Reconstruct the structure of go

CONTRIBUTING.md

@@ -50,11 +50,27 @@ Config: `.editorconfig` and `.shellcheckrc`
 
 ## Go Components
 
-`mo status` and `mo analyze` use Go for the interactive dashboards.
+`mo status` and `mo analyze` use Go with Bubble Tea for interactive dashboards.
+
+**Code organization:**
+
+- Each module split into focused files by responsibility
+- `cmd/analyze/` - Disk analyzer with 7 files under 500 lines each
+- `cmd/status/` - System monitor with metrics split into 11 domain files
+
+**Development workflow:**
 
 - Format code with `gofmt -w ./cmd/...`
-- Run `go test ./cmd/...` before submitting Go changes (ensures packages compile)
-- Build universal binaries locally via `./scripts/build-status.sh` and `./scripts/build-analyze.sh`
+- Run `go vet ./cmd/...` to check for issues
+- Build with `go build ./...` to verify all packages compile
+- Build universal binaries via `./scripts/build-status.sh` and `./scripts/build-analyze.sh`
+
+**Guidelines:**
+
+- Keep files focused on single responsibility
+- Extract constants instead of magic numbers
+- Use context for timeout control on external commands
+- Add comments explaining why, not what
 
 ## Pull Requests
 

cmd/analyze/cache.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"context"
 	"encoding/gob"
 	"encoding/json"
 	"fmt"
@@ -291,7 +292,7 @@ func removeOverviewSnapshot(path string) {
 
 // prefetchOverviewCache scans overview directories in background
 // to populate cache for faster overview mode access
-func prefetchOverviewCache() {
+func prefetchOverviewCache(ctx context.Context) {
 	entries := createOverviewEntries()
 
 	// Check which entries need refresh
@@ -309,8 +310,15 @@ func prefetchOverviewCache() {
 		return
 	}
 
-	// Scan and cache in background
+	// Scan and cache in background with context cancellation support
 	for _, path := range needScan {
+		// Check if context is cancelled
+		select {
+		case <-ctx.Done():
+			return
+		default:
+		}
+
 		size, err := measureOverviewSize(path)
 		if err == nil && size > 0 {
 			_ = storeOverviewSize(path, size)

cmd/analyze/cleanable.go

@@ -59,17 +59,17 @@ var projectDependencyDirs = map[string]bool{
 	".pnpm-store":      true, // pnpm store
 
 	// Python dependencies and outputs
-	"venv":                 true,
-	".venv":                true,
-	"virtualenv":           true,
-	"__pycache__":          true,
-	".pytest_cache":        true,
-	".mypy_cache":          true,
-	".ruff_cache":          true,
-	".tox":                 true,
-	".eggs":                true,
-	"htmlcov":              true, // Coverage reports
-	".ipynb_checkpoints":   true, // Jupyter checkpoints
+	"venv":               true,
+	".venv":              true,
+	"virtualenv":         true,
+	"__pycache__":        true,
+	".pytest_cache":      true,
+	".mypy_cache":        true,
+	".ruff_cache":        true,
+	".tox":               true,
+	".eggs":              true,
+	"htmlcov":            true, // Coverage reports
+	".ipynb_checkpoints": true, // Jupyter checkpoints
 
 	// Ruby dependencies
 	"vendor":  true,
@@ -95,10 +95,10 @@ var projectDependencyDirs = map[string]bool{
 	".nyc_output":   true, // NYC coverage
 
 	// Frontend framework outputs
-	".angular":     true, // Angular CLI cache
-	".svelte-kit":  true, // SvelteKit build
-	".astro":       true, // Astro cache
-	".docusaurus":  true, // Docusaurus build
+	".angular":    true, // Angular CLI cache
+	".svelte-kit": true, // SvelteKit build
+	".astro":      true, // Astro cache
+	".docusaurus": true, // Docusaurus build
 
 	// iOS/macOS development
 	"DerivedData": true,

cmd/analyze/constants.go

@@ -6,8 +6,8 @@ const (
 	maxEntries            = 30
 	maxLargeFiles         = 30
 	barWidth              = 24
-	minLargeFileSize      = 100 << 20 // 100 MB
-	defaultViewport       = 12        // Default viewport when terminal height is unknown
+	minLargeFileSize      = 100 << 20          // 100 MB
+	defaultViewport       = 12                 // Default viewport when terminal height is unknown
 	overviewCacheTTL      = 7 * 24 * time.Hour // 7 days
 	overviewCacheFile     = "overview_sizes.json"
 	duTimeout             = 60 * time.Second // Increased for large directories

cmd/analyze/delete.go

@@ -56,14 +56,19 @@ func deletePathWithProgress(root string, counter *int64) (int64, error) {
 		return nil
 	})
 
-	if err != nil {
-		return count, err
+	// Track walk error separately
+	if err != nil && firstErr == nil {
+		firstErr = err
 	}
 
-	if err := os.RemoveAll(root); err != nil {
-		return count, err
+	// Try to remove remaining directory structure
+	// Even if this fails, we still report files deleted
+	if removeErr := os.RemoveAll(root); removeErr != nil {
+		if firstErr == nil {
+			firstErr = removeErr
+		}
 	}
 
-	// Return the first error encountered during deletion if any
+	// Always return count (even if there were errors), along with first error
 	return count, firstErr
 }

cmd/analyze/main.go

@@ -141,7 +141,10 @@ func main() {
 	}
 
 	// Prefetch overview cache in background (non-blocking)
-	go prefetchOverviewCache()
+	// Use context with timeout to prevent hanging
+	prefetchCtx, prefetchCancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer prefetchCancel()
+	go prefetchOverviewCache(prefetchCtx)
 
