diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..eade8b4
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,18 @@
+name: CI
+
+on:
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Validate Commands JSON structure
+      run: node ./internal/validate-commands-json.js
+    
+    - name: Validate Commands
+      run: node ./internal/validate-commands.js
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..554a8f3
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..71084fe
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# GitHub Minesweeper
+
+Gain hands-on experience with a professional Git workflow used in many real-world teams with the help of a bot teammate. Find more information at [Profy.dev](https://profy.dev/project/github-minesweeper).
diff --git a/commands.json b/commands.json
new file mode 100644
index 0000000..ac225f0
--- /dev/null
+++ b/commands.json
@@ -0,0 +1,3 @@
+{
+  "commands": []
+}
\ No newline at end of file
diff --git a/internal/game b/internal/game
new file mode 100644
index 0000000..b273653
--- /dev/null
+++ b/internal/game
@@ -0,0 +1 @@
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
diff --git a/internal/handle-error.js b/internal/handle-error.js
new file mode 100644
index 0000000..24357e3
--- /dev/null
+++ b/internal/handle-error.js
@@ -0,0 +1,6 @@
+function handleError(message) {
+  console.error(`\n\n${message}\n\n`);
+  process.exit(1);
+};
+
+module.exports = handleError;
\ No newline at end of file
diff --git a/internal/validate-commands-json.js b/internal/validate-commands-json.js
new file mode 100644
index 0000000..bba0a23
--- /dev/null
+++ b/internal/validate-commands-json.js
@@ -0,0 +1,26 @@
+const fs = require('fs');
+const handleError = require('./handle-error');
+
+const commandsFile = fs.readFileSync('./commands.json');
+let commandsJson;
+try {
+  commandsJson = JSON.parse(commandsFile);
+} catch (e) {
+  if (e instanceof SyntaxError) {
+    handleError(`The commands.json file contains a syntax error: ${e.message}`);
+    return;
+  }
+  throw e;
+}
+
+if (!commandsJson.commands || !Array.isArray(commandsJson.commands)) {
+  handleError('The structure of the commands object is broken.');
+  return;
+}
+
+commandsJson.commands.forEach(command => {
+  if (typeof command !== 'string') {
+    handleError('Each item in the commands array must be a string');
+    return;
+  }
+})
\ No newline at end of file
diff --git a/internal/validate-commands.js b/internal/validate-commands.js
new file mode 100644
index 0000000..1c3143e
--- /dev/null
+++ b/internal/validate-commands.js
@@ -0,0 +1,44 @@
+const fs = require('fs');
+const handleError = require('./handle-error');
+
+const VALID_COMMANDS = {
+  CLEAR: 'CLEAR', 
+  FLAG: 'FLAG', 
+  UNFLAG: 'UNFLAG', 
+  END: 'END'
+};
+const NUM_ROWS = 8;
+const NUM_COLS = 8;
+
+const commandsFile = fs.readFileSync('./commands.json');
+const { commands } = JSON.parse(commandsFile)
+
+commands.forEach(command => {
+  const [action, cellId] = command.toUpperCase().split(/\s+/g);
+  if (!Object.values(VALID_COMMANDS).includes(action)) {
+    handleError(`Invalid command "${command}"`);
+    return;
+  }
+
+  if (action === VALID_COMMANDS.END) {
+    return;
+  }
+
+  const posX = Number(cellId.charCodeAt(0) - "A".charCodeAt(0));
+  const posY = Number.parseInt(cellId.charAt(1), 10) - 1;
+
+  if (isNaN(posY)) {
+    handleError(`${command}: The second character ${cellId.charAt(1)} in ${cellId} has to be a number`);
+    return;
+  }
+
+  if (
+    posX < 0 ||
+    posX >= NUM_COLS ||
+    posY < 0 ||
+    posY >= NUM_ROWS
+  ) {
+    handleError(`${command}: Field ${cellId} does not exist.`);
+    return;
+  }
+})
\ No newline at end of file