Creates initial CLI docs

.gitignore

@@ -0,0 +1,2 @@
+.claude/
+.DS_Store

README.md

@@ -1,3 +1,114 @@
 # Hex CLI
 
-The official CLI for [Hex](https://hex.ai).
+![GitHub Release](https://img.shields.io/github/v/release/hex-inc/hex-cli)
+
+> [!IMPORTANT]
+> **Early Beta** — This project is in very early beta. Expect significant breaking changes as it matures.
+
+The official command-line interface for [Hex](https://hex.ai), designed for data people and their agents. Every command supports structured JSON output and consistent, composable patterns — making it a natural fit for AI agents, automation pipelines, and programmatic workflows, in addition to interactive use.
+
+## Installation
+
+### Shell installer (recommended)
+
+```sh
+curl -sSL https://raw.githubusercontent.com/hex-inc/hex-cli/main/install.sh | sh
+```
+
+To install to a custom location:
+
+```sh
+curl -sSL https://raw.githubusercontent.com/hex-inc/hex-cli/main/install.sh | sh -s -- --prefix ~/.local
+```
+
+### Homebrew
+
+Coming soon...
+
+## Getting started
+
+### Authenticate
+
+```sh
+hex auth login
+```
+
+This opens a browser-based OAuth flow and stores your credentials securely in your system keyring.
+
+### Run a project
+
+```sh
+hex run <project-id>
+```
+
+### List your projects
+
+```sh
+hex projects list
+```
+
+## Commands
+
+| Command           | Description                                                               |
+| ----------------- | ------------------------------------------------------------------------- |
+| `hex auth`        | Manage authentication (`login`, `logout`, `status`)                       |
+| `hex projects`    | Manage projects (`list`, `get`, `create`, `open`)                         |
+| `hex run`         | Execute a project and wait for completion                                 |
+| `hex runs`        | Manage project runs (`list`, `status`, `cancel`)                          |
+| `hex cells`       | Manage project cells (`list`, `get`, `create`, `update`, `delete`, `run`) |
+| `hex collections` | Browse collections (`list`, `get`)                                        |
+| `hex connections` | Browse data connections (`list`, `get`)                                   |
+| `hex groups`      | Manage workspace groups (`list`, `get`, `create`, `delete`)               |
+| `hex users`       | Browse workspace users (`list`, `get`)                                    |
+| `hex profile`     | Manage environment profiles (`list`, `add`, `use`, `remove`, `current`)   |
+| `hex config`      | Manage CLI configuration (`list`, `get`, `set`, `path`)                   |
+| `hex logs`        | View CLI logs                                                             |
+
+Run `hex --help` or `hex <command> --help` for detailed usage.
+
+## Global flags
+
+```
+--api-url <URL>     Override API base URL (env: HEX_API_URL)
+-p, --profile <NAME>  Select profile (env: HEX_PROFILE)
+--json              Output as JSON
+-q, --quiet         Suppress non-essential output
+-v, --verbose       Show verbose output
+--no-color          Disable colored output
+```
+
+## Configuration
+
+Configuration is stored in `~/.config/hex/config.toml`. You can set configuration options using the `hex config` command.
+
+### Credentials
+
+Credentials are stored in your system keyring (Apple Keychain on macOS, Secret Service on Linux). If a keyring is unavailable, they fall back to `~/.config/hex/credentials.json`.
+
+## JSON output
+
+All commands support `--json` for machine-readable output, making it easy to integrate with scripts and CI pipelines:
+
+```sh
+hex projects list --json | jq '.[0].name'
+```
+
+You can also set JSON as the default output format for a profile:
+
+```sh
+hex config set output_format json
+```
+
+## Uninstall
+
+Remove the binary from wherever it was installed:
+
+```sh
+rm "$(which hex)"
+```
+
+To also remove configuration and credentials:
+
+```sh
+rm -rf ~/.config/hex
+```