Initial commit: Complete macOS dotfiles system

🖖 Features:
- Master 'engage' script for one-command setup
- 120+ CLI tools via Homebrew
- 40+ Applications (casks + MAS apps)
- Complete macOS system configuration
- Security hardening and privacy settings
- Obsidian knowledge vault setup
- Comprehensive backup strategies
- Automated symlink management

Live long and prosper\! 🚀

🤖 Generated with Claude Code (https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

shell/history-sync.zsh

@@ -0,0 +1,49 @@
+#!/usr/bin/env zsh
+# Shell history synchronization for dotfiles
+# Add this to your .zshrc
+
+# History configuration
+export HISTFILE="$HOME/.zsh_history"
+export HISTSIZE=100000
+export SAVEHIST=100000
+
+# Better history behavior
+setopt EXTENDED_HISTORY          # Write timestamp to history
+setopt HIST_EXPIRE_DUPS_FIRST    # Expire duplicates first
+setopt HIST_IGNORE_DUPS          # Don't record duplicates
+setopt HIST_IGNORE_SPACE         # Don't record commands starting with space
+setopt HIST_VERIFY               # Show command before executing from history
+setopt INC_APPEND_HISTORY        # Add commands immediately
+setopt SHARE_HISTORY             # Share history between sessions
+
+# Create a backup of history on each new session
+if [[ -f "$HISTFILE" ]]; then
+    HIST_BACKUP_DIR="$HOME/.history_backups"
+    mkdir -p "$HIST_BACKUP_DIR"
+    
+    # Keep daily backups for the last 7 days
+    cp "$HISTFILE" "$HIST_BACKUP_DIR/zsh_history_$(date +%Y%m%d)"
+    
+    # Clean up old backups (keep last 7 days)
+    find "$HIST_BACKUP_DIR" -name "zsh_history_*" -mtime +7 -delete 2>/dev/null
+fi
+
+# Function to sync history to dotfiles (call manually)
+history_checkpoint() {
+    local dotfiles_history="$HOME/dotfiles/shell/zsh_history_checkpoint"
+    if [[ -f "$HISTFILE" ]]; then
+        # Keep last 10000 commands as checkpoint
+        tail -n 10000 "$HISTFILE" > "$dotfiles_history"
+        echo "History checkpoint saved to dotfiles"
+    fi
+}
+
+# Function to search all history including backups
+history_search_all() {
+    local pattern="$1"
+    echo "Searching current history..."
+    history | grep -i "$pattern"
+    
+    echo -e "\nSearching history backups..."
+    find "$HOME/.history_backups" -name "zsh_history_*" -exec grep -H -i "$pattern" {} \;
+}