feat(card): P3 polish — add hero, what-is-NOT, how-to-work (doctrine v6)

README.md

@@ -68,6 +68,35 @@ This dataset contains the full source tree of [szl-holdings/amaru](https://githu
 
 ---
 
+
+## How to work it
+
+```bash
+# Download the source snapshot
+hf download SZLHOLDINGS/amaru-source \
+  --repo-type dataset \
+  --local-dir ./amaru-source
+
+# Browse the source tree
+ls ./amaru-source/
+```
+
+```bash
+# Clone the canonical GitHub source directly
+git clone https://github.com/szl-holdings/amaru
+```
+
+---
+
+## What this is NOT
+
+- **Not a deployable artifact** — this is a source mirror for discoverability; the canonical source is [https://github.com/szl-holdings/amaru](https://github.com/szl-holdings/amaru)
+- **Not training data** — this dataset contains amaru memory attestation source files, not ML training examples
+- **Not a live-updating feed** — the dataset is a point-in-time snapshot at the commit SHA above
+- **Not a complete mirror** — excludes `.git/`, `node_modules/`, and binaries > 50 MB
+
+---
+
 ## ⚖️ License
 
 Distributed under **Proprietary**. See the [LICENSE](https://github.com/szl-holdings/amaru/blob/main/LICENSE) file in the source repository.