Trim copilot PR review instructions (#26240)

* Trim copilot PR review instructions

* Remove  unactionable and subjective rules
* Limit review to keyboards only
* Defer advance code review to collaborators

* Improve non-pristine default keymap message

* Clarify info.json rules for PR review

* Narrow applyTo scope to keyboards/**

.github/copilot-instructions.md

@@ -1,11 +1,13 @@
 ---
-applyTo: "**"
+applyTo: "keyboards/**"
 excludeAgent:
   - "coding-agent"
 ---
 # GitHub Copilot Instructions for QMK Pull Request Review
 This document provides automated review guidance based on the [QMK PR Checklist](https://docs.qmk.fm/pr_checklist) and it is intended only for use by GitHub Copilot code-review agent during pull request reviews.
 
+> **Scope**: This review applies **only to changes within the `keyboards/` folder**. Changes outside `keyboards/` (e.g., core code, quantum, platforms, drivers) must be flagged and deferred to a QMK Collaborator — do not review them.
+
 ## General PR Requirements
 
 ### Branch and Submission Standards
@@ -41,37 +43,20 @@ This document provides automated review guidance based on the [QMK PR Checklist]
 - **Exception**: Simple assignment-only `rules.mk` files don't need headers
 - **Flag**: Missing or ambiguous license headers (blocks merge)
 
-### QMK Best Practices
-- **Include Guards**: Use `#pragma once` instead of `#ifndef` guards in headers
-- **Abstractions Required**: No low-level GPIO/I2C/SPI functions
-  - Must use QMK abstractions (flag direct hardware access)
-- **Timing Functions**:
-  - Use `wait_ms()` instead of `_delay_ms()`
-  - Remove `#include <util/delay.h>`
-  - Use `timer_read()`, `timer_read32()` from `timer.h`
-- **New Abstractions**: If proposing new abstraction, suggest:
-  1. Prototype in own keyboard first
-  2. Discuss with QMK Collaborators on Discord
-  3. Refactor as separate core change
-  4. Remove the keyboard-specific implementation from board
-
 ---
 
 ## Keymap PR Reviews
 
 **Scope**: These rules apply to files within `keyboards/*/keymaps/*` subdirectories.
 
-### Note on Personal Keymaps
-- **Policy Change**: Personal keymap submissions no longer accepted
-- **Permitted**: Vendor-specific keymaps only
-  - Naming convention: `default_${vendor}` (e.g., `default_clueboard`)
-  - Can be more feature-rich than stock `default` keymaps
+### Note on Non-Default Keymaps
+- Any keymap folder named something other than `default` (e.g., `default_clueboard`, `via`) is a non-default keymap
+- **Do not review the content** of non-default keymaps — flag their presence and note that a QMK Collaborator must review them
 
 ### Keymap Code Standards
 - **Includes**: `#include QMK_KEYBOARD_H` preferred over specific board files
-- **Enums**: Prefer layer enums to `#define`s
+- **Enums**: Suggest using layer enums instead of `#define`s for layers (soft suggestion only)
 - **Custom Keycodes**: First entry must be `QK_USER`
-- **Formatting**: Check spacing alignment on commas and keycodes (spaces, not tabs)
 - **VIA**: Keymaps should NOT enable VIA
   - VIA keymaps belong in [VIA QMK Userspace](https://github.com/the-via/qmk_userspace_via)
 
@@ -96,245 +81,70 @@ This document provides automated review guidance based on the [QMK PR Checklist]
 - **Data Driven Migration**: Must target `develop`
 
