mcp_channel 0.2.1

Unified channel abstraction layer for messaging platforms (Slack, Telegram, Discord, etc.). Provides platform-agnostic messaging with idempotency, session management, and policy enforcement.

Changelog

All notable changes to this project are documented in this file.

The format is based on Keep a Changelog and the project adheres to Semantic Versioning.

0.2.1 - 2026-05-23 - mcp_bundle 0.4.0 cascade

Changed (cascade)

• mcp_bundle caret bumped from ^0.3.0 to ^0.4.0. mcp_channel does not touch UiSection.pages directly, so this release is a caret-only cascade. Consumers should bump to ^0.2.1.

0.2.0 - 2026-04-28 - Multi-Platform Connectors

Added

• Connectors — Discord, Email, Kakao (in addition to existing Slack).
• Extended channel types — rich ContentBlock system, action elements, attachments, extended capabilities and events.
• Principal entity for typed session identity.
• AES message handling (e.g. WeCom encryption) and signature verification helpers.

Changed

• Slack connector and base connector hardened for production usage (Socket Mode + Events API).
• Session subsystem (Session / SessionManager / SessionStore / SessionMessage) refactored around Principal.
• Channel policy / rate limit / circuit breaker tightened.
• MCP integration (ChannelHandler, MessageProcessor) refactored.
• New dependency: mcp_bundle ^0.3.0.

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0.1.0 - 2024-02-16

Added

• Initial release
• Core types: ChannelEvent, ChannelResponse, ChannelIdentity, ConversationKey
• ChannelPort interface for platform adapters
• Session management with Session, SessionManager, SessionStore
• Idempotency handling with IdempotencyGuard
• Policy enforcement: rate limiting, retry with backoff, circuit breaker
• MCP integration: ChannelRuntime, McpInvoker, LlmBridge
• Slack connector (skeleton implementation)
• Basic test coverage