docs(evidence): publish curated-only workspace contract

backend/test/workspaces-schema.test.ts

@@ -390,6 +390,58 @@ test("applies filesystem and policy defaults to the canonical descriptor", () =>
   });
 });
 
+test("defaults schema-versioned filesystem Evidence to curated documents only", () => {
+  const parsed = validateWorkspaceDescriptor({
+    ...withEvidence({
+      type: "filesystem",
+      uri: "psd-clinical/evidence",
+    }),
+    evidence: {
+      schema_version: 2,
+      source: { type: "filesystem", uri: "psd-clinical/evidence" },
+    },
+  });
+
+  expect(parsed.evidence).toMatchObject({
+    schema_version: 2,
+    source: { patterns: ["curated/**/*.md"] },
+  });
+});
+
+test("rejects a schema-versioned Evidence layout that mixes source and curated runtime patterns", () => {
+  expectSafeEvidenceError({
+    ...withEvidence({
+      type: "filesystem",
+      uri: "psd-clinical/evidence",
+    }),
+    evidence: {
+      schema_version: 2,
+      source: {
+        type: "filesystem",
+        uri: "psd-clinical/evidence",
+        patterns: ["source/**/*.md", "curated/**/*.md"],
+      },
+    },
+  }, /source.*curated|curated.*source/i);
+});
+
+test("rejects a schema-versioned Evidence layout that acquires source documents at runtime", () => {
+  expectSafeEvidenceError({
+    ...withEvidence({
+      type: "filesystem",
+      uri: "psd-clinical/evidence",
+    }),
+    evidence: {
+      schema_version: 2,
+      source: {
+        type: "filesystem",
+        uri: "psd-clinical/evidence",
+        patterns: ["source/**/*.md"],
+      },
+    },
+  }, /curated/i);
+});
+
 test("keeps evidence optional on schema v3", () => {
   expect(validateWorkspaceDescriptor(validWorkspaceObject())).not.toHaveProperty("evidence");
 });