 	p := tea.NewProgram(newModel(abs, isOverview), tea.WithAltScreen())
 	if err := p.Start(); err != nil {
@@ -509,7 +512,8 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 func (m model) updateKey(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 	// Handle delete confirmation
 	if m.deleteConfirm {
-		if msg.String() == "delete" || msg.String() == "backspace" {
+		switch msg.String() {
+		case "delete", "backspace":
 			// Confirm delete - start async deletion
 			if m.deleteTarget != nil {
 				m.deleteConfirm = false
@@ -525,17 +529,14 @@ func (m model) updateKey(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 			m.deleteConfirm = false
 			m.deleteTarget = nil
 			return m, nil
-		} else if msg.String() == "esc" || msg.String() == "q" {
+		case "esc", "q":
 			// Cancel delete with ESC or Q
 			m.status = "Cancelled"
 			m.deleteConfirm = false
 			m.deleteTarget = nil
 			return m, nil
-		} else {
-			// Any other key also cancels
-			m.status = "Cancelled"
-			m.deleteConfirm = false
-			m.deleteTarget = nil
+		default:
+			// Ignore other keys - keep showing confirmation
 			return m, nil
 		}
 	}

cmd/analyze/scanner.go

@@ -87,10 +87,10 @@ func scanPathConcurrent(root string, filesScanned, dirsScanned, bytesScanned *in
 			atomic.AddInt64(&total, size)
 
 			entryChan <- dirEntry{
-				Name:       child.Name() + " →",  // Add arrow to indicate symlink
+				Name:       child.Name() + " →", // Add arrow to indicate symlink
 				Path:       fullPath,
 				Size:       size,
-				IsDir:      false,  // Don't allow navigation into symlinks
+				IsDir:      false, // Don't allow navigation into symlinks
 				LastAccess: getLastAccessTimeFromInfo(info),
 			}
 			continue
@@ -189,10 +189,14 @@ func scanPathConcurrent(root string, filesScanned, dirsScanned, bytesScanned *in
 		entries = entries[:maxEntries]
 	}
 
-	// Try to use Spotlight for faster large file discovery
+	// Try to use Spotlight (mdfind) for faster large file discovery
+	// This is a performance optimization that gracefully falls back to scan results
+	// if Spotlight is unavailable or fails. The fallback is intentionally silent
+	// because users only care about correct results, not the method used.
 	if spotlightFiles := findLargeFilesWithSpotlight(root, minLargeFileSize); len(spotlightFiles) > 0 {
 		largeFiles = spotlightFiles
 	} else {
+		// Use files collected during scanning (fallback path)
 		// Sort and trim large files collected from scanning
 		sort.Slice(largeFiles, func(i, j int) bool {
 			return largeFiles[i].Size > largeFiles[j].Size

cmd/status/metrics_battery.go

@@ -0,0 +1,222 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/shirou/gopsutil/v3/host"
+)
+
+func collectBatteries() (batts []BatteryStatus, err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			// Swallow panics from platform-specific battery probes to keep the UI alive.
+			err = fmt.Errorf("battery collection failed: %v", r)
+		}
+	}()
+
+	// macOS: pmset
+	if runtime.GOOS == "darwin" && commandExists("pmset") {
+		if out, err := runCmd(context.Background(), "pmset", "-g", "batt"); err == nil {
+			if batts := parsePMSet(out); len(batts) > 0 {
+				return batts, nil
+			}
+		}
+	}
+
+	// Linux: /sys/class/power_supply
+	matches, _ := filepath.Glob("/sys/class/power_supply/BAT*/capacity")
+	for _, capFile := range matches {
+		statusFile := filepath.Join(filepath.Dir(capFile), "status")
+		capData, err := os.ReadFile(capFile)
+		if err != nil {
+			continue
+		}
+		statusData, _ := os.ReadFile(statusFile)
+		percentStr := strings.TrimSpace(string(capData))
+		percent, _ := strconv.ParseFloat(percentStr, 64)
+		status := strings.TrimSpace(string(statusData))
+		if status == "" {
+			status = "Unknown"
+		}
+		batts = append(batts, BatteryStatus{
+			Percent: percent,
+			Status:  status,
+		})
+	}
+	if len(batts) > 0 {
+		return batts, nil
+	}
+
+	return nil, errors.New("no battery data found")
+}
+
+func parsePMSet(raw string) []BatteryStatus {
+	lines := strings.Split(raw, "\n")
+	var out []BatteryStatus
+	var timeLeft string
+
+	for _, line := range lines {
+		// Check for time remaining
+		if strings.Contains(line, "remaining") {
+			// Extract time like "1:30 remaining"
+			parts := strings.Fields(line)
+			for i, p := range parts {
+				if p == "remaining" && i > 0 {
+					timeLeft = parts[i-1]
+				}
+			}
+		}
+
+		if !strings.Contains(line, "%") {
+			continue
+		}
+		fields := strings.Fields(line)
+		var (
+			percent float64
+			found   bool
+			status  = "Unknown"
+		)
+		for i, f := range fields {
+			if strings.Contains(f, "%") {
+				value := strings.TrimSuffix(strings.TrimSuffix(f, ";"), "%")
+				if p, err := strconv.ParseFloat(value, 64); err == nil {
+					percent = p
+					found = true
+					if i+1 < len(fields) {
+						status = strings.TrimSuffix(fields[i+1], ";")
+					}
+				}
+				break
+			}
+		}
+		if !found {
+			continue
+		}
+
+		// Get battery health and cycle count
+		health, cycles := getBatteryHealth()
+
+		out = append(out, BatteryStatus{
+			Percent:    percent,
+			Status:     status,
+			TimeLeft:   timeLeft,
+			Health:     health,
+			CycleCount: cycles,
+		})
+	}
+	return out
+}
+
+func getBatteryHealth() (string, int) {
+	if runtime.GOOS != "darwin" {
+		return "", 0
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
+	defer cancel()
+
+	out, err := runCmd(ctx, "system_profiler", "SPPowerDataType")
+	if err != nil {
+		return "", 0
+	}
+
+	var health string
+	var cycles int
+
+	lines := strings.Split(out, "\n")
+	for _, line := range lines {
+		lower := strings.ToLower(line)
+		if strings.Contains(lower, "cycle count") {
+			parts := strings.Split(line, ":")
+			if len(parts) == 2 {
+				cycles, _ = strconv.Atoi(strings.TrimSpace(parts[1]))
+			}
+		}
+		if strings.Contains(lower, "condition") {
+			parts := strings.Split(line, ":")
+			if len(parts) == 2 {
+				health = strings.TrimSpace(parts[1])
+			}
+		}
+	}
+	return health, cycles
+}
+
+func collectThermal() ThermalStatus {
+	if runtime.GOOS != "darwin" {
+		return ThermalStatus{}
+	}
+
+	var thermal ThermalStatus
+
+	// Get fan info from system_profiler
+	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
+	defer cancel()
+
+	out, err := runCmd(ctx, "system_profiler", "SPPowerDataType")
+	if err == nil {
+		lines := strings.Split(out, "\n")
+		for _, line := range lines {
+			lower := strings.ToLower(line)
+			if strings.Contains(lower, "fan") && strings.Contains(lower, "speed") {
+				parts := strings.Split(line, ":")
+				if len(parts) == 2 {
+					// Extract number from string like "1200 RPM"
+					numStr := strings.TrimSpace(parts[1])
+					numStr = strings.Split(numStr, " ")[0]
+					thermal.FanSpeed, _ = strconv.Atoi(numStr)
+				}
+			}
+		}
+	}
+
+	// Try to get CPU temperature using sudo powermetrics (may not work without sudo)
+	// Fallback: use SMC reader or estimate from thermal pressure
+	ctx2, cancel2 := context.WithTimeout(context.Background(), 500*time.Millisecond)
+	defer cancel2()
+
+	// Try thermal level as a proxy
+	out2, err := runCmd(ctx2, "sysctl", "-n", "machdep.xcpm.cpu_thermal_level")
+	if err == nil {
+		level, _ := strconv.Atoi(strings.TrimSpace(out2))
+		// Estimate temp: level 0-100 roughly maps to 40-100°C
+		if level >= 0 {
+			thermal.CPUTemp = 45 + float64(level)*0.5
+		}
+	}
+
+	return thermal
+}
+
+func collectSensors() ([]SensorReading, error) {
+	temps, err := host.SensorsTemperatures()
+	if err != nil {
+		return nil, err
+	}
+	var out []SensorReading
+	for _, t := range temps {
+		if t.Temperature <= 0 || t.Temperature > 150 {
+			continue
+		}
+		out = append(out, SensorReading{
+			Label: prettifyLabel(t.SensorKey),
+			Value: t.Temperature,
+			Unit:  "°C",
+		})
+	}
+	return out, nil
+}
+
+func prettifyLabel(key string) string {
+	key = strings.TrimSpace(key)
+	key = strings.TrimPrefix(key, "TC")
+	key = strings.ReplaceAll(key, "_", " ")
+	return key
+}

