# Diana

> The terminal for you and every coding agent you run. Diana records every session on
> your machine, shows what each agent changed, and asks before an agent runs anything
> risky. For macOS, Windows and Linux.

Diana is a desktop app (macOS, Windows, Linux) over a command-line tool. It reads the sessions your
agents already record (Claude Code, Codex, Gemini CLI, opencode), supervises the ones
you start from it, and keeps one local, append-only log of what happened.

## What it does

- **Review** — pull requests you owe a review, and yours waiting on one, in full.
- **Toolbox** — the agents, MCP servers, plugins and skills your agents can reach.
- **Waiting** — the one place that asks you anything: a command an agent wants to run,
  a pull request review you owe, a CI check that failed.
- **Tasks** — every running agent at once, beside the plan; step into any of them. Pick a
  task to see what done means, every run on it, the evidence and the cost. The timeline,
  the month and the cost are its tabs.
- **Changes** — the file an agent wrote, beside the terminal that wrote it, with changed
  lines marked. PDFs, videos and web pages it made open there too, and a running dev
  server can be previewed in the same pane.
- **New task** — say what you want and what done means; a run started on it is gathered
  by it. Or start from a GitHub issue, a race of one task across several agents, or a
  night shift that works through your todo list. Each shows what it is likely to cost,
  from your own history, before anything spends.
- **For your agents** — Diana is an MCP server. Agents can ask what was tried in this
  repository before, which rules are in force, whether an action is allowed, and hand
  work off to a new session.

## What it doesn't do

- Send your code or your log anywhere. Everything is in `~/.diana/diana.db`. GitHub
  features run your own `gh`; change descriptions and dictation use local models only.
- Merge anything.
- Message anyone on its own. A suggested nudge is sent by your agent, after you approve it.
- Spend without asking.

## Guides

- [How to run several Claude Code sessions at once](https://heydiana.ai/guides/run-several-claude-code-sessions)
- [How to see what Claude Code changed](https://heydiana.ai/guides/see-what-claude-code-changed)
- [How to approve Claude Code and Codex commands before they run](https://heydiana.ai/guides/approve-agent-commands)
- [Diana or tmux: running coding agents](https://heydiana.ai/guides/diana-vs-tmux)

## Get it

Free.

- macOS (Apple silicon and Intel): https://heydiana.ai/download/mac
- Windows 10 and 11: https://heydiana.ai/download/windows
- Linux (AppImage): https://heydiana.ai/download/linux

Diana checks for a newer version at launch and once a day, and installs it only when you
click Update. That check is the one request it makes on its own: GitHub sees it, nothing
from your log is sent, and it is recorded in your log. It can be turned off.