diff --git a/.github/workflows/loop.yml b/.github/workflows/loop.yml
index 7b3a721..f9ae0a5 100644
--- a/.github/workflows/loop.yml
+++ b/.github/workflows/loop.yml
@@ -1,18 +1,12 @@
 name: loop
 on:
-  workflow_dispatch:
-  push:
-    branches: [main]
   pull_request:
-    types: [opened, synchronize, reopened, ready_for_review]
-    branches: [main]
-permissions:
-  contents: read
-  pull-requests: write
 jobs:
   loop:
     name: loop
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
         with:
@@ -25,3 +19,4 @@ jobs:
         with:
           debug: true
           github_token: ${{ secrets.GITHUB_TOKEN }}
+          openai_api_key: ${{ secrets.OPENAI_API_KEY }}
diff --git a/README.md b/README.md
index 4b0babc..60a8ca9 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,32 @@
 # ![pull-merge](/logo/svg/logo-no-background.svg)
 
 puLL-Merge is a `github-action` to add LLM capabilities to pull-requests in `github` automatically
+
+## Usage
+
+Add an action under `.github/workflow/security-action.yml` with the following content:
+
+```yaml
+name: puLL-Merge
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, ready_for_review]
+    branches: [main]
+
+jobs:
+  pull-merge:
+    name: security
+    runs-on: ubuntu-latest
+    steps:
+      - uses: brave/pull-merge@main
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          openai_key: ${{ secrets.OPENAI_KEY }}
+
+```
+
+## Testing LLM integrations (local)
+
+```bash
+$ ./run.js ./src/explainPatch.js --openaiKey=<OPENAI_KEY> --repo=brave/security-action --prnum=406
+```
\ No newline at end of file
diff --git a/action.yml b/action.yml
index 9670494..c17b092 100644
--- a/action.yml
+++ b/action.yml
@@ -1,12 +1,91 @@
 name: 'puLL-Merge'
-description: puLL-Merge is a github-action to add LLM capabilities to pull-requests in github automatically
+description: 'puLL-Merge is a github-action to add LLM capabilities to pull-requests in github automatically'
 inputs:
-outputs:
+  github_token:
+    description: |
+      Secret token to push review comments, and
+      interact with the repository systematically
+    required: true
+  openai_api_key:
+    description: |
+      API key to interact with the OpenAI endpoint
+  debug:
+    description: enables debug output for this action
+    required: false
+
+# outputs:
 runs:
   using: 'composite'
   steps:
+    - uses: actions/setup-node@8f152de45cc393bb48ce5d89d36b731f54556e65 # v4.0.0
+      with:
+        node-version: '20.x'
+    - id: npm
+      run: npm ci
+      shell: bash
     - id: llm-and-post-message
       uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
+      if: ${{ inputs.openai_api_key != '' }}
+      env:
+        OPENAI_API_KEY: ${{ inputs.openai_api_key }}
+        GITHUB_TOKEN: ${{ inputs.github_token }}
       with:
           script: |
-            console.log('implement me')
+            const { default: explainPatch } = await import('${{ github.action_path }}/src/openaiExplainPatch.js')
+
+            const watermark = `[puLL-Merge] - ${process.env.GITHUB_REPOSITORY}@${context.issue.number}`
+
+            try {
+              const patchExplained = watermark+"\n\n"+(await explainPatch({
+                openaiKey: process.env.OPENAI_API_KEY,
+                github: github,
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                prnum: context.issue.number }));
+
+              const query = `query($owner:String!, $name:String!, $prnumber:Int!) { 
+                repository(owner:$owner, name:$name) { 
+                  pullRequest(number:$prnumber) {
+                    comments(last: 100) {
+                      nodes {
+                        id
+                        author { login }
+                        body
+                        bodyHTML
+                        bodyText
+                      }
+                    }
+                  }
+                }
+              }`;
+              const variables = {
+                owner: context.repo.owner,
+                name: context.repo.repo,
+                prnumber: context.issue.number
+              }
+              const messages = (await github.graphql(query, variables)).repository.pullRequest.comments.nodes;
+
+              const deleteQuery = `mutation DeleteIssueComment($id:ID!) {
+                deleteIssueComment(input:{id:$id}) {
+                  clientMutationId
+                }
+              }`
+
+              for (var i = 0; i < messages.length; i++) {
+                if (messages[i].body.includes(watermark)) {
+                  console.log(messages[i])
+                  await github.graphql(deleteQuery, {id: messages[i].id});
+                }
+              }
+
+              github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: context.issue.number,
+                body: patchExplained
+              });
+            } catch (error) {
+              console.log(error);
+            }
+
+              
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..2c4ce4c
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,405 @@
+{
+    "name": "pull-merge",
+    "lockfileVersion": 3,
+    "requires": true,
+    "packages": {
+        "": {
+            "dependencies": {
+                "@octokit/core": "^5.0.2",
+                "openai": "^4.20.1"
+            }
+        },
+        "node_modules/@octokit/auth-token": {
+            "version": "4.0.0",
+            "resolved": "https://registry.npmjs.org/@octokit/auth-token/-/auth-token-4.0.0.tgz",
+            "integrity": "sha512-tY/msAuJo6ARbK6SPIxZrPBms3xPbfwBrulZe0Wtr/DIY9lje2HeV1uoebShn6mx7SjCHif6EjMvoREj+gZ+SA==",
+            "engines": {
+                "node": ">= 18"
+            }
+        },
+        "node_modules/@octokit/core": {
+            "version": "5.0.2",
+            "resolved": "https://registry.npmjs.org/@octokit/core/-/core-5.0.2.tgz",
