Setup tracker

Configure how the issue skills (triage, to-prd, to-issues, pickup, morning-brief) talk to this repo's tracker. This is the per-repo tracker config the skills resolve at run time.

Process

1. Ask which tracker this repo uses: github (the default) or linear.

2. Write the preference where the skills resolve it — a tracker: line under an ## Issue tracker section in the repo's CLAUDE.md (create the section if absent):

   ## Issue tracker
   
   tracker: linear
   

3. GitHub — nothing else needed. The skills load ~/.claude/skills/triage/issue-tracker-github.md and bootstrap the canonical labels on first use.