feat: cv2

2026-01-14 05:52:50 +00:00 · 2026-01-09 21:36:35 +01:00 · 2026-01-09 21:33:41 +01:00 · 2026-01-09 14:42:33 +01:00 · 2025-12-18 16:29:30 +01:00 · 2025-12-18 15:35:33 +01:00
136 changed files with 8719 additions and 4145 deletions
--- a/.prettierrc
+++ b/.prettierrc
@@ -1,4 +1,4 @@
 {
-  "plugins": ["prettier-plugin-svelte"],
+  "plugins": ["prettier-plugin-svelte", "prettier-plugin-css-order"],
  "overrides": [{ "files": "*.svelte", "options": { "parser": "svelte" } }]
 }
--- a/.stylelintrc.json
+++ b/.stylelintrc.json
@@ -3,7 +3,6 @@
    "stylelint-config-standard-scss",
    "stylelint-config-recommended-scss",
    "stylelint-config-html/svelte",
-    "stylelint-config-clean-order",
    "stylelint-config-prettier-scss"
  ],
  "rules": {
--- a/icons.config.js
+++ b/icons.config.js
@@ -34,6 +34,7 @@ const config = {
    "abc",
    "function",
    "cloud_done",
+    "counter_4",
    "backup",
    "cloud_download",
    "cloud_off",
@@ -43,9 +44,14 @@ const config = {
    "arrow_back",
    "arrow_back_ios_new",
    "save",
+    "step_over",
+    "step_into",
+    "step_out",
+    "timer_play",
    "settings_backup_restore",
    "sound_detection_loud_sound",
    "ring_volume",
+    "skillet",
    "wifi",
    "power_settings_circle",
    "graphic_eq",
@@ -72,9 +78,13 @@ const config = {
    "light_mode",
    "palette",
    "translate",
+    "smart_toy",
+    "visibility_off",
    "play_arrow",
    "extension",
    "upload_file",
+    "file_export",
+    "file_save",
    "commit",
    "bug_report",
    "delete",
@@ -86,6 +96,7 @@ const config = {
    "undo",
    "redo",
    "replay",
+    "clock_loader_80",
    "reply",
    "navigate_before",
    "navigate_next",
@@ -136,15 +147,29 @@ const config = {
    "developer_board",
    "developer_board_off",
    "memory",
+    "gamepad_circle_up",
+    "gamepad_circle_left",
+    "gamepad_circle_down",
+    "gamepad_circle_right",
+    "trail_length_medium",
+    "blur_short",
+    "combine_columns",
+    "animation",
+    "text_select_move_back_word",
  ],
  codePoints: {
    speed: "e9e4",
    arrow_split: "e985",
    arrow_circle_down: "f181",
    arrow_circle_up: "f182",
+    gamepad_circle_up: "eecd",
+    gamepad_circle_right: "eece",
+    gamepad_circle_left: "eecf",
+    gamepad_circle_down: "eed0",
    counter_1: "f784",
    counter_2: "f783",
    counter_3: "f782",
+    counter_4: "f781",
    ios_share: "e6b8",
    light_mode: "e518",
    upload_file: "e9fc",
@@ -157,6 +182,8 @@ const config = {
    routine: "e20c",
    experiment: "e686",
    dictionary: "f539",
+    visibility_off: "e8f5",
+    file_save: "f17f",
  },
 };

--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
  "name": "charachorder-device-manager",
-  "version": "2.3.0",
+  "version": "2.6.0",
  "license": "AGPL-3.0-or-later",
  "private": true,
  "engines": {
@@ -34,63 +34,73 @@
    "typesafe-i18n": "typesafe-i18n"
  },
  "devDependencies": {
-    "@codemirror/autocomplete": "^6.18.6",
-    "@codemirror/commands": "^6.8.1",
-    "@codemirror/lang-javascript": "^6.2.3",
-    "@codemirror/language": "^6.11.0",
-    "@codemirror/state": "^6.5.2",
-    "@codemirror/view": "^6.36.5",
-    "@fontsource-variable/material-symbols-rounded": "^5.2.8",
-    "@fontsource-variable/noto-sans-mono": "^5.2.6",
-    "@lezer/highlight": "^1.2.1",
+    "@codemirror/autocomplete": "^6.20.0",
+    "@codemirror/collab": "^6.1.1",
+    "@codemirror/commands": "^6.10.1",
+    "@codemirror/lang-javascript": "^6.2.4",
+    "@codemirror/language": "^6.12.1",
+    "@codemirror/lint": "^6.9.2",
+    "@codemirror/merge": "^6.11.2",
+    "@codemirror/state": "^6.5.3",
+    "@codemirror/view": "^6.39.9",
+    "@fontsource-variable/material-symbols-rounded": "^5.2.30",
+    "@fontsource-variable/noto-sans-mono": "^5.2.10",
+    "@lezer/common": "^1.5.0",
+    "@lezer/generator": "^1.8.0",
+    "@lezer/highlight": "^1.2.3",
+    "@lezer/lr": "^1.4.7",
    "@material/material-color-utilities": "^0.3.0",
    "@melt-ui/pp": "^0.3.2",
    "@melt-ui/svelte": "^0.86.6",
    "@modyfi/vite-plugin-yaml": "^1.1.1",
-    "@sveltejs/adapter-static": "^3.0.8",
-    "@sveltejs/kit": "^2.20.2",
-    "@sveltejs/vite-plugin-svelte": "^5.0.3",
+    "@sveltejs/adapter-static": "^3.0.10",
+    "@sveltejs/kit": "^2.49.3",
+    "@sveltejs/vite-plugin-svelte": "^6.2.3",
    "@tauri-apps/api": "^1.6.0",
    "@tauri-apps/cli": "^1.6.0",
    "@types/dom-view-transitions": "^1.0.6",
+    "@types/js-yaml": "^4.0.9",
+    "@types/semver": "^7.7.1",
    "@types/w3c-web-serial": "^1.0.8",
-    "@types/w3c-web-usb": "^1.0.10",
-    "@types/wicg-file-system-access": "^2023.10.5",
-    "@vite-pwa/sveltekit": "^1.0.0",
-    "autoprefixer": "^10.4.21",
-    "codemirror": "^6.0.1",
-    "cypress": "^14.2.1",
+    "@types/w3c-web-usb": "^1.0.13",
+    "@types/wicg-file-system-access": "^2023.10.7",
+    "@vite-pwa/sveltekit": "^1.1.0",
+    "autoprefixer": "^10.4.23",
+    "codemirror": "^6.0.2",
+    "cypress": "^14.5.3",
    "d3": "^7.9.0",
-    "esptool-js": "^0.5.4",
-    "flexsearch": "^0.8.147",
+    "esptool-js": "^0.5.7",
+    "flexsearch": "^0.8.212",
    "fontkit": "^2.0.4",
-    "glob": "^11.0.1",
-    "jsdom": "^26.0.0",
-    "matrix-js-sdk": "^37.2.0",
+    "glob": "^11.0.3",
+    "js-yaml": "^4.1.1",
+    "jsdom": "^26.1.0",
+    "matrix-js-sdk": "^37.12.0",
    "npm-run-all": "^4.1.5",
-    "prettier": "^3.5.3",
-    "prettier-plugin-svelte": "^3.3.3",
+    "prettier": "^3.7.4",
+    "prettier-plugin-css-order": "^2.2.0",
+    "prettier-plugin-svelte": "^3.4.1",
    "rxjs": "^7.8.2",
-    "sass": "^1.86.0",
-    "socket.io-client": "^4.8.1",
-    "stylelint": "^16.17.0",
-    "stylelint-config-clean-order": "^7.0.0",
+    "sass": "^1.97.2",
+    "semver": "^7.7.3",
+    "socket.io-client": "^4.8.3",
+    "stylelint": "^16.26.1",
    "stylelint-config-html": "^1.1.0",
    "stylelint-config-prettier-scss": "^1.0.0",
-    "stylelint-config-recommended-scss": "^14.1.0",
-    "stylelint-config-standard-scss": "^14.0.0",
-    "svelte": "5.25.3",
-    "svelte-check": "^4.1.5",
+    "stylelint-config-recommended-scss": "^16.0.2",
+    "stylelint-config-standard-scss": "^16.0.0",
+    "svelte": "5.46.1",
+    "svelte-check": "^4.3.5",
    "svelte-preprocess": "^6.0.3",
    "tippy.js": "^6.3.7",
    "typesafe-i18n": "^5.26.2",
-    "typescript": "^5.8.2",
-    "vite": "^6.2.4",
-    "vite-plugin-mkcert": "^1.17.8",
-    "vite-plugin-pwa": "^1.0.0",
-    "vitest": "^3.1.1",
+    "typescript": "^5.9.3",
+    "vite": "^7.3.1",
+    "vite-plugin-mkcert": "^1.17.9",
+    "vite-plugin-pwa": "^1.2.0",
+    "vitest": "^4.0.16",
    "web-serial-polyfill": "^1.0.15",
-    "workbox-window": "^7.3.0"
+    "workbox-window": "^7.4.0"
  },
  "type": "module"
 }
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -0,0 +1,2 @@
+onlyBuiltDependencies:
+  - svelte-preprocess
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "app"
-version = "2.3.0"
+version = "2.6.0"
 description = "A Tauri App"
 authors = ["Thea Schöbl <dev@theaninova.de>"]
 license = "AGPL-3"
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@@ -6,7 +6,7 @@
    "devPath": "http://localhost:5173",
    "distDir": "../build"
  },
-  "package": { "productName": "amacc1ng", "version": "2.3.0" },
+  "package": { "productName": "amacc1ng", "version": "2.6.0" },
  "tauri": {
    "allowlist": { "all": false },
    "bundle": {
--- a/src/i18n/de/index.ts
+++ b/src/i18n/de/index.ts
@@ -6,7 +6,7 @@ const de = {
  saveActions: {
    UNDO: "Rückgängig (<kbd class='icon'>shift</kbd> halten um alle Änderungen rückgängig zu machen)",
    REDO: "Wiederholen",
-    SAVE: "Speichern",
+    SAVE: "Anwended",
  },
  update: {
    TITLE: "Gerät aktualisieren",
@@ -18,10 +18,10 @@ const de = {
  },
  backup: {
    TITLE: "Backup",
-    AUTO_BACKUP: "Auto-backup",
+    AUTO_BACKUP: "Beschleunigtes Verbinden",
    DISCLAIMER:
-      "Das Backup in diesem Browser gespeichert und bleibt nur auf diesem Computer.",
-    DOWNLOAD: "Alles",
+      "<b>Nicht auf öffentlichen oder geteilten Computern einschalten.</b> Gerätedaten werden für schnelleren Zugriff lokal zwischengespeichert.",
+    DOWNLOAD: "Komplettes Profil",
    RESTORE: "Wiederherstellen",
  },
  modal: {
--- a/src/i18n/en/index.ts
+++ b/src/i18n/en/index.ts
@@ -7,17 +7,17 @@ const en = {
  saveActions: {
    UNDO: "Undo (hold <kbd class='icon'>shift</kbd> to undo all changes)",
    REDO: "Redo",
-    SAVE: "Save",
+    SAVE: "Apply",
  },
  update: {
    TITLE: "Update your device",
  },
  backup: {
    TITLE: "Backup",
-    AUTO_BACKUP: "Auto-backup",
+    AUTO_BACKUP: "Fast Connect",
    DISCLAIMER:
-      "Whenever you connect this device to browser, a backup is made locally and kept only on your computer.",
-    DOWNLOAD: "Everything",
+      "<b>Turn off if using a shared or public computer.</b> Caches your device's data locally for quick access next time you connect.",
+    DOWNLOAD: "Full profile",
    RESTORE: "Restore",
  },
  sync: {
--- a/src/lib/ProgressButton.svelte
+++ b/src/lib/ProgressButton.svelte
@@ -0,0 +1,121 @@
+<script lang="ts">
+  import type { Snippet } from "svelte";
+  import type { HTMLButtonAttributes } from "svelte/elements";
+
+  let {
+    onclick,
+    children,
+    working,
+    progress,
+    error,
+    disabled = false,
+    element = $bindable(),
+    ...restProps
+  }: {
+    onclick: () => void;
+    children: Snippet;
+    working: boolean;
+    progress: number;
+    error?: string;
+    disabled?: boolean;
+    element?: HTMLButtonElement;
+  } & HTMLButtonAttributes = $props();
+</script>
+
+<button
+  class:working={working && (progress <= 0 || progress >= 1)}
+  class:progress={working && progress > 0 && progress < 1}
+  style:--progress="{progress * 100}%"
+  class:primary={!error}
+  class:error={!!error}
+  disabled={disabled || working}
+  bind:this={element}
+  {...restProps}
+  {onclick}>{@render children()}</button
+>
+
+<style lang="scss">
+  @keyframes rotate {
+    0% {
+      transform: rotate(120deg);
+      opacity: 0;
+    }
+
+    20% {
+      transform: rotate(120deg);
+      opacity: 0;
+    }
+
+    60% {
+      opacity: 1;
+    }
+
+    100% {
+      transform: rotate(270deg);
+      opacity: 0;
+    }
+  }
+
+  button {
+    --height: 42px;
+    --border-radius: calc(var(--height) / 2);
+
+    position: relative;
+    transition:
+      border 200ms ease,
+      color 200ms ease;
+
+    margin: 6px;
+
+    outline: 2px dashed currentcolor;
+    outline-offset: 4px;
+
+    border: 2px solid currentcolor;
+    border-radius: var(--border-radius);
+
+    background: var(--md-sys-color-background);
+    height: var(--height);
+    overflow: hidden;
+
+    &.primary {
+      background: none;
+      color: var(--md-sys-color-primary);
+    }
+
+    &.progress,
+    &.working {
+      border-color: transparent;
+    }
+
+    &.working::before {
+      position: absolute;
+      z-index: -1;
+      border-radius: calc(var(--border-radius) - 2px);
+      background: var(--md-sys-color-background);
+      width: calc(100% - 4px);
+      height: calc(100% - 4px);
+      content: "";
+    }
+
+    &.working::after {
+      position: absolute;
+      z-index: -2;
+      animation: rotate 1s ease-out forwards infinite;
+      background: var(--md-sys-color-primary);
+      width: 120%;
+      height: 30%;
+      content: "";
+    }
+
+    &.progress::after {
+      position: absolute;
+      left: 0;
+      opacity: 0.2;
+      z-index: -2;
+      background: var(--md-sys-color-primary);
+      width: var(--progress);
+      height: 100%;
+      content: "";
+    }
+  }
+</style>
--- a/src/lib/assets/keymaps/keymap.d.ts
+++ b/src/lib/assets/keymaps/keymap.d.ts
@@ -16,4 +16,7 @@ export interface ActionInfo {
  variant: "left" | "right";
  variantOf: number;
  keyCode: string;
+  printable?: boolean;
+  separator?: boolean;
+  breaking?: boolean;
 }
--- a/src/lib/assets/layouts/generic/103-key.yml
+++ b/src/lib/assets/layouts/generic/103-key.yml
--- a/src/lib/assets/layouts/layout.d.ts
+++ b/src/lib/assets/layouts/layout.d.ts
@@ -0,0 +1,19 @@
+export interface CompiledLayout {
+  name: string;
+  size: [number, number];
+  keys: CompiledLayoutKey[];
+}
+
+export interface CompiledLayoutKey {
+  id: number;
+  shape: "quarter-circle" | "square";
+  cornerRadius: number;
+  size: [number, number];
+  pos: [number, number];
+  rotate: number;
+}
+
+declare module "*.layout.yml" {
+  const layout: CompiledLayout;
+  export default layout;
+}
--- a/src/lib/assets/layouts/lite.layout.yml
+++ b/src/lib/assets/layouts/lite.layout.yml
--- a/src/lib/assets/layouts/m4g.layout.yml
+++ b/src/lib/assets/layouts/m4g.layout.yml
--- a/src/lib/assets/layouts/m4gr.layout.yml
+++ b/src/lib/assets/layouts/m4gr.layout.yml
--- a/src/lib/assets/layouts/one.layout.yml
+++ b/src/lib/assets/layouts/one.layout.yml
--- a/src/lib/assets/layouts/t4g.layout.yml
+++ b/src/lib/assets/layouts/t4g.layout.yml
@@ -0,0 +1,10 @@
+name: T4G
+col:
+  - row:
+      - switch: { e: 3, n: 5, w: 4, s: 6 }
+  - offset: [0.5, 0]
+    row:
+      - key: 2
+  - row:
+      - key: 0
+      - key: 1
--- a/src/lib/backup/backup.ts
+++ b/src/lib/backup/backup.ts
@@ -14,7 +14,7 @@ import {
  settings,
 } from "$lib/undo-redo.js";
 import { get } from "svelte/store";
-import { serialPort } from "../serial/connection";
+import { activeProfile, serialPort } from "../serial/connection";
 import { csvLayoutToJson, isCsvLayout } from "$lib/backup/compat/legacy-layout";
 import { isCsvChords, csvChordsToJson } from "./compat/legacy-chords";

@@ -50,11 +50,9 @@ export function createLayoutBackup(): CharaLayoutFile {
    charaVersion: 1,
    type: "layout",
    device: get(serialPort)?.device,
-    layout: get(layout).map((it) => it.map((it) => it.action)) as [
-      number[],
-      number[],
-      number[],
-    ],
+    layout: (get(layout)[get(activeProfile)]?.map((it) =>
+      it.map((it) => it.action),
+    ) ?? []) as [number[], number[], number[]],
  };
 }

@@ -70,26 +68,30 @@ export function createSettingsBackup(): CharaSettingsFile {
  return {
    charaVersion: 1,
    type: "settings",
-    settings: get(settings).map((it) => it.value),
+    settings: get(settings)[get(activeProfile)]?.map((it) => it.value) ?? [],
  };
 }

-export async function restoreBackup(event: Event) {
+export async function restoreBackup(
+  event: Event,
+  only?: "chords" | "layout" | "settings",
+) {
  const input = (event.target as HTMLInputElement).files![0];
  if (!input) return;
  const text = await input.text();
  if (input.name.endsWith(".json")) {
-    restoreFromFile(JSON.parse(text));
+    restoreFromFile(JSON.parse(text), only);
  } else if (isCsvLayout(text)) {
-    restoreFromFile(csvLayoutToJson(text));
+    restoreFromFile(csvLayoutToJson(text), only);
  } else if (isCsvChords(text)) {
-    restoreFromFile(csvChordsToJson(text));
+    restoreFromFile(csvChordsToJson(text), only);
  } else {
  }
 }

 export function restoreFromFile(
  file: CharaBackupFile | CharaSettingsFile | CharaLayoutFile | CharaChordFile,
+  only?: "chords" | "layout" | "settings",
 ) {
  if (file.charaVersion !== 1) throw new Error("Incompatible backup");
  switch (file.type) {
@@ -97,9 +99,15 @@ export function restoreFromFile(
      const recent = file.history[0];
      if (!recent) return;
      let backupDevice = recent[1].device;
-      if (backupDevice === "TWO") backupDevice = "ONE";
+      if (backupDevice === "TWO" || backupDevice === "M4G")
+        backupDevice = "ONE";
+      else if (backupDevice === "ZERO" || backupDevice === "ENGINE")
+        backupDevice = "X";
      let currentDevice = get(serialPort)?.device;
-      if (currentDevice === "TWO") currentDevice = "ONE";
+      if (currentDevice === "TWO" || currentDevice === "M4G")
+        currentDevice = "ONE";
+      else if (currentDevice === "ZERO" || currentDevice === "ENGINE")
+        currentDevice = "X";

      if (backupDevice !== currentDevice) {
        alert("Backup is incompatible with this device");
@@ -108,33 +116,45 @@ export function restoreFromFile(

