package memory

import "strings"

func CompressForPrompt(messages []Message, maxChars int) string {
	if maxChars <= 0 {
		maxChars = 8000
	}

	builder := strings.Builder{}
	for _, msg := range messages {
		line := msg.Role + ": " + msg.Content + "\n"
		if builder.Len()+len(line) > maxChars {
			break
		}
		builder.WriteString(line)
	}
	return builder.String()
}