feat: persistent token tracking with global stats aggregation

- Add restoreTokens() method to Session class for recovery after restart
- Add GlobalStats type for cumulative usage tracking across all sessions
- Accumulate tokens from deleted sessions into global stats
- Track lifetime session count with incrementSessionsCreated()
- Add /api/stats endpoint for global stats
- Include globalStats in /api/status response
- Frontend shows aggregate tokens + cost in header
- Fix respawn controller config to filter undefined values
- Add 7 new tests for global stats functionality (v0.1343)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/respawn-controller.ts

@@ -662,7 +662,11 @@ export class RespawnController extends EventEmitter {
   constructor(session: Session, config: Partial<RespawnConfig> = {}) {
     super();
     this.session = session;
-    this.config = { ...DEFAULT_CONFIG, ...config };
+    // Filter out undefined values from config to prevent overwriting defaults
+    const filteredConfig = Object.fromEntries(
+      Object.entries(config).filter(([, v]) => v !== undefined)
+    ) as Partial<RespawnConfig>;
+    this.config = { ...DEFAULT_CONFIG, ...filteredConfig };
     this.aiChecker = new AiIdleChecker(session.id, {
       enabled: this.config.aiIdleCheckEnabled,
       model: this.config.aiIdleCheckModel,
@@ -2169,7 +2173,11 @@ export class RespawnController extends EventEmitter {
    * @fires log - With updated config details
    */
   updateConfig(config: Partial<RespawnConfig>): void {
-    this.config = { ...this.config, ...config };
+    // Filter out undefined values to prevent overwriting existing config with undefined
+    const filteredConfig = Object.fromEntries(
+      Object.entries(config).filter(([, v]) => v !== undefined)
+    ) as Partial<RespawnConfig>;
+    this.config = { ...this.config, ...filteredConfig };
 
     // Sync AI checker config if relevant fields changed
     if (config.aiIdleCheckEnabled !== undefined || config.aiIdleCheckModel !== undefined ||

src/session.ts

@@ -571,6 +571,16 @@ export class Session extends EventEmitter {
     return this._totalOutputTokens;
   }
 
+  /**
+   * Restore token and cost values from saved state.
+   * Called when recovering sessions after server restart.
+   */
+  restoreTokens(inputTokens: number, outputTokens: number, totalCost: number): void {
+    this._totalInputTokens = inputTokens;
+    this._totalOutputTokens = outputTokens;
+    this._totalCost = totalCost;
+  }
+
   get autoClearThreshold(): number {
     return this._autoClearThreshold;
   }

src/state-store.ts

@@ -17,7 +17,7 @@
 import { readFileSync, writeFileSync, existsSync, mkdirSync } from 'node:fs';
 import { homedir } from 'node:os';
 import { dirname, join } from 'node:path';
-import { AppState, createInitialState, RalphSessionState, createInitialRalphSessionState } from './types.js';
+import { AppState, createInitialState, RalphSessionState, createInitialRalphSessionState, GlobalStats, createInitialGlobalStats } from './types.js';
 
 /** Debounce delay for batching state writes (ms) */
 const SAVE_DEBOUNCE_MS = 500;
@@ -208,6 +208,70 @@ export class StateStore {
     this.saveRalphStatesNow();
   }
 
+  // ========== Global Stats Methods ==========
+
+  /** Returns global stats, creating initial stats if needed. */
+  getGlobalStats(): GlobalStats {
+    if (!this.state.globalStats) {
+      this.state.globalStats = createInitialGlobalStats();
+    }
+    return this.state.globalStats;
+  }
+
+  /**
+   * Adds tokens and cost to global stats.
+   * Call when a session is deleted to preserve its usage in lifetime stats.
+   */
+  addToGlobalStats(inputTokens: number, outputTokens: number, cost: number): void {
+    const stats = this.getGlobalStats();
+    stats.totalInputTokens += inputTokens;
+    stats.totalOutputTokens += outputTokens;
+    stats.totalCost += cost;
+    stats.lastUpdatedAt = Date.now();
+    this.save();
+  }
+
+  /** Increments the total sessions created counter. */
+  incrementSessionsCreated(): void {
+    const stats = this.getGlobalStats();
+    stats.totalSessionsCreated += 1;
+    stats.lastUpdatedAt = Date.now();
+    this.save();
+  }
+
+  /**
+   * Returns aggregate stats combining global (deleted sessions) + active sessions.
+   * @param activeSessions Map of active session states
+   */
+  getAggregateStats(activeSessions: Record<string, { inputTokens?: number; outputTokens?: number; totalCost?: number }>): {
+    totalInputTokens: number;
+    totalOutputTokens: number;
+    totalCost: number;
+    totalSessionsCreated: number;
+    activeSessionsCount: number;
+  } {
+    const global = this.getGlobalStats();
+    let activeInput = 0;
+    let activeOutput = 0;
+    let activeCost = 0;
+    let activeCount = 0;
+
+    for (const session of Object.values(activeSessions)) {
+      activeInput += session.inputTokens ?? 0;
+      activeOutput += session.outputTokens ?? 0;
+      activeCost += session.totalCost ?? 0;
+      activeCount++;
+    }
+
+    return {
+      totalInputTokens: global.totalInputTokens + activeInput,
+      totalOutputTokens: global.totalOutputTokens + activeOutput,
+      totalCost: global.totalCost + activeCost,
+      totalSessionsCreated: global.totalSessionsCreated,
+      activeSessionsCount: activeCount,
+    };
+  }
+
   // ========== Inner State Methods (Ralph Loop tracking) ==========
 