      changes.update((changes) => {
        changes.push([
-          ...getChangesFromChordFile(recent[0]),
-          ...getChangesFromLayoutFile(recent[1]),
-          ...getChangesFromSettingsFile(recent[2]),
+          ...(!only || only === "chords"
+            ? getChangesFromChordFile(recent[0])
+            : []),
+          ...(!only || only === "layout"
+            ? getChangesFromLayoutFile(recent[1])
+            : []),
+          ...(!only || only === "settings"
+            ? getChangesFromSettingsFile(recent[2])
+            : []),
        ]);
        return changes;
      });
      break;
    }
    case "chords": {
-      changes.update((changes) => {
-        changes.push(getChangesFromChordFile(file));
-        return changes;
-      });
+      if (!only || only === "chords") {
+        changes.update((changes) => {
+          changes.push(getChangesFromChordFile(file));
+          return changes;
+        });
+      }
      break;
    }
    case "layout": {
-      changes.update((changes) => {
-        changes.push(getChangesFromLayoutFile(file));
-        return changes;
-      });
+      if (!only || only === "layout") {
+        changes.update((changes) => {
+          changes.push(getChangesFromLayoutFile(file));
+          return changes;
+        });
+      }
      break;
    }
    case "settings": {
-      changes.update((changes) => {
-        changes.push(getChangesFromSettingsFile(file));
-        return changes;
-      });
+      if (!only || only === "settings") {
+        changes.update((changes) => {
+          changes.push(getChangesFromSettingsFile(file));
+          return changes;
+        });
+      }
      break;
    }
    default: {
@@ -167,12 +187,13 @@ export function getChangesFromChordFile(file: CharaChordFile) {
 export function getChangesFromSettingsFile(file: CharaSettingsFile) {
  const changes: Change[] = [];
  for (const [id, value] of file.settings.entries()) {
-    const setting = get(settings)[id];
+    const setting = get(settings)[get(activeProfile)]?.[id];
    if (setting !== undefined && setting.value !== value) {
      changes.push({
        type: ChangeType.Setting,
        id,
        setting: value,
+        profile: get(activeProfile),
      });
    }
  }
@@ -183,12 +204,13 @@ export function getChangesFromLayoutFile(file: CharaLayoutFile) {
  const changes: Change[] = [];
  for (const [layer, keys] of file.layout.entries()) {
    for (const [id, action] of keys.entries()) {
-      if (get(layout)[layer]?.[id]?.action !== action) {
+      if (get(layout)[get(activeProfile)]?.[layer]?.[id]?.action !== action) {
        changes.push({
          type: ChangeType.Layout,
          layer,
          id,
          action,
+          profile: get(activeProfile),
        });
      }
    }
--- a/src/lib/ccos/attachment.ts
+++ b/src/lib/ccos/attachment.ts
@@ -0,0 +1,26 @@
+import type { Attachment } from "svelte/attachments";
+import { browser } from "$app/environment";
+import { persistentWritable } from "$lib/storage";
+
+export const emulatedCCOS = persistentWritable("emulatedCCOS", false);
+
+export function ccosKeyInterceptor() {
+  return ((element: Window) => {
+    const ccos = browser
+      ? import("./ccos").then((module) => module.fetchCCOS(".test"))
+      : Promise.resolve(undefined);
+
+    function onEvent(event: KeyboardEvent) {
+      ccos.then((it) => it?.handleKeyEvent(event));
+    }
+
+    element.addEventListener("keydown", onEvent, true);
+    element.addEventListener("keyup", onEvent, true);
+
+    return () => {
+      ccos.then((it) => it?.destroy());
+      element.removeEventListener("keydown", onEvent, true);
+      element.removeEventListener("keyup", onEvent, true);
+    };
+  }) satisfies Attachment<Window>;
+}
--- a/src/lib/ccos/ccos-events.ts
+++ b/src/lib/ccos/ccos-events.ts
@@ -0,0 +1,37 @@
+export interface CCOSInitEvent {
+  type: "init";
+  url: string;
+}
+
+export interface CCOSKeyPressEvent {
+  type: "press";
+  code: number;
+}
+
+export interface CCOSKeyReleaseEvent {
+  type: "release";
+  code: number;
+}
+
+export interface CCOSSerialEvent {
+  type: "serial";
+  data: Uint8Array;
+}
+
+export type CCOSInEvent =
+  | CCOSInitEvent
+  | CCOSKeyPressEvent
+  | CCOSKeyReleaseEvent
+  | CCOSSerialEvent;
+
+export interface CCOSReportEvent {
+  type: "report";
+  modifiers: number;
+  keys: number[];
+}
+
+export interface CCOSReadyEvent {
+  type: "ready";
+}
+
+export type CCOSOutEvent = CCOSReportEvent | CCOSReadyEvent | CCOSSerialEvent;
--- a/src/lib/ccos/ccos-interop.ts
+++ b/src/lib/ccos/ccos-interop.ts
@@ -0,0 +1,111 @@
+export const KEYCODE_TO_SCANCODE = new Map<string, number | undefined>(
+  Object.entries({
+    KeyA: 0x04,
+    KeyB: 0x05,
+    KeyC: 0x06,
+    KeyD: 0x07,
+    KeyE: 0x08,
+    KeyF: 0x09,
+    KeyG: 0x0a,
+    KeyH: 0x0b,
+    KeyI: 0x0c,
+    KeyJ: 0x0d,
+    KeyK: 0x0e,
+    KeyL: 0x0f,
+    KeyM: 0x10,
+    KeyN: 0x11,
+    KeyO: 0x12,
+    KeyP: 0x13,
+    KeyQ: 0x14,
+    KeyR: 0x15,
+    KeyS: 0x16,
+    KeyT: 0x17,
+    KeyU: 0x18,
+    KeyV: 0x19,
+    KeyW: 0x1a,
+    KeyX: 0x1b,
+    KeyY: 0x1c,
+    KeyZ: 0x1d,
+    Digit1: 0x1e,
+    Digit2: 0x1f,
+    Digit3: 0x20,
+    Digit4: 0x21,
+    Digit5: 0x22,
+    Digit6: 0x23,
+    Digit7: 0x24,
+    Digit8: 0x25,
+    Digit9: 0x26,
+    Digit0: 0x27,
+    Enter: 0x28,
+    Escape: 0x29,
+    Backspace: 0x2a,
+    Tab: 0x2b,
+    Space: 0x2c,
+    Minus: 0x2d,
+    Equal: 0x2e,
+    BracketLeft: 0x2f,
+    BracketRight: 0x30,
+    Backslash: 0x31,
+    Semicolon: 0x33,
+    Quote: 0x34,
+    Backquote: 0x35,
+    Comma: 0x36,
+    Period: 0x37,
+    Slash: 0x38,
+    CapsLock: 0x39,
+    F1: 0x3a,
+    F2: 0x3b,
+    F3: 0x3c,
+    F4: 0x3d,
+    F5: 0x3e,
+    F6: 0x3f,
+    F7: 0x40,
+    F8: 0x41,
+    F9: 0x42,
+    F10: 0x43,
+    F11: 0x44,
+    F12: 0x45,
+    PrintScreen: 0x46,
+    ScrollLock: 0x47,
+    Pause: 0x48,
+    Insert: 0x49,
+    Home: 0x4a,
+    PageUp: 0x4b,
+    Delete: 0x4c,
+    End: 0x4d,
+    PageDown: 0x4e,
+    ArrowRight: 0x4f,
+    ArrowLeft: 0x50,
+    ArrowDown: 0x51,
+    ArrowUp: 0x52,
+    NumLock: 0x53,
+    NumpadDivide: 0x54,
+    NumpadMultiply: 0x55,
+    NumpadSubtract: 0x56,
+    NumpadAdd: 0x57,
+    NumpadEnter: 0x58,
+    Numpad1: 0x59,
+    Numpad2: 0x5a,
+    Numpad3: 0x5b,
+    Numpad4: 0x5c,
+    Numpad5: 0x5d,
+    Numpad6: 0x5e,
+    Numpad7: 0x5f,
+    Numpad8: 0x60,
+    Numpad9: 0x61,
+    Numpad0: 0x62,
+    NumpadDecimal: 0x63,
+    ControlLeft: 0xe0,
+    ShiftLeft: 0xe1,
+    AltLeft: 0xe2,
+    MetaLeft: 0xe3,
+    ControlRight: 0xe4,
+    ShiftRight: 0xe5,
+    AltRight: 0xe6,
+    MetaRight: 0xe7,
+  }),
+);
+
+export const SCANCODE_TO_KEYCODE = new Map<number, string>(
+  KEYCODE_TO_SCANCODE.entries().map(([key, value]) => [value!, key]),
+);
--- a/src/lib/ccos/ccos.ts
+++ b/src/lib/ccos/ccos.ts
@@ -0,0 +1,232 @@
+import { getMeta } from "$lib/meta/meta-storage";
+import type { SerialPortLike } from "$lib/serial/device";
+import type {
+  CCOSInEvent,
+  CCOSInitEvent,
+  CCOSKeyPressEvent,
+  CCOSKeyReleaseEvent,
+  CCOSOutEvent,
+} from "./ccos-events";
+import { KEYCODE_TO_SCANCODE, SCANCODE_TO_KEYCODE } from "./ccos-interop";
+
+const device = "zero_wasm";
+
+class CCOSKeyboardEvent extends KeyboardEvent {
+  constructor(...params: ConstructorParameters<typeof KeyboardEvent>) {
+    super(...params);
+  }
+}
+
+const MASK_CTRL = 0b0001_0001;
+const MASK_SHIFT = 0b0010_0010;
+const MASK_ALT = 0b0100_0100;
+const MASK_ALT_GRAPH = 0b0000_0100;
+const MASK_GUI = 0b1000_1000;
+
+export class CCOS implements SerialPortLike {
+  private readonly currKeys = new Set<number>();
+
+  private readonly layout = new Map<string, string>();
+
+  private readonly worker = new Worker("/ccos-worker.js", { type: "module" });
+
+  private resolveReady!: () => void;
+  private ready = new Promise<void>((resolve) => {
+    this.resolveReady = resolve;
+  });
+
+  private lastEvent?: KeyboardEvent;
+
+  private onKey(
+    type: ConstructorParameters<typeof KeyboardEvent>[0],
+    modifiers: number,
+    scanCode: number,
+  ) {
+    if (!this.lastEvent) {
+      return;
+    }
+
+    const code = SCANCODE_TO_KEYCODE.get(scanCode);
+    if (code === undefined) {
+      return;
+    }
+
+    const layoutKey = [code];
+    if (modifiers & MASK_SHIFT) {
+      layoutKey.push("Shift");
+    }
+    if (modifiers & MASK_ALT_GRAPH) {
+      layoutKey.push("AltGraph");
+    }
+    const key = this.layout.get(JSON.stringify(layoutKey)) ?? code;
+
+    const params: Required<KeyboardEventInit> = {
+      bubbles: true,
+      cancelable: true,
+      location: this.lastEvent.location,
+      repeat: this.lastEvent.repeat,
+      detail: this.lastEvent.detail,
+      view: this.lastEvent.view,
+      isComposing: this.lastEvent.isComposing,
+      which: this.lastEvent.which,
+      composed: this.lastEvent.composed,
+      key,
+      code,
+      charCode: key.charCodeAt(0),
+      keyCode: this.lastEvent.keyCode,
+      shiftKey: (modifiers & MASK_SHIFT) !== 0,
+      ctrlKey: (modifiers & MASK_CTRL) !== 0,
+      metaKey: (modifiers & MASK_GUI) !== 0,
+      altKey: (modifiers & MASK_ALT) !== 0,
+      modifierAltGraph: (modifiers & MASK_ALT_GRAPH) !== 0,
+      modifierCapsLock: this.lastEvent.getModifierState("CapsLock"),
+      modifierFn: this.lastEvent.getModifierState("Fn"),
+      modifierFnLock: this.lastEvent.getModifierState("FnLock"),
+      modifierHyper: this.lastEvent.getModifierState("Hyper"),
+      modifierNumLock: this.lastEvent.getModifierState("NumLock"),
+      modifierSuper: (modifiers & MASK_GUI) !== 0,
+      modifierSymbol: this.lastEvent.getModifierState("Symbol"),
+      modifierSymbolLock: this.lastEvent.getModifierState("SymbolLock"),
+      modifierScrollLock: this.lastEvent.getModifierState("ScrollLock"),
+    };
+
+    this.lastEvent.target?.dispatchEvent(new CCOSKeyboardEvent(type, params));
+  }
+
+  private onReport(modifiers: number, keys: number[]) {
+    const nextKeys = new Set<number>(keys);
+    nextKeys.delete(0);
+    for (const key of this.currKeys) {
+      if (!nextKeys.has(key)) {
+        this.onKey("keyup", modifiers, key);
+      }
+    }
+    for (const key of nextKeys) {
+      if (!this.currKeys.has(key)) {
+        this.onKey("keydown", modifiers, key);
+      }
+    }
+    this.currKeys.clear();
+    for (const key of keys) {
+      this.currKeys.add(key);
+    }
+    this.currKeys.delete(0);
+  }
+
+  private controller?: ReadableStreamDefaultController<Uint8Array>;
+
+  readable!: ReadableStream<Uint8Array>;
+  writable!: WritableStream<Uint8Array>;
+
+  constructor(url: string) {
+    this.worker.addEventListener(
+      "message",
+      (event: MessageEvent<CCOSOutEvent>) => {
+        if (event.data instanceof Uint8Array) {
+          this.controller?.enqueue(event.data);
+          return;
+        }
+        console.log("CCOS worker message", event.data);
+        switch (event.data.type) {
+          case "ready": {
+            this.resolveReady();
+            break;
+          }
+          case "report": {
+            this.onReport(event.data.modifiers, event.data.keys);
+            break;
+          }
+        }
+      },
+    );
+    (navigator as any).keyboard
+      ?.getLayoutMap()
+      ?.then((it: Map<string, string>) =>
+        it.entries().forEach(([key, value]) => {
+          this.layout.set(JSON.stringify([key]), value);
+        }),
+      );
+    this.worker.postMessage({
+      type: "init",
+      url,
+    } satisfies CCOSInitEvent);
+  }
+
+  getInfo(): SerialPortInfo {
+    return {};
+  }
+
+  async open(_options: SerialOptions) {
+    this.readable = new ReadableStream<Uint8Array>({
+      start: (controller) => {
+        this.controller = controller;
+      },
+    });
+    this.writable = new WritableStream<Uint8Array>({
+      write: (chunk) => {
+        this.worker.postMessage(chunk, [chunk.buffer]);
+      },
+    });
+    return this.ready;
+  }
+  async close() {
+    await this.ready;
+  }
+  async forget() {
+    await this.ready;
+    this.close();
+    this.worker.terminate();
+  }
+
+  async handleKeyEvent(event: KeyboardEvent) {
+    if (
+      event.target instanceof HTMLInputElement ||
+      event.target instanceof HTMLTextAreaElement
+    ) {
+      console.error("CCOS does not support input elements");
+      return;
+    }
+
+    if (!this.ready || event instanceof CCOSKeyboardEvent) {
+      return;
+    }
+    event.stopImmediatePropagation();
+    event.preventDefault();
+    this.lastEvent = event;
+
+    const layoutKey = [event.code];
+    if (event.getModifierState("Shift")) {
+      layoutKey.push("Shift");
+    }
+    if (event.getModifierState("AltGraph")) {
+      layoutKey.push("AltGraph");
+    }
+    this.layout.set(JSON.stringify(layoutKey), event.key);
+
+    const scanCode = KEYCODE_TO_SCANCODE.get(event.code);
+    if (scanCode === undefined) return;
+    if (event.type === "keydown") {
+      this.worker.postMessage({
+        type: "press",
+        code: scanCode,
+      } satisfies CCOSKeyPressEvent);
+    } else {
+      this.worker.postMessage({
+        type: "release",
+        code: scanCode,
+      } satisfies CCOSKeyReleaseEvent);
+    }
+  }
+}
+
+export async function fetchCCOS(
+  version = ".2.2.0-beta.12+266bdda",
+  fetch: typeof window.fetch = window.fetch,
+): Promise<CCOS | undefined> {
+  const meta = await getMeta(device, version, fetch);
+  if (!meta?.update.js || !meta?.update.wasm) {
+    return undefined;
+  }
+
+  return new CCOS(`${meta.path}/${meta.update.js}`);
+}
--- a/src/lib/charrecorder/CharRecorder.svelte
+++ b/src/lib/charrecorder/CharRecorder.svelte
@@ -10,14 +10,18 @@
    replay,
    cursor = false,
    keys = false,
+    paused = false,
    children,
    ondone,
+    ontick,
  }: {
    replay: ReplayPlayer | Replay;
    cursor?: boolean;
    keys?: boolean;
+    paused?: boolean;
    children?: Snippet;
    ondone?: () => void;
+    ontick?: (time: number) => void;
  } = $props();

  let replayPlayer: ReplayPlayer | undefined = $state();
@@ -45,6 +49,10 @@

  $effect(() => {
    if (!svg || !text) return;
+    if (paused) {
+      text.textContent = finalText ?? "";
+      return;
+    }
    const player =
      replay instanceof ReplayPlayer ? replay : new ReplayPlayer(replay);
    replayPlayer = player;
@@ -63,6 +71,7 @@
    const unsubscribePlayer = player.subscribe(apply);
    textRenderer = renderer;

+    player.onTick = ontick;
    player.onDone = ondone;
    player.start();
    apply();
@@ -70,8 +79,11 @@
      renderer.animated = true;
    });
    return () => {
+      textRenderer = undefined;
+      replayPlayer = undefined;
      unsubscribePlayer();
-      player?.destroy();
+      player.destroy();
+      renderer.destroy();
    };
  });

@@ -88,7 +100,7 @@
 {#key replay}
  <svg bind:this={svg}></svg>
  {#if browser}
-    <span use:innerText={text}></span>
+    <span use:innerText={text} style:opacity={paused ? 1 : 0}></span>
  {:else if !(replay instanceof ReplayPlayer)}
    {finalText}
  {/if}
@@ -104,7 +116,6 @@
  }

  span {
-    opacity: 0;
    white-space: pre-wrap;
    overflow-wrap: break-word;
  }
@@ -113,15 +124,15 @@
    position: absolute;
    top: 0;
    left: 0;
-    font-family: inherit;
-    font-size: inherit;
    color: inherit;
+    font-size: inherit;
+    font-family: inherit;
    user-select: none;
  }

  svg > :global(text) {
-    font-family: inherit;
    font-size: inherit;
+    font-family: inherit;
    fill: currentColor;
    dominant-baseline: middle;
  }
--- a/src/lib/charrecorder/ChordHud.svelte
+++ b/src/lib/charrecorder/ChordHud.svelte
@@ -83,24 +83,24 @@

 <style>
  section {
+    display: grid;
    position: relative;
    margin: 1em;
    margin-bottom: 0;
-    display: grid;
    height: 3em;
    font-size: 2em;
  }

  .rating {
-    font-weight: bold;
    font-style: italic;
+    font-weight: bold;
    text-transform: uppercase;
  }

  .tile {
+    border-radius: 0.1em;
    width: 100%;
    height: 0.2em;
-    border-radius: 0.1em;
  }

  kbd {
@@ -112,19 +112,19 @@
  }

  .chord {
-    will-change: transform, opacity, scale;
+    display: flex;
    position: absolute;
    top: 0;
    left: 50%;
-    display: flex;
    flex-direction: column;
-    margin-inline-end: 1em;
-    padding-inline: 0.1em;
    justify-content: center;
    align-items: center;
    transition:
      opacity 0.3s ease,
      translate 0.3s ease,
      scale 0.3s ease;
+    will-change: transform, opacity, scale;
+    margin-inline-end: 1em;
+    padding-inline: 0.1em;
  }
 </style>
--- a/src/lib/charrecorder/core/player.ts
+++ b/src/lib/charrecorder/core/player.ts
@@ -12,7 +12,10 @@ export class ReplayPlayer {

  startTime = performance.now();

-  private animationFrameId: number | null = null;
+  private animationFrameId: ReturnType<typeof requestAnimationFrame> | null =
+    null;
+
+  private timeoutId: ReturnType<typeof setTimeout> | null = null;

  timescale = 1;

@@ -20,6 +23,8 @@ export class ReplayPlayer {

  onDone?: () => void;

+  onTick?: (time: number) => void;
+
  constructor(
    readonly replay: Replay,
    plugins: ReplayPlugin[] = [],
@@ -47,6 +52,7 @@ export class ReplayPlayer {
    }

    const now = performance.now() - this.startTime;
+    this.onTick?.(now);

    while (
      this.replayCursor < this.replay.keys.length &&
@@ -131,7 +137,7 @@ export class ReplayPlayer {
      }
      return this;
    }
-    setTimeout(() => {
+    this.timeoutId = setTimeout(() => {
      this.startTime = performance.now();
      this.animationFrameId = requestAnimationFrame(this.updateLoop.bind(this));
    }, delay);
@@ -139,6 +145,9 @@ export class ReplayPlayer {
  }

  destroy() {
+    if (this.timeoutId) {
+      clearTimeout(this.timeoutId);
+    }
    if (this.animationFrameId) {
      cancelAnimationFrame(this.animationFrameId);
    }
--- a/src/lib/charrecorder/core/recorder.ts
+++ b/src/lib/charrecorder/core/recorder.ts
@@ -56,7 +56,7 @@ export class ReplayRecorder {

  finish(trim = true, round = true) {
    return {
-      start: maybeRound(trim ? this.replay[0]?.[2] : this.start, round),
+      start: maybeRound(trim ? this.replay[0]?.[2] : this.start, round) ?? 0,
      finish: maybeRound(
        trim
          ? Math.max(...this.replay.map((it) => it[2] + it[3]))
@@ -74,6 +74,6 @@ export class ReplayRecorder {
            ] as const,
        )
        .sort((a, b) => a[2] - b[2]),
-    };
+    } satisfies Replay;
  }
 }
--- a/src/lib/charrecorder/renderer/renderer.ts
+++ b/src/lib/charrecorder/renderer/renderer.ts
@@ -279,6 +279,18 @@ export class TextRenderer {
    }
  }

+  destroy() {
+    this.cursorNode.remove();
+    for (const node of this.nodes.values()) {
+      node.remove();
+    }
+    for (const node of this.heldNodes.values()) {
+      node.remove();
+    }
+    this.nodes.clear();
+    this.heldNodes.clear();
+  }
+
  private isShiny(char: TextToken, index: number) {
    return (
      this.shiny?.includes(index) ||
--- a/src/lib/chat/MatrixRoomMembers.svelte
+++ b/src/lib/chat/MatrixRoomMembers.svelte
@@ -37,16 +37,16 @@

 <style lang="scss">
  .avatar {
+    flex-shrink: 0;
    border-radius: 50%;
    width: 32px;
    height: 32px;
-    flex-shrink: 0;
  }

  .avatar-placeholder {
    display: flex;
-    align-items: center;
    justify-content: center;
+    align-items: center;
    font-size: 24px;
  }

@@ -61,8 +61,8 @@
    flex-direction: column;
    gap: 0.5rem;
    padding: 8px;
-    overflow-y: auto;
    height: 100%;
+    overflow-y: auto;
  }

  span {
--- a/src/lib/chat/MatrixRooms.svelte
+++ b/src/lib/chat/MatrixRooms.svelte
@@ -53,17 +53,17 @@

  .room {
    display: flex;
-    align-items: center;
    justify-content: flex-start;
+    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
-    padding-block: 2px;
-    min-height: 0;
-    height: unset;
-    padding-inline: 16px;
-    padding-block: 4px;
    border-radius: 8px;
+    padding-inline: 16px;
+    padding-block: 2px;
+    padding-block: 4px;
    width: 100%;
+    height: unset;
+    min-height: 0;

    &.active {
      background: var(--md-sys-color-primary-container);
--- a/src/lib/chat/MatrixTimeline.svelte
+++ b/src/lib/chat/MatrixTimeline.svelte
@@ -178,17 +178,17 @@
  $border-radius: 16px;

  .input {
-    border: 1px solid var(--md-sys-color-outline);
    flex-grow: 1;
    cursor: text;
+    border: 1px solid var(--md-sys-color-outline);
+    border-radius: $border-radius;
    padding: 0.5em;
    font-size: 1rem;
-    border-radius: $border-radius;

    text-wrap: wrap;
    white-space: pre-wrap;
-    overflow-wrap: break-word;
    word-break: break-word;
+    overflow-wrap: break-word;

    &:focus-visible {
      outline: none;
@@ -197,9 +197,9 @@

  .input-box {
    display: flex;
+    flex-shrink: 0;
    gap: 4px;
    padding-block: 8px;
-    flex-shrink: 0;
    width: 100%;
  }

@@ -209,23 +209,23 @@
  }

  .timeline {
-    contain: content;
-    height: auto;
    display: flex;
-    flex-direction: column-reverse;
-    overflow-y: scroll;
-    overflow-x: hidden;
    flex-grow: 1;
+    flex-direction: column-reverse;
+    contain: content;
    width: 100%;
+    height: auto;
+    overflow-x: hidden;
+    overflow-y: scroll;
  }

  section {
    display: flex;
    flex-direction: column;
-    overflow: hidden;
    justify-content: flex-end;

    width: 100%;
    height: 100%;
+    overflow: hidden;
  }
 </style>
--- a/src/lib/chat/events/MatrixEvent.svelte
+++ b/src/lib/chat/events/MatrixEvent.svelte
@@ -255,21 +255,21 @@
  }

  .toolbar {
+    display: flex;
    position: absolute;
    top: -26px;
    right: 0;
-    background: var(--md-sys-color-secondary-container);
-    color: var(--md-sys-color-on-secondary-container);
-    padding: 4px;
-    border-radius: 4px;
-    display: flex;
    z-index: 100;
+    border-radius: 4px;
+    background: var(--md-sys-color-secondary-container);
+    padding: 4px;
+    color: var(--md-sys-color-on-secondary-container);

    a,
    button {
-      font-size: 16px;
      width: 24px;
      height: 24px;
+      font-size: 16px;
    }
  }

@@ -289,10 +289,10 @@
  }

  .dot {
+    animation: bounce 1s infinite;
+    border-radius: 50%;
    width: 6px;
    height: 6px;
-    border-radius: 50%;
-    animation: bounce 1s infinite;
  }

  .sender,
@@ -302,10 +302,10 @@

  .avatar {
    grid-area: avatar;
+    translate: 0 2px;
+    border-radius: 50%;
    width: 32px;
    height: 32px;
-    border-radius: 50%;
-    translate: 0 2px;
  }

  div.avatar {
@@ -322,18 +322,18 @@
  }

  .reactions {
-    grid-area: reactions;
-    margin-top: 2px;
    display: flex;
+    grid-area: reactions;
    gap: 4px;
+    margin-top: 2px;
  }

  .reaction {
-    border: 1px solid var(--md-sys-color-outline);
-    padding: 6px;
-    border-radius: 6px;
-    height: 24px;
    display: flex;
+    border: 1px solid var(--md-sys-color-outline);
+    border-radius: 6px;
+    padding: 6px;
+    height: 24px;
    font-size: 12px;

    > .count {
@@ -344,16 +344,16 @@
  .event {
    display: grid;
    position: relative;
-    padding-inline: 0.5em;
-    margin-inline: 0.5em;
-    padding-block: 0.25em;
-    border-radius: 4px;
+    grid-template-columns: 32px 1fr auto;

    grid-template-areas:
      "avatar sender date"
      "avatar content content"
      "none reactions reactions";
-    grid-template-columns: 32px 1fr auto;
+    margin-inline: 0.5em;
+    border-radius: 4px;
+    padding-inline: 0.5em;
+    padding-block: 0.25em;
  }

  .content {
@@ -370,12 +370,12 @@

  .backdrop {
    position: absolute;
-    inset: 0;
-    z-index: -1;
    opacity: 0.25;
-
-    background: var(--md-sys-color-surface-variant);
+    z-index: -1;
+    inset: 0;

    border-radius: 8px;
+
+    background: var(--md-sys-color-surface-variant);
  }
 </style>
--- a/src/lib/chat/events/MatrixMessageEvent.svelte
+++ b/src/lib/chat/events/MatrixMessageEvent.svelte
@@ -39,9 +39,9 @@
  }

  img {
+    border-radius: 8px;
    max-width: 100%;
    max-height: 16em;
-    border-radius: 8px;
  }

