diff --git a/probot/presolver/index.js b/probot/presolver/index.js
index f5f16cd1d6..f7ccc363f1 100644
--- a/probot/presolver/index.js
+++ b/probot/presolver/index.js
@@ -1,4 +1,33 @@
-module.exports = app => {
+const Presolver = require('./lib/presolver');
+
+function probotPlugin(robot) {
+  const events = [
+    "pull_request.opened",
+    "pull_request.edited",
+    "pull_request.synchronize",
+    "pull_request.reopened"
+  ];
+
+  robot.on(events, presolve);
+}
+
+async function presolve(context) {
+  const presolverContext = getRepository(context);
+  const pullRequest = getPullRequest(context);
+}
+
+function getRepository(context) {
+  const config = Object.assign(context.repo());
+  return new Presolver(context.github, config);
+}
+
+function getPullRequest(context) {
+  return context.payload.pull_request || context.payload.review.pull_request;
+}
+
+module.exports = probotPlugin;
+
+/*module.exports = async app => {
   // Your code here
   app.log('Yay, the app was loaded!')
 
@@ -12,4 +41,4 @@ module.exports = app => {
 
   // To get your app running against GitHub, see:
   // https://probot.github.io/docs/development/
-}
+}*/
diff --git a/probot/presolver/lib/presolver.js b/probot/presolver/lib/presolver.js
new file mode 100644
index 0000000000..c12283cf8b
--- /dev/null
+++ b/probot/presolver/lib/presolver.js
@@ -0,0 +1,41 @@
+class Presolver {
+  constructor(github, { owner, repo, logger = console, ...config }) {
+    this.github = github;
+    this.logger = logger;
+    this.config = Object.assign({
+      owner,
+      repo
+    });
+    this.pullRequest = {};
+  }
+
+  static get STATE() {
+    return Object.freeze({
+      CLASH: 'clashing'
+    })
+    
+  async _getClashingRanges(pullRequest) {
+    Object.assign(this.pullRequest, pullRequest);
+    const { owner, repo } = this.config;
+    const number = this.pullRequest.number;
+
+    const prs = (await this.github.pullRequests.get({ owner, repo }))
+      .data || [];
+      this.logger(prs)
+    prs.forEach(function(pr){
+      const files = pr.files()
+    })
+  }
+  
+  async presolve(pullRequest) {
+    Object.assign(this.pullRequest, pullRequest);
+    const { owner, repo } = this.config;
+    const number = this.pullRequest.number;
+
+    const state = await this._getClashingRanges(pullRequest);
+
+  }
+
+}
+
+module.exports = Presolver;
\ No newline at end of file