diff --git a/src/lib/assets/CC1_Default_Chord_Library.csv b/src/lib/assets/CC1_Default_Chord_Library.csv
deleted file mode 100644
index 2795371d..00000000
--- a/src/lib/assets/CC1_Default_Chord_Library.csv
+++ /dev/null
@@ -1,497 +0,0 @@
-s + Dup,say
-y + b,by
-y + Dup,why
-n + Dup,no
-n + f,find
-l + f,life
-l + p,people
-l + s + p,spell
-l + n,line
-l + n + p,plant
-t + h,that
-t + n + h,than
-t + n + p,plant
-t + l + f,left
-a + f,after
-a + d,add
-a + d + f,had
-a + h,has
-a + s,as
-a + s + h,has
-a + y + d,day
-a + y + s,say
-a + n,an
-a + n + d,and
-a + n + d + f,hand
-a + n + h,hand
-a + n + y,any
-a + l,all
-a + l + d,land
-a + l + p,plant
-a + l + s,last
-a + l + y + p,play
-a + l + n + d,land
-a + t,at
-a + t + h,that
-a + t + n + h,than
-a + t + l + s,last
-a + t + l + n + p,plant
-- + ?,question
-w + h,who
-w + s,saw
-w + y + h,why
-w + t,without
-w + t + h,watch
-w + t + n,went
-w + a,was
-w + a + h,what
-w + a + s,saw
-w + a + y,way
-w + a + y + Dup,away
-w + a + n,want
-w + a + l + f,walk
-w + a + l + y,always
-w + a + l + y + s,always
-w + a + t,watch
-w + a + t + h,watch
-w + a + t + n,want
-g + b,begin
-g + Dup,question
-g + h,here
-g + p,page
-g + l + n,long
-g + t,get
-k + q,quick
-k + f,and
-k + l + y + q,quickly
-k + t + l,talk
-k + a + b,back
-k + a + s,ask
-k + a + t + l,talk
-k + w + a + l,walk
-m + f,form
-m + y,my
-m + t + Dup,mountain
-m + a + f,family
-m + a + s,small
-m + a + y,may
-m + a + n,man
-m + a + n + y,many
-m + a + l,almost
-m + a + l + s,small
-m + a + l + s + Dup,small
-c + b,because
-c + Dup,sea
-c + h,head
-c + a + n,can
-c + a + n + h,change
-c + a + l,call
-c + a + l + p,place
-c + k + a + b,back
-u + p,us
-u + y,you
-u + j,just
-u + j + s,just
-u + t + b,but
-u + t + p,put
-u + t + s + d,study
-u + t + n,until
-u + t + j + s,just
-u + a + l,last
-u + k + q,quick
-u + k + l + y + q,quickly
-u + m + h,much
-u + m + n,number
-u + m + t + s,must
-u + m + c + h,much
-u + c + s + h,such
-u + c + t,cut
-u + c + t + n,country
-' + a + s,say
-' + a + n,any
-' + m + a + n,many
-o + Dup,off
-o + f,of
-o + f + f,food
-o + d,do
-o + s,so
-o + y + b,boy
-o + n,on
-o + n + s + Dup,soon
-o + l,line
-o + l + Dup,oil
-o + l + d,old
-o + l + y,only
-o + l + n + y,only
-o + t,to
-o + t + b,both
-o + t + Dup,too
-o + t + s,stop
-o + t + s + p,stop
-o + t + n,not
-o + t + n + f,often
-o + t + n + d,don't
-o + t + n + p,point
-o + a + n + h,another
-o + a + l,also
-o + a + l + s,also
-o + w,own
-o + w + h,how
-o + w + s + h,show
-o + w + n,now
-o + w + n + d,down
-o + w + l + f,follow
-o + w + t,two
-o + g,go
-o + g + Dup,good
-o + g + n + s,song
-o + g + l + n,long
-o + g + t,got
-o + g + a + l,along
-o + g + a + l + n,along
-o + k + b,book
-o + k + n,know
-o + k + l,look
-o + k + t,took
-o + k + t + Dup,took
-o + k + w + n,know
-o + v + a + b,above
-o + v + k,move
-o + m + s,some
-o + m + t + s,most
-o + m + a + l,almost
-o + m + a + l + s,almost
-o + m + a + t + l + s,almost
-o + c + f,food
-o + c + l + s + h,school
-o + u,our
-o + u + f,four
-o + u + s + h,should
-o + u + y,you
-o + u + n + f,found
-o + u + n + f + f,found
-o + u + n + s,sound
-o + u + n + s + d,sound
-o + u + l + s + d + f,should
-o + u + l + s + h,should
-o + u + t,out
-o + u + a + b,about
-o + u + a + t + b,about
-o + u + w + l + d,would
-o + u + g + n + y,young
-o + u + g + t + h,thought
-o + u + m + t + n,mountain
-o + u + m + t + n + Dup,mountain
-o + u + c + l + d,could
-o + ' + t + n + d,don't
-o + o + l,oil
-o + o + t + n,into
-o + o + t + n + p,point
-o + o + u + w + t + h,without
-o + o + u + m + a + t + n,mountain
-i + f,if
-i + f + f,different
-i + d,did
-i + RH_Thumb_1_Center,different
-i + s,is
-i + s + d,side
-i + s + h,his
-i + n,in
-i + n + f + f,find
-i + l,list
-i + l + n,line
-i + t,it
-i + t + s + Dup,still
-i + t + s + h,this
-i + t + n,into
-i + t + l + s,list
-i + t + l + s + Dup,still
-i + a + s,said
-i + a + s + d,said
-i + a + n,animal
-i + w + h,which
-i + w + h + Dup,which
-i + w + l,will
-i + w + l + Dup,will
-i + w + l + h,while
-i + w + t + h,with
-i + g,give
-i + g + b,big
-i + g + h,high
-i + g + n + h,night
-i + g + l + h,light
-i + g + t + n + h,thing
-i + g + t + l + h,light
-i + g + a + n,again
-i + g + a + n + Dup,again
-i + k + n + d,kind
-i + k + l,like
-i + k + t + n + h,think
-i + v + l,live
-i + m + h,him
-i + m + p,important
-i + m + s,miss
-i + m + s + Dup,miss
-i + m + l,mile
-i + m + t,time
-i + m + t + h,might
-i + m + a + n,animal
-i + m + a + n + Dup,animal
-i + m + a + l + n,another
-i + m + g + t + h,might
-i + c + p,picture
-i + c + t + y,city
-i + u + t + l + n,until
-i + u + w + t + h,without
-i + u + k + q,quick
-i + u + k + l + y + q,quickly
-i + u + c + k + q,quick
-i + u + c + k + l + y + q,quickly
-i + ' + t,it's
-i + ' + t + s,it's
-e + b,be
-e + Dup,earth
-e + x,example
-e + f + b,before
-e + h,he
-e + h + Dup,here
-e + s,state
-e + s + Dup,see
-e + s + h,she
-e + y + Dup,eye
-e + n,name
-e + n + b,been
-e + n + Dup,need
-e + n + d,end
-e + l + h,help
-e + l + h + f,help
-e + l + s + p,spell
-e + t,the
-e + t + Dup,eat
