diff --git a/.prettierrc b/.prettierrc
new file mode 100644
index 0000000..2c5ec4a
--- /dev/null
+++ b/.prettierrc
@@ -0,0 +1,8 @@
+{
+  "bracketSpacing": true,
+  "printWidth": 80,
+  "singleQuote": true,
+  "tabWidth": 4,
+  "trailingComma": "none",
+  "useTabs": false
+}
diff --git a/README.md b/README.md
index e82a763..3d73bd8 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,229 @@
 # greenlock-manager-test.js
 
-A simple test suite for Greenlock manager plugins.
\ No newline at end of file
+A simple test suite for Greenlock manager plugins.
+
+# Greenlock Manager
+
+A greenlock manager is just a set of a few callbacks to keeps track of:
+
+-   **Default settings** that apply to all sites such as
+    -   `subscriberEmail`
+    -   `agreeToTerms`
+    -   `store` (the account key and ssl certificate store)
+-   **Site settings** such as
+    -   `subject` (ex: example.com)
+    -   `altnames` (ex: example.com,www.example.com)
+    -   `renewAt` (ex: '45d')
+    -   `challenges` (plugins for 'http-01', 'dns-01', etc)
+
+The callbacks are:
+
+-   `set({ subject, altnames, renewAt })` to save site details
+-   `find({ subject, altnames, renewBefore })` which returns a list of matching sites (perhaps all sites)
+-   `remove({ subject })` which marks a site as deleted
+-   `defaults()` which either **gets** or **sets** the global configs that apply to all sites
+
+# Some Terminology
+
+-   `subject` refers to the **primary domain** on an SSL certificate
+-   `altnames` refers to the list of **domain names** on the certificate (including the subject)
+-   `renewAt` is a pre-calculated value based on `expiresAt` or `issuedAt` on the certificate
+
+Those are the only values you really have to worry about.
+
+The rest you can make up for your own needs, or they're just opaque values you'll get from Greenlock.
+
+# Do you want to build a plugin?
+
+You can start _really_ simple: just make a file that exports a `create()` function:
+
+## A great first, failing plugin:
+
+`my-plugin.js`:
+
+```js
+'use strict';
+
+var MyManager = module.exports;
+MyManager.create = function(options) {
+    console.log('The tests will make me stronger');
+    return {};
+};
+```
+
+## The test suite from heaven
+
+You write your test file, run it,
+and then you get a play-by-play of what to do.
+
+```
+npm install --save-dev greenlock-manager-test
+```
+
+`test.js`:
+
+```js
+'use strict';
+
+var Tester = require('greenlock-manager-test');
+var MyManager = require('./');
+var myConfigOptions = {
+    someApiTokenForMyManager: 'xxx'
+};
+
+Tester.test(MyManager, myConfigOptions)
+    .then(function() {
+        console.log('All Tests Passed');
+    })
+    .catch(function(err) {
+        console.error('Oops... something bad happened:');
+        console.error(err);
+    });
+```
+
+You just follow the error messages and, which a little help from this README,
+bam!, you get a working plugin. It's insane!
+
+# The lazy, hacky way.
+
+If you're going to publish a module, you should pass the full test suite.
+
+If not, eh, you can be lazy.
+
+## Bare minimum...
+
+At a bare minimum, you must implement `find()` to return an array of `{ subject, altnames }`.
+
+For example:
+
+```js
+function find(argsToIgnore) {
+    return Promise.resolve([
+        { subject: 'example.com', altnames: ['example.com', 'www.example.com'] }
+    ]);
+}
+```
+
+If that's absolutely all that you do, all of the other methods will be implemented around `greenlock-manager-fs`.
+
+# The Right Way™
+
+If you want to publish a module to the community you should do a slightly better job:
+
+```js
+module.exports.create = function(options) {
+    var manager = {};
+
+    // add some things to... wherever you save things
+
+    manager.set = async function(siteConfig) {
+        // You can see in the tests a sample of common values,
+        // but you don't really need to worry about it.
