diff --git a/src/authorization/AuthorizationChecker.js b/src/authorization/AuthorizationChecker.js
index 5ed18ec..144aeed 100644
--- a/src/authorization/AuthorizationChecker.js
+++ b/src/authorization/AuthorizationChecker.js
@@ -339,6 +339,7 @@ export class AuthorizationChecker {
        const finalResult = {
          possibility: resPossibility || 0,
          reliability: res.reliability !== undefined ? res.reliability : 1.0,
+         ...(collectValues && res.collectedValues && Array.isArray(res.collectedValues) && { collectedValues: res.collectedValues }),
          ...(includeMeta && {
            meta: { 
              ...restMeta,  // Spread meta without allow/deny
diff --git a/src/authorization/CompiledEvaluator.js b/src/authorization/CompiledEvaluator.js
index e912b36..88532c5 100644
--- a/src/authorization/CompiledEvaluator.js
+++ b/src/authorization/CompiledEvaluator.js
@@ -142,6 +142,7 @@ export class CompiledEvaluator {
     };
     const result = {
       possibility: relationStrength,
+      reliability: directRel.reliability !== undefined ? directRel.reliability : 1.0,
       possibility_allow: relationStrength,
       possibility_deny: 0,
       ...(includeMeta && {
@@ -404,6 +405,7 @@ export class CompiledEvaluator {
 
     const children = compiled.children || [compiled];
     const possibilities = [];
+    const reliabilities = [];
     const metas = [];
     const remediationOptions = [];
     const allCollectedValues = collectValues ? [] : null;
@@ -418,6 +420,7 @@ export class CompiledEvaluator {
       mergeRemediationOptions(remediationOptions, extractRemediation(res));
 
       possibilities.push(res.possibility);
+      reliabilities.push(res.reliability !== undefined ? res.reliability : 1.0);
       metas.push(includeMeta ? res.meta : null);
 
       if (collectValues && res.collectedValues && Array.isArray(res.collectedValues)) {
@@ -431,6 +434,7 @@ export class CompiledEvaluator {
         const remediation = buildRemediation(extractRemediation(res));
         return {
           possibility: res.possibility,
+          reliability: res.reliability !== undefined ? res.reliability : 1.0,
           ...(collectValues && { collectedValues: allCollectedValues }),
           ...(includeMeta && { meta: res.meta }),
           ...(remediation ? { remediation } : {})
@@ -441,6 +445,7 @@ export class CompiledEvaluator {
     if (!possibilities.length) {
       return {
         possibility: 0,
+        reliability: 1.0,
         ...(collectValues && { collectedValues: allCollectedValues }),
         ...(includeMeta && { meta: { operation: 'union', childCount: 0 } })
       };
@@ -459,8 +464,19 @@ export class CompiledEvaluator {
     const remediation = result.value === 0
       ? buildRemediation(remediationOptions.length > 0 ? { status: 'required', options: remediationOptions } : null, { status: 'required' })
       : null;
+    let unionReliability = 1.0;
+    if (includeOwaTrace && result.trace && typeof result.trace.selectedIndex === 'number') {
+      unionReliability = reliabilities[result.trace.selectedIndex] ?? 1.0;
+    } else if ((compiled.aggregator || 'max') === 'min') {
+      const minP = Math.min(...possibilities);
+      unionReliability = reliabilities[possibilities.indexOf(minP)] ?? 1.0;
+    } else {
+      const maxP = Math.max(...possibilities);
+      unionReliability = reliabilities[possibilities.indexOf(maxP)] ?? 1.0;
+    }
     return {
       possibility: result.value,
+      reliability: unionReliability,
       ...(collectValues && { collectedValues: allCollectedValues }),
       ...(includeMeta && {
         meta: {
@@ -495,6 +511,7 @@ export class CompiledEvaluator {
       return this._evaluateDirectList(compiled, userId, userKey, effectiveObjectId, effectiveObjectKey, visited, currentRelation, options, 'intersection');
     }
     const possibilities = [];
+    const reliabilities = [];
     const metas = [];
     const remediationOptions = [];
     const allCollectedValues = collectValues ? [] : null;
@@ -508,6 +525,7 @@ export class CompiledEvaluator {
       const childVisited = new Set(visited);
       const res = this.evaluate(child, userId, userKey, objectId, objectKey, childVisited, currentRelation, options);
       possibilities.push(res.possibility);
+      reliabilities.push(res.reliability !== undefined ? res.reliability : 1.0);
       metas.push(includeMeta ? res.meta : null);
 
       mergeRemediationOptions(remediationOptions, extractRemediation(res));
@@ -522,6 +540,7 @@ export class CompiledEvaluator {
       if (fastPath && minPossibility !== null && res.possibility < minPossibility) {
         return {
           possibility: res.possibility,
+          reliability: res.reliability !== undefined ? res.reliability : 1.0,
           ...(collectValues && { collectedValues: allCollectedValues }),
           ...(includeMeta && { meta: res.meta })
         };
@@ -531,6 +550,7 @@ export class CompiledEvaluator {
     if (!possibilities.length) {
       return {
         possibility: 0,
+        reliability: 1.0,
         ...(collectValues && { collectedValues: allCollectedValues }),
         ...(includeMeta && { meta: { operation: 'intersection', childCount: 0 } })
       };
@@ -554,8 +574,19 @@ export class CompiledEvaluator {
     const remediation = result.value === 0
       ? buildRemediation(remediationOptions.length > 0 ? { status: 'required', options: remediationOptions } : null, { status: 'required' })
       : null;
+    let intersectionReliability = 1.0;
+    if (includeOwaTrace && result.trace && typeof result.trace.selectedIndex === 'number') {
+      intersectionReliability = reliabilities[result.trace.selectedIndex] ?? 1.0;
+    } else if ((compiled.aggregator || 'min') === 'max') {
+      const maxP = Math.max(...possibilities);
+      intersectionReliability = reliabilities[possibilities.indexOf(maxP)] ?? 1.0;
+    } else {
+      const minP = Math.min(...possibilities);
+      intersectionReliability = reliabilities[possibilities.indexOf(minP)] ?? 1.0;
+    }
     return {
       possibility: result.value,
+      reliability: intersectionReliability,
       ...(collectValues && { collectedValues: allCollectedValues }),
       ...(includeMeta && {
         meta: {
@@ -624,6 +655,9 @@ export class CompiledEvaluator {
 
     return {
       possibility,
+      // Both legs contribute to the decision, so their reliabilities
+      // multiply (consistent with TTU/chain path semantics).
+      reliability: (a.reliability !== undefined ? a.reliability : 1.0) * (b.reliability !== undefined ? b.reliability : 1.0),
       ...(collectValues && { collectedValues: allCollectedValues }),
       ...(includeMeta && {
         meta: {
@@ -652,6 +686,7 @@ export class CompiledEvaluator {
     const owaTraceOptions = includeOwaTrace ? { includeTrace: true } : null;
 
     const possibilities = [];
+    const reliabilities = [];
     const metas = [];
     const allCollectedValues = collectValues ? [] : null;
     const directRules = compiled._optimized.direct;
@@ -666,6 +701,7 @@ export class CompiledEvaluator {
 
       const possibility = directRel ? directRel.possibility : 0;
       possibilities.push(possibility);
+      reliabilities.push(directRel ? (directRel.reliability !== undefined ? directRel.reliability : 1.0) : 1.0);
       if (includeMeta) {
         const _src = directRel ? (directRel.source || 'persistent') : null;
         const _allowMeta = directRel ? {
@@ -717,6 +753,7 @@ export class CompiledEvaluator {
         if (op === 'union' && possibility >= minPossibility) {
           return {
             possibility,
+            reliability: directRel ? (directRel.reliability !== undefined ? directRel.reliability : 1.0) : 1.0,
             ...(collectValues && { collectedValues: allCollectedValues }),
             ...(includeMeta && { meta: metas[metas.length - 1] })
           };
@@ -724,6 +761,7 @@ export class CompiledEvaluator {
         if (op === 'intersection' && possibility < minPossibility) {
           return {
             possibility,
+            reliability: directRel ? (directRel.reliability !== undefined ? directRel.reliability : 1.0) : 1.0,
             ...(collectValues && { collectedValues: allCollectedValues }),
             ...(includeMeta && { meta: metas[metas.length - 1] })
           };
@@ -734,6 +772,7 @@ export class CompiledEvaluator {
     if (!possibilities.length) {
       return {
         possibility: 0,
+        reliability: 1.0,
         ...(collectValues && { collectedValues: allCollectedValues }),
         ...(includeMeta && { meta: { operation: op, childCount: 0 } })
       };
@@ -745,8 +784,20 @@ export class CompiledEvaluator {
     const aggregator = op === 'intersection' ? (compiled.aggregator || 'min') : (compiled.aggregator || 'max');
     const result = OWAFusion.fuseWithMeta(possibilities, metas, weights, aggregator, true, owaTraceOptions);
 
+    let listReliability = 1.0;
+    if (includeOwaTrace && result.trace && typeof result.trace.selectedIndex === 'number') {
+      listReliability = reliabilities[result.trace.selectedIndex] ?? 1.0;
+    } else if (aggregator === 'min') {
+      const minP = Math.min(...possibilities);
+      listReliability = reliabilities[possibilities.indexOf(minP)] ?? 1.0;
+    } else {
+      const maxP = Math.max(...possibilities);
+      listReliability = reliabilities[possibilities.indexOf(maxP)] ?? 1.0;
+    }
+
     return {
       possibility: result.value,
+      reliability: listReliability,
       ...(collectValues && { collectedValues: allCollectedValues }),
       ...(includeMeta && {
         meta: {
diff --git a/src/authorization/rules/ChainRule.js b/src/authorization/rules/ChainRule.js
index b39b391..86f11b7 100644
--- a/src/authorization/rules/ChainRule.js
+++ b/src/authorization/rules/ChainRule.js
@@ -239,13 +239,16 @@ export class ChainRule extends BaseRule {
 
             // Deduplicate: keep best path per node
             const existing = pathMap.get(nextId);
-            if (existing && existing.possibility >= nextPossibility) continue;
+            const nextReliability = (currentPath.reliability ?? 1.0) * (rel.reliability ?? 1.0);
+            if (existing && existing.possibility > nextPossibility) continue;
+            if (existing && existing.possibility === nextPossibility && (existing.reliability ?? 1.0) >= nextReliability) continue;
 
