GoDoctor

GoDoctor is an intelligent, AI-powered Model Context Protocol (MCP) server designed to assist Go developers. It provides a comprehensive suite of tools for navigating, editing, analyzing, and modernizing Go codebases.

Features

GoDoctor organizes its capabilities into domain-specific tools to streamline development workflows.

🔍 Navigation & Discovery

• list_files: Explore the project hierarchy recursively to understand the architecture.
• smart_read: The Universal Reader. Inspects file content, structure (outline), or specific snippets. Includes documentation for imported packages.

✏️ Smart Editing

• file_create: Initialize a new source file with proper boilerplate and import organization.
• smart_edit: Perform targeted code modifications using Levenshtein distance matching. Automatically handles formatting and checks syntax before finalizing.

🛠️ Go Toolchain Integration

• smart_build: The Universal Quality Gate. Compiles the project, runs tests, and checks for linting issues in a single atomic step. Automatically runs go mod tidy and gofmt.
• add_dependency: Manage module dependencies and immediately fetch documentation for the new package.
• read_docs: Query documentation for any package or symbol in the Go ecosystem.
• modernize_code: Automatically upgrade legacy Go patterns to modern standards.

🤖 Expert Assistance

• code_review: Submit code for expert AI analysis focusing on correctness and idiomatic style.

Installation

For Claude Code Users

1. Install the binary:

   go install github.com/danicat/godoctor/cmd/godoctor@latest
   

2. Add GoDoctor as an MCP server:

   claude mcp add --transport stdio --scope user godoctor -- godoctor
   

3. (Optional) Add agent instructions to your project:

   godoctor --agents >> CLAUDE.md
   

   This appends tool usage guidance to your CLAUDE.md so Claude knows how to use each tool effectively.

For Gemini CLI Users

If you use the Gemini CLI, you can install GoDoctor as an extension:

gemini extensions install https://github.com/danicat/godoctor

From Source

1. Clone the repository:

   git clone https://github.com/danicat/godoctor.git
   cd godoctor
   

2. Build and install:

   make install
   

Configuration

1. Authentication (Optional)

Most GoDoctor tools work without any authentication. The code_review tool requires access to Google's Generative AI models for cross-model code review. If no credentials are found, code_review is automatically disabled and all other tools continue to work normally.

Option 1: Gemini API (Personal) Set the GEMINI_API_KEY (or GOOGLE_API_KEY) environment variable.

export GEMINI_API_KEY="your-api-key"

Option 2: Vertex AI (Enterprise) Set the following environment variables:

export GOOGLE_GENAI_USE_VERTEXAI=true
export GOOGLE_CLOUD_PROJECT="your-project-id"
export GOOGLE_CLOUD_LOCATION="us-central1"

2. Command-Line Flags

Flag	Description	Default
--model	Default Gemini model to use for AI tasks.	gemini-2.5-pro
--allow	Comma-separated list of tools to explicitly enable (whitelist mode).	""
--disable	Comma-separated list of tools to explicitly disable.	""
--listen	Address to listen on for HTTP transport (e.g., :8080).	"" (Stdio)
--list-tools	List all available tools and their descriptions, then exit.	false
--agents	Print LLM agent instructions and exit.	false
--version	Print version and exit.	false

Agent Integration

To get the optimal system prompt for your AI agent:

godoctor --agents

To see which tools are currently active:

godoctor --list-tools

License

Apache 2.0