In the world of software development, quickly finding and fixing errors drives better experiences for both end-users and developers. One key tool in this process is the symbol map, which records debugging information that was lost in the compilation process. Symbol maps (or source maps if we're talking JavaScript) connect the code developers write to the minified code in production, making it easier to decipher crashes by pinpointing the exact source code that caused the error.
A long time ago I worked on a project called Django Debug Toolbar (DJDT). It was a local development plugin that would give you a debug overlay within Django’s development environment, helping you diagnose things like the SQL queries being made, environment configuration, and what templates were rendered. In general, it made the local dev experience much better, helping you prevent or more easily fix things like N+1 queries.