Function getStoredSessionCosts

src/cost-tracker.ts:87–123

(
  sessionId: string,
)

 * Use this to read costs BEFORE overwriting the config with saveCurrentSessionCosts().
 */
export function getStoredSessionCosts(
  sessionId: string,
): StoredCostState | undefined {
  const projectConfig = getCurrentProjectConfig()

  // Only return costs if this is the same session that was last saved
  if (projectConfig.lastSessionId !== sessionId) {
    return undefined
  }

  // Build model usage with context windows
  let modelUsage: { [modelName: string]: ModelUsage } | undefined
  if (projectConfig.lastModelUsage) {
    modelUsage = Object.fromEntries(
      Object.entries(projectConfig.lastModelUsage).map(([model, usage]) => [
        model,
        {
          ...usage,
          contextWindow: getContextWindowForModel(model, getSdkBetas()),
          maxOutputTokens: getModelMaxOutputTokens(model).default,
        },
      ]),
    )
  }

  return {
    totalCostUSD: projectConfig.lastCost ?? 0,
    totalAPIDuration: projectConfig.lastAPIDuration ?? 0,
    totalAPIDurationWithoutRetries:
      projectConfig.lastAPIDurationWithoutRetries ?? 0,
    totalToolDuration: projectConfig.lastToolDuration ?? 0,
    totalLinesAdded: projectConfig.lastLinesAdded ?? 0,
    totalLinesRemoved: projectConfig.lastLinesRemoved ?? 0,
    lastDuration: projectConfig.lastDuration,
    modelUsage,
  }
}

/**
 * Restores cost state from project config when resuming a session.