Add license file and clarify licensing

LICENSE

@@ -0,0 +1,189 @@
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README.md

@@ -34,6 +34,13 @@ That model used a 16x extension from the 2,048-token reference config and the
 step500 checkpoint. It performed better overall at 16k and 32k, and avoided the
 severe variable-tracking collapse seen in this 4k-start run.
 
+## License
+
+This checkpoint inherits the upstream Talkie model license, Apache-2.0. See
+[`LICENSE`](./LICENSE). The continued-pretraining corpus has separate dataset
+provenance and licensing documented at
+[`xlr8harder/talkie-yarn-32k-gutenberg-pre1931-265m`](https://huggingface.co/datasets/xlr8harder/talkie-yarn-32k-gutenberg-pre1931-265m).
+
 ## Checkpoint Family
 
 | Checkpoint | Role |