⚠️ Solace Agent Mesh plugins in Python are now deprecated

👋 Thank you to everyone who's used the Solace Agent Mesh plugins! This Python version is now deprecated — it's no longer under active development and won't receive new features, bug fixes or security updates.

🚀 Check out the new version of Solace Agent Mesh → https://docs.solace.com/Agent-Mesh/agent-mesh.htm

🖥️ A free edition of the Solace Agent Mesh desktop app is available: https://solace.com/products/agent-mesh/download

These packages remain installable; the repository will be archived (read-only) for reference.

Slack Gateway Adapter SAM Plugin

This plugin provides a Slack gateway adapter for the Solace Agent Mesh framework using the new generic gateway framework. It allows you to interact with Slack channels and messages, enabling bi-directional communication between Slack users and SAM agents.

About Solace Agent Mesh

Solace Agent Mesh (SAM) is an open-source framework for building event-driven, multi-agent AI systems where specialized agents collaborate on complex tasks. It provides a standardized way for agents to communicate, share data, and integrate with external systems while keeping components loosely coupled and production-ready.

SAM helps you:

• Build event-driven multi-agent systems on Solace Event Mesh
• Connect agents, tools, gateways, and services through a common runtime
• Extend projects with installable plugins such as sam-slack-gateway-adapter

Learn more in the Solace Agent Mesh documentation and the main project repository.

Overview

The Slack Gateway Adapter is a complete replacement for the legacy sam-slack plugin, built on the modern SAM gateway architecture. It provides:

• Socket Mode Integration: Real-time communication with Slack via WebSocket
• Rich Message Support: Text, files, images, and structured data
• Thread Management: Maintains conversation context in Slack threads
• User Authentication: Maps Slack users to SAM identity via email
• Embed Resolution: Automatically resolves and processes embedded artifacts
• Feedback Collection: Optional integration with feedback services

Installation

Once the plugin is installed (e.g., from PyPI or a local wheel file):

sam plugin add <your-new-component-name> --plugin sam-slack-gateway-adapter

This will create a new component configuration at configs/plugins/<your-new-component-name-kebab-case>.yaml.

Configuration

Required Environment Variables

• SLACK_BOT_TOKEN: Your Slack Bot Token (starts with 'xoxb-')
• SLACK_APP_TOKEN: Your Slack App Token for Socket Mode (starts with 'xapp-')
• NAMESPACE: The SAM namespace for your deployment

Slack App Setup

To use this plugin, you need to create a Slack App with the following configurations:

1. Socket Mode: Enable Socket Mode in your Slack App settings

2. Bot Token Scopes: Add the following OAuth scopes:

   • app_mentions:read - View messages that directly mention your app
   • chat:write - Send messages as the app
   • files:read - View files shared in channels and conversations
   • files:write - Upload, edit, and delete files as the app
   • channels:history - View messages and other content in public channels
   • groups:history - View messages and other content in private channels
   • im:history - View messages and other content in direct messages
   • mpim:history - View messages and other content in group direct messages
   • users:read - View people in the workspace
   • users:read.email - View email addresses of people in the workspace

3. Event Subscriptions: Subscribe to the following bot events:

   • app_mention - When your app is mentioned in a channel
   • message.channels - Messages in public channels
   • message.groups - Messages in private channels
   • message.im - Direct messages to your app
   • message.mpim - Group direct messages

Configuration Options

The main configuration options in your component YAML file:

app_config:
  # Gateway Configuration
  namespace: "${NAMESPACE}"
  gateway_id: my-slack-gateway-01  # Auto-generated if omitted
  default_agent_name: "OrchestratorAgent"  # Agent to use if no mention specifies one

  # Slack Adapter-Specific Config
  adapter_config:
    slack_bot_token: ${SLACK_BOT_TOKEN}
    slack_app_token: ${SLACK_APP_TOKEN}
    slack_initial_status_message: ":thinking_face: Thinking..."  # Set empty "" to disable
    correct_markdown_formatting: true
    slack_email_cache_ttl_seconds: 3600  # Cache user email lookups for 1 hour
    feedback_enabled: false  # Enable to show thumbs up/down feedback buttons

  # Embed Resolution
  enable_embed_resolution: true
  gateway_artifact_content_limit_bytes: 10000000  # 10MB
  gateway_recursive_embed_depth: 3

  # Authorization
  authorization_service:
    type: "none"  # Or "default_rbac"

Usage

Interacting with the Gateway

Once deployed, users can interact with your SAM agents via Slack:

1. Direct Mention: @YourBot what is the weather today?
2. Direct Message: Send a DM to your bot
3. Thread Replies: Continue conversations in threads

Agent Selection

• Default Agent: Messages without a specific agent mention use default_agent_name
• Specific Agent: Mention an agent by name: @YourBot @WeatherAgent what's the forecast?

File Attachments

The adapter automatically processes files attached to Slack messages and makes them available to agents as artifacts.

Features

Message Queue Management

The adapter includes intelligent message queue management to:

• Handle rate limits gracefully
• Batch status updates efficiently
• Prevent duplicate messages
• Manage thread contexts

Markdown Formatting

Slack markdown differs from standard markdown. The adapter can automatically convert:

• Code blocks and inline code
• Bold and italic text
• Lists and formatting
• Links and mentions

Set correct_markdown_formatting: true to enable automatic conversion.

User Feedback Collection

The adapter supports optional thumbs up/down feedback collection on task completions:

1. Enable in adapter config:

   adapter_config:
     feedback_enabled: true
   

2. Configure feedback publishing (optional - if you want to send feedback to an external service):

   feedback_publishing:
     enabled: true
     feedback_post_url: "http://your-feedback-service.example.com/feedback"
     feedback_post_headers:
       Authorization: "Bearer your_feedback_token"
       Content-Type: "application/json"
   

When enabled, users will see thumbs up/down buttons after task completion. They can optionally provide text comments. Feedback is submitted via the SAM feedback mechanism.

Error Handling

Errors are gracefully reported back to users in Slack with helpful messages and context.

Development

Running Tests

hatch test

Building the Package

hatch build

Architecture

This plugin is built on the SAM Generic Gateway Framework and implements the GatewayAdapter interface. It handles:

• Inbound: Slack events → SAM tasks
• Outbound: SAM updates → Slack messages
• State Management: Thread tracking and user context
• Identity: User email mapping for authentication

Troubleshooting

Bot doesn't respond to messages

• Verify SLACK_BOT_TOKEN and SLACK_APP_TOKEN are set correctly
• Check that Socket Mode is enabled in your Slack App
• Ensure your bot has been invited to the channel
• Review logs for connection errors

User identity issues

• Verify the bot has users:read.email scope
• Check that users have email addresses associated with their Slack accounts
• Review slack_email_cache_ttl_seconds setting

Rate limiting

• The adapter includes built-in rate limit handling
• Consider adjusting message batch sizes if hitting limits frequently

License

See the LICENSE file in the root of the repository.