  .content {
--- a/src/lib/chord-editor/AutospaceSelector.svelte
+++ b/src/lib/chord-editor/AutospaceSelector.svelte
@@ -0,0 +1,54 @@
+<script lang="ts">
+  import { actionTooltip } from "$lib/title";
+
+  let {
+    onchange,
+    value,
+    variant,
+  }: {
+    value: boolean;
+    variant: "start" | "end";
+    onchange: (
+      event: Event & { currentTarget: EventTarget & HTMLInputElement },
+    ) => void;
+  } = $props();
+</script>
+
+{#snippet tooltip()}
+  {#if value}
+    {#if variant === "start"}
+      <b>Remove</b> preceding space
+    {:else}
+      <b>Add</b> trailing space
+    {/if}
+  {:else if variant === "start"}
+    <b>Keep</b> preceding space
+  {:else}
+    <b>Add</b> trailing space
+  {/if}
+{/snippet}
+<label class="autospace" {@attach actionTooltip(tooltip)}
+  ><span class="icon">space_bar</span><input
+    checked={!value}
+    {onchange}
+    type="checkbox"
+  /></label
+>
+
+<style lang="scss">
+  label.autospace {
+    display: inline-flex;
+    vertical-align: middle;
+    margin-inline: 8px;
+    border-radius: 4px;
+    background: var(--md-sys-color-tertiary-container);
+    padding-inline: 0;
+    height: 1em;
+    color: var(--md-sys-color-on-tertiary-container);
+    font-size: 1.3em;
+
+    &:has(:checked) {
+      opacity: var(--auto-space-show, 0);
+    }
+  }
+</style>
--- a/src/lib/chord-editor/action-linter.ts
+++ b/src/lib/chord-editor/action-linter.ts
@@ -0,0 +1,203 @@
+import { type KeyInfo } from "$lib/serial/keymap-codes";
+import { syntaxTree } from "@codemirror/language";
+import { linter, type Diagnostic } from "@codemirror/lint";
+import { parsedChordsField } from "./parsed-chords-plugin";
+import { actionMetaPlugin } from "./action-meta-plugin";
+
+export function actionLinter(config?: Parameters<typeof linter>[1]) {
+  const finalConfig: Parameters<typeof linter>[1] = {
+    ...config,
+    needsRefresh(update) {
+      console.log(
+        "test",
+        update.startState.field(actionMetaPlugin.field) !==
+          update.state.field(actionMetaPlugin.field),
+        update.startState.field(parsedChordsField) !==
+          update.state.field(parsedChordsField),
+      );
+      return (
+        update.startState.field(actionMetaPlugin.field) !==
+          update.state.field(actionMetaPlugin.field) ||
+        update.startState.field(parsedChordsField) !==
+          update.state.field(parsedChordsField)
+      );
+    },
+  };
+  return linter((view) => {
+    console.log("lint");
+    const diagnostics: Diagnostic[] = [];
+    const { ids, codes } = view.state.field(actionMetaPlugin.field);
+    const { meta, compoundInputs } = view.state.field(parsedChordsField);
+
+    syntaxTree(view.state)
+      .cursor()
+      .iterate((node) => {
+        let action: KeyInfo | undefined = undefined;
+        switch (node.name) {
+          case "SingleLetter": {
+            action = ids.get(view.state.doc.sliceString(node.from, node.to));
+            break;
+          }
+          case "ActionId": {
+            action = ids.get(view.state.doc.sliceString(node.from, node.to));
+            break;
+          }
+          case "HexNumber": {
+            const hexString = view.state.doc.sliceString(node.from, node.to);
+            const code = Number.parseInt(hexString, 16);
+            if (hexString.length === 10) {
+              if (compoundInputs.has(code)) {
+                diagnostics.push({
+                  from: node.from,
+                  to: node.to,
+                  severity: "info",
+                  message: "Compound hash literal can be expanded",
+                  actions: [
+                    {
+                      name: "Expand",
+                      apply(view, from, to) {
+                        view.dispatch({
+                          changes: {
+                            from: from - 1,
+                            to: to + 1,
+                            insert: compoundInputs.get(code)! + "|",
+                          },
+                        });
+                      },
+                    },
+                  ],
+                });
+              }
+              return;
+            }
+
+            if (!(code >= 0 && code <= 1023)) {
+              diagnostics.push({
+                from: node.from,
+                to: node.to,
+                severity: "error",
+                message: "Hex code invalid (out of range)",
+                actions: [
+                  {
+                    name: "Remove",
+                    apply(view, from, to) {
+                      view.dispatch({ changes: { from, to } });
+                    },
+                  },
+                ],
+              });
+              return;
+            }
+
+            action = codes.get(code);
+            break;
+          }
+          default:
+            return;
+        }
+        if (!action) {
+          const action = view.state.doc.sliceString(node.from, node.to);
+          diagnostics.push({
+            from: node.from,
+            to: node.to,
+            severity: node.name === "HexNumber" ? "warning" : "error",
+            message: `Unknown action: ${action}`,
+            actions: [
+              ...(node.name === "SingleLetter"
+                ? ([
+                    {
+                      name: "Generate Windows Hex Numpad Code",
+                      apply(view, from, to) {
+                        view.dispatch({
+                          changes: {
+                            from,
+                            to,
+                            insert:
+                              "<PRESS_NEXT><LEFT_ALT><KP_PLUS>" +
+                              action
+                                .codePointAt(0)!
+                                .toString(16)
+                                .split("")
+                                .map((c) =>
+                                  /^\d$/.test(c)
+                                    ? `<KP_${c}>`
+                                    : c.toLowerCase(),
+                                )
+                                .join("") +
+                              "<RELEASE_NEXT><LEFT_ALT>",
+                          },
+                        });
+                      },
+                    },
+                  ] satisfies Diagnostic["actions"])
+                : []),
+            ],
+          });
+        }
+      });
+
+    for (const m of meta) {
+      if (m.invalidActions) {
+        diagnostics.push({
+          from: m.from,
+          to: m.to,
+          severity: "error",
+          markClass: "chord-invalid",
+          message: `Chord contains invalid actions`,
+        });
+      }
+      if (m.invalidInput) {
+        diagnostics.push({
+          from: m.from,
+          to: m.to,
+          severity: "error",
+          markClass: "chord-invalid",
+          message: `Chord input is invalid`,
+        });
+      }
+      if (m.emptyPhrase) {
+        diagnostics.push({
+          from: m.from,
+          to: m.from,
+          severity: "warning",
+          message: `Chord phrase is empty`,
+        });
+      }
+      if (m.overriddenBy) {
+        diagnostics.push({
+          from: m.from,
+          to: m.from,
+          severity: "warning",
+          message: `Chord overridden by previous chord`,
+        });
+      }
+      if (m.orphan) {
+        diagnostics.push({
+          from: m.from,
+          to: m.from,
+          severity: "warning",
+          message: `Orphan compound chord`,
+        });
+      }
+      if (m.disabled) {
+        diagnostics.push({
+          from: m.from,
+          to: m.to,
+          severity: "info",
+          markClass: "chord-ignored",
+          message: `Chord disabled`,
+        });
+      }
+      if ((m.overrides?.length ?? 0) > 0) {
+        diagnostics.push({
+          from: m.from,
+          to: m.from,
+          severity: "info",
+          message: `Chord overrides other chords`,
+        });
+      }
+    }
+
+    return diagnostics;
+  }, finalConfig);
+}
--- a/src/lib/chord-editor/action-meta-plugin.ts
+++ b/src/lib/chord-editor/action-meta-plugin.ts
@@ -0,0 +1,10 @@
+import { KEYMAP_CODES, KEYMAP_IDS } from "$lib/serial/keymap-codes";
+import { derived } from "svelte/store";
+import { reactiveStateField } from "./store-state-field";
+
+const actionMeta = derived([KEYMAP_IDS, KEYMAP_CODES], ([ids, codes]) => ({
+  ids,
+  codes,
+}));
+
+export const actionMetaPlugin = reactiveStateField(actionMeta);
--- a/src/lib/chord-editor/action-plugin.ts
+++ b/src/lib/chord-editor/action-plugin.ts
@@ -0,0 +1,105 @@
+import {
+  Decoration,
+  EditorView,
+  ViewPlugin,
+  ViewUpdate,
+  WidgetType,
+} from "@codemirror/view";
+import { mount, unmount } from "svelte";
+import Action from "$lib/components/Action.svelte";
+import { syntaxTree } from "@codemirror/language";
+import type { Range } from "@codemirror/state";
+
+export class ActionWidget extends WidgetType {
+  component?: {};
+
+  constructor(readonly id: string | number) {
+    super();
+    this.id = id;
+  }
+
+  /*override eq(other: ActionWidget) {
+    return this.id == other.id;
+  }*/
+
+  toDOM() {
+    if (this.component) {
+      unmount(this.component);
+    }
+    const element = document.createElement("span");
+    element.style.paddingInline = "2px";
+
+    this.component = mount(Action, {
+      target: element,
+      props: { action: this.id, display: "keys", inText: true },
+    });
+    return element;
+  }
+
+  override ignoreEvent() {
+    return true;
+  }
+
+  override destroy() {
+    if (this.component) {
+      unmount(this.component);
+    }
+  }
+}
+
+function actionWidgets(view: EditorView) {
+  const widgets: Range<Decoration>[] = [];
+  for (const { from, to } of view.visibleRanges) {
+    syntaxTree(view.state).iterate({
+      from,
+      to,
+      enter: (node) => {
+        if (node.name !== "ExplicitAction") return;
+        const value =
+          node.node.getChild("ActionId") ?? node.node.getChild("HexNumber");
+        if (!value) return;
+        if (!node.node.getChild("ExplicitDelimEnd")) {
+          return;
+        }
+        const id = view.state.doc.sliceString(value.from, value.to);
+        if (value.name === "HexNumber" && id.length === 10) return;
+        let deco = Decoration.replace({
+          widget: new ActionWidget(
+            value.name === "ActionId" ? id : Number.parseInt(id, 16),
+          ),
+        });
+        widgets.push(deco.range(node.from, node.to));
+      },
+    });
+  }
+  return Decoration.set(widgets);
+}
+
+export const actionPlugin = ViewPlugin.fromClass(
+  class {
+    decorations = Decoration.none;
+
+    constructor(view: EditorView) {
+      this.decorations = actionWidgets(view);
+    }
+
+    update(update: ViewUpdate) {
+      if (
+        update.docChanged ||
+        update.viewportChanged ||
+        syntaxTree(update.startState) != syntaxTree(update.state)
+      )
+        this.decorations = actionWidgets(update.view);
+    }
+  },
+  {
+    decorations(instance) {
+      return instance.decorations;
+    },
+    provide(plugin) {
+      return EditorView.atomicRanges.of(
+        (view) => view.plugin(plugin)?.decorations ?? Decoration.none,
+      );
+    },
+  },
+);
--- a/src/lib/chord-editor/action-serializer.ts
+++ b/src/lib/chord-editor/action-serializer.ts
@@ -0,0 +1,310 @@
+import {
+  KEYMAP_CODES,
+  KEYMAP_IDS,
+  type KeyInfo,
+} from "$lib/serial/keymap-codes";
+import type { CharaChordFile } from "$lib/share/chara-file";
+import { syntaxTree } from "@codemirror/language";
+import { StateEffect, ChangeDesc, type EditorState } from "@codemirror/state";
+import type { Update } from "@codemirror/collab";
+import { get } from "svelte/store";
+import {
+  composeChordInput,
+  hasConcatenator,
+  hashChord,
+  splitCompound,
+  willBeValidChordInput,
+} from "$lib/serial/chord";
+import type { SyntaxNodeRef } from "@lezer/common";
+
+export function canUseIdAsString(info: KeyInfo): boolean {
+  return !!info.id && /^[a-zA-Z_][a-zA-Z0-9_]*$/.test(info.id);
+}
+
+export function actionToValue(action: number | KeyInfo) {
+  const info =
+    typeof action === "number" ? get(KEYMAP_CODES).get(action) : action;
+  if (info && info.id?.length === 1)
+    return /^[<>|\\\s]$/.test(info.id) ? `\\${info.id}` : info.id;
+  if (!info || !canUseIdAsString(info))
+    return `<0x${(info?.code ?? action).toString(16).padStart(2, "0")}>`;
+  return `<${info.id}>`;
+}
+
+export interface ParseMeta {
+  from: number;
+  to: number;
+  hasConcatenator: boolean;
+  invalidActions?: true;
+  invalidInput?: true;
+  emptyPhrase?: true;
+  orphan?: true;
+  disabled?: true;
+  overrides?: number[];
+  overriddenBy?: number;
+}
+
+export interface ParseResult {
+  result: CharaChordFile["chords"];
+  meta: ParseMeta[];
+  compoundInputs: Map<number, string>;
+}
+
+export function parseCharaChords(
+  data: EditorState,
+  ids: Map<string, KeyInfo>,
+  codes: Map<number, KeyInfo>,
+): ParseResult {
+  console.time("parseCharaChords");
+  const chords: CharaChordFile["chords"] = [];
+  const metas: ParseMeta[] = [];
+  const keys = new Map<string, number>();
+  const compoundInputs = new Map<number, string>();
+  const orphanCompounds = new Set<number>();
+
+  let currentChord: CharaChordFile["chords"][number] | undefined = undefined;
+  let compound: number | undefined = undefined;
+  let currentActions: number[] = [];
+  let invalidActions = false;
+  let invalidInput = false;
+  let chordFrom = 0;
+
+  const makeChordInput = (node: SyntaxNodeRef): number[] => {
+    invalidInput ||= !willBeValidChordInput(currentActions.length, !!compound);
+    const input = composeChordInput(currentActions, compound);
+    compound = hashChord(input);
+    if (!compoundInputs.has(compound)) {
+      compoundInputs.set(compound, data.doc.sliceString(chordFrom, node.from));
+      orphanCompounds.add(compound);
+    }
+    return input;
+  };
+
+  syntaxTree(data)
+    .cursor()
+    .iterate(
+      (node) => {
+        if (node.name === "Chord") {
+          currentChord = undefined;
+          compound = undefined;
+          invalidActions = false;
+          invalidInput = false;
+          chordFrom = node.from;
+        } else if (node.name === "ActionString") {
+          currentActions = [];
+        } else if (node.name === "HexNumber") {
+          const hexString = data.doc.sliceString(node.from, node.to);
+          const code = Number.parseInt(hexString, 16);
+          if (hexString.length === 10) {
+            if (compound !== undefined) {
+              invalidInput = true;
+            }
+            compound = code;
+          } else {
+            if (Number.isNaN(code) || code < 0 || code > 1023) {
+              invalidActions = true;
+            }
+            currentActions.push(code);
+          }
+        } else if (
+          node.name === "ActionId" ||
+          node.name === "SingleLetter" ||
+          node.name === "EscapedChar"
+        ) {
+          const id = data.doc.sliceString(node.from, node.to);
+          const code = ids.get(id)?.code;
+          if (code === undefined) {
+            invalidActions = true;
+            const encoder = new TextEncoder();
+            const bytes = encoder.encode(id);
+            for (let byte of bytes) {
+              currentActions.push(-byte);
+            }
+          } else {
+            currentActions.push(code);
+          }
+        }
+      },
+      (node) => {
+        if (node.name === "Chord" && currentChord !== undefined) {
+          if (currentChord !== undefined) {
+            currentChord[1] = currentActions;
+            const index = chords.length;
+            chords.push(currentChord);
+            const meta: ParseMeta = {
+              from: node.from,
+              to: node.to,
+              hasConcatenator: hasConcatenator(currentChord[1], codes),
+            };
+            if (invalidActions) {
+              meta.invalidActions = true;
+            }
+            if (invalidInput) {
+              meta.invalidInput = true;
+            }
+            metas.push(meta);
+            if (currentChord[1].length === 0) {
+              meta.emptyPhrase = true;
+            }
+            const key = JSON.stringify(currentChord[0]);
+            if (!meta.invalidInput) {
+              if (keys.has(key)) {
+                const targetIndex = keys.get(key)!;
+                const targetMeta = metas[targetIndex]!;
+                if (!targetMeta.overrides) targetMeta.overrides = [];
+                targetMeta.overrides.push(index);
+                meta.overriddenBy = targetIndex;
+              } else {
+                keys.set(key, index);
+              }
+            }
+            if (
+              meta.emptyPhrase ||
+              meta.invalidInput ||
+              meta.invalidActions ||
+              meta.overriddenBy !== undefined
+            ) {
+              meta.disabled = true;
+            }
+          }
+        } else if (node.name === "CompoundDelim") {
+          makeChordInput(node);
+        } else if (node.name === "PhraseDelim") {
+          const input = makeChordInput(node);
+          orphanCompounds.delete(hashChord(input));
+          currentChord = [input, []];
+        }
+      },
+    );
+
+  for (let i = 0; i < metas.length; i++) {
+    const [, compound] = splitCompound(chords[i]![0]);
+    if (
+      compound !== undefined &&
+      (!compoundInputs.has(compound) || orphanCompounds.has(compound))
+    ) {
+      metas[i]!.orphan = true;
+    }
+  }
+
+  console.timeEnd("parseCharaChords");
+
+  console.log(chords.length);
+  return { result: chords, meta: metas, compoundInputs };
+}
+
+class ChordRecord {
+  private chords = new Map<string, Set<string>>();
+
+  constructor(chords: CharaChordFile["chords"]) {
+    for (let chord of chords) {
+      const key = JSON.stringify(chord[0]);
+      if (!this.chords.has(key)) {
+        this.chords.set(key, new Set());
+      }
+      this.chords.get(key)!.add(JSON.stringify(chord));
+    }
+  }
+
+  static createDiff(
+    previous: CharaChordFile["chords"],
+    updated: CharaChordFile["chords"],
+  ) {
+    const deleted = new ChordRecord(previous);
+    const added = new ChordRecord(updated);
+    const dupA = deleted.duplicates(added);
+    const dupB = added.duplicates(deleted);
+    for (let chord of dupA) {
+      deleted.remove(chord);
+      added.remove(chord);
+    }
+    for (let chord of dupB) {
+      deleted.remove(chord);
+      added.remove(chord);
+    }
+    return { deleted, added };
+  }
+
+  duplicates(
+    other: ChordRecord,
+  ): IteratorObject<CharaChordFile["chords"][number]> {
+    const duplicates = new Set<string>();
+    for (let [key, chordSet] of this.chords) {
+      for (let chord of chordSet) {
+        if (other.hasInternal(key, chord)) {
+          duplicates.add(chord);
+        }
+      }
+    }
+    return duplicates
+      .values()
+      .map((it) => JSON.parse(it) as CharaChordFile["chords"][number]);
+  }
+
+  private hasInternal(key: string, chord: string): boolean {
+    return this.chords.get(key)?.has(chord) ?? false;
+  }
+
+  has(chord: CharaChordFile["chords"][number]): boolean {
+    return this.hasInternal(JSON.stringify(chord[0]), JSON.stringify(chord));
+  }
+
+  remove(chord: CharaChordFile["chords"][number]) {
+    const key = JSON.stringify(chord[0]);
+    const set = this.chords.get(key);
+    if (set) {
+      set.delete(JSON.stringify(chord));
+      if (set.size === 0) {
+        this.chords.delete(key);
+      }
+    }
+  }
+}
+
+export function syncChords(
+  previous: CharaChordFile["chords"],
+  updated: CharaChordFile["chords"],
+  state: EditorState,
+) {
+  const deviceDiff = ChordRecord.createDiff(previous, updated);
+  const current = parseCharaChords(state, get(KEYMAP_IDS));
+  // save initial device chords
+  // compare new device chords with initial device chords
+  // take changed/new/removed chords
+  // compare current editor chords with initial device chords
+  // compare two change sets
+  // apply removals if the chord didn't change on either end
+  // apply
+}
+
+export function rebaseUpdates(
+  updates: readonly Update[],
+  over: readonly { changes: ChangeDesc; clientID: string }[],
+) {
+  if (!over.length || !updates.length) return updates;
+  let changes: ChangeDesc | null = null,
+    skip = 0;
+  for (let update of over) {
+    let other = skip < updates.length ? updates[skip] : null;
+    if (other && other.clientID == update.clientID) {
+      if (changes) changes = changes.mapDesc(other.changes, true);
+      skip++;
+    } else {
+      changes = changes ? changes.composeDesc(update.changes) : update.changes;
+    }
+  }
+
+  if (skip) updates = updates.slice(skip);
+  return !changes
+    ? updates
+    : updates.map((update) => {
+        let updateChanges = update.changes.map(changes!);
+        changes = changes!.mapDesc(update.changes, true);
+        return {
+          changes: updateChanges,
+          effects:
+            update.effects && StateEffect.mapEffects(update.effects, changes!),
+          clientID: update.clientID,
+        };
+      });
+}
--- a/src/lib/chord-editor/autocomplete.ts
+++ b/src/lib/chord-editor/autocomplete.ts
@@ -0,0 +1,39 @@
+import {
+  EditorView,
+  ViewPlugin,
+  ViewUpdate,
+  type PluginValue,
+} from "@codemirror/view";
+import { syntaxTree } from "@codemirror/language";
+import type { EditorState } from "@codemirror/state";
+
+export function actionAutocompletePlugin(
+  query: (query: string | undefined) => void,
+) {
+  return ViewPlugin.fromClass(
+    class implements PluginValue {
+      constructor(readonly view: EditorView) {}
+
+      update(update: ViewUpdate) {
+        query(this.resolveAutocomplete(update.state));
+      }
+
+      resolveAutocomplete(state: EditorState): string | undefined {
+        if (state.selection.ranges.length !== 1) return;
+        const from = state.selection.ranges[0]!.from;
+        const to = state.selection.ranges[0]!.to;
+        if (from !== to) return;
+        const tree = syntaxTree(state);
+        const node = tree.resolveInner(from, -1).parent;
+        if (node?.name !== "ExplicitAction") return;
+        if (node.getChild("ExplicitDelimEnd")) return;
+        const queryNode = node.getChild("ExplicitDelimStart")?.nextSibling;
+        return (
+          (queryNode
+            ? state.doc.sliceString(queryNode.from, queryNode.to)
+            : undefined) || undefined
+        );
+      }
+    },
+  );
+}
--- a/src/lib/chord-editor/changes-plugin.ts
+++ b/src/lib/chord-editor/changes-plugin.ts
@@ -0,0 +1,17 @@
+import {
+  EditorView,
+  ViewPlugin,
+  ViewUpdate,
+  type PluginValue,
+} from "@codemirror/view";
+
+export const changesPlugin = ViewPlugin.fromClass(
+  class implements PluginValue {
+    constructor(readonly view: EditorView) {}
+
+    update(update: ViewUpdate) {}
+  },
+  {
+    eventHandlers: {},
+  },
+);
--- a/src/lib/chord-editor/chord-delim-plugin.ts
+++ b/src/lib/chord-editor/chord-delim-plugin.ts
@@ -0,0 +1,159 @@
+import {
+  Decoration,
+  EditorView,
+  ViewPlugin,
+  ViewUpdate,
+  WidgetType,
+} from "@codemirror/view";
+import { syntaxTree } from "@codemirror/language";
+import type { Range } from "@codemirror/state";
+import { mount, unmount } from "svelte";
+import Action from "../components/Action.svelte";
+import type { SyntaxNodeRef } from "@lezer/common";
+import classNames from "./concatenator-button.module.scss";
+
+export class DelimWidget extends WidgetType {
+  component?: {};
+  element?: HTMLElement;
+
+  constructor(readonly hasConcatenator: boolean) {
+    super();
+  }
+
+  override eq(other: DelimWidget) {
+    return this.hasConcatenator == other.hasConcatenator;
+  }
+
+  toDOM() {
+    if (!this.element) {
+      /*this.element = document.createElement("span");
+      this.element.innerHTML =
+        "&emsp;⇛" + (this.hasConcatenator ? "" : "&emsp;");
+      this.element.style.scale = "1.8";
+      this.element.style.color =
+        "color-mix(in srgb, currentColor 50%, transparent)";
+
+      if (this.hasConcatenator) {
+        const button = document.createElement("button");
+        button.className = classNames["concatenator-button"]!;
+        this.component = mount(Action, {
+          target: button,
+          props: { action: 574, display: "keys", inText: true, ghost: true },
+        });
+        this.element.appendChild(button);
+      }*/
+      this.element = document.createElement("div");
+      this.element.style.breakAfter = "column";
+    }
+    return this.element;
+  }
+
+  override ignoreEvent() {
+    return false;
+  }
+
+  override destroy() {
+    if (this.component) {
+      unmount(this.component);
+    }
+  }
+}
+
+function getJoinNode(
+  view: EditorView,
+  phraseDelimNode: SyntaxNodeRef,
+): SyntaxNodeRef | null | undefined {
+  const firstPhraseAction = phraseDelimNode.node.nextSibling
+    ?.getChild("ActionString")
+    ?.node.firstChild?.node.getChild("ExplicitAction");
+  const idNode = firstPhraseAction?.node.getChild("ActionId");
+  const actionId = idNode
+    ? view.state.doc.sliceString(idNode.from, idNode.to)
+    : null;
+  const isJoinAction =
+    actionId === "JOIN" &&
+    !!firstPhraseAction!.node.getChild("ExplicitDelimEnd");
+  return isJoinAction ? firstPhraseAction : null;
+}
+
+function actionWidgets(view: EditorView) {
+  const widgets: Range<Decoration>[] = [];
+  for (const { from, to } of view.visibleRanges) {
+    syntaxTree(view.state).iterate({
+      from,
+      to,
+      enter: (node) => {
+        if (node.name !== "PhraseDelim") return;
+        const joinNode = getJoinNode(view, node);
+
+        let deco = Decoration.replace({
+          widget: new DelimWidget(!joinNode),
+        });
+        widgets.push(deco.range(node.from, node.to));
+      },
+    });
+  }
+  return Decoration.set(widgets);
+}
+
+export const delimPlugin = ViewPlugin.fromClass(
+  class {
+    decorations = Decoration.none;
+
+    constructor(view: EditorView) {
+      this.decorations = actionWidgets(view);
+    }
+
+    update(update: ViewUpdate) {
+      if (
+        update.docChanged ||
+        update.viewportChanged ||
+        syntaxTree(update.startState) != syntaxTree(update.state)
+      )
+        this.decorations = actionWidgets(update.view);
+    }
+  },
+  {
+    decorations(instance) {
+      return instance.decorations;
+    },
+    provide(plugin) {
+      return EditorView.atomicRanges.of(
+        (view) => view.plugin(plugin)?.decorations ?? Decoration.none,
+      );
+    },
+    eventHandlers: {
+      click: (event, view) => {
+        if (!(event.target instanceof HTMLElement)) return;
+        if (
+          !(
+            event.target instanceof HTMLButtonElement ||
+            (event.target as HTMLElement).parentElement instanceof
+              HTMLButtonElement
+          )
+        )
+          return;
+
+        const chordNode = syntaxTree(view.state).resolve(
+          view.posAtDOM(event.target),
+        );
+        const delimNode = (
+          chordNode.name === "ActionString"
+            ? chordNode.parent?.parent
+            : chordNode
+        )?.getChild("PhraseDelim");
+        if (!delimNode) return;
+        const joinNode = getJoinNode(view, delimNode);
+        if (!event.target.checked && !joinNode) {
+          view.dispatch({
+            changes: {
+              from: delimNode.to,
+              insert: "<JOIN>",
+            },
+            selection: { anchor: delimNode.to + "<JOIN>".length },
+          });
+        }
+      },
+    },
+  },
+);
--- a/src/lib/chord-editor/chord-sync-plugin.ts
+++ b/src/lib/chord-editor/chord-sync-plugin.ts
@@ -0,0 +1,25 @@
+import type { CharaChordFile } from "$lib/share/chara-file";
+import { StateEffect, StateField } from "@codemirror/state";
+
+export const chordSyncEffect = StateEffect.define<CharaChordFile["chords"]>();
+
+export const deviceChordField = StateField.define<CharaChordFile["chords"]>({
+  create() {
+    return [];
+  },
+  update(value, transaction) {
+    return (
+      transaction.effects.findLast((it) => it.is(chordSyncEffect))?.value ??
+      value
+    );
+  },
+  compare(a, b) {
+    return JSON.stringify(a) === JSON.stringify(b);
+  },
+  toJSON(value) {
+    return value;
+  },
+  fromJSON(value) {
+    return value;
+  },
+});
--- a/src/lib/chord-editor/chords-grammar-plugin.ts
+++ b/src/lib/chord-editor/chords-grammar-plugin.ts
@@ -0,0 +1,54 @@
+import { parser } from "./chords.grammar";
+import {
+  LRLanguage,
+  LanguageSupport,
+  HighlightStyle,
+} from "@codemirror/language";
+import { styleTags, tags } from "@lezer/highlight";
+
+export const chordHighlightStyle = HighlightStyle.define([
+  {
+    tag: tags.keyword,
+    paddingInline: "2px",
+    opacity: "0.5",
+  },
+  {
+    tag: tags.className,
+    backgroundColor:
+      "color-mix(in srgb, var(--md-sys-color-surface-variant) 50%, transparent)",
+    borderRadius: "4px",
+    paddingInline: "4px",
+    marginInline: "-4px",
+  },
+  {
+    tag: tags.integer,
+    color: "var(--md-sys-color-tertiary)",
+  },
+  {
+    tag: tags.angleBracket,
+    opacity: "0.5",
+  },
+  { tag: tags.modifier, opacity: "0.25" },
+  { tag: tags.escape, color: "var(--md-sys-color-primary)" },
+  { tag: tags.strong, fontWeight: "bold" },
+]);
+
+export const chordLanguage = LRLanguage.define({
+  name: "chords",
+  parser: parser.configure({
+    props: [
+      styleTags({
+        "PhraseDelim CompoundDelim": [tags.keyword, tags.strong],
+        "HexNumber DecimalNumber": [tags.className, tags.integer],
+        "ExplicitDelimStart ExplicitDelimEnd": tags.angleBracket,
+        ActionId: tags.className,
+        EscapedLetter: tags.escape,
+        Escape: [tags.escape, tags.modifier],
+      }),
+    ],
+  }),
+});
+
+export function chordLanguageSupport() {
+  return new LanguageSupport(chordLanguage, [chordLanguage.data.of({})]);
+}
--- a/src/lib/chord-editor/chords.grammar
+++ b/src/lib/chord-editor/chords.grammar
@@ -0,0 +1,26 @@
+@top Program { Chord* }
+
+ExplicitAction { ExplicitDelimStart (HexNumber | ActionId) ExplicitDelimEnd }
+EscapedSingleAction { Escape EscapedLetter }
+Action { SingleLetter | ExplicitAction | EscapedSingleAction }
+ActionString { Action* }
+ChordInput { (ActionString CompoundDelim)* ActionString }
+ChordPhrase { ActionString }
+Chord { ChordInput PhraseDelim ChordPhrase ChordDelim }
+
+@tokens {
+  @precedence {HexNumber}
+  @precedence {CompoundDelim, PhraseDelim, ExplicitDelimStart, ChordDelim, SingleLetter}
+  @precedence {EscapedLetter}
+  ExplicitDelimStart {"<"}
+  ExplicitDelimEnd {">"}
+  CompoundDelim {"|"}
+  PhraseDelim {"=>"}
+  Escape { "\\" }
+  HexNumber { "0x" $[a-fA-F0-9]+ }
+  ActionId { $[a-zA-Z_]$[a-zA-Z0-9_]* }
+  SingleLetter { ![\\] }
+  EscapedLetter { ![] }
+  ChordDelim { ($[\n] | @eof) }
+}
+
--- a/src/lib/chord-editor/concatenator-button.module.scss
+++ b/src/lib/chord-editor/concatenator-button.module.scss
@@ -0,0 +1,13 @@
+.concatenator-button {
+  display: inline;
+  opacity: calc(var(--auto-space-show, 0) * 0.7);
+  margin: 0;
+  padding: 4px;
+  height: auto;
+
+  > :global(kbd) {
+    outline: 1px dashed var(--md-sys-color-outline);
+    outline-offset: -1px;
+    background: none;
+  }
+}
--- a/src/lib/chord-editor/grammar.d.ts
+++ b/src/lib/chord-editor/grammar.d.ts
@@ -0,0 +1,3 @@
+declare module "*.grammar" {
+  export const parser: import("@lezer/lr").LRParser;
+}
--- a/src/lib/chord-editor/parsed-chords-plugin.ts
+++ b/src/lib/chord-editor/parsed-chords-plugin.ts
@@ -0,0 +1,102 @@
+import {
+  ChangeDesc,
+  StateEffect,
+  StateField,
+  type Extension,
+} from "@codemirror/state";
+import { parseCharaChords, type ParseResult } from "./action-serializer";
+import { type KeyInfo } from "$lib/serial/keymap-codes";
+import { actionMetaPlugin } from "./action-meta-plugin";
+import { EditorView, ViewPlugin, ViewUpdate } from "@codemirror/view";
+import type { Tree } from "@lezer/common";
+import { syntaxParserRunning, syntaxTree } from "@codemirror/language";
+import { debounceTime, Subject } from "rxjs";
+import { forceLinting } from "@codemirror/lint";
+
+function mapParseResult(value: ParseResult, change: ChangeDesc): ParseResult {
+  if (change.empty) return value;
+  if (
+    value.meta.every(
+      (it) =>
+        change.mapPos(it.to) === it.to && change.mapPos(it.from) === it.from,
+    )
+  )
+    return value;
+  return {
+    result: value.result,
+    meta: value.meta.map((it) => ({
+      ...it,
+      from: change.mapPos(it.from),
+      to: change.mapPos(it.to),
+    })),
+    compoundInputs: value.compoundInputs,
+  };
+}
+
+export const parsedChordsEffect = StateEffect.define<ParseResult>({
+  map: mapParseResult,
+});
+
+export const parsedChordsField = StateField.define<ParseResult>({
+  create() {
+    return { compoundInputs: new Map(), meta: [], result: [] };
+  },
+  update(value, transaction) {
+    return (
+      transaction.effects.findLast((it) => it.is(parsedChordsEffect))?.value ??
+      mapParseResult(value, transaction.changes)
+    );
+  },
+});
+
+export function parsedChordsPlugin(debounce = 200): Extension {
+  const plugin = ViewPlugin.fromClass(
+    class {
+      tree: Tree;
+      ids: Map<string, KeyInfo>;
+      codes: Map<number, KeyInfo>;
+
+      needsUpdate = new Subject<void>();
+      subscription = this.needsUpdate
+        .pipe(debounceTime(debounce))
+        .subscribe(() => {
+          if (syntaxParserRunning(this.view)) {
+            this.needsUpdate.next();
+            return;
+          }
+          requestIdleCallback(() => {
+            this.view.dispatch({
+              effects: parsedChordsEffect.of(
+                parseCharaChords(this.view.state, this.ids, this.codes),
+              ),
+            });
+            forceLinting(this.view);
+          });
+        });
+
+      constructor(readonly view: EditorView) {
+        this.tree = syntaxTree(view.state);
+        this.ids = view.state.field(actionMetaPlugin.field).ids;
+        this.codes = view.state.field(actionMetaPlugin.field).codes;
+        this.needsUpdate.next();
+      }
+
+      update(update: ViewUpdate) {
+        const tree = syntaxTree(update.state);
+        const ids = update.state.field(actionMetaPlugin.field).ids;
+        const codes = update.state.field(actionMetaPlugin.field).codes;
+        if (tree !== this.tree || ids !== this.ids || codes !== this.codes) {
+          this.tree = tree;
+          this.ids = ids;
+          this.codes = codes;
+          this.needsUpdate.next();
+        }
+      }
+
+      destroy() {
+        this.subscription.unsubscribe();
+      }
+    },
+  );
+  return [parsedChordsField, plugin];
+}
--- a/src/lib/chord-editor/persistent-state-plugin.ts
+++ b/src/lib/chord-editor/persistent-state-plugin.ts
@@ -0,0 +1,122 @@
+import {
+  EditorView,
+  highlightActiveLine,
+  keymap,
+  lineNumbers,
+  ViewPlugin,
+  ViewUpdate,
+} from "@codemirror/view";
+import {
+  history,
+  historyField,
+  historyKeymap,
+  standardKeymap,
+} from "@codemirror/commands";
+import { debounceTime, Subject } from "rxjs";
+import { EditorState, type EditorStateConfig } from "@codemirror/state";
+import { lintGutter } from "@codemirror/lint";
+import {
+  chordHighlightStyle,
+  chordLanguageSupport,
+} from "./chords-grammar-plugin";
+import { actionLinter } from "./action-linter";
+import { actionAutocompletePlugin } from "./autocomplete";
+import { delimPlugin } from "./chord-delim-plugin";
+import { actionPlugin } from "./action-plugin";
+import { syntaxHighlighting } from "@codemirror/language";
+import { deviceChordField } from "./chord-sync-plugin";
+import { actionMetaPlugin } from "./action-meta-plugin";
+import { parsedChordsPlugin } from "./parsed-chords-plugin";
+
+const serializedFields = {
+  history: historyField,
+  deviceChords: deviceChordField,
+};
+
+export interface EditorConfig {
+  rawCode?: boolean;
+  storeName: string;
+  autocomplete(query: string | undefined): void;
+}
+
+export function loadPersistentState(params: EditorConfig): EditorState {
+  const stored = localStorage.getItem(params.storeName);
+  const config = {
+    extensions: [
+      actionMetaPlugin.plugin,
+      deviceChordField,
+      parsedChordsPlugin(),
+      lintGutter(),
+      params.rawCode ? [lineNumbers()] : [delimPlugin, actionPlugin],
+      chordLanguageSupport(),
+      actionLinter({
+        delay: 100,
+        markerFilter(diagnostics) {
+          return diagnostics.filter((it) => it.from !== it.to);
+        },
+      }),
+      actionAutocompletePlugin(params.autocomplete),
+      persistentStatePlugin(params.storeName),
+      history(),
+      syntaxHighlighting(chordHighlightStyle),
+      highlightActiveLine(),
+      EditorView.theme({
+        ".cm-line": {
+          borderBottom: "1px solid transparent",
+          caretColor: "var(--md-sys-color-on-surface)",
+        },
+        ".cm-scroller": {
+          overflow: "auto",
+          width: "100%",
+          fontFamily: "inherit !important",
+          gap: "8px",
+        },
+        ".cm-content": {
+          flex: 1,
+        },
+        ".cm-cursor": {
+          borderColor: "var(--md-sys-color-on-surface)",
+        },
+      }),
+      keymap.of([...standardKeymap, ...historyKeymap]),
+    ],
+  } satisfies EditorStateConfig;
+
+  if (stored) {
+    try {
+      const parsed = JSON.parse(stored);
+      return EditorState.fromJSON(parsed, config, serializedFields);
+    } catch (e) {
+      console.error("Failed to parse persistent state:", e);
+    }
+  }
+  return EditorState.create(config);
+}
+
+export function persistentStatePlugin(storeName: string) {
+  return ViewPlugin.fromClass(
+    class {
+      updateSubject = new Subject<void>();
+      subscription = this.updateSubject
+        .pipe(debounceTime(500))
+        .subscribe(() => {
+          localStorage.setItem(
+            storeName,
+            JSON.stringify(this.view.state.toJSON(serializedFields)),
+          );
+        });
+
+      constructor(readonly view: EditorView) {}
+
+      update(update: ViewUpdate) {
+        if (update.state !== update.startState) {
+          this.updateSubject.next();
+        }
+      }
+
+      destroy() {
+        this.subscription.unsubscribe();
+      }
+    },
+  );
+}
--- a/src/lib/chord-editor/store-state-field.ts
+++ b/src/lib/chord-editor/store-state-field.ts
@@ -0,0 +1,35 @@
+import { StateEffect, StateField } from "@codemirror/state";
+import { EditorView, ViewPlugin } from "@codemirror/view";
+import { get, type Readable } from "svelte/store";
+
+export function reactiveStateField<T>(store: Readable<T>) {
+  const effect = StateEffect.define<T>();
+  const field = StateField.define<T>({
+    create() {
+      return get(store);
+    },
+    update(value, transaction) {
+      return (
+        transaction.effects.findLast((it) => it.is(effect))?.value ?? value
+      );
+    },
+  });
+  const plugin = ViewPlugin.fromClass(
+    class {
+      unsubscribe: () => void;
+
+      constructor(readonly view: EditorView) {
+        this.unsubscribe = store.subscribe((value) => {
+          setTimeout(() => {
+            view.dispatch({ effects: effect.of(value) });
+          });
+        });
+      }
+
+      destroy() {
+        this.unsubscribe();
+      }
+    },
+  );
+  return { field, plugin: [field, plugin] };
+}
--- a/src/lib/chord-editor/test.txt
+++ b/src/lib/chord-editor/test.txt
@@ -0,0 +1,16 @@
+a|.=<LEFT_SHIFT>=>t=t
+;ims=<0x219><IMPULSE>
+-;<KSC_2C><LEFT_SHIFT>=><0x23e>_<0x23e>
+.;g=><0x23e>...<0x23e><LH_THUMB_3_3D>
+'dg=><0x23e>'<0x23e>
+'gl=><0x23e>'ll<0x23e>
+'ar=><0x23e>'re<0x23e>
+'gs=><0x23e>'s<0x23e>
+'ev=><0x23e>'ve<0x23e>
+<SPACE>-;=><0x23e><0x223>-<0x223><KSC_00>
+<SPACE>;<LEFT_SHIFT>=><0x23e><0x223><0x23d><0x223><KSC_00>
+<SPACE>;g=><0x23e><0x223><SPACE><0x223><KSC_00>
+deg=><0x23e>ed<0x23e>
+;gr=><0x23e>er<0x23e>
+;es=><0x23e>es<0x23e>
+;est=><0x23e>est<0x23e>
--- a/src/lib/components/Action.svelte
+++ b/src/lib/components/Action.svelte
@@ -1,94 +1,245 @@
 <script lang="ts">
-  import { KEYMAP_CODES } from "$lib/serial/keymap-codes";
+  import { KEYMAP_CODES, KEYMAP_IDS } from "$lib/serial/keymap-codes";
  import type { KeyInfo } from "$lib/serial/keymap-codes";
-  import { action as title } from "$lib/title";
  import { osLayout } from "$lib/os-layout";
+  import { isVerbose } from "./verbose-action";
+  import { actionTooltip } from "$lib/title";

