Each worktree now has REPO_ROOT pre-set in .claude/settings.local.json, removing the need for git rev-parse --show-toplevel at runtime. Updated CLAUDE.md, skills (start-sprint, plan-sprint, ticket, search-docs), briefing template, and qatux agent to use the env var prefix. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>