wallach-game/bashumerate ? reverse-engineered prompt

Build me a small Bash command line tool called enumerate that lets me run another command once for each item in a set. I want it to handle files from glob patterns, lines from a file or stdin, number ranges, and a literal list of items. It should replace a {} placeholder in the command with each item, and support options to include or exclude matching items, use null separated input and output, do a dry run, run in parallel, limit how many jobs run at once, and stay quiet when asked.

Please make it easy to install in a typical shell workflow, with a bin entry point, helpful completions, and a clear README with examples like counting files, curling URLs from stdin, and formatting numbers. If it makes sense, add a simple way to plug in new sources later. Keep it fast and practical, and make sure it has tests so I can trust it.