Adds tests to prevent regression of polecat identity bugs:
1. TestInstallCLAUDETemplate: Verifies template is loaded from
mayor/rig/templates/ (not rig root) with correct variable substitution.
2. TestInstallCLAUDETemplateNotAtRigRoot: Verifies templates at the
old buggy location (rig root) are NOT used.
3. TestPolecatCommandFormat: Documents and verifies that polecat sessions
export GT_ROLE=polecat, GT_RIG, GT_POLECAT, BD_ACTOR inline before
starting Claude (because tmux SetEnvironment only affects new panes).
These tests ensure polecats correctly identify as polecats, not mayor.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>