diff --git a/packages/affinescript-cli/bin/affinescript.js b/packages/affinescript-cli/bin/affinescript.js
new file mode 100755
index 00000000..a01690f6
--- /dev/null
+++ b/packages/affinescript-cli/bin/affinescript.js
@@ -0,0 +1,16 @@
+#!/usr/bin/env node
+// SPDX-License-Identifier: MPL-2.0
+// Copyright (c) 2026 Jonathan D.A. Jewell (hyperpolymath) <j.d.a.jewell@open.ac.uk>
+//
+// Executable entry point for the `affinescript` command.
+//
+// WHY THIS FILE EXISTS. `mod.js` already self-executes when it is the entry
+// module, but it carries no hashbang, so it cannot be the target of a
+// package.json `bin` field on Unix. This wrapper adds the hashbang and nothing
+// else — all behaviour stays in mod.js.
+import { run } from "../mod.js";
+
+const argv = typeof Deno !== "undefined" ? Deno.args : process.argv.slice(2);
+const code = await run(argv);
+if (typeof Deno !== "undefined") Deno.exit(code);
+else process.exit(code);
diff --git a/packages/affinescript-cli/package.json b/packages/affinescript-cli/package.json
new file mode 100644
index 00000000..c5dc19b5
--- /dev/null
+++ b/packages/affinescript-cli/package.json
@@ -0,0 +1,30 @@
+{
+  "name": "@hyperpolymath/affinescript",
+  "version": "0.1.2",
+  "description": "Ergonomic front door for the AffineScript compiler: downloads the pinned native binary for the host platform, verifies its SHA-256, caches it, and execs it.",
+  "license": "MPL-2.0",
+  "type": "module",
+  "bin": {
+    "affinescript": "./bin/affinescript.js"
+  },
+  "exports": {
+    ".": "./mod.js"
+  },
+  "files": [
+    "bin/affinescript.js",
+    "mod.js",
+    "pins.js",
+    "mod.d.affine"
+  ],
+  "engines": {
+    "bun": ">=1.0.0",
+    "node": ">=18.0.0"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/hyperpolymath/affinescript.git",
+    "directory": "packages/affinescript-cli"
+  },
+  "homepage": "https://github.com/hyperpolymath/affinescript",
+  "keywords": ["affinescript", "compiler", "affine-types", "wasm"]
+}