  let {
    action,
    display,
-  }: { action: number | KeyInfo; display: "inline-keys" | "keys" } = $props();
+    ignoreIcon = false,
+    inText = false,
+  }: {
+    action: string | number | KeyInfo;
+    display: "inline-keys" | "keys" | "verbose";
+    ignoreIcon?: boolean;
+    inText?: boolean;
+  } = $props();

-  let info = $derived(
+  let retrievedInfo = $derived(
    typeof action === "number"
-      ? ($KEYMAP_CODES.get(action) ?? { code: action })
-      : action,
+      ? $KEYMAP_CODES.get(action)
+      : typeof action === "string"
+        ? $KEYMAP_IDS.get(action)
+        : action,
  );
+  let info = $derived(
+    retrievedInfo ??
+      (typeof action === "number"
+        ? ({ code: action } satisfies KeyInfo)
+        : typeof action === "string"
+          ? ({ code: 1024, id: action } satisfies KeyInfo)
+          : action),
+  );
+  let icon = $derived(ignoreIcon ? undefined : info.icon);
  let dynamicMapping = $derived(info.keyCode && $osLayout.get(info.keyCode));
-
-  let tooltip = $derived(
-    `&lt;${info.id ?? `0x${info.code.toString(16)}`}&gt; ` +
-      (info.title ?? "") +
-      (info.variant === "left"
-        ? " (left)"
-        : info.variant === "right"
-          ? " (right)"
-          : ""),
+  let hasPopover = $derived(
+    !retrievedInfo || !info.id || info.title || info.description,
  );
 </script>

-{#if display === "keys"}
+{#snippet popover()}
+  {#if retrievedInfo}
+    {#if info.icon || info.display || !info.id}
+      &lt;<b>{info.id ?? `0x${info.code.toString(16)}`}</b>&gt;
+    {/if}
+    {#if info.title}
+      {info.title}
+    {/if}
+    {#if info.variant === "left"}
+      (Left)
+    {:else if info.variant === "right"}
+      (Right)
+    {/if}
+    {#if info.description}
+      <br />
+      <small>{info.description}</small>
+    {/if}
+  {:else}
+    <b>Unknown Action</b><br />
+    {#if info.code > 1023}
+      This action cannot be translated and will be ingored.
+    {/if}
+  {/if}
+{/snippet}
+
+{#snippet kbdText()}
+  {dynamicMapping ??
+    icon ??
+    info.display ??
+    info.id ??
+    `0x${info.code.toString(16)}`}
+{/snippet}
+{#snippet kbdSnippet(withPopover = true)}
  <kbd
-    class:icon={!!info.icon}
+    class:in-text={inText}
+    class:icon={!!icon}
    class:left={info.variant === "left"}
    class:right={info.variant === "right"}
-    use:title={{ title: tooltip }}
+    class:error={info.code > 1023}
+    class:warn={!retrievedInfo}
+    {@attach withPopover && hasPopover ? actionTooltip(popover) : null}
  >
-    {dynamicMapping ??
-      info.icon ??
-      info.display ??
-      info.id ??
-      `0x${info.code.toString(16)}`}
+    {@render kbdText()}
  </kbd>
-{:else if display === "inline-keys"}
+{/snippet}
+{#snippet inlineKbdSnippet()}
  {#if !info.icon && dynamicMapping?.length === 1}
    <span
-      use:title={{ title: tooltip }}
+      {@attach hasPopover ? actionTooltip(popover) : null}
+      class:in-text={inText}
+      class:error={info.code > 1023}
+      class:warn={!retrievedInfo}
      class:left={info.variant === "left"}
      class:right={info.variant === "right"}>{dynamicMapping}</span
    >
-  {:else if !info.icon && info.id?.length === 1}
+  {:else if !icon && info.id?.length === 1}
    <span
-      use:title={{ title: tooltip }}
+      {@attach hasPopover ? actionTooltip(popover) : null}
+      class:in-text={inText}
+      class:error={info.code > 1023}
+      class:warn={!retrievedInfo}
      class:left={info.variant === "left"}
      class:right={info.variant === "right"}>{info.id}</span
    >
  {:else}
    <kbd
      class="inline-kbd"
+      class:in-text={inText}
      class:left={info.variant === "left"}
      class:right={info.variant === "right"}
-      class:icon={!!info.icon}
-      use:title={{ title: tooltip }}
-    >
-      {dynamicMapping ??
-        info.icon ??
-        info.display ??
-        info.id ??
-        `0x${info.code.toString(16)}`}</kbd
+      class:icon={!!icon}
+      class:warn={!retrievedInfo}
+      class:error={info.code > 1023}
+      {@attach hasPopover ? actionTooltip(popover) : null}
    >
+      {@render kbdText()}
+    </kbd>
  {/if}
+{/snippet}
+
+{#if display === "keys"}
+  {@render kbdSnippet()}
+{:else if display === "verbose"}
+  {#if isVerbose(info)}
+    <div class="verbose" {@attach hasPopover ? actionTooltip(popover) : null}>
+      {@render kbdSnippet(false)}
+      <div class="verbose-title">{info.title}</div>
+    </div>
+  {:else}
+    {@render inlineKbdSnippet()}
+  {/if}
+{:else if display === "inline-keys" || display === "inline-text"}
+  {@render inlineKbdSnippet()}
 {/if}

 <style lang="scss">
  kbd:not(.inline-kbd) {
-    height: 24px;
-    padding-block: auto;
    transition: color 250ms ease;
+    padding-block: auto;
+    height: 24px;
+
+    &.in-text {
+      display: inline-flex;
+      vertical-align: middle;
+      margin-block: auto;
+      padding-block: revert;
+    }
  }

+  .warn:not(.error) {
+    border-color: var(--md-sys-color-error);
+    color: var(--md-sys-color-error);
+  }
+
+  .error {
+    opacity: 0.6;
+    text-decoration: line-through;
+  }
+
+  $variant-color: color-mix(
+    in srgb,
+    var(--md-sys-color-on-surface) 50%,
+    transparent
+  );
+
+  .left,
+  .right {
+    background-color: transparent;
+
+    &::before {
+      position: absolute;
+      inset: 0;
+      outline: 2px dashed
+        color-mix(in srgb, var(--bg-color), var(--md-sys-color-outline) 40%);
+      outline-offset: -2px;
+      border-radius: var(--border-radius);
+      content: "";
+    }
+  }
+
+  $cutoff: 60%;
+
  .left {
-    border-left-width: 3px;
+    background-image: linear-gradient(
+      to right,
+      var(--bg-color) $cutoff,
+      transparent $cutoff
+    );
+
+    &::before {
+      clip-path: inset(0 0 0 $cutoff);
+    }
  }
  .right {
-    border-right-width: 3px;
+    background-image: linear-gradient(
+      to left,
+      var(--bg-color) $cutoff,
+      transparent $cutoff
+    );
+
+    &::before {
+      clip-path: inset(0 $cutoff 0 0);
+    }
  }

  .inline-kbd {
    margin-inline-end: 2px;
+
+    &.in-text.icon {
+      translate: 0 -4em;
+    }
  }

  :global(span) + .inline-kbd {
    margin-inline-start: 2px;
  }
+
+  .verbose {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    margin-inline: 2px;
+    min-width: 160px;
+    height: 32px;
+
+    kbd {
+      justify-content: flex-start;
+    }
+
+    .verbose-title {
+      display: -webkit-box;
+      opacity: 0.9;
+      max-width: 15ch;
+      overflow: hidden;
+      font-style: italic;
+      font-size: 12px;
+      text-align: left;
+      text-overflow: ellipsis;
+      -webkit-line-clamp: 2; /* number of lines to show */
+      line-clamp: 2;
+      -webkit-box-orient: vertical;
+    }
+  }
 </style>
--- a/src/lib/components/ActionListItem.svelte
+++ b/src/lib/components/ActionListItem.svelte
@@ -48,33 +48,33 @@
 <style lang="scss">
  button {
    display: flex;
-    gap: 4px;
    align-items: center;
+    gap: 4px;
+    margin: 0;
+    border-radius: 8px;
+    padding: 8px;

    width: 100%;
    height: auto;
-    margin: 0;
-    padding: 8px;

    font-family: "Noto Sans Mono", monospace;
-    border-radius: 8px;

    @media not (forced-colors: active) {
-      color: inherit;
-
-      background: transparent;
      border: none;

+      background: transparent;
+      color: inherit;
+
      &:focus-visible {
-        color: var(--md-sys-color-on-surface-variant);
-        background: var(--md-sys-color-surface-variant);
        outline: none;
+        background: var(--md-sys-color-surface-variant);
+        color: var(--md-sys-color-on-surface-variant);
      }
    }

    @media (forced-colors: active) {
-      border: 1px solid ButtonBorder;
      margin-block: 4px;
+      border: 1px solid ButtonBorder;

      &:hover {
        color: ActiveText;
@@ -86,8 +86,8 @@
    display: flex;
    flex: 1;
    flex-direction: column;
-    align-items: flex-start;
    justify-content: flex-start;
+    align-items: flex-start;

    text-align: start;
  }
--- a/src/lib/components/AnimatedNumber.svelte
+++ b/src/lib/components/AnimatedNumber.svelte
@@ -1,5 +1,5 @@
 <script lang="ts">
-  import { fade, slide } from "svelte/transition";
+  import { fade } from "svelte/transition";

  let { value }: { value: number } = $props();

@@ -29,15 +29,15 @@

 <style lang="scss">
  .digits {
-    position: relative;
    display: inline-block;
+    position: relative;
    transition: width 500ms ease;
  }

  .digit-wrapper {
    display: inline-grid;
-    height: 1em;
    width: 1ch;
+    height: 1em;
  }

  .digit {
--- a/src/lib/components/PwaStatus.svelte
+++ b/src/lib/components/PwaStatus.svelte
@@ -16,8 +16,8 @@
 <style lang="scss">
  button {
    cursor: pointer;
-    color: var(--md-sys-color-on-background);
-    background: transparent;
    border: none;
+    background: transparent;
+    color: var(--md-sys-color-on-background);
  }
 </style>
--- a/src/lib/components/Terminal.svelte
+++ b/src/lib/components/Terminal.svelte
@@ -1,10 +1,15 @@
 <script lang="ts">
  import { serialLog, serialPort } from "$lib/serial/connection";
+  import { onMount } from "svelte";
  import { slide } from "svelte/transition";

+  onMount(() => {
+    io.scrollTo({ top: io.scrollHeight });
+  });
+
  function submit(event: Event) {
    event.preventDefault();
-    $serialPort?.send(0, value.trim());
+    $serialPort?.send(0, [value.trim()]);
    value = "";
    io.scrollTo({ top: io.scrollHeight });
  }
@@ -33,63 +38,61 @@

 <style lang="scss">
  form {
+    display: flex;
    position: relative;
+    flex-direction: column;

    contain: strict;
-    overflow: hidden;
-    display: flex;
-    flex-direction: column;
+
+    border-radius: 16px;

    width: 100%;
    height: 100%;
+    overflow: hidden;
+    color: var(--md-sys-color-on-secondary);
+    font-size: 0.75rem;

    font-family: "Noto Sans Mono", monospace;
-    font-size: 0.75rem;
-    color: var(--md-sys-color-on-secondary);
-
-    border-radius: 16px;
  }

  fieldset::before {
-    content: "$";
-
    position: absolute;
    bottom: 8px;
    left: 8px;
+    content: "$";

    font-weight: 900;
  }

  input {
-    width: 100%;
+    appearance: none;
    margin-block-start: -16px;
+    border: none;
+    background: var(--md-sys-color-secondary);
    padding: 8px;
-    padding-block-start: 24px;
    padding-inline-start: calc(8px + 1.5ch);
+    padding-block-start: 24px;
+    width: 100%;
+    color: var(--md-sys-color-on-secondary);
+    font-weight: 600;

    font-family: "Noto Sans Mono", monospace;
-    font-weight: 600;
-    color: var(--md-sys-color-on-secondary);
-
-    appearance: none;
-    background: var(--md-sys-color-secondary);
-    border: none;
  }

  .io {
    --scrollbar-color: var(--md-sys-color-secondary);
+    flex: 1;

    z-index: 1;
+    border-radius: 0 0 16px 16px;

-    overflow-y: auto;
-    flex: 1;
+    background: var(--md-sys-color-secondary-container);

    padding: 12px;

-    color: var(--md-sys-color-on-secondary-container);
+    overflow-y: auto;

-    background: var(--md-sys-color-secondary-container);
-    border-radius: 0 0 16px 16px;
+    color: var(--md-sys-color-on-secondary-container);
  }

  :focus-visible {
@@ -99,10 +102,10 @@
  fieldset {
    all: unset;

-    position: relative;
-
    display: block;

+    position: relative;
+
    opacity: 0.8;

    transition: opacity 250ms ease;
@@ -113,16 +116,16 @@
  }

  .anchor {
-    overflow-anchor: auto;
    height: 1px;
+    overflow-anchor: auto;
  }

  code,
  samp,
  p {
    display: block;
-    overflow-anchor: none;
    margin-block: 0.15rem;
+    overflow-anchor: none;
  }

  p {
@@ -130,24 +133,24 @@
    justify-content: center;

    margin-block-end: 1rem;
+    border-radius: 8px;
+
+    background: var(--md-sys-color-secondary);
    padding: 0.25rem;

    color: var(--md-sys-color-on-secondary);
-
-    background: var(--md-sys-color-secondary);
-    border-radius: 8px;
  }

  code::before {
-    content: "> ";
    margin-block-end: 0.25rem;
-    font-weight: 900;
+    content: "> ";
    color: var(--md-sys-color-primary);
+    font-weight: 900;
  }

  ::selection {
-    color: var(--md-sys-color-background);
    background: var(--md-sys-color-on-background);
+    color: var(--md-sys-color-background);
  }

  @keyframes blink {
--- a/src/lib/components/Tooltip.svelte
+++ b/src/lib/components/Tooltip.svelte
@@ -1,9 +1,14 @@
 <script lang="ts">
-  let { title, shortcut }: { title?: string; shortcut?: string } = $props();
+  import type { Snippet } from "svelte";
+
+  let { title, shortcut }: { title?: string | Snippet; shortcut?: string } =
+    $props();
 </script>

-{#if title}
+{#if typeof title === "string"}
  <p>{@html title}</p>
+{:else}
+  {@render title?.()}
 {/if}

 {#if shortcut}
@@ -20,8 +25,8 @@

    :global(kbd.icon) {
      display: inline-flex;
-      font-size: inherit;
      translate: 0 0.2em;
+      font-size: inherit;
    }
  }
 </style>
--- a/src/lib/components/layout/ActionList.svelte
+++ b/src/lib/components/layout/ActionList.svelte
@@ -0,0 +1,370 @@
+<script lang="ts">
+  import {
+    KEYMAP_CATEGORIES,
+    KEYMAP_CODES,
+    KEYMAP_IDS,
+    type KeyInfo,
+  } from "$lib/serial/keymap-codes";
+  import FlexSearch from "flexsearch";
+  import { onMount } from "svelte";
+  import ActionListItem from "$lib/components/ActionListItem.svelte";
+  import LL from "$i18n/i18n-svelte";
+  import { actionTooltip } from "$lib/title";
+  import { get } from "svelte/store";
+  import type { KeymapCategory } from "$lib/meta/types/actions";
+  import Action from "../Action.svelte";
+  import { isVerbose } from "../verbose-action";
+  import { actionToValue } from "$lib/chord-editor/action-serializer";
+
+  let {
+    currentAction = undefined,
+    nextAction = undefined,
+    queryFilter = undefined,
+    ignoreIcon,
+    autofocus = false,
+    onselect,
+    onclose,
+  }: {
+    currentAction?: number;
+    queryFilter?: string;
+    nextAction?: number;
+    autofocus?: boolean;
+    ignoreIcon?: boolean;
+    onselect?: (id: number) => void;
+    onclose?: () => void;
+  } = $props();
+
+  onMount(() => {
+    search();
+    if (autofocus) {
+      searchBox.focus();
+    }
+  });
+
+  const index = new FlexSearch.Index({ tokenize: "full" });
+
+  $effect(() => {
+    createIndex($KEYMAP_CODES);
+  });
+
+  let didClear = true;
+  $effect(() => {
+    if (queryFilter !== undefined || !didClear) {
+      searchBox.value = queryFilter ?? "";
+      search();
+    }
+  });
+
+  async function createIndex(codes: Map<number, KeyInfo>) {
+    for (const [, action] of codes) {
+      await index?.addAsync(
+        action.code,
+        `${action.title || ""} ${action.variant || ""} ${action.category} ${action.id || ""} ${
+          action.description || ""
+        }`,
+      );
+    }
+  }
+
+  async function search() {
+    const groups = new Map(
+      $KEYMAP_CATEGORIES.map(
+        (category) => [category, []] as [KeymapCategory, KeyInfo[]],
+      ),
+    );
+    didClear = searchBox.value === "";
+    const result =
+      searchBox.value === ""
+        ? Array.from($KEYMAP_CODES.keys())
+        : await index!.searchAsync(searchBox.value);
+    for (const id of result) {
+      const action = $KEYMAP_CODES.get(id as number);
+      if (action?.category) {
+        groups.get(action.category)?.push(action);
+      }
+    }
+
+    function sortValue(action: KeyInfo): number {
+      return isVerbose(action) ? 0 : action.id?.length === 1 ? 2 : 1;
+    }
+    for (const actions of groups.values()) {
+      actions.sort((a, b) => sortValue(b) - sortValue(a));
+    }
+    results = groups;
+    exact = get(KEYMAP_IDS).get(searchBox.value)?.code;
+    code = Number(searchBox.value);
+  }
+
+  function select(id?: number) {
+    if (id !== undefined) {
+      onselect?.(id);
+    }
+  }
+
+  function keyboardNavigation(event: KeyboardEvent) {
+    if (event.shiftKey && event.key === "Enter" && exact !== undefined) {
+      onselect?.(exact);
+    } else if (event.key === "ArrowDown") {
+      const element =
+        resultList.querySelector("li:focus-within")?.nextSibling ??
+        resultList.querySelector("li:not(.exact)");
+      if (element instanceof HTMLLIElement) {
+        element.querySelector("button")?.focus();
+      }
+    } else if (event.key === "ArrowUp") {
+      const element =
+        resultList.querySelector("li:focus-within")?.previousSibling ??
+        resultList.querySelector("li:not(.exact)");
+      if (element instanceof HTMLLIElement) {
+        element.querySelector("button")?.focus();
+      }
+    } else {
+      searchBox.focus();
+      return;
+    }
+    event.preventDefault();
+  }
+
+  let results: Map<KeymapCategory, KeyInfo[]> = $state(new Map());
+  let exact: number | undefined = $state(undefined);
+  let code: number = $state(Number.NaN);
+
+  let searchBox: HTMLInputElement;
+  let resultList: HTMLUListElement;
+</script>
+
+<div class="content">
+  <div class="search-row">
+    <!-- svelte-ignore a11y_autofocus -->
+    <input
+      type="search"
+      bind:this={searchBox}
+      oninput={search}
+      onkeypress={keyboardNavigation}
+      placeholder={$LL.actionSearch.PLACEHOLDER()}
+    />
+    {#if onclose}
+      <button onclick={() => select(0)} {@attach actionTooltip("", "shift+esc")}
+        >{$LL.actionSearch.DELETE()}</button
+      >
+      <button
+        {@attach actionTooltip($LL.modal.CLOSE(), "esc")}
+        class="icon"
+        onclick={onclose}>close</button
+      >
+    {/if}
+  </div>
+  {#if currentAction !== undefined}
+    <aside>
+      <h3>{$LL.actionSearch.CURRENT_ACTION()}</h3>
+      <ActionListItem id={currentAction} />
+    </aside>
+    {#if nextAction}
+      <aside>
+        <h3>{$LL.actionSearch.NEXT_ACTION()}</h3>
+        <ActionListItem id={nextAction} />
+      </aside>
+    {/if}
+  {/if}
+  <ul bind:this={resultList}>
+    {#if exact !== undefined}
+      <li class="exact">
+        <i>Exact match</i>
+        <ActionListItem id={exact} onclick={() => select(exact)} />
+      </li>
+    {/if}
+    {#if !exact && code}
+      {#if code >= 2 ** 5 && code < 2 ** 13}
+        <li><button onclick={() => select(code)}>USE CODE</button></li>
+      {:else}
+        <li>Action code is out of range</li>
+      {/if}
+    {/if}
+    {#each results as [category, actions] (actions)}
+      {#if actions.length > 0}
+        <div class="category">
+          <h3>{category.name}</h3>
+          <div class="description">{category.description}</div>
+          <ul>
+            {#each actions as action (action.code)}
+              <button
+                class="action-item"
+                draggable={!onclose}
+                onclick={() => select(action.code)}
+                ondragstart={onclose === undefined
+                  ? (event) => {
+                      if (!event.dataTransfer) return;
+                      event.stopPropagation();
+                      event.dataTransfer.dropEffect = "copy";
+                      event.dataTransfer.clearData();
+                      event.dataTransfer.setData(
+                        "text/plain",
+                        actionToValue(action.code),
+                      );
+                    }
+                  : undefined}
+              >
+                <Action {action} display="verbose" {ignoreIcon}></Action>
+              </button>
+            {/each}
+          </ul>
+        </div>
+      {/if}
+    {/each}
+  </ul>
+</div>
+
+<style lang="scss">
+  .action-item {
+    margin: 0;
+    padding: 0;
+    height: auto;
+    font: inherit;
+
+    &[draggable="true"] {
+      cursor: grab;
+    }
+  }
+
+  aside {
+    opacity: 0.4;
+
+    margin: 8px;
+    border: 1px dashed var(--md-sys-color-outline);
+    border-radius: 8px;
+    pointer-events: none;
+
+    > h3 {
+      margin-inline-start: 16px;
+      margin-block-start: -13px;
+      margin-block-end: 0;
+
+      background: var(--md-sys-color-background);
+      padding-inline: 8px;
+      width: fit-content;
+    }
+
+    @media (prefers-contrast: more) {
+      opacity: 0.8;
+    }
+
+    @media (forced-colors: active) {
+      opacity: 1;
+      color: GrayText;
+    }
+  }
+
+  .search-row {
+    display: flex;
+    align-items: center;
+    gap: 4px;
+    margin-inline: 16px;
+  }
+
+  .content {
+    display: flex;
+    position: relative;
+    flex-direction: column;
+    transform-origin: top left;
+    border-radius: 16px;
+
+    background: var(--md-sys-color-background);
+
+    width: calc(min(30cm, 90%));
+    height: calc(min(100% - 128px, 90%));
+
+    overflow: hidden;
+
+    color: var(--md-sys-color-on-background);
+
+    @media (forced-colors: active) {
+      border: 1px solid CanvasText;
+    }
+  }
+
+  input[type="search"] {
+    transition: all 250ms ease;
+    margin-block-end: 8px;
+    border: none;
+    border-bottom: 1px solid var(--md-sys-color-surface-variant);
+
+    background: none;
+    padding-inline: 16px;
+    width: 100%;
+    height: 64px;
+    color: currentcolor;
+    font-size: 16px;
+
+    font-family: inherit;
+
+    &:focus {
+      outline: none;
+      border-bottom: 1px solid var(--md-sys-color-primary);
+    }
+  }
+
+  ul {
+    --scrollbar-color: var(--md-sys-color-surface-variant);
+
+    box-sizing: border-box;
+    margin: 0;
+    padding: 0;
+    padding-inline: 4px;
+    height: 100%;
+
+    overflow-y: auto;
+
+    scrollbar-gutter: both-edges stable;
+  }
+
+  .category {
+    .description {
+      opacity: 0.8;
+      margin-block-start: -16px;
+      font-style: italic;
+      font-size: 14px;
+    }
+    ul {
+      display: flex;
+      flex-wrap: wrap;
+      gap: 10px;
+      margin-block: 24px;
+      overflow: hidden;
+    }
+  }
+
+  li {
+    display: contents;
+  }
+
+  .exact {
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+    margin-block-start: 8px;
+
+    border: 1px solid var(--md-sys-color-primary);
+    border-radius: 8px;
+
+    width: 100%;
+
+    > i {
+      display: flex;
+      justify-content: center;
+      align-items: center;
+      gap: 4px;
+      border-radius: 0 0 8px 8px;
+
+      background: var(--md-sys-color-primary);
+
+      padding-inline: 6px;
+
+      color: var(--md-sys-color-on-primary);
+    }
+
+    @media (forced-colors: active) {
+      background: Mark;
+    }
+  }
+</style>
--- a/src/lib/components/layout/ActionSelector.svelte
+++ b/src/lib/components/layout/ActionSelector.svelte
@@ -1,16 +1,5 @@
 <script lang="ts">
-  import {
-    KEYMAP_CATEGORIES,
-    KEYMAP_CODES,
-    KEYMAP_IDS,
-    type KeyInfo,
-  } from "$lib/serial/keymap-codes";
-  import FlexSearch from "flexsearch";
-  import { onMount } from "svelte";
-  import ActionListItem from "$lib/components/ActionListItem.svelte";
-  import LL from "$i18n/i18n-svelte";
-  import { action } from "$lib/title";
-  import { get } from "svelte/store";
+  import ActionList from "./ActionList.svelte";

