Replace screen with tmux and simplify zsh configuration

.gitignore

@@ -0,0 +1,21 @@
+# Private environment files
+.zshenv.private
+zshenv.private
+*.private
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Editor files
+*.swp
+*.swo
+*~
+.idea/
+.vscode/
+
+# Backup files
+*.old
+*.old.*
+*.bak
+*.backup

CLAUDE.md

@@ -4,15 +4,15 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 ## Repository Purpose
 
-This is a personal development environment setup tool that automates the installation and configuration of common development tools (zsh, nvim, screen, go) on Linux/Mac systems. It creates a consistent development environment with a focus on Go development.
+This is a personal development environment setup tool that automates the installation and configuration of common development tools (zsh, nvim, tmux, go) on Linux/Mac systems. It creates a consistent development environment with a focus on Go development.
 
 ## Key Commands
 
 ### Setup Commands
-- `make` or `make all` - Install all tools (zsh, nvim, screen, go)
-- `make zsh` - Install zsh with oh-my-zsh and powerlevel10k
+- `make` or `make all` - Install all tools (zsh, nvim, tmux, go)
+- `make zsh` - Install minimal zsh configuration with Pure prompt (no frameworks)
 - `make nvim` - Configure neovim for Go development
-- `make screen` - Setup GNU screen
+- `make tmux` - Setup tmux with minimal configuration
 - `make go` - Create Go directory structure
 - `make help` - Show available targets
 
@@ -41,8 +41,9 @@ This is a personal development environment setup tool that automates the install
    - All scripts use `set -e` for error handling
 
 3. **Configuration storage**:
-   - Tool configs are stored in subdirectories (zsh/, nvim/, screen/)
+   - Tool configs are stored in subdirectories (zsh/, nvim/, tmux/)
    - Central configuration in `config` file controls backup behavior and paths
+   - Private environment template: `zsh/zshenv.private.template`
 
 ### Important Configuration
 - `DT_BACKUP` - Whether to backup existing files (default: true)
@@ -62,6 +63,7 @@ To add support for other distros, modify the case statement in the `base` file a
 ## Development Notes
 
 - Never requires sudo - users must install system packages first
-- kubectl is conditionally loaded in zshrc to prevent errors if not installed
+- The zsh setup creates ~/.zshenv.private from template for API keys and tokens
 - The nvim Go setup requires golangci-lint to be installed separately
-- gopls is automatically installed by vim-go on first use
+- gopls is automatically installed by vim-go on first use
+- Backup files are created with .old suffix (or .old.N for multiple backups)

Makefile

@@ -1,17 +1,17 @@
 .PHONY: all
-all: zsh nvim screen go
+all: zsh nvim tmux go
 
 .PHONY: zsh
-zsh: ## Installs oh-my-zsh with powerline10k theme and config files.
+zsh: ## Installs minimal zsh configuration (pure shell, no frameworks).
 	@./zsh.sh
 
 .PHONY: nvim
 nvim: ## Sets up nvim with plugins and config files.
 	@./nvim.sh
 
-.PHONY: screen
-screen: ## Sets up screen.
-	@./screen.sh
+.PHONY: tmux
+tmux: ## Sets up tmux with minimal configuration.
+	@./tmux.sh
 
 .PHONY: go
 go: ## Sets up go directories.

README.md

@@ -12,18 +12,44 @@ I've used devtools on Ubuntu, ArchLinux, and Mac OS X. It may work for other Lin
 
 Currently the following tools are setup:
 
-* `zsh` with `oh-my-zsh` and the `powerline10k` theme.
+* `zsh` with minimal configuration (no frameworks) including Pure prompt, syntax highlighting, and autosuggestions.
 * `nvim` with `gruvbox` theme and modern Go development support using `vim-go`, `gopls`, and `golangci-lint`.
-* `screen` with some basic changes to its look.
+* `tmux` with minimal configuration, mouse support, and intuitive key bindings.
 * `go` with configurable directory structure.
 
 I will probably add more in the future, like Docker.
 
