mainbranch: Skill for Claude Code

Update

Update the installed Main Branch CLI and skills, then refresh this business folder's Claude Code links.

Use this instead of asking the user to remember whether they installed with pipx or an old clone. The CLI owns the mechanics. Do not suggest raw package commands such as pipx upgrade mainbranch as the first update path; only use that as the bootstrap fallback when mb update is unavailable or the installed version is 0.1.x.

CLI facts first: Run mb update --repo . --json from the business folder and use its result before giving install-mode advice.

---

Step 1: Update Main Branch

Run from the business folder:

mb update --repo . --json 2>&1

Handle the JSON result:

Result	What to say
"ok": true, old_version != new_version	"Updated Main Branch and refreshed skill links."
"ok": true, old_version == new_version	"Main Branch is already up to date."
"ok": false	Show the first error and the repair copy below.
Invalid JSON	Run mb update --check --repo . yourself if possible; if not, ask the user for that output.

If the result includes warnings, show them after the main status.

---

Step 2: If Update Fails

Tell the user:

"I wasn't able to update Main Branch. This can leave you on old skills or old migration behavior.

Try these from your business repo:

mb update --check --repo .
mb doctor

If mb --version says 0.1.x, run this once first:

pipx upgrade mainbranch
```"

Do not continue as if the update worked.

---

Step 3: Restart If Skill Links Changed

If skills_relinked_count is greater than zero after an actual update, tell the user:

"Skill links were refreshed. If a slash command does not appear in Claude Code, restart Claude from this repo and run /mb-start."

Claude Code loads slash commands at session start, so a restart can be required after repairing links. In --check --json output, treat planned_skills_relink_count as a dry-run preview, not proof that links already changed.