 ### info.json and keyboard.json Requirements
-- **Data-Driven Configuration**: Encourage maximum use of `info.json` and `keyboard.json` schema features
-- **Schema Validation**: All `info.json` and `keyboard.json` files must validate against `data/schemas/keyboard.jsonschema`
-  - Use QMK CLI: `qmk lint -kb <keyboard_name>` to validate
-  - Schema defines required fields, data types, and valid values
-  - Check for schema validation errors before submitting PR
+- **Schema Validation**: Verify that `info.json` and `keyboard.json` files are valid JSON (no syntax errors, no trailing commas, properly closed brackets)
 - **Mandatory Elements**:
-  - Valid URL
-  - Valid maintainer
-  - Valid USB VID/PID and device version
-  - Displays correctly in Configurator (Ctrl+Shift+I to preview)
-  - `layout` definitions include matrix positions
-  - Standard layout definitions where applicable
-  - Community Layout macro names when applicable
+  - `url` field is present and begins with `http://` or `https://`
+  - `maintainer` field is present and non-empty
+  - `usb.vid` and `usb.pid` fields are present and match the `0x` hexadecimal format (e.g. `"vid": "0x1234"`, `"pid": "0xFEED"`)
+  - `usb.device_version` field is present
+  - Each key entry in every `layout` array must include a `"matrix"` property (e.g. `{"label": "L01", "matrix": [0, 0], "x": 0, "y": 0}`)
   - Microcontroller and bootloader specified
   - Diode direction (if not using direct pins)
 - **Layout Naming**:
-  - Single layout: Use `LAYOUT` or community layout name
-  - Multiple layouts: Include `LAYOUT_all` + alternate names
-  - Prefer community layout names (e.g., `LAYOUT_tkl_ansi`, `LAYOUT_ortho_4x4`)
-- **Configuration in info.json or keyboard.json** (when applicable):
-  - Direct pin configuration
-  - Backlight, Split keyboard, Encoder, Bootmagic configs
-  - LED Indicator, RGB Light, RGB Matrix configs
-- **Format**: Run `qmk format-json -i` before submitting
-
-### USB VID/PID Uniqueness
-VID+PID combination must be unique across all keyboards. Individual VID or PID values can be reused with different partners.
-**Validation Steps:**
-1. Extract VID and PID from keyboard.json/info.json in the PR
-2. Search for existing usage: `grep -r '"vid".*"0xVVVV"' keyboards/ --include="*.json" | grep -l '"pid".*"0xPPPP"'`
-3. If results found: Check if BOTH VID AND PID match in same file
-   - Both match = **COLLISION** - request different PID
-   - Only one matches = **OK** - different keyboards can share individual values
-4. For keyboard variants/revisions under same keyboard folder:
-   - Different PID recommended for functionally different variants
-   - Same PID acceptable if revisions only differ in hardware routing/pin assignments
-**Quick Reference:**
-- Same PID + Different VID = Valid
-- Same VID + Different PID = Valid
-- Same VID + Same PID = Invalid
-**Review Response:**
-For collision:
-```
-VID+PID collision: 0xVVVV:0xPPPP already used by keyboards/[path]/file.json
-+Please assign a different PID. VID can remain the same.
-```
-For uniqueness confirmed:
-```
-VID+PID validation: 0xVVVV:0xPPPP is unique (no collisions found)
-```
+  - Single layout: Must be named `LAYOUT` or match `LAYOUT_*` pattern
+  - Multiple layouts: Must include `LAYOUT_all` plus at least one alternate name
 
 ### readme.md Requirements
 - **Template**: Must follow [official template](https://github.com/qmk/qmk_firmware/blob/master/data/templates/keyboard/readme.md)
 - **Flash Command**: Present with `:flash` at end
 - **Hardware Link**: Valid availability link (unless handwired)
   - Private groupbuys acceptable
-  - One-off prototypes will be questioned
   - Open-source should link to files
-- **Reset Instructions**: Clear bootloader mode instructions
-- **Images Required**:
-  - Keyboard and PCB photos preferred
-  - Must be hosted externally (imgur, etc.)
-  - Direct image links required (not preview pages)
-  - Example: `https://i.imgur.com/vqgE7Ok.jpg` not `https://imgur.com/vqgE7Ok`
+- **Reset Instructions**: Bootloader reset instructions must be present (non-empty)
+- **Images**: A keyboard image is preferred but not mandatory
+  - If present, images must not be hosted in the repository
+  - If an imgur URL is used, it must link directly to the image (i.e. `https://i.imgur.com/<id>.<ext>`), not the preview page (i.e. not `https://imgur.com/<id>`)
 
 ### rules.mk Standards
 - **Removed Items**:
-  - `MIDI_ENABLE`, `FAUXCLICKY_ENABLE`, `HD44780_ENABLE`
   - Size comments like `(-/+size)`
-  - Alternate bootloader lists if one specified
-  - MCU parameter re-definitions matching defaults in `mcu_selection.mk`
-- **Comment Updates**: Change bootloader comments to generic
-- **Forbidden Features at Keyboard Level** (these belong in keymap-level `rules.mk` only):
-  - `COMBO_ENABLE`
-  - `ENCODER_MAP_ENABLE`
 