             // Create extended path
             const extendedPath = {
               id: nextId,
               key: nextKey,
               possibility: nextPossibility,
+              reliability: nextReliability,
               path: [...currentPath.path, nextKey],
               pathEntities: [...currentPath.pathEntities, { id: nextId, key: nextKey, source: rel.source || 'persistent' }]
             };
@@ -269,10 +272,18 @@ export class ChainRule extends BaseRule {
     const targetId = reverse ? userIdNum : objectIdNum;
     const targetPaths = currentPaths.filter(path => path.id === targetId);
     let finalPossibility = 0;
+    let finalReliability = 1.0;
     
     if (targetPaths.length > 0) {
-      // Use MAX across paths (disjunctive)
-      finalPossibility = Math.max(...targetPaths.map(path => path.possibility));
+      // Use MAX across paths (disjunctive); the winning path's reliability
+      // is the product of its edges' reliabilities (MIN along the chain).
+      const best = targetPaths.reduce((a, b) =>
+        (b.possibility > a.possibility ||
+         (b.possibility === a.possibility && (b.reliability ?? 1.0) > (a.reliability ?? 1.0)))
+          ? b : a
+      );
+      finalPossibility = best.possibility;
+      finalReliability = best.reliability ?? 1.0;
     }
 
     if (fastPath && finalPossibility < minPossibility) {
@@ -338,7 +349,7 @@ export class ChainRule extends BaseRule {
     // Build authorization result with single possibility value
     const authResult = {
       possibility: finalPossibility,
-      reliability: 1.0,
+      reliability: finalReliability,
       ...(includeMeta && {
         meta: finalPossibility > 0 ? {
           ruleType: 'chain',
diff --git a/src/authorization/rules/LogicalOperators.js b/src/authorization/rules/LogicalOperators.js
index b5eedef..5139707 100644
--- a/src/authorization/rules/LogicalOperators.js
+++ b/src/authorization/rules/LogicalOperators.js
@@ -791,13 +791,19 @@ export class LogicalOperators extends BaseRule {
     
     let possibility = 0;
     let resultMeta = {};
+    // Reliability mirrors the possibility combination: the base leg's
+    // reliability is eroded by requirements and defeaters (both legs of
+    // each combination matter), consistent with TTU path semantics.
+    let reliability = 1.0;
     
     // NEVER rules override everything when their evidence possibility exceeds threshold (0.5 default)
     if (neverResult && neverResult.possibility >= 0.5) {
       possibility = 0;
+      reliability = neverResult.reliability !== undefined ? neverResult.reliability : 1.0;
       resultMeta = { ...neverResult.meta, never: true };
       return {
         possibility: 0,
+        reliability,
         collectedValues: allCollectedValues,
         meta: {
           ...resultMeta,
@@ -817,6 +823,7 @@ export class LogicalOperators extends BaseRule {
     // Start with defeasible rules as base
     if (defeasibleResult) {
       possibility = defeasibleResult.possibility;
+      reliability = defeasibleResult.reliability !== undefined ? defeasibleResult.reliability : 1.0;
       resultMeta = { ...defeasibleResult.meta };
     }
     
@@ -824,6 +831,7 @@ export class LogicalOperators extends BaseRule {
     if (strictResult) {
       possibility = Math.max(possibility, strictResult.possibility);
       if (strictResult.possibility > (defeasibleResult?.possibility || 0)) {
+        reliability = strictResult.reliability !== undefined ? strictResult.reliability : 1.0;
         resultMeta = { ...strictResult.meta };
       }
     }
@@ -832,6 +840,7 @@ export class LogicalOperators extends BaseRule {
     if (requiresResult) {
       const reqStrength = requiresResult.possibility;
       possibility = possibility * reqStrength; // Requirements failure reduces possibility
+      reliability = reliability * (requiresResult.reliability !== undefined ? requiresResult.reliability : 1.0);
       if (reqStrength < 0.5) {
         resultMeta = { ...requiresResult.meta, requirementsFailed: requiresResult.meta };
       }
@@ -841,6 +850,7 @@ export class LogicalOperators extends BaseRule {
     if (defeatersResult) {
       const defeatStrength = defeatersResult.possibility;
       possibility = possibility * (1 - defeatStrength); // Defeaters erode possibility
+      reliability = reliability * (defeatersResult.reliability !== undefined ? defeatersResult.reliability : 1.0);
       if (defeatStrength > 0.5) {
         resultMeta = { ...defeatersResult.meta, defeatedBy: defeatersResult.meta };
       }
@@ -848,6 +858,7 @@ export class LogicalOperators extends BaseRule {
     
     return {
       possibility: Math.max(0, Math.min(1, possibility)),
+      reliability,
       collectedValues: allCollectedValues,
       meta: {
         ...resultMeta,
@@ -874,7 +885,7 @@ export class LogicalOperators extends BaseRule {
     const unionConfig = normalizedRule.union;
     const childRules = unionConfig.rules || [];
     
-    let possibilities = [], metas = [], reasons = [];
+    let possibilities = [], reliabilities = [], metas = [], reasons = [];
     const remediationOptions = [];
     const { fastPath = false, minPossibility = null, valueContext = null, collectValues = false, includeMeta = true, trackEvaluation = false } = options;
     const allCollectedValues = collectValues ? [] : null; // Track collected values from all child rules
@@ -893,6 +904,7 @@ export class LogicalOperators extends BaseRule {
       if (res.reason === 'cycle') reasons.push('cycle');
       mergeRemediationOptions(remediationOptions, extractRemediation(res));
       possibilities.push(res.possibility);
+      reliabilities.push(res.reliability !== undefined ? res.reliability : 1.0);
       metas.push(includeMeta ? res.meta : null);
       
       // Collect values from child rule results
@@ -917,6 +929,7 @@ export class LogicalOperators extends BaseRule {
         const remediation = buildRemediation(extractRemediation(res));
         return {
           possibility: res.possibility,
+          reliability: res.reliability !== undefined ? res.reliability : 1.0,
           ...(collectValues && { collectedValues: allCollectedValues }), // Include all collected values so far
           ...(includeMeta && { meta: res.meta }),
           ...(remediation ? { remediation } : {}),
@@ -929,6 +942,7 @@ export class LogicalOperators extends BaseRule {
     if (!possibilities.length) {
       return {
         possibility: 0,
+        reliability: 1.0,
         ...(collectValues && { collectedValues: allCollectedValues }),
         ...(includeMeta && { meta: { operation: 'union', childCount: 0 } }),
         reason: reasons.includes('cycle') ? 'cycle' : undefined
@@ -1002,8 +1016,22 @@ export class LogicalOperators extends BaseRule {
     const unionRemediation = result.value === 0
       ? buildRemediation(remediationOptions.length > 0 ? { status: 'required', options: remediationOptions } : null, { status: 'required' })
       : null;
+    // Reliability of the child driving the fused value: the OWA selected
+    // source when traced, else the max/min possibility child (max is the
+    // default union aggregator).
+    let unionReliability = 1.0;
+    if (includeOwaTrace && result.trace && typeof result.trace.selectedIndex === 'number') {
+      unionReliability = reliabilities[result.trace.selectedIndex] ?? 1.0;
+    } else if ((unionConfig.aggregator || 'max') === 'min') {
+      const minP = Math.min(...possibilities);
+      unionReliability = reliabilities[possibilities.indexOf(minP)] ?? 1.0;
+    } else {
+      const maxP = Math.max(...possibilities);
+      unionReliability = reliabilities[possibilities.indexOf(maxP)] ?? 1.0;
+    }
     return {
       possibility: result.value,
+      reliability: unionReliability,
       ...(collectValues && { collectedValues: allCollectedValues }), // Include all collected values from child rules
       ...(includeMeta && {
           meta: {
@@ -1039,7 +1067,7 @@ export class LogicalOperators extends BaseRule {
     const intersectionConfig = normalizedRule.intersection;
     const childRules = intersectionConfig.rules || [];
     
-    let possibilities = [], metas = [], reasons = [];
+    let possibilities = [], reliabilities = [], metas = [], reasons = [];
     const remediationOptions = [];
     const { fastPath = false, minPossibility = null, valueContext = null, collectValues = false, includeMeta = true, trackEvaluation = false } = options;
     const allCollectedValues = collectValues ? [] : null; // Track collected values from all child rules
@@ -1059,6 +1087,7 @@ export class LogicalOperators extends BaseRule {
       const res = this.ruleEvaluator.evaluateRule(userId, userKey, objectId, objectKey, child, visited, currentRelation, options);
       if (res.reason === 'cycle') reasons.push('cycle');
       possibilities.push(res.possibility);
+      reliabilities.push(res.reliability !== undefined ? res.reliability : 1.0);
       metas.push(includeMeta ? res.meta : null);
       mergeRemediationOptions(remediationOptions, extractRemediation(res));
       
@@ -1128,8 +1157,21 @@ export class LogicalOperators extends BaseRule {
     const intersectionRemediation = result.value === 0
       ? buildRemediation(remediationOptions.length > 0 ? { status: 'required', options: remediationOptions } : null, { status: 'required' })
       : null;
+    // Reliability of the child driving the fused value (min is the
+    // default intersection aggregator).
+    let intersectionReliability = 1.0;
+    if (includeOwaTrace && result.trace && typeof result.trace.selectedIndex === 'number') {
+      intersectionReliability = reliabilities[result.trace.selectedIndex] ?? 1.0;
+    } else if ((intersectionConfig.aggregator || 'min') === 'max') {
+      const maxP = Math.max(...possibilities);
+      intersectionReliability = reliabilities[possibilities.indexOf(maxP)] ?? 1.0;
+    } else {
+      const minP = Math.min(...possibilities);
+      intersectionReliability = reliabilities[possibilities.indexOf(minP)] ?? 1.0;
+    }
     return {
       possibility: result.value,
+      reliability: intersectionReliability,
       ...(collectValues && { collectedValues: allCollectedValues }), // Include all collected values from child rules
       ...(includeMeta && {
           meta: {
@@ -1251,6 +1293,9 @@ export class LogicalOperators extends BaseRule {
     
     return {
       possibility,
+      // Both legs contribute to the decision, so their reliabilities
+      // multiply (consistent with TTU/chain path semantics).
+      reliability: (a.reliability !== undefined ? a.reliability : 1.0) * (b.reliability !== undefined ? b.reliability : 1.0),
       // In binary mode the negated child's strength is the deny side of the
       // dual-threshold contract: deny fires when P(B) >= maxDenyPossibility.
       ...(options.binary && { possibility_deny: b.possibility ?? 0 }),
diff --git a/src/authorization/rules/MultiHopRule.js b/src/authorization/rules/MultiHopRule.js
index 963e55e..e4277f2 100644
--- a/src/authorization/rules/MultiHopRule.js
+++ b/src/authorization/rules/MultiHopRule.js
@@ -121,6 +121,7 @@ export class MultiHopRule extends BaseRule {
       new Set(), 
       [], 
       1.0, 
+      1.0,
       reverse,
       collectValuesEnabled,
       trackPaths,
@@ -162,7 +163,7 @@ export class MultiHopRule extends BaseRule {
     }
     
