Add SECURITY.md, fix workflow permissions, redesign README

.github/workflows/sync-check.yml

@@ -1,5 +1,7 @@
 name: Sync check
 on: [push, pull_request]
+permissions:
+  contents: read
 jobs:
   sync-check:
     runs-on: ubuntu-latest

.github/workflows/test.yml

@@ -1,5 +1,7 @@
 name: Tests
 on: [push, pull_request]
+permissions:
+  contents: read
 jobs:
   test:
     runs-on: ubuntu-latest

README.md

@@ -1,10 +1,25 @@
-![Code Cannon](.github/assets/readme-header.png)
-
-[![CI](https://github.com/LightbridgeLab/CodeCannon/actions/workflows/sync-check.yml/badge.svg)](https://github.com/LightbridgeLab/CodeCannon/actions/workflows/sync-check.yml) [![Tests](https://github.com/LightbridgeLab/CodeCannon/actions/workflows/test.yml/badge.svg)](https://github.com/LightbridgeLab/CodeCannon/actions/workflows/test.yml) [![codecov](https://codecov.io/gh/LightbridgeLab/CodeCannon/branch/main/graph/badge.svg)](https://codecov.io/gh/LightbridgeLab/CodeCannon) [![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](LICENSE) [![GitHub release](https://img.shields.io/github/v/release/LightbridgeLab/CodeCannon)](https://github.com/LightbridgeLab/CodeCannon/releases) [![Last Commit](https://img.shields.io/github/last-commit/LightbridgeLab/CodeCannon)](https://github.com/LightbridgeLab/CodeCannon/commits) [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](docs/contributing.md) [![Python](https://img.shields.io/badge/Python-3.x-blue?logo=python&logoColor=white)](sync.py) [![Install](https://img.shields.io/badge/install-git%20submodule-blue?logo=git&logoColor=white)](https://github.com/LightbridgeLab/CodeCannon#quick-start)
-
-# Code Cannon
-
-Write your team's AI agent workflow once — start, submit-for-review, review, deploy — and sync it to Claude Code, Cursor, Gemini, and Codex across all your projects.
+<h1 align="center">Code Cannon</h1>
+<p align="center">
+  <strong>Write your AI agent workflow once. Sync it everywhere.</strong>
+</p>
+<p align="center">
+  Portable skills for Claude Code, Cursor, Gemini, and Codex — start, review, deploy — across all your projects.
+</p>
+<p align="center">
+  <a href="https://github.com/LightbridgeLab/CodeCannon/actions/workflows/sync-check.yml"><img src="https://github.com/LightbridgeLab/CodeCannon/actions/workflows/sync-check.yml/badge.svg" alt="CI"></a>
+  <a href="https://github.com/LightbridgeLab/CodeCannon/actions/workflows/test.yml"><img src="https://github.com/LightbridgeLab/CodeCannon/actions/workflows/test.yml/badge.svg" alt="Tests"></a>
+  <a href="https://codecov.io/gh/LightbridgeLab/CodeCannon"><img src="https://codecov.io/gh/LightbridgeLab/CodeCannon/branch/main/graph/badge.svg" alt="codecov"></a>
+  <a href="LICENSE"><img src="https://img.shields.io/badge/License-MIT-blue.svg" alt="License: MIT"></a>
+  <a href="https://github.com/LightbridgeLab/CodeCannon/releases"><img src="https://img.shields.io/github/v/release/LightbridgeLab/CodeCannon" alt="GitHub release"></a>
+  <a href="https://github.com/LightbridgeLab/CodeCannon/commits"><img src="https://img.shields.io/github/last-commit/LightbridgeLab/CodeCannon" alt="Last Commit"></a>
+  <a href="docs/contributing.md"><img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg" alt="PRs Welcome"></a>
+  <a href="sync.py"><img src="https://img.shields.io/badge/Python-3.x-blue?logo=python&logoColor=white" alt="Python"></a>
+  <a href="https://github.com/LightbridgeLab/CodeCannon#quick-start"><img src="https://img.shields.io/badge/install-git%20submodule-blue?logo=git&logoColor=white" alt="Install"></a>
+</p>
+
+<p align="center">
+  <img src=".github/assets/readme-header.png" alt="Code Cannon" />
+</p>
 
 ## The problem
 

SECURITY.md

@@ -0,0 +1,24 @@
+# Security Policy
+
+## Supported Versions
+
+| Version | Supported          |
+|---------|--------------------|
+| Latest  | :white_check_mark: |
+| Older   | :x:                |
+
+Only the latest release receives security fixes. We recommend always using the most recent version.
+
+## Reporting a Vulnerability
+
+Code Cannon is a developer tool that generates static configuration files. It does not run a server, handle user credentials, or process sensitive data. The attack surface is limited to the sync script and generated output.
+
+If you discover a security issue, please **open a GitHub Issue** in this repository with the label `security`. Include:
+
+- A description of the vulnerability
+- Steps to reproduce
+- The potential impact
+
+We will acknowledge the report within 7 days and aim to provide a fix or mitigation within 30 days, depending on severity.
+
+For issues that could enable supply-chain attacks (e.g., generating malicious output files), please email the maintainers directly rather than opening a public issue. Contact information is available in the repository's GitHub profile.