  let {
    currentAction = undefined,
@@ -23,330 +12,34 @@
    onselect: (id: number) => void;
    onclose: () => void;
  } = $props();
-
-  onMount(() => {
-    searchBox.focus();
-  });
-
-  const index = new FlexSearch.Index({ tokenize: "full" });
-
-  $effect(() => {
-    createIndex($KEYMAP_CODES);
-  });
-
-  async function createIndex(codes: Map<number, KeyInfo>) {
-    for (const [, action] of codes) {
-      await index?.addAsync(
-        action.code,
-        `${action.title || ""} ${action.variant || ""} ${action.category} ${action.id || ""} ${
-          action.description || ""
-        }`,
-      );
-    }
-  }
-
-  async function search() {
-    results = (await index!.searchAsync(searchBox.value)) as number[];
-    exact = get(KEYMAP_IDS).get(searchBox.value)?.code;
-    code = Number(searchBox.value);
-  }
-
-  function select(id?: number) {
-    if (id !== undefined) {
-      onselect(id);
-    }
-  }
-
-  function keyboardNavigation(event: KeyboardEvent) {
-    if (event.shiftKey && event.key === "Enter" && exact !== undefined) {
-      onselect(exact);
-    } else if (event.key === "ArrowDown") {
-      const element =
-        resultList.querySelector("li:focus-within")?.nextSibling ??
-        resultList.querySelector("li:not(.exact)");
-      if (element instanceof HTMLLIElement) {
-        element.querySelector("button")?.focus();
-      }
-    } else if (event.key === "ArrowUp") {
-      const element =
-        resultList.querySelector("li:focus-within")?.previousSibling ??
-        resultList.querySelector("li:not(.exact)");
-      if (element instanceof HTMLLIElement) {
-        element.querySelector("button")?.focus();
-      }
-    } else {
-      searchBox.focus();
-      return;
-    }
-    event.preventDefault();
-  }
-
-  let results: number[] = $state([]);
-  let exact: number | undefined = $state(undefined);
-  let code: number = $state(Number.NaN);
-
-  let searchBox: HTMLInputElement;
-  let resultList: HTMLUListElement;
-  let filter: Set<number> | undefined = $state(undefined);
 </script>

-<svelte:window on:keydown={keyboardNavigation} />
-
-<!-- svelte-ignore a11y_click_events_have_key_events -->
-<!-- svelte-ignore a11y_no_noninteractive_element_interactions -->
 <dialog
  open
  onclick={(event) => {
    if (event.target === event.currentTarget) onclose();
  }}
 >
-  <div class="content">
-    <div class="search-row">
-      <input
-        type="search"
-        bind:this={searchBox}
-        oninput={search}
-        onkeypress={(event) => {
-          if (event.key === "Enter") {
-            select(exact);
-          }
-        }}
-        placeholder={$LL.actionSearch.PLACEHOLDER()}
-      />
-      <button onclick={() => select(0)} use:action={{ shortcut: "shift+esc" }}
-        >{$LL.actionSearch.DELETE()}</button
-      >
-      <button
-        use:action={{ title: $LL.modal.CLOSE(), shortcut: "esc" }}
-        class="icon"
-        onclick={onclose}>close</button
-      >
-    </div>
-    <fieldset class="filters">
-      <label
-        >{$LL.actionSearch.filter.ALL()}<input
-          checked
-          name="category"
-          type="radio"
-          value={undefined}
-          bind:group={filter}
-        /></label
-      >
-      {#each $KEYMAP_CATEGORIES as category}
-        <label
-          >{category.name}<input
-            name="category"
-            type="radio"
-            value={new Set(Object.keys(category.actions).map(Number))}
-            bind:group={filter}
-          /></label
-        >
-      {/each}
-    </fieldset>
-    {#if currentAction !== undefined}
-      <aside>
-        <h3>{$LL.actionSearch.CURRENT_ACTION()}</h3>
-        <ActionListItem id={currentAction} />
-      </aside>
-      {#if nextAction}
-        <aside>
-          <h3>{$LL.actionSearch.NEXT_ACTION()}</h3>
-          <ActionListItem id={nextAction} />
-        </aside>
-      {/if}
-    {/if}
-    <ul bind:this={resultList}>
-      {#if exact !== undefined}
-        <li class="exact">
-          <i>Exact match</i>
-          <ActionListItem id={exact} onclick={() => select(exact)} />
-        </li>
-      {/if}
-      {#if !exact && code}
-        {#if code >= 2 ** 5 && code < 2 ** 13}
-          <li><button onclick={() => select(code)}>USE CODE</button></li>
-        {:else}
-          <li>Action code is out of range</li>
-        {/if}
-      {/if}
-      {#if filter !== undefined || results.length > 0}
-        {@const resultValue =
-          results.length === 0
-            ? Array.from($KEYMAP_CODES, ([it]) => it)
-            : results}
-        {#each filter ? resultValue.filter( (it) => filter.has(it), ) : resultValue as id (id)}
-          <li><ActionListItem {id} onclick={() => select(id)} /></li>
-        {/each}
-      {/if}
-    </ul>
-  </div>
+  <ActionList
+    autofocus={true}
+    {currentAction}
+    {nextAction}
+    {onselect}
+    {onclose}
+  />
 </dialog>

 <style lang="scss">
-  .filters {
-    display: flex;
-    gap: 4px;
-    border: none;
-
-    label {
-      height: unset;
-      padding-block: 2px;
-      padding-inline: 4px;
-
-      font-size: 14px;
-
-      border: 1px solid currentcolor;
-      border-radius: 6px;
-
-      &:has(:checked) {
-        color: var(--md-sys-color-on-secondary);
-        background: var(--md-sys-color-secondary);
-      }
-
-      input {
-        display: none;
-      }
-    }
-  }
-
  dialog {
    display: flex;
-    align-items: center;
    justify-content: center;
+    align-items: center;

-    width: 100%;
-    height: 100%;
+    border: none;

    background: rgba(0 0 0 / 60%);

-    border: none;
-  }
-
-  aside {
-    pointer-events: none;
-
-    margin: 8px;
-
-    opacity: 0.4;
-    border: 1px dashed var(--md-sys-color-outline);
-    border-radius: 8px;
-
-    > h3 {
-      width: fit-content;
-      margin-block-start: -13px;
-      margin-block-end: 0;
-      margin-inline-start: 16px;
-      padding-inline: 8px;
-
-      background: var(--md-sys-color-background);
-    }
-
-    @media (prefers-contrast: more) {
-      opacity: 0.8;
-    }
-
-    @media (forced-colors: active) {
-      opacity: 1;
-      color: GrayText;
-    }
-  }
-
-  .search-row {
-    display: flex;
-    gap: 4px;
-    align-items: center;
-    margin-inline: 16px;
-  }
-
-  .content {
-    position: relative;
-    transform-origin: top left;
-
-    overflow: hidden;
-    display: flex;
-    flex-direction: column;
-
-    width: calc(min(30cm, 90%));
-    height: calc(min(100% - 128px, 90%));
-
-    color: var(--md-sys-color-on-background);
-
-    background: var(--md-sys-color-background);
-    border-radius: 16px;
-
-    @media (forced-colors: active) {
-      border: 1px solid CanvasText;
-    }
-  }
-
-  input[type="search"] {
    width: 100%;
-    height: 64px;
-    margin-block-end: 8px;
-    padding-inline: 16px;
-
-    font-family: inherit;
-    font-size: 16px;
-    color: currentcolor;
-
-    background: none;
-    border: none;
-    border-bottom: 1px solid var(--md-sys-color-surface-variant);
-
-    transition: all 250ms ease;
-
-    &:focus {
-      border-bottom: 1px solid var(--md-sys-color-primary);
-      outline: none;
-    }
-  }
-
-  ul {
-    --scrollbar-color: var(--md-sys-color-surface-variant);
-
-    scrollbar-gutter: both-edges stable;
-
-    overflow-y: auto;
-
-    box-sizing: border-box;
    height: 100%;
-    margin: 0;
-    padding: 0;
-    padding-inline: 4px;
-  }
-
-  li {
-    display: contents;
-  }
-
-  .exact {
-    display: flex;
-    flex-direction: column;
-    align-items: center;
-    justify-content: center;
-
-    width: 100%;
-    margin-block-start: 8px;
-
-    border: 1px solid var(--md-sys-color-primary);
-    border-radius: 8px;
-
-    > i {
-      display: flex;
-      gap: 4px;
-      align-items: center;
-      justify-content: center;
-
-      padding-inline: 6px;
-
-      color: var(--md-sys-color-on-primary);
-
-      background: var(--md-sys-color-primary);
-      border-radius: 0 0 8px 8px;
-    }
-
-    @media (forced-colors: active) {
-      background: Mark;
-    }
  }
 </style>
--- a/src/lib/components/layout/GenericLayout.svelte
+++ b/src/lib/components/layout/GenericLayout.svelte
@@ -1,24 +1,22 @@
 <script lang="ts">
-  import { compileLayout } from "$lib/serialization/visual-layout";
-  import type {
-    VisualLayout,
-    CompiledLayoutKey,
-  } from "$lib/serialization/visual-layout";
  import { deviceLayout } from "$lib/serial/connection";
  import { dev } from "$app/environment";
  import ActionSelector from "$lib/components/layout/ActionSelector.svelte";
  import { get } from "svelte/store";
-  import type { Writable } from "svelte/store";
  import KeyboardKey from "$lib/components/layout/KeyboardKey.svelte";
  import { getContext, mount, unmount } from "svelte";
  import type { VisualLayoutConfig } from "./visual-layout.js";
  import { changes, ChangeType, layout } from "$lib/undo-redo";
  import { fly } from "svelte/transition";
  import { expoOut } from "svelte/easing";
+  import { activeLayer, activeProfile } from "$lib/serial/connection";
+  import type {
+    CompiledLayout,
+    CompiledLayoutKey,
+  } from "$lib/assets/layouts/layout.d.ts";

  const { scale, margin, strokeWidth, fontSize, iconFontSize } =
    getContext<VisualLayoutConfig>("visual-layout-config");
-  const activeLayer = getContext<Writable<number>>("active-layer");

  if (dev) {
    // you have absolutely no idea what a difference this makes for performance
@@ -30,8 +28,7 @@
    console.assert(iconFontSize % 1 === 0, "Icon font size must be an integer");
  }

-  let { visualLayout }: { visualLayout: VisualLayout } = $props();
-  let layoutInfo = $state(compileLayout(visualLayout));
+  let { layoutInfo }: { layoutInfo: CompiledLayout } = $props();

  function getCenter(key: CompiledLayoutKey): [x: number, y: number] {
    return [key.pos[0] + key.size[0] / 2, key.pos[1] + key.size[1] / 2];
@@ -125,8 +122,10 @@
    const keyInfo = layoutInfo.keys[index];
    if (!keyInfo) return;
    const clickedGroup = groupParent.children.item(index) as SVGGElement;
-    const nextAction = get(layout)[get(activeLayer)]?.[keyInfo.id];
-    const currentAction = get(deviceLayout)[get(activeLayer)]?.[keyInfo.id];
+    const nextAction =
+      get(layout)[get(activeProfile)]![get(activeLayer)]?.[keyInfo.id];
+    const currentAction =
+      get(deviceLayout)[get(activeProfile)]![get(activeLayer)]?.[keyInfo.id];
    const component = mount(ActionSelector, {
      target: document.body,
      props: {
@@ -142,6 +141,7 @@
                type: ChangeType.Layout,
                id: keyInfo.id,
                layer: get(activeLayer),
+                profile: get(activeProfile),
                action,
              },
            ]);
@@ -217,9 +217,9 @@

 <style lang="scss">
  svg {
-    overflow: visible;
    grid-area: "d";
    width: calc(min(100%, 35cm));
    max-height: calc(100% - 170px);
+    overflow: visible;
  }
 </style>
--- a/src/lib/components/layout/KeyText.svelte
+++ b/src/lib/components/layout/KeyText.svelte
@@ -1,16 +1,16 @@
 <script lang="ts">
-  import { getContext } from "svelte";
  import type { Writable } from "svelte/store";
  import type { VisualLayoutConfig } from "$lib/components/layout/visual-layout";
-  import type { CompiledLayoutKey } from "$lib/serialization/visual-layout";
+  import type { CompiledLayoutKey } from "$lib/assets/layouts/layout.d.ts";
  import { layout } from "$lib/undo-redo.js";
  import { osLayout } from "$lib/os-layout.js";
  import { KEYMAP_CODES } from "$lib/serial/keymap-codes";
-  import { action } from "$lib/title";
+  import { actionTooltip } from "$lib/title";
+  import { activeProfile, activeLayer } from "$lib/serial/connection";
+  import { getContext } from "svelte";

  const { fontSize, margin, inactiveOpacity, inactiveScale, iconFontSize } =
    getContext<VisualLayoutConfig>("visual-layout-config");
-  const activeLayer = getContext<Writable<number>>("active-layer");
  const currentAction = getContext<Writable<Set<number>> | undefined>(
    "highlight-action",
  );
@@ -28,12 +28,19 @@
    middle: [number, number];
    pos: [number, number];
    rotate: number;
-    positions: [[number, number], [number, number], [number, number]];
+    positions: [
+      [number, number],
+      [number, number],
+      [number, number],
+      [number, number],
+    ];
  } = $props();
 </script>

 {#each positions as position, layer}
-  {@const { action: actionId, isApplied } = $layout[layer]?.[key.id] ?? {
+  {@const { action: actionId, isApplied } = $layout[$activeProfile]?.[layer]?.[
+    key.id
+  ] ?? {
    action: 0,
    isApplied: true,
  }}
@@ -65,9 +72,9 @@
      ? "0 0 0"
      : `${direction[0]?.toPrecision(2)}px ${direction[1]?.toPrecision(2)}px 0`}
    style:rotate="{rotate}deg"
-    use:action={{ title: tooltip }}
+    {@attach actionTooltip(tooltip)}
  >
-    {#if code !== 0}
+    {#if code !== 0 && code != 1023}
      {dynamicMapping || icon || display || id || `0x${code.toString(16)}`}
    {/if}
    {#if !isApplied}
@@ -81,15 +88,15 @@
  $transition: 200ms;

  text {
-    will-change: translate, scale;
-    user-select: none;
-    transform-origin: center;
    transform-box: fill-box;
+    transform-origin: center;
    transition:
      fill #{$focus-transition} ease,
      opacity #{$transition} ease,
      translate #{$transition} ease,
      scale #{$transition} ease;
+    will-change: translate, scale;
+    user-select: none;

    @media (prefers-contrast: more) {
      --inactive-opacity: 0.8;
--- a/src/lib/components/layout/KeyboardKey.svelte
+++ b/src/lib/components/layout/KeyboardKey.svelte
@@ -1,5 +1,5 @@
 <script lang="ts">
-  import type { CompiledLayoutKey } from "$lib/serialization/visual-layout";
+  import type { CompiledLayoutKey } from "$lib/assets/layouts/layout.d.ts";
  import { getContext } from "svelte";
  import type { VisualLayoutConfig } from "./visual-layout.js";
  import KeyText from "$lib/components/layout/KeyText.svelte";
@@ -64,6 +64,7 @@
        [-1, 1],
        [-1, -1],
        [1, -1],
+        [1, 1],
      ]}
    />
  {:else if key.shape === "quarter-circle"}
@@ -103,6 +104,7 @@
        [-rotY, -rotX],
        [-rotX, -rotY],
        [rotX, rotY],
+        [rotY, rotX],
      ]}
    />
  {/if}
@@ -113,14 +115,14 @@
  $transition: 200ms;

  rect {
-    transform-origin: center;
    transform-box: fill-box;
+    transform-origin: center;
  }

  path,
  g {
-    transform-origin: top left;
    transform-box: fill-box;
+    transform-origin: top left;
  }

  path,
@@ -138,15 +140,15 @@

  g.faded,
  g:hover {
-    cursor: default;
    opacity: 0.6;
    transition: opacity #{$transition} ease;
+    cursor: default;
  }

  g.highlight,
  g:focus-within {
-    color: var(--md-sys-color-primary);
    outline: none;
+    color: var(--md-sys-color-primary);

    > path,
    > rect {
--- a/src/lib/components/layout/Layout.svelte
+++ b/src/lib/components/layout/Layout.svelte
@@ -1,67 +1,71 @@
 <script lang="ts">
  import { deviceMeta, serialPort } from "$lib/serial/connection";
-  import { action } from "$lib/title";
+  import { actionTooltip } from "$lib/title";
  import GenericLayout from "$lib/components/layout/GenericLayout.svelte";
-  import { getContext } from "svelte";
-  import type { Writable } from "svelte/store";
-  import type { VisualLayout } from "$lib/serialization/visual-layout";
+  import { activeProfile, activeLayer } from "$lib/serial/connection";
  import { fade, fly } from "svelte/transition";
  import { restoreFromFile } from "$lib/backup/backup";
+  import type { CompiledLayout } from "$lib/assets/layouts/layout.d.ts";

-  let device = $derived($serialPort?.device);
-  const activeLayer = getContext<Writable<number>>("active-layer");
-
-  const layers = [
-    ["Numeric Layer", "123", 1],
-    ["Primary Layer", "abc", 0],
-    ["Function Layer", "function", 2],
-  ] as const;
-
-  const layouts = {
+  const layouts: Record<string, (() => Promise<CompiledLayout>) | undefined> = {
    ONE: () =>
-      import("$lib/assets/layouts/one.yml").then(
-        (it) => it.default as VisualLayout,
+      import("$lib/assets/layouts/one.layout.yml").then(
+        (it) => it.default as CompiledLayout,
      ),
    TWO: () =>
-      import("$lib/assets/layouts/one.yml").then(
-        (it) => it.default as VisualLayout,
+      import("$lib/assets/layouts/one.layout.yml").then(
+        (it) => it.default as CompiledLayout,
      ),
    LITE: () =>
-      import("$lib/assets/layouts/lite.yml").then(
-        (it) => it.default as VisualLayout,
+      import("$lib/assets/layouts/lite.layout.yml").then(
+        (it) => it.default as CompiledLayout,
      ),
    X: () =>
-      import("$lib/assets/layouts/generic/103-key.yml").then(
-        (it) => it.default as VisualLayout,
+      import("$lib/assets/layouts/103-key.layout.yml").then(
+        (it) => it.default as CompiledLayout,
+      ),
+    ZERO: () =>
+      import("$lib/assets/layouts/103-key.layout.yml").then(
+        (it) => it.default as CompiledLayout,
      ),
    M4G: () =>
-      import("$lib/assets/layouts/m4g.yml").then(
-        (it) => it.default as VisualLayout,
+      import("$lib/assets/layouts/m4g.layout.yml").then(
+        (it) => it.default as CompiledLayout,
      ),
    M4GR: () =>
-      import("$lib/assets/layouts/m4gr.yml").then(
-        (it) => it.default as VisualLayout,
+      import("$lib/assets/layouts/m4gr.layout.yml").then(
+        (it) => it.default as CompiledLayout,
+      ),
+    T4G: () =>
+      import("$lib/assets/layouts/t4g.layout.yml").then(
+        (it) => it.default as CompiledLayout,
      ),
  };
 </script>

 <div class="container">
-  {#if device}
-    {#await layouts[device]() then visualLayout}
+  {#if $serialPort}
+    {#await layouts[$serialPort.device]?.() then layoutInfo}
      <fieldset transition:fade>
-        {#each layers as [title, icon, value]}
-          <button
-            class="icon"
-            use:action={{ title, shortcut: `alt+${value + 1}` }}
-            onclick={() => ($activeLayer = value)}
-            class:active={$activeLayer === value}
-          >
-            {icon}
-          </button>
-        {/each}
+        <div class="layers">
+          {#each Array.from({ length: $serialPort.layerCount }, (_, i) => i) as layer}
+            <label>
+              <input
+                type="radio"
+                onclick={() => ($activeLayer = layer)}
+                name="layer"
+                value={layer}
+                checked={$activeLayer === layer}
+              />
+              {String.fromCodePoint(
+                "A".codePointAt(0)! + $activeProfile,
+              )}{layer + 1}
+            </label>
+          {/each}
+        </div>
        {#if $deviceMeta?.factoryDefaults?.layout}
          <button
-            use:action={{ title: "Reset Layout" }}
+            {@attach actionTooltip("Reset Layout")}
            transition:fly={{ x: -8 }}
            class="icon reset-layout"
            onclick={() =>
@@ -71,7 +75,9 @@
        {/if}
      </fieldset>

-      <GenericLayout {visualLayout} />
+      {#if layoutInfo}
+        <GenericLayout {layoutInfo} />
+      {/if}
    {/await}
  {/if}
 </div>
@@ -80,8 +86,8 @@
  .container {
    display: flex;
    flex-direction: column;
-    align-items: center;
    justify-content: center;
+    align-items: center;

    width: 100%;
    height: 100%;
@@ -89,71 +95,23 @@
  }

  fieldset {
-    position: relative;
-
    display: flex;
-    align-items: center;
+    position: relative;
    justify-content: center;
+    align-items: center;
+
+    border: none;

    padding: 8px;
-
-    border: none;
  }

-  button.icon {
-    cursor: pointer;
+  .layers {
+    display: flex;
+    justify-content: center;
+    align-items: center;

-    z-index: 1;
+    gap: 2px;

-    font-size: 24px;
-    color: var(--md-sys-color-on-surface-variant);
-
-    background: var(--md-sys-color-surface-variant);
-    border: none;
-
-    transition: all 250ms ease;
-
-    &:nth-child(2) {
-      z-index: 2;
-
-      aspect-ratio: 1;
-
-      font-size: 32px;
-
-      border-radius: 50%;
-    }
-
-    &:first-child,
-    &:nth-child(3) {
-      aspect-ratio: unset;
-      height: unset;
-    }
-
-    &:first-child {
-      margin-inline-end: -8px;
-      padding-inline: 4px 24px;
-      border-radius: 16px 0 0 16px;
-    }
-
-    &:nth-child(3) {
-      margin-inline-start: -8px;
-      padding-inline: 24px 4px;
-      border-radius: 0 16px 16px 0;
-    }
-
-    &.reset-layout {
-      position: absolute;
-      top: 50%;
-      right: 0;
-      transform: translate(100%, -50%);
-      background: none;
-      font-size: 24px;
-    }
-
-    &.active {
-      font-weight: 900;
-      color: var(--md-sys-color-on-tertiary);
-      background: var(--md-sys-color-tertiary);
-    }
+    margin-inline: auto;
  }
 </style>
--- a/src/lib/components/verbose-action.ts
+++ b/src/lib/components/verbose-action.ts
@@ -0,0 +1,9 @@
+import type { KeyInfo } from "$lib/serial/keymap-codes";
+
+export function isVerbose(info: KeyInfo) {
+  return (
+    info.id?.length !== 1 &&
+    info.title &&
+    (!info.id || /F\d{1,2}/.test(info.id) === false)
+  );
+}
--- a/src/lib/dialogs/ConnectionFailed.svelte
+++ b/src/lib/dialogs/ConnectionFailed.svelte
@@ -83,9 +83,9 @@

