AgentKit v0.4.0 Release Notes¶

Release Date: February 2, 2026

Highlights¶

This release adds two major features: a Model Context Protocol (MCP) server for exposing agent tools to AI assistants like Claude Code, and a local development platform for CLI-based agent testing without cloud infrastructure.

New Features¶

MCP Server¶

The new mcp package provides a Model Context Protocol server implementation for exposing agent tools to AI assistants:

import "github.com/plexusone/agentkit/mcp"

// Create MCP server with tools
server := mcp.NewServer()
server.RegisterTool("search", searchHandler)
server.RegisterTool("calculate", calcHandler)

// Run with stdio transport
server.ServeStdio(ctx)

Features:

JSON-RPC 2.0 protocol with stdio transport
Tool listing via tools/list method
Tool execution via tools/call method
Session lifecycle management (initialize, initialized, ping)
Graceful shutdown handling
Extensible tool registration

Local Development Platform¶

The new platforms/local package enables running agents locally for development and testing:

import "github.com/plexusone/agentkit/platforms/local"

// Create local runner
runner := local.NewRunner(config)

// Run interactive CLI session
runner.Run(ctx)

Features:

Interactive chat with agents via CLI
Built-in file system tools (read, write, list)
Bash command execution
Conversation history management
No cloud infrastructure required

API Changes¶

Changed¶

LLM integration updated for new OmniLLM and OmniObserve APIs

Dependencies¶

Package	Previous	Current
`google.golang.org/adk`	0.3.0	0.4.0
`github.com/cloudwego/eino`	0.7.17	0.7.29
`google.golang.org/genai`	1.42.0	1.44.0
`github.com/a2aproject/a2a-go`	0.3.4	0.3.6
`github.com/plexusone/omnivault`	0.2.0	0.2.1
`github.com/plexusone/omniobserve`	0.5.0	0.5.1

Installation¶

go get github.com/plexusone/agentkit@v0.4.0

Full Changelog¶

See CHANGELOG.md for the complete list of changes.