strands-agents release 08/19/2025

[pgrayy]

Hi, everyone! We completed a patch release for the SDK, tools and docs.

• Docs: https://strandsagents.com/1.5.x/
• https://pypi.org/project/strands-agents/1.5.0/#description
• https://pypi.org/project/strands-agents-tools/0.2.4/#description
• https://pypi.org/project/strands-agents-builder/0.1.8/#description

For details on the changes, please refer to the release notes:

• sdk-python
• tools
• agent-builder

[pgrayy]

sdk-python

• fix: only set signature in message if signature was provided by the model (fix: only set signature in message if signature was provided by the model #682)
• session manager - prevent file path injection (session manager - prevent file path injection #680)
• feat: expose tool_use and agent through ToolContext to decorated tools (feat: expose tool_use and agent through ToolContext to decorated tools #557)
• litellm - set 1.73.1 as minimum version (litellm - set 1.73.1 as minimum version #668)
• feat: add structured_output_span (feat: add structured_output_span #655)
• fix: Bedrock hang when exception occurs during message conversion (fix: Properly handle prompt=None & avoid agent hanging #643)
• feat: Add configuration option to MCP Client for server init timeout (feat: Add configuration option to MCP Client for server init timeout #657)
• chore: request to include code snippet section (chore: request to include code snippet section #654)
• feature(graph): Allow cyclic graphs (feature(graph): Allow cyclic graphs #497)

tools

• fix(slack): adapt to SDK system prompt changes and improve agent model inheritance ([FEATURE] Bidirectional Streaming #217)
• fix(code_interpreter): improve code_interpreter docstring ([BUG] OpenAIModel with custom base URL fails when using tool messages #215)
• Add env implementation in python_repl and needs_confirmation in environment tool (fix: update direct tool call references #56)
• chore(a2a): private webhook variables ([FEATURE] Strands Agents should provide a built-in intent confidence #211)
• docs: Use keyword arguments in usage example ([BUG] opt/python/opentelemetry on lambda #195)
• Add push notification support to A2AClientToolProvider (fix: add inference profile to litellm test and remove ownership check… #209)
• add: open_diagram_flag whether to open the diagram after creation ([BUG] openAI stream() method does not enforce "stream=True" in the upstream API call #210)
• Feat/update readme (chore(deps): relax docstring_parser version to allow 0.16 #203)
• docs: Use keyword arguments and initialize a session. ([FEATURE] LlamaFirewall support in Strands SDK #196)
• Feat/tavily (Add permission block to call-tst-lint job #186)
• feat: Add strands-agents user agent to boto clients (fix: Handle empty choices in OpenAI model provider #185)
• refactor(a2a): upgrade to ClientFactory (feat: Adding portkey.ai gateway as a custom model #197)
• feat: Add additional intructions for contributors to find issues that are ready to be worked on ([FEATURE] Add configurable limits for cycles, token counts, and overall runtime #191)
• Add identifier to AgentCoreBrowser ([FEATURE] Configure the number of responses / chuncks when using BEDROCK KB #188)

agent-builder

• feat: add end to end integration test (Amazon SageMaker AI Model Provider implementation #30)