     // Aggregate paths to get final possibility
-    const { finalPossibility, bestPath } = this._aggregatePaths(
+    const { finalPossibility, finalReliability = 1.0, bestPath } = this._aggregatePaths(
       pathsWithValues, pathAggregation, owaWeights, evaluation, options.trackEvaluation
     );
     
@@ -215,7 +216,7 @@ export class MultiHopRule extends BaseRule {
 
     const authResult = {
       possibility: finalPossibility,
-      reliability: 1.0,
+      reliability: finalReliability,
       ...(includeMeta && {
         meta: allowMeta
       }),
@@ -231,7 +232,7 @@ export class MultiHopRule extends BaseRule {
    * @private
    */
   _findPathsAndCollectValues(startId, endId, relation, maxDepth, 
-                           visited, currentPath = [], currentPoss = 1.0, 
+                           visited, currentPath = [], currentPoss = 1.0, currentReliability = 1.0,
                            reverse = false, collectValues = true,
                            trackPaths = true,
                            stopSignal = null,
@@ -250,6 +251,7 @@ export class MultiHopRule extends BaseRule {
         nodeIds: trackPaths ? [...currentPath.map(step => step.nodeId), endId] : [endId],
         hops: currentPath.length,
         possibility: currentPoss,
+        reliability: currentReliability,
         collectedValues: [],
         pathSteps: trackPaths ? [...currentPath] : null
       };
@@ -300,6 +302,7 @@ export class MultiHopRule extends BaseRule {
       if (!nextKey) continue;
       
       const nextPoss = Math.min(currentPoss, edge.possibility ?? 1.0);
+      const nextReliability = currentReliability * (edge.reliability !== undefined ? edge.reliability : 1.0);
       if (fastPath && nextPoss < minPossibility) continue;
       
       const pathStep = (collectValues || trackPaths) ? {
@@ -321,6 +324,7 @@ export class MultiHopRule extends BaseRule {
         visited,
         nextPath,
         nextPoss,
+        nextReliability,
         reverse,
         collectValues,
         trackPaths,
@@ -346,6 +350,9 @@ export class MultiHopRule extends BaseRule {
    */
   _collectValuesFromPath(pathSteps, defaultRelation, valueFilters, valueContext) {
     const collectedValues = [];
+    // Get blurred interval from ValueManager (arbiter-level; some stubs and
+    // older layouts keep it on the relation manager)
+    const valueManager = this.arbiter.valueManager || this.arbiter.relationManager?.valueManager;
     
     for (let stepIndex = 0; stepIndex < pathSteps.length; stepIndex++) {
       const step = pathSteps[stepIndex];
@@ -375,8 +382,7 @@ export class MultiHopRule extends BaseRule {
               continue;
             }
             
-            // Get blurred interval from ValueManager
-            const blurred = this.arbiter.relationManager.valueManager.getBlurredValue(step.edge);
+            const blurred = valueManager.getBlurredValue(step.edge);
             
             if (blurred.interval) {
               const collectedValue = this._createCollectedValue(
@@ -439,7 +445,7 @@ export class MultiHopRule extends BaseRule {
                 changed_last_at: contextValue.timestamp
               };
               
-              const blurred = this.arbiter.relationManager.valueManager.getBlurredValue(tempRelation);
+              const blurred = valueManager.getBlurredValue(tempRelation);
               
               if (blurred.interval) {
                 const collectedValue = this._createCollectedValue(
@@ -503,6 +509,7 @@ export class MultiHopRule extends BaseRule {
       const path = pathsWithValues[0];
       return {
         finalPossibility: path.possibility,
+        finalReliability: path.reliability !== undefined ? path.reliability : 1.0,
         bestPath: path
       };
     }
@@ -597,7 +604,8 @@ export class MultiHopRule extends BaseRule {
     }
     
     return { 
-      finalPossibility: possibilityResult.value, 
+      finalPossibility: possibilityResult.value,
+      finalReliability: bestPath ? (bestPath.reliability !== undefined ? bestPath.reliability : 1.0) : 1.0,
       bestPath 
     };
   }
diff --git a/tests/rigor/advanced-rule-kinds.test.js b/tests/rigor/advanced-rule-kinds.test.js
index 6efef7a..aca52de 100644
--- a/tests/rigor/advanced-rule-kinds.test.js
+++ b/tests/rigor/advanced-rule-kinds.test.js
@@ -165,7 +165,7 @@ describe('Advanced rule kinds through check() (rigor)', () => {
         }),
         rigor.invariant('no action errors', (ctx) => ctx.error === null)
       ])
-    ).run({ effort: 500, seed: 'advanced-rule-kinds', maxTraceLength: 30 });
+    ).run({ effort: 500, seed: 'advanced-rule-kinds', maxTraceLength: 30 , artifacts: { dir: '', persist: 'never' }});
 
     const inv = result.crucibleVerdict;
     assert.equal(inv.passed, true, [
diff --git a/tests/rigor/authorization-config-consistency.test.js b/tests/rigor/authorization-config-consistency.test.js
index 1f52139..cb5a1d4 100644
--- a/tests/rigor/authorization-config-consistency.test.js
+++ b/tests/rigor/authorization-config-consistency.test.js
@@ -77,7 +77,7 @@ describe('Authorization config consistency (rigor)', () => {
       rigor.crucible([
         rigor.invariant('path-parity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 300, seed: 'authz-config-parity' });
+    ).run({ effort: 300, seed: 'authz-config-parity' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'path-parity');
     assert.ok(inv);
@@ -122,7 +122,7 @@ describe('Authorization config consistency (rigor)', () => {
       rigor.crucible([
         rigor.invariant('override-honored', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 300, seed: 'authz-config-override' });
+    ).run({ effort: 300, seed: 'authz-config-override' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'override-honored');
     assert.ok(inv);
@@ -170,7 +170,7 @@ describe('Authorization config consistency (rigor)', () => {
       rigor.crucible([
         rigor.invariant('remediation-contract', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 300, seed: 'authz-config-remediation' });
+    ).run({ effort: 300, seed: 'authz-config-remediation' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'remediation-contract');
     assert.ok(inv);
diff --git a/tests/rigor/authorization-graph.test.js b/tests/rigor/authorization-graph.test.js
index 124a6db..2a1673d 100644
--- a/tests/rigor/authorization-graph.test.js
+++ b/tests/rigor/authorization-graph.test.js
@@ -68,7 +68,7 @@ describe('Authorization graph semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('direct-exact', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'authz-graph-direct' });
+    ).run({ effort: 400, seed: 'authz-graph-direct' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'direct-exact');
     assert.ok(inv);
@@ -103,7 +103,7 @@ describe('Authorization graph semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('absent-denies', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 300, seed: 'authz-graph-absent' });
+    ).run({ effort: 300, seed: 'authz-graph-absent' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'absent-denies');
     assert.ok(inv);
@@ -146,7 +146,7 @@ describe('Authorization graph semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('weakest-link', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'authz-graph-chain' });
+    ).run({ effort: 400, seed: 'authz-graph-chain' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'weakest-link');
     assert.ok(inv);
@@ -196,7 +196,7 @@ describe('Authorization graph semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('disjunctive-max', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500, seed: 'authz-graph-multipath' });
+    ).run({ effort: 500, seed: 'authz-graph-multipath' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'disjunctive-max');
     assert.ok(inv);
@@ -248,7 +248,7 @@ describe('Authorization graph semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('tus-weakest-link', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'authz-graph-tus' });
+    ).run({ effort: 400, seed: 'authz-graph-tus' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'tus-weakest-link');
     assert.ok(inv);
@@ -287,7 +287,7 @@ describe('Authorization graph semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('revoke-invalidates', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 300, seed: 'authz-graph-mutation' });
+    ).run({ effort: 300, seed: 'authz-graph-mutation' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'revoke-invalidates');
     assert.ok(inv);
diff --git a/tests/rigor/batch-loading-parity.test.js b/tests/rigor/batch-loading-parity.test.js
index a798c8a..0b921b0 100644
--- a/tests/rigor/batch-loading-parity.test.js
+++ b/tests/rigor/batch-loading-parity.test.js
@@ -131,7 +131,7 @@ describe('Batch loading consistency (rigor)', () => {
       rigor.crucible([
         rigor.invariant('batch-parity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'batch-parity' });
+    ).run({ effort: 400, seed: 'batch-parity' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'batch-parity');
     assert.ok(inv);
@@ -179,7 +179,7 @@ describe('Batch loading consistency (rigor)', () => {
       rigor.crucible([
         rigor.invariant('batch-mutation-parity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'batch-mutation-parity' });
+    ).run({ effort: 400, seed: 'batch-mutation-parity' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'batch-mutation-parity');
     assert.ok(inv);
diff --git a/tests/rigor/batch-order-parity.test.js b/tests/rigor/batch-order-parity.test.js
index 7c63ffc..a7397e7 100644
--- a/tests/rigor/batch-order-parity.test.js
+++ b/tests/rigor/batch-order-parity.test.js
@@ -142,7 +142,7 @@ describe('Batch update ordering semantics (rigor)', () => {
         }),
         rigor.invariant('no action errors', (ctx) => ctx.error === null)
       ])
-    ).run({ effort: 400, seed: 'batch-order-parity', maxTraceLength: 25 });
+    ).run({ effort: 400, seed: 'batch-order-parity', maxTraceLength: 25 , artifacts: { dir: '', persist: 'never' }});
 
     const inv = result.crucibleVerdict;
     assert.equal(inv.passed, true, [
diff --git a/tests/rigor/binary-mode-parity.test.js b/tests/rigor/binary-mode-parity.test.js
index d7829fe..83e4375 100644
--- a/tests/rigor/binary-mode-parity.test.js
+++ b/tests/rigor/binary-mode-parity.test.js
@@ -292,7 +292,7 @@ describe('Binary (threshold) mode parity (rigor)', () => {
       rigor.crucible([
         rigor.invariant('binary-normal-agreement', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1200, seed: 'binary-mode-config-matrix' });
+    ).run({ effort: 1200, seed: 'binary-mode-config-matrix' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'binary-normal-agreement');
     assert.ok(inv, 'invariant missing');
@@ -350,7 +350,7 @@ describe('Binary (threshold) mode parity (rigor)', () => {
       rigor.crucible([
         rigor.invariant('mutation-freshness', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800, seed: 'binary-mode-mutation-parity' });
+    ).run({ effort: 800, seed: 'binary-mode-mutation-parity' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'mutation-freshness');
     assert.ok(inv, 'invariant missing');
diff --git a/tests/rigor/binary-partial-parity.test.js b/tests/rigor/binary-partial-parity.test.js
index 2f0be1a..230dd6f 100644
--- a/tests/rigor/binary-partial-parity.test.js
+++ b/tests/rigor/binary-partial-parity.test.js
@@ -151,7 +151,7 @@ describe('Binary mode with partial graphs (rigor)', () => {
         }),
         rigor.invariant('no action errors', (ctx) => ctx.error === null)
       ])
-    ).run({ effort: 400, seed: 'binary-partial-parity', maxTraceLength: 25 });
+    ).run({ effort: 400, seed: 'binary-partial-parity', maxTraceLength: 25 , artifacts: { dir: '', persist: 'never' }});
 
