- Vial-related files or changes will not be accepted, as they are not used by QMK firmware (no Vial-specific core code has been submitted or merged)
- `<keyboard>.c`
- empty `xxxx_xxxx_kb()` or other weak-defined default implemented functions removed
- empty `xxxx_xxxx_user()` or other user-level functions are disallowed at the keyboard level and must be moved to keymaps
- commented-out functions removed too
- `matrix_init_board()` etc. migrated to `keyboard_pre_init_kb()`, see: [keyboard_pre_init*](custom_quantum_functions.md?id=keyboard_pre_init_-function-documentation)
- prefer `CUSTOM_MATRIX = lite` if custom matrix used, allows for standard debounce, see [custom matrix 'lite'](custom_matrix.md?id=lite)
- prefer LED indicator [Configuration Options](feature_led_indicators.md?id=configuration-options) to custom `led_update_*()` implementations where possible
- Encoder support should not be hacked into the keymap here -- no `tap_code(dynamic_keymap_get_keycode())` or `action_exec()` hacks. The [Encoder Map](feature_encoders.md?id=encoder-map) feature already supports the dynamic keymap feature (what power's VIA's "live keymap updates" capability).
- If support is absolutely necessary, it should be implemented exclusively at the keymap level, with none of the implementation bleeding into the keyboard level (no empty rows/columns, no encoder specific layouts, etc.), as those configurations can be redefined at the keymap level. Keymaps can then choose to use the `action_exec` hack. <!-- because people will complain, give them a way to implement it, in the meanwhile. To be removed. -->
- [Request for official proper VIA support](https://github.com/the-via/app/issues/26)
- Encoder support should not require any keyboard-level code, and associated keymaps should now leverage the [Encoder Map](feature_encoders.md?id=encoder-map) feature instead.
- `<keyboard>.h`
- `#include "quantum.h"` appears at the top
- `LAYOUT` macros should use standard definitions if applicable
- use the Community Layout macro names where they apply (preferred above `LAYOUT`/`LAYOUT_all`)
- `LAYOUT` macros should be moved to `info.json`
- keymap `config.h`
- no duplication of `rules.mk` or `config.h` from keyboard