add contributing and license

CONTRIBUTING.md

@@ -0,0 +1,37 @@
+# Contributing to arcline-audit
+
+This project is maintained by one person. Contributions are welcome — please read this first.
+
+## Reporting bugs
+
+Open an issue with:
+- What you did
+- What you expected
+- What happened instead
+- OS, Go version, and any relevant config
+
+## Suggesting features
+
+Open an issue before writing code. A quick discussion saves everyone time — not every feature fits the scope of this tool.
+
+## Submitting a pull request
+
+1. Fork the repo and create a branch from `main`
+2. Keep changes focused — one fix or feature per PR
+3. If adding a feature, update the README to reflect it
+4. Make sure it compiles and existing behavior still works
+5. Open the PR with a clear description of what it does and why
+
+## Code style
+
+- Standard Go formatting (`gofmt`)
+- No external dependencies without a good reason
+- Prefer clear over clever
+
+## What gets merged
+
+This is a small project with a specific scope. PRs that fix real bugs or add clearly useful features will be merged. PRs that add complexity without clear benefit probably won't — no hard feelings.
+
+## License
+
+By submitting a pull request, you agree that your contribution will be licensed under the same license as this project.

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Arcline IT
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -32,3 +32,7 @@ arcline-audit example.com --out report.txt
 | Infrastructure | ASN/org, CDN detection, common open ports |
 
 See [todo.md](todo.md) for the full task list and output format spec.
+
+## License
+
+MIT — see [LICENSE](LICENSE).