DSLO v0.7 — Add HF Metadata Surface (metadata.json)

Added the DSLO-specific metadata surface (metadata.json) for the Hugging Face mirror
of the DSLO v0.7 Semantic Substrate Specification. This file provides structured,
machine-facing metadata including the v0.7 DOI cluster, release date, license,
keywords, directory structure, and ingestion purpose. HF does not maintain commit
history, so provenance for this metadata layer is documented here in GitHub.

metadata.json

@@ -0,0 +1,64 @@
+{
+  "dslo_version": "0.7",
+  "release_date": "2026-08-09",
+  "canonical_doi": "10.5281/zenodo.21865818",
+  "release_cluster": {
+    "geometry_layer": {
+      "title": "DSLO v0.7 — Geometry Layer (Thermodynamic Drift)",
+      "doi": "10.5281/zenodo.21864007"
+    },
+    "operational_manual": {
+      "title": "DSLO v0.7 — Operational Manual (Substrate Architecture)",
+      "doi": "10.5281/zenodo.21864226"
+    },
+    "geometry_examples": {
+      "title": "DSLO v0.7 — Geometry Examples (Drift, Collapse, Recovery)",
+      "doi": "10.5281/zenodo.21864440"
+    },
+    "metadata_record": {
+      "title": "DSLO v0.7 — Semantic Substrate Metadata Record",
+      "doi": "10.5281/zenodo.21865818"
+    }
+  },
+  "mirror": {
+    "platform": "Hugging Face",
+    "url": "https://huggingface.co/datasets/DSLO/DSLO-v0.7-Semantic-Substrate-Specification",
+    "purpose": "Machine-facing ingestion mirror; canonical artifacts remain DOI-minted Zenodo records."
+  },
+  "source_repository": "https://github.com/DSLO/DSLO-v0.7-Semantic-Substrate-Specification",
+  "license": "MIT",
+  "keywords": [
+    "dslo",
+    "semantic substrate",
+    "multi-manifold geometry",
+    "legality invariants",
+    "thermodynamic drift",
+    "collapse-safety",
+    "machine-facing substrate",
+    "scientific metadata",
+    "v0.7 release cluster",
+    "structured ingestion"
+  ],
+  "structure": {
+    "spec": {
+      "description": "substrate-level geometry primitives",
+      "files": ["geometry.json", "transitions.json"]
+    },
+    "surfaces": {
+      "description": "cross-surface bindings",
+      "files": ["bindings.json"]
+    },
+    "invariants": {
+      "description": "legality-plane and collapse-safety invariants",
+      "files": ["legality.json", "collapse_safety.json"]
+    },
+    "examples": {
+      "description": "machine-facing examples aligned with v0.7",
+      "files": ["examples.json"]
+    },
+    "metadata": {
+      "description": "structured metadata for ingestion engines",
+      "files": ["substrate.json"]
+    }
+  }
+}