harness-sdk

What's Changed

• feat: add "anthropic" cache strategy to bypass model ID check by @kevmyung in https://github.com/strands-agents/sdk-python/pull/1808
• feat: serialize tool results as JSON when possible by @clareliguori in https://github.com/strands-agents/sdk-python/pull/1752
• fix: summary manager using structured output by @pgrayy in https://github.com/strands-agents/sdk-python/pull/1805
• feat(mcp): expose server instructions from InitializeResult on MCPClient by @ShotaroKataoka in https://github.com/strands-agents/sdk-python/pull/1814
• fix: added LANGFUSE_BASE_URL check for additinoal attribute by @poshinchen in https://github.com/strands-agents/sdk-python/pull/1826
• feat(session): add dirty flag to skip unnecessary agent state persistence by @Unshure in https://github.com/strands-agents/sdk-python/pull/1803
• feat: add public tool_spec setter by @mkmeral in https://github.com/strands-agents/sdk-python/pull/1822
• feat: add CancellationToken for graceful agent execution cancellation by @jgoyani1 in https://github.com/strands-agents/sdk-python/pull/1772
• feat(session): optimize session manager initialization by @Unshure in https://github.com/strands-agents/sdk-python/pull/1829
• fix(mistral): report usage metrics in streaming mode by @jackatorcflo in https://github.com/strands-agents/sdk-python/pull/1697
• fix(openai_responses): use output_text for assistant messages in multi-turn conversations by @giulio-leone in https://github.com/strands-agents/sdk-python/pull/1851
• feat(hooks): add resume flag to AfterInvocationEvent by @mkmeral in https://github.com/strands-agents/sdk-python/pull/1767
• fix: place cache point on last user message instead of assistant by @kevmyung in https://github.com/strands-agents/sdk-python/pull/1821
• feat(skills): add agent skills as a plugin by @mkmeral in https://github.com/strands-agents/sdk-python/pull/1755
• feat(steering): move steering from experimental to production by @dbschmigelski in https://github.com/strands-agents/sdk-python/pull/1853
• fix: break circular references so Agent cleanup doesn't hang with MCPClient by @dbschmigelski in https://github.com/strands-agents/sdk-python/pull/1830
• fix: Set is_new_session = False at the end of each initialize* method by @mehtarac in https://github.com/strands-agents/sdk-python/pull/1859

New Contributors

• @ShotaroKataoka made their first contribution in https://github.com/strands-agents/sdk-python/pull/1814
• @jgoyani1 made their first contribution in https://github.com/strands-agents/sdk-python/pull/1772
• @jackatorcflo made their first contribution in https://github.com/strands-agents/sdk-python/pull/1697
• @giulio-leone made their first contribution in https://github.com/strands-agents/sdk-python/pull/1851

Full Changelog: https://github.com/strands-agents/sdk-python/compare/v1.29.0...v1.30.0