Support Snapshot artifacts in Ranker bridge

scripts/check-rank-feedback.mjs

@@ -237,6 +237,47 @@ try {
   assert.equal(nestedConcept.ranked.find(item => item.id === 'lesson-library').lane.id, 'park');
   assert.deepEqual(nestedConcept.handoff.warnings, []);
 
+  const snapshotOnlyResponse = await fetch(`${base}/api/rank-feedback`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({
+      sourceName: 'Scattermind',
+      schema: 'scattermind-snapshot-v1',
+      idea: 'Scattermind has only produced a Snapshot so far; Ranker should still defend a tiny continuation order.',
+      mode: 'mvp',
+      snapshot: {
+        id: 'snapshot_only_17',
+        title: 'Tiny audit service snapshot',
+        originalPrompt: 'I want to sell a small audit service but do not know what to build first.',
+        targetAudience: 'Overwhelmed solo service seller',
+        context: {
+          constraints: ['Manual proof before product shell'],
+          nonGoals: ['Avoid accounts and saved workspaces'],
+          assumptions: ['A one-page promise can validate demand'],
+        },
+        nextActions: [
+          { id: 'promise-proof', action: 'One-page promise proof', why: 'Use the Snapshot to test whether buyers understand the outcome before building app machinery.', evidence: 'Can 3 service sellers say what they would buy and why?', rankerHints: { value: 9, effort: 2, confidence: 8, urgency: 8, risk: 2 } },
+          { id: 'copyable-brief', action: 'Copyable audit brief', why: 'Turn the defended order into a plain text follow-up.', evidence: 'Does the copied brief make the next move obvious?', suggestedLane: 'validate-next' },
+        ],
+        parkingLot: [
+          { id: 'seller-workspace', action: 'Saved seller workspace', why: 'Accounts, saved projects, dashboard, billing, and collaboration for each service seller.', evidence: 'No proof yet' },
+        ],
+      },
+    }),
+  });
+  assert.equal(snapshotOnlyResponse.status, 200);
+  const snapshotOnly = await snapshotOnlyResponse.json();
+  assert.equal(snapshotOnly.input.provenance.artifactId, 'snapshot_only_17');
+  assert.equal(snapshotOnly.input.provenance.snapshotTitle, 'Tiny audit service snapshot');
+  assert.equal(snapshotOnly.input.decisionContext.targetAudience, 'Overwhelmed solo service seller');
+  assert.deepEqual(snapshotOnly.input.decisionContext.nonGoals, ['Avoid accounts and saved workspaces']);
+  assert.equal(snapshotOnly.ranked[0].id, 'promise-proof', 'Snapshot nextActions should rank without waiting for a Concept Map wrapper');
+  assert.equal(snapshotOnly.ranked.find(item => item.id === 'promise-proof').provenance.sourceSection, 'snapshot.nextActions');
+  assert.equal(snapshotOnly.ranked.find(item => item.id === 'copyable-brief').lane.id, 'test');
+  assert.equal(snapshotOnly.ranked.find(item => item.id === 'seller-workspace').lane.id, 'park');
+  assert.equal(snapshotOnly.handoff.source.requiresSourceTrace, true);
+  assert.deepEqual(snapshotOnly.handoff.warnings, []);
+
   const sectionedConceptResponse = await fetch(`${base}/api/rank-feedback`, {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },