Why Investigate the motivation and intent behind code. The companion skill answers what the code does and how it works. answers what forces led to its shape. Each spawn below names a role line in the pstack settings file ( in Cursor, in Claude Code, in other harnesses) and a default. Set to that line's value, or to the default if the file or the line is missing. Leave unset when the value is or . If your subagent tool rejects a slug, use the default and say so. If it rejects the default, use the closest valid slug of the same family from its error message or your harness's model list. Pick ea…