Function firstRunes

agentContext/builder.go:574–583

(text string, limit int)

			if len([]rune(current)) > budget.MaxChars {
				return firstRunes(current, budget.MaxChars), true
			}
			for _, chunk := range chunks[1:] {
				piece := *preserveSeparator + chunk
				if len([]rune(current+piece)) > budget.MaxChars {
					return current, true
				}
				current += piece
			}
			return current, true
		}
	}
	return firstRunes(candidate, budget.MaxChars), true
}