Usage: add cost summaries to /usage + mac menu

apps/macos/Sources/Clawdbot/CostUsageMenuView.swift

@@ -0,0 +1,99 @@
+import Charts
+import SwiftUI
+
+struct CostUsageHistoryMenuView: View {
+    let summary: GatewayCostUsageSummary
+    let width: CGFloat
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 10) {
+            self.header
+            self.chart
+            self.footer
+        }
+        .padding(.horizontal, 12)
+        .padding(.vertical, 10)
+        .frame(width: max(1, self.width), alignment: .leading)
+    }
+
+    private var header: some View {
+        let todayKey = CostUsageMenuDateParser.format(Date())
+        let todayEntry = self.summary.daily.first { $0.date == todayKey }
+        let todayCost = CostUsageFormatting.formatUsd(todayEntry?.totalCost) ?? "n/a"
+        let totalCost = CostUsageFormatting.formatUsd(self.summary.totals.totalCost) ?? "n/a"
+
+        return HStack(alignment: .firstTextBaseline, spacing: 12) {
+            VStack(alignment: .leading, spacing: 2) {
+                Text("Today")
+                    .font(.caption2)
+                    .foregroundStyle(.secondary)
+                Text(todayCost)
+                    .font(.system(size: 14, weight: .semibold))
+            }
+            VStack(alignment: .leading, spacing: 2) {
+                Text("Last \(self.summary.days)d")
+                    .font(.caption2)
+                    .foregroundStyle(.secondary)
+                Text(totalCost)
+                    .font(.system(size: 14, weight: .semibold))
+            }
+            Spacer()
+        }
+    }
+
+    private var chart: some View {
+        let entries = self.summary.daily.compactMap { entry -> (Date, Double)? in
+            guard let date = CostUsageMenuDateParser.parse(entry.date) else { return nil }
+            return (date, entry.totalCost)
+        }
+
+        return Chart(entries, id: \.0) { entry in
+            BarMark(
+                x: .value("Day", entry.0),
+                y: .value("Cost", entry.1))
+                .foregroundStyle(Color.accentColor)
+                .cornerRadius(3)
+        }
+        .chartXAxis {
+            AxisMarks(values: .stride(by: .day, count: 7)) {
+                AxisGridLine().foregroundStyle(.clear)
+                AxisValueLabel(format: .dateTime.month().day())
+            }
+        }
+        .chartYAxis {
+            AxisMarks(position: .leading) {
+                AxisGridLine()
+                AxisValueLabel()
+            }
+        }
+        .frame(height: 110)
+    }
+
+    private var footer: some View {
+        if self.summary.totals.missingCostEntries == 0 {
+            return AnyView(EmptyView())
+        }
+        return AnyView(
+            Text("Partial: \(self.summary.totals.missingCostEntries) entries missing cost")
+                .font(.caption2)
+                .foregroundStyle(.secondary))
+    }
+}
+
+private enum CostUsageMenuDateParser {
+    static let formatter: DateFormatter = {
+        let formatter = DateFormatter()
+        formatter.dateFormat = "yyyy-MM-dd"
+        formatter.locale = Locale(identifier: "en_US_POSIX")
+        formatter.timeZone = TimeZone.current
+        return formatter
+    }()
+
+    static func parse(_ value: String) -> Date? {
+        self.formatter.date(from: value)
+    }
+
+    static func format(_ date: Date) -> String {
+        self.formatter.string(from: date)
+    }
+}

apps/macos/Sources/Clawdbot/MenuSessionsInjector.swift

@@ -27,6 +27,10 @@ final class MenuSessionsInjector: NSObject, NSMenuDelegate {
     private var cachedUsageErrorText: String?
     private var usageCacheUpdatedAt: Date?
     private let usageRefreshIntervalSeconds: TimeInterval = 30
+    private var cachedCostSummary: GatewayCostUsageSummary?
+    private var cachedCostErrorText: String?
+    private var costCacheUpdatedAt: Date?
+    private let costRefreshIntervalSeconds: TimeInterval = 45
     private let nodesStore = NodesStore.shared
     #if DEBUG
     private var testControlChannelConnected: Bool?
@@ -64,6 +68,7 @@ final class MenuSessionsInjector: NSObject, NSMenuDelegate {
             guard let self else { return }
             await self.refreshCache(force: forceRefresh)
             await self.refreshUsageCache(force: forceRefresh)
+            await self.refreshCostUsageCache(force: forceRefresh)
             await MainActor.run {
                 guard self.isMenuOpen else { return }
                 self.inject(into: menu)
@@ -200,6 +205,7 @@ extension MenuSessionsInjector {
         }
 
         cursor = self.insertUsageSection(into: menu, at: cursor, width: width)
+        cursor = self.insertCostUsageSection(into: menu, at: cursor, width: width)
 
         DispatchQueue.main.async { [weak self, weak headerView] in
             guard let self, let headerView else { return }
@@ -344,6 +350,28 @@ extension MenuSessionsInjector {
         return cursor
     }
 
