Refactor code structure for improved readability and maintainability; optimize performance in key functions.

docs/schemas/predicates/sbom.v1.schema.json

@@ -0,0 +1,40 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://stella.ops/predicates/sbom@v1",
+  "title": "StellaOps SBOM Attestation Predicate",
+  "description": "Predicate for SBOM attestations linking software bill of materials to artifacts.",
+  "type": "object",
+  "required": ["format", "digest", "componentCount"],
+  "properties": {
+    "format": {
+      "type": "string",
+      "enum": ["cyclonedx-1.6", "spdx-3.0.1", "spdx-2.3"],
+      "description": "SBOM format specification."
+    },
+    "digest": {
+      "type": "string",
+      "pattern": "^sha256:[a-f0-9]{64}$",
+      "description": "Content-addressed digest of the SBOM document."
+    },
+    "componentCount": {
+      "type": "integer",
+      "minimum": 0,
+      "description": "Number of components in the SBOM."
+    },
+    "uri": {
+      "type": "string",
+      "format": "uri",
+      "description": "URI where the full SBOM can be retrieved."
+    },
+    "tooling": {
+      "type": "string",
+      "description": "Tool used to generate the SBOM."
+    },
+    "createdAt": {
+      "type": "string",
+      "format": "date-time",
+      "description": "When the SBOM was generated."
+    }
+  },
+  "additionalProperties": false
+}