diff --git a/README.md b/README.md
index 81fb898..44bfd5d 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,47 @@
 # le-challenge-fs
-A fs-based strategy for node-letsencrypt for setting, retrieving, and clearing ACME challenges issued by the ACME server
+
+A fs-based strategy for node-letsencrypt for setting, retrieving,
+and clearing ACME challenges issued by the ACME server
+
+This places the acme challenge in an appropriate directory in the specified `webrootPath`
+and removes it once the challenge has either completed or failed.
+
+* Safe to use with node cluster
+* Safe to use with ephemeral services (Heroku, Joyent, etc)
+
+Install
+-------
+
+```bash
+npm install --save le-challenge-fs@2.x
+```
+
+Usage
+-----
+
+```bash
+var leChallenge = require('le-challenge-fs').create({
+  webrootPath: '~/letsencrypt/srv/www/:hostname/.well-known/acme-challenge'
+, debug: false
+});
+
+var LE = require('letsencrypt');
+
+LE.create({
+  server: LE.stagingServerUrl                               // Change to LE.productionServerUrl in production
+, challenge: leChallenge
+});
+```
+
+Exposed Methods
+---------------
+
+For ACME Challenge:
+
+* `setChallange(opts, domain, key, val, done)`
+* `getChallange(domain, key, done)`
+* `removeChallange(domain, key, done)`
+
+For node-letsencrypt internals:
+
+* `getOptions()` returns the internal defaults merged with the user-supplied options
diff --git a/index.js b/index.js
new file mode 100644
index 0000000..9982539
--- /dev/null
+++ b/index.js
@@ -0,0 +1,40 @@
+'use strict';
+
+var fs = require('fs');
+var path = require('path');
+
+module.exports.agreeToTerms = function (args, agreeCb) {
+  agreeCb(null, args.agreeTos);
+};
+
+module.exports.setChallenge = function (args, domain, challengePath, keyAuthorization, done) {
+  //var hostname = args.domains[0];
+  var mkdirp = require('mkdirp');
+
+  // TODO should be args.webrootPath
+  //console.log('args.webrootPath, challengePath');
+  //console.log(args.webrootPath, challengePath);
+  mkdirp(args.webrootPath, function (err) {
+    if (err) {
+      done(err);
+      return;
+    }
+
+    fs.writeFile(path.join(args.webrootPath, challengePath), keyAuthorization, 'utf8', function (err) {
+      done(err);
+    });
+  });
+};
+
+module.exports.getChallenge = function (args, domain, key, done) {
+  //var hostname = args.domains[0];
+
+  //console.log("getting the challenge", args, key);
+  fs.readFile(path.join(args.webrootPath, key), 'utf8', done);
+};
+
+module.exports.removeChallenge = function (args, domain, key, done) {
+  //var hostname = args.domains[0];
+
+  fs.unlink(path.join(args.webrootPath, key), done);
+};