Dsh Seismicx

Key features

• skillRoot unset — the plugin logs one line and registers no tools.
• Everything goes through ctx.subprocess, never node:child_process.
• polarity, associate, locate, magnitude-ml, mechanism, analyze, build-tools, init-config, and the end-to-end catalog follow the same shape as seismicx_scan
• Installing this bundle can never stop the harness from booting
• an installed-but-not-yet-pointed-at plugin is unconfigured, not broken.