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README.md

@@ -1,5 +1,5 @@
 ---
-license: cc-by-nc-4.0
+license: apache-2.0
 language: [en, pt]
 tags:
   - world-model
@@ -55,6 +55,14 @@ implementation** (Apache-2.0 source, no weights). To use:
 
 Full definitions and conformance tests in [`gemeo_architecture_spec_v1.md`](./gemeo_architecture_spec_v1.md).
 
+## Licensing & scope
+
+**Open the recipe, keep the spice.**
+
+- **This repo (architecture spec + reference implementation):** Apache-2.0 — adopt and build on it freely, with attribution. A reference architecture only becomes a standard if people can use it.
+- **Trained weights** (`gemeo-sus-v6`, …) and the **RareBench-BR benchmark:** CC-BY-NC 4.0 — no commercial reuse of our trained artifacts/data without a separate agreement.
+- **Held back on purpose:** the proprietary DATASUS ETL (raw extraction, CNS-hash linkage, trajectory construction), the cohort/preprocessing heuristics, and the future multimodal (Mayo) substrate. The reference `meds_export.py` consumes an already-built trajectory file — it does not produce one.
+
 ## Citation
 
 ```bibtex