   private loadRalphStates(): void {

src/types.ts

@@ -88,6 +88,27 @@ export interface SessionState {
   childAgentIds?: string[];
 }
 
+// ========== Global Stats Types ==========
+
+/**
+ * Global statistics across all sessions (including deleted ones).
+ * Persisted to track cumulative usage over time.
+ */
+export interface GlobalStats {
+  /** Total input tokens used across all sessions */
+  totalInputTokens: number;
+  /** Total output tokens used across all sessions */
+  totalOutputTokens: number;
+  /** Total cost in USD across all sessions */
+  totalCost: number;
+  /** Total number of sessions created (lifetime) */
+  totalSessionsCreated: number;
+  /** Timestamp when stats were first recorded */
+  firstRecordedAt: number;
+  /** Timestamp of last update */
+  lastUpdatedAt: number;
+}
+
 // ========== Task Types ==========
 
 /**
@@ -178,6 +199,8 @@ export interface AppState {
   ralphLoop: RalphLoopState;
   /** Application configuration */
   config: AppConfig;
+  /** Global statistics (cumulative across all sessions) */
+  globalStats?: GlobalStats;
 }
 
 // ========== Respawn Controller Types ==========
@@ -744,6 +767,23 @@ export function createInitialState(): AppState {
       lastCheckAt: null,
     },
     config: { ...DEFAULT_CONFIG },
+    globalStats: createInitialGlobalStats(),
+  };
+}
+
+/**
+ * Creates initial global stats object
+ * @returns Fresh global stats with zero values
+ */
+export function createInitialGlobalStats(): GlobalStats {
+  const now = Date.now();
+  return {
+    totalInputTokens: 0,
+    totalOutputTokens: 0,
+    totalCost: 0,
+    totalSessionsCreated: 0,
+    firstRecordedAt: now,
+    lastUpdatedAt: now,
   };
 }
 

src/web/public/app.js

@@ -355,6 +355,7 @@ class ClaudemanApp {
     this.cases = [];
     this.currentRun = null;
     this.totalTokens = 0;
+    this.globalStats = null; // Global token/cost stats across all sessions
     this.eventSource = null;
     this.terminal = null;
     this.fitAddon = null;
@@ -1298,6 +1299,11 @@ class ClaudemanApp {
       this.respawnStatus = data.respawnStatus;
     }
 
+    // Store global stats for aggregate tracking
+    if (data.globalStats) {
+      this.globalStats = data.globalStats;
+    }
+
     this.totalCost = data.sessions.reduce((sum, s) => sum + (s.totalCost || 0), 0);
     this.totalCost += data.scheduledRuns.reduce((sum, r) => sum + (r.totalCost || 0), 0);
 
