diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index d74fb89..9e09dc2 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -1,5 +1,454 @@
-on: [push, pull_request, workflow_dispatch]
+name: Build
+
+on:
+  push:
+    paths:
+      - ".github/workflows/build.yml"
+      - "app/**"
+  pull_request:
+    paths:
+      - ".github/workflows/build.yml"
+      - "app/**"
+  schedule:
+    - cron: "22 4 * * *"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name == 'schedule' }}
+  cancel-in-progress: true
+
+permissions: {}
 
 jobs:
   build:
-    uses: zmkfirmware/zmk/.github/workflows/build-user-config.yml@main
+    if: ${{ always() }}
+    runs-on: ubuntu-latest
+    container:
+      image: docker.io/zmkfirmware/zmk-build-arm:3.5
+    needs: compile-matrix
+    strategy:
+      matrix:
+        include: ${{ fromJSON(needs.compile-matrix.outputs.include-list) }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - name: Cache west modules
+        uses: actions/cache@v4
+        env:
+          cache-name: cache-zephyr-modules
+        with:
+          path: |
+            modules/
+            tools/
+            zephyr/
+            bootloader/
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('app/west.yml') }}
+          restore-keys: |
+            ${{ runner.os }}-build-${{ env.cache-name }}-
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
+        timeout-minutes: 2
+        continue-on-error: true
+      - name: Initialize workspace (west init)
+        run: west init -l app
+      - name: Update modules (west update)
+        run: west update
+      - name: Export Zephyr CMake package (west zephyr-export)
+        run: west zephyr-export
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "14.x"
+      - name: Install @actions/artifact
+        run: npm install @actions/artifact
+      - name: Build
+        uses: actions/github-script@v7
+        id: boards-list
+        with:
+          script: |
+            const fs = require('fs');
+
+            const execSync = require('child_process').execSync;
+
+            const buildShieldArgs = JSON.parse(`${{ matrix.shieldArgs }}`);
+
+            let error = false;
+
+            for (const shieldArgs of buildShieldArgs) {
+              try {
+                console.log(`::group::${{ matrix.board}} ${shieldArgs.shield} Build`)
+
+                const output = execSync(`west build -s app -p -b ${{ matrix.board }} -- ${shieldArgs.shield ? '-DSHIELD="' + shieldArgs.shield + '"' : ''} ${shieldArgs['cmake-args'] || ''}`);
+
+                console.log(output.toString());
+              } catch (e) {
+                console.error(`::error::Failed to build ${{ matrix.board }} ${shieldArgs.shield} ${shieldArgs['cmake-args']}`);
+                console.error(e);
+                error = true;
+              } finally {
+                console.log('::endgroup::');
+              }
+            }
+
+            if (error) {
+              throw new Error('Failed to build one or more configurations');
+            }
+      - name: Upload artifacts
+        uses: actions/github-script@v7
+        continue-on-error: ${{ github.event_name == 'pull_request' }}
+        id: boards-upload
+        with:
+          script: |
+            const fs = require('fs');
+            const {default: artifact} = require('@actions/artifact');
+
+            const buildShieldArgs = JSON.parse(`${{ matrix.shieldArgs }}`);
+
+            let error = false;
+
+            for (const shieldArgs of buildShieldArgs) {
+              try {
+                console.log(`::group::${{ matrix.board}} ${shieldArgs.shield} Upload`)
+
+                const fileExtensions = ["hex", "uf2"];
+
+                const files = fileExtensions
+                  .map(extension => "build/zephyr/zmk." + extension)
+                  .filter(path => fs.existsSync(path));
+
+                const rootDirectory = 'build/zephyr';
+                const options = {
+                    continueOnError: true
+                }
+
+                const cmakeName = shieldArgs['cmake-args'] ? '-' + (shieldArgs.nickname || shieldArgs['cmake-args'].split(' ').join('')) : '';
+                const artifactName = `${{ matrix.board }}${shieldArgs.shield ? '-' + shieldArgs.shield : ''}${cmakeName}-zmk`;
+
+                await artifact.uploadArtifact(artifactName, files, rootDirectory, options);
+              } catch (e) {
+                console.error(`::error::Failed to upload ${{ matrix.board }} ${shieldArgs.shield} ${shieldArgs['cmake-args']}`);
+                console.error(e);
+                error = true;
+              } finally {
+                console.log('::endgroup::');
+              }
+            }
+
+            if (error) {
+              throw new Error('Failed to build one or more configurations');
+            }
+  compile-matrix:
+    if: ${{ !cancelled() }}
+    runs-on: ubuntu-latest
+    needs: [core-coverage, board-changes, nightly]
+    outputs:
+      include-list: ${{ steps.compile-list.outputs.result }}
+    steps:
+      - name: Join build lists
+        uses: actions/github-script@v7
+        id: compile-list
+        with:
+          script: |
+            const coreCoverage = `${{ needs.core-coverage.outputs.core-include }}` || "[]";
+            const boardChanges = `${{ needs.board-changes.outputs.boards-include }}` || "[]";
