As best I can tell Goyal started adding AI-related code to Calibre back in August, merging the LLM tab work from https://github.com/kovidgoyal/calibre/pull/2838

As best I can tell Goyal started adding AI-related code to Calibre back in August, merging the LLM tab work from https://github.com/kovidgoyal/calibre/pull/2838 https://github.com/kovidgoyal/calibre/pull/2838, and created the chat widget in November with commit 41d0da4267dc6f7f7e48fb9bb7e8609a2e251cb7. I looked at forking the project myself: the challenges are that it's a very quirky application, its design and implementation doesn't share conventions with any other application, and the build system is complex and unique to Calibre. It's a shame there's no good open source ebook library application with a more conventional design. Shoving AI into everything, even when it defaults to "off" (for now), is getting old.