3.5 to 8.4.0 (#6757) by @dependabot[bot]

... (truncated)

Sourced from aws-lambda-powertools's changelog.

[v3.14.0] - 2025-06-03

Bug Fixes

• event_handler: fix OpenAPI schema response for disabled validation (#6720)

Features

• bedrock_agent: add new Amazon Bedrock Agents Functions Resolver (#6564)
• event_handler: enable support for custom deserializer to parse the request body (#6601)

Maintenance

• version bump
• ci: new pre-release 3.13.1a7 (#6759)
• ci: new pre-release 3.13.1a0 (#6696)
• ci: new pre-release 3.13.1a6 (#6751)
• ci: new pre-release 3.13.1a1 (#6704)
• ci: new pre-release 3.13.1a2 (#6709)
• ci: new pre-release 3.13.1a5 (#6744)
• ci: new pre-release 3.13.1a4 (#6738)
• ci: add missing dependency to build docs (#6717)
• ci: new pre-release 3.13.1a3 (#6732)
• deps: bump pydantic from 2.11.4 to 2.11.5 (#6711)
• deps: bump mkdocstrings-python from 1.16.10 to 1.16.11 (#6724)
• deps: bump redis from 6.1.0 to 6.2.0 (#6736)
• deps: bump ossf/scorecard-action from 2.4.1 to 2.4.2 (#6746)
• deps: bump mkdocstrings-python from 1.16.10 to 1.16.11 in /docs (#6722)
• deps: bump datadog-lambda from 6.109.0 to 6.110.0 (#6714)
• deps-dev: bump pytest-mock from 3.14.0 to 3.14.1 (#6723)
• deps-dev: bump pytest-xdist from 3.6.1 to 3.7.0 (#6730)
• deps-dev: bump aws-cdk-lib from 2.198.0 to 2.199.0 (#6731)
• deps-dev: bump aws-cdk-aws-lambda-python-alpha from 2.197.0a0 to 2.198.0a0 (#6715)
• deps-dev: bump aws-cdk-aws-lambda-python-alpha from 2.198.0a0 to 2.199.0a0 (#6729)
• deps-dev: bump coverage from 7.8.1 to 7.8.2 (#6713)
• deps-dev: bump boto3-stubs from 1.38.22 to 1.38.23 (#6712)
• deps-dev: bump aws-cdk from 2.1016.1 to 2.1017.0 (#6734)
• deps-dev: bump boto3-stubs from 1.38.23 to 1.38.25 (#6735)
• deps-dev: bump ruff from 0.11.11 to 0.11.12 (#6741)
• deps-dev: bump boto3-stubs from 1.38.25 to 1.38.26 (#6742)
• deps-dev: bump cfn-lint from 1.35.1 to 1.35.3 (#6708)
• deps-dev: bump ruff from 0.11.10 to 0.11.11 (#6706)
• deps-dev: bump boto3-stubs from 1.38.21 to 1.38.22 (#6707)
• deps-dev: bump aws-cdk from 2.1016.0 to 2.1016.1 (#6703)
• deps-dev: bump aws-cdk from 2.1017.0 to 2.1017.1 (#6748)
• deps-dev: bump boto3-stubs from 1.38.26 to 1.38.27 (#6747)
• deps-dev: bump coverage from 7.8.0 to 7.8.1 (#6701)
• deps-dev: bump aws-cdk-aws-lambda-python-alpha from 2.196.1a0 to 2.197.0a0 (#6700)
• deps-dev: bump aws-cdk-lib from 2.196.1 to 2.197.0 (#6699)
• deps-dev: bump pytest from 8.3.5 to 8.4.0 (#6757)
• deps-dev: bump cfn-lint from 1.35.3 to 1.35.4 (#6755)

... (truncated)

Sourced from aws-lambda-powertools's upgrade guide.

---

title: Upgrade guide description: Guide to update between major Powertools for AWS Lambda (Python) versions

End of support v2

!!! warning "On March 25st, 2025, Powertools for AWS Lambda (Python) v2 reached end of support and will no longer receive updates or releases. If you are still using v2, we strongly recommend you to read our upgrade guide and update to the latest version."

Given our commitment to all of our customers using Powertools for AWS Lambda (Python), we will keep Pypi{target="_blank"} v2 releases and documentation 2.x versions to prevent any disruption.

Migrate to v3 from v2

!!! info "We strongly encourage you to migrate to v3. However, if you still need to upgrade from v1 to v2, you can find the upgrade guide."

We've made minimal breaking changes to make your transition to v3 as smooth as possible.

Quick summary

Area	Change	Code change required
Pydantic	We have removed support for Pydantic v1	No
Parser	We have replaced DynamoDBStreamModel AttributeValue with native Python types	Yes
Parser	We no longer export Pydantic objects from parser.pydantic.	Yes
Lambda layer	Lambda layers are now compiled according to the specific Python version and architecture	No
Event Handler	We have deprecated the get_header_value function.	Yes
Batch Processor	@batch_processor and @async_batch_processor decorators are now deprecated	Yes
Event Source Data Classes	We have updated default values for optional fields.	Yes
Parameters	The default cache TTL is now set to 5 minutes	No
Parameters	The config parameter is deprecated in favor of boto_config	Yes
JMESPath Functions	The extract_data_from_envelope function is deprecated in favor of query	Yes
Types file	We have removed the type imports from the shared/types.py file	Yes

First Steps

Before you start, we suggest making a copy of your current working project or create a new branch with git.

1. Upgrade Python to at least v3.9.
2. Ensure you have the latest version via Lambda Layer or PyPi{target="_blank"}.
3. Review the following sections to confirm if you need to make changes to your code.

Drop support for Pydantic v1

!!! note "No code changes required"

As of June 30, 2024, Pydantic v1 has reached its end-of-life, and we have discontinued support for this version. We now exclusively support Pydantic v2.

Use Pydantic v2 Migration Guide{target="_blank"} to migrate your custom Pydantic models to v2.

... (truncated)

• d1e668a chore: version bump
• 1a1f7df chore(ci): changelog rebuild (#6760)
• b66665c feat(bedrock_agent): add new Amazon Bedrock Agents Functions Resolver (#6564)
• 9c16b81 chore(ci): new pre-release 3.13.1a7 (#6759)
• 69e5e0f chore(deps-dev): bump aws-cdk-aws-lambda-python-alpha from 2.199.0a0 to 2.200...
• b584739 chore(deps-dev): bump boto3-stubs from 1.38.27 to 1.38.28 (#6756)
• 10bfa5f chore(deps-dev): bump cfn-lint from 1.35.3 to 1.35.4 (#6755)
• 85ca2cb chore(deps-dev): bump pytest from 8.3.5 to 8.4.0 (#6757)
• 3077eba chore(ci): changelog rebuild (#6752)
• 68a0482 chore(ci): new pre-release 3.13.1a6 (#6751)
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