     const inv = result.crucibleVerdict;
     assert.equal(inv.passed, true, [
diff --git a/tests/rigor/cache-parity.test.js b/tests/rigor/cache-parity.test.js
index 46cd575..582e56d 100644
--- a/tests/rigor/cache-parity.test.js
+++ b/tests/rigor/cache-parity.test.js
@@ -115,7 +115,7 @@ describe('Cache correctness under mutation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('cache-parity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 600, seed: 'cache-onoff-parity' });
+    ).run({ effort: 600, seed: 'cache-onoff-parity' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'cache-parity');
     assert.ok(inv);
@@ -161,7 +161,7 @@ describe('Cache correctness under mutation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('override-cache-fresh', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'cache-override-freshness' });
+    ).run({ effort: 400, seed: 'cache-override-freshness' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'override-cache-fresh');
     assert.ok(inv);
@@ -207,7 +207,7 @@ describe('Cache correctness under mutation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('ttl-contract', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 300, seed: 'cache-ttl-contract' });
+    ).run({ effort: 300, seed: 'cache-ttl-contract' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'ttl-contract');
     assert.ok(inv);
diff --git a/tests/rigor/chain-rule.test.js b/tests/rigor/chain-rule.test.js
index 7185dbf..9059ca7 100644
--- a/tests/rigor/chain-rule.test.js
+++ b/tests/rigor/chain-rule.test.js
@@ -47,7 +47,7 @@ describe('ChainRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('empty-steps', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 200 });
+    ).run({ effort: 200 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'empty-steps');
@@ -84,7 +84,7 @@ describe('ChainRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('possibility-bounded', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'possibility-bounded');
@@ -119,7 +119,7 @@ describe('ChainRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('no-path', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500 });
+    ).run({ effort: 500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'no-path');
@@ -156,7 +156,7 @@ describe('ChainRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('one-step-pos', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'one-step-pos');
@@ -206,7 +206,7 @@ describe('ChainRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('two-step-chain', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'two-step-chain');
diff --git a/tests/rigor/challenge-proof.test.js b/tests/rigor/challenge-proof.test.js
index 471854b..38754a4 100644
--- a/tests/rigor/challenge-proof.test.js
+++ b/tests/rigor/challenge-proof.test.js
@@ -111,7 +111,7 @@ describe('PartialGraphContext.getChallengeProof (rigor)', () => {
           ({ error, errorMessage }) => !error && !errorMessage
         )
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') {
       console.log('TAP:', report.toTAP());
@@ -152,7 +152,7 @@ describe('PartialGraphContext.getChallengeProof (rigor)', () => {
       rigor.crucible([
         rigor.invariant('no-expired', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') {
       console.log('TAP:', report.toTAP());
@@ -210,7 +210,7 @@ describe('PartialGraphContext.getChallengeProof (rigor)', () => {
       rigor.crucible([
         rigor.invariant('most-recent', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') {
       console.log('TAP:', report.toTAP());
@@ -265,7 +265,7 @@ describe('PartialGraphContext.getChallengeProof (rigor)', () => {
       rigor.crucible([
         rigor.invariant('within-window', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') {
       console.log('TAP:', report.toTAP());
diff --git a/tests/rigor/challenge-rule.test.js b/tests/rigor/challenge-rule.test.js
index 9cd03dc..4ab5698 100644
--- a/tests/rigor/challenge-rule.test.js
+++ b/tests/rigor/challenge-rule.test.js
@@ -69,7 +69,7 @@ describe('ChallengeRule._resolveSubjectKey (rigor)', () => {
       rigor.crucible([
         rigor.invariant('subjectKey-wins', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1000 });
+    ).run({ effort: 1000 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'subjectKey-wins');
@@ -118,7 +118,7 @@ describe('ChallengeRule._resolveSubjectKey (rigor)', () => {
       rigor.crucible([
         rigor.invariant('subject-mapping', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'subject-mapping');
@@ -199,7 +199,7 @@ describe('ChallengeRule._resolveWithinMs (rigor)', () => {
       rigor.crucible([
         rigor.invariant('within-units', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'within-units');
@@ -262,7 +262,7 @@ describe('ChallengeRule._resolveWithinMs (rigor)', () => {
       rigor.crucible([
         rigor.invariant('within-priority', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'within-priority');
@@ -295,7 +295,7 @@ describe('ChallengeRule._resolveWithinMs (rigor)', () => {
       rigor.crucible([
         rigor.invariant('null-when-absent', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500 });
+    ).run({ effort: 500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'null-when-absent');
@@ -335,7 +335,7 @@ describe('ChallengeRule._buildRequirement (rigor)', () => {
       rigor.crucible([
         rigor.invariant('buildRequirement', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'buildRequirement');
diff --git a/tests/rigor/check-explain-agreement.test.js b/tests/rigor/check-explain-agreement.test.js
index a7a9c94..8f1f380 100644
--- a/tests/rigor/check-explain-agreement.test.js
+++ b/tests/rigor/check-explain-agreement.test.js
@@ -80,7 +80,7 @@ describe('check/explain agreement (rigor)', () => {
       rigor.crucible([
         rigor.invariant('check-explain-agree', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500, seed: 'explain-agreement' });
+    ).run({ effort: 500, seed: 'explain-agreement' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'check-explain-agree');
     assert.ok(inv);
@@ -150,7 +150,7 @@ describe('check/explain agreement (rigor)', () => {
       rigor.crucible([
         rigor.invariant('used-facts-consistent', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 600, seed: 'explain-used-facts' });
+    ).run({ effort: 600, seed: 'explain-used-facts' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'used-facts-consistent');
     assert.ok(inv);
@@ -198,7 +198,7 @@ describe('check/explain agreement (rigor)', () => {
       rigor.crucible([
         rigor.invariant('remediation-consistent', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'explain-remediation' });
+    ).run({ effort: 400, seed: 'explain-remediation' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'remediation-consistent');
     assert.ok(inv);
diff --git a/tests/rigor/comparator-full-path.test.js b/tests/rigor/comparator-full-path.test.js
index fa3f001..735fd4d 100644
--- a/tests/rigor/comparator-full-path.test.js
+++ b/tests/rigor/comparator-full-path.test.js
@@ -119,7 +119,7 @@ describe('Relational comparator full-path parity (rigor)', () => {
       rigor.crucible([
         rigor.invariant('comparator-full-path', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1200, seed: 'comparator-full-path-parity' });
+    ).run({ effort: 1200, seed: 'comparator-full-path-parity' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'comparator-full-path');
     assert.ok(inv, 'invariant missing');
@@ -168,7 +168,7 @@ describe('Relational comparator full-path parity (rigor)', () => {
       rigor.crucible([
         rigor.invariant('comparator-aggregation', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500, seed: 'comparator-aggregation' });
+    ).run({ effort: 500, seed: 'comparator-aggregation' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'comparator-aggregation');
     assert.ok(inv, 'invariant missing');
diff --git a/tests/rigor/compiled-rule-parity.test.js b/tests/rigor/compiled-rule-parity.test.js
index e65f3eb..76c3baf 100644
--- a/tests/rigor/compiled-rule-parity.test.js
+++ b/tests/rigor/compiled-rule-parity.test.js
@@ -173,7 +173,7 @@ describe('Compiled vs rule-path parity (rigor)', () => {
       rigor.crucible([
         rigor.invariant('compiled-rule-parity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 2000, seed: 'compiled-rule-config-matrix' });
+    ).run({ effort: 2000, seed: 'compiled-rule-config-matrix' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'compiled-rule-parity');
     assert.ok(inv, 'invariant missing');
diff --git a/tests/rigor/computed-rule.test.js b/tests/rigor/computed-rule.test.js
index a65240d..f4e1cf2 100644
--- a/tests/rigor/computed-rule.test.js
+++ b/tests/rigor/computed-rule.test.js
@@ -72,7 +72,7 @@ describe('ComputedRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('possibility-passthrough', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'possibility-passthrough');
@@ -108,7 +108,7 @@ describe('ComputedRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('reason-default', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500 });
+    ).run({ effort: 500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'reason-default');
@@ -145,7 +145,7 @@ describe('ComputedRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('reason-passthrough', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'reason-passthrough');
@@ -188,7 +188,7 @@ describe('ComputedRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('meta-contract', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'meta-contract');
@@ -237,7 +237,7 @@ describe('ComputedRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('collected-values-passthrough', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'collected-values-passthrough');
@@ -273,7 +273,7 @@ describe('ComputedRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('possibility-fallback-zero', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500 });
+    ).run({ effort: 500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'possibility-fallback-zero');
@@ -311,7 +311,7 @@ describe('ComputedRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('options-passthrough', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'options-passthrough');
diff --git a/tests/rigor/config-redefinition.test.js b/tests/rigor/config-redefinition.test.js
index 829c6c8..d103c53 100644
--- a/tests/rigor/config-redefinition.test.js
+++ b/tests/rigor/config-redefinition.test.js
@@ -147,7 +147,7 @@ describe('Config redefinition semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('redefine-parity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1200, seed: 'config-redefinition-parity' });
+    ).run({ effort: 1200, seed: 'config-redefinition-parity' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'redefine-parity');
     assert.ok(inv, 'invariant missing');
@@ -194,7 +194,7 @@ describe('Config redefinition semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('redefine-binary-fastpath', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800, seed: 'config-redefinition-binary' });
+    ).run({ effort: 800, seed: 'config-redefinition-binary' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'redefine-binary-fastpath');
     assert.ok(inv, 'invariant missing');
diff --git a/tests/rigor/direct-rule.test.js b/tests/rigor/direct-rule.test.js
index c493ce1..96d58f0 100644
--- a/tests/rigor/direct-rule.test.js
+++ b/tests/rigor/direct-rule.test.js
@@ -84,7 +84,7 @@ describe('DirectRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('no-relation-fallback', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'no-relation-fallback');
@@ -138,7 +138,7 @@ describe('DirectRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('relation-strength-preserved', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'relation-strength-preserved');
@@ -186,7 +186,7 @@ describe('DirectRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('reverse-routing', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'reverse-routing');
@@ -236,7 +236,7 @@ describe('DirectRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('fastPath-early-exit', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'fastPath-early-exit');
@@ -278,7 +278,7 @@ describe('DirectRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('collectValues-disabled', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'collectValues-disabled');
@@ -332,7 +332,7 @@ describe('DirectRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('collectValues-default', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'collectValues-default');
@@ -393,7 +393,7 @@ describe('DirectRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('relation-precedence', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'relation-precedence');
@@ -449,7 +449,7 @@ describe('DirectRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('result-shape-stable', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'result-shape-stable');
diff --git a/tests/rigor/dsl-compiler.test.js b/tests/rigor/dsl-compiler.test.js
index 5893ea0..5dcbf97 100644
--- a/tests/rigor/dsl-compiler.test.js
+++ b/tests/rigor/dsl-compiler.test.js
@@ -93,7 +93,7 @@ describe('DSLCompiler → engine rule mapping (rigor)', () => {
       rigor.crucible([
         rigor.invariant('direct-emission', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'direct-emission');
@@ -128,7 +128,7 @@ describe('DSLCompiler → engine rule mapping (rigor)', () => {
       rigor.crucible([
         rigor.invariant('tus-emission', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 200 });
+    ).run({ effort: 200 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'tus-emission');
@@ -160,7 +160,7 @@ describe('DSLCompiler → engine rule mapping (rigor)', () => {
       rigor.crucible([
         rigor.invariant('parent-emission', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 200 });
+    ).run({ effort: 200 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'parent-emission');
@@ -197,7 +197,7 @@ describe('DSLCompiler → engine rule mapping (rigor)', () => {
       rigor.crucible([
         rigor.invariant('chain-emission', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 200 });
+    ).run({ effort: 200 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'chain-emission');
@@ -246,7 +246,7 @@ describe('DSLCompiler → engine rule mapping (rigor)', () => {
       rigor.crucible([
         rigor.invariant('multi_hop-emission', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 200 });
+    ).run({ effort: 200 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'multi_hop-emission');
@@ -288,7 +288,7 @@ describe('DSLCompiler → engine rule mapping (rigor)', () => {
       rigor.crucible([
         rigor.invariant('logical-emission', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'logical-emission');
@@ -323,7 +323,7 @@ describe('DSLCompiler → engine rule mapping (rigor)', () => {
       rigor.crucible([
