Setup pstack On Codex, read the platform mapping, including its per-skill notes, before following this skill. On GitHub Copilot, read the platform mapping, including its per-skill notes, before following this skill. On Muse, read the platform mapping, including its per-skill notes, before following this skill. On GitHub Copilot, follow the Copilot setup in place of steps 1, 3, 4, and 7 and step 6's header. On another runtime, read Other runtimes below for where the sheet lives and how it loads; the steps are the same. Write the current runtime's per-role model override sheet, using the path i…