+        var subject = siteConfig;
+
+        // Cherry pick what you like for indexing / search, and JSONify the rest
+        return mergeOrCreateSite(subject, siteConfig);
+    };
+
+    // find the things you've saved before
+
+    manager.find = async function({ subject, altnames, renewBefore }) {
+        var results = [];
+        var gotten = {};
+
+        if (subject) {
+            var site = await getSiteBySubject(subject);
+            if (site) {
+                results.push(site);
+                gotten[site.subject] = true;
+            }
+        }
+
+        if (altnames) {
+            var sites = await getSiteByAltnames(subject);
+            sites.forEach(function() {});
+            if (site) {
+                if (!gotten[site.subject]) {
+                    results.push(site);
+                    gotten[site.subject] = true;
+                }
+            }
+        }
+
+        if (subject || altnames) {
+            return results;
+        }
+
+        if (renewBefore) {
+            return getSitesThatShouldBeRenewedBefore(renewBefore);
+        }
+
+        return getAllSites();
+    };
+
+    // delete a site config
+
+    manager.remove = async function({ subject }) {
+        // set deletedAt to a value, or actually delete it - however you like
+        return mergeOrCreateSite(subject, { deletedAt: Date.now() });
+    };
+
+    // get / set global things
+
+    manager.defaults = async function(options) {
+        if (!options) {
+            return getDefaultConfigValues();
+        }
+
+        return mergeDefaultConfigValues(options);
+    };
+
+    // optional, if you need it
+
+    manager.init = async function(deps) {
+        // a place to do some init, if you need it
+
+        return doMyInit();
+
+        // Also, `deps` will have some common dependencies
+        // than many modules need, such as `request`.
+        // This cuts down on stray dependencies, and helps
+        // with browser compatibility.
+
+        request = deps.request;
+    };
+};
+```
+
+# How to use your plugin
+
+The **Right Way**:
+
+```js
+var Greenlock = require('greenlock');
+var greenlock = Greenlock.create({
+    manager: '/absolute/path/to/manager'
+    someOptionYouWant: true,
+});
+```
+
+## Why no require?
+
+Okay, so you **expect** it to look like this:
+
+```js
+var Greenlock = require('greenlock');
+var greenlock = Greenlock.create({
+    // WRONG!!
+    manager: require('./relative/path/to/manager').create({
+        someOptionYouWant: true
+    })
+});
+```
+
+**NOPE**!
+
+It just has to do with some plugin architecture decisions around making the configuration
+serializable.
+
+I may go back and add the other way, but this is how it is right now.
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..b32efa6
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,13 @@
+{
+  "name": "greenlock-manager-test",
+  "version": "3.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@root/request": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/@root/request/-/request-1.4.1.tgz",
+      "integrity": "sha512-2zSP1v9VhJ3gvm4oph0C4BYCoM3Sj84/Wx4iKdt0IbqbJzfON04EodBq5dsV65UxO/aHZciUBwY2GCZcHqaTYg=="
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..3154783
--- /dev/null
+++ b/package.json
@@ -0,0 +1,28 @@
+{
+  "name": "greenlock-manager-test",
+  "version": "3.0.0",
+  "description": "A simple test suite for Greenlock manager plugins.",
+  "main": "tester.js",
+  "scripts": {
+    "test": "node tests"
+  },
+  "files": [
+    "*.js",
+    "lib"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://git.rootprojects.org/root/greenlock-manager-test.js"
+  },
+  "keywords": [
+    "Greenlock",
+    "manager",
+    "plugin"
+  ],
+  "author": "AJ ONeal <coolaj86@gmail.com> (https://coolaj86.com/)",
+  "license": "MPL-2.0",
+  "dependencies": {
+    "@root/request": "^1.4.1",
+    "greenlock-manager-fs": "^3.0.0"
+  }
+}
diff --git a/tester.js b/tester.js
new file mode 100644
index 0000000..10e16ad
--- /dev/null
+++ b/tester.js
@@ -0,0 +1,165 @@
+'use strict';
+
+var request = require('@root/request');
+
+var domains = ['example.com', 'www.example.com'];
+module.exports.test = async function(pkg, config) {
+	if ('function' !== typeof pkg.create) {
+		throw new Error(
+			'must have a create function that accepts a single options object'
+		);
+	}
+
+	var manager = pkg.create(config);
+
+	if (manager.init) {
+		await manager.init({
+			request: request
+		});
+	} else {
