Logged 6 hours today wrapping up my C-Shell mid-submission, focusing on fixing a major architecture bug, optimizing features, and thoroughly documenting the codebase. First, I added a stale path cleanup mechanism to my Zoxide-style hop command, ensuring that deleted directories or those with a frecency rank below 0.5 are automatically purged from the hidden database. Next, I tackled a tricky OS trap involving multiple output redirections: because execv() replaces the entire process image, it was obliterating my post-execution file-writing logic. I fixed this by building a custom tee-style pipeline that forks a second proxy “writer” child to safely read the command’s output via a pipe and distribute it to all files simultaneously. Finally, I went through all my files to rigorously comment the complex dup2 file descriptor routing and backward file-chunking logic.