 <style lang="scss">
  h1 {
+    color: var(--md-sys-color-error);
    font-size: 2em;
    text-align: center;
-    color: var(--md-sys-color-error);
  }

  .buttons {
@@ -100,7 +100,7 @@

  a {
    display: inline;
-    color: var(--md-sys-color-primary);
    padding: 0;
+    color: var(--md-sys-color-primary);
  }
 </style>
--- a/src/lib/dialogs/Dialog.svelte
+++ b/src/lib/dialogs/Dialog.svelte
@@ -16,15 +16,15 @@

 <style lang="scss">
  dialog {
+    box-shadow: 0 0 48px rgba(0 0 0 / 60%);
+    border: none;
+    border-radius: 38px;
+
+    background: var(--md-sys-color-background);
    min-width: 300px;
    max-width: 512px;

    color: var(--md-sys-color-on-background);
-
-    background: var(--md-sys-color-background);
-    border: none;
-    border-radius: 38px;
-    box-shadow: 0 0 48px rgba(0 0 0 / 60%);
  }

  dialog::backdrop {
--- a/src/lib/dialogs/PickChangesDialog.svelte
+++ b/src/lib/dialogs/PickChangesDialog.svelte
@@ -1,217 +0,0 @@
-<script lang="ts">
-  import Dialog from "$lib/dialogs/Dialog.svelte";
-  import type {
-    Change,
-    ChordChange,
-    LayoutChange,
-    SettingChange,
-  } from "$lib/undo-redo";
-  import { ChangeType, chords } from "$lib/undo-redo";
-  import ActionString from "$lib/components/ActionString.svelte";
-  import LL from "$i18n/i18n-svelte";
-  import { KEYMAP_IDS } from "$lib/serial/keymap-codes";
-
-  export let changes: Change[] = [
-    { type: ChangeType.Layout, layer: 0, id: 1, action: 1 },
-    { type: ChangeType.Layout, layer: 1, id: 1, action: 1 },
-    { type: ChangeType.Layout, layer: 1, id: 1, action: 1 },
-    { type: ChangeType.Layout, layer: 1, id: 1, action: 1 },
-    { type: ChangeType.Layout, layer: 1, id: 1, action: 1 },
-    { type: ChangeType.Layout, layer: 1, id: 1, action: 1 },
-    { type: ChangeType.Layout, layer: 1, id: 1, action: 1 },
-    { type: ChangeType.Layout, layer: 1, id: 1, action: 1 },
-    { type: ChangeType.Layout, layer: 1, id: 1, action: 1 },
-    { type: ChangeType.Layout, layer: 1, id: 1, action: 1 },
-    { type: ChangeType.Setting, id: 0, setting: 2 },
-    { type: ChangeType.Setting, id: 0, setting: 2 },
-    { type: ChangeType.Setting, id: 0, setting: 2 },
-    { type: ChangeType.Setting, id: 0, setting: 2 },
-    {
-      type: ChangeType.Chord,
-      id: [1],
-      actions: [55],
-      phrase: [55, 63, 37, 36],
-    },
-    {
-      type: ChangeType.Chord,
-      id: [
-        KEYMAP_IDS.get("y")!.code,
-        KEYMAP_IDS.get("r")!.code,
-        KEYMAP_IDS.get("t")!.code,
-      ],
-      actions: [
-        KEYMAP_IDS.get("y")!.code,
-        KEYMAP_IDS.get("r")!.code,
-        KEYMAP_IDS.get("t")!.code,
-      ],
-      phrase: [55, 63, 37, 36],
-    },
-    {
-      type: ChangeType.Chord,
-      id: [
-        KEYMAP_IDS.get("y")!.code,
-        KEYMAP_IDS.get("r")!.code,
-        KEYMAP_IDS.get("t")!.code,
-      ],
-      actions: [
-        KEYMAP_IDS.get("y")!.code,
-        KEYMAP_IDS.get("r")!.code,
-        KEYMAP_IDS.get("t")!.code,
-      ],
-      phrase: [],
-    },
-  ];
-
-  $: existingChords = new Set($chords.map((it) => JSON.stringify(it.id)));
-
-  $: layoutChanges = Array.from(
-    { length: 3 },
-    (_, i) =>
-      changes.filter(
-        (it) => it.type === ChangeType.Layout && it.layer === i,
-      ) as LayoutChange[],
-  );
-  $: settingChanges = changes.filter(
-    (it) => it.type === ChangeType.Setting,
-  ) as SettingChange[];
-  $: chordChanges = {
-    added: changes.filter(
-      (it) =>
-        it.type === ChangeType.Chord &&
-        it.phrase.length > 0 &&
-        !existingChords.has(JSON.stringify(it.id)),
-    ) as ChordChange[],
-    changed: changes.filter(
-      (it) =>
-        it.type === ChangeType.Chord &&
-        it.phrase.length > 0 &&
-        existingChords.has(JSON.stringify(it.id)),
-    ) as ChordChange[],
-    deleted: changes.filter(
-      (it) => it.type === ChangeType.Chord && it.phrase.length === 0,
-    ) as ChordChange[],
-  };
-  $: totalChordChanges = Object.values(chordChanges).reduce(
-    (acc, curr) => acc + curr.length,
-    0,
-  );
-</script>
-
-<Dialog>
-  <h1>{$LL.changes.TITLE()}</h1>
-  <h2>
-    <label
-      ><input
-        type="checkbox"
-        class="checkbox"
-      />{$LL.changes.ALL_CHANGES()}</label
-    >
-  </h2>
-  <ul>
-    {#if layoutChanges.some((it) => it.length > 0)}
-      <li>
-        <h3>
-          <label>
-            <input type="checkbox" class="checkbox" />
-            {$LL.changes.layout.TITLE(
-              layoutChanges.reduce((acc, curr) => acc + curr.length, 0),
-            )}
-          </label>
-        </h3>
-        <ul>
-          {#each layoutChanges as changes, i}
-            {@const layer = i + 1}
-            {#if changes.length > 0}
-              <li>
-                <h4>
-                  <label>
-                    <input type="checkbox" class="checkbox" />
-                    {$LL.changes.layout.LAYER({
-                      changes: changes.length,
-                      layer,
-                    })}
-                  </label>
-                </h4>
-              </li>
-            {/if}
-          {/each}
-        </ul>
-      </li>
-    {/if}
-    {#if settingChanges.length > 0}
-      <li>
-        <h3>
-          <label
-            ><input
-              type="checkbox"
-              class="checkbox"
-            />{$LL.changes.settings.TITLE(settingChanges.length)}</label
-          >
-        </h3>
-      </li>
-    {/if}
-    {#if totalChordChanges > 0}
-      <li>
-        <h3>
-          <label
-            ><input
-              type="checkbox"
-              class="checkbox"
-            />{$LL.changes.chords.TITLE(totalChordChanges)}</label
-          >
-        </h3>
-        <ul>
-          {#each Object.entries(chordChanges) as [category, changes]}
-            {#if changes.length > 0}
-              <li>
-                <h4>
-                  <label
-                    ><input type="checkbox" class="checkbox" />
-                    {#if category === "added"}
-                      {$LL.changes.chords.NEW_CHORDS(changes.length)}
-                    {:else if category === "changed"}
-                      {$LL.changes.chords.CHANGED_CHORDS(changes.length)}
-                    {:else if category === "deleted"}
-                      {$LL.changes.chords.DELETED_CHORDS(changes.length)}
-                    {/if}
-                  </label>
-                </h4>
-                <ul>
-                  {#each changes as change}
-                    <li>
-                      <label>
-                        <input type="checkbox" class="checkbox" />
-                        <ActionString display="keys" actions={change.actions} />
-                        <ActionString actions={change.phrase} />
-                      </label>
-                    </li>
-                  {/each}
-                </ul>
-              </li>
-            {/if}
-          {/each}
-        </ul>
-      </li>
-    {/if}
-  </ul>
-</Dialog>
-
-<style lang="scss">
-  h1 {
-    font-size: 2em;
-    text-align: center;
-  }
-
-  h2 {
-    font-size: 1.5em;
-  }
-
-  ul {
-    padding-inline-start: 0;
-    list-style: none;
-  }
-
-  li {
-    margin-inline-start: 24px;
-  }
-</style>
--- a/src/lib/fonts/material-symbols-rounded.scss
+++ b/src/lib/fonts/material-symbols-rounded.scss
@@ -1,33 +1,33 @@
@font-face {
-  font-family: "Material Symbols Rounded";
-  font-weight: 100 700;
  font-style: normal;
+  font-weight: 100 700;
  src: url("$lib/assets/icons.min.woff2") format("woff2");
+  font-family: "Material Symbols Rounded";
 }

 .icon {
-  user-select: none;
-
-  direction: ltr;
  display: inline-block;
+  font-style: normal;
+  font-weight: normal;
+  font-size: 24px;
+  line-height: 1;

  /* stylelint-disable-next-line */
  font-family: "Material Symbols Rounded";
-  font-size: 24px;
-  font-feature-settings: "liga";
  font-variation-settings:
    "FILL" var(--icon-fill, 0),
    "wght" var(--icon-weigth, 400),
    "GRAD" var(--icon-grade, 0);
-  font-weight: normal;
-  font-style: normal;
-  line-height: 1;
-  text-transform: none;
+  font-feature-settings: "liga";
  letter-spacing: normal;
+
+  direction: ltr;
+  user-select: none;
+  text-transform: none;
  word-wrap: normal;
-  white-space: nowrap;

  transition: font-variation-settings 250ms ease;
+  white-space: nowrap;

  -moz-osx-font-smoothing: grayscale;
 }
--- a/src/lib/fonts/noto-sans-mono.scss
+++ b/src/lib/fonts/noto-sans-mono.scss
@@ -66,13 +66,13 @@

 /* noto-sans-mono-latin-ext-wght-normal */
@font-face {
-  font-family: "Noto Sans Mono Variable";
-  font-weight: 100 900;
  font-style: normal;
-  font-display: swap;
+  font-weight: 100 900;
  font-stretch: 62.5% 100%;
  src: url("@fontsource-variable/noto-sans-mono/files/noto-sans-mono-latin-ext-wght-normal.woff2")
    format("woff2-variations");
+  font-family: "Noto Sans Mono Variable";
+  font-display: swap;
  unicode-range:
    U+0100-02AF, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329,
    U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F,
@@ -81,13 +81,13 @@

 /* noto-sans-mono-latin-wght-normal */
@font-face {
-  font-family: "Noto Sans Mono";
-  font-weight: 100 900;
  font-style: normal;
-  font-display: swap;
+  font-weight: 100 900;
  font-stretch: 62.5% 100%;
  src: url("@fontsource-variable/noto-sans-mono/files/noto-sans-mono-latin-wght-normal.woff2")
    format("woff2-variations");
+  font-family: "Noto Sans Mono";
+  font-display: swap;
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+2000-206F, U+2074,
--- a/src/lib/hover-popover.ts
+++ b/src/lib/hover-popover.ts
@@ -0,0 +1,39 @@
+import type { Attachment } from "svelte/attachments";
+
+export const hotkeys = new Map<string, HTMLElement>();
+
+export function tooltip(
+  target: HTMLElement | undefined,
+  shortcut?: string,
+): Attachment<HTMLElement> {
+  return (node: HTMLElement) => {
+    function show() {
+      if (!target) return;
+      target.showPopover({ source: node });
+    }
+    function hide() {
+      if (!target) return;
+      target.hidePopover();
+    }
+
+    node.addEventListener("mouseenter", show);
+    node.addEventListener("focus", show);
+    node.addEventListener("mouseleave", hide);
+    node.addEventListener("blur", hide);
+
+    if (shortcut && node instanceof HTMLElement) {
+      hotkeys.set(shortcut, node);
+    }
+
+    return () => {
+      node.removeEventListener("mouseenter", show);
+      node.removeEventListener("focus", show);
+      node.removeEventListener("mouseleave", hide);
+      node.removeEventListener("blur", hide);
+
+      if (shortcut && node instanceof HTMLElement) {
+        hotkeys.delete(shortcut);
+      }
+    };
+  };
+}
--- a/src/lib/learn/chords.ts
+++ b/src/lib/learn/chords.ts
@@ -5,8 +5,8 @@ import { type ChordInfo, chords } from "$lib/undo-redo";
 import { derived } from "svelte/store";

 export const words = derived(
-  [chords, osLayout],
-  ([chords, layout]) =>
+  [chords, osLayout, KEYMAP_CODES],
+  ([chords, layout, KEYMAP_CODES]) =>
    new Map<string, ChordInfo>(
      chords
        .map((chord) => ({
--- a/src/lib/meta/meta-storage.ts
+++ b/src/lib/meta/meta-storage.ts
@@ -17,7 +17,7 @@ export async function getMeta(
  try {
    if (!browser) return fetchMeta(device, version, fetch);

-    const dbRequest = indexedDB.open("version-meta", 4);
+    const dbRequest = indexedDB.open("version-meta", 6);
    const db = await new Promise<IDBDatabase>((resolve, reject) => {
      dbRequest.onsuccess = () => resolve(dbRequest.result);
      dbRequest.onerror = () => reject(dbRequest.error);
@@ -130,6 +130,9 @@ async function fetchMeta(
            async (load) => load().then((it) => (it as any).default),
          ),
        )),
+    recipes: await (meta?.recipes
+      ? fetch(`${path}/${meta.recipes}`).then((it) => it.json())
+      : undefined),
    update: {
      uf2:
        meta?.update?.uf2 ??
@@ -144,6 +147,10 @@ async function fetchMeta(
        )?.name ??
        undefined,
      esptool: meta?.update?.esptool ?? undefined,
+      js: meta?.update?.js ?? undefined,
+      wasm: meta?.update?.wasm ?? undefined,
+      dll: meta?.update?.dll ?? undefined,
+      so: meta?.update?.so ?? undefined,
    },
    spiFlash: meta?.spi_flash ?? undefined,
  };
--- a/src/lib/meta/types/meta.ts
+++ b/src/lib/meta/types/meta.ts
@@ -13,6 +13,7 @@ export interface SettingsMeta {

 export interface SettingsItemMeta {
  id: number;
+  name?: string;
  description?: string;
  enum?: string[];
  range: [number, number];
@@ -43,6 +44,7 @@ export interface RawVersionMeta {
  actions: string;
  settings: string;
  changelog: string;
+  recipes: string;
  factory_defaults: {
    layout: string;
    settings: string;
@@ -52,11 +54,48 @@ export interface RawVersionMeta {
    ota: string | null;
    uf2: string | null;
    esptool: EspToolData | null;
+    js: string | null;
+    wasm: string | null;
+    dll: string | null;
+    so: string | null;
  };
  files: string[];
  spi_flash: SPIFlashInfo | null;
 }

+export interface E2eAddChord {
+  input: string[][];
+  output: string[];
+}
+
+export interface E2eTestItem {
+  keys?: string[];
+  modifiers?: Record<string, boolean>;
+  press?: string[];
+  release?: string[];
+  step?: number;
+  skip?: number;
+  idle?: boolean;
+  clearChords?: boolean;
+  addChords?: E2eAddChord[];
+  settings: Record<string, Record<string, string | number>>;
+}
+
+export interface E2eTest {
+  matrix?: string[];
+  test: E2eTestItem[];
+}
+
+export interface E2eDemo {
+  demo?: {
+    id?: string;
+    title?: string;
+    description?: string;
+  };
+  matrix?: string[];
+  tests: E2eTest[];
+}
+
 export interface VersionMeta {
  version: string;
  device: string;
@@ -69,6 +108,7 @@ export interface VersionMeta {
  actions: KeymapCategory[];
  settings: SettingsMeta[];
  changelog: Changelog;
+  recipes?: E2eDemo[];
  factoryDefaults?: {
    layout: CharaLayoutFile;
    settings: CharaSettingsFile;
@@ -78,6 +118,10 @@ export interface VersionMeta {
    ota?: string;
    uf2?: string;
    esptool?: EspToolData;
+    js?: string;
+    wasm?: string;
+    dll?: string;
+    so?: string;
  };
  spiFlash?: SPIFlashInfo;
 }
--- a/src/lib/os-layout.ts
+++ b/src/lib/os-layout.ts
@@ -11,6 +11,7 @@ async function updateLayout() {
    layout.size !== currentLayout.size ||
    [...layout.keys()].some((key) => layout.get(key) !== currentLayout.get(key))
  ) {
+    console.log(layout);
    osLayout.set(layout);
  }
 }
--- a/src/lib/serial/chord.ts
+++ b/src/lib/serial/chord.ts
@@ -1,4 +1,5 @@
 import { compressActions, decompressActions } from "../serialization/actions";
+import type { KeyInfo } from "./keymap-codes";

 export interface Chord {
  actions: number[];
@@ -56,6 +57,103 @@ export function deserializeActions(native: bigint): number[] {
  return actions;
 }

+const compoundHashItems = 3;
+const maxChordInputItems = 12;
+const actionBits = 10;
+const actionMask = (1 << actionBits) - 1;
+
+/**
+ * Applies the compound value to a **valid** chord input
+ */
+export function applyCompound(actions: number[], compound: number): number[] {
+  const result = [...actions];
+  for (let i = 0; i < compoundHashItems; i++) {
+    result[i] = (compound >>> (i * actionBits)) & actionMask;
+  }
+  result[compoundHashItems] = 0;
+  return result;
+}
+
+/**
+ * Extracts the compound value from a chord input, if present
+ */
+export function splitCompound(
+  actions: number[],
+): [inputs: number[], compound: number | undefined] {
+  if (actions[compoundHashItems] != 0) {
+    return [
+      actions.slice(
+        Math.max(
+          0,
+          actions.findIndex((it) => it !== 0),
+        ),
+      ),
+      undefined,
+    ];
+  }
+
+  let compound = 0;
+  for (let i = 0; i < compoundHashItems; i++) {
+    compound |= (actions[i] ?? 0) << (i * actionBits);
+  }
+
+  return [
+    actions.slice(
+      actions.findIndex((it, i) => i > compoundHashItems && it !== 0),
+    ),
+    compound === 0 ? undefined : compound,
+  ];
+}
+
+export function willBeValidChordInput(
+  inputCount: number,
+  hasCompound: boolean,
+): boolean {
+  return (
+    inputCount > 0 &&
+    inputCount <= maxChordInputItems - (hasCompound ? compoundHashItems + 1 : 0)
+  );
+}
+
+const ACTION_JOIN = 574;
+const ACTION_KSC_00 = 256;
+
+export function hasConcatenator(
+  actions: number[],
+  ids: Map<number, KeyInfo>,
+): boolean {
+  const lastAction = actions.at(-1);
+  for (const action of actions) {
+    if (!ids.get(action)?.printable) {
+      if (actions.length == 0) {
+        return false;
+      }
+      return lastAction == ACTION_JOIN;
+    }
+  }
+  return lastAction != ACTION_KSC_00;
+}
+
+/**
+ * Composes a chord input from a list of actions and an optional compound value
+ * to a valid chord input
+ */
+export function composeChordInput(
+  actions: number[],
+  compound?: number,
+): number[] {
+  const result = [
+    ...Array.from(
+      {
+        length: Math.max(0, maxChordInputItems - actions.length),
+      },
+      () => 0,
+    ),
+    ...actions.slice(0, maxChordInputItems).sort((a, b) => a - b),
+  ];
+  return compound !== undefined ? applyCompound(result, compound) : result;
+}
+
 /**
 * Hashes a chord input the same way as CCOS
 */
@@ -69,5 +167,9 @@ export function hashChord(actions: number[]) {
  for (let i = 0; i < 16; i++) {
    hash = Math.imul(hash ^ view.getUint8(i), 16777619);
  }
-  return hash & 0x3fff_ffff;
+  if ((hash & 0xff) === 0xff) {
+    hash ^= 0xff;
+  }
+  hash &= 0x3fff_ffff;
+  return hash === 0 ? 1 : hash;
 }
--- a/src/lib/serial/connection.ts
+++ b/src/lib/serial/connection.ts
@@ -1,5 +1,5 @@
 import { get, writable } from "svelte/store";
-import { CharaDevice } from "$lib/serial/device";
+import { CharaDevice, type SerialPortLike } from "$lib/serial/device";
 import type { Chord } from "$lib/serial/chord";
 import type { Writable } from "svelte/store";
 import type { CharaLayout } from "$lib/serialization/layout";
@@ -10,6 +10,10 @@ import type { VersionMeta } from "$lib/meta/types/meta";

 export const serialPort = writable<CharaDevice | undefined>();

+navigator.serial?.addEventListener("disconnect", async (event) => {
+  serialPort.set(undefined);
+});
+
 export interface SerialLogEntry {
  type: "input" | "output" | "system";
  value: string;
@@ -29,26 +33,32 @@ export const deviceChords = persistentWritable<Chord[]>(
 /**
 * Layout as read from the device
 */
-export const deviceLayout = persistentWritable<CharaLayout>(
-  "layout",
-  [[], [], []],
+export const deviceLayout = persistentWritable<CharaLayout[]>(
+  "layout-profiles",
+  [],
  () => get(userPreferences).backup,
 );

 /**
 * Settings as read from the device
 */
-export const deviceSettings = persistentWritable<number[]>(
-  "device-settings",
+export const deviceSettings = persistentWritable<number[][]>(
+  "settings-profiles",
  [],
  () => get(userPreferences).backup,
 );

+export const activeProfile = persistentWritable<number>("active-profile", 0);
+export const activeLayer = persistentWritable<number>("active-profile", 0);
+
 export const syncStatus: Writable<
  "done" | "error" | "downloading" | "uploading"
 > = writable("done");

-export const deviceMeta = writable<VersionMeta | undefined>(undefined);
+export const deviceMeta = persistentWritable<VersionMeta | undefined>(
+  "current-meta",
+  undefined,
+);

 export interface ProgressInfo {
  max: number;
@@ -56,9 +66,13 @@ export interface ProgressInfo {
 }
 export const syncProgress = writable<ProgressInfo | undefined>(undefined);

-export async function initSerial(manual = false, withSync = true) {
-  const device = get(serialPort) ?? new CharaDevice();
-  await device.init(manual);
+export async function initSerial(port: SerialPortLike, withSync: boolean) {
+  const prev = get(serialPort);
+  try {
+    prev?.close();
+  } catch {}
+  const device = new CharaDevice(port);
+  await device.init();
  serialPort.set(device);
  if (withSync) {
    await sync();
@@ -80,30 +94,49 @@ export async function sync() {
    .map((it) => it.items.length)
    .reduce((a, b) => a + b, 0);

-  const max = maxSettings + device.keyCount * 3 + chordCount;
+  const max =
+    (maxSettings + device.keyCount * device.layerCount) * device.profileCount +
+    chordCount;
  let current = 0;
+  activeProfile.update((it) => Math.min(it, device.profileCount - 1));
+  activeLayer.update((it) => Math.min(it, device.layerCount - 1));
  syncProgress.set({ max, current });
  function progressTick() {
    current++;
    syncProgress.set({ max, current });
  }

-  const parsedSettings: number[] = [];
-  for (const category of meta.settings) {
-    for (const setting of category.items) {
-      try {
-        parsedSettings[setting.id] = await device.getSetting(setting.id);
-      } catch {}
+  const parsedSettings: number[][] = Array.from(
+    { length: device.profileCount },
+    () => [],
+  );
+  for (const [profile, settings] of parsedSettings.entries()) {
+    for (const category of meta.settings) {
+      for (const setting of category.items) {
+        try {
+          settings[setting.id] = await device.getSetting(profile, setting.id);
+        } catch {}
+      }
+      progressTick();
    }
-    progressTick();
  }
  deviceSettings.set(parsedSettings);

-  const parsedLayout: CharaLayout = [[], [], []];
-  for (let layer = 1; layer <= 3; layer++) {
-    for (let i = 0; i < device.keyCount; i++) {
-      parsedLayout[layer - 1]![i] = await device.getLayoutKey(layer, i);
-      progressTick();
+  const parsedLayout: CharaLayout[] = Array.from(
+    { length: device.profileCount },
+    () =>
+      Array.from({ length: device.layerCount }, () =>
+        Array.from({ length: device.keyCount }, () => 0),
+      ),
+  );
+  for (const [profile, layout] of parsedLayout.entries()) {
+    for (const [layer, keys] of layout.entries()) {
+      for (let i = 0; i < keys.length; i++) {
+        try {
+          keys[i] = await device.getLayoutKey(profile, layer + 1, i);
+        } catch {}
+        progressTick();
+      }
    }
  }
  deviceLayout.set(parsedLayout);
--- a/src/lib/serial/device.ts
+++ b/src/lib/serial/device.ts
@@ -1,7 +1,6 @@
 import { LineBreakTransformer } from "$lib/serial/line-break-transformer";
 import { serialLog } from "$lib/serial/connection";
 import type { Chord } from "$lib/serial/chord";
-import { SemVer } from "$lib/serial/sem-ver";
 import {
  parseChordActions,
  parsePhrase,
@@ -10,8 +9,9 @@ import {
 } from "$lib/serial/chord";
 import { browser } from "$app/environment";
 import { showConnectionFailedDialog } from "$lib/dialogs/connection-failed-dialog";
+import semverGte from "semver/functions/gte";

-const PORT_FILTERS: Map<string, SerialPortFilter> = new Map([
+export const PORT_FILTERS: Map<string, SerialPortFilter> = new Map([
  ["ONE M0", { usbProductId: 32783, usbVendorId: 9114 }],
  ["TWO S3 (pre-production)", { usbProductId: 0x8252, usbVendorId: 0x303a }],
  ["TWO S3", { usbProductId: 0x8253, usbVendorId: 0x303a }],
@@ -20,15 +20,55 @@ const PORT_FILTERS: Map<string, SerialPortFilter> = new Map([
  ["X", { usbProductId: 0x818b, usbVendorId: 0x303a }],
  ["M4G S3 (pre-production)", { usbProductId: 0x1001, usbVendorId: 0x303a }],
  ["M4G S3", { usbProductId: 0x829a, usbVendorId: 0x303a }],
+  ["T4G S2", { usbProductId: 0x82f2, usbVendorId: 0x303a }],
 ]);

+const DEVICE_ALIASES = new Map<string, Set<string>>([
+  ["CC1", new Set(["ONE M0", "one_m0"])],
+  ["CC2", new Set(["TWO S3", "two_s3", "TWO S3 (pre-production)"])],
+  ["Lite (S2)", new Set(["LITE S2", "lite_s2"])],
+  ["Lite (M0)", new Set(["LITE M0", "lite_m0"])],
+  ["CCX", new Set(["X", "ccx"])],
+  ["M4G", new Set(["M4G S3", "m4g_s3", "M4G S3 (pre-production)"])],
+  ["M4G (right)", new Set(["M4GR S3", "m4gr_s3"])],
+  ["T4G", new Set(["T4G S2", "t4g_s2"])],
+]);
+
+export function getName(alias: string): string {
+  for (const [name, aliases] of DEVICE_ALIASES.entries()) {
+    if (aliases.has(alias)) {
+      return name;
+    }
+  }
+  return alias;
+}
+
+export function getPortName(port: SerialPort): string {
+  const { usbProductId, usbVendorId } = port.getInfo();
+  console.log(port.getInfo());
+  for (const [name, filter] of PORT_FILTERS.entries()) {
+    if (
+      filter.usbProductId === usbProductId &&
+      filter.usbVendorId === usbVendorId
+    ) {
+      return getName(name);
+    }
+  }
+  return `Unknown Device (0x${usbVendorId?.toString(
+    16,
+  )}/0x${usbProductId?.toString(16)})`;
+}
+
 const KEY_COUNTS = {
  ONE: 90,
  TWO: 90,
  LITE: 67,
  X: 256,
+  ENGINE: 256,
  M4G: 90,
  M4GR: 90,
+  T4G: 7,
+  ZERO: 256,
 } as const;

 if (
@@ -86,8 +126,12 @@ async function timeout<T>(promise: Promise<T>, ms: number): Promise<T> {
  ]).finally(() => clearTimeout(timer));
 }