-e + t + f,feet
-e + t + h,there
-e + t + s,set
-e + t + s + h,these
-e + t + y + h,they
-e + t + n + x,next
-e + t + n + h,then
-e + t + l,let
-e + t + l + Dup,tell
-e + t + l + f,left
-e + a,at
-e + a + f,father
-e + a + d + f,head
-e + a + h,hear
-e + a + p,paper
-e + a + s,sea
-e + a + y,year
-e + a + n,name
-e + a + t,eat
-e + a + t + s + Dup,state
-e + w,we
-e + w + f,few
-e + w + n,new
-e + w + n + h,when
-e + w + l,well
-e + w + l + Dup,well
-e + w + t + b,between
-e + w + t + n,went
-e + w + t + n + b,between
-e + g + h,here
-e + g + t,get
-e + g + a + p,page
-e + g + a + n + b,began
-e + k,keep
-e + k + p,keep
-e + k + t,take
-e + k + a + t,take
-e + v + y,every
-e + v + n,even
-e + v + a + h,have
-e + v + a + l,leave
-e + v + a + l + Dup,leave
-e + m,me
-e + m + s,seem
-e + m + s + Dup,seem
-e + m + n,men
-e + m + t + h,them
-e + m + a,make
-e + m + a + d,made
-e + m + a + s,same
-e + m + a + n,mean
-e + m + a + l + p + x,example
-e + m + c + a,came
-e + c + s,second
-e + c + t + n + s,sentence
-e + c + a,came
-e + c + a + f,face
-e + c + a + h,each
-e + c + a + l + p,place
-e + LH_Thumb_1_Center + a,make
-e + u + s,use
-e + u + s + q,question
-e + u + n + d,under
-e + u + t + q,quite
-e + u + c + a + s + b,because
-e + o + p,open
-e + o + s + d,does
-e + o + n,one
-e + o + n + p,open
-e + o + l + b,below
-e + o + l + h,hello
-e + o + l + h + Dup,hello
-e + o + l + p,people
-e + o + t + f,often
-e + o + t + h,other
-e + o + t + s + h,those
-e + o + t + n + f,often
-e + o + w + l + b,below
-e + o + g + t + h,together
-e + o + v,over
-e + o + v + a + b,above
-e + o + v + k,move
-e + o + m,move
-e + o + m + h,home
-e + o + m + s,some
-e + o + m + t + s,sometime
-e + o + m + t + s + h,something
-e + o + m + g + t + n + s + h,something
-e + o + m + c,come
-e + o + c,come
-e + o + c + n,once
-e + o + c + n + s + d,second
-e + o + c + l + s,close
-e + o + u + s + h,house
-e + o + u + n,enough
-e + o + u + g + n + h,enough
-e + i + s + d,side
-e + i + l + f,life
-e + i + l + n,line
-e + i + t + q,quite
-e + i + t + l,little
-e + i + t + l + Dup,little
-e + i + a + d,idea
-e + i + w + l + h,while
-e + i + w + t + h,white
-e + i + g,give
-e + i + g + p,give
-e + i + g + n + b,begin
-e + i + k + l,like
-e + i + v + l,live
-e + i + m + l,mile
-e + i + m + t,time
-e + i + u + t + q,quite
-e + i + u + u + t + n + s + q,question
-r + e + h,her
-r + e + t + Dup,tree
-r + e + t + h,there
-r + e + t + h + Dup,three
-r + e + t + l,letter
-r + e + a,are
-r + e + a + d,read
-r + e + a + h,hear
-r + e + a + p,paper
-r + e + a + n,near
-r + e + a + l + y,really
-r + e + a + l + y + Dup,really
-r + e + a + t + f,after
-r + e + a + t + h,earth
-r + e + a + t + RH_Thumb_1_Center,father
-r + e + a + t + l,learn
-r + e + w,were
-r + e + w + Dup,were
-r + e + w + h,where
-r + e + w + a + n + s,answer
-r + e + w + a + t,water
-r + e + g + h,here
-r + e + g + a + l,large
-r + e + g + a + t,great
-r + e + v + y,very
-r + e + v + y + Dup,every
-r + e + v + n,never
-r + e + u + n + d,under
-r + e + u + m + n + b,number
-r + e + o + f + b,before
-r + e + o + t + h,other
-r + e + o + g + t + h,together
-r + e + o + v,over
-r + e + o + m,more
-r + e + o + m + t + h,mother
-r + e + i + t + h,their
-r + e + i + t + n + f + f,different
-r + e + i + v,river
-r + e + i + c + l + d + f,children
-r + e + i + u + c + t + p,picture
-r + f,for
-r + h,her
-r + y,your
-r + n,near
-r + l,learn
-r + t + Dup,tree
-r + t + f,father
-r + t + s + Dup,start
-r + t + y,try
-r + t + l,letter
-r + t + l + Dup,letter
-r + a,are
-r + a + f,far
-r + a + d,read
-r + a + d + f,hard
-r + a + h,hard
-r + a + p,part
-r + a + l + y,really
-r + a + l + y + Dup,really
-r + a + t + p,part
-r + a + t + s + Dup,start
-r + w,were
-r + w + h,where
-r + w + t,water
-r + w + a + n + s,answer
-r + g + t,great
-r + g + a + l,large
-r + v + y,very
-r + v + n,never
-r + v + l,later
-r + m + f,form
-r + c + a,car
-r + c + a + y,carry
-r + c + a + y + Dup,carry
-r + u + n,run
-r + u + t + h,through
-r + u + t + n,turn
-r + ' + t + s,story
-r + o,or
-r + o + f,for
-r + o + t + y + s,story
-r + o + a + n + h,another
-r + o + w,work
-r + o + w + d,word
-r + o + w + l + d,world
-r + o + g,grow
-r + o + LeftDoubleClick,grow
-r + o + k + w,work
-r + o + m,more
-r + o + m + f,from
-r + o + m + t + h,mother
-r + o + u,our
-r + o + u + f,four
-r + o + u + y,your
-r + o + u + a,around
-r + o + u + a + n,around
-r + o + u + a + n + d,around
-r + o + u + g,group
-r + o + u + g + p,group
-r + o + u + g + t + h,through
-r + o + u + c + t + n,country
-r + o + u + c + t + n + y,country
-r + i + t + h,their
-r + i + t + s + f,first
-r + i + a,air
-r + i + w + t,write
-r + i + g + h,right
-r + i + g + l,girl
-r + i + g + t + h,right
-r + i + v,river
-r + i + v + Dup,river
-r + i + m + t + n + p,important
-r + i + c + l + h,children
\ No newline at end of file
diff --git a/src/lib/components/Action.svelte b/src/lib/components/Action.svelte
index 1ff83707..ceaa0cce 100644
--- a/src/lib/components/Action.svelte
+++ b/src/lib/components/Action.svelte
@@ -11,7 +11,7 @@
 
