Add copyright headers and SPDX license info to source files

- Add copyright headers to all source files
- Configure ESLint to check for copyright headers
- Add CLAUDE.md with build commands and code style guidelines

Author: austinlparker

.eslintrc.json

@@ -1,3 +1,11 @@
 {
-  "extends": ["next/core-web-vitals", "next/typescript"]
+  "extends": ["next/core-web-vitals", "next/typescript"],
+  "plugins": ["header"],
+  "rules": {
+    "header/header": [
+      2,
+      "block",
+      "Copyright The OpenTelemetry Authors\nSPDX-License-Identifier: Apache-2.0"
+    ]
+  }
 }

CLAUDE.md

@@ -0,0 +1,20 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Build Commands
+- `npm run dev` - Start development server
+- `npm run build` - Build for production
+- `npm run start` - Start production server
+- `npm run lint` - Run linting with ESLint
+- Testing: Use `/api/test` endpoint in development mode only
+
+## Code Style Guidelines
+- TypeScript: Strict mode with strictNullChecks enabled
+- ESLint: Extends Next.js core-web-vitals and TypeScript configs
+- Imports: Use absolute imports with `@/` prefix for src directory
+- Components: Use functional React components with TypeScript types
+- Error handling: Use try/catch with specific error types when possible
+- Naming: PascalCase for components, camelCase for functions/variables
+- Styling: Use Tailwind CSS with custom theme extensions
+- State management: Use React hooks (useState, useEffect)

eslint.config.mjs

@@ -0,0 +1,19 @@
+// eslint.config.mjs
+
+import { FlatCompat } from "@eslint/eslintrc";
+import pluginHeader from "eslint-plugin-header";
+
+pluginHeader.rules.header.meta.schema = false;
+
+const compat = new FlatCompat({
+  // import.meta.dirname is available after Node.js v20.11.0
+  baseDirectory: import.meta.dirname,
+});
+
+const eslintConfig = [
+  ...compat.config({
+    extends: ["next", "next/core-web-vitals", "next/typescript"],
+  }),
+];
+
+export default eslintConfig;

package-lock.json

@@ -26,6 +26,7 @@
     "@types/react-dom": "^18",
     "eslint": "^9.0.0",
     "eslint-config-next": "15.3.1",
+    "eslint-plugin-header": "^3.1.1",
     "postcss": "^8",
     "tailwindcss": "^3.4.1",
     "typescript": "^5"

package.json

@@ -1,3 +1,8 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 import { revalidatePath } from "next/cache";
 import { NextRequest } from "next/server";
 

src/app/api/revalidate/route.ts

@@ -1,3 +1,8 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 import { saveEntry } from "@/lib/store";
 import { ChangelogEntry } from "@/types/entry";
 

src/app/api/test/route.ts

@@ -1,3 +1,8 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 import { NextRequest } from "next/server";
 import { saveEntry } from "@/lib/store";
 import { ChangelogEntry } from "@/types/entry";

src/app/api/webhook/route.ts

@@ -1,3 +1,8 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 import { getAllEntries } from "@/lib/store";
 
 export const dynamic = "force-dynamic";

src/app/feed/route.ts

@@ -1,3 +1,8 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
 import type { Metadata } from "next";
 import localFont from "next/font/local";
 import "./globals.css";