If you concatenate all the clues_*.txt files, in order, to a single file, you can search through it to get the number of a pattern using standard tools, e.g.
I don't want to ruin the game for the community so will hold off on saying too much. I will say this- this game is very well designed so it's pretty straightforward to understand how it works without using anything more than the network tab of chrome :). No js, frontend puppeteering, etc. are needed. I might write it up when the game is close to completion!
The empty board: https://pixelogic.app/every-5x5-nonogram#21035201
The full board: https://pixelogic.app/every-5x5-nonogram#13821100
A greeting board: https://pixelogic.app/every-5x5-nonogram#4282670
A checkerboard: https://pixelogic.app/every-5x5-nonogram#24204839
A board of love: https://pixelogic.app/every-5x5-nonogram#14090887
Question block: https://pixelogic.app/every-5x5-nonogram#18519948