@@ -2404,15 +2410,30 @@ class ClaudemanApp {
   }
 
   updateTokens() {
+    // Use global stats if available (includes deleted sessions)
     let total = 0;
-    this.sessions.forEach(s => {
-      if (s.tokens) {
-        total += s.tokens.total || 0;
-      }
-    });
+    if (this.globalStats) {
+      total = this.globalStats.totalInputTokens + this.globalStats.totalOutputTokens;
+    } else {
+      // Fallback to active sessions only
+      this.sessions.forEach(s => {
+        if (s.tokens) {
+          total += s.tokens.total || 0;
+        }
+      });
+    }
     this.totalTokens = total;
     const display = total >= 1000 ? `${(total / 1000).toFixed(1)}k` : total;
-    this.$('headerTokens').textContent = `${display} tokens`;
+
+    // Show global cost if available
+    const costDisplay = this.globalStats ? `$${this.globalStats.totalCost.toFixed(2)}` : '';
+    const tokenEl = this.$('headerTokens');
+    if (tokenEl) {
+      tokenEl.textContent = costDisplay ? `${display} tokens · ${costDisplay}` : `${display} tokens`;
+      tokenEl.title = this.globalStats
+        ? `Lifetime: ${this.globalStats.totalSessionsCreated} sessions created`
+        : 'Token usage across active sessions';
+    }
   }
 
   // ========== Session Options Modal ==========

src/web/server.ts

@@ -319,6 +319,23 @@ export class WebServer extends EventEmitter {
     // API Routes
     this.app.get('/api/status', async () => this.getFullState());
 
+    // Global stats endpoint
+    this.app.get('/api/stats', async () => {
+      const activeSessionTokens: Record<string, { inputTokens?: number; outputTokens?: number; totalCost?: number }> = {};
+      for (const [sessionId, session] of this.sessions) {
+        activeSessionTokens[sessionId] = {
+          inputTokens: session.inputTokens,
+          outputTokens: session.outputTokens,
+          totalCost: session.totalCost,
+        };
+      }
+      return {
+        success: true,
+        stats: this.store.getAggregateStats(activeSessionTokens),
+        raw: this.store.getGlobalStats(),
+      };
+    });
+
     this.app.get('/api/config', async () => {
       return { success: true, config: this.store.getConfig() };
     });
@@ -352,6 +369,7 @@ export class WebServer extends EventEmitter {
       });
 
       this.sessions.set(session.id, session);
+      this.store.incrementSessionsCreated();
       this.persistSessionState(session);
       this.setupSessionListeners(session);
 
@@ -821,15 +839,15 @@ export class WebServer extends EventEmitter {
         autoAcceptPrompts: config.autoAcceptPrompts ?? currentConfig?.autoAcceptPrompts ?? true,
         autoAcceptDelayMs: config.autoAcceptDelayMs ?? currentConfig?.autoAcceptDelayMs ?? 8000,
         aiIdleCheckEnabled: config.aiIdleCheckEnabled ?? currentConfig?.aiIdleCheckEnabled ?? true,
-        aiIdleCheckModel: config.aiIdleCheckModel ?? currentConfig?.aiIdleCheckModel,
-        aiIdleCheckMaxContext: config.aiIdleCheckMaxContext ?? currentConfig?.aiIdleCheckMaxContext,
-        aiIdleCheckTimeoutMs: config.aiIdleCheckTimeoutMs ?? currentConfig?.aiIdleCheckTimeoutMs,
-        aiIdleCheckCooldownMs: config.aiIdleCheckCooldownMs ?? currentConfig?.aiIdleCheckCooldownMs,
+        aiIdleCheckModel: config.aiIdleCheckModel ?? currentConfig?.aiIdleCheckModel ?? 'claude-opus-4-5-20251101',
+        aiIdleCheckMaxContext: config.aiIdleCheckMaxContext ?? currentConfig?.aiIdleCheckMaxContext ?? 16000,
+        aiIdleCheckTimeoutMs: config.aiIdleCheckTimeoutMs ?? currentConfig?.aiIdleCheckTimeoutMs ?? 90000,
+        aiIdleCheckCooldownMs: config.aiIdleCheckCooldownMs ?? currentConfig?.aiIdleCheckCooldownMs ?? 180000,
         aiPlanCheckEnabled: config.aiPlanCheckEnabled ?? currentConfig?.aiPlanCheckEnabled ?? true,
-        aiPlanCheckModel: config.aiPlanCheckModel ?? currentConfig?.aiPlanCheckModel,
-        aiPlanCheckMaxContext: config.aiPlanCheckMaxContext ?? currentConfig?.aiPlanCheckMaxContext,
-        aiPlanCheckTimeoutMs: config.aiPlanCheckTimeoutMs ?? currentConfig?.aiPlanCheckTimeoutMs,
-        aiPlanCheckCooldownMs: config.aiPlanCheckCooldownMs ?? currentConfig?.aiPlanCheckCooldownMs,
+        aiPlanCheckModel: config.aiPlanCheckModel ?? currentConfig?.aiPlanCheckModel ?? 'claude-opus-4-5-20251101',
+        aiPlanCheckMaxContext: config.aiPlanCheckMaxContext ?? currentConfig?.aiPlanCheckMaxContext ?? 8000,
+        aiPlanCheckTimeoutMs: config.aiPlanCheckTimeoutMs ?? currentConfig?.aiPlanCheckTimeoutMs ?? 60000,
+        aiPlanCheckCooldownMs: config.aiPlanCheckCooldownMs ?? currentConfig?.aiPlanCheckCooldownMs ?? 30000,
         durationMinutes: currentConfig?.durationMinutes,
       };
       this.screenManager.updateRespawnConfig(id, merged);
@@ -1024,6 +1042,7 @@ export class WebServer extends EventEmitter {
 