+		console.warn(
+			'WARN: should have an init(deps) function which returns a promise'
+		);
+	}
+
+	await manager.set({
+		subject: domains[0],
+		altnames: domains
+	});
+
+	await manager.find({}).then(function(results) {
+		if (!results.length) {
+			console.log(results);
+			throw new Error('should have found all managed sites');
+		}
+	});
+	console.log('PASS: set');
+
+	await manager.find({ subject: 'www.example.com' }).then(function(results) {
+		if (results.length) {
+			console.log(results);
+			throw new Error(
+				"shouldn't find what doesn't exist, exactly, by subject"
+			);
+		}
+	});
+
+	await manager
+		.find({ altnames: ['www.example.com'] })
+		.then(function(results) {
+			if (!results.length) {
+				console.log(results);
+				throw new Error('should have found sites matching altname');
+			}
+		});
+
+	await manager.find({ altnames: ['*.example.com'] }).then(function(results) {
+		if (results.length) {
+			console.log(results);
+			throw new Error(
+				'should only find an exact (literal) wildcard match'
+			);
+		}
+	});
+	console.log('PASS: find');
+
+	await manager.remove({ subject: '*.example.com' }).then(function(result) {
+		if (result) {
+			throw new Error(
+				'should not return prior object when deleting non-existing site'
+			);
+		}
+	});
+
+	await manager.remove({ subject: 'www.example.com' }).then(function(result) {
+		if (result) {
+			throw new Error(
+				'should not return prior object when deleting non-existing site'
+			);
+		}
+	});
+
+	await manager.remove({ subject: 'example.com' }).then(function(result) {
+		if (!result || !result.subject || !result.altnames) {
+			throw new Error('should return prior object when deleting site');
+		}
+	});
+
+	await manager
+		.find({ altnames: ['example.com', 'www.example.com'] })
+		.then(function(results) {
+			if (results.length) {
+				console.log(results);
+				throw new Error('should not find deleted sites');
+			}
+		});
+	console.log('PASS: remove');
+
+	var originalInput = {
+		serverKeyType: 'RSA-2048',
+		accountKeyType: 'P-256',
+		subscriberEmail: 'jon@example.com',
+		agreeToTerms: true,
+		store: { module: '/path/to/store-module', foo: 'foo' },
+		challenges: {
+			'http-01': { module: '/path/to/http-01-module', bar: 'bar' },
+			'dns-01': { module: '/path/to/dns-01-module', baz: 'baz' },
+			'tls-alpn-01': {
+				module: '/path/to/tls-alpn-01-module',
+				qux: 'quux'
+			}
+		},
+		customerEmail: 'jane@example.com'
+	};
+	//var backup = JSON.parse(JSON.stringify(originalInput));
+	var configUpdate = {
+		renewOffset: '45d',
+		renewStagger: '12h',
+		subscriberEmail: 'pat@example.com'
+	};
+
+	var internalConfig;
+	await manager.defaults().then(function(result) {
+		internalConfig = result;
+		if (!result) {
+			throw new Error(
+				'should at least return an empty object, perhaps one with some defaults set'
+			);
+		}
+	});
+
+	await manager.defaults(originalInput).then(function(result) {
+		// can't say much... what _should_ this return?
+		// probably nothing? or maybe the full config object?
+		if (internalConfig === result) {
+			console.warn(
+				'WARN: should return a new copy, not the same internal object'
+			);
+		}
+		if (originalInput === result) {
+			console.warn(
+				'WARN: should probably return a copy, not the original input'
+			);
+		}
+	});
+
+	await manager.defaults().then(function(result) {
+		if (originalInput === result) {
+			console.warn('WARN: should probably return a copy, not the prior input');
+		}
+	});
+
+	await manager.defaults(configUpdate).then(function() {
+		if (originalInput.renewOffset) {
+			console.warn('WARN: should probably modify the prior input');
+		}
+	});
+
+	await manager.defaults().then(function(result) {
+		if (!result.subscriberEmail || !result.renewOffset) {
+			throw new Error('should merge config values together');
+		}
+	});
+
+	console.log('PASS: defaults');
+};
diff --git a/tests/index.js b/tests/index.js
new file mode 100644
index 0000000..515b615
--- /dev/null
+++ b/tests/index.js
@@ -0,0 +1,19 @@
+'use strict';
+
+var Tester = require('../');
+
+var Manager = require('greenlock-manager-fs');
+var config = {
+	configFile: 'greenlock-manager-test.delete-me.json'
+};
+
+Tester.test(Manager, config)
+	.then(function() {
+		console.log('PASS: Known-good test module passes');
+	})
+	.catch(function(err) {
+		console.error('Oops, you broke it. Here are the details:');
+		console.error(err.stack);
+		console.error();
+		console.error("That's all I know.");
+	});