         rigor.invariant('relational-comparator-emission', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'relational-comparator-emission');
@@ -371,7 +371,7 @@ describe('DSLCompiler → engine rule mapping (rigor)', () => {
       rigor.crucible([
         rigor.invariant('mapping-consistency', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'mapping-consistency');
diff --git a/tests/rigor/dsl-mutation-parity.test.js b/tests/rigor/dsl-mutation-parity.test.js
index 4101526..e936207 100644
--- a/tests/rigor/dsl-mutation-parity.test.js
+++ b/tests/rigor/dsl-mutation-parity.test.js
@@ -131,7 +131,7 @@ describe('DSL-compiled vs hand-written parity under mutation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('sequence-parity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'dsl-mutation-parity' });
+    ).run({ effort: 400, seed: 'dsl-mutation-parity' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'sequence-parity');
     assert.ok(inv);
@@ -181,7 +181,7 @@ describe('DSL-compiled vs hand-written parity under mutation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('grant-revoke-cycles', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 300, seed: 'dsl-grant-revoke-cycles' });
+    ).run({ effort: 300, seed: 'dsl-grant-revoke-cycles' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'grant-revoke-cycles');
     assert.ok(inv);
diff --git a/tests/rigor/graph-indices.test.js b/tests/rigor/graph-indices.test.js
index d3dc224..c23b804 100644
--- a/tests/rigor/graph-indices.test.js
+++ b/tests/rigor/graph-indices.test.js
@@ -182,7 +182,7 @@ describe('GraphIndices indexes (rigor)', () => {
       rigor.crucible([
         rigor.invariant('getDirectRelation-matches-oracle', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500, seed: 'graph-indices-direct-a' });
+    ).run({ effort: 1500, seed: 'graph-indices-direct-a' , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'getDirectRelation-matches-oracle');
@@ -245,7 +245,7 @@ describe('GraphIndices indexes (rigor)', () => {
       rigor.crucible([
         rigor.invariant('getRelationsFromSrc-matches-oracle', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500, seed: 'graph-indices-direct-b' });
+    ).run({ effort: 1500, seed: 'graph-indices-direct-b' , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'getRelationsFromSrc-matches-oracle');
@@ -305,7 +305,7 @@ describe('GraphIndices indexes (rigor)', () => {
       rigor.crucible([
         rigor.invariant('getRelationsToDst-matches-oracle', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500, seed: 'graph-indices-direct-c' });
+    ).run({ effort: 1500, seed: 'graph-indices-direct-c' , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'getRelationsToDst-matches-oracle');
@@ -365,7 +365,7 @@ describe('GraphIndices indexes (rigor)', () => {
       rigor.crucible([
         rigor.invariant('getRelationsByName-matches-oracle', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500, seed: 'graph-indices-direct-d' });
+    ).run({ effort: 1500, seed: 'graph-indices-direct-d' , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'getRelationsByName-matches-oracle');
@@ -421,7 +421,7 @@ describe('GraphIndices indexes (rigor)', () => {
       rigor.crucible([
         rigor.invariant('addRelation-tuple-idempotent', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800, seed: 'graph-indices-src' });
+    ).run({ effort: 800, seed: 'graph-indices-src' , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'addRelation-tuple-idempotent');
@@ -459,7 +459,7 @@ describe('GraphIndices indexes (rigor)', () => {
       rigor.crucible([
         rigor.invariant('addRelation-idempotent', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800, seed: 'graph-indices-dst' });
+    ).run({ effort: 800, seed: 'graph-indices-dst' , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'addRelation-idempotent');
@@ -502,7 +502,7 @@ describe('GraphIndices indexes (rigor)', () => {
       rigor.crucible([
         rigor.invariant('clear-empties-indexes', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800, seed: 'graph-indices-name' });
+    ).run({ effort: 800, seed: 'graph-indices-name' , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'clear-empties-indexes');
@@ -549,7 +549,7 @@ describe('GraphIndices indexes (rigor)', () => {
       rigor.crucible([
         rigor.invariant('add-remove-cycle', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800, seed: 'graph-indices-cycle' });
+    ).run({ effort: 800, seed: 'graph-indices-cycle' , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'add-remove-cycle');
diff --git a/tests/rigor/input-range-parity.test.js b/tests/rigor/input-range-parity.test.js
index 7d5d85d..04d3fd7 100644
--- a/tests/rigor/input-range-parity.test.js
+++ b/tests/rigor/input-range-parity.test.js
@@ -167,7 +167,7 @@ describe('Possibility write-boundary validation (rigor)', () => {
           return ctx.actual.engine >= 0 && ctx.actual.engine <= 1;
         })
       ])
-    ).run({ effort: 400, seed: 'input-range-contract' });
+    ).run({ effort: 400, seed: 'input-range-contract' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = result.crucibleVerdict;
     assert.equal(inv.passed, true, [
diff --git a/tests/rigor/logical-operators.test.js b/tests/rigor/logical-operators.test.js
index ded1a1e..3ea044f 100644
--- a/tests/rigor/logical-operators.test.js
+++ b/tests/rigor/logical-operators.test.js
@@ -65,7 +65,7 @@ describe('LogicalOperators evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('union-max', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'union-max');
@@ -104,7 +104,7 @@ describe('LogicalOperators evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('intersection-min', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'intersection-min');
@@ -138,7 +138,7 @@ describe('LogicalOperators evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('union-mean', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'union-mean');
@@ -181,7 +181,7 @@ describe('LogicalOperators evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('exclusion', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'exclusion');
@@ -214,7 +214,7 @@ describe('LogicalOperators evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('possibility-bounded', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'possibility-bounded');
@@ -251,7 +251,7 @@ describe('LogicalOperators evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('collected-values-concat', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'collected-values-concat');
diff --git a/tests/rigor/manager-index-parity.test.js b/tests/rigor/manager-index-parity.test.js
index 8a4deca..ea39f6c 100644
--- a/tests/rigor/manager-index-parity.test.js
+++ b/tests/rigor/manager-index-parity.test.js
@@ -165,7 +165,7 @@ describe('Manager vs index lookup parity (rigor)', () => {
       rigor.crucible([
         rigor.invariant('lookup-parity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1200, seed: 'manager-index-parity' });
+    ).run({ effort: 1200, seed: 'manager-index-parity' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'lookup-parity');
     assert.ok(inv, 'invariant missing');
diff --git a/tests/rigor/multi-hop-rule.test.js b/tests/rigor/multi-hop-rule.test.js
index 15cfa98..a73e391 100644
--- a/tests/rigor/multi-hop-rule.test.js
+++ b/tests/rigor/multi-hop-rule.test.js
@@ -51,7 +51,7 @@ describe('MultiHopRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('missing-relation', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'missing-relation');
@@ -88,7 +88,7 @@ describe('MultiHopRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('possibility-bounded', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'possibility-bounded');
@@ -126,7 +126,7 @@ describe('MultiHopRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('single-path-strength', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'single-path-strength');
@@ -161,7 +161,7 @@ describe('MultiHopRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('no-path', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500 });
+    ).run({ effort: 500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'no-path');
@@ -208,7 +208,7 @@ describe('MultiHopRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('multi-hop-finds-path', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'multi-hop-finds-path');
diff --git a/tests/rigor/multi-object-independence.test.js b/tests/rigor/multi-object-independence.test.js
index 094df9c..56c752e 100644
--- a/tests/rigor/multi-object-independence.test.js
+++ b/tests/rigor/multi-object-independence.test.js
@@ -154,7 +154,7 @@ describe('Multi-object independence (rigor)', () => {
       rigor.crucible([
         rigor.invariant('multi-object-isolation', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1000, seed: 'multi-object-independence' });
+    ).run({ effort: 1000, seed: 'multi-object-independence' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'multi-object-isolation');
     assert.ok(inv, 'invariant missing');
diff --git a/tests/rigor/node-lifecycle.test.js b/tests/rigor/node-lifecycle.test.js
index cb8d924..88f6bca 100644
--- a/tests/rigor/node-lifecycle.test.js
+++ b/tests/rigor/node-lifecycle.test.js
@@ -201,7 +201,7 @@ describe('Node lifecycle semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('remove-cascade', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1000, seed: 'node-lifecycle-remove' });
+    ).run({ effort: 1000, seed: 'node-lifecycle-remove' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'remove-cascade');
     assert.ok(inv, 'invariant missing');
@@ -254,7 +254,7 @@ describe('Node lifecycle semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('node-readd', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 600, seed: 'node-lifecycle-readd' });
+    ).run({ effort: 600, seed: 'node-lifecycle-readd' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'node-readd');
     assert.ok(inv, 'invariant missing');
diff --git a/tests/rigor/node-manager.test.js b/tests/rigor/node-manager.test.js
index 01d2243..db37882 100644
--- a/tests/rigor/node-manager.test.js
+++ b/tests/rigor/node-manager.test.js
@@ -93,7 +93,7 @@ describe('NodeManager index invariants (rigor)', () => {
       rigor.crucible([
         rigor.invariant('inverse-maps', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'inverse-maps');
@@ -133,7 +133,7 @@ describe('NodeManager index invariants (rigor)', () => {
       rigor.crucible([
         rigor.invariant('addNode-idempotent', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'addNode-idempotent');
@@ -186,7 +186,7 @@ describe('NodeManager index invariants (rigor)', () => {
       rigor.crucible([
         rigor.invariant('size-invariant', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'size-invariant');
@@ -249,7 +249,7 @@ describe('NodeManager index invariants (rigor)', () => {
       rigor.crucible([
         rigor.invariant('monotonic-ids', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'monotonic-ids');
@@ -295,7 +295,7 @@ describe('NodeManager index invariants (rigor)', () => {
       rigor.crucible([
         rigor.invariant('removeNode-cleanup', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'removeNode-cleanup');
@@ -335,7 +335,7 @@ describe('NodeManager index invariants (rigor)', () => {
       rigor.crucible([
         rigor.invariant('clearNodes-resets', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500 });
+    ).run({ effort: 500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'clearNodes-resets');
@@ -388,7 +388,7 @@ describe('NodeManager index invariants (rigor)', () => {
       rigor.crucible([
         rigor.invariant('updateNodeData-merges', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'updateNodeData-merges');
diff --git a/tests/rigor/overlay-precedence.test.js b/tests/rigor/overlay-precedence.test.js
index 9516f57..bcdd170 100644
--- a/tests/rigor/overlay-precedence.test.js
+++ b/tests/rigor/overlay-precedence.test.js
@@ -88,7 +88,7 @@ describe('Partial graph overlay precedence (rigor)', () => {
       rigor.crucible([
         rigor.invariant('persistent-precedence', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500, seed: 'overlay-persistent-precedence' });
+    ).run({ effort: 500, seed: 'overlay-persistent-precedence' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'persistent-precedence');
     assert.ok(inv);
@@ -138,7 +138,7 @@ describe('Partial graph overlay precedence (rigor)', () => {
       rigor.crucible([
         rigor.invariant('layer-precedence', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'overlay-layer-precedence' });
+    ).run({ effort: 400, seed: 'overlay-layer-precedence' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'layer-precedence');
     assert.ok(inv);
diff --git a/tests/rigor/parent-rule.test.js b/tests/rigor/parent-rule.test.js
index 62d53d9..2ec8477 100644
--- a/tests/rigor/parent-rule.test.js
+++ b/tests/rigor/parent-rule.test.js
@@ -87,7 +87,7 @@ describe('ParentRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('no-parents', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500 });
+    ).run({ effort: 500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'no-parents');
@@ -131,7 +131,7 @@ describe('ParentRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('one-parent-strength', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'one-parent-strength');
@@ -175,7 +175,7 @@ describe('ParentRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('threshold-cutoff', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'threshold-cutoff');
@@ -212,7 +212,7 @@ describe('ParentRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('cycle-detection', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 200 });
+    ).run({ effort: 200 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'cycle-detection');
@@ -258,7 +258,7 @@ describe('ParentRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('multi-parent-max', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'multi-parent-max');
@@ -297,7 +297,7 @@ describe('ParentRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('parent-relation-default', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 200 });
+    ).run({ effort: 200 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'parent-relation-default');
@@ -341,7 +341,7 @@ describe('ParentRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('possibility-bounded', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'possibility-bounded');
diff --git a/tests/rigor/partial-graph-parity.test.js b/tests/rigor/partial-graph-parity.test.js
index 0d587ab..ca3eb60 100644
--- a/tests/rigor/partial-graph-parity.test.js
+++ b/tests/rigor/partial-graph-parity.test.js
@@ -337,7 +337,7 @@ describe('Partial-graph overlay semantics (rigor)', () => {
         }),
         rigor.invariant('no action errors', (ctx) => ctx.error === null)
       ])
-    ).run({ effort: 500, seed: 'partial-graph-parity', maxTraceLength: 30 });
+    ).run({ effort: 500, seed: 'partial-graph-parity', maxTraceLength: 30 , artifacts: { dir: '', persist: 'never' }});
 
