New MCP tool `export_odb` wrapping `kicad-cli pcb export odb`: precision, compression mode (zip/tgz/none), and units. Single ODB++ job archive for CAM/MES/assembly. Self-contained interface handler reading the saved .kicad_pcb. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>