rusEfi firmware development model is "stable master". We do not have release branches, we only have master with continuous integration and limited automated testing.
By default, each Pull Request is expected to be complete and expected to not break existing functionality. If a Pull Request is a work-in-progress or draft or not intended for merge yet, it should be clearly marked with "[WIP]" prefix in the title.
Pull Requests which are not complete, not marked WIP or fail gate check should be closed to reduce a chance of confusion. It is usually helpful to discuss proposed changes prior to Pull Requests - we have Slack to collaborate and coordinate so let's use!
TODO: we have an urgent need to make gate check more reliable & expand what's included into gate check
The primary hardware platform for rusEfi is stm32f4 - as of November 2019, only stm32f4 has hardware test continuous integration.
See also Functional tests CI info