cmd/status/metrics_bluetooth.go

@@ -0,0 +1,140 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"runtime"
+	"strings"
+	"time"
+)
+
+const (
+	bluetoothCacheTTL   = 30 * time.Second
+	bluetoothctlTimeout = 1500 * time.Millisecond
+)
+
+func (c *Collector) collectBluetooth(now time.Time) []BluetoothDevice {
+	if len(c.lastBT) > 0 && !c.lastBTAt.IsZero() && now.Sub(c.lastBTAt) < bluetoothCacheTTL {
+		return c.lastBT
+	}
+
+	if devs, err := readSystemProfilerBluetooth(); err == nil && len(devs) > 0 {
+		c.lastBTAt = now
+		c.lastBT = devs
+		return devs
+	}
+
+	if devs, err := readBluetoothCTLDevices(); err == nil && len(devs) > 0 {
+		c.lastBTAt = now
+		c.lastBT = devs
+		return devs
+	}
+
+	c.lastBTAt = now
+	if len(c.lastBT) == 0 {
+		c.lastBT = []BluetoothDevice{{Name: "No Bluetooth info", Connected: false}}
+	}
+	return c.lastBT
+}
+
+func readSystemProfilerBluetooth() ([]BluetoothDevice, error) {
+	if runtime.GOOS != "darwin" || !commandExists("system_profiler") {
+		return nil, errors.New("system_profiler unavailable")
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), systemProfilerTimeout)
+	defer cancel()
+
+	out, err := runCmd(ctx, "system_profiler", "SPBluetoothDataType")
+	if err != nil {
+		return nil, err
+	}
+	return parseSPBluetooth(out), nil
+}
+
+func readBluetoothCTLDevices() ([]BluetoothDevice, error) {
+	if !commandExists("bluetoothctl") {
+		return nil, errors.New("bluetoothctl unavailable")
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), bluetoothctlTimeout)
+	defer cancel()
+
+	out, err := runCmd(ctx, "bluetoothctl", "info")
+	if err != nil {
+		return nil, err
+	}
+	return parseBluetoothctl(out), nil
+}
+
+func parseSPBluetooth(raw string) []BluetoothDevice {
+	lines := strings.Split(raw, "\n")
+	var devices []BluetoothDevice
+	var currentName string
+	var connected bool
+	var battery string
+
+	for _, line := range lines {
+		trim := strings.TrimSpace(line)
+		if len(trim) == 0 {
+			continue
+		}
+		if !strings.HasPrefix(line, "    ") && strings.HasSuffix(trim, ":") {
+			// Reset at top-level sections
+			currentName = ""
+			connected = false
+			battery = ""
+			continue
+		}
+		if strings.HasPrefix(line, "        ") && strings.HasSuffix(trim, ":") {
+			if currentName != "" {
+				devices = append(devices, BluetoothDevice{Name: currentName, Connected: connected, Battery: battery})
+			}
+			currentName = strings.TrimSuffix(trim, ":")
+			connected = false
+			battery = ""
+			continue
+		}
+		if strings.Contains(trim, "Connected:") {
+			connected = strings.Contains(trim, "Yes")
+		}
+		if strings.Contains(trim, "Battery Level:") {
+			battery = strings.TrimSpace(strings.TrimPrefix(trim, "Battery Level:"))
+		}
+	}
+	if currentName != "" {
+		devices = append(devices, BluetoothDevice{Name: currentName, Connected: connected, Battery: battery})
+	}
+	if len(devices) == 0 {
+		return []BluetoothDevice{{Name: "No devices", Connected: false}}
+	}
+	return devices
+}
+
+func parseBluetoothctl(raw string) []BluetoothDevice {
+	lines := strings.Split(raw, "\n")
+	var devices []BluetoothDevice
+	current := BluetoothDevice{}
+	for _, line := range lines {
+		trim := strings.TrimSpace(line)
+		if strings.HasPrefix(trim, "Device ") {
+			if current.Name != "" {
+				devices = append(devices, current)
+			}
+			current = BluetoothDevice{Name: strings.TrimPrefix(trim, "Device "), Connected: false}
+		}
+		if strings.HasPrefix(trim, "Name:") {
+			current.Name = strings.TrimSpace(strings.TrimPrefix(trim, "Name:"))
+		}
+		if strings.HasPrefix(trim, "Connected:") {
+			current.Connected = strings.Contains(trim, "yes")
+		}
+	}
+	if current.Name != "" {
+		devices = append(devices, current)
+	}
+	if len(devices) == 0 {
+		return []BluetoothDevice{{Name: "No devices", Connected: false}}
+	}
+	return devices
+}