       const session = new Session({ workingDir: dir });
       this.sessions.set(session.id, session);
+      this.store.incrementSessionsCreated();
       this.persistSessionState(session);
       this.setupSessionListeners(session);
 
@@ -1321,6 +1340,7 @@ export class WebServer extends EventEmitter {
       }
 
       this.sessions.set(session.id, session);
+      this.store.incrementSessionsCreated();
       this.persistSessionState(session);
       this.setupSessionListeners(session);
       this.broadcast('session:created', session.toDetailedState());
@@ -1688,6 +1708,13 @@ export class WebServer extends EventEmitter {
 
     // Stop session and remove listeners
     if (session) {
+      // Accumulate tokens to global stats before removing session
+      // This preserves lifetime usage even after sessions are deleted
+      if (killScreen && (session.inputTokens > 0 || session.outputTokens > 0 || session.totalCost > 0)) {
+        this.store.addToGlobalStats(session.inputTokens, session.outputTokens, session.totalCost);
+        console.log(`[Server] Added to global stats: ${session.inputTokens + session.outputTokens} tokens, $${session.totalCost.toFixed(4)} from session ${sessionId}`);
+      }
+
       session.removeAllListeners();
       await session.stop(killScreen);
       this.sessions.delete(sessionId);
@@ -1909,6 +1936,7 @@ export class WebServer extends EventEmitter {
         });
 
         this.sessions.set(session.id, session);
+        this.store.incrementSessionsCreated();
         this.setupSessionListeners(session);
         session.parentAgentId = name;
 
@@ -2088,6 +2116,7 @@ export class WebServer extends EventEmitter {
         // Create a session for this iteration
         session = new Session({ workingDir: run.workingDir });
         this.sessions.set(session.id, session);
+        this.store.incrementSessionsCreated();
         this.persistSessionState(session);
         this.setupSessionListeners(session);
         run.sessionId = session.id;
@@ -2191,11 +2220,22 @@ export class WebServer extends EventEmitter {
       respawnStatus[sessionId] = controller.getStatus();
     }
 
+    // Build active sessions token map for aggregate calculation
+    const activeSessionTokens: Record<string, { inputTokens?: number; outputTokens?: number; totalCost?: number }> = {};
+    for (const [sessionId, session] of this.sessions) {
+      activeSessionTokens[sessionId] = {
+        inputTokens: session.inputTokens,
+        outputTokens: session.outputTokens,
+        totalCost: session.totalCost,
+      };
+    }
+
     return {
       version: APP_VERSION,
       sessions: this.getSessionsState(),
       scheduledRuns: Array.from(this.scheduledRuns.values()),
       respawnStatus,
+      globalStats: this.store.getAggregateStats(activeSessionTokens),
       timestamp: Date.now(),
     };
   }
@@ -2449,6 +2489,18 @@ export class WebServer extends EventEmitter {
                   savedState.autoClearThreshold
                 );
               }
+              // Token tracking
+              if (savedState.inputTokens !== undefined || savedState.outputTokens !== undefined || savedState.totalCost !== undefined) {
+                session.restoreTokens(
+                  savedState.inputTokens ?? 0,
+                  savedState.outputTokens ?? 0,
+                  savedState.totalCost ?? 0
+                );
+                const totalTokens = (savedState.inputTokens ?? 0) + (savedState.outputTokens ?? 0);
+                if (totalTokens > 0) {
+                  console.log(`[Server] Restored tokens for session ${session.id}: ${totalTokens} tokens, $${(savedState.totalCost ?? 0).toFixed(4)}`);
+                }
+              }
               // Ralph / Todo tracker
               if (savedState.ralphEnabled) {
                 session.ralphTracker.enable();