“Anything contained within a directory named bitwarden_license is covered solely by the BITWARDEN SOFTWARE DEVELOPMENT KIT LICENSE.”
Bitwarden’s internal SDK now ships under a choice of GPL v3.0 or its own SDK license. The license it replaces said you may not use the SDK to develop applications for software other than Bitwarden. The commit message files a license change under “Improve licensing language.” Anything in the bitwarden_license directory stays proprietary, so the fine print still wins.