Adding files and image support for Slack

[manoj-bandara]

Description

This contain code changes to add files and image support for Slack

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test update
• CI/CD update
• Other (please describe):

Related Issues

#167

Testing

• Unit tests pass locally
• Integration tests pass locally
• Manual testing completed
• New tests added for changes

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my code
• [x ] I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published

[Copilot]

Pull request overview

This pull request adds file and image attachment support to the Slack integration, allowing the bot to process images and documents (except audio/video) sent by users in Slack messages.

Key Changes:

• Added httpx dependency to enable downloading files from Slack's private URLs
• Implemented file processing logic that downloads, base64-encodes, and categorizes attachments as either images or files
• Added audio/video file rejection with user feedback to prevent unsupported media types

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
examples/api/slack/README.md	Corrected path reference from integrations to integration
ak-py/uv.lock	Added httpx dependency to slack extras and updated lock file revision
ak-py/pyproject.toml	Added httpx>=0.27.0 as a dependency for slack extras
ak-py/src/agentkernel/integration/slack/slack_chat.py	Implemented file/image download, processing, and integration with agent service using run_multi
ak-py/src/agentkernel/integration/slack/README.md	Updated OAuth scopes documentation and added limitation notes about file/image handling in chat history

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[Copilot]

Pull request overview

Copilot reviewed 4 out of 5 changed files in this pull request and generated 8 comments.

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[Copilot]

Pull request overview

Copilot reviewed 8 out of 9 changed files in this pull request and generated 3 comments.

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