This issue is to make an agreement on the way manufacturers publish modifications made to satisfy requirements of the PCB manufacturers.

Some ideas:

• main development takes place in master branch
• releases are tagged
• every manufacturer has his own branch originating from the project release (e.g. v4.0.2) and publishes there its modifications
• every manufactured commit gets its own tag consisting of project release, manufacturer abbreviation and batch id, that is manufacturer specific (e.g. v4.0.2_ts_batch452 or v4.0.2_cti_batch199)
• as modifications will depend on PCB manufacturer, one may want to have several to have several batches for a single project release
• if a manufacturer's modification introduces an upgrade that is not "PCB-house specific", it can be merged to master and generate a new patch release (e.g. 4.0.3)