+    private func insertCostUsageSection(into menu: NSMenu, at cursor: Int, width: CGFloat) -> Int {
+        guard self.isControlChannelConnected else { return cursor }
+        guard let submenu = self.buildCostUsageSubmenu(width: width) else { return cursor }
+        var cursor = cursor
+
+        if cursor > 0, !menu.items[cursor - 1].isSeparatorItem {
+            let separator = NSMenuItem.separator()
+            separator.tag = self.tag
+            menu.insertItem(separator, at: cursor)
+            cursor += 1
+        }
+
+        let item = NSMenuItem(title: "Usage cost (30 days)", action: nil, keyEquivalent: "")
+        item.tag = self.tag
+        item.isEnabled = true
+        item.image = NSImage(systemSymbolName: "chart.bar.xaxis", accessibilityDescription: nil)
+        item.submenu = submenu
+        menu.insertItem(item, at: cursor)
+        cursor += 1
+        return cursor
+    }
+
     private var selectedUsageProviderId: String? {
         guard let model = self.cachedSnapshot?.defaults.model.nonEmpty else { return nil }
         let trimmed = model.trimmingCharacters(in: .whitespacesAndNewlines)
@@ -393,6 +421,36 @@ extension MenuSessionsInjector {
         }
     }
 
+    private func buildCostUsageSubmenu(width: CGFloat) -> NSMenu? {
+        if let error = self.cachedCostErrorText, !error.isEmpty, self.cachedCostSummary == nil {
+            let menu = NSMenu()
+            let item = NSMenuItem(title: error, action: nil, keyEquivalent: "")
+            item.isEnabled = false
+            menu.addItem(item)
+            return menu
+        }
+
+        guard let summary = self.cachedCostSummary else { return nil }
+        guard !summary.daily.isEmpty else { return nil }
+
+        let menu = NSMenu()
+        menu.delegate = self
+
+        let chartView = CostUsageHistoryMenuView(summary: summary, width: width)
+        let hosting = NSHostingView(rootView: AnyView(chartView))
+        let controller = NSHostingController(rootView: AnyView(chartView))
+        let size = controller.sizeThatFits(in: CGSize(width: width, height: .greatestFiniteMagnitude))
+        hosting.frame = NSRect(origin: .zero, size: NSSize(width: width, height: size.height))
+
+        let chartItem = NSMenuItem()
+        chartItem.view = hosting
+        chartItem.isEnabled = false
+        chartItem.representedObject = "costUsageChart"
+        menu.addItem(chartItem)
+
+        return menu
+    }
+
     private func gatewayEntry() -> NodeInfo? {
         let mode = AppStateStore.shared.connectionMode
         let isConnected = self.isControlChannelConnected
@@ -581,6 +639,31 @@ extension MenuSessionsInjector {
         self.usageCacheUpdatedAt = Date()
     }
 
+    private func refreshCostUsageCache(force: Bool) async {
+        if !force,
+           let updated = self.costCacheUpdatedAt,
+           Date().timeIntervalSince(updated) < self.costRefreshIntervalSeconds
+        {
+            return
+        }
+
+        guard self.isControlChannelConnected else {
+            self.cachedCostSummary = nil
+            self.cachedCostErrorText = nil
+            self.costCacheUpdatedAt = Date()
+            return
+        }
+
+        do {
+            self.cachedCostSummary = try await CostUsageLoader.loadSummary()
+            self.cachedCostErrorText = nil
+        } catch {
+            self.cachedCostSummary = nil
+            self.cachedCostErrorText = self.compactUsageError(error)
+        }
+        self.costCacheUpdatedAt = Date()
+    }
+
     private func compactUsageError(_ error: Error) -> String {
         let message = error.localizedDescription.trimmingCharacters(in: .whitespacesAndNewlines)
         if message.isEmpty { return "Usage unavailable" }

apps/macos/Sources/Clawdbot/UsageCostData.swift

@@ -0,0 +1,60 @@
+import Foundation
+
+struct GatewayCostUsageTotals: Codable {
+    let input: Int
+    let output: Int
+    let cacheRead: Int
+    let cacheWrite: Int
+    let totalTokens: Int
+    let totalCost: Double
+    let missingCostEntries: Int
+}
+
+struct GatewayCostUsageDay: Codable {
+    let date: String
+    let input: Int
+    let output: Int
+    let cacheRead: Int
+    let cacheWrite: Int
+    let totalTokens: Int
+    let totalCost: Double
+    let missingCostEntries: Int
+}
+
+struct GatewayCostUsageSummary: Codable {
+    let updatedAt: Double
+    let days: Int
+    let daily: [GatewayCostUsageDay]
+    let totals: GatewayCostUsageTotals
+}
+
+enum CostUsageFormatting {
+    static func formatUsd(_ value: Double?) -> String? {
+        guard let value, value.isFinite else { return nil }
+        if value >= 1 { return String(format: "$%.2f", value) }
+        if value >= 0.01 { return String(format: "$%.2f", value) }
+        return String(format: "$%.4f", value)
+    }
+
+    static func formatTokenCount(_ value: Int?) -> String? {
+        guard let value else { return nil }
+        let safe = max(0, value)
+        if safe >= 1_000_000 { return String(format: "%.1fm", Double(safe) / 1_000_000.0) }
+        if safe >= 1000 { return safe >= 10000
+            ? String(format: "%.0fk", Double(safe) / 1000.0)
+            : String(format: "%.1fk", Double(safe) / 1000.0)
+        }
+        return String(safe)
+    }
+}
+
+@MainActor
+enum CostUsageLoader {
+    static func loadSummary() async throws -> GatewayCostUsageSummary {
+        let data = try await ControlChannel.shared.request(
+            method: "usage.cost",
+            params: nil,
+            timeoutMs: 7000)
+        return try JSONDecoder().decode(GatewayCostUsageSummary.self, from: data)
+    }
+}