     const inv = result.crucibleVerdict;
     assert.equal(inv.passed, true, [
diff --git a/tests/rigor/pltc-reachability-parity.test.js b/tests/rigor/pltc-reachability-parity.test.js
index 116ff28..29349bf 100644
--- a/tests/rigor/pltc-reachability-parity.test.js
+++ b/tests/rigor/pltc-reachability-parity.test.js
@@ -128,7 +128,7 @@ describe('PLTC reachability parity (rigor)', () => {
       rigor.crucible([
         rigor.invariant('pltc-active-bypass-parity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500, seed: 'pltc-parity-active-bypass' });
+    ).run({ effort: 1500, seed: 'pltc-parity-active-bypass' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'pltc-active-bypass-parity');
     assert.ok(inv, 'invariant missing');
@@ -164,7 +164,7 @@ describe('PLTC reachability parity (rigor)', () => {
       rigor.crucible([
         rigor.invariant('pltc-fastfail-soundness', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1000, seed: 'pltc-parity-fastfail' });
+    ).run({ effort: 1000, seed: 'pltc-parity-fastfail' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'pltc-fastfail-soundness');
     assert.ok(inv, 'invariant missing');
diff --git a/tests/rigor/protocol-snapshot-lifecycle.test.js b/tests/rigor/protocol-snapshot-lifecycle.test.js
index c7cb2bf..18e0c3a 100644
--- a/tests/rigor/protocol-snapshot-lifecycle.test.js
+++ b/tests/rigor/protocol-snapshot-lifecycle.test.js
@@ -218,7 +218,7 @@ const result = await rigor.campaign(
       return true;
     })
   ])
-).run({ effort: 400, seed: 'snapshot-lifecycle-protocol', maxTraceLength: 24 });
+).run({ effort: 400, seed: 'snapshot-lifecycle-protocol', maxTraceLength: 24 , artifacts: { dir: '', persist: 'never' }});
 