cmd/status/metrics_cpu.go

@@ -0,0 +1,186 @@
+package main
+
+import (
+	"bufio"
+	"context"
+	"errors"
+	"runtime"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/shirou/gopsutil/v3/cpu"
+	"github.com/shirou/gopsutil/v3/load"
+)
+
+const (
+	cpuSampleInterval = 200 * time.Millisecond
+)
+
+func collectCPU() (CPUStatus, error) {
+	counts, countsErr := cpu.Counts(false)
+	if countsErr != nil || counts == 0 {
+		counts = runtime.NumCPU()
+	}
+
+	logical, logicalErr := cpu.Counts(true)
+	if logicalErr != nil || logical == 0 {
+		logical = runtime.NumCPU()
+	}
+	if logical <= 0 {
+		logical = 1
+	}
+
+	percents, err := cpu.Percent(cpuSampleInterval, true)
+	var totalPercent float64
+	perCoreEstimated := false
+	if err != nil || len(percents) == 0 {
+		fallbackUsage, fallbackPerCore, fallbackErr := fallbackCPUUtilization(logical)
+		if fallbackErr != nil {
+			if err != nil {
+				return CPUStatus{}, err
+			}
+			return CPUStatus{}, fallbackErr
+		}
+		totalPercent = fallbackUsage
+		percents = fallbackPerCore
+		perCoreEstimated = true
+	} else {
+		for _, v := range percents {
+			totalPercent += v
+		}
+		totalPercent /= float64(len(percents))
+	}
+
+	loadStats, loadErr := load.Avg()
+	var loadAvg load.AvgStat
+	if loadStats != nil {
+		loadAvg = *loadStats
+	}
+	if loadErr != nil || isZeroLoad(loadAvg) {
+		if fallback, err := fallbackLoadAvgFromUptime(); err == nil {
+			loadAvg = fallback
+		}
+	}
+
+	return CPUStatus{
+		Usage:            totalPercent,
+		PerCore:          percents,
+		PerCoreEstimated: perCoreEstimated,
+		Load1:            loadAvg.Load1,
+		Load5:            loadAvg.Load5,
+		Load15:           loadAvg.Load15,
+		CoreCount:        counts,
+		LogicalCPU:       logical,
+	}, nil
+}
+
+func isZeroLoad(avg load.AvgStat) bool {
+	return avg.Load1 == 0 && avg.Load5 == 0 && avg.Load15 == 0
+}
+
+func fallbackLoadAvgFromUptime() (load.AvgStat, error) {
+	if !commandExists("uptime") {
+		return load.AvgStat{}, errors.New("uptime command unavailable")
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
+	defer cancel()
+
+	out, err := runCmd(ctx, "uptime")
+	if err != nil {
+		return load.AvgStat{}, err
+	}
+
+	markers := []string{"load averages:", "load average:"}
+	idx := -1
+	for _, marker := range markers {
+		if pos := strings.LastIndex(out, marker); pos != -1 {
+			idx = pos + len(marker)
+			break
+		}
+	}
+	if idx == -1 {
+		return load.AvgStat{}, errors.New("load averages not found in uptime output")
+	}
+
+	segment := strings.TrimSpace(out[idx:])
+	fields := strings.Fields(segment)
+	var values []float64
+	for _, field := range fields {
+		field = strings.Trim(field, ",;")
+		if field == "" {
+			continue
+		}
+		val, err := strconv.ParseFloat(field, 64)
+		if err != nil {
+			continue
+		}
+		values = append(values, val)
+		if len(values) == 3 {
+			break
+		}
+	}
+	if len(values) < 3 {
+		return load.AvgStat{}, errors.New("could not parse load averages from uptime output")
+	}
+
+	return load.AvgStat{
+		Load1:  values[0],
+		Load5:  values[1],
+		Load15: values[2],
+	}, nil
+}
+
+func fallbackCPUUtilization(logical int) (float64, []float64, error) {
+	if logical <= 0 {
+		logical = runtime.NumCPU()
+	}
+	if logical <= 0 {
+		logical = 1
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
+	defer cancel()
+
+	out, err := runCmd(ctx, "ps", "-Aceo", "pcpu")
+	if err != nil {
+		return 0, nil, err
+	}
+
+	scanner := bufio.NewScanner(strings.NewReader(out))
+	total := 0.0
+	lineIndex := 0
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if line == "" {
+			continue
+		}
+		lineIndex++
+		if lineIndex == 1 && (strings.Contains(strings.ToLower(line), "cpu") || strings.Contains(line, "%")) {
+			continue
+		}
+
+		val, parseErr := strconv.ParseFloat(line, 64)
+		if parseErr != nil {
+			continue
+		}
+		total += val
+	}
+	if scanErr := scanner.Err(); scanErr != nil {
+		return 0, nil, scanErr
+	}
+
+	maxTotal := float64(logical * 100)
+	if total < 0 {
+		total = 0
+	} else if total > maxTotal {
+		total = maxTotal
+	}
+
+	perCore := make([]float64, logical)
+	avg := total / float64(logical)
+	for i := range perCore {
+		perCore[i] = avg
+	}
+	return total, perCore, nil
+}