 ### config.h Standards (Keyboard Level)
 - **Prohibited**:
   - `#define DESCRIPTION`
-  - Magic Key Options, MIDI Options, HD44780 configuration
-  - User preference `#define`s (belong in keymap)
-  - Re-defining default values (`DEBOUNCE`, RGB settings)
-  - Copy/pasted comment blocks explaining features
+  - Comment blocks explaining features
   - Commented-out unused defines
   - `#include "config_common.h"`
-  - `#define MATRIX_ROWS/COLS` (unless custom matrix)
-- **Minimal Code**: Only critical board boot code required
 - **No Vial**: Vial-related files/changes not accepted
 
 ### Keyboard Implementation Files
 
 #### `<keyboard>.c`
-- **Remove Empty Functions**: Delete empty or commented-out weak-defined functions
-  - `xxxx_xxxx_kb()`, `xxxx_xxxx_user()` implementations
-- **Migration**: `matrix_init_board()` → `keyboard_pre_init_kb()`
-- **Custom Matrix**: Use `lite` variant when possible for standard debounce
-  - `CUSTOM_MATRIX = lite` preferred
-  - Full custom matrix (`yes`) requires justification
-- **LED Indicators**: Prefer Configuration Options over custom `led_update_*()` implementations
-- **Hardware Configuration**: Basic functionality for OLED, encoders, etc. at keyboard level
+- **Advanced Code Flag**: ⚠️ If a `<keyboard>.c` file is present in the PR, flag it as possible advanced code requiring QMK Collaborator review
 
 #### `<keyboard>.h`
 - **Include**: `#include "quantum.h"` at top
-- **Layout Macros**: Move to `info.json` or `keyboard.json` (no longer in header)
+- **Layout Macros**: If `LAYOUT` macros are present, suggest moving them to `info.json` or `keyboard.json`
 
 ### Default Keymap Standards
 
 **Scope**: These rules specifically apply to files within `keyboards/*/keymaps/default/` directories.
 
 - **Pristine Requirement**: Bare minimum clean slate
-  - No custom keycodes
-  - No advanced features (non-exhaustive list of examples: tap dance, macros)
-  - Basic mod taps and home row mods acceptable when necessary
-  - Standard layouts preferred -- see examples in `layouts/default/` and `layouts/community/`
+  - ⚠️ If `keymap.c` contains anything beyond the `keymaps[]` array, or if the `default` keymap folder contains additional `.c` or `.h` files, flag this as possible advanced code requiring QMK Collaborator review
 - **Removed Examples**: Delete `QMKBEST`/`QMKURL` macros
 - **Tri Layer**: Use Tri Layer feature instead of manual `layer_on/off()` + `update_tri_layer()`
 - **Encoder Map**: Use encoder map feature, `encoder_update_user()` may not be present
 - **No VIA**: Default keymap should not enable VIA
-- **Additional Keymaps**: Example/bells-and-whistles keymaps acceptable in same PR (separate from default)
 