+### Minimal Zsh Features
+
+The minimal zsh configuration includes:
+- Command history with deduplication and sharing between sessions
+- Tab completion with case-insensitive menu selection
+- Enhanced ls commands using `eza` with icons and colors
+- Git aliases (gs, ga, gc, gp, gl, gd)
+- [Pure](https://github.com/sindresorhus/pure) prompt (installed automatically)
+- [zsh-autosuggestions](https://github.com/zsh-users/zsh-autosuggestions) for fish-like suggestions
+- [zsh-syntax-highlighting](https://github.com/zsh-users/zsh-syntax-highlighting) for command highlighting
+- [fzf](https://github.com/junegunn/fzf) integration for fuzzy finding (Ctrl+R for history, Ctrl+T for files, Alt+C for directories)
+- Private environment variables support via `~/.zshenv.private` (template provided)
+
+### Minimal Tmux Features
+
+The minimal tmux configuration includes:
+- Mouse support enabled for clicking and scrolling
+- Automatic window renumbering when one is closed
+- Increased scrollback history (10000 lines)
+- No delay when pressing Escape key
+- 256 color support
+- Vi keybindings in copy mode
+- Clean status bar with date/time display
+- Visual pane borders with active pane highlighting
+
 ## Install
 
 First, make sure to install the following packages using your OS's package manager:
 
-* `screen`
+**Required:**
+* `tmux`
 * `unzip`
 * `nvim`
 * `zsh`
@@ -32,6 +58,12 @@ First, make sure to install the following packages using your OS's package manag
 * `make`
 * `wget`
 
+**Optional but recommended for enhanced features:**
+* `eza` - modern replacement for ls with icons and colors
+* `fzf` - fuzzy finder for history, files, and directories
+* `fd` - faster alternative to find (used by fzf)
+* `bat` - cat with syntax highlighting (used by fzf for file preview)
+
 ### Optional: Go Development
 
 If you want to use the Go development features, you'll need to install Go and related tools.
@@ -46,7 +78,10 @@ Install prereqs first, devtools will not install them for you:
 
 ```
 sudo apt-get update && sudo apt-get upgrade
-sudo apt-get install neovim zsh git make wget unzip screen
+sudo apt-get install neovim zsh git make wget unzip tmux
+
+# Optional but recommended
+sudo apt-get install eza fzf fd-find bat
 ```
 
 #### Optional: Kubernetes Development
@@ -93,7 +128,13 @@ Install the prereqs first, devtools will not install them for you:
 
 ```
 brew update && brew upgrade
-brew install nvim git make wget screen
+brew install nvim git make wget tmux
+
+# Optional but recommended
+brew install eza fzf fd bat
+
+# After installing fzf, run its install script for key bindings
+$(brew --prefix)/opt/fzf/install
 ```
 
 #### Optional: Kubernetes Development
@@ -162,22 +203,20 @@ Targets:
     go                             Sets up go directories.
     help                           Shows help.
     nvim                           Sets up nvim with plugins and config files.
-    screen                         Sets up screen.
-    zsh                            Installs oh-my-zsh with powerline10k theme and config files.
+    tmux                           Sets up tmux with minimal configuration.
+    zsh                            Installs minimal zsh configuration (pure shell, no frameworks).
 ```
 
-For example, to just setup screen, run:
+For example, to just setup tmux, run:
 
