FAQ

General

What is Agent Nine?

An AI coding assistant that can read, write, and edit your code, run commands, browse the web, and integrate with your development tools. It works as a desktop app or in the browser.

Is my code safe?

In Code mode, Agent Nine reads files locally through the desktop app and sends relevant context to the AI API for processing. Your files are not stored on Agent Nine servers. In Chat mode, conversation text is sent to the AI API. Destructive commands are blocked automatically, and credentials are detected before sending. See Security for details.

Which AI models are available?

Model	Best for
Sonnet 4.6	Fast, smart — recommended default
Opus 4.6	Most capable — complex tasks
Haiku 4.5	Fastest — quick questions

What programming languages does Agent Nine support?

Agent Nine works with any programming language. It can also respond in English and Russian.

Is there a free trial?

Contact us at enterprise@agentnine.ru for team trials. Individual plans are available at agentnine.ru.

Does my data train AI models?

No. Anthropic's API has a zero-retention policy — your inputs and outputs are not stored or used for training.

Code Mode

Why is Code mode greyed out?

Code mode requires the desktop app to be installed and connected. Make sure the desktop app is running (check the system tray).

Can Agent Nine delete my files?

Destructive commands like rm -rf or git reset --hard are blocked automatically. Agent Nine will ask for permission before any risky operation.

Can I undo changes?

Yes. Type /undo to revert all file changes made in the current session.

How does Agent Nine handle large projects?

Agent Nine uses file search (glob, grep) to find relevant code instead of reading everything. It works efficiently with projects of any size.

What permission modes are available?

Mode	Behavior
Default	Asks before every command
Session-approved	Approve once, then similar commands auto-run
Auto	Everything auto-runs except destructive commands

See Code Execution for details.

Chat Mode

Do I need the desktop app for Chat mode?

No. Chat mode works in the web browser at agentnine.ru without any installation.

Can Chat mode access my files?

Not directly. Chat mode runs in the cloud with a sandboxed environment. It can execute code, browse the web, and use integrations (GitHub, Slack, etc.).

What runtimes are available in the sandbox?

Python, Node.js, Go, Rust, and Java are pre-installed in the cloud sandbox.

Features

How do I use voice input?

Click the microphone icon in the input area, speak naturally, then click again to stop. The transcription appears in real-time. See Voice Input.

What is Plan mode?

Type /plan to enter plan mode. Agent Nine analyzes the task and creates a structured plan before writing code. Approve the plan, then say "go ahead" to implement. See Plan Mode.

How do agents work?

For complex tasks, Agent Nine can create background agents that work in parallel. Each agent runs independently and reports results. See Agents.

What are effort levels?

Agent Nine automatically adjusts how deeply it thinks based on your message — from instant responses for simple questions to deep analysis for complex problems. See Effort Levels.

How does memory work?

Agent Nine compacts long conversations automatically to free up context space. Use /compact manually if needed. Persistent instructions go in agentnine.md. See Memory.

Can I customize Agent Nine's behavior per project?

Yes. Create agentnine.md in your project root with instructions, rules, and conventions. Agent Nine reads it at the start of every session. See Project Config.

Integrations

How many integrations are available?

11 built-in integrations: GitHub, Google Drive, Gmail, Google Calendar, Slack, Notion, Linear, Figma, Vercel, Sentry, Jira. Plus support for custom MCP servers.

How do I connect an integration?

Settings → Integrations → click Connect next to the service → authorize in the popup.

Are my integration tokens safe?

Yes. OAuth tokens are encrypted and stored securely. You can disconnect any integration at any time to revoke access.

Can I use integrations in both modes?

Yes. Integrations work in both Chat and Code modes.

Can I connect custom tools?

Yes. Agent Nine supports the MCP protocol — connect any MCP-compatible server for databases, APIs, or custom tools. See Custom MCP.

Troubleshooting

Agent Nine is not responding

1. Check your internet connection
2. Try refreshing the page (web) or restarting the app (desktop)
3. Use /compact if the context is full

My machine shows "offline"

1. Make sure the desktop app is running
2. Check the system tray for the Agent Nine icon
3. Try restarting the desktop app

Chat history is missing

Sessions are stored on the server. If you're signed in with the same account, your history should appear in the sidebar. Try refreshing.

Need more help?

See the full Troubleshooting guide or contact support@agentnine.ru.