Companion to OUTPUT-INTEGRATION.md: the three input surfaces (ViGEm x360
pad, SendInput scancode keyboard/mouse, RioGamepad HID), per-button routing
kinds incl. the fixed 11-button pad order, axis calibration + routing with
the triggers-are-buttons trap and the shipped Descent pattern, per-game
strategy, profile building/triggers workflow, benchless testing, checklist.
Cross-linked from README and the output guide.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
