VCS Isolation & Workflows

VCS Isolation Rule: Any modifications to MAGI files (e.g., adding/updating personas by Training) MUST be excluded from the feature/bugfix CL. The staging and submission workflow branches dynamically based on project.magi.json#environment/vcs:

• For JJ (Jujutsu): Work in parallel sibling changes (both rooted at main@origin) from the start: one for the feature/bugfix and one for the MAGI upgrades. If they accidentally get mixed, Release MUST use jj split or jj squash -i to cleanly separate the changes before pushing.
• For GIT: Use standard git branching. Stage only product source files for the feature CL. Stage only MAGI updates for the secondary CL.