test: remove eslint, use biome.

.github/dependabot.yml

@@ -7,11 +7,6 @@ updates:
     labels:
       - "npm"
       - "dependencies"
-    groups:
-      linter:
-        patterns:
-        - "eslint*"
-        - "@typescript-eslint*"
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:

.github/workflows/eslint.yml → .github/workflows/lint.yml

@@ -1,4 +1,4 @@
-name: Linting with ESLint
+name: Build and Lint
 
 on:
   push:
@@ -11,14 +11,12 @@ jobs:
     timeout-minutes: 5
     strategy:
       matrix:
-        node-version: [18.x, 20.x]
+        node-version: [18.x, 20.x, 22.x]
     steps:
     - uses: actions/checkout@v4
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v4
       with:
         node-version: ${{ matrix.node-version }}
-    - name: Install modules
-      run: npm install
-    - name: Run ESLint
-      run: npm run lint
+    - run: npm install
+    - run: npm test

README.md

@@ -59,12 +59,12 @@ npm install
 npm start
 ```
 
-### Linting
+### Testing
 
-Run ESLint for code formatting and linting:
+Run the TypeScript compilation, code formatting and linting:
 
 ```zsh
-npm run lint
+npm test
 ```
 
 ## Using Steps in Workflow Builder

app.ts

@@ -1,4 +1,4 @@
-import { App, BlockAction, LogLevel } from '@slack/bolt';
+import { App, type BlockAction, LogLevel } from '@slack/bolt';
 import { config } from 'dotenv';
 
 config();
@@ -51,15 +51,19 @@ app.action<BlockAction>('sample_button', async ({ body, client, complete, fail }
     // Functions should be marked as successfully completed using `complete` or
     // as having failed using `fail`, else they'll remain in an 'In progress' state.
     // Learn more at https://api.slack.com/automation/interactive-messages
+    // biome-ignore lint/style/noNonNullAssertion: we know this button comes from a function, so `fail` is available.
     await complete!({ outputs: { user_id: user.id } });
 
     await client.chat.update({
+      // biome-ignore lint/style/noNonNullAssertion: we know this button was posted to a channel, so `channel` is available.
       channel: channel!.id,
+      // biome-ignore lint/style/noNonNullAssertion: we know this button was posted to a channel, so `message` is available.
       ts: message!.ts,
       text: 'Function completed successfully!',
     });
   } catch (error) {
     console.error(error);
+    // biome-ignore lint/style/noNonNullAssertion: we know this button comes from a function, so `fail` is available.
     fail!({ error: `Failed to handle a function request: ${error}` });
   }
 });

biome.json

@@ -0,0 +1,32 @@
+{
+  "$schema": "https://biomejs.dev/schemas/1.8.3/schema.json",
+  "formatter": {
+    "enabled": true,
+    "formatWithErrors": false,
+    "ignore": [],
+    "attributePosition": "auto",
+    "indentStyle": "space",
+    "indentWidth": 2,
+    "lineWidth": 120,
+    "lineEnding": "lf"
+  },
+  "javascript": {
+    "formatter": {
+      "quoteStyle": "single"
+    }
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true
+    }
+  },
+  "organizeImports": {
+    "enabled": true
+  },
+  "vcs": {
+    "enabled": true,
+    "clientKind": "git",
+    "useIgnoreFile": true
+  }
+}