diff --git a/src/prelude/index.ts b/src/prelude/index.ts
index 488414b..6ec11d9 100644
--- a/src/prelude/index.ts
+++ b/src/prelude/index.ts
@@ -41,6 +41,10 @@ export const globals = {
     return typeof v !== 'string' || this.scope.has(v)
   },
 
+  // env
+  args: Bun.argv.slice(1),
+  exit: (num: number) => process.exit(num ?? 0),
+
   // type predicates
   'string?': (v: any) => toValue(v).type === 'string',
   'number?': (v: any) => toValue(v).type === 'number',
diff --git a/src/prelude/tests/info.test.ts b/src/prelude/tests/info.test.ts
index 9c24a8a..1fa5e3b 100644
--- a/src/prelude/tests/info.test.ts
+++ b/src/prelude/tests/info.test.ts
@@ -77,3 +77,17 @@ describe('introspection', () => {
     await expect(`describe 'hello'`).toEvaluateTo("#<string: \u001b[32m'hello\u001b[32m'\u001b[0m>", globals)
   })
 })
+
+describe('environment', () => {
+  test('args is an array', async () => {
+    await expect(`array? args`).toEvaluateTo(true, globals)
+  })
+
+  test('args can be accessed', async () => {
+    await expect(`type args`).toEvaluateTo('array', globals)
+  })
+
+  test('', async () => {
+    await expect(`list.first args | str.ends-with? 'shrimp.test.ts'`).toEvaluateTo(true)
+  })
+})
diff --git a/src/prelude/tests/prelude.test.ts b/src/prelude/tests/prelude.test.ts
index 069b174..86341d3 100644
--- a/src/prelude/tests/prelude.test.ts
+++ b/src/prelude/tests/prelude.test.ts
@@ -66,6 +66,7 @@ describe('string operations', () => {
   test('slice extracts substring', async () => {
     await expect(`str.slice 'hello' 1 3`).toEvaluateTo('el')
     await expect(`str.slice 'hello' 2 null`).toEvaluateTo('llo')
+    await expect(`str.slice 'hello' 2`).toEvaluateTo('llo')
   })
 
   test('repeat repeats string', async () => {