+export type SerialPortLike = Pick<
+  SerialPort,
+  "readable" | "writable" | "open" | "close" | "getInfo" | "forget"
+>;
+
 export class CharaDevice {
-  private port!: SerialPort;
  private reader!: ReadableStreamDefaultReader<string>;

  private readonly abortController1 = new AbortController();
@@ -100,28 +144,25 @@ export class CharaDevice {
  private readonly suspendDebounce = 100;
  private suspendDebounceId?: number;

-  version!: SemVer;
+  version!: string;
  company!: "CHARACHORDER" | "FORGE";
-  device!: "ONE" | "TWO" | "LITE" | "X" | "M4G";
+  device!: "ONE" | "TWO" | "LITE" | "X" | "M4G" | "ENGINE" | "ZERO";
  chipset!: "M0" | "S2" | "S3";
  keyCount!: 90 | 67 | 256;
+  layerCount = 3;
+  profileCount = 1;

  get portInfo() {
    return this.port.getInfo();
  }

-  constructor(private readonly baudRate = 115200) {}
+  constructor(
+    private readonly port: SerialPortLike,
+    public baudRate = 115200,
+  ) {}

-  async init(manual = false) {
+  async init() {
    try {
-      const ports = await getViablePorts();
-      this.port =
-        !manual && ports.length === 1
-          ? ports[0]!
-          : await navigator.serial.requestPort({
-              filters: [...PORT_FILTERS.values()],
-            });
-
      await this.port.open({ baudRate: this.baudRate });
      const info = this.port.getInfo();
      serialLog.update((it) => {
@@ -135,13 +176,19 @@ export class CharaDevice {
      });
      await this.port.close();

-      this.version = new SemVer(
-        await this.send(1, ["VERSION"]).then(([version]) => version),
+      this.version = await this.send(1, ["VERSION"]).then(
+        ([version]) => version,
      );
      const [company, device, chipset] = await this.send(3, ["ID"]);
      this.company = company as typeof this.company;
      this.device = device as typeof this.device;
      this.chipset = chipset as typeof this.chipset;
+      if (semverGte(this.version, "2.2.0-beta.4")) {
+        this.profileCount = this.chipset === "M0" ? 2 : 3;
+      }
+      if (semverGte(this.version, "2.2.0-beta.20")) {
+        this.layerCount = this.chipset === "M0" ? 3 : 4;
+      }
      this.keyCount = KEY_COUNTS[this.device];
    } catch (e) {
      console.error(e);
@@ -235,6 +282,10 @@ export class CharaDevice {
    await this.port.forget();
  }

+  async close() {
+    await this.port.close();
+  }
+
  /**
   * Read/write to serial port
   */
@@ -291,23 +342,24 @@ export class CharaDevice {
        .join(" ")
        .replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
      const readResult = await read(timeout);
-      if (readResult === undefined) {
+      return readResult
+        ?.replace(new RegExp(`^${commandString} `), "")
+        .split(" ");
+    }).then((it) => {
+      if (it === undefined) {
        console.error("No response");
        return Array(expectedLength).fill("NO_RESPONSE") as LengthArray<
          string,
          T
        >;
      }
-      const array = readResult
-        .replace(new RegExp(`^${commandString} `), "")
-        .split(" ");
-      if (array.length < expectedLength) {
+      if (it.length < expectedLength) {
        console.error("Response too short");
-        return array.concat(
-          Array(expectedLength - array.length).fill("TOO_SHORT"),
+        return it.concat(
+          Array(expectedLength - it.length).fill("TOO_SHORT"),
        ) as LengthArray<string, T>;
      }
-      return array as LengthArray<string, T>;
+      return it as LengthArray<string, T>;
    });
  }

@@ -350,7 +402,7 @@ export class CharaDevice {
      stringifyChordActions(chord.actions),
      stringifyPhrase(chord.phrase),
    ]);
-    if (status !== "0") console.error(`Failed with status ${status}`);
+    if (status !== "0") throw new Error(`Failed with status ${status}`);
  }

  async deleteChord(chord: Pick<Chord, "actions">) {
@@ -369,11 +421,16 @@ export class CharaDevice {
   * @param id id of the key, refer to the individual device for where each key is
   * @param action the assigned action id
   */
-  async setLayoutKey(layer: number, id: number, action: number) {
+  async setLayoutKey(
+    profile: number,
+    layer: number,
+    id: number,
+    action: number,
+  ) {
    const [status] = await this.send(1, [
      "VAR",
      "B4",
-      `A${layer}`,
+      `${String.fromCodePoint("A".codePointAt(0)! + profile)}${layer}`,
      id.toString(),
      action.toString(),
    ]);
@@ -386,11 +443,11 @@ export class CharaDevice {
   * @param id id of the key, refer to the individual device for where each key is
   * @returns the assigned action id
   */
-  async getLayoutKey(layer: number, id: number) {
+  async getLayoutKey(profile: number, layer: number, id: number) {
    const [position, status] = await this.send(2, [
      "VAR",
      "B3",
-      `A${layer}`,
+      `${String.fromCodePoint("A".codePointAt(0)! + profile)}${layer}`,
      id.toString(),
    ]);
    if (status !== "0") throw new Error(`Failed with status ${status}`);
@@ -415,11 +472,11 @@ export class CharaDevice {
   * Settings are applied until the next reboot or loss of power.
   * To permanently store the settings, you *must* call commit.
   */
-  async setSetting(id: number, value: number) {
+  async setSetting(profile: number, id: number, value: number) {
    const [status] = await this.send(1, [
      "VAR",
      "B2",
-      id.toString(16).toUpperCase(),
+      (id + profile * 0x100).toString(16).toUpperCase(),
      value.toString(),
    ]);
    if (status !== "0") throw new Error(`Failed with status ${status}`);
@@ -428,11 +485,11 @@ export class CharaDevice {
  /**
   * Retrieves a setting from the device
   */
-  async getSetting(id: number): Promise<number> {
+  async getSetting(profile: number, id: number): Promise<number> {
    const [value, status] = await this.send(2, [
      "VAR",
      "B1",
-      id.toString(16).toUpperCase(),
+      (id + profile * 0x100).toString(16).toUpperCase(),
    ]);
    if (status !== "0")
      throw new Error(
--- a/src/lib/serial/sem-ver.ts
+++ b/src/lib/serial/sem-ver.ts
@@ -1,32 +0,0 @@
-export class SemVer {
-  major = 0;
-  minor = 0;
-  patch = 0;
-  preRelease?: string;
-  meta?: string;
-
-  constructor(versionString: string) {
-    const result =
-      /^([0-9]+)\.([0-9]+)\.([0-9]+)(?:-([0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?(?:\+([0-9A-Za-z-]+))?$/.exec(
-        versionString,
-      );
-    if (!result) {
-      console.error("Invalid version string:", versionString);
-    } else {
-      const [, major, minor, patch, preRelease, meta] = result;
-      this.major = Number.parseInt(major ?? "NaN");
-      this.minor = Number.parseInt(minor ?? "NaN");
-      this.patch = Number.parseInt(patch ?? "NaN");
-      if (preRelease) this.preRelease = preRelease;
-      if (meta) this.meta = meta;
-    }
-  }
-
-  toString() {
-    return (
-      `${this.major}.${this.minor}.${this.patch}` +
-      (this.preRelease ? `-${this.preRelease}` : "") +
-      (this.meta ? `+${this.meta}` : "")
-    );
-  }
-}
--- a/src/lib/serialization/base64.ts
+++ b/src/lib/serialization/base64.ts
@@ -29,5 +29,10 @@ export async function fromBase64(
      .replaceAll(".", "+")
      .replaceAll("_", "/")
      .replaceAll("-", "=")}`,
-  ).then((it) => it.blob());
+  )
+    .then((it) => {
+      console.log(it);
+      return it;
+    })
+    .then((it) => it.blob());
 }
--- a/src/lib/serialization/layout.ts
+++ b/src/lib/serialization/layout.ts
@@ -4,13 +4,10 @@ import { fromBase64, toBase64 } from "$lib/serialization/base64";
 export interface NewCharaLayout {
  charaLayoutVersion: 1;
  device: "one" | "lite" | string;
-  /**
-   * Layers A1-A3, with numeric action codes on each
-   */
-  layers: [number[], number[], number[]];
+  layers: number[][];
 }

-export type CharaLayout = [number[], number[], number[]];
+export type CharaLayout = number[][];

 /**
 * Serialize a layout into a micro package
--- a/src/lib/setting.ts
+++ b/src/lib/setting.ts
@@ -1,5 +1,9 @@
 import type { Action } from "svelte/action";
 import { changes, ChangeType, settings } from "$lib/undo-redo";
+import { activeProfile } from "./serial/connection";
+import { combineLatest, map } from "rxjs";
+import { fromReadable } from "./util/from-readable";
+import { get } from "svelte/store";

 /**
 * https://gist.github.com/mjackson/5311256
@@ -58,22 +62,22 @@ function hsvToRgb(h: number, s: number, v: number): [number, number, number] {

  switch (i % 6) {
    case 0:
-      (r = v), (g = t), (b = p);
+      ((r = v), (g = t), (b = p));
      break;
    case 1:
-      (r = q), (g = v), (b = p);
+      ((r = q), (g = v), (b = p));
      break;
    case 2:
-      (r = p), (g = v), (b = t);
+      ((r = p), (g = v), (b = t));
      break;
    case 3:
-      (r = p), (g = q), (b = v);
+      ((r = p), (g = q), (b = v));
      break;
    case 4:
-      (r = t), (g = p), (b = v);
+      ((r = t), (g = p), (b = v));
      break;
    case 5:
-      (r = v), (g = p), (b = q);
+      ((r = v), (g = p), (b = q));
      break;
  }

@@ -103,37 +107,42 @@ export const setting: Action<
    ? Number(node.getAttribute("max"))
    : undefined;

-  const unsubscribe = settings.subscribe(async (settings) => {
-    if (id in settings) {
-      const { value, isApplied } = settings[id]!;
-      if (isNumeric) {
-        node.value = (
-          inverse !== undefined
-            ? inverse / value
-            : scale !== undefined
-              ? scale * value
-              : value
-        ).toString();
-      } else if (isColor) {
-        const rgb = hsvToRgb(
-          settings[id]!.value,
-          settings[id + 1]!.value,
-          settings[id + 2]!.value,
-        );
-        node.value = `#${rgb.map((c) => c.toString(16).padStart(2, "0")).join("")}`;
+  const subscription = combineLatest([
+    fromReadable(settings),
+    fromReadable(activeProfile),
+  ])
+    .pipe(map(([settings, profile]) => settings[profile]!))
+    .subscribe(async (settings) => {
+      if (id in settings) {
+        const { value, isApplied } = settings[id]!;
+        if (isNumeric) {
+          node.value = (
+            inverse !== undefined
+              ? inverse / value
+              : scale !== undefined
+                ? scale * value
+                : value
+          ).toString();
+        } else if (isColor) {
+          const rgb = hsvToRgb(
+            settings[id]!.value,
+            settings[id + 1]!.value,
+            settings[id + 2]!.value,
+          );
+          node.value = `#${rgb.map((c) => c.toString(16).padStart(2, "0")).join("")}`;
+        } else {
+          node.checked = value !== 0;
+        }
+        if (isApplied) {
+          node.classList.remove("pending-changes");
+        } else {
+          node.classList.add("pending-changes");
+        }
+        node.removeAttribute("disabled");
      } else {
-        node.checked = value !== 0;
+        node.setAttribute("disabled", "");
      }
-      if (isApplied) {
-        node.classList.remove("pending-changes");
-      } else {
-        node.classList.add("pending-changes");
-      }
-      node.removeAttribute("disabled");
-    } else {
-      node.setAttribute("disabled", "");
-    }
-  });
+    });

  async function listener() {
    let value: number;
@@ -160,6 +169,7 @@ export const setting: Action<
            type: ChangeType.Setting,
            id: id + i,
            setting: value,
+            profile: get(activeProfile),
          })),
        );
        return changes;
@@ -175,6 +185,7 @@ export const setting: Action<
          type: ChangeType.Setting,
          id: id,
          setting: value,
+          profile: get(activeProfile),
        },
      ]);
      return changes;
@@ -186,7 +197,7 @@ export const setting: Action<
  return {
    destroy() {
      node.removeEventListener("change", listener);
-      unsubscribe();
+      subscription.unsubscribe();
    },
  };
 };
--- a/src/lib/style/_kbd.scss
+++ b/src/lib/style/_kbd.scss
@@ -1,18 +1,23 @@
 kbd {
+  --bg-color: color-mix(
+    in srgb,
+    var(--md-sys-color-surface-variant) 50%,
+    transparent
+  );
+  --border-radius: 4px;
+
  display: inline-flex;
-  align-items: center;
+  position: relative;
  justify-content: center;
-
-  height: 20px;
+  align-items: center;
  margin-block: 6px;
+  border-radius: var(--border-radius);
+  background: var(--bg-color);
  padding: 4px;
-
-  font-size: 14px;
-  font-weight: normal;
+  height: 20px;
  color: currentcolor;
-
-  border: 1px solid currentcolor;
-  border-radius: 4px;
+  font-weight: normal;
+  font-size: 14px;

  &.icon {
    padding: 2px;
@@ -21,8 +26,8 @@ kbd {

  &:has(> kbd) {
    gap: 4px;
-    padding: 0;
    border: none;
+    padding: 0;
  }

  > kbd {
--- a/src/lib/style/_reset.scss
+++ b/src/lib/style/_reset.scss
@@ -1,4 +1,4 @@
 * {
-  box-sizing: border-box;
  appearance: none;
+  box-sizing: border-box;
 }
--- a/src/lib/style/elements/_h1.scss
+++ b/src/lib/style/elements/_h1.scss
@@ -1,6 +1,6 @@
 h1 {
  margin-block-start: 0;
-  font-size: 4rem;
-  font-weight: 700;
  color: var(--md-sys-color-secondary);
+  font-weight: 700;
+  font-size: 4rem;
 }
--- a/src/lib/style/elements/_popover.scss
+++ b/src/lib/style/elements/_popover.scss
@@ -0,0 +1,67 @@
+$animation-duration: 150ms;
+$translate: translateY(8px);
+
+[popover] {
+  position: absolute;
+
+  opacity: 0;
+
+  transition:
+    transform $animation-duration ease,
+    opacity $animation-duration linear,
+    overlay $animation-duration allow-discrete,
+    display $animation-duration allow-discrete;
+
+  margin: 0;
+  inset: unset;
+  border: 1px solid var(--md-sys-color-outline);
+  border-radius: 8px;
+  background: var(--md-sys-color-surface);
+  padding: 8px;
+  color: var(--md-sys-color-on-surface);
+  font-weight: initial;
+  font-size: initial;
+
+  font-family: "Noto Sans Mono", monospace;
+
+  position-area: bottom span-all;
+  position-try-fallbacks:
+    top span-all,
+    bottom span-right,
+    top span-right,
+    bottom span-left,
+    top span-left;
+
+  position-visibility: no-overflow;
+
+  &:popover-open {
+    transform: translateY(0);
+    opacity: 1;
+  }
+
+  > h1:first-child,
+  h2:first-child,
+  h3:first-child {
+    margin-top: 0;
+    text-align: center;
+  }
+}
+
+[popover="auto"] {
+  transform: $translate;
+}
+
+[popover="hint"] {
+  margin-top: 0.5rem;
+  font-size: 0.9rem;
+}
+
+@starting-style {
+  [popover]:popover-open {
+    opacity: 0;
+  }
+
+  [popover="auto"] {
+    transform: $translate;
+  }
+}
--- a/src/lib/style/form/_button.scss
+++ b/src/lib/style/form/_button.scss
@@ -5,31 +5,30 @@ a {
 a,
 label:has(input),
 button {
-  cursor: pointer;
-
  display: flex;
-  gap: 4px;
-  align-items: center;
  justify-content: center;
+  align-items: center;
+  gap: 4px;
+  transition: all 250ms ease;
+  cursor: pointer;
+  border-radius: 32px;
+  padding-inline: 16px;
+  padding-block: 8px;

  width: max-content;
  height: 48px;
-  padding-block: 8px;
-  padding-inline: 16px;
+  font-weight: 600;

  font-family: inherit;
-  font-weight: 600;
-  border-radius: 32px;
-  transition: all 250ms ease;

  @media not (forced-colors: active) {
-    color: currentcolor;
-    background: transparent;
    border: none;
+    background: transparent;
+    color: currentcolor;

    &.primary {
-      color: var(--md-sys-color-on-primary);
      background: var(--md-sys-color-primary);
+      color: var(--md-sys-color-on-primary);
    }
  }

@@ -40,17 +39,17 @@ button {

  &.icon {
    display: inline-flex;
+    border-radius: 50%;
+    padding-inline: 0;
+    padding-block: 0;

    aspect-ratio: 1;
-    padding-block: 0;
-    padding-inline: 0;

    font-size: 24px;
-    border-radius: 50%;

    @media (forced-colors: active) {
-      padding: 2px;
      margin: 2px;
+      padding: 2px;
    }
  }

@@ -88,8 +87,8 @@ button {
    }
    &.active,
    &:active {
-      color: SelectedItemText;
      background: SelectedItem;
+      color: SelectedItemText;
    }
  }
 }
--- a/src/lib/style/form/_checkbox.scss
+++ b/src/lib/style/form/_checkbox.scss
--- a/src/lib/style/form/_radio.scss
+++ b/src/lib/style/form/_radio.scss
@@ -0,0 +1,35 @@
+label:has(input[type="radio"]) {
+  z-index: 1;
+
+  transition: all 250ms ease;
+  cursor: pointer;
+  border: none;
+  border-radius: 0;
+
+  background: var(--md-sys-color-surface-variant);
+  padding-inline: 12px;
+
+  aspect-ratio: unset;
+  height: 1.5em;
+  color: var(--md-sys-color-on-surface-variant);
+
+  font-size: 16px;
+
+  > input[type="radio"] {
+    display: none;
+  }
+
+  &:first-child {
+    border-radius: 16px 0 0 16px;
+  }
+
+  &:last-child {
+    border-radius: 0 16px 16px 0;
+  }
+
+  &:has(:checked) {
+    background: var(--md-sys-color-tertiary);
+    color: var(--md-sys-color-on-tertiary);
+    font-weight: 900;
+  }
+}
--- a/src/lib/style/form/_toggle.scss
+++ b/src/lib/style/form/_toggle.scss
@@ -3,57 +3,55 @@ $border: 2px;
 $height: 1.5em;

 label:has(input[type="checkbox"]) {
-  cursor: pointer;
-  user-select: none;
-
  display: flex;
-  gap: $padding;
-  align-items: center;
  justify-content: center;
+  align-items: center;
+  gap: $padding;
+  cursor: pointer;

  font-size: 12px;
+  user-select: none;

  input[type="checkbox"] {
    $width: calc($height * (5 / 3));
    $diameter: calc($height - ((2 * $padding) + (2 * $border)));
    $radius: calc($diameter / 2);
-
-    cursor: pointer;
+    display: flex;

    position: relative;

-    overflow: hidden;
-    display: flex;
+    cursor: pointer;
+
+    outline: $border solid currentcolor;
+    outline-offset: calc(-1 * $border);
+    border-radius: calc($height / 2);

    width: $width;
    height: $height;

-    font-size: inherit;
+    overflow: hidden;
    color: inherit;

-    border-radius: calc($height / 2);
-    outline: $border solid currentcolor;
-    outline-offset: calc(-1 * $border);
+    font-size: inherit;

    &::after {
-      content: "";
+      display: block;

      position: absolute;
      top: calc($padding + $border);
      left: calc($padding + $border);

-      display: block;
+      transition: all 250ms ease;

-      width: $diameter;
-      height: $diameter;
-
-      border-radius: calc($radius);
      outline-color: inherit;
      outline-style: solid;
      outline-width: $radius;
      outline-offset: calc(-1 * $radius);
+      border-radius: calc($radius);

-      transition: all 250ms ease;
+      width: $diameter;
+      height: $diameter;
+      content: "";
    }

    &:checked::after {
@@ -62,4 +60,83 @@ label:has(input[type="checkbox"]) {
      outline-offset: calc($padding / 2);
    }
  }
+
+  &:has(span.icon) {
+    $line-width: 10%;
+    $side: calc(($line-width * 2) / sqrt(2));
+    $mid: calc($side / 2);
+
+    > input[type="checkbox"] {
+      display: none;
+    }
+
+    > span.icon {
+      display: block;
+      position: relative;
+
+      clip-path: polygon(
+        0% $side,
+        $mid $mid,
+        calc(100% - $mid) calc(100% - $mid),
+        calc(100% - $side) 100%,
+        0% 100%,
+        0% $side,
+        $side 0%,
+        100% calc(100% - $side),
+        calc(100% - $side) 100%,
+        calc(100% - $side) 100%,
+        100% calc(100% - $side),
+        100% calc(100% - $side),
+        100% 0%,
+        $side 0%
+      );
+
+      transition: all 250ms ease;
+
+      width: 1em;
+      height: 1em;
+
+      font-size: inherit;
+
+      &::before {
+        display: block;
+
+        position: absolute;
+        top: 50%;
+        left: 50%;
+        transform: translate(-50%, 0) rotate(45deg);
+
+        transition: all 250ms ease;
+
+        background-color: currentcolor;
+
+        width: calc(100% * sqrt(2));
+        height: $line-width;
+        content: "";
+      }
+    }
+
+    &:has(:checked) > span.icon {
+      clip-path: polygon(
+        0% $side,
+        $mid $mid,
+        calc(100% - $mid) calc(100% - $mid),
+        calc(100% - $side) 100%,
+        0% 100%,
+        0% $side,
+        $side 0%,
+        100% calc(100% - $side),
+        calc(100% - $side) 100%,
+        0% $side,
+        $side 0%,
+        100% calc(100% - $side),
+        100% 0%,
+        $side 0%
+      );
+
+      &::before {
+        transform: translate(-50%, 0) rotate(45deg) translateX(-100%);
+      }
+    }
+  }
 }
--- a/src/lib/style/scrollbar.scss
+++ b/src/lib/style/scrollbar.scss
@@ -1,14 +1,14 @@
@media not (forced-colors: active) {
  ::-webkit-scrollbar {
-    width: 8px;
-    background: transparent;
    border-radius: 4px;
+    background: transparent;
+    width: 8px;
  }

  ::-webkit-scrollbar-thumb {
-    background: var(--scrollbar-color, white);
-    border-radius: 4px;
    transition: all 250ms ease;
+    border-radius: 4px;
+    background: var(--scrollbar-color, white);

    &:hover {
      filter: brightness(120%);
--- a/src/lib/style/theme.scss
+++ b/src/lib/style/theme.scss
@@ -2,34 +2,35 @@

@use "form/button";
@use "form/toggle";
-@use "form/checkbox";
+@use "form/radio";

@use "kbd";
@use "print";

@use "elements/h1";
+@use "elements/popover";

 body {
-  overflow: hidden;
  display: flex;
  flex-direction: column;
+  margin: 0;
+
+  background: var(--md-sys-color-background);

  width: 100vw;
  height: 100vh;
-  margin: 0;
-
-  font-family: "Noto Sans Mono", monospace;
+  overflow: hidden;
  color: var(--md-sys-color-on-background);

-  background: var(--md-sys-color-background);
+  font-family: "Noto Sans Mono", monospace;
 }

 main {
-  contain: strict;
  display: flex;
-  flex-direction: column;
  flex-grow: 1;
+  flex-direction: column;
  align-items: center;
+  contain: strict;

  padding-inline: 16px;
 }
--- a/src/lib/style/tippy.scss
+++ b/src/lib/style/tippy.scss
@@ -1,10 +1,10 @@
 $padding: 16px;

 .tippy-box[data-theme~="surface-variant"] {
-  color: var(--md-sys-color-on-surface-variant);
-  background-color: var(--md-sys-color-surface-variant);
  filter: drop-shadow(0 0 12px #000a);
  border-radius: calc(24px + $padding);
+  background-color: var(--md-sys-color-surface-variant);
+  color: var(--md-sys-color-on-surface-variant);

  .tippy-content {
    padding: $padding;
@@ -24,10 +24,10 @@ $padding: 16px;
  }

  @media (forced-colors: active) {
-    color: CanvasText;
-    background-color: Canvas;
    filter: none;
    border: 1px solid CanvasText;
+    background-color: Canvas;
+    color: CanvasText;

    > .tippy-arrow {
      display: none;
@@ -36,16 +36,16 @@ $padding: 16px;
 }

 .tippy-box[data-theme~="tooltip"] {
-  color: var(--md-sys-color-on-background);
-  background-color: var(--md-sys-color-background);
  border: 1px solid var(--md-sys-color-outline);
  border-radius: 8px;
+  background-color: var(--md-sys-color-background);
+  color: var(--md-sys-color-on-background);
 }

 .tippy-box[data-theme~="search-completion"] {
-  overflow: hidden;
  filter: none;
  border-radius: 0 0 16px 16px;
+  overflow: hidden;

  .tippy-content {
    padding: 0;
--- a/src/lib/title.ts
+++ b/src/lib/title.ts
@@ -1,43 +1,43 @@
-import type { Action } from "svelte/action";
 import tippy from "tippy.js";
-import { mount, unmount, type SvelteComponent } from "svelte";
+import { mount, unmount, type Snippet } from "svelte";
 import Tooltip from "$lib/components/Tooltip.svelte";
+import type { Attachment } from "svelte/attachments";

 export const hotkeys = new Map<string, HTMLElement>();

-export const action: Action<Element, { title?: string; shortcut?: string }> = (
-  node: Element,
-  { title, shortcut },
-) => {
-  let component: {} | undefined;
-  const tooltip = tippy(node, {
-    arrow: false,
-    theme: "tooltip",
-    animation: "fade",
-    onShow(instance) {
-      component ??= mount(Tooltip, {
-        target: instance.popper.querySelector(".tippy-content") as Element,
-        props: { title, shortcut },
-      });
-    },
-    onHidden() {
-      if (component) {
-        unmount(component);
-        component = undefined;
-      }
-    },
-  });
+export function actionTooltip(
+  title: string | Snippet,
+  shortcut?: string,
+): Attachment<Element> {
+  return (node: Element) => {
+    let component: {} | undefined;
+    const tooltip = tippy(node, {
+      arrow: false,
+      theme: "tooltip",
+      animation: "fade",
+      onShow(instance) {
+        component ??= mount(Tooltip, {
+          target: instance.popper.querySelector(".tippy-content") as Element,
+          props: { shortcut, title },
+        });
+      },
+      onHidden() {
+        if (component) {
+          unmount(component);
+          component = undefined;
+        }
+      },
+    });

-  if (shortcut && node instanceof HTMLElement) {
-    hotkeys.set(shortcut, node);
-  }
+    if (shortcut && node instanceof HTMLElement) {
+      hotkeys.set(shortcut, node);
+    }

