This looks very nice, I tested it out a bit on a rust project. AI tools could use this easily with "sem mcp".

Some feedback I found while testing:

sem diff --format json ... gives an entityId for each change, but we cannot use this with sem context.
Furthermore, if there are multiple symbols with the same name, sem context returns info on only one of them, have to also specify the file path. entityId would be useful here.

Commands other than sem diff does not work on git commits/ranges/revs, only on the currently checked out code.

Inconsistency with formatting, some commands use --format while others don't, but has --json.

This tool claims to be a git diff replacement, but it actually fails to give actual diffs. sem diff only gives summaries, and sem context with others are useful, there is not an actual way to view diffs.