AI coding agent for VS Code
Chat · Agent mode · Inline completions · MCP · Semantic search

✨ Features

💬 Chat

Stream responses from any OnlySq-hosted model — GPT, Claude, Gemini, Grok, DeepSeek, Qwen and more
Three modes: Agent ⚡ (autonomous tool use), Chat 💬 (conversation), Plan 📋 (read-only analysis)
Model badge on every response — always see which model answered
@-mentions — type @filename to attach workspace files as context
Drag & drop files and images directly into the composer
Multi-chat with search, rename, and persistent history
Export any conversation as Markdown or JSON
Slash commands — /model, /memory, /export, /clear, /help

🤖 Agent

Autonomous coding agent with 37 built-in tools and up to 500 steps per run.

Category	Tools
File ops	`read_file`, `propose_edit`, `replace_in_file`, `apply_at_line`, `patch_file`, `delete_file`, `rename_file`
Search	`search` (regex), `semantic_search` (embeddings), `find_files` (glob), `find_in_file`
Shell	`run_command`, `run_command_interactive`, `terminal` (persistent sessions)
Git	`git_status`, `git_diff`, `git_commit`
Web	`fetch_url`, `web_search`, `scrape_page`, `open_in_browser`
Editor	`open_file`, `goto_position`, `get_cursor`, `get_selection`, `get_diagnostics`
VS Code	`run_vscode_command`, `run_task`, `list_tasks`
Memory	`add_memory`, `get_memory`, `view_memories`, `delete_memory`
Tasks	`create_task`, `update_task`, `delete_task`, `list_agent_tasks`
Context	`read_project_context`, `update_project_context`, `workspace_info`, `system_info`
Control	`pause_agent`, `ask_user`, `delegate` (to sub-agents)

Live diff preview — every file edit opens a native VS Code diff with Apply / Reject buttons. Batch operations with Apply All / Reject All and Undo.

Cancel button — kill hanging run_command or terminal operations mid-execution.

🧠 Sub-Agents

The agent can delegate tasks to 8 specialized sub-agents that run in isolated contexts:

Sub-agent	Purpose
`code_reviewer`	Find bugs and security issues (read-only)
`code_writer`	Implement code changes
`test_runner`	Run and fix tests
`explorer`	Explore and explain codebase structure (read-only)
`shell_operator`	DevOps and system tasks
`refactorer`	Restructure code preserving behavior
`doc_writer`	Write documentation
`planner`	Break complex goals into steps (read-only)

🔌 MCP (Model Context Protocol)

Connect external tool servers via the MCP standard. Any MCP server works — GitHub, Postgres, Slack, filesystem, and hundreds more.

// .onlysq/mcp.json
{
  "servers": {
    "github": {
      "command": "npx",
      "args": ["-y", "@modelcontextprotocol/server-github"],
      "env": { "GITHUB_PERSONAL_ACCESS_TOKEN": "ghp_..." }
    }
  }
}

UI panel in chat header — add, remove, enable/disable, restart servers
Hot reload — edit mcp.json and servers restart automatically
Commands: OnlySq: MCP — Edit Config, MCP — Reload Servers, MCP — Status

🔍 Semantic Search

Natural-language search across your entire workspace using embedding vectors.

OnlySq: Reindex Workspace — scans files, chunks text, generates embeddings
Agent uses semantic_search tool — finds code by meaning, not exact keywords
Incremental updates — unchanged files are skipped on re-index

Configurable embedding model: gemini-embedding-001 (default), gemini-embedding-2, pplx-embed-*.

⌨️ Inline Completions

AI-powered autocomplete in any language. Triggered as you type or on demand.

🖥️ Live Terminal Sessions

Persistent shell sessions shared between you and the agent:

Agent opens a terminal → you see it in VS Code
You type in the terminal → agent sees your input on its next step
Full open / write / read / peek / close / list lifecycle

💾 Persistent Memory & Tasks

Memory — key-value store that survives across sessions. Agent remembers your preferences, SSH keys, project decisions.
Tasks — trackable work items with status (todo → in progress → done). Displayed as compact markers in chat, managed via dedicated panel.
Project context — .onlysq/context.md auto-injected into every agent run.

🚀 Quick Start

Install the extension
Click the OnlySq icon in the Activity Bar
Click Auth with OnlySq → sign in via browser
Start chatting — toggle Agent mode with the ⚡ button

⚙️ Configuration

Setting	Default	Description
`onlysq.chatModel`	`gpt-4o-mini`	Model for chat and agent
`onlysq.completionModel`	`gpt-4o-mini`	Model for inline completions
`onlysq.embeddingModel`	`gemini-embedding-001`	Model for semantic search index
`onlysq.temperature`	`0.3`	LLM temperature (0–2)
`onlysq.agent.maxSteps`	`50`	Max agent loop iterations (1–300)
`onlysq.agent.parallelTools`	`true`	Run independent tools in parallel
`onlysq.agent.toolCache`	`true`	Cache read-only tool results within a run
`onlysq.agent.toolPolicy`	`{}`	Per-tool approval: `always` / `ask` / `never` / `disabled`
`onlysq.agent.customSystemPrompt`	`""`	Custom instructions appended to system prompt
`onlysq.agent.personalization`	`false`	Let agent learn your style from conversations
`onlysq.chat.persistHistory`	`true`	Persist chat history between sessions
`onlysq.inlineCompletions.enabled`	`true`	Enable inline completions

Full list: Ctrl+, → search "OnlySq".

🎹 Keyboard Shortcuts

Shortcut	Action
`Ctrl+Alt+O`	Open chat
`Ctrl+Alt+N`	New chat
Right-click → Explain Selection	Explain selected code
Right-click → Refactor Selection	Refactor selected code

📋 Commands

Open the Command Palette (Ctrl+Shift+P) and type OnlySq:

Command	Description
Open Chat	Focus the chat panel
New Chat	Start a fresh conversation
Run Agent…	Prompt the agent with a goal
Select Chat Model	Pick from available models
Select Completion Model	Pick completion model
Open Settings	Open in-chat settings panel
Initialize Project Context	Auto-generate `.onlysq/context.md`
Reindex Workspace	Build semantic search index
Drop Semantic Index	Delete the index
MCP — Edit Config	Open `.onlysq/mcp.json`
MCP — Reload Servers	Restart all MCP servers
MCP — Status	Show server status in log
Show Log	Open extension output channel
Reset Token Usage	Reset session token counter

🗂️ Project Files

File	Purpose
`.onlysq/context.md`	Persistent project context, auto-injected into every agent run
`.onlysq/mcp.json`	MCP server configuration
`.onlysq/index.json`	Semantic search index (auto-generated)
`.onlysq` / `.onlysq-rules` / `.onlysq.md`	Project rules, auto-read as custom instructions

Requirements

VS Code 1.85+
OnlySq account — my.onlysq.ru

License

MIT

OnlySq CLI