-  return {
-    destroy() {
+    return () => {
      tooltip.destroy();
      if (shortcut && node instanceof HTMLElement) {
        hotkeys.delete(shortcut);
      }
-    },
+    };
  };
-};
+}
--- a/src/lib/undo-redo.ts
+++ b/src/lib/undo-redo.ts
@@ -19,6 +19,7 @@ export interface LayoutChange {
  id: number;
  layer: number;
  action: number;
+  profile?: number;
 }

 export interface ChordChange {
@@ -33,6 +34,7 @@ export interface SettingChange {
  type: ChangeType.Setting;
  id: number;
  setting: number;
+  profile?: number;
 }

 export interface ChangeInfo {
@@ -45,23 +47,29 @@ export type Change = LayoutChange | ChordChange | SettingChange;
 export const changes = persistentWritable<Change[][]>("changes", []);

 export interface Overlay {
-  layout: [Map<number, number>, Map<number, number>, Map<number, number>];
+  layout: Array<Array<Map<number, number> | undefined> | undefined>;
  chords: Map<string, Chord & { deleted: boolean }>;
-  settings: Map<number, number>;
+  settings: Array<Map<number, number> | undefined>;
 }

 export const overlay = derived(changes, (changes) => {
  const overlay: Overlay = {
-    layout: [new Map(), new Map(), new Map()],
+    layout: [],
    chords: new Map(),
-    settings: new Map(),
+    settings: [],
  };

  for (const changeset of changes) {
    for (const change of changeset) {
      switch (change.type) {
        case ChangeType.Layout:
-          overlay.layout[change.layer]?.set(change.id, change.action);
+          change.profile ??= 0;
+          overlay.layout[change.profile] ??= [];
+          overlay.layout[change.profile]![change.layer] ??= new Map();
+          overlay.layout[change.profile]![change.layer]!.set(
+            change.id,
+            change.action,
+          );
          break;
        case ChangeType.Chord:
          overlay.chords.set(JSON.stringify(change.id), {
@@ -71,7 +79,9 @@ export const overlay = derived(changes, (changes) => {
          });
          break;
        case ChangeType.Setting:
-          overlay.settings.set(change.id, change.setting);
+          change.profile ??= 0;
+          overlay.settings[change.profile] ??= new Map();
+          overlay.settings[change.profile]!.set(change.id, change.setting);
          break;
      }
    }
@@ -82,21 +92,25 @@ export const overlay = derived(changes, (changes) => {

 export const settings = derived(
  [overlay, deviceSettings],
-  ([overlay, settings]) =>
-    settings.map<{ value: number } & ChangeInfo>((value, id) => ({
-      value: overlay.settings.get(id) ?? value,
-      isApplied: !overlay.settings.has(id),
-    })),
+  ([overlay, profiles]) =>
+    profiles.map((settings, profile) =>
+      settings.map<{ value: number } & ChangeInfo>((value, id) => ({
+        value: overlay.settings[profile]?.get(id) ?? value,
+        isApplied: !overlay.settings[profile]?.has(id),
+      })),
+    ),
 );

 export type KeyInfo = { action: number } & ChangeInfo;
-export const layout = derived([overlay, deviceLayout], ([overlay, layout]) =>
-  layout.map(
-    (actions, layer) =>
-      actions.map<KeyInfo>((action, id) => ({
-        action: overlay.layout[layer]?.get(id) ?? action,
-        isApplied: !overlay.layout[layer]?.has(id),
-      })) as [KeyInfo, KeyInfo, KeyInfo],
+export const layout = derived([overlay, deviceLayout], ([overlay, profiles]) =>
+  profiles.map((layout, profile) =>
+    layout.map(
+      (actions, layer) =>
+        actions.map<KeyInfo>((action, id) => ({
+          action: overlay.layout[profile]?.[layer]?.get(id) ?? action,
+          isApplied: !overlay.layout[profile]?.[layer]?.has(id),
+        })) as [KeyInfo, KeyInfo, KeyInfo],
+    ),
  ),
 );

@@ -165,6 +179,22 @@ export const chords = derived(
  },
 );

+export const duplicateChords = derived(chords, (chords) => {
+  const duplicates = new Set<string>();
+  const seen = new Set<string>();
+
+  for (const chord of chords) {
+    const key = JSON.stringify(chord.actions);
+    if (seen.has(key)) {
+      duplicates.add(key);
+    } else {
+      seen.add(key);
+    }
+  }
+
+  return duplicates;
+});
+
 export const chordHashes = derived(
  chords,
  (chords) =>
--- a/src/lib/util/from-readable.ts
+++ b/src/lib/util/from-readable.ts
@@ -0,0 +1,10 @@
+import { Observable } from "rxjs";
+import type { Readable } from "svelte/store";
+
+export function fromReadable<T>(store: Readable<T>): Observable<T> {
+  return new Observable((subscriber) =>
+    store.subscribe((value) => {
+      subscriber.next(value);
+    }),
+  );
+}
--- a/src/routes/(app)/+layout.svelte
+++ b/src/routes/(app)/+layout.svelte
@@ -11,7 +11,7 @@
    argbFromHex,
    themeFromSourceColor,
  } from "@material/material-color-utilities";
-  import { canAutoConnect } from "$lib/serial/device";
+  import { canAutoConnect, getViablePorts } from "$lib/serial/device";
  import { initSerial } from "$lib/serial/connection";
  import type { LayoutData } from "./$types";
  import { browser } from "$app/environment";
@@ -52,9 +52,21 @@

  onMount(async () => {
    theme.subscribe((it) => {
-      const theme = themeFromSourceColor(argbFromHex(it.color));
+      const theme = themeFromSourceColor(argbFromHex(it.color), [
+        {
+          name: "success",
+          value: argbFromHex("#4CAF50"),
+          blend: true,
+        },
+      ]);
      const dark = it.mode === "dark"; // window.matchMedia("(prefers-color-scheme: dark)").matches
      applyTheme(theme, { target: document.body, dark });
+      for (const custom of theme.customColors) {
+        document.body.style.setProperty(
+          `--md-sys-color-${custom.color.name}`,
+          `#${custom.value.toString(16).padStart(8, "0").substring(2)}`,
+        );
+      }
    });

    if (import.meta.env.TAURI_FAMILY === undefined) {
@@ -63,7 +75,8 @@
    }

    if (browser && $userPreferences.autoConnect && (await canAutoConnect())) {
-      await initSerial();
+      const [port] = await getViablePorts();
+      await initSerial(port!, true);
    }

    if (data.importFile) {
@@ -118,8 +131,6 @@
 <div class="layout">
  <Sidebar />

-  <!-- <PickChangesDialog /> -->
-
  <PageTransition>
    {#if children}
      {@render children()}
@@ -131,14 +142,13 @@

 <style lang="scss">
  .layout {
-    width: 100vw;
-    height: 100vh;
-
    display: grid;
+    grid-template-rows: 1fr;
+    grid-template-columns: auto 1fr;
    grid-template-areas:
      "sidebar main"
      "sidebar footer";
-    grid-template-columns: auto 1fr;
-    grid-template-rows: 1fr;
+    width: 100vw;
+    height: 100vh;
  }
 </style>
--- a/src/routes/(app)/BrowserWarning.svelte
+++ b/src/routes/(app)/BrowserWarning.svelte
@@ -26,17 +26,17 @@
  dialog {
    display: flex;
    flex-direction: column;
-    align-items: center;
    justify-content: center;
+    align-items: center;
+    border: none;
+
+    background: var(--md-sys-color-error);

    width: 100vw;
    height: 100vh;

    color: var(--md-sys-color-on-error);

-    background: var(--md-sys-color-error);
-    border: none;
-
    > * {
      max-width: 20cm;
    }
@@ -54,8 +54,8 @@

  div > p {
    display: flex;
-    gap: 8px;
    align-items: center;
+    gap: 8px;
    list-style: none;
  }

--- a/src/routes/(app)/ConnectPopup.svelte
+++ b/src/routes/(app)/ConnectPopup.svelte
@@ -0,0 +1,235 @@
+<script lang="ts">
+  import LL from "$i18n/i18n-svelte";
+  import { preference, userPreferences } from "$lib/preferences";
+  import { initSerial } from "$lib/serial/connection";
+  import {
+    getPortName,
+    PORT_FILTERS,
+    type SerialPortLike,
+  } from "$lib/serial/device";
+  import { showConnectionFailedDialog } from "$lib/dialogs/connection-failed-dialog";
+  import { onMount } from "svelte";
+  import { persistentWritable } from "$lib/storage";
+
+  let ports = $state<SerialPort[]>([]);
+  let element: HTMLDivElement | undefined = $state();
+
+  onMount(() => {
+    refreshPorts();
+  });
+
+  let hasDiscoveredAutoConnect = persistentWritable(
+    "hasDiscoveredAutoConnect",
+    false,
+  );
+
+  $effect(() => {
+    if ($userPreferences.backup || $userPreferences.autoConnect) {
+      $hasDiscoveredAutoConnect = true;
+    }
+  });
+
+  async function refreshPorts() {
+    ports = await navigator.serial.getPorts();
+  }
+
+  async function connect(port: SerialPortLike, withSync: boolean) {
+    try {
+      await initSerial(port, withSync);
+    } catch (error) {
+      console.error(error);
+      await showConnectionFailedDialog(String(error));
+    }
+  }
+
+  function closePopover() {
+    element?.closest<HTMLElement>("[popover]")?.hidePopover();
+  }
+
+  async function connectCC0(event: MouseEvent) {
+    const { fetchCCOS } = await import("$lib/ccos/ccos");
+    closePopover();
+    const ccos = await fetchCCOS();
+    if (ccos) {
+      connect(ccos, !event.shiftKey);
+    }
+  }
+
+  async function connectDevice(event: MouseEvent) {
+    const port = await navigator.serial.requestPort({
+      filters: event.shiftKey ? [] : [...PORT_FILTERS.values()],
+    });
+    if (!port) return;
+    closePopover();
+    refreshPorts();
+    connect(port, true);
+  }
+</script>
+
+<div
+  bind:this={element}
+  class="device-list"
+  onmouseenter={() => refreshPorts()}
+  role="region"
+>
+  {#if ports.length === 1}
+    <fieldset class:promote={!$hasDiscoveredAutoConnect}>
+      <label
+        ><input type="checkbox" use:preference={"autoConnect"} />
+        <div class="title">{$LL.deviceManager.AUTO_CONNECT()}</div>
+      </label>
+
+      <label
+        ><input type="checkbox" use:preference={"backup"} />
+        <div class="title">{@html $LL.backup.AUTO_BACKUP()}</div>
+      </label>
+    </fieldset>
+  {/if}
+  {#if ports.length !== 0}
+    <h4>Recent Devices</h4>
+    <div class="devices">
+      <div class="device">
+        <button onclick={connectCC0}> CC0</button>
+      </div>
+      {#each ports as port}
+        <div class="device">
+          <button
+            onclick={(event) => {
+              connect(port, !event.shiftKey);
+            }}
+          >
+            {getPortName(port)}</button
+          >
+          <button
+            class="error"
+            onclick={() => {
+              port.forget();
+              refreshPorts();
+            }}><span class="icon">visibility_off</span> Hide</button
+          >
+        </div>
+      {/each}
+    </div>
+  {/if}
+  <div class="pair">
+    <button onclick={connectDevice} class="primary"
+      ><span class="icon">add</span>Connect</button
+    >
+    <a href="/ccos/zero_wasm/"><span class="icon">add</span>Virtual Device</a>
+  </div>
+</div>
+
+<style lang="scss">
+  button,
+  a {
+    padding: 10px;
+    padding-inline-end: 16px;
+    height: 38px;
+    font-size: 12px;
+
+    .icon {
+      font-size: 18px;
+    }
+  }
+
+  h4 {
+    margin-block-start: 16px;
+    margin-block-end: 8px;
+    font-weight: 600;
+  }
+
+  .device-list {
+    margin: 8px;
+  }
+
+  .pair {
+    display: flex;
+  }
+
+  .devices {
+    margin-bottom: 16px;
+  }
+
+  .device {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+
+    button {
+      flex: 1;
+      justify-content: flex-start;
+      font-size: 14px;
+    }
+  }
+
+  button.error {
+    color: var(--md-sys-color-error);
+  }
+
+  label {
+    display: flex;
+    position: relative;
+    flex-wrap: wrap;
+    justify-content: flex-start;
+    align-items: flex-start;
+    gap: 8px;
+    appearance: none;
+    padding: 0;
+    height: auto;
+    overflow: hidden;
+
+    .title {
+      font-weight: 600;
+    }
+  }
+
+  @keyframes attention {
+    0%,
+    100% {
+      filter: brightness(1);
+    }
+
+    50% {
+      filter: brightness(0.6);
+    }
+  }
+
+  @keyframes swoosh {
+    0% {
+      transform: translateX(-200%) skewX(-20deg);
+      opacity: 0;
+    }
+
+    50% {
+      opacity: 1;
+    }
+
+    100% {
+      transform: translateX(200%) skewX(-20deg);
+      opacity: 0;
+    }
+  }
+
+  .promote {
+    label:not(:has(input:checked)) {
+      animation: attention 1s ease;
+
+      &::after {
+        position: absolute;
+        z-index: -1;
+        animation: swoosh 1s ease forwards;
+        background-color: var(--md-sys-color-surface-variant);
+        width: 25%;
+        height: 200%;
+        content: "";
+      }
+    }
+  }
+
+  fieldset {
+    display: flex;
+    gap: 16px;
+    border: none;
+    padding: 0;
+  }
+</style>
--- a/src/routes/(app)/Footer.svelte
+++ b/src/routes/(app)/Footer.svelte
@@ -1,22 +1,20 @@
 <script lang="ts">
  import { browser, version } from "$app/environment";
-  import { action } from "$lib/title";
+  import { actionTooltip } from "$lib/title";
  import LL, { setLocale } from "$i18n/i18n-svelte";
  import { theme } from "$lib/preferences.js";
  import type { Locales } from "$i18n/i18n-types";
-  import { detectLocale, locales } from "$i18n/i18n-util";
+  import { detectLocale } from "$i18n/i18n-util";
  import { loadLocaleAsync } from "$i18n/i18n-util.async";
  import { tick } from "svelte";
-  import SyncOverlay from "./SyncOverlay.svelte";
  import {
-    initSerial,
    serialPort,
    sync,
    syncProgress,
    syncStatus,
  } from "$lib/serial/connection";
  import { fade, slide } from "svelte/transition";
-  import { showConnectionFailedDialog } from "$lib/dialogs/connection-failed-dialog";
+  import ConnectPopup from "./ConnectPopup.svelte";

  let locale = $state(
    (browser && (localStorage.getItem("locale") as Locales)) || detectLocale(),
@@ -48,32 +46,21 @@
    }
  }

-  async function connect() {
-    try {
-      await initSerial(true);
-    } catch (error) {
-      console.error(error);
-      await showConnectionFailedDialog(String(error));
-    }
-  }
-
  function disconnect(event: MouseEvent) {
    if (event.shiftKey) {
      sync();
    } else {
-      $serialPort?.forget();
+      $serialPort?.close();
      $serialPort = undefined;
    }
  }
-
-  let languageSelect: HTMLSelectElement;
 </script>

 <footer>
  <ul>
    <li>
      <a
-        use:action={{ title: "Branch" }}
+        {@attach actionTooltip("Branch")}
        href={import.meta.env.VITE_HOMEPAGE_URL}
        rel="noreferrer"
        target="_blank"><span class="icon">commit</span> v{version}</a
@@ -82,24 +69,36 @@
    <li>
      <a
        href="/ccos/{currentDevice ? `${currentDevice}/` : ''}"
-        use:action={{ title: "Updates" }}
+        {@attach actionTooltip("Updates")}
      >
        CCOS {$serialPort?.version ?? "Updates"}
      </a>
    </li>
  </ul>
-  <div class="sync-box">
+  <div
+    class="sync-box"
+    class:primary={!$serialPort}
+    class:attention={$syncStatus !== "done"}
+  >
    {#if !$serialPort}
-      <button class="warning" onclick={connect} transition:slide={{ axis: "x" }}
+      <button
+        class="no-connection"
+        id="connect-button"
+        popovertarget="connect-popup"
+        transition:slide={{ axis: "x" }}
        ><span class="icon">usb</span>{$LL.deviceManager.CONNECT()}</button
      >
+      <div popover id="connect-popup">
+        <ConnectPopup />
+      </div>
    {:else}
+      {#snippet disconnectTooltip()}
+        Disconnect<br /><kbd class="icon">shift</kbd> Sync
+      {/snippet}
      <button
        transition:slide={{ axis: "x" }}
        onclick={disconnect}
-        use:action={{
-          title: "Disconnect<br><kbd class='icon'>shift</kbd> Sync",
-        }}
+        {@attach actionTooltip(disconnectTooltip)}
        ><b
          >{$serialPort.company}
          {$serialPort.device}
@@ -108,7 +107,7 @@
      >
    {/if}

-    {#if $syncStatus !== "done"}
+    {#if $syncStatus === "downloading"}
      <progress
        transition:fade
        max={$syncProgress?.max ?? 1}
@@ -129,7 +128,7 @@
    </li>
    <li class="hide-forced-colors">
      <input
-        use:action={{ title: $LL.profile.theme.COLOR_SCHEME() }}
+        {@attach actionTooltip($LL.profile.theme.COLOR_SCHEME())}
        type="color"
        bind:value={$theme.color}
      />
@@ -137,7 +136,7 @@
    <li class="hide-forced-colors">
      {#if $theme.mode === "light"}
        <button
-          use:action={{ title: $LL.profile.theme.DARK_MODE() }}
+          {@attach actionTooltip($LL.profile.theme.DARK_MODE())}
          class="icon"
          onclick={switchTheme}
        >
@@ -145,7 +144,7 @@
        </button>
      {:else if $theme.mode === "dark"}
        <button
-          use:action={{ title: $LL.profile.theme.LIGHT_MODE() }}
+          {@attach actionTooltip($LL.profile.theme.LIGHT_MODE())}
          class="icon"
          onclick={switchTheme}
        >
@@ -153,47 +152,59 @@
        </button>
      {/if}
    </li>
-    <!--<li>
-      <div
-        role="button"
-        class="icon"
-        use:action={{ title: $LL.profile.LANGUAGE() }}
-        onclick={() => languageSelect.click()}
-      >
-        translate
-
-        <select bind:value={locale} bind:this={languageSelect}>
-          {#each locales as code}
-            <option value={code}>{code}</option>
-          {/each}
-        </select>
-      </div>
-    </li>-->
  </ul>
 </footer>

 <style lang="scss">
+  @keyframes attention {
+    0%,
+    100% {
+      filter: brightness(0.5);
+    }
+    50% {
+      filter: brightness(1);
+    }
+  }
+
+  $sync-border-radius: 16px;
+
  .sync-box {
    display: flex;
-    align-items: center;
-    justify-content: center;
    position: relative;
+    justify-content: center;
+    align-items: center;
+    translate: 0;
+    transition: all 250ms ease;
+    border-radius: 24px;
+    overflow: hidden;

    button {
      text-wrap: nowrap;
    }
+
+    &.primary {
+      translate: 0 -32px;
+      background: var(--md-sys-color-primary);
+      color: var(--md-sys-color-on-primary);
+    }
+
+    &.attention {
+      animation: attention 2s infinite;
+      border-radius: $sync-border-radius;
+      color: var(--md-sys-color-primary);
+    }
  }

  progress {
+    $inset: 8px;
    position: absolute;
+    opacity: 0.3;
    z-index: -1;
-    bottom: 0;
-    left: 16px;
-    right: 16px;
+    inset: $inset;
+    border-radius: #{$sync-border-radius - $inset};
+    width: calc(100% - $inset * 2);
+    height: calc(100% - $inset * 2);
    overflow: hidden;
-    width: calc(100% - 32px);
-    height: 8px;
-    border-radius: 4px;
  }

  progress::-webkit-progress-bar {
@@ -204,33 +215,25 @@
    background: var(--md-sys-color-primary);
  }

-  .warning {
-    color: var(--md-sys-color-error);
-    gap: 8px;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-  }
-
  input[type="color"] {
-    cursor: pointer;
-
-    overflow: hidden;
    display: flex;
-    align-items: center;
    justify-content: center;
+    align-items: center;
+    cursor: pointer;
+    margin: 0;
+    border: none;
+    border-radius: 50%;
+
+    background: transparent;
+    padding: 0;

    inline-size: 20px;
    block-size: 20px;
-    margin: 0;
-    padding: 0;
+
+    overflow: hidden;

    color: inherit;

-    background: transparent;
-    border: none;
-    border-radius: 50%;
-
    &::-webkit-color-swatch-wrapper {
      padding: 0;
    }
@@ -242,16 +245,15 @@

  footer {
    display: grid;
-    align-items: center;
-    justify-content: center;
    grid-template-columns: 1fr auto 1fr;
+    justify-content: center;
+    align-items: center;

-    width: 100%;
    padding: 8px;
    padding-inline-end: 16px;
    padding-block-start: 0;

-    opacity: 0.4;
+    width: 100%;

    @media (prefers-contrast: more) {
      opacity: 0.8;
@@ -264,8 +266,8 @@

  ul {
    display: flex;
-    gap: 8px;
    align-items: center;
+    gap: 8px;

    margin: 0;
    padding: 0;
@@ -288,13 +290,13 @@

  a {
    display: flex;
-    align-items: center;
    justify-content: center;
+    align-items: center;
+
+    padding-inline: 12px;

    font-size: 12px;
    text-decoration: none;
-
-    padding-inline: 12px;
  }

  .icon {
--- a/src/routes/(app)/Sidebar.svelte
+++ b/src/routes/(app)/Sidebar.svelte
@@ -1,16 +1,20 @@
 <script lang="ts">
  import { page } from "$app/stores";
+  import { deviceMeta } from "$lib/serial/connection";

-  const routes = [
+  let routes = $derived([
    [
      {
        href: "/config/settings/",
-        icon: "cable",
-        title: "Device",
+        icon: "tune",
+        title: "Settings",
        primary: true,
      },
      { href: "/config/chords/", icon: "dictionary", title: "Library" },
      { href: "/config/layout/", icon: "keyboard", title: "Layout" },
+      ...($deviceMeta?.recipes
+        ? [{ href: "/recipes", icon: "skillet", title: "Cookbook" }]
+        : []),
    ],
    [
      {
@@ -47,7 +51,7 @@
    wip?: boolean;
    external?: boolean;
    primary?: boolean;
-  }[][];
+  }[][]);

  let connectButton: HTMLButtonElement;
 </script>
@@ -81,15 +85,15 @@

 <style lang="scss">
  .sidebar {
-    margin: 8px;
-    padding-inline-end: 8px;
-    width: 64px;
    display: flex;
-    flex-direction: column;
-    justify-content: space-between;

    grid-area: sidebar;
+    flex-direction: column;
+    justify-content: space-between;
+    margin: 8px;
    border-right: 1px solid var(--md-sys-color-outline);
+    padding-inline-end: 8px;
+    width: 64px;
  }

  li {
@@ -104,18 +108,18 @@
    font-size: 12px;

    &.wip {
-      color: var(--md-sys-color-error);
      opacity: 0.5;
+      color: var(--md-sys-color-error);
    }

    .icon {
      display: flex;
      justify-content: center;
-      font-size: 24px;
-      padding: 8px;
-      border-radius: 8px;

      transition: all 250ms ease;
+      border-radius: 8px;
+      padding: 8px;
+      font-size: 24px;
    }

    > .content {
@@ -132,24 +136,24 @@
      }

      .icon {
+        border-radius: 50%;
        background: var(--md-sys-color-primary);
        color: var(--md-sys-color-on-primary);
-        border-radius: 50%;
      }
    }
  }

  ul {
-    list-style: none;
-    padding: 0;
    margin: 0;
+    padding: 0;
+    list-style: none;
  }

  ul + ul::before {
-    content: "";
    display: block;
-    height: 1px;
-    background: var(--md-sys-color-outline);
    margin: 16px 0;
+    background: var(--md-sys-color-outline);
+    height: 1px;
+    content: "";
  }
 </style>
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Thea Schöbl	6ceb3994e7	feat: cv2	2026-01-09 21:36:35 +01:00
Thea Schöbl	156825a194	feat: cv2	2026-01-09 21:33:41 +01:00
Thea Schöbl	4bc84b5399	feat: cv2	2026-01-09 14:42:33 +01:00
Thea Schöbl	82dd08f2a2	feat: update stuff	2025-12-18 16:29:30 +01:00
Thea Schöbl	9f65b4bb6c	fix: action selector update dependencies	2025-12-18 15:35:33 +01:00
Thea Schöbl	e08dda40d9	feat: new left/right graphic	2025-12-17 19:58:05 +01:00
Thea Schöbl	a403bf1ac0	improve cv2	2025-12-17 19:42:15 +01:00
Thea Schöbl	1aff1703ac	feat: new chord editor prototype	2025-12-17 17:34:32 +01:00
Thea Schöbl	fe42dcd2ab	fix: crash when saving empty chords	2025-12-12 17:41:54 +01:00
Thea Schöbl	b13c34ca15	fix: oops	2025-12-12 15:19:28 +01:00
Thea Schöbl	4023ab9bd5	feat: better handling of corrupted updates	2025-12-12 15:18:24 +01:00
Thea Schöbl	2893afa2ba	feat: qol improvements	2025-12-11 20:51:32 +01:00
Thea Schöbl	7beab5ac07	fix: autospace cursor wonkyness	2025-11-28 17:33:55 +01:00
Thea Schöbl	6895fa4a82	feat: cookbook	2025-11-28 14:38:51 +01:00
Thea Schöbl	245dd97532	feat: 4th layer support	2025-11-12 18:21:22 +01:00
Thea Schöbl	d84495894a	fix: zero/engine backups should be x backups	2025-10-29 19:52:43 +01:00
Thea Schöbl	1de52f7f81	feat: wasm zero	2025-10-29 18:51:03 +01:00
Thea Schöbl	45682f0d1a	2.6.0	2025-10-22 17:22:34 +02:00
Thea Schöbl	5f0bc45851	fix: issue with importing M4G backups	2025-10-22 16:59:41 +02:00
Thea Schöbl	c6f1f3f6fc	feat: add t4g vid	2025-10-22 16:58:04 +02:00
Thea Schöbl	32c2ce2f45	2.5.0	2025-10-02 13:59:05 +02:00
Thea Schöbl	c6e2f59b05	refactor: rename auto-backup to fast connect	2025-10-02 13:58:01 +02:00
Thea Schöbl	2a872bafac	v2.4.0	2025-09-23 14:14:11 +02:00
Thea Schöbl	a940d1b480	feat: add upgrade flow for pre-2.0.0 (non-OTA) devices	2025-09-23 14:08:14 +02:00
Thea Schöbl	f3b1d76666	feat: t4g support	2025-09-02 18:41:46 +02:00
Thea Schöbl	0b2695a380	refactor: swap stylelint css order plugin for prettier plugin	2025-07-31 13:41:39 +02:00
Thea Schöbl	048dee0a6d	fix: can't select empty chord outputs update dependencies use new title popover	2025-07-29 20:18:13 +02:00
Thea Schöbl	977bdf3043	fix: revamp reset popup	2025-07-29 18:59:11 +02:00
Thea Schöbl	9ca30f412e	feat: update compound calculation feat: add "will my compound break" page	2025-07-29 16:40:54 +02:00
Thea Schöbl	f2a18cafe8	fix: use semver sort for ccos updates	2025-07-29 14:55:02 +02:00
Thea Schöbl	b27182dc35	fix: can't change profiles B/C fix: only add profiles starting beta.4	2025-07-11 17:56:42 +02:00
Thea Schöbl	74ce6af318	feat: profile support	2025-07-11 16:27:19 +02:00
Thea Schöbl	782f1fc38b	feat: autospace toggle	2025-06-13 20:29:05 +02:00
Shane O'Donnell	087ff36d5d	Fix stale search (#189 ) Fixes an issue where, after chord list is updated (e.g. by a deletion), the search results continue to use the old list and indices, resulting in incorrect search results.	2025-06-13 13:22:25 +02:00