diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..0a34fb4
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Johnny Huynh
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/README.md b/README.md
index 03f4832..60939b1 100644
--- a/README.md
+++ b/README.md
@@ -102,4 +102,4 @@ uv run --with fonttools python scripts/build-screenshot.py   # docs/assets/scree
 
 ## License
 
-No license chosen yet. Personal project, shared in the open.
\ No newline at end of file
+[MIT](./LICENSE) — see the file for full text. Personal project, shared in the open.
\ No newline at end of file
diff --git a/package.json b/package.json
index a71d6df..ba988ef 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,7 @@
   "name": "pidex",
   "version": "0.0.1",
   "private": true,
+  "license": "MIT",
   "repository": "https://github.com/echohello-dev/pidex",
   "main": "dist/main/index.js",
   "scripts": {
diff --git a/src/renderer/api.ts b/src/renderer/api.ts
index 89e1e50..ba6faf8 100644
--- a/src/renderer/api.ts
+++ b/src/renderer/api.ts
@@ -43,7 +43,7 @@ type SessionEventPayload = {
   event: Record<string, unknown> & { type: string };
 };
 
-type OpenPiApi = {
+type PidexApi = {
   platform: string;
   versions: { electron: string; node: string };
   workspaces: () => Promise<WorkspaceInfo[]>;
@@ -60,8 +60,8 @@ type OpenPiApi = {
 
 declare global {
   interface Window {
-    pidex: OpenPiApi;
+    pidex: PidexApi;
   }
 }
 
-export type { WorkspaceInfo, SessionInfo, SessionState, OpenResult, SessionEventPayload, OpenPiApi, SlashCommand };
+export type { WorkspaceInfo, SessionInfo, SessionState, OpenResult, SessionEventPayload, PidexApi, SlashCommand };