diff --git a/core/aqua.js b/core/aqua.js
index 761c4c9..be5b803 100644
--- a/core/aqua.js
+++ b/core/aqua.js
@@ -1,11 +1,24 @@
 #!/usr/bin/env node
 const args = require('yargs').argv
 const path = require('path');
+const {compile} = require('./compiler.js');
 args.index = args.index || path.join(process.cwd(), 'index.js');
 args.cache = args.cache || path.join(process.cwd(), '.cache');
 
+console.log('a')
 let index = platformPrecompile();
+console.log('a')
 index = compileParameters(index);
+console.log('a')
+index = compileLinks(index);
+console.log('a')
+
+compile({
+	index: index,
+	cache: args.cache
+})
+console.log('a')
+
 
 /// Do all platform related things to the index file, like substituting
 /// CLI arguments, and converting from a filepath to an actual index object.
@@ -40,6 +53,20 @@ function compileParameters (index) {
 	};
 }
 
+function compileLinks (index) {
+	// TODO implement links
+
+	let entities = index.Entities;
+
+	for(const key in index.Parameters) {
+		entities = recursiveReplace(entities, `\$${key}`, index.Parameters[key]);
+	}
+
+	return {
+		Entities: entities
+	};
+}
+
 
 function recursiveReplace(obj, find, replace) {
 	switch(typeof obj) {
diff --git a/core/cache.js b/core/cache.js
index e69de29..e1e97cd 100644
--- a/core/cache.js
+++ b/core/cache.js
@@ -0,0 +1,36 @@
+const fs = require('fs');
+const path = require('path');
+
+module.exports.Cache = class Cache {
+	constructor (basePath) {
+		this.paths = {
+			base: basePath,
+			code: path.join(basePath, 'code'),
+			instances: path.join(basePath, 'instances')
+		}
+		
+		try {
+			fs.mkdirSync(this.paths.base);
+			fs.mkdirSync(this.paths.code);
+			fs.mkdirSync(this.paths.instances);
+		} catch (e) {};
+
+		this.loadCache();
+	}
+
+	loadCache() {
+		for(let file of fs.readdirSync(this.paths.code)) {
+			// TODO like... do this
+		}
+	}
+
+	addEntity(name, code) {
+		console.log(`writing ${name}...`);
+		fs.writeFileSync(path.join(this.paths.code, `${name}.js`), code);
+	}
+
+	addInstance(instance) {
+		console.log(`writing ${instance}...`);
+		fs.writeFileSync(path.join(this.paths.instances, `${instance._id}.json`), JSON.stringify(instance, null, 2));
+	}
+}
\ No newline at end of file
diff --git a/core/compiler.js b/core/compiler.js
new file mode 100644
index 0000000..f2f24cd
--- /dev/null
+++ b/core/compiler.js
@@ -0,0 +1,26 @@
+const {Cache} = require('./cache.js');
+const {retrieveModule} = require('./retrieveModule.js');
+
+
+module.exports.compile = compile;
+
+
+/// cache is the (likely path) string to describe where the cache is store
+/// on the web this might be a database name for example.
+/// index, is the post pre compiled index.
+async function compile({cache: cachePath, index}) {
+	const cache = new Cache(cachePath);
+	// const modules = {};
+
+	for(const symbol in index.Entities) {
+		console.log(symbol)
+		const module = index.Entities[symbol];
+		let code = await retrieveModule(module.From, module.Name);
+		// modules[module.Name] = code;
+		cache.addEntity(module.Name, code);
+	}
+
+	for(const symbol in index.Entities) {
+		cache.addInstance(index.Entities[symbol]);
+	}
+}
\ No newline at end of file
diff --git a/core/retrieveModule.js b/core/retrieveModule.js
new file mode 100644
index 0000000..88699c1
--- /dev/null
+++ b/core/retrieveModule.js
@@ -0,0 +1,13 @@
+const path = require('path');
+const fs = require('fs');
+
+
+module.exports.retrieveModule = retrieveModule;
+
+function retrieveModule(source, name) {
+	return new Promise (res => {
+		fs.readFile(path.join(source, `${name}.js`), (err, data) => {
+			res(data.toString());
+		})
+	})
+}
\ No newline at end of file
diff --git a/tests/system/.cache/code/module.js b/tests/system/.cache/code/module.js
new file mode 100644
index 0000000..a639630
--- /dev/null
+++ b/tests/system/.cache/code/module.js
@@ -0,0 +1,14 @@
+
+
+module.exports.entity = class module {
+	async OnStart() {
+		console.log('starting...');
+		await new Promise(res => {
+			setTimeout(_ => {
+				console.log('done');
+				res();
+			}, 1000);
+		})
+	}
+}
+
diff --git a/tests/system/.cache/instances/undefined.json b/tests/system/.cache/instances/undefined.json
new file mode 100644
index 0000000..facd745
--- /dev/null
+++ b/tests/system/.cache/instances/undefined.json
@@ -0,0 +1,7 @@
+{
+  "Name": "module",
+  "From": "./../modules/",
+  "Data": {
+    "Thing": 5
+  }
+}
\ No newline at end of file