   let info = $derived(
     typeof action === "number"
-      ? (KEYMAP_CODES.get(action) ?? { code: action })
+      ? ($KEYMAP_CODES.get(action) ?? { code: action })
       : action,
   );
   let dynamicMapping = $derived(info.keyCode && $osLayout.get(info.keyCode));
diff --git a/src/lib/components/ActionListItem.svelte b/src/lib/components/ActionListItem.svelte
index e3ccd1ab..2f60d6a1 100644
--- a/src/lib/components/ActionListItem.svelte
+++ b/src/lib/components/ActionListItem.svelte
@@ -12,7 +12,7 @@
     $props();
 
   let key = $derived(
-    (typeof id === "number" ? KEYMAP_CODES.get(id) ?? id : id) as
+    (typeof id === "number" ? ($KEYMAP_CODES.get(id) ?? id) : id) as
       | number
       | KeyInfo,
   );
diff --git a/src/lib/components/layout/ActionSelector.svelte b/src/lib/components/layout/ActionSelector.svelte
index f3693840..f1208ba8 100644
--- a/src/lib/components/layout/ActionSelector.svelte
+++ b/src/lib/components/layout/ActionSelector.svelte
@@ -3,12 +3,14 @@
     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";
 
   let {
     currentAction = undefined,
@@ -27,10 +29,13 @@
   });
 
   const index = new FlexSearch.Index({ tokenize: "full" });
-  createIndex();
 
-  async function createIndex() {
-    for (const [, action] of KEYMAP_CODES) {
+  $effect(() => {
+    createIndex($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 || ""} ${
@@ -42,7 +47,7 @@
 
   async function search() {
     results = (await index!.searchAsync(searchBox.value)) as number[];
-    exact = KEYMAP_IDS.get(searchBox.value)?.code;
+    exact = get(KEYMAP_IDS).get(searchBox.value)?.code;
     code = Number(searchBox.value);
   }
 
