diff --git a/packages/shell/src/index.ts b/packages/shell/src/index.ts
index ec85ce6..9871876 100644
--- a/packages/shell/src/index.ts
+++ b/packages/shell/src/index.ts
@@ -8,6 +8,7 @@ import { getConfig } from './services/config'
 import type { ChronocatLogCurrentConfig } from './services/config/configEntity'
 import { emitter } from './services/emitter'
 import { l } from './services/logger'
+import { mime } from './services/mime'
 import { getSelfProfile, setSelfProfile } from './services/selfProfile'
 import { uix } from './services/uix'
 import { validate } from './services/validate'
@@ -50,6 +51,7 @@ export const chronocat = () => {
       getSelfProfile,
       h,
       l,
+      mime,
       platform: PLATFORM,
       sleep,
       timeout,
diff --git a/packages/shell/src/services/mime.ts b/packages/shell/src/services/mime.ts
new file mode 100644
index 0000000..4fcd625
--- /dev/null
+++ b/packages/shell/src/services/mime.ts
@@ -0,0 +1,7 @@
+// Should be 'mime/lite' but there's hoist pollution
+import { Mime } from 'mime/dist/src/index_lite'
+import mimeStandard from 'mime/types/standard.js'
+
+export const mime = new Mime().define(mimeStandard).define({
+  'audio/silk': ['slk', 'silk', 'ntsilk'],
+})
diff --git a/packages/shell/src/types.ts b/packages/shell/src/types.ts
index 117279e..ef8c76d 100644
--- a/packages/shell/src/types.ts
+++ b/packages/shell/src/types.ts
@@ -47,6 +47,7 @@ import type {
   ChronocatSatoriServerConfig,
 } from './services/config/configEntity'
 import type { l } from './services/logger'
+import type { mime } from './services/mime'
 import type { getSelfProfile } from './services/selfProfile'
 import type { uix } from './services/uix'
 import type { validate } from './services/validate'
@@ -65,6 +66,7 @@ export interface ChronocatContext {
     getSelfProfile: typeof getSelfProfile
     h: typeof h
     l: typeof l
+    mime: typeof mime
     platform: typeof PLATFORM
     sleep: typeof sleep
     timeout: typeof timeout