diff --git a/README.md b/README.md
index 83e650d..43d5efe 100644
--- a/README.md
+++ b/README.md
@@ -2,69 +2,78 @@
 
 [![Test](https://github.com/corrupt952/tmuxist/actions/workflows/test.yaml/badge.svg)](https://github.com/corrupt952/tmuxist/actions/workflows/test.yaml)
 
-## TODO
-### main
-* log level
-### test
-* config
-* logger
+`tmuxist` is a tool to manage tmux sessions with configuration file.  
+You can define tmux session in `tmuxist.toml` and start or attach tmux session with `tmuxist` command.
 
 ## Installation
 
 ### Manual
+
 Download tar.gz on [Latest release](https://github.com/corrupt952/tmuxist/releases/latest).
 
 ### Homebrew
+
 ```sh
 brew tap corrupt952/tmuxist
 brew install tmuxist
 ```
 
 ## Commands
-### tmuxist init
-Initialize configuration.
 
-```sh
-tmuxist init
-# or, with profile name
-tmuxist init -profile your_profile
-```
+### tmuxist init
 
-### tmuxist edit
-Edit configuration.
+Initialize configuration.  
+When you run this command, `tmuxist.toml` is created in the current directory.
 
 ```sh
-tmuxist edit
-# or, with profile name
-tmuxist edit -profile your_profile
-# or, specify editor
-tmuxist edit -profile gvim
+tmuxist init
 ```
 
 ### tmuxist start
-Start tmux session.
+
+Start or attach tmux session.  
+When you run this command, the session defined in `tmuxist.toml` is created or attached.
 
 ```sh
 tmuxist start
-# or, with profile name
-tmuxist start -profile your_profile
 ```
 
-### tmuxist output
-Ouput tmuxist configuration.
+### tmuxist kill
+
+Kill tmux session.  
+When you run this command, the session defined in `tmuxist.toml` is deleted.
 
 ```sh
-tmuxist output
-# or, with profile name
-tmuxist output -profile your_profile
+tmuxist kill
 ```
 
+## Architecture
+
+`tmuxist` reads `tmuxist.toml` in the directory where the command is executed and manages tmux sessions.  
+
+### Configuration
+
+`tmuxist.toml` is a configuration file written in TOML format.
+
+In the example of `tmuxist.toml` below, the following tmux session is created.
 
-## Configuration
+- Session name ... `tmuxist`
+- Window 1
+    - Pane 1 ... `htop` command is executed in root(current directory)
+- Window 2
+    - Pane 1 ... `cd ~/Repo/corrupt952/tmuxist` command is executed and move to the directory
+    - Pane 2 ... Empty pane
+- Window 3
+    - Layout ... `tiled`
+    - Synchronize panes ... `true`
+    - Pane 1 ... Empty pane
+    - Pane 2 ... Empty pane
+    - Pane 3 ... Empty pane
+    - Pane 4 ... Empty pane
 
 ```toml
 name    = 'tmuxist'
-root    = '~'
+root    = '.'
 attach  = true
 
 [[windows]]