cmd/status/metrics_disk.go

@@ -0,0 +1,199 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"runtime"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/shirou/gopsutil/v3/disk"
+)
+
+var skipDiskMounts = map[string]bool{
+	"/System/Volumes/VM":       true,
+	"/System/Volumes/Preboot":  true,
+	"/System/Volumes/Update":   true,
+	"/System/Volumes/xarts":    true,
+	"/System/Volumes/Hardware": true,
+	"/System/Volumes/Data":     true,
+	"/dev":                     true,
+}
+
+func collectDisks() ([]DiskStatus, error) {
+	partitions, err := disk.Partitions(false)
+	if err != nil {
+		return nil, err
+	}
+
+	var (
+		disks      []DiskStatus
+		seenDevice = make(map[string]bool)
+		seenVolume = make(map[string]bool)
+	)
+	for _, part := range partitions {
+		if strings.HasPrefix(part.Device, "/dev/loop") {
+			continue
+		}
+		if skipDiskMounts[part.Mountpoint] {
+			continue
+		}
+		if strings.HasPrefix(part.Mountpoint, "/System/Volumes/") {
+			continue
+		}
+		// Skip private volumes
+		if strings.HasPrefix(part.Mountpoint, "/private/") {
+			continue
+		}
+		baseDevice := baseDeviceName(part.Device)
+		if baseDevice == "" {
+			baseDevice = part.Device
+		}
+		if seenDevice[baseDevice] {
+			continue
+		}
+		usage, err := disk.Usage(part.Mountpoint)
+		if err != nil || usage.Total == 0 {
+			continue
+		}
+		// Skip small volumes (< 1GB)
+		if usage.Total < 1<<30 {
+			continue
+		}
+		// For APFS volumes, use a more precise dedup key (bytes level)
+		// to handle shared storage pools properly
+		volKey := fmt.Sprintf("%s:%d", part.Fstype, usage.Total)
+		if seenVolume[volKey] {
+			continue
+		}
+		disks = append(disks, DiskStatus{
+			Mount:       part.Mountpoint,
+			Device:      part.Device,
+			Used:        usage.Used,
+			Total:       usage.Total,
+			UsedPercent: usage.UsedPercent,
+			Fstype:      part.Fstype,
+		})
+		seenDevice[baseDevice] = true
+		seenVolume[volKey] = true
+	}
+
+	annotateDiskTypes(disks)
+
+	sort.Slice(disks, func(i, j int) bool {
+		return disks[i].Total > disks[j].Total
+	})
+
+	if len(disks) > 3 {
+		disks = disks[:3]
+	}
+
+	return disks, nil
+}
+
+func annotateDiskTypes(disks []DiskStatus) {
+	if len(disks) == 0 || runtime.GOOS != "darwin" || !commandExists("diskutil") {
+		return
+	}
+	cache := make(map[string]bool)
+	for i := range disks {
+		base := baseDeviceName(disks[i].Device)
+		if base == "" {
+			base = disks[i].Device
+		}
+		if val, ok := cache[base]; ok {
+			disks[i].External = val
+			continue
+		}
+		external, err := isExternalDisk(base)
+		if err != nil {
+			external = strings.HasPrefix(disks[i].Mount, "/Volumes/")
+		}
+		disks[i].External = external
+		cache[base] = external
+	}
+}
+
+func baseDeviceName(device string) string {
+	device = strings.TrimPrefix(device, "/dev/")
+	if !strings.HasPrefix(device, "disk") {
+		return device
+	}
+	for i := 4; i < len(device); i++ {
+		if device[i] == 's' {
+			return device[:i]
+		}
+	}
+	return device
+}
+
+func isExternalDisk(device string) (bool, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+
+	out, err := runCmd(ctx, "diskutil", "info", device)
+	if err != nil {
+		return false, err
+	}
+	var (
+		found    bool
+		external bool
+	)
+	for _, line := range strings.Split(out, "\n") {
+		trim := strings.TrimSpace(line)
+		if strings.HasPrefix(trim, "Internal:") {
+			found = true
+			external = strings.Contains(trim, "No")
+			break
+		}
+		if strings.HasPrefix(trim, "Device Location:") {
+			found = true
+			external = strings.Contains(trim, "External")
+		}
+	}
+	if !found {
+		return false, errors.New("diskutil info missing Internal field")
+	}
+	return external, nil
+}
+
+func (c *Collector) collectDiskIO(now time.Time) DiskIOStatus {
+	counters, err := disk.IOCounters()
+	if err != nil || len(counters) == 0 {
+		return DiskIOStatus{}
+	}
+
+	var total disk.IOCountersStat
+	for _, v := range counters {
+		total.ReadBytes += v.ReadBytes
+		total.WriteBytes += v.WriteBytes
+	}
+
+	if c.lastDiskAt.IsZero() {
+		c.prevDiskIO = total
+		c.lastDiskAt = now
+		return DiskIOStatus{}
+	}
+
+	elapsed := now.Sub(c.lastDiskAt).Seconds()
+	if elapsed <= 0 {
+		elapsed = 1
+	}
+
+	readRate := float64(total.ReadBytes-c.prevDiskIO.ReadBytes) / 1024 / 1024 / elapsed
+	writeRate := float64(total.WriteBytes-c.prevDiskIO.WriteBytes) / 1024 / 1024 / elapsed
+
+	c.prevDiskIO = total
+	c.lastDiskAt = now
+
+	if readRate < 0 {
+		readRate = 0
+	}
+	if writeRate < 0 {
+		writeRate = 0
+	}
+
+	return DiskIOStatus{ReadRate: readRate, WriteRate: writeRate}
+}