 describe('Snapshot lifecycle protocol (rigor gated invariants)', () => {
   it('every random lifecycle sequence honors the protocol', () => {
diff --git a/tests/rigor/qualitative-rule-helpers.test.js b/tests/rigor/qualitative-rule-helpers.test.js
index 9827ed8..d42e3ec 100644
--- a/tests/rigor/qualitative-rule-helpers.test.js
+++ b/tests/rigor/qualitative-rule-helpers.test.js
@@ -94,7 +94,7 @@ describe('QualitativeRelationalComparatorRule._getQualitativeScale (rigor)', ()
       rigor.crucible([
         rigor.invariant('known-scales', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500 });
+    ).run({ effort: 500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'known-scales');
@@ -125,7 +125,7 @@ describe('QualitativeRelationalComparatorRule._getQualitativeScale (rigor)', ()
       rigor.crucible([
         rigor.invariant('fallback', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'fallback');
@@ -162,7 +162,7 @@ describe('QualitativeRelationalComparatorRule._calculateDecayedPossibility (rigo
       rigor.crucible([
         rigor.invariant('stable-identity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'stable-identity');
@@ -197,7 +197,7 @@ describe('QualitativeRelationalComparatorRule._calculateDecayedPossibility (rigo
       rigor.crucible([
         rigor.invariant('zero-periods', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'zero-periods');
@@ -238,7 +238,7 @@ describe('QualitativeRelationalComparatorRule._calculateDecayedPossibility (rigo
       rigor.crucible([
         rigor.invariant('down-monotone', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'down-monotone');
@@ -278,7 +278,7 @@ describe('QualitativeRelationalComparatorRule._calculateDecayedPossibility (rigo
       rigor.crucible([
         rigor.invariant('up-monotone', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'up-monotone');
@@ -314,7 +314,7 @@ describe('QualitativeRelationalComparatorRule._calculateDecayedPossibility (rigo
       rigor.crucible([
         rigor.invariant('result-in-scale', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'result-in-scale');
@@ -351,7 +351,7 @@ describe('QualitativeRelationalComparatorRule._createQualitativeInterval (rigor)
       rigor.crucible([
         rigor.invariant('lower-le-upper', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'lower-le-upper');
@@ -389,7 +389,7 @@ describe('QualitativeRelationalComparatorRule._createQualitativeInterval (rigor)
       rigor.crucible([
         rigor.invariant('point-contained', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'point-contained');
@@ -425,7 +425,7 @@ describe('QualitativeRelationalComparatorRule._createQualitativeInterval (rigor)
       rigor.crucible([
         rigor.invariant('bounds-in-scale', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'bounds-in-scale');
@@ -459,7 +459,7 @@ describe('QualitativeRelationalComparatorRule._createQualitativeInterval (rigor)
       rigor.crucible([
         rigor.invariant('zero-blur', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'zero-blur');
@@ -490,7 +490,7 @@ describe('QualitativeRelationalComparatorRule._calculatePossibilityLossSteps (ri
       rigor.crucible([
         rigor.invariant('loss-is-zero', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'loss-is-zero');
@@ -529,7 +529,7 @@ describe('QualitativeRelationalComparatorRule._calculatePossibilityLossSteps (ri
       rigor.crucible([
         rigor.invariant('loss-symmetric', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'loss-symmetric');
diff --git a/tests/rigor/relation-manager.test.js b/tests/rigor/relation-manager.test.js
index 63ff479..6e1b916 100644
--- a/tests/rigor/relation-manager.test.js
+++ b/tests/rigor/relation-manager.test.js
@@ -74,7 +74,7 @@ describe('RelationManager.addRelation/removeRelation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('add-and-get', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'add-and-get');
@@ -127,7 +127,7 @@ describe('RelationManager.addRelation/removeRelation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('addRelation-idempotent', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'addRelation-idempotent');
@@ -195,7 +195,7 @@ describe('RelationManager.addRelation/removeRelation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('remove-clears-indexes', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'remove-clears-indexes');
@@ -284,7 +284,7 @@ describe('RelationManager.addRelation/removeRelation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('index-coherence', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'index-coherence');
@@ -364,7 +364,7 @@ describe('RelationManager.addRelation/removeRelation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('add-remove-roundtrip', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'add-remove-roundtrip');
@@ -396,7 +396,7 @@ describe('RelationManager.addRelation/removeRelation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('getDirectRelation-unknown', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500 });
+    ).run({ effort: 500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'getDirectRelation-unknown');
diff --git a/tests/rigor/relational-comparator-router.test.js b/tests/rigor/relational-comparator-router.test.js
index 41fe198..76a5878 100644
--- a/tests/rigor/relational-comparator-router.test.js
+++ b/tests/rigor/relational-comparator-router.test.js
@@ -76,7 +76,7 @@ describe('RelationalComparatorRouter._isQualitativeRule (rigor)', () => {
       rigor.crucible([
         rigor.invariant('qualitative-wins', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'qualitative-wins');
@@ -116,7 +116,7 @@ describe('RelationalComparatorRouter._isQualitativeRule (rigor)', () => {
       rigor.crucible([
         rigor.invariant('scaleName-triggers', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500 });
+    ).run({ effort: 500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'scaleName-triggers');
@@ -156,7 +156,7 @@ describe('RelationalComparatorRouter._isQualitativeRule (rigor)', () => {
       rigor.crucible([
         rigor.invariant('decay-blur-triggers', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500 });
+    ).run({ effort: 500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'decay-blur-triggers');
@@ -190,7 +190,7 @@ describe('RelationalComparatorRouter._isQualitativeRule (rigor)', () => {
       rigor.crucible([
         rigor.invariant('marginSteps-correct', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'marginSteps-correct');
@@ -231,7 +231,7 @@ describe('RelationalComparatorRouter._isQualitativeRule (rigor)', () => {
       rigor.crucible([
         rigor.invariant('plain-numeric', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'plain-numeric');
@@ -276,7 +276,7 @@ describe('RelationalComparatorRouter._isQualitativeRule (rigor)', () => {
       rigor.crucible([
         rigor.invariant('getImplType-consistent', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'getImplType-consistent');
@@ -322,7 +322,7 @@ describe('RelationalComparatorRouter._isQualitativeRule (rigor)', () => {
       rigor.crucible([
         rigor.invariant('hasValidProperty', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1000 });
+    ).run({ effort: 1000 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'hasValidProperty');
diff --git a/tests/rigor/relational-comparator-rule.test.js b/tests/rigor/relational-comparator-rule.test.js
index de4ac8c..5ab0c9c 100644
--- a/tests/rigor/relational-comparator-rule.test.js
+++ b/tests/rigor/relational-comparator-rule.test.js
@@ -72,7 +72,7 @@ describe('RelationalComparatorRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('left-gt-right', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'left-gt-right');
@@ -111,7 +111,7 @@ describe('RelationalComparatorRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('left-lt-right', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'left-lt-right');
@@ -146,7 +146,7 @@ describe('RelationalComparatorRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('possibility-bounded', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'possibility-bounded');
@@ -181,7 +181,7 @@ describe('RelationalComparatorRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('result-shape-stable', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'result-shape-stable');
@@ -220,7 +220,7 @@ describe('RelationalComparatorRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('determinism', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'determinism');
diff --git a/tests/rigor/rule-kind-partial-parity.test.js b/tests/rigor/rule-kind-partial-parity.test.js
index c067c29..08c5f41 100644
--- a/tests/rigor/rule-kind-partial-parity.test.js
+++ b/tests/rigor/rule-kind-partial-parity.test.js
@@ -489,6 +489,64 @@ describe('Rule-kind × partial-graph parity (rigor)', () => {
       const unchanged = a.relationManager.getDirectRelation(a.resolveNodeId('u:0'), 'balance', a.resolveNodeId('doc:0'));
       assert.equal(unchanged.changed_last_at, 5000, 'value-unchanged modify keeps old timestamp (override not a refresh)');
     }
+    // ---- reliability propagation across kinds ----
+    {
+      // chain: product of edge reliabilities (0.9 * 0.8)
+      const a = mkArbiter();
+      a.setRelationConfig('can_access', { type: 'chain', steps: [{ relation: 'member_of', direction: 'out' }, { relation: 'reads', direction: 'out' }] });
+      a.addRelation('u:0', 'member_of', 'g:0', { possibility: 0.8, reliability: 0.9 });
+      a.addRelation('g:0', 'reads', 'doc:0', { possibility: 0.7, reliability: 0.8 });
+      const c = a.check('u:0', 'can_access', 'doc:0');
+      assert.ok(Math.abs(c.reliability - 0.72) < 0.01, `chain reliability product, got ${c.reliability}`);
+      // multi_hop: product along the path
+      a.setRelationConfig('can_hop', { type: 'multi_hop', relation: 'member_of', maxDepth: 3 });
+      a.addNode('g:1', 'group');
+      a.addRelation('u:0', 'member_of', 'g:0', { possibility: 0.8, reliability: 0.9 });
+      a.addRelation('g:0', 'member_of', 'g:1', { possibility: 0.7, reliability: 0.8 });
+      const m = a.check('u:0', 'can_hop', 'g:1');
+      assert.ok(Math.abs(m.reliability - 0.72) < 0.01, `multi_hop reliability product, got ${m.reliability}`);
+      // union: the max child's reliability (editor 0.9 / reli 0.5)
+      a.setRelationConfig('can_union', { union: { rules: [{ relation: 'owner' }, { relation: 'editor' }] } });
+      a.addRelation('u:0', 'owner', 'doc:0', { possibility: 0.8, reliability: 0.9 });
+      a.addRelation('u:0', 'editor', 'doc:0', { possibility: 0.9, reliability: 0.5 });
+      const u = a.check('u:0', 'can_union', 'doc:0');
+      assert.equal(round4(u.reliability), 0.5, `union selected-child reliability, got ${u.reliability}`);
+      // intersection: the min child's reliability (verified 0.6)
+      a.setRelationConfig('can_intersect', { intersection: { rules: [{ relation: 'owner' }, { relation: 'verified' }] } });
+      a.addRelation('u:0', 'verified', 'doc:0', { possibility: 0.5, reliability: 0.6 });
+      const i = a.check('u:0', 'can_intersect', 'doc:0');
+      assert.equal(round4(i.reliability), 0.6, `intersection selected-child reliability, got ${i.reliability}`);
+      // exclusion: product of both legs (0.9 * 0.7)
+      a.setRelationConfig('can_excl', { exclusion: [{ relation: 'owner' }, { relation: 'banned' }] });
+      a.addRelation('u:0', 'banned', 'doc:0', { possibility: 0.5, reliability: 0.7 });
+      const e = a.check('u:0', 'can_excl', 'doc:0');
+      assert.ok(Math.abs(e.reliability - 0.63) < 0.01, `exclusion product reliability, got ${e.reliability}`);
+      // defeasible: when reli * unless reli (0.9 * 0.7)
+      a.setRelationConfig('can_def', { type: 'defeasible', when: { relation: 'owner' }, unless: { relation: 'banned' } });
+      const d = a.check('u:0', 'can_def', 'doc:0');
+      assert.ok(Math.abs(d.reliability - 0.63) < 0.01, `defeasible combined reliability, got ${d.reliability}`);
+    }
+    // ---- multi_hop value collection through partial (no crash, values flow) ----
+    {
+      const a = mkArbiter();
+      a.addNode('g:1', 'group');
+      a.setRelationConfig('can_access', { type: 'multi_hop', relation: 'member_of', maxDepth: 3 });
+      a.addRelation('u:0', 'member_of', 'g:0', { possibility: 0.8 });
+      a.addRelation('g:0', 'member_of', 'g:1', { possibility: 0.7, value: 42 });
+      const p = a.check('u:0', 'can_access', 'g:1', { collectValues: true });
+      assert.ok(Array.isArray(p.collectedValues) && p.collectedValues.length > 0, 'multi_hop persistent values collected');
+      assert.ok(typeof p.collectedValues[0].value?.min === 'number', 'multi_hop value interval present');
+      a.removeRelation('u:0', 'member_of', 'g:0');
+      a.removeRelation('g:0', 'member_of', 'g:1');
+      const r = a.check('u:0', 'can_access', 'g:1', {
+        collectValues: true,
+        partialGraph: { relations: [
+          { src: 'u:0', relation: 'member_of', dst: 'g:0', possibility: 0.8 },
+          { src: 'g:0', relation: 'member_of', dst: 'g:1', possibility: 0.7, value: 42 }
+        ] }
+      });
+      assert.ok(Array.isArray(r.collectedValues) && r.collectedValues.length > 0, 'multi_hop partial values collected');
+    }
     // ---- binary mode agrees with normal at the same threshold ----
     {
       const a = mkArbiter();
diff --git a/tests/rigor/smoke.test.js b/tests/rigor/smoke.test.js
index 19824cf..c7a9127 100644
--- a/tests/rigor/smoke.test.js
+++ b/tests/rigor/smoke.test.js
@@ -28,7 +28,7 @@ describe('js-rigor smoke', () => {
         rigor.invariant('non-negative', ({ actual }) => actual >= 0),
         rigor.invariant('idempotent', ({ actual, fn }) => fn(actual) === actual)
       ])
-    ).run({ effort: 200 });
+    ).run({ effort: 200 , artifacts: { dir: '', persist: 'never' }});
 