@@ -127,7 +132,7 @@
           bind:group={filter}
         /></label
       >
-      {#each KEYMAP_CATEGORIES as category}
+      {#each $KEYMAP_CATEGORIES as category}
         <label
           >{category.name}<input
             name="category"
@@ -167,7 +172,7 @@
       {#if filter !== undefined || results.length > 0}
         {@const resultValue =
           results.length === 0
-            ? Array.from(KEYMAP_CODES, ([it]) => it)
+            ? Array.from($KEYMAP_CODES, ([it]) => it)
             : results}
         {#each filter ? resultValue.filter( (it) => filter.has(it), ) : resultValue as id (id)}
           <li><ActionListItem {id} onclick={() => select(id)} /></li>
diff --git a/src/lib/components/layout/KeyText.svelte b/src/lib/components/layout/KeyText.svelte
index ece0ada3..e489a7b2 100644
--- a/src/lib/components/layout/KeyText.svelte
+++ b/src/lib/components/layout/KeyText.svelte
@@ -38,7 +38,7 @@
     isApplied: true,
   }}
   {@const { code, icon, id, display, title, keyCode, variant } =
-    KEYMAP_CODES.get(actionId) ?? { code: actionId }}
+    $KEYMAP_CODES.get(actionId) ?? { code: actionId }}
   {@const dynamicMapping = keyCode && $osLayout.get(keyCode)}
   {@const tooltip =
     (title ?? id ?? `0x${code.toString(16)}`) +
diff --git a/src/lib/meta/meta-storage.ts b/src/lib/meta/meta-storage.ts
new file mode 100644
index 00000000..f63b5360
--- /dev/null
+++ b/src/lib/meta/meta-storage.ts
@@ -0,0 +1,132 @@
+import type { RawVersionMeta, VersionMeta } from "./types/meta";
+import type { Listing } from "./types/listing";
+import type { KeymapCategory } from "./types/actions";
+import { browser } from "$app/environment";
+
+let lock: Promise<void> | undefined = undefined;
+
+export async function getMeta(
+  device: string,
+  version: string,
+  fetch: typeof window.fetch = window.fetch,
+): Promise<VersionMeta | undefined> {
+  while (lock) await lock;
+  let resolveLock!: () => void;
+  lock = new Promise((resolve) => (resolveLock = resolve));
+
+  try {
+    if (!browser) return fetchMeta(device, version, fetch);
+
+    const dbRequest = indexedDB.open("version-meta", 1);
+    const db = await new Promise<IDBDatabase>((resolve, reject) => {
+      dbRequest.onsuccess = () => resolve(dbRequest.result);
+      dbRequest.onerror = () => reject(dbRequest.error);
+      dbRequest.onupgradeneeded = () => {
+        const db = dbRequest.result;
+        db.createObjectStore("meta", { keyPath: ["device", "version"] });
+      };
+    });
+
+    try {
+      const readTransaction = db.transaction(["meta"], "readonly");
+      const store = readTransaction.objectStore("meta");
+      const itemRequest = store.get([device, version]);
+      const item = await new Promise<VersionMeta | undefined>((resolve) => {
+        itemRequest.onsuccess = () => resolve(itemRequest.result);
+        itemRequest.onerror = () => resolve(undefined);
+      });
+
+      if (item) return item;
+
+      const meta = await fetchMeta(device, version);
+      if (!meta) return undefined;
+
+      const putTransaction = db.transaction(["meta"], "readwrite");
+      const putStore = putTransaction.objectStore("meta");
+      const putRequest = putStore.put(meta);
+      await new Promise<void>((resolve, reject) => {
+        putRequest.onsuccess = () => resolve();
+        putRequest.onerror = () => reject(putRequest.error);
+      });
+      putTransaction.commit();
+
+      return meta;
+    } finally {
+      db.close();
+    }
+  } catch (error) {
+    console.error(error);
+  } finally {
+    resolveLock();
+    lock = undefined;
+  }
+  return undefined;
+}
+
+async function fetchMeta(
+  device: string,
+  version: string,
+  fetch: typeof window.fetch = window.fetch,
+): Promise<VersionMeta> {
+  const path = `${import.meta.env.VITE_FIRMWARE_URL}/${device}/${version}`;
+  const files: Listing[] = await fetch(`${path}/`).then((res) => res.json());
+  const meta: Partial<RawVersionMeta> | undefined = files.some(
+    (entry) => entry.type === "file" && entry.name === "meta.json",
+  )
+    ? await fetch(`${path}/meta.json`).then((res) => res.json())
+    : undefined;
+
+  return {
+    version: meta?.version ?? version,
+    device: meta?.target ?? device,
+    date: new Date(meta?.git_date ?? files[0]?.mtime ?? ""),
+    path,
+    commit: meta?.git_commit ?? undefined,
+    dirty: meta?.git_is_dirty ?? false,
+    public: meta?.public_build ?? !version.includes("+"),
+    developmentBuild: (meta?.development_mode ?? 0) === 1,
+    factoryDefaults: meta?.factory_defaults
+      ? {
+          layout: await fetch(`${path}/${meta.factory_defaults.layout}`).then(
+            (it) => it.json(),
+          ),
+          settings: await fetch(
+            `${path}/${meta.factory_defaults.settings}`,
+          ).then((it) => it.json()),
+          chords: Object.fromEntries(
+            await Promise.all(
+              Object.entries(meta.factory_defaults.chords).map(
+                async ([name, file]) => [
+                  name,
+                  await fetch(`${path}/${file}`).then((it) => it.json()),
+                ],
+              ),
+            ),
+          ),
+        }
+      : undefined,
+    actions: await (meta?.actions
+      ? fetch(`${path}/${meta.actions}`).then((it) => it.json())
+      : Promise.all<KeymapCategory[]>(
+          Object.values(import.meta.glob("$lib/assets/keymaps/*.yml")).map(
+            async (load) => load().then((it) => (it as any).default),
+          ),
+        )),
+    update: {
+      uf2:
+        meta?.update?.uf2 ??
+        files.find(
+          (entry) => entry.type === "file" && entry.name === "CURRENT.UF2",
+        )?.name ??
+        undefined,
+      ota:
+        meta?.update?.ota ??
+        files.find(
+          (entry) => entry.type === "file" && entry.name === "firmware.bin",
+        )?.name ??
+        undefined,
+      esptool: meta?.update?.esptool ?? undefined,
+    },
+    spiFlash: meta?.spi_flash ?? undefined,
+  };
+}
diff --git a/src/lib/meta/types/actions.ts b/src/lib/meta/types/actions.ts
new file mode 100644
index 00000000..b93c29d1
--- /dev/null
+++ b/src/lib/meta/types/actions.ts
@@ -0,0 +1,19 @@
+export interface KeymapCategory {
+  name: string;
+  description: string;
+  icon?: string;
+  display?: string;
+  type?: "unassigned";
+  actions: Record<number, Partial<ActionInfo>>;
+}
+
+export interface ActionInfo {
+  id: string;
+  title: string;
+  icon: string;
+  display: string;
+  description: string;
+  variant: "left" | "right";
+  variantOf: number;
+  keyCode: string;
+}
diff --git a/src/routes/(app)/ccos/listing.ts b/src/lib/meta/types/listing.ts
similarity index 100%
rename from src/routes/(app)/ccos/listing.ts
rename to src/lib/meta/types/listing.ts
diff --git a/src/lib/meta.ts b/src/lib/meta/types/meta.ts
similarity index 50%
rename from src/lib/meta.ts
rename to src/lib/meta/types/meta.ts
index 1dc77e82..d36ff17a 100644
--- a/src/lib/meta.ts
+++ b/src/lib/meta/types/meta.ts
@@ -1,4 +1,11 @@
-export interface VersionMeta {
+import type {
+  CharaChordFile,
+  CharaLayoutFile,
+  CharaSettingsFile,
+} from "$lib/share/chara-file";
+import type { KeymapCategory } from "./actions";
+
+export interface RawVersionMeta {
   version: string;
   target: string;
   git_commit: string;
@@ -6,6 +13,12 @@ export interface VersionMeta {
   git_date: string;
   public_build: boolean;
   development_mode: number;
+  actions: string;
+  factory_defaults: {
+    layout: string;
+    settings: string;
+    chords: Record<string, string>;
+  };
   update: {
     ota: string | null;
     uf2: string | null;
@@ -15,6 +28,29 @@ export interface VersionMeta {
   spi_flash: SPIFlashInfo | null;
 }
 
