QueryMT for VS Code

AI coding agent powered by QueryMT, integrated directly into VS Code's chat panel.

Features

Chat Participant (`@querymt`)

Type @querymt in the VS Code chat panel to interact with the QueryMT agent. It can:

Answer questions about your codebase
Write and edit code across files
Run shell commands
Analyze build errors and fix them
Use VS Code language intelligence (diagnostics, references, definitions, symbols)

Language Model Provider

QueryMT exposes its configured LLM providers (Anthropic, OpenAI, local llama.cpp, Ollama) in VS Code's model picker. Other extensions can use these models through the standard VS Code Language Model API.

Workspace Intelligence

The agent has access to VS Code's language server features:

Diagnostics -- see errors and warnings from all language servers
Go to Definition -- navigate to symbol definitions
Find References -- find all usages of a symbol
Document Symbols -- list all symbols in a file
Workspace Symbols -- search symbols across the project
Hover -- get type information and documentation
Type Definition -- navigate to type definitions

Requirements

VS Code 1.99.0 or later
The coder_agent binary installed and available on your PATH, or configured via settings

Setup

Install the extension
Ensure coder_agent is available:
- Place it on your system PATH, or
- Set querymt.binaryPath in VS Code settings
Open a workspace folder
The agent starts automatically (configurable via querymt.autoStart)
Type @querymt in the chat panel to begin

Extension Settings

Setting	Default	Description
`querymt.binaryPath`	`""`	Absolute path to `coder_agent`. If empty, searches bundled binary then PATH.
`querymt.defaultProvider`	`"anthropic"`	Default LLM provider (`anthropic`, `openai`, `llama_cpp`, `ollama`)
`querymt.defaultModel`	`"claude-sonnet-4-20250514"`	Default model identifier
`querymt.configFile`	`""`	Path to a QueryMT agent TOML config file
`querymt.autoStart`	`true`	Automatically start the agent when a workspace is opened
`querymt.maxRestarts`	`5`	Maximum automatic restart attempts after agent crashes

Commands

QueryMT: Restart Agent -- Restart the agent process
QueryMT: Show Agent Logs -- Open the output channel with agent logs
QueryMT: Manage Provider -- Configure provider settings
QueryMT: Agent Status -- Quick actions from the status bar

Status Bar

The status bar shows the current agent connection state:

$(check) QueryMT -- Connected and ready
$(sync~spin) QueryMT -- Connecting...
$(circle-slash) QueryMT -- Disconnected
$(error) QueryMT -- Error (click for recovery options)

Click the status bar item for quick access to restart, logs, and settings.

Architecture

The extension communicates with the coder_agent binary over stdio using the Agent Client Protocol (ACP). The agent runs as a child process and exchanges JSON-RPC messages for session management, prompt processing, and tool execution.

Development

# Install dependencies
npm install

# Build
npm run build

# Watch mode
npm run watch

# Type check
npm run lint

# Package VSIX
npm run package

QueryMT

querymt