pr-base (internal)

Get a work branch based on an up-to-date remote default branch — without ever pushing to that default branch.

Not a slash command

This is an internal procedure (plugin/prompts/pr-base.md), not something you invoke. Both /rhiza:init and /rhiza:update read and follow it, which is why they behave identically here.

The rule it exists to enforce

The default branch is never pushed to — not for a seed commit, not to bring it into being on a brand-new repo. A protected default must stay untouched, and a repo's first commit belongs to its owner. So when origin/<default> doesn't exist yet, the procedure asks you to create the repository initialised with an empty README, and stops the calling command if you don't. It will not push one itself.

What it does

1. Determines the default branch — gh repo view --json defaultBranchRef or git remote show origin, falling back to main.
2. Makes origin/<default> resolve — a plain git fetch when it already exists; otherwise it asks you to create the repo with --add-readme (or the GitLab equivalent), wires up the remote, fetches, and re-reads the default. If it still doesn't resolve, the calling command stops.
3. Creates the work branch off origin/<default> — rhiza_init_<date> for /init, rhiza_<target> for /update, with a time suffix if the name is taken. Uncommitted work that predates the command is left strictly alone: never stashed, never discarded.

Reference

Source	plugin/prompts/pr-base.md
Invocation	not a slash command — reached with Read, never invoked
Read by	/rhiza:init, /rhiza:release, /rhiza:update