Document Promptkit development and releases

README.md

@@ -1,3 +1,18 @@
-# PromptKit
+# Promptkit
 
-TODO
+Promptkit is the reusable Go prompt-execution framework being separated from
+Scriptorium. Its module path is:
+
+```text
+gitea.maximumdirect.net/eric/promptkit
+```
+
+The repository currently provides the independent Go module and its root public
+package boundary. Framework behavior and consumer APIs have not yet been
+extracted, so there is no installation or usage example at this time.
+
+Contributors should start with the [development guide](docs/development.md).
+The [architecture policy](docs/policy/architecture.md) defines the library
+boundary and constraints that future framework work must preserve.
+
+Promptkit is licensed under the [GNU General Public License version 3](LICENSE).