+            const nightly = `${{ needs.nightly.outputs.nightly-include }}` || "[]";
+
+            const combined = [
+              ...JSON.parse(coreCoverage),
+              ...JSON.parse(boardChanges),
+              ...JSON.parse(nightly)
+            ];
+            const combinedUnique = [...new Map(combined.map(el => [JSON.stringify(el), el])).values()];
+
+            const perBoard = {};
+
+            for (const configuration of combinedUnique) {
+              if (!perBoard[configuration.board])
+                perBoard[configuration.board] = [];
+
+              perBoard[configuration.board].push({
+                shield: configuration.shield,
+                'cmake-args': configuration['cmake-args'],
+                nickname: configuration.nickname
+              })
+            }
+
+            return Object.entries(perBoard).map(([board, shieldArgs]) => ({
+              board,
+              shieldArgs: JSON.stringify(shieldArgs),
+            }));
+  core-coverage:
+    if: ${{ needs.get-changed-files.outputs.core-changes == 'true' }}
+    runs-on: ubuntu-latest
+    needs: get-changed-files
+    outputs:
+      core-include: ${{ steps.core-list.outputs.result }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "14.x"
+      - name: Install js-yaml
+        run: npm install js-yaml
+      - uses: actions/github-script@v7
+        id: core-list
+        with:
+          script: |
+            const fs = require('fs');
+            const yaml = require('js-yaml');
+
+            const coreCoverage = yaml.load(fs.readFileSync('app/core-coverage.yml', 'utf8'));
+
+            let include = coreCoverage.board.flatMap(board =>
+              coreCoverage.shield.map(shield => ({ board, shield }))
+            );
+
+            return [...include, ...coreCoverage.include];
+  board-changes:
+    if: ${{ needs.get-changed-files.outputs.board-changes == 'true' }}
+    runs-on: ubuntu-latest
+    needs: [get-grouped-hardware, get-changed-files]
+    outputs:
+      boards-include: ${{ steps.boards-list.outputs.result }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "14.x"
+      - name: Install js-yaml
+        run: npm install js-yaml
+      - uses: actions/github-script@v7
+        id: boards-list
+        with:
+          script: |
+            const fs = require('fs');
+            const yaml = require('js-yaml');
+
+            const changedFiles = JSON.parse(`${{ needs.get-changed-files.outputs.changed-files }}`);
+            const metadata = JSON.parse(`${{ needs.get-grouped-hardware.outputs.organized-metadata }}`);
+            const boardChanges = new Set(changedFiles.filter(f => f.startsWith('app/boards')).map(f => f.split('/').slice(0, 4).join('/')));
+
+            return (await Promise.all([...boardChanges].flatMap(async bc => {
+              const globber = await glob.create(bc + "/*.zmk.yml");
+              const files = await globber.glob();
+
+              const aggregated = files.flatMap((f) =>
+                yaml.loadAll(fs.readFileSync(f, "utf8"))
+              );
+
+              const boardAndShield = (b, s) => {
+                if (s.siblings) {
+                  return s.siblings.map(shield => ({
+                    board: b.id,
+                    shield,
+                  }));
+                } else {
+                  return {
+                    board: b.id,
+                    shield: s.id
+                  };
+                }
+              }
+
+              return aggregated.flatMap(hm => {
+                switch (hm.type) {
+                  case "board":
+                    if (hm.features && hm.features.includes("keys")) {
+                      if (hm.siblings) {
+                        return hm.siblings.map(board => ({
+                          board,
+                        }));
+                      } else {
+                        return {
+                          board: hm.id
+                        };
+                      }
+                    } else if (hm.exposes) {
+                      return hm.exposes.flatMap(i =>
+                        metadata.interconnects[i].shields.flatMap(s => boardAndShield(hm, s))
+                      );
+                    } else {
+                      console.error("Board without keys or interconnect");
+                    }
+                    break;
+                  case "shield":
+                    if (hm.features && hm.features.includes("keys")) {
+                      return hm.requires.flatMap(i =>
+                        metadata.interconnects[i].boards.flatMap(b => boardAndShield(b, hm))
+                      );
+                    } else {
+                      console.warn("Unhandled shield without keys");
+                      return [];
+                    }
+                    break;
+                  case "interconnect":
+                    return [];
+                }
+              });
+            }))).flat();
+  nightly:
+    if: ${{ github.event_name == 'schedule' && github.repository_owner == 'zmkfirmware' }}
+    runs-on: ubuntu-latest
+    needs: get-grouped-hardware
+    outputs:
+      nightly-include: ${{ steps.nightly-list.outputs.result }}
+    steps:
+      - name: Create nightly list
+        uses: actions/github-script@v7
+        id: nightly-list
