diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
new file mode 100644
index 0000000..3c1b731
--- /dev/null
+++ b/.devcontainer/devcontainer.json
@@ -0,0 +1,15 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/universal
+{
+	"customizations": {
+		"vscode": {
+			"extensions": [
+				"denoland.vscode-deno",
+				"GitHub.vscode-github-actions"
+			]
+		}
+	},
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	"postCreateCommand": ".devcontainer/postCreate.sh"
+}
diff --git a/.devcontainer/postCreate.sh b/.devcontainer/postCreate.sh
new file mode 100755
index 0000000..dcfb39c
--- /dev/null
+++ b/.devcontainer/postCreate.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+curl -fsSL https://deno.land/install.sh | CI=devcontainer sh
+echo 'export PATH=$PATH:~/.deno/bin' >> ~/.bashrc
+echo 'export PATH=$PATH:~/.deno/bin' >> ~/.zshrc
+echo 'export DENO_INSTALL=~/.deno' >> ~/.bashrc
+echo 'export DENO_INSTALL=~/.deno' >> ~/.zshrc
\ No newline at end of file
diff --git a/.github/scripts/parse.ts b/.github/scripts/parse.ts
new file mode 100644
index 0000000..837000d
--- /dev/null
+++ b/.github/scripts/parse.ts
@@ -0,0 +1,9 @@
+import { CoreMods } from "./types/core-mods.ts";
+
+// Read data
+const jsonText = await Deno.readTextFile("core_mods.json");
+
+const data = JSON.parse(jsonText) as CoreMods;
+const stringifiedData = JSON.stringify(data, null, "  ");
+
+console.log(stringifiedData);
\ No newline at end of file
diff --git a/.github/scripts/types/core-mods.ts b/.github/scripts/types/core-mods.ts
new file mode 100644
index 0000000..15e18f6
--- /dev/null
+++ b/.github/scripts/types/core-mods.ts
@@ -0,0 +1,11 @@
+export interface CoreMods {
+    lastUpdated: string;
+    mods:        Mod[];
+}
+
+export interface Mod {
+    id:           string;
+    version:      string;
+    downloadLink: string;
+    filename?:    string;
+}
\ No newline at end of file
diff --git a/.github/scripts/validate-schema.ts b/.github/scripts/validate-schema.ts
new file mode 100644
index 0000000..535f9b9
--- /dev/null
+++ b/.github/scripts/validate-schema.ts
@@ -0,0 +1,24 @@
+import Ajv from "https://esm.sh/ajv@8";
+import addFormats from "https://esm.sh/ajv-formats";
+
+// Read schema and data
+const schemaText = await Deno.readTextFile("core_mods.schema.json");
+const jsonText = await Deno.readTextFile("core_mods.json");
+
+const schema = JSON.parse(schemaText);
+const data = JSON.parse(jsonText);
+
+// Create AJV instance with formats (for date-time, uri, etc.)
+const ajv = new Ajv({ allErrors: true, strict: false });
+addFormats(ajv);
+
+const validate = ajv.compile(schema);
+const valid = validate(data);
+
+if (valid) {
+  console.log("%ccore_mods.json is valid.", "color: green");
+} else {
+  console.error("%cValidation errors:", "color: red");
+  console.error(validate.errors);
+  Deno.exit(1);
+}
\ No newline at end of file
diff --git a/.github/scripts/validate-timestamps.ts b/.github/scripts/validate-timestamps.ts
new file mode 100644
index 0000000..7c34c15
--- /dev/null
+++ b/.github/scripts/validate-timestamps.ts
@@ -0,0 +1,34 @@
+// Read and parse the JSON file asynchronously using Deno's API.
+const fileText = await Deno.readTextFile("core_mods.json");
+const parsedData = JSON.parse(fileText);
+
+const GREEN = "\x1b[32m";
+const RED = "\x1b[31m";
+const RESET = "\x1b[0m";
+
+function isStrictISO8601(value: string): boolean {
+  const ISO_8601_FULL = /^\d{4}-\d\d-\d\dT\d\d:\d\d:\d\d(?:\.\d+)?(?:[+-]\d\d:\d\d|Z)?$/i;
+  return ISO_8601_FULL.test(value);
+}
+
+let errored = false;
+
+for (const [version, data] of Object.entries(parsedData)) {
+  if (version === "$schema") {
+    continue;
+  }
+  
+  const valid = isStrictISO8601(data.lastUpdated);
+  console.log(
+    `${version}: ${data.lastUpdated} is ${
+      valid ? `${GREEN}VALID${RESET}` : `${RED}INVALID${RESET}`
+    }`
+  );
+  if (!valid) {
+    errored = true;
+  }
+}
+
+if (errored) {
+  Deno.exit(1);
+}
diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
new file mode 100644
index 0000000..9fe89b0
--- /dev/null
+++ b/.github/workflows/validate.yml
@@ -0,0 +1,57 @@
+name: Validate core_mods.json
+
+on:
+  pull_request:
+  push:
+    branches: 'main'
+
+jobs:
+  validate:
+    name: ${{ matrix.job.name }}
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    strategy:
+      matrix:
+        job:
+          - name: Parse JSON
+            script: parse.ts
+          - name: Validate lastUpdated timestamps
+            script: validate-timestamps.ts
+          - name: Validate against schema
+            script: validate-schema.ts
+
+    steps:
+      - name: Checkout repository
+        if: github.event_name != 'pull_request'
+        uses: actions/checkout@v4
+      
+      - name: Checkout main branch
+        if: github.event_name == 'pull_request'
+        uses: actions/checkout@v4
+        with:
+          ref: main
+
+      - name: Checkout PR changes
+        if: github.event_name == 'pull_request'
+        uses: actions/checkout@v4
+        with:
+          path: pr
+      
+      - name: Copy core_mods.json and schema from PR
+        if: github.event_name == 'pull_request'
+        run: |
+          mv pr/core_mods.json core_mods.json
+          
+          if [[ -f pr/core_mods.schema.json ]]; then
+            mv pr/core_mods.schema.json core_mods.schema.json
+          fi
+
+          rm -rf pr
+
+      - uses: denoland/setup-deno@v2
+
+      - name: Run script ${{ matrix.job.script }}
+        shell: bash
+        run: |
+          deno run --allow-read ".github/scripts/${{ matrix.job.script }}"
+        
\ No newline at end of file
diff --git a/.vscode/extensions.json b/.vscode/extensions.json
new file mode 100644
index 0000000..67b06df
--- /dev/null
+++ b/.vscode/extensions.json
@@ -0,0 +1,6 @@
+{
+    "recommendations": [
+        "denoland.vscode-deno",
+        "github.vscode-github-actions"
+    ]
+}
\ No newline at end of file