Function extractAmbientContextMetrics

pkg/cli/token_usage.go:218–272

(entries []TokenUsageEntry)

}

func extractAmbientContextMetrics(entries []TokenUsageEntry) *AmbientContextMetrics {
	if len(entries) == 0 {
		return nil
	}

	type orderedTokenEntry struct {
		entry        TokenUsageEntry
		timestamp    time.Time
		hasTimestamp bool
		order        int
	}

	ordered := make([]orderedTokenEntry, 0, len(entries))
	for i, entry := range entries {
		ts, hasTimestamp := parseTokenUsageTimestamp(entry.Timestamp)
		ordered = append(ordered, orderedTokenEntry{
			entry:        entry,
			timestamp:    ts,
			hasTimestamp: hasTimestamp,
			order:        i,
		})
	}

	slices.SortStableFunc(ordered, func(left, right orderedTokenEntry) int {
		if left.hasTimestamp && right.hasTimestamp {
			switch {
			case left.timestamp.Before(right.timestamp):
				return -1
			case right.timestamp.Before(left.timestamp):
				return 1
			default:
				return 0
			}
		}
		if left.hasTimestamp != right.hasTimestamp {
			if left.hasTimestamp {
				return -1
			}
			return 1
		}
		if left.order < right.order {
			return -1
		}
		if left.order > right.order {
			return 1
		}
		return 0
	})

	firstCall := ordered[0].entry
	return &AmbientContextMetrics{
		InputTokens:  firstCall.InputTokens,
		CachedTokens: firstCall.CacheReadTokens,
	}
}

func parseTokenUsageTimestamp(value string) (time.Time, bool) {
	if value == "" {