truncateSessionMemoryForCompact function

TruncationResult truncateSessionMemoryForCompact(String content)

Truncate session memory sections that exceed the per-section token limit. Used when inserting session memory into compact messages.

Implementation

TruncationResult truncateSessionMemoryForCompact(String content) {
  final lines = content.split('\n');
  final maxCharsPerSection = _maxSectionLength * 4;
  final outputLines = <String>[];
  final currentSectionLines = <String>[];
  var currentSectionHeader = '';
  var wasTruncated = false;

  for (final line in lines) {
    if (line.startsWith('# ')) {
      final result = _flushSessionSection(
        currentSectionHeader,
        currentSectionLines,
        maxCharsPerSection,
      );
      outputLines.addAll(result.lines);
      wasTruncated = wasTruncated || result.wasTruncated;
      currentSectionHeader = line;
      currentSectionLines.clear();
    } else {
      currentSectionLines.add(line);
    }
  }

  // Flush the last section.
  final result = _flushSessionSection(
    currentSectionHeader,
    currentSectionLines,
    maxCharsPerSection,
  );
  outputLines.addAll(result.lines);
  wasTruncated = wasTruncated || result.wasTruncated;

  return TruncationResult(
    truncatedContent: outputLines.join('\n'),
    wasTruncated: wasTruncated,
  );
}