 ### Prohibited Files
 - **No VIA JSON**: Belongs in [VIA Keyboard Repo](https://github.com/the-via/keyboards)
 - **No KLE JSON**: Not used within QMK
+- **Single Keyboard Per PR**: A PR must not modify more than one `keyboards/<folder>/` directory
+  - Flag PRs that touch multiple top-level keyboard folders (e.g., both `keyboards/mykeyboard1/` and `keyboards/mykeyboard2/`) — each keyboard must be a separate PR
 - **No Cross-Keyboard Sources**: Don't include files from other keyboard vendors
   - Exception: Core files (e.g., `drivers/sensors/pmw3360.c`)
   - Use of vendor-specific code (e.g., `wilba_tech/wt_main.c`) only when keyboard exists in the same enclosing vendor folder (e.g. a `wilba_tech` keyboard)
-  - Multi-board code is candidate for core refactoring when intended for use by multiple vendors
-
-### Wireless Keyboards
-- **Policy**: Wireless/Bluetooth PRs rejected without complete wireless code
-  - Wireless code may not include anything resembling precompiled data such as `*.a` files or other libraries
-  - Firmware blobs are not permitted in raw form or as compiled C-style arrays either.
-  - GPL2+ license requires full source disclosure
-  - Historically abused for VIA compatibility without releasing sources
-  - PRs without wireless capability will be held indefinitely
-  - Existing merged wireless boards from same vendor held until sources provided
-
-### ChibiOS-Specific Requirements
-- **Board Definitions**: Strong preference for existing ChibiOS board definitions
-  - Use equivalent Nucleo boards when possible
-  - Example: STM32L082KZ can use `BOARD = ST_NUCLEO64_L073RZ`
-  - QMK is eliminating custom board definitions due to maintenance burden
-- **New Board Definitions**:
-  - Must NOT be embedded in keyboard PR
-  - Submit as separate Core PR
-  - `board.c` must have standard `__early_init()` and empty `boardInit()`
-  	- Migrate code intended for `__early_init()` → keyboard-local `early_hardware_init_pre/post()`
-    - Migrate code intended for `boardInit()` → keyboard-local `board_init()`
-
----
-
-## Core PR Reviews
-
-### Targeting and Scope
-- **Branch**: All core PRs must target `develop` branch
-- **Single Focus**: Smallest set of changes per PR
-  - PRs with multiple areas will be asked to split
-  - Keyboard/keymap changes only if affecting base builds or default-like keymaps
-  - Keymap modifications (non-default) should be followup PR after core merge
-  - Large refactoring PRs affecting other keymaps raised separately
-
-### Testing Requirements
-- **New Hardware Support**: Requires test keyboard under `keyboards/handwired/onekey`
-  - New MCUs: Add child keyboard targeting new MCU for build verification
-  - New hardware (displays, matrix, peripherals): Provide associated keymap
-  - Exception: If existing keymap can leverage functionality (consult Collaborators)
-- **Callbacks**: New `_kb`/`_user` callbacks must return `bool` for user override
-- **Unit Tests**: Strongly recommended, may be required
-  - Critical code areas (keycode pipeline) will require tests
-  - Boost confidence in current and future correctness
-
-### Code Quality
-- **Subjective Review**: Other requirements at QMK Collaborators' discretion
-- **Documentation**: Core changes should be well-documented
-
----
-
-## Automated Review Checklist
-
-When reviewing PRs, check the following systematically:
-
-### File Changes Review
-1. **License headers** on all C/H files (GPL2+ preferred, others must be GPL2+ compatible, SPDX format preferred)
-2. **File naming** lowercase (flag exceptions needing justification)
-3. **Include guards** use `#pragma once`
-4. **No low-level hardware access** (GPIO, I2C, SPI direct register writes)
-5. **Timing abstractions** (`wait_ms()`, `timer_read()` usage)
-
-### info.json and keyboard.json Validation
-1. **Schema Compliance**: `keyboard.json` and `info.json` files validate against `data/schemas/keyboard.jsonschema`
-  - Both files are identical syntax, however the `keyboard.json` dictates a buildable target, `info.json` does not
-   - Run `qmk lint -kb <keyboard>` to check schema validation
-   - Check for proper data types (strings, integers, arrays, objects)
-   - Verify required fields are present
-   - Ensure enum values match allowed options in schema
-2. All mandatory fields present and valid
-3. `qmk format-json -i` has been run (formats and validates)
-4. Layout macros moved from headers
-5. Community layout names used where applicable
-
-### rules.mk Cleanup
-1. Deprecated features removed
-2. No size comments
-3. No keymap-only features at keyboard level
-4. No redundant MCU parameter definitions
-
-### config.h Cleanup
-1. No `DESCRIPTION`, `config_common.h`, or prohibited includes
-2. No default value re-definitions
-3. No commented-out defines or feature documentation blocks
-4. No user preference defines at keyboard level
-
-### Keymap Quality
-1. Default keymaps are pristine (no custom keycodes/advanced features)
-2. No `QMKBEST`/`QMKURL` macros
-3. Encoder map feature used instead of `encoder_update_user()`
-4. Tri Layer feature used for multi-layer access
-5. No VIA enabled in default keymap
-
-### Documentation
-1. readme.md follows template
-2. Flash command present with `:flash`
-3. Reset instructions clear
-4. External image hosting (direct links)
-5. Valid hardware availability link
-
-### Code Organization
-1. Empty weak-defined functions removed from `<keyboard>.c`
-2. Proper migration of init functions
-3. No cross-vendor source files
-4. No VIA/KLE JSON files
-
-### Branch and Scope
-1. Not submitted from submitter's own `master` branch (use feature branches)
-2. PR is focused on single change
-3. Targets correct branch:
-   - `master` for new keyboard additions
-   - `develop` for keyboard updates/refactors/moves and core changes
-4. No merge conflicts
 