 ```
-make screen
+make tmux
 ```
 
 ## Other
 
 I like to set my terminal theme to the gruvbox theme, the same theme I'm using for `nvim`. For iterm2, download the theme at https://github.com/herrbischoff/iterm2-gruvbox and import it.
 
-You'll also need powerline fonts for your terminal, otherwise some weird symbols will show up. My preference is Mononoki Nerd Font from https://www.nerdfonts.com/.
-
 Also, I install `screenfetch` when zsh starts up. On Ubuntu, install it as follows:
 
 1. Run `sudo apt-get install screenfetch`.

base

@@ -19,7 +19,18 @@ function echook {
 function backup {
 	if [ "$DT_BACKUP" == "true" ]; then
 		if [ -f "$1" ]; then
-			mv "$1" "$1.old"
+			# Find the next available backup number
+			if [ ! -f "$1.old" ]; then
+				echoinfo "Backing up $1 to $1.old"
+				mv "$1" "$1.old"
+			else
+				num=1
+				while [ -f "$1.old.$num" ]; do
+					num=$((num + 1))
+				done
+				echoinfo "Backing up $1 to $1.old.$num"
+				mv "$1" "$1.old.$num"
+			fi
 		fi
 	fi
 }

go.sh

@@ -13,16 +13,18 @@ mkdir -p "$DT_GOPATH"
 mkdir -p "$DT_GOPATH/src"
 mkdir "$DT_GOPATH/bin"
 
-# Add env vars to zshrc
-echo "# Go environment variables" >> "$HOME/.zshrc"
-echo "export PATH=\"$DT_GOPATH/bin:\$PATH\"" >> "$HOME/.zshrc"
-echo "export GOPATH=\"$DT_GOPATH\"" >> "$HOME/.zshrc"
-
-if [ ! -z "$DT_GOPRIVATE" ]; then
-	echo "export GOPRIVATE=\"$DT_GOPRIVATE\"" >> "$HOME/.zshrc"
-fi
-
-echo >> "$HOME/.zshrc"
+# Create modular Go configuration file
+GO_ENV_FILE="$HOME/.zsh.go.env"
+echoinfo "Creating Go environment file at $GO_ENV_FILE..."
+{
+	echo "# Go environment variables (managed by devtools)"
+	echo "export PATH=\"$DT_GOPATH/bin:\$PATH\""
+	echo "export GOPATH=\"$DT_GOPATH\""
+	if [ ! -z "$DT_GOPRIVATE" ]; then
+		echo "export GOPRIVATE=\"$DT_GOPRIVATE\""
+	fi
+} > "$GO_ENV_FILE"
+echosuccess "Go configuration written to $GO_ENV_FILE"
 
 echook
 

tmux.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+# Exit if any command fails
+set -e
+
+. base
+
+echosuccess "Setting up tmux..."
+
+# Back up existing .tmux.conf
+backup "$HOME/.tmux.conf"
+
+# Copy new .tmux.conf
+cp tmux/tmux.conf "$HOME/.tmux.conf"
+
+echook
+echo

tmux/tmux.conf

@@ -0,0 +1,46 @@
+# ------------------------------------------------------------------------------
+# ESSENTIAL SETTINGS
+# ------------------------------------------------------------------------------
+
+# Enable mouse support for clicking and scrolling
+set -g mouse on
+
+# Renumber windows automatically when one is closed
+set -g renumber-windows on
+
+# Increase the amount of scrollback history
+set -g history-limit 10000
+
+# Remove the delay when pressing the escape key
+set -sg escape-time 0
+
+# Set the default terminal to support 256 colors
+set -g default-terminal "screen-256color"
+
+# Set keybindings in copy mode to be like the Vi editor
+setw -g mode-keys vi
+
+# ------------------------------------------------------------------------------
+# VISUAL SETTINGS
+# ------------------------------------------------------------------------------
+
+# Status bar
+set -g status-position bottom
+set -g status-style 'bg=colour234 fg=colour137'
+set -g status-left ''
+set -g status-right '#[fg=colour233,bg=colour241,bold] %d/%m #[fg=colour233,bg=colour245,bold] %H:%M:%S '
+set -g status-right-length 50
+set -g status-left-length 20
+
+# Window status
+setw -g window-status-current-style 'fg=colour81 bg=colour238 bold'
+setw -g window-status-current-format ' #I:#W#F '
+setw -g window-status-style 'fg=colour138 bg=colour235'
+setw -g window-status-format ' #I:#W#F '
+
+# Pane borders
+set -g pane-border-style 'fg=colour238'
+set -g pane-active-border-style 'fg=colour51'
+
+# Messages (e.g., when reloading config)
+set -g message-style 'fg=colour232 bg=colour166 bold'