+export interface VersionMeta {
+  version: string;
+  device: string;
+  path: string;
+  date: Date;
+  public: boolean;
+  commit?: string;
+  dirty: boolean;
+  developmentBuild: boolean;
+  actions: KeymapCategory[];
+  factoryDefaults?: {
+    layout: CharaLayoutFile;
+    settings: CharaSettingsFile;
+    chords: Record<string, CharaChordFile>;
+  };
+  update: {
+    ota?: string;
+    uf2?: string;
+    esptool?: EspToolData;
+  };
+  spiFlash?: SPIFlashInfo;
+}
+
 export interface SPIFlashInfo {
   type: string;
   size: string;
diff --git a/src/lib/serial/connection.ts b/src/lib/serial/connection.ts
index f16cc428..f78aa320 100644
--- a/src/lib/serial/connection.ts
+++ b/src/lib/serial/connection.ts
@@ -6,6 +6,8 @@ import type { CharaLayout } from "$lib/serialization/layout";
 import { persistentWritable } from "$lib/storage";
 import { userPreferences } from "$lib/preferences";
 import settingInfo from "$lib/assets/settings.yml";
+import { getMeta } from "$lib/meta/meta-storage";
+import type { VersionMeta } from "$lib/meta/types/meta";
 
 export const serialPort = writable<CharaDevice | undefined>();
 
@@ -47,6 +49,8 @@ export const syncStatus: Writable<
   "done" | "error" | "downloading" | "uploading"
 > = writable("done");
 
+export const deviceMeta = writable<VersionMeta | undefined>(undefined);
+
 export interface ProgressInfo {
   max: number;
   current: number;
@@ -65,6 +69,12 @@ export async function initSerial(manual = false, withSync = true) {
 export async function sync() {
   const device = get(serialPort);
   if (!device) return;
+  getMeta(
+    `${device.device}_${device.chipset}`.toLowerCase(),
+    device.version.toString(),
+  ).then((meta) => {
+    deviceMeta.set(meta);
+  });
   const chordCount = await device.getChordCount();
   syncStatus.set("downloading");
 
diff --git a/src/lib/serial/keymap-codes.ts b/src/lib/serial/keymap-codes.ts
index b9912f0b..49deb0d2 100644
--- a/src/lib/serial/keymap-codes.ts
+++ b/src/lib/serial/keymap-codes.ts
@@ -1,38 +1,64 @@
 import type { ActionInfo, KeymapCategory } from "$lib/assets/keymaps/keymap";
+import { derived, type Readable } from "svelte/store";
+import { deviceMeta } from "./connection";
 
 export interface KeyInfo extends Partial<ActionInfo> {
   code: number;
   category?: KeymapCategory;
 }
 
-export const KEYMAP_CATEGORIES = (await Promise.all(
+const fallbackActions = await Promise.all<KeymapCategory>(
   Object.values(import.meta.glob("$lib/assets/keymaps/*.yml")).map(
     async (load) => load().then((it) => (it as any).default),
   ),
-)) as KeymapCategory[];
-
-export const KEYMAP_CODES = new Map<number, KeyInfo>(
-  KEYMAP_CATEGORIES.flatMap((category) =>
-    Object.entries(category.actions).map(([code, action]) => [
-      Number(code),
-      { ...action, code: Number(code), category },
-    ]),
-  ),
 );
 
