Git Branch Mixer

ggmx (git mix) configures named sets of branches to merge together. ggmxd (git mixdown) executes a mixdown — resetting a target branch to a base and merging all the other branches in.

The typical use case is testing a combination of feature/bugfix branches together via a throw-away temporary working branch.

Critical rule: mixdown target branches (especially working) are local throw-away integration branches. Never push a mixdown target branch, create a PR from it, or otherwise publish it unless the user explicitly asks for that exact action. Independent source branches may be pushed as needed, but the mixed working branch stays local by default.