 ---
 
@@ -352,7 +162,6 @@ See: [Best Practices: Your Fork's Master](https://docs.qmk.fm/newbs_git_using_yo
 ❌ This PR targets the wrong branch:
 - **New keyboard additions** should target `master`
 - **Keyboard updates/refactors/moves** should target `develop`
-- **Core changes** should target `develop`
 
 Please change the target branch accordingly.
 ```
@@ -380,7 +189,7 @@ Exception: Only valid if from upstream sources (LUFA, ChibiOS) or justified by c
 ### For config.h violations:
 ```
 ⚠️ Found prohibited config.h elements:
-- [list specific issues: DESCRIPTION, default value re-definitions, etc.]
+- [list specific issues: `#define DESCRIPTION`, `#include "config_common.h"`, comment blocks, commented-out defines]
 
 Please remove these and refer to [Data Driven Configuration](https://docs.qmk.fm/data_driven_config).
 ```
@@ -393,31 +202,34 @@ Please remove these and refer to [Data Driven Configuration](https://docs.qmk.fm
 - Validate with: \`qmk lint -kb <keyboard_name>\`
 ```
 
-### For schema validation errors:
+### For non-pristine default keymap:
 ```
-❌ Schema validation failed for info.json or keyboard.json:
-- [list specific validation errors from schema]
-- Check `data/schemas/keyboard.jsonschema` for valid field definitions
-- Common issues:
-  - Invalid data types (e.g., string instead of integer)
-  - Missing required fields
-  - Invalid enum values
-  - Incorrectly formatted pin definitions
+⚠️ Default keymap requires collaborator review:
+The default `keymap.c` contains code beyond the `keymaps[]` array. The following was detected:
+- [describe: extra functions/definitions in keymap.c, or additional .c/.h files in the default keymap folder]
+
+A QMK Collaborator must review this before merging.
 ```
 
-### For non-pristine default keymap:
+### For non-default keymaps:
+```
+⚠️ Non-default keymap detected: `keyboards/[path]/keymaps/[name]/`
+
+This keymap requires a QMK Collaborator to review its content. No automated review of its code was performed.
+```
+
+### For `<keyboard>.c` detected:
 ```
-⚠️ Default keymap should be pristine (clean slate for users):
-- Remove: [custom keycodes/tap dance/macros/etc.]
-- Keep it minimal with standard layouts where possible
+⚠️ `<keyboard>.c` file detected: `keyboards/[path]/[keyboard].c`
 
-Consider moving advanced features to a separate example keymap.
+This file may contain advanced hardware configuration. A QMK Collaborator must review this before merging.
 ```
 
 ---
 
-## Notes for GitHub Copilot
+## Constraints and Conduct
 
+- **Scope**: Only review changes within the `keyboards/` folder. Flag any changes outside `keyboards/` and defer to a QMK Collaborator without reviewing them.
 - Focus reviews on **objective checklist items** that can be automatically verified
 - Flag **definite violations** with ❌
 - Suggest improvements for **recommendations** with ⚠️
@@ -425,6 +237,7 @@ Consider moving advanced features to a separate example keymap.
 - **Link to relevant QMK documentation** for each issue
 - **Prioritize blocking issues** (license, merge conflicts, branch policy)
 - **Be constructive**: Suggest fixes, not just problems
-- **Acknowledge trade-offs**: Some guidelines have valid exceptions
+- **Do not review non-default keymaps** — flag their presence and defer to a QMK Collaborator
+- **Do not review `<keyboard>.c` content in detail** — flag its presence and defer to a QMK Collaborator
 
 This is meant as a **first-pass review** to catch common issues before human review. Complex architectural decisions, code quality, and subjective assessments still require human QMK Collaborator review.