     assert.ok(report, 'campaign returns a report');
     assert.equal(typeof report.toTAP, 'function', 'report has toTAP()');
@@ -46,7 +46,7 @@ describe('js-rigor smoke', () => {
       rigor.crucible([
         rigor.invariant('equals-one', ({ actual }) => actual === 1)
       ])
-    ).run({ effort: 50 });
+    ).run({ effort: 50 , artifacts: { dir: '', persist: 'never' }});
 
     // Report shape varies — log it for debugging.
     if (process.env.TEST_DEBUG === '1') {
diff --git a/tests/rigor/snapshot-parity.test.js b/tests/rigor/snapshot-parity.test.js
index 179fe28..1905b29 100644
--- a/tests/rigor/snapshot-parity.test.js
+++ b/tests/rigor/snapshot-parity.test.js
@@ -125,7 +125,7 @@ describe('Condensed snapshot round trip (rigor)', () => {
       rigor.crucible([
         rigor.invariant('snapshot-parity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'snapshot-parity' });
+    ).run({ effort: 400, seed: 'snapshot-parity' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'snapshot-parity');
     assert.ok(inv);
@@ -177,7 +177,7 @@ describe('Condensed snapshot round trip (rigor)', () => {
       rigor.crucible([
         rigor.invariant('readonly-enforced', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 300, seed: 'snapshot-readonly' });
+    ).run({ effort: 300, seed: 'snapshot-readonly' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'readonly-enforced');
     assert.ok(inv);
diff --git a/tests/rigor/snapshot-quantization-parity.test.js b/tests/rigor/snapshot-quantization-parity.test.js
index d0ec441..d6b9231 100644
--- a/tests/rigor/snapshot-quantization-parity.test.js
+++ b/tests/rigor/snapshot-quantization-parity.test.js
@@ -155,7 +155,7 @@ describe('Condensed snapshot quantization parity (rigor)', () => {
           return after1.every((v, i) => Math.abs(v - after2[i]) <= TOL);
         })
       ])
-    ).run({ effort: 300, seed: 'snapshot-quantization-parity' });
+    ).run({ effort: 300, seed: 'snapshot-quantization-parity' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = result.crucibleVerdict;
     assert.equal(inv.passed, true, [
diff --git a/tests/rigor/traversal-parity.test.js b/tests/rigor/traversal-parity.test.js
index 65c6e02..0a5403b 100644
--- a/tests/rigor/traversal-parity.test.js
+++ b/tests/rigor/traversal-parity.test.js
@@ -188,7 +188,7 @@ describe('Traversal semantics parity (rigor)', () => {
       rigor.crucible([
         rigor.invariant('chain-direction-parity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500, seed: 'traversal-chain-direction' });
+    ).run({ effort: 1500, seed: 'traversal-chain-direction' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'chain-direction-parity');
     assert.ok(inv, 'invariant missing');
@@ -264,7 +264,7 @@ describe('Traversal semantics parity (rigor)', () => {
       rigor.crucible([
         rigor.invariant('ttu-multi-tuple-parity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1200, seed: 'traversal-ttu-multituple' });
+    ).run({ effort: 1200, seed: 'traversal-ttu-multituple' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'ttu-multi-tuple-parity');
     assert.ok(inv, 'invariant missing');
@@ -340,7 +340,7 @@ describe('Traversal semantics parity (rigor)', () => {
       rigor.crucible([
         rigor.invariant('update-path-parity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 600, seed: 'traversal-update-path' });
+    ).run({ effort: 600, seed: 'traversal-update-path' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'update-path-parity');
     assert.ok(inv, 'invariant missing');
diff --git a/tests/rigor/ttl-expiry-parity.test.js b/tests/rigor/ttl-expiry-parity.test.js
index cf80904..aa69e55 100644
--- a/tests/rigor/ttl-expiry-parity.test.js
+++ b/tests/rigor/ttl-expiry-parity.test.js
@@ -144,7 +144,7 @@ describe('Value TTL expiry through the comparator path (rigor)', () => {
         }),
         rigor.invariant('no action errors', (ctx) => ctx.error === null)
       ])
-    ).run({ effort: 400, seed: 'ttl-expiry-parity', maxTraceLength: 30 });
+    ).run({ effort: 400, seed: 'ttl-expiry-parity', maxTraceLength: 30 , artifacts: { dir: '', persist: 'never' }});
 
     const inv = result.crucibleVerdict;
     assert.equal(inv.passed, true, [
diff --git a/tests/rigor/tuple-to-userset-rule.test.js b/tests/rigor/tuple-to-userset-rule.test.js
index 3fc8349..ec56e61 100644
--- a/tests/rigor/tuple-to-userset-rule.test.js
+++ b/tests/rigor/tuple-to-userset-rule.test.js
@@ -92,7 +92,7 @@ describe('TupleToUsersetRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('no-tuples', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500 });
+    ).run({ effort: 500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'no-tuples');
@@ -141,7 +141,7 @@ describe('TupleToUsersetRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('min-fusion', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'min-fusion');
@@ -194,7 +194,7 @@ describe('TupleToUsersetRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('multi-tuple-max', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 1500 });
+    ).run({ effort: 1500 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'multi-tuple-max');
@@ -232,7 +232,7 @@ describe('TupleToUsersetRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('possibility-bounded', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 });
+    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'possibility-bounded');
@@ -292,7 +292,7 @@ describe('TupleToUsersetRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('early-exit', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 200 });
+    ).run({ effort: 200 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'early-exit');
@@ -342,7 +342,7 @@ describe('TupleToUsersetRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('cycle-detection', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 200 });
+    ).run({ effort: 200 , artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'cycle-detection');
diff --git a/tests/rigor/tx-rollback-parity.test.js b/tests/rigor/tx-rollback-parity.test.js
index 9bc4943..28c3472 100644
--- a/tests/rigor/tx-rollback-parity.test.js
+++ b/tests/rigor/tx-rollback-parity.test.js
@@ -175,7 +175,7 @@ describe('Transactional batch atomicity and batch+PLTC (rigor)', () => {
         }),
         rigor.invariant('no action errors', (ctx) => ctx.error === null)
       ])
-    ).run({ effort: 400, seed: 'tx-rollback-parity', maxTraceLength: 25 });
+    ).run({ effort: 400, seed: 'tx-rollback-parity', maxTraceLength: 25 , artifacts: { dir: '', persist: 'never' }});
 
     const inv = result.crucibleVerdict;
     assert.equal(inv.passed, true, [
diff --git a/tests/rigor/value-freshness-parity.test.js b/tests/rigor/value-freshness-parity.test.js
index ffc7d4c..8828271 100644
--- a/tests/rigor/value-freshness-parity.test.js
+++ b/tests/rigor/value-freshness-parity.test.js
@@ -190,7 +190,7 @@ describe('Value-layer and batch-path freshness (rigor)', () => {
           return typeof actual.success === 'boolean';
         })
       ])
-    ).run({ effort: 400, seed: 'value-freshness-parity', maxTraceLength: 30 });
+    ).run({ effort: 400, seed: 'value-freshness-parity', maxTraceLength: 30 , artifacts: { dir: '', persist: 'never' }});
 
     const inv = result.crucibleVerdict;
     assert.equal(inv.passed, true, [
diff --git a/tests/rigor/zanzibar-consistency.test.js b/tests/rigor/zanzibar-consistency.test.js
index 3f56a5d..e25023b 100644
--- a/tests/rigor/zanzibar-consistency.test.js
+++ b/tests/rigor/zanzibar-consistency.test.js
@@ -93,7 +93,7 @@ describe('Authorization state consistency (rigor)', () => {
       rigor.crucible([
         rigor.invariant('ttu-mutation', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'consistency-ttu-mutation' });
+    ).run({ effort: 400, seed: 'consistency-ttu-mutation' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'ttu-mutation');
     assert.ok(inv);
@@ -154,7 +154,7 @@ describe('Authorization state consistency (rigor)', () => {
       rigor.crucible([
         rigor.invariant('chain-mutation', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'consistency-chain-mutation' });
+    ).run({ effort: 400, seed: 'consistency-chain-mutation' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'chain-mutation');
     assert.ok(inv);
@@ -222,7 +222,7 @@ describe('Authorization state consistency (rigor)', () => {
       rigor.crucible([
         rigor.invariant('config-change', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'consistency-config-change' });
+    ).run({ effort: 400, seed: 'consistency-config-change' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'config-change');
     assert.ok(inv);
@@ -274,7 +274,7 @@ describe('Authorization state consistency (rigor)', () => {
       rigor.crucible([
         rigor.invariant('threshold-excludes', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'consistency-threshold' });
+    ).run({ effort: 400, seed: 'consistency-threshold' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'threshold-excludes');
     assert.ok(inv);
@@ -340,7 +340,7 @@ describe('Authorization state consistency (rigor)', () => {
       rigor.crucible([
         rigor.invariant('values-complete', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'consistency-value-completeness' });
+    ).run({ effort: 400, seed: 'consistency-value-completeness' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'values-complete');
     assert.ok(inv);
@@ -377,7 +377,7 @@ describe('Authorization state consistency (rigor)', () => {
       rigor.crucible([
         rigor.invariant('deterministic', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 300, seed: 'consistency-determinism' });
+    ).run({ effort: 300, seed: 'consistency-determinism' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'deterministic');
     assert.ok(inv);
diff --git a/tests/rigor/zanzibar-defeasible-dsl-comparator.test.js b/tests/rigor/zanzibar-defeasible-dsl-comparator.test.js
index 91fe8c8..dfc9fa8 100644
--- a/tests/rigor/zanzibar-defeasible-dsl-comparator.test.js
+++ b/tests/rigor/zanzibar-defeasible-dsl-comparator.test.js
@@ -100,7 +100,7 @@ describe('Defeasible logic, DSL parity, aggregation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('defeasible-semantics', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 600, seed: 'defeasible-semantics' });
+    ).run({ effort: 600, seed: 'defeasible-semantics' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'defeasible-semantics');
     assert.ok(inv);
@@ -174,7 +174,7 @@ describe('Defeasible logic, DSL parity, aggregation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('dsl-parity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'dsl-runtime-parity' });
+    ).run({ effort: 400, seed: 'dsl-runtime-parity' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'dsl-parity');
     assert.ok(inv);
@@ -265,7 +265,7 @@ describe('Defeasible logic, DSL parity, aggregation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('aggregation-complete', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500, seed: 'aggregation-completeness' });
+    ).run({ effort: 500, seed: 'aggregation-completeness' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'aggregation-complete');
     assert.ok(inv);
diff --git a/tests/rigor/zanzibar-semantics.test.js b/tests/rigor/zanzibar-semantics.test.js
index 8de00df..f7e2d34 100644
--- a/tests/rigor/zanzibar-semantics.test.js
+++ b/tests/rigor/zanzibar-semantics.test.js
@@ -312,7 +312,7 @@ describe('Zanzibar rewrite-rule semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('union-max', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'zanzibar-union' });
+    ).run({ effort: 400, seed: 'zanzibar-union' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'union-max');
     assert.ok(inv);
@@ -356,7 +356,7 @@ describe('Zanzibar rewrite-rule semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('intersection-min', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'zanzibar-intersection' });
+    ).run({ effort: 400, seed: 'zanzibar-intersection' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'intersection-min');
     assert.ok(inv);
@@ -399,7 +399,7 @@ describe('Zanzibar rewrite-rule semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('exclusion-blocks', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'zanzibar-exclusion' });
+    ).run({ effort: 400, seed: 'zanzibar-exclusion' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'exclusion-blocks');
     assert.ok(inv);
@@ -434,7 +434,7 @@ describe('Zanzibar rewrite-rule semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('expand-parity', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800, seed: 'zanzibar-expand-parity' });
+    ).run({ effort: 800, seed: 'zanzibar-expand-parity' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'expand-parity');
     assert.ok(inv);
@@ -490,7 +490,7 @@ describe('Zanzibar rewrite-rule semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('nested-weakest-link', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500, seed: 'zanzibar-nested-chain' });
+    ).run({ effort: 500, seed: 'zanzibar-nested-chain' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'nested-weakest-link');
     assert.ok(inv);
@@ -546,7 +546,7 @@ describe('Zanzibar rewrite-rule semantics (rigor)', () => {
       rigor.crucible([
         rigor.invariant('cycle-safe', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 400, seed: 'zanzibar-cycle-safety' });
+    ).run({ effort: 400, seed: 'zanzibar-cycle-safety' , artifacts: { dir: '', persist: 'never' }});
 
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'cycle-safe');
     assert.ok(inv);