cmd/status/metrics_gpu.go

@@ -0,0 +1,131 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"runtime"
+	"strconv"
+	"strings"
+	"time"
+)
+
+const (
+	systemProfilerTimeout = 4 * time.Second
+	macGPUInfoTTL         = 10 * time.Minute
+)
+
+func (c *Collector) collectGPU(now time.Time) ([]GPUStatus, error) {
+	if runtime.GOOS == "darwin" {
+		if len(c.cachedGPU) > 0 && !c.lastGPUAt.IsZero() && now.Sub(c.lastGPUAt) < macGPUInfoTTL {
+			return c.cachedGPU, nil
+		}
+		if gpus, err := readMacGPUInfo(); err == nil && len(gpus) > 0 {
+			c.cachedGPU = gpus
+			c.lastGPUAt = now
+			return gpus, nil
+		}
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 600*time.Millisecond)
+	defer cancel()
+
+	if !commandExists("nvidia-smi") {
+		return []GPUStatus{{
+			Name: "No GPU metrics available",
+			Note: "Install nvidia-smi or use platform-specific metrics",
+		}}, nil
+	}
+
+	out, err := runCmd(ctx, "nvidia-smi", "--query-gpu=utilization.gpu,memory.used,memory.total,name", "--format=csv,noheader,nounits")
+	if err != nil {
+		return nil, err
+	}
+
+	lines := strings.Split(strings.TrimSpace(out), "\n")
+	var gpus []GPUStatus
+	for _, line := range lines {
+		fields := strings.Split(line, ",")
+		if len(fields) < 4 {
+			continue
+		}
+		util, _ := strconv.ParseFloat(strings.TrimSpace(fields[0]), 64)
+		memUsed, _ := strconv.ParseFloat(strings.TrimSpace(fields[1]), 64)
+		memTotal, _ := strconv.ParseFloat(strings.TrimSpace(fields[2]), 64)
+		name := strings.TrimSpace(fields[3])
+
+		gpus = append(gpus, GPUStatus{
+			Name:        name,
+			Usage:       util,
+			MemoryUsed:  memUsed,
+			MemoryTotal: memTotal,
+		})
+	}
+
+	if len(gpus) == 0 {
+		return []GPUStatus{{
+			Name: "GPU read failed",
+			Note: "Verify nvidia-smi availability",
+		}}, nil
+	}
+
+	return gpus, nil
+}
+
+func readMacGPUInfo() ([]GPUStatus, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), systemProfilerTimeout)
+	defer cancel()
+
+	if !commandExists("system_profiler") {
+		return nil, errors.New("system_profiler unavailable")
+	}
+
+	out, err := runCmd(ctx, "system_profiler", "-json", "SPDisplaysDataType")
+	if err != nil {
+		return nil, err
+	}
+
+	var data struct {
+		Displays []struct {
+			Name   string `json:"_name"`
+			VRAM   string `json:"spdisplays_vram"`
+			Vendor string `json:"spdisplays_vendor"`
+			Metal  string `json:"spdisplays_metal"`
+		} `json:"SPDisplaysDataType"`
+	}
+	if err := json.Unmarshal([]byte(out), &data); err != nil {
+		return nil, err
+	}
+
+	var gpus []GPUStatus
+	for _, d := range data.Displays {
+		if d.Name == "" {
+			continue
+		}
+		noteParts := []string{}
+		if d.VRAM != "" {
+			noteParts = append(noteParts, "VRAM "+d.VRAM)
+		}
+		if d.Metal != "" {
+			noteParts = append(noteParts, d.Metal)
+		}
+		if d.Vendor != "" {
+			noteParts = append(noteParts, d.Vendor)
+		}
+		note := strings.Join(noteParts, " · ")
+		gpus = append(gpus, GPUStatus{
+			Name:  d.Name,
+			Usage: -1,
+			Note:  note,
+		})
+	}
+
+	if len(gpus) == 0 {
+		return []GPUStatus{{
+			Name: "GPU info unavailable",
+			Note: "Unable to parse system_profiler output",
+		}}, nil
+	}
+
+	return gpus, nil
+}

cmd/status/metrics_hardware.go

@@ -0,0 +1,76 @@
+package main
+
+import (
+	"context"
+	"runtime"
+	"strings"
+	"time"
+)
+
+func collectHardware(totalRAM uint64, disks []DiskStatus) HardwareInfo {
+	if runtime.GOOS != "darwin" {
+		return HardwareInfo{
+			Model:     "Unknown",
+			CPUModel:  runtime.GOARCH,
+			TotalRAM:  humanBytes(totalRAM),
+			DiskSize:  "Unknown",
+			OSVersion: runtime.GOOS,
+		}
+	}
+
+	// Get model and CPU from system_profiler
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	defer cancel()
+
+	var model, cpuModel, osVersion string
+
+	// Get hardware overview
+	out, err := runCmd(ctx, "system_profiler", "SPHardwareDataType")
+	if err == nil {
+		lines := strings.Split(out, "\n")
+		for _, line := range lines {
+			lower := strings.ToLower(strings.TrimSpace(line))
+			// Prefer "Model Name" over "Model Identifier"
+			if strings.Contains(lower, "model name:") {
+				parts := strings.Split(line, ":")
+				if len(parts) == 2 {
+					model = strings.TrimSpace(parts[1])
+				}
+			}
+			if strings.Contains(lower, "chip:") {
+				parts := strings.Split(line, ":")
+				if len(parts) == 2 {
+					cpuModel = strings.TrimSpace(parts[1])
+				}
+			}
+			if strings.Contains(lower, "processor name:") && cpuModel == "" {
+				parts := strings.Split(line, ":")
+				if len(parts) == 2 {
+					cpuModel = strings.TrimSpace(parts[1])
+				}
+			}
+		}
+	}
+
+	// Get macOS version
+	ctx2, cancel2 := context.WithTimeout(context.Background(), 1*time.Second)
+	defer cancel2()
+	out2, err := runCmd(ctx2, "sw_vers", "-productVersion")
+	if err == nil {
+		osVersion = "macOS " + strings.TrimSpace(out2)
+	}
+
+	// Get disk size
+	diskSize := "Unknown"
+	if len(disks) > 0 {
+		diskSize = humanBytes(disks[0].Total)
+	}
+
+	return HardwareInfo{
+		Model:     model,
+		CPUModel:  cpuModel,
+		TotalRAM:  humanBytes(totalRAM),
+		DiskSize:  diskSize,
+		OSVersion: osVersion,
+	}
+}

