Function saveCurrentSessionCosts

src/cost-tracker.ts:144–176

(fpsMetrics?: FpsMetrics)

 * Call this before switching sessions to avoid losing accumulated costs.
 */
export function saveCurrentSessionCosts(fpsMetrics?: FpsMetrics): void {
  saveCurrentProjectConfig(current => ({
    ...current,
    lastCost: getTotalCostUSD(),
    lastAPIDuration: getTotalAPIDuration(),
    lastAPIDurationWithoutRetries: getTotalAPIDurationWithoutRetries(),
    lastToolDuration: getTotalToolDuration(),
    lastDuration: getTotalDuration(),
    lastLinesAdded: getTotalLinesAdded(),
    lastLinesRemoved: getTotalLinesRemoved(),
    lastTotalInputTokens: getTotalInputTokens(),
    lastTotalOutputTokens: getTotalOutputTokens(),
    lastTotalCacheCreationInputTokens: getTotalCacheCreationInputTokens(),
    lastTotalCacheReadInputTokens: getTotalCacheReadInputTokens(),
    lastTotalWebSearchRequests: getTotalWebSearchRequests(),
    lastFpsAverage: fpsMetrics?.averageFps,
    lastFpsLow1Pct: fpsMetrics?.low1PctFps,
    lastModelUsage: Object.fromEntries(
      Object.entries(getModelUsage()).map(([model, usage]) => [
        model,
        {
          inputTokens: usage.inputTokens,
          outputTokens: usage.outputTokens,
          cacheReadInputTokens: usage.cacheReadInputTokens,
          cacheCreationInputTokens: usage.cacheCreationInputTokens,
          webSearchRequests: usage.webSearchRequests,
          costUSD: usage.costUSD,
        },
      ]),
    ),
    lastSessionId: getSessionId(),
  }))
}

function formatCost(cost: number, maxDecimalPlaces: number = 4): string {
  return `$${cost > 0.5 ? round(cost, 100).toFixed(2) : cost.toFixed(maxDecimalPlaces)}`