Add Knip unused-code checks

README.md

@@ -48,6 +48,7 @@ sent to the browser.
 ```bash
 nix develop -c pnpm dev
 nix develop -c pnpm dev:tailscale
+nix develop -c pnpm knip
 nix develop -c pnpm test
 nix develop -c pnpm test:e2e
 nix develop -c pnpm test:live

flake.nix

@@ -17,7 +17,7 @@
             inherit (finalAttrs) pname version src;
             pnpm = pkgs.pnpm_11;
             fetcherVersion = 4;
-            hash = "sha256-Dk0GkHhvVuls8CkBxYmKV4xYCaZ4vR1UDYCgQmHMgaM=";
+            hash = "sha256-TF1cCC86a24Cukks7+BbeM2fvU0SkHtSm6RUIF55RuY=";
           };
 
           nativeBuildInputs = with pkgs; [

knip.ts

@@ -0,0 +1,10 @@
+import type { KnipConfig } from 'knip'
+
+export default {
+  entry: [
+    'playwright.config.ts',
+    'tests/e2e/**/*.spec.ts',
+    'tests/e2e/mock-relay.mjs',
+  ],
+  playwright: false,
+} satisfies KnipConfig

package.json

@@ -18,6 +18,7 @@
     "start": "HOST=127.0.0.1 node .output/server/index.mjs",
     "typecheck": "tsc --noEmit",
     "lint": "biome check .",
+    "knip": "knip",
     "format": "biome check --write .",
     "test": "vitest run",
     "test:watch": "vitest",
@@ -38,7 +39,6 @@
   "devDependencies": {
     "@biomejs/biome": "2.5.3",
     "@playwright/test": "1.61.1",
-    "@tanstack/router-cli": "1.167.18",
     "@testing-library/dom": "10.4.1",
     "@testing-library/jest-dom": "6.9.1",
     "@testing-library/react": "16.3.2",
@@ -47,6 +47,7 @@
     "@types/react-dom": "19.2.3",
     "@vitejs/plugin-react": "6.0.3",
     "jsdom": "29.1.1",
+    "knip": "6.27.0",
     "typescript": "7.0.2",
     "vite": "8.1.4",
     "vitest": "4.1.10"

src/features/posts/types.ts

@@ -14,7 +14,7 @@ export type ThreadPage = PostPage & {
   conversationId: string
 }
 
-export type LoadErrorCode =
+type LoadErrorCode =
   | 'invalid-input'
   | 'post-not-found'
   | 'post-unavailable'