cmd/status/metrics_health.go

@@ -0,0 +1,168 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+)
+
+// Health score calculation weights and thresholds
+const (
+	// Weights (must sum to ~100 for total score)
+	healthCPUWeight     = 30.0
+	healthMemWeight     = 25.0
+	healthDiskWeight    = 20.0
+	healthThermalWeight = 15.0
+	healthIOWeight      = 10.0
+
+	// CPU thresholds
+	cpuNormalThreshold = 30.0
+	cpuHighThreshold   = 70.0
+
+	// Memory thresholds
+	memNormalThreshold     = 50.0
+	memHighThreshold       = 80.0
+	memPressureWarnPenalty = 5.0
+	memPressureCritPenalty = 15.0
+
+	// Disk thresholds
+	diskWarnThreshold = 70.0
+	diskCritThreshold = 90.0
+
+	// Thermal thresholds
+	thermalNormalThreshold = 60.0
+	thermalHighThreshold   = 85.0
+
+	// Disk IO thresholds (MB/s)
+	ioNormalThreshold = 50.0
+	ioHighThreshold   = 150.0
+)
+
+func calculateHealthScore(cpu CPUStatus, mem MemoryStatus, disks []DiskStatus, diskIO DiskIOStatus, thermal ThermalStatus) (int, string) {
+	// Start with perfect score
+	score := 100.0
+	issues := []string{}
+
+	// CPU Usage (30% weight) - deduct up to 30 points
+	// 0-30% CPU = 0 deduction, 30-70% = linear, 70-100% = heavy penalty
+	cpuPenalty := 0.0
+	if cpu.Usage > cpuNormalThreshold {
+		if cpu.Usage > cpuHighThreshold {
+			cpuPenalty = healthCPUWeight * (cpu.Usage - cpuNormalThreshold) / cpuHighThreshold
+		} else {
+			cpuPenalty = (healthCPUWeight / 2) * (cpu.Usage - cpuNormalThreshold) / (cpuHighThreshold - cpuNormalThreshold)
+		}
+	}
+	score -= cpuPenalty
+	if cpu.Usage > cpuHighThreshold {
+		issues = append(issues, "High CPU")
+	}
+
+	// Memory Usage (25% weight) - deduct up to 25 points
+	// 0-50% = 0 deduction, 50-80% = linear, 80-100% = heavy penalty
+	memPenalty := 0.0
+	if mem.UsedPercent > memNormalThreshold {
+		if mem.UsedPercent > memHighThreshold {
+			memPenalty = healthMemWeight * (mem.UsedPercent - memNormalThreshold) / memNormalThreshold
+		} else {
+			memPenalty = (healthMemWeight / 2) * (mem.UsedPercent - memNormalThreshold) / (memHighThreshold - memNormalThreshold)
+		}
+	}
+	score -= memPenalty
+	if mem.UsedPercent > memHighThreshold {
+		issues = append(issues, "High Memory")
+	}
+
+	// Memory Pressure (extra penalty)
+	if mem.Pressure == "warn" {
+		score -= memPressureWarnPenalty
+		issues = append(issues, "Memory Pressure")
+	} else if mem.Pressure == "critical" {
+		score -= memPressureCritPenalty
+		issues = append(issues, "Critical Memory")
+	}
+
+	// Disk Usage (20% weight) - deduct up to 20 points
+	diskPenalty := 0.0
+	if len(disks) > 0 {
+		diskUsage := disks[0].UsedPercent
+		if diskUsage > diskWarnThreshold {
+			if diskUsage > diskCritThreshold {
+				diskPenalty = healthDiskWeight * (diskUsage - diskWarnThreshold) / (100 - diskWarnThreshold)
+			} else {
+				diskPenalty = (healthDiskWeight / 2) * (diskUsage - diskWarnThreshold) / (diskCritThreshold - diskWarnThreshold)
+			}
+		}
+		score -= diskPenalty
+		if diskUsage > diskCritThreshold {
+			issues = append(issues, "Disk Almost Full")
+		}
+	}
+
+	// Thermal (15% weight) - deduct up to 15 points
+	thermalPenalty := 0.0
+	if thermal.CPUTemp > 0 {
+		if thermal.CPUTemp > thermalNormalThreshold {
+			if thermal.CPUTemp > thermalHighThreshold {
+				thermalPenalty = healthThermalWeight
+				issues = append(issues, "Overheating")
+			} else {
+				thermalPenalty = healthThermalWeight * (thermal.CPUTemp - thermalNormalThreshold) / (thermalHighThreshold - thermalNormalThreshold)
+			}
+		}
+		score -= thermalPenalty
+	}
+
+	// Disk IO (10% weight) - deduct up to 10 points
+	ioPenalty := 0.0
+	totalIO := diskIO.ReadRate + diskIO.WriteRate
+	if totalIO > ioNormalThreshold {
+		if totalIO > ioHighThreshold {
+			ioPenalty = healthIOWeight
+			issues = append(issues, "Heavy Disk IO")
+		} else {
+			ioPenalty = healthIOWeight * (totalIO - ioNormalThreshold) / (ioHighThreshold - ioNormalThreshold)
+		}
+	}
+	score -= ioPenalty
+
+	// Ensure score is in valid range
+	if score < 0 {
+		score = 0
+	}
+	if score > 100 {
+		score = 100
+	}
+
+	// Generate message
+	msg := "Excellent"
+	if score >= 90 {
+		msg = "Excellent"
+	} else if score >= 75 {
+		msg = "Good"
+	} else if score >= 60 {
+		msg = "Fair"
+	} else if score >= 40 {
+		msg = "Poor"
+	} else {
+		msg = "Critical"
+	}
+
+	if len(issues) > 0 {
+		msg = msg + ": " + strings.Join(issues, ", ")
+	}
+
+	return int(score), msg
+}
+
+func formatUptime(secs uint64) string {
+	days := secs / 86400
+	hours := (secs % 86400) / 3600
+	mins := (secs % 3600) / 60
+	if days > 0 {
+		return fmt.Sprintf("%dd %dh %dm", days, hours, mins)
+	}
+	if hours > 0 {
+		return fmt.Sprintf("%dh %dm", hours, mins)
+	}
+	return fmt.Sprintf("%dm", mins)
+}

cmd/status/metrics_memory.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"context"
+	"runtime"
+	"strings"
+	"time"
+
+	"github.com/shirou/gopsutil/v3/mem"
+)
+
+func collectMemory() (MemoryStatus, error) {
+	vm, err := mem.VirtualMemory()
+	if err != nil {
+		return MemoryStatus{}, err
+	}
+
+	swap, _ := mem.SwapMemory()
+	pressure := getMemoryPressure()
+
+	return MemoryStatus{
+		Used:        vm.Used,
+		Total:       vm.Total,
+		UsedPercent: vm.UsedPercent,
+		SwapUsed:    swap.Used,
+		SwapTotal:   swap.Total,
+		Pressure:    pressure,
+	}, nil
+}
+
+func getMemoryPressure() string {
+	if runtime.GOOS != "darwin" {
+		return ""
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
+	defer cancel()
+	out, err := runCmd(ctx, "memory_pressure")
+	if err != nil {
+		return ""
+	}
+	lower := strings.ToLower(out)
+	if strings.Contains(lower, "critical") {
+		return "critical"
+	}
+	if strings.Contains(lower, "warn") {
+		return "warn"
+	}
+	if strings.Contains(lower, "normal") {
+		return "normal"
+	}
+	return ""
+}

