Initial config files + a hello-world-y test rule to get my feet wet.

.editorconfig

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+[*]
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.js]
+indent_style = space
+end_of_line = lf

.eslintrc

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+---
+	env:
+		node: true

index.js

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+exports.rules = {
+	"test-import-visitor": require("./lib/rules/test-import-visitor")
+};

lib/rules/test-import-visitor.js

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+module.exports = function (context) {
+	return {
+		"ImportDeclaration": function (node) {
+			context.report(node, "This is an import!");
+		}
+	};
+};

package.json

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+{
+  "name": "eslint-plugin-import",
+  "version": "0.0.1",
+  "description": "Import with sanity.",
+  "main": "index.js",
+  "directories": {
+    "test": "tests"
+  },
+  "scripts": {
+    "test": "mocha --recursive tests/"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/benmosher/eslint-plugin-import"
+  },
+  "keywords": [
+    "eslint",
+    "eslintplugin",
+    "es6",
+    "jsnext"
+  ],
+  "author": "Ben Mosher (me@benmosher.com)",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/benmosher/eslint-plugin-import/issues"
+  },
+  "homepage": "https://github.com/benmosher/eslint-plugin-import",
+  "devDependencies": {
+    "eslint": "^0.17.0",
+    "eslint-tester": "^0.6.0",
+    "mocha": "^2.2.1"
+  }
+}

tests/lib/rules/test-import-visitor.js

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+"use strict";
+
+var linter = require("eslint").linter,
+    ESLintTester = require("eslint-tester"),
+    eslintTester = new ESLintTester(linter);
+
+eslintTester.addRuleTest("lib/rules/test-import-visitor", {
+  valid: [
+    "var validVariable = true;",
+  ],
+
+  invalid: [
+    {
+      code: "import foo from 'bar'",
+      ecmaFeatures: { modules: true },
+      errors: [ { message: "This is an import!" } ]
+    }
+  ]
+});