# python-1.45.0

Category: agent-infrastructure
Published: 2026-10-06T12:55:19Z
Source: [Semantic Kernel releases](https://github.com/microsoft/semantic-kernel/releases/tag/python-1.45.0)
Agent usefulness: 94/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-10-06T18:17:46.663Z
Tags: microsoft, semantic-kernel, orchestration

## Human Summary
Semantic Kernel Python release 1.45.0 removes unsupported Copilot Studio agent service auth modes, standardizes MCP tool naming, and includes various validation and bug fixes.

## Agent Summary
Semantic Kernel Python 1.45.0 introduces a breaking change removing unsupported service auth mode from Copilot Studio agent. Key improvements include standardized MCP server tool names, validated addresses for OpenAPI requests, CrewAI task ID validation, and session file download encoding fixes.

## Body
Semantic Kernel has released version 1.45.0 for Python (alongside associated .NET updates in the shared repository). This release features a breaking change in Python that removes unsupported service authentication modes for the Copilot Studio agent. Key additions and fixes for Python include aligning MCP server tool names, pinning validated addresses for OpenAPI plugin requests, validating CrewAI task identifiers, encoding and validating session download filenames, clarifying HttpPlugin defaults, fixing a Postgres filter bug, and adding User-Agent headers to google-genai. Several dependency updates and test maintenance tasks were also performed across the codebase.

## Recommended actions
- Verify Copilot Studio agent integrations in Python to ensure configurations do not rely on the removed unsupported service auth mode.
- Inspect integrations relying on MCP tool discovery to account for standardized tool names.
- Review OpenAPI plugin usages to accommodate pinned validated address enforcement.
- Update Python dependencies to semantic-kernel version 1.45.0.

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.