-export const KEYMAP_KEYCODES = new Map<string, number>(
-  KEYMAP_CATEGORIES.flatMap((category) =>
-    Object.entries(category.actions).map(
-      ([code, action]) => [action.keyCode!, Number(code)] as const,
+export let KEYMAP_CATEGORIES: Readable<KeymapCategory[]> = derived(
+  deviceMeta,
+  (deviceMeta) => deviceMeta?.actions ?? fallbackActions,
+);
+
+export const KEYMAP_CODES: Readable<Map<number, KeyInfo>> = derived(
+  KEYMAP_CATEGORIES,
+  (categories) =>
+    new Map<number, KeyInfo>(
+      categories.flatMap((category) =>
+        Object.entries(category.actions).map(([code, action]) => [
+          Number(code),
+          { ...action, code: Number(code), category },
+        ]),
+      ),
     ),
-  ).filter(([keyCode]) => keyCode !== undefined),
 );
 
-export const KEYMAP_IDS = new Map<string, KeyInfo>(
-  KEYMAP_CATEGORIES.flatMap((category) =>
-    Object.entries(category.actions).map(
-      ([code, action]) =>
-        [action.id!, { ...action, code: Number(code), category }] as const,
+export const KEYMAP_KEYCODES: Readable<Map<string, number>> = derived(
+  KEYMAP_CATEGORIES,
+  (categories) =>
+    new Map<string, number>(
+      categories
+        .flatMap((category) =>
+          Object.entries(category.actions).map(
+            ([code, action]) => [action.keyCode!, Number(code)] as const,
+          ),
+        )
+        .filter(([keyCode]) => keyCode !== undefined),
+    ),
+);
+
+export const KEYMAP_IDS: Readable<Map<string, KeyInfo>> = derived(
+  KEYMAP_CATEGORIES,
+  (categories) =>
+    new Map<string, KeyInfo>(
+      categories
+        .flatMap((category) =>
+          Object.entries(category.actions).map(
+            ([code, action]) =>
+              [
+                action.id!,
+                { ...action, code: Number(code), category },
+              ] as const,
+          ),
+        )
+        .filter(([id]) => id !== undefined),
     ),
-  ).filter(([id]) => id !== undefined),
 );
diff --git a/src/lib/undo-redo.ts b/src/lib/undo-redo.ts
index f0a51f48..2ecdaf73 100644
--- a/src/lib/undo-redo.ts
+++ b/src/lib/undo-redo.ts
@@ -107,57 +107,61 @@ export type ChordInfo = Chord &
     id: number[];
     deleted: boolean;
   };
-export const chords = derived([overlay, deviceChords], ([overlay, chords]) => {
-  const newChords = new Set(overlay.chords.keys());
+export const chords = derived(
+  [overlay, deviceChords, KEYMAP_CODES],
+  ([overlay, chords, codes]) => {
+    const newChords = new Set(overlay.chords.keys());
 
-  const changedChords = chords.map<ChordInfo>((chord) => {
-    const id = JSON.stringify(chord.actions);
-    if (overlay.chords.has(id)) {
-      newChords.delete(id);
-      const changedChord = overlay.chords.get(id)!;
-      return {
-        id: chord.actions,
-        // use the old phrase for stable editing
-        sortBy: chord.phrase.map((it) => KEYMAP_CODES.get(it)?.id ?? it).join(),
-        actions: changedChord.actions,
-        phrase: changedChord.phrase,
-        actionsChanged: id !== JSON.stringify(changedChord.actions),
-        phraseChanged:
-          JSON.stringify(chord.phrase) !== JSON.stringify(changedChord.phrase),
-        isApplied: false,
-        deleted: changedChord.deleted,
-      };
-    } else {
-      return {
-        id: chord.actions,
-        sortBy: chord.phrase.map((it) => KEYMAP_CODES.get(it)?.id ?? it).join(),
-        actions: chord.actions,
-        phrase: chord.phrase,
-        phraseChanged: false,
-        actionsChanged: false,
-        isApplied: true,
-        deleted: false,
-      };
-    }
-  });
-  for (const id of newChords) {
-    const chord = overlay.chords.get(id)!;
-    changedChords.push({
-      sortBy: "",
-      isApplied: false,
-      actionsChanged: true,
-      phraseChanged: false,
-      deleted: chord.deleted,
-      id: JSON.parse(id),
-      phrase: chord.phrase,
-      actions: chord.actions,
+    const changedChords = chords.map<ChordInfo>((chord) => {
+      const id = JSON.stringify(chord.actions);
+      if (overlay.chords.has(id)) {
+        newChords.delete(id);
+        const changedChord = overlay.chords.get(id)!;
+        return {
+          id: chord.actions,
+          // use the old phrase for stable editing
+          sortBy: chord.phrase.map((it) => codes.get(it)?.id ?? it).join(),
+          actions: changedChord.actions,
+          phrase: changedChord.phrase,
+          actionsChanged: id !== JSON.stringify(changedChord.actions),
+          phraseChanged:
+            JSON.stringify(chord.phrase) !==
+            JSON.stringify(changedChord.phrase),
+          isApplied: false,
+          deleted: changedChord.deleted,
+        };
+      } else {
+        return {
+          id: chord.actions,
+          sortBy: chord.phrase.map((it) => codes.get(it)?.id ?? it).join(),
+          actions: chord.actions,
+          phrase: chord.phrase,
+          phraseChanged: false,
+          actionsChanged: false,
+          isApplied: true,
+          deleted: false,
+        };
+      }
     });
-  }
+    for (const id of newChords) {
+      const chord = overlay.chords.get(id)!;
+      changedChords.push({
+        sortBy: "",
+        isApplied: false,
+        actionsChanged: true,
+        phraseChanged: false,
+        deleted: chord.deleted,
+        id: JSON.parse(id),
+        phrase: chord.phrase,
+        actions: chord.actions,
+      });
+    }
 
