What should I know before I start to develop my own slicer

Solved I need immediate help with this assignment below.

GUIDE: Resuming a failed 3D print — CNC Kitchen

G-code Generated for (a) Filament extrusion and (b) Pellet extrusion

How to prevent overhangs printing first? – PrusaSlicer – Prusa3D Forum

Cura 4.8 stop at height was doing wild retraction, got it fixed, more in comments : r/3Dprinting

too much retraction at beginning - Improve your 3D prints - UltiMaker Community of 3D Printing Experts

SUNLU 3D Printer Electronic Bed Leveling Tool, 4 Batteries, 3D Printer Bed Leveling Sensor Kit for FDM Printer, Precise Leveling, Efficiency 3D Printer Accessories, 3D Printing Leveler, 2 Packs Black: : Industrial

Continuing a failed 3D print on a Tevo Tarantula

Using OctoPrint without a bed sensor —

Extra Retraction at Start - UltiMaker Cura - UltiMaker Community