cmd/status/metrics_network.go

@@ -0,0 +1,142 @@
+package main
+
+import (
+	"context"
+	"os"
+	"runtime"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/shirou/gopsutil/v3/net"
+)
+
+func (c *Collector) collectNetwork(now time.Time) ([]NetworkStatus, error) {
+	stats, err := net.IOCounters(true)
+	if err != nil {
+		return nil, err
+	}
+
+	// Get IP addresses for interfaces
+	ifAddrs := getInterfaceIPs()
+
+	if c.lastNetAt.IsZero() {
+		c.lastNetAt = now
+		for _, s := range stats {
+			c.prevNet[s.Name] = s
+		}
+		return nil, nil
+	}
+
+	elapsed := now.Sub(c.lastNetAt).Seconds()
+	if elapsed <= 0 {
+		elapsed = 1
+	}
+
+	var result []NetworkStatus
+	for _, cur := range stats {
+		if isNoiseInterface(cur.Name) {
+			continue
+		}
+		prev, ok := c.prevNet[cur.Name]
+		if !ok {
+			continue
+		}
+		rx := float64(cur.BytesRecv-prev.BytesRecv) / 1024.0 / 1024.0 / elapsed
+		tx := float64(cur.BytesSent-prev.BytesSent) / 1024.0 / 1024.0 / elapsed
+		if rx < 0 {
+			rx = 0
+		}
+		if tx < 0 {
+			tx = 0
+		}
+		result = append(result, NetworkStatus{
+			Name:      cur.Name,
+			RxRateMBs: rx,
+			TxRateMBs: tx,
+			IP:        ifAddrs[cur.Name],
+		})
+	}
+
+	c.lastNetAt = now
+	for _, s := range stats {
+		c.prevNet[s.Name] = s
+	}
+
+	sort.Slice(result, func(i, j int) bool {
+		return result[i].RxRateMBs+result[i].TxRateMBs > result[j].RxRateMBs+result[j].TxRateMBs
+	})
+	if len(result) > 3 {
+		result = result[:3]
+	}
+
+	return result, nil
+}
+
+func getInterfaceIPs() map[string]string {
+	result := make(map[string]string)
+	ifaces, err := net.Interfaces()
+	if err != nil {
+		return result
+	}
+	for _, iface := range ifaces {
+		for _, addr := range iface.Addrs {
+			// Only IPv4
+			if strings.Contains(addr.Addr, ".") && !strings.HasPrefix(addr.Addr, "127.") {
+				ip := strings.Split(addr.Addr, "/")[0]
+				result[iface.Name] = ip
+				break
+			}
+		}
+	}
+	return result
+}
+
+func isNoiseInterface(name string) bool {
+	lower := strings.ToLower(name)
+	noiseList := []string{"lo", "awdl", "utun", "llw", "bridge", "gif", "stf", "xhc", "anpi", "ap"}
+	for _, prefix := range noiseList {
+		if strings.HasPrefix(lower, prefix) {
+			return true
+		}
+	}
+	return false
+}
+
+func collectProxy() ProxyStatus {
+	// Check environment variables first
+	for _, env := range []string{"https_proxy", "HTTPS_PROXY", "http_proxy", "HTTP_PROXY"} {
+		if val := os.Getenv(env); val != "" {
+			proxyType := "HTTP"
+			if strings.HasPrefix(val, "socks") {
+				proxyType = "SOCKS"
+			}
+			// Extract host
+			host := val
+			if strings.Contains(host, "://") {
+				host = strings.SplitN(host, "://", 2)[1]
+			}
+			if idx := strings.Index(host, "@"); idx >= 0 {
+				host = host[idx+1:]
+			}
+			return ProxyStatus{Enabled: true, Type: proxyType, Host: host}
+		}
+	}
+
+	// macOS: check system proxy via scutil
+	if runtime.GOOS == "darwin" {
+		ctx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
+		defer cancel()
+		out, err := runCmd(ctx, "scutil", "--proxy")
+		if err == nil {
+			if strings.Contains(out, "HTTPEnable : 1") || strings.Contains(out, "HTTPSEnable : 1") {
+				return ProxyStatus{Enabled: true, Type: "System", Host: "System Proxy"}
+			}
+			if strings.Contains(out, "SOCKSEnable : 1") {
+				return ProxyStatus{Enabled: true, Type: "SOCKS", Host: "System Proxy"}
+			}
+		}
+	}
+
+	return ProxyStatus{Enabled: false}
+}

cmd/status/metrics_process.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"context"
+	"runtime"
+	"strconv"
+	"strings"
+	"time"
+)
+
+func collectTopProcesses() []ProcessInfo {
+	if runtime.GOOS != "darwin" {
+		return nil
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
+	defer cancel()
+
+	// Use ps to get top processes by CPU
+	out, err := runCmd(ctx, "ps", "-Aceo", "pcpu,pmem,comm", "-r")
+	if err != nil {
+		return nil
+	}
+
+	lines := strings.Split(strings.TrimSpace(out), "\n")
+	var procs []ProcessInfo
+	for i, line := range lines {
+		if i == 0 { // skip header
+			continue
+		}
+		if i > 5 { // top 5
+			break
+		}
+		fields := strings.Fields(line)
+		if len(fields) < 3 {
+			continue
+		}
+		cpuVal, _ := strconv.ParseFloat(fields[0], 64)
+		memVal, _ := strconv.ParseFloat(fields[1], 64)
+		name := fields[len(fields)-1]
+		// Get just the process name without path
+		if idx := strings.LastIndex(name, "/"); idx >= 0 {
+			name = name[idx+1:]
+		}
+		procs = append(procs, ProcessInfo{
+			Name:   name,
+			CPU:    cpuVal,
+			Memory: memVal,
+		})
+	}
+	return procs
+}