-  return changedChords.sort(({ sortBy: a }, { sortBy: b }) =>
-    a.localeCompare(b),
-  );
-});
+    return changedChords.sort(({ sortBy: a }, { sortBy: b }) =>
+      a.localeCompare(b),
+    );
+  },
+);
 
 export const chordHashes = derived(
   chords,
diff --git a/src/routes/(app)/api/firmware/+page.json b/src/routes/(app)/api/firmware/+page.json
deleted file mode 100644
index b7ec6ee8..00000000
--- a/src/routes/(app)/api/firmware/+page.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "CHARACHORDER ONE M0": {
-    "latest": "1.1.3",
-    "next": null
-  }
-}
diff --git a/src/routes/(app)/ccos/+page.ts b/src/routes/(app)/ccos/+page.ts
index 66aa787c..6a4112e1 100644
--- a/src/routes/(app)/ccos/+page.ts
+++ b/src/routes/(app)/ccos/+page.ts
@@ -1,8 +1,8 @@
 import type { PageLoad } from "./$types";
-import type { DirectoryListing } from "./listing";
+import type { DirectoryListing } from "$lib/meta/types/listing";
 
 export const load = (async ({ fetch }) => {
-  const result = await fetch(import.meta.env.VITE_FIRMWARE_URL);
+  const result = await fetch(`${import.meta.env.VITE_FIRMWARE_URL}/`);
   const data = await result.json();
 
   return { devices: data as DirectoryListing[] };
diff --git a/src/routes/(app)/ccos/[device]/+page.ts b/src/routes/(app)/ccos/[device]/+page.ts
index 0c1c1575..bff4bad8 100644
--- a/src/routes/(app)/ccos/[device]/+page.ts
+++ b/src/routes/(app)/ccos/[device]/+page.ts
@@ -1,5 +1,5 @@
 import type { PageLoad } from "./$types";
-import type { DirectoryListing } from "../listing";
+import type { DirectoryListing } from "$lib/meta/types/listing";
 
 export const load = (async ({ fetch, params }) => {
   const result = await fetch(
diff --git a/src/routes/(app)/ccos/[device]/[version]/+page.svelte b/src/routes/(app)/ccos/[device]/[version]/+page.svelte
index f5bca3f5..94ce42b9 100644
--- a/src/routes/(app)/ccos/[device]/[version]/+page.svelte
+++ b/src/routes/(app)/ccos/[device]/[version]/+page.svelte
@@ -27,7 +27,7 @@
     $serialPort = undefined;
     try {
       const file = await fetch(
-        `${data.meta.path}/${data.meta.update.ota?.name}`,
+        `${data.meta.path}/${data.meta.update.ota}`,
       ).then((it) => it.blob());
 
       await port.updateFirmware(file);
@@ -46,7 +46,7 @@
       : undefined,
   );
   let isCorrectDevice = $derived(
-    currentDevice ? currentDevice === data.meta.target : undefined,
+    currentDevice ? currentDevice === data.meta.device : undefined,
   );
 
   /**
@@ -84,11 +84,11 @@
 
   async function getFileSystem() {
     if (!data.meta.update.uf2) return;
-    const uf2Promise = fetch(
-      `${data.meta.path}/${data.meta.update.uf2.name}`,
-    ).then((it) => it.blob());
+    const uf2Promise = fetch(`${data.meta.path}/${data.meta.update.uf2}`).then(
+      (it) => it.blob(),
+    );
     const handle = await window.showSaveFilePicker({
-      id: `${data.meta.target}-update`,
+      id: `${data.meta.device}-update`,
       suggestedName: "CURRENT.UF2",
       excludeAcceptAllOption: true,
       types: [
@@ -172,7 +172,7 @@
     const port = await navigator.serial.requestPort();
     try {
       console.log(data.meta);
-      const spiFlash = data.meta.spi_flash!;
+      const spiFlash = data.meta.spiFlash!;
       espLoader = await connectEsp(port);
 
       /*espLoader.flashSpiAttach(
@@ -189,7 +189,7 @@
 </script>
 
 <div class="container">
-  {#if data.meta.update.ota && !data.meta.target.endsWith("m0")}
+  {#if data.meta.update.ota && !data.meta.device.endsWith("m0")}
     {@const buttonError = error || (!success && isCorrectDevice === false)}
     <section>
       <button
diff --git a/src/routes/(app)/ccos/[device]/[version]/+page.ts b/src/routes/(app)/ccos/[device]/[version]/+page.ts
index 3497194f..566192a0 100644
--- a/src/routes/(app)/ccos/[device]/[version]/+page.ts
+++ b/src/routes/(app)/ccos/[device]/[version]/+page.ts
@@ -1,50 +1,14 @@
 import type { PageLoad } from "./$types";
-import type { FileListing, Listing } from "../../listing";
-import type { VersionMeta } from "$lib/meta";
+import { getMeta } from "$lib/meta/meta-storage";
+import { error } from "@sveltejs/kit";
 