+        with:
+          script: |
+            const metadata = JSON.parse(`${{ needs.get-grouped-hardware.outputs.organized-metadata }}`);
+
+            let includeOnboard = metadata.onboard.flatMap(b => {
+              if (b.siblings) {
+                return b.siblings.map(board => ({
+                  board,
+                }));
+              } else {
+                return {
+                  board: b.id,
+                };
+              }
+            });
+
+            let includeInterconnect = Object.values(metadata.interconnects).flatMap(i =>
+              i.boards.flatMap(b =>
+                i.shields.flatMap(s => {
+                  if (s.siblings) {
+                    return s.siblings.map(shield => ({
+                      board: b.id,
+                      shield,
+                    }));
+                  } else {
+                    return {
+                      board: b.id,
+                      shield: s.id,
+                    };
+                  }
+                })
+              )
+            );
+
+            return [...includeOnboard, ...includeInterconnect];
+  get-grouped-hardware:
+    runs-on: ubuntu-latest
+    outputs:
+      organized-metadata: ${{ steps.organize-metadata.outputs.result }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "14.x"
+      - name: Install js-yaml
+        run: npm install js-yaml
+      - name: Aggregate Metadata
+        uses: actions/github-script@v7
+        id: aggregate-metadata
+        with:
+          script: |
+            const fs = require('fs');
+            const yaml = require('js-yaml');
+
+            const globber = await glob.create("app/boards/**/*.zmk.yml");
+            const files = await globber.glob();
+
+            const aggregated = files.flatMap((f) =>
+              yaml.loadAll(fs.readFileSync(f, "utf8"))
+            );
+
+            return JSON.stringify(aggregated).replace(/\\/g,"\\\\").replace(/`/g,"\\`");
+          result-encoding: string
+
+      - name: Organize Metadata
+        uses: actions/github-script@v7
+        id: organize-metadata
+        with:
+          script: |
+            const hardware = JSON.parse(`${{ steps.aggregate-metadata.outputs.result }}`);
+
+            const grouped = hardware.reduce((agg, hm) => {
+              switch (hm.type) {
+                case "board":
+                  if (hm.features && hm.features.includes("keys")) {
+                    agg.onboard.push(hm);
+                  } else if (hm.exposes) {
+                    hm.exposes.forEach((element) => {
+                      let ic = agg.interconnects[element] || {
+                        boards: [],
+                        shields: [],
+                      };
+                      ic.boards.push(hm);
+                      agg.interconnects[element] = ic;
+                    });
+                  } else {
+                    console.error("Board without keys or interconnect");
+                  }
+                  break;
+                case "shield":
+                  if (hm.features && hm.features.includes("keys")) {
+                    hm.requires.forEach((id) => {
+                      let ic = agg.interconnects[id] || { boards: [], shields: [] };
+                      ic.shields.push(hm);
+                      agg.interconnects[id] = ic;
+                    });
+                  }
+                  break;
+                case "interconnect":
+                  let ic = agg.interconnects[hm.id] || { boards: [], shields: [] };
+                  ic.interconnect = hm;
+                  agg.interconnects[hm.id] = ic;
+                  break;
+              }
+              return agg;
+            },
+            { onboard: [], interconnects: {} });
+
+            return JSON.stringify(grouped).replace(/\\/g,"\\\\").replace(/`/g,"\\`");
+          result-encoding: string
+  get-changed-files:
+    if: ${{ github.event_name != 'schedule' }}
+    runs-on: ubuntu-latest
+    outputs:
+      changed-files: ${{ steps.changed-files.outputs.all_changed_files }}
+      board-changes: ${{ steps.board-changes.outputs.result }}
+      core-changes: ${{ steps.core-changes.outputs.result }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - uses: tj-actions/changed-files@v44
+        id: changed-files
+        with:
+          json: true
+          escape_json: false
+      - uses: actions/github-script@v7
+        id: board-changes
+        with:
+          script: |
+            const changedFiles = JSON.parse(`${{ steps.changed-files.outputs.all_changed_files }}`);
+            const boardChanges = changedFiles.filter(f => f.startsWith('app/boards'));
+            return boardChanges.length ? 'true' : 'false';
+          result-encoding: string
+      - uses: actions/github-script@v7
+        id: core-changes
+        with:
+          script: |
+            const changedFiles = JSON.parse(`${{ steps.changed-files.outputs.all_changed_files }}`);
+            const boardChanges = changedFiles.filter(f => f.startsWith('app/boards'));
+            const appChanges = changedFiles.filter(f => f.startsWith('app'));
+            const ymlChanges = changedFiles.includes('.github/workflows/build.yml');
+            return boardChanges.length < appChanges.length || ymlChanges ? 'true' : 'false';
+          result-encoding: string