diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..c2a79c6
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,26 @@
+PROPRIETARY NOTICE — ALL RIGHTS RESERVED
+
+Copyright (c) 2026 Fatih Emre Sarman. All rights reserved.
+
+For original copyrightable code, documentation, artwork, designs and other
+materials in this repository owned by Fatih Emre Sarman, no license is granted
+to use, copy, reproduce, adapt, modify, distribute, publish, sublicense,
+commercialize, or create derivative works without prior written permission,
+except to the extent permitted by mandatory applicable law, previously valid
+licenses, and the GitHub Terms of Service for GitHub-hosted public content.
+
+This is not an open-source license. Public visibility of a repository is not
+a general grant of permission to use its author's original work.
+
+THIRD-PARTY RIGHTS AND PRE-EXISTING GRANTS
+This notice does not claim ownership of code, samples, tutorials, dependencies,
+media, trademarks, datasets, contributions or other material owned by third
+parties. Their rights and license terms remain in force. This notice does not
+override or revoke rights granted under applicable licenses for earlier
+versions, contributions, or independently licensed components.
+
+For permission to reuse material owned by Fatih Emre Sarman, contact the
+repository owner through GitHub.
+
+THE MATERIAL IS PROVIDED AS IS, WITHOUT WARRANTIES OF ANY KIND TO THE EXTENT
+PERMITTED BY LAW.
diff --git a/README.md b/README.md
index 77f9241..d6f19b9 100644
--- a/README.md
+++ b/README.md
@@ -216,7 +216,7 @@ For test inventory details, see [Release Candidate Notes](docs/releases/v0.2.0-r
 - **Unrecognized Markup Behavior:** Completely unrecognized HTML containing no expected `match` elements (e.g. an unexpected full-page redesign or bot-challenge returned with HTTP 200) currently produces an empty result array `[]`.
 - **Currency Code Omission:** The public Listing contract provides a numeric `price` but does not carry an ISO 4217 currency code.
 - **Deployment Protections:** This milestone does not implement application-level rate limiting or production monitoring. The application is intended for deployment behind a managed reverse proxy or API gateway (such as YARP, Nginx, or Cloudflare) configured with appropriate rate limiting, TLS termination, and health probes.
-- **Repository Licensing:** The repository currently does not contain a declared open-source LICENSE file; public visibility does not imply open-source licensing.
+- **Repository Licensing:** Original material owned by the repository author is proprietary, all rights reserved; see [LICENSE](LICENSE). Public visibility does not grant general reuse permission. Steam/Valve content and third-party rights remain separate.
 
 ---