+            "integrity": "sha512-cZUy1gUvd4vttMic7C0lwPed8IYXWYp8kHIMatyhY8t8n3Cpw2ILczkV5pGMPqef7v0bLo0pOHrEHarsau2Ydg==",
+            "dependencies": {
+                "@octokit/auth-token": "^4.0.0",
+                "@octokit/graphql": "^7.0.0",
+                "@octokit/request": "^8.0.2",
+                "@octokit/request-error": "^5.0.0",
+                "@octokit/types": "^12.0.0",
+                "before-after-hook": "^2.2.0",
+                "universal-user-agent": "^6.0.0"
+            },
+            "engines": {
+                "node": ">= 18"
+            }
+        },
+        "node_modules/@octokit/endpoint": {
+            "version": "9.0.4",
+            "resolved": "https://registry.npmjs.org/@octokit/endpoint/-/endpoint-9.0.4.tgz",
+            "integrity": "sha512-DWPLtr1Kz3tv8L0UvXTDP1fNwM0S+z6EJpRcvH66orY6Eld4XBMCSYsaWp4xIm61jTWxK68BrR7ibO+vSDnZqw==",
+            "dependencies": {
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+                "universal-user-agent": "^6.0.0"
+            },
+            "engines": {
+                "node": ">= 18"
+            }
+        },
+        "node_modules/@octokit/graphql": {
+            "version": "7.0.2",
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+        },
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+            "dependencies": {
+                "@octokit/endpoint": "^9.0.0",
+                "@octokit/request-error": "^5.0.0",
+                "@octokit/types": "^12.0.0",
+                "universal-user-agent": "^6.0.0"
+            },
+            "engines": {
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+        "node_modules/@octokit/request-error": {
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+            "funding": [
+                {
+                    "type": "github",
+                    "url": "https://github.com/sponsors/jimmywarting"
+                },
+                {
+                    "type": "github",
+                    "url": "https://paypal.me/jimmywarting"
+                }
+            ],
+            "engines": {
+                "node": ">=10.5.0"
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+        },
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+            },
+            "peerDependencies": {
+                "encoding": "^0.1.0"
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+                "encoding": {
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+                }
+            }
+        },
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+            "dependencies": {
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+        },
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+            "dependencies": {
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+                "@types/node-fetch": "^2.6.4",
+                "abort-controller": "^3.0.0",
+                "agentkeepalive": "^4.2.1",
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+            }
+        },
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+            }
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+        "node_modules/wrappy": {
+            "version": "1.0.2",
+            "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
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+        }
+    }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..96f9d09
--- /dev/null
+++ b/package.json
@@ -0,0 +1,11 @@
+{
+    "type": "module",
+    "bugs": {
+        "url": "https://github.com/brave/pull-merge/issues",
+        "email": "security@brave.com"
+    },
+    "dependencies": {
+        "@octokit/core": "^5.0.2",
+        "openai": "^4.20.1"
+    }
+}
diff --git a/run.js b/run.js
new file mode 100755
index 0000000..27550a5
--- /dev/null
+++ b/run.js
@@ -0,0 +1,9 @@
+#!/usr/bin/env node
+
+import { parseArgs } from 'node:util';
+const [ node, file, _module, ...args ] = process.argv;
+
+const run = (await import(_module)).default;
+const innerArgs = parseArgs({args, strict: false});
+
+console.log(await run(innerArgs.values));
\ No newline at end of file
diff --git a/src/openaiExplainPatch.js b/src/openaiExplainPatch.js
new file mode 100644
index 0000000..e248a90
--- /dev/null
+++ b/src/openaiExplainPatch.js
@@ -0,0 +1,59 @@
+import OpenAI from "openai";
+
+export default async function explainPatch({openaiKey, owner, repo, prnum,
+  githubToken=null, 
+  github=null,
+  model="gpt-4-1106-preview",
+  system_prompt="Explain the patch:\n\n",
+  max_tokens=2048,
+  temperature=1,
+  top_p=1,
+  frequency_penalty=0,
+  presence_penalty=0}) {
+
+  if (!github && !githubToken) throw RangeError("github and githubToken arguments cannot be both null");
+
+  const openai = new OpenAI({apiKey: openaiKey});
+
+  if (!github) {
+    const { Octokit } = await import("@octokit/core");
+    
+    github = new Octokit({auth: githubToken})
+  }
+
+  const {data: patchBody} = await github.request('GET /repos/{owner}/{repo}/pulls/{pull_number}', {
+    owner: owner,
+    repo: repo,
+    pull_number: prnum,
+    headers: {
+      'X-GitHub-Api-Version': '2022-11-28'
+    },
+    mediaType: {
+      format: "patch",
+    },
+  })
+
+  const aiResponse = await openai.chat.completions.create({
+    model: model,
+    messages: [
+          {
+            "role": "system",
+            "content": "Explain the patch:\n\n"
+          },
+          {
+            "role": "user",
+            "content": patchBody
+          }
+    ],
+    temperature: temperature,
+    max_tokens: max_tokens,
+    top_p: top_p,
+    frequency_penalty: frequency_penalty,
+    presence_penalty: presence_penalty,
+  });
+
+  // console.log(aiResponse);
+  // console.log(aiResponse.choices[0].message);
+
+  return aiResponse.choices[0].message.content;
+}
\ No newline at end of file