 export const load = (async ({ fetch, params }) => {
-  const result = await fetch(
-    `${import.meta.env.VITE_FIRMWARE_URL}/${params.device}/${params.version}/`,
-  );
-  const data: Listing[] = await result.json();
-  const meta: VersionMeta | undefined = data.some(
-    (entry) => entry.type === "file" && entry.name === "meta.json",
-  )
-    ? await fetch(
-        `${import.meta.env.VITE_FIRMWARE_URL}/${params.device}/${params.version}/meta.json`,
-      ).then((res) => res.json())
-    : undefined;
-
-  return {
-    meta: {
-      version: meta?.version ?? params.version,
-      target: meta?.target ?? params.device,
-      path: `${import.meta.env.VITE_FIRMWARE_URL}${params.device}/${params.version}`,
-      git_commit: meta?.git_commit ?? "",
-      git_is_dirty: meta?.git_is_dirty ?? false,
-      git_date: meta?.git_date ?? data[0]?.mtime ?? "",
-      public_build: meta?.public_build ?? !params.version.includes("+"),
-      development_mode: meta?.development_mode ?? 0,
-      update: {
-        uf2:
-          (data.find(
-            (entry) =>
-              entry.type === "file" &&
-              entry.name === (meta?.update?.uf2 ?? "CURRENT.UF2"),
-          ) as FileListing) ?? undefined,
-        ota:
-          data.find(
-            (entry) =>
-              entry.type === "file" &&
-              entry.name === (meta?.update?.ota ?? "firmware.bin"),
-          ) ?? undefined,
-        esptool: meta?.update?.esptool ?? undefined,
-      },
-      files: data.filter(
-        (entry) =>
-          entry.type === "file" && (!meta?.files || entry.name in meta.files),
-      ) as FileListing[],
-      spi_flash: meta?.spi_flash ?? undefined,
-    },
-  };
+  const meta = await getMeta(params.device, params.version, fetch);
+  if (meta === undefined) {
+    error(
+      404,
+      `The version ${params.version} for device ${params.device} does not exist.`,
+    );
+  }
+  return { meta };
 }) satisfies PageLoad;
diff --git a/src/routes/(app)/chat-rx/+page.svelte b/src/routes/(app)/chat-rx/+page.svelte
index 36834927..6496c957 100644
--- a/src/routes/(app)/chat-rx/+page.svelte
+++ b/src/routes/(app)/chat-rx/+page.svelte
@@ -1,5 +1,5 @@
 <script lang="ts">
-  import { initMatrixClient, isLoggedIn, matrix } from "$lib/chat/chat";
+  import { initMatrixClient, isLoggedIn, matrix } from "$lib/chat/chat-rx";
   import { flip } from "svelte/animate";
   import { slide } from "svelte/transition";
   import Login from "./Login.svelte";
diff --git a/src/routes/(app)/config/chords/+page.svelte b/src/routes/(app)/config/chords/+page.svelte
index 7fb5198a..e8b01d51 100644
--- a/src/routes/(app)/config/chords/+page.svelte
+++ b/src/routes/(app)/config/chords/+page.svelte
@@ -1,5 +1,5 @@
 <script lang="ts">
-  import { KEYMAP_CODES } from "$lib/serial/keymap-codes";
+  import { KEYMAP_CODES, type KeyInfo } from "$lib/serial/keymap-codes";
   import FlexSearch from "flexsearch";
   import LL from "$i18n/i18n-svelte";
   import { action } from "$lib/title";
@@ -40,16 +40,21 @@
   $effect(() => {
     abortIndexing?.();
     progress = 0;
-    buildIndex($chords, $osLayout).then(searchIndex.set);
+    buildIndex($chords, $osLayout, $KEYMAP_CODES).then(searchIndex.set);
   });
 
-  function encodeChord(chord: ChordInfo, osLayout: Map<string, string>, onlyPhrase: boolean = false) {
+  function encodeChord(
+    chord: ChordInfo,
+    osLayout: Map<string, string>,
+    codes: Map<number, KeyInfo>,
+    onlyPhrase: boolean = false,
+  ) {
     const plainPhrase: string[] = [""];
     const extraActions: string[] = [];
     const extraCodes: string[] = [];
 
     for (const actionCode of chord.phrase ?? []) {
-      const action = KEYMAP_CODES.get(actionCode);
+      const action = codes.get(actionCode);
       if (!action) {
         extraCodes.push(`0x${actionCode.toString(16)}`);
         continue;
@@ -96,7 +101,7 @@
     const input = chord.actions
       .slice(chord.actions.lastIndexOf(0) + 1)
       .map((it) => {
-        const info = KEYMAP_CODES.get(it);
+        const info = codes.get(it);
         if (!info) return `0x${it.toString(16)}`;
         const osCode = info.keyCode && osLayout.get(info.keyCode);
         const result = osCode?.length === 1 ? osCode : info.id;
@@ -118,6 +123,7 @@
   async function buildIndex(
     chords: ChordInfo[],
     osLayout: Map<string, string>,
+    codes: Map<number, KeyInfo>,
   ): Promise<FlexSearch.Index> {
     if (chords.length === 0 || !browser) return index;
     index = new FlexSearch.Index({
@@ -148,7 +154,7 @@
       progress = i;
 
       if ("phrase" in chord) {
-        await index.addAsync(i, encodeChord(chord, osLayout));
+        await index.addAsync(i, encodeChord(chord, osLayout, codes));
       }
     }
     return index;
@@ -186,7 +192,9 @@
   function downloadVocabulary() {
     const vocabulary = new Set(
       $chords.map((it) =>
-        "phrase" in it ? encodeChord(it, $osLayout, true).trim() : "",
+        "phrase" in it
+          ? encodeChord(it, $osLayout, $KEYMAP_CODES, true).trim()
+          : "",
       ),
     );
     vocabulary.delete("");
diff --git a/vite.config.ts b/vite.config.ts
index cd9add04..0b2e6a11 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -23,7 +23,7 @@ process.env["VITE_LEARN_URL"] = "https://www.iq-eq.io/";
 process.env["VITE_LATEST_FIRMWARE"] = "1.1.4";
 process.env["VITE_STORE_URL"] = "https://www.charachorder.com/";
 process.env["VITE_MATRIX_URL"] = "https://charachorder.io/";
-process.env["VITE_FIRMWARE_URL"] = "https://charachorder.io/firmware/";
+process.env["VITE_FIRMWARE_URL"] = "https://charachorder.io/firmware";
 
 export default defineConfig({
   build: {