fix(runtime): preserve deterministic context identity

src/browser/V8InspectorCaptureProjection.ts

@@ -68,7 +68,11 @@ export const finalizeInspectorCapture = async ({
     scripts.set(script.script_key, script);
   }
   const items = [...scripts.values()].sort((left, right) =>
-    left.script_key.localeCompare(right.script_key),
+    left.script_key < right.script_key
+      ? -1
+      : left.script_key > right.script_key
+        ? 1
+        : 0,
   );
   const contexts = [...state.contexts.values()]
     .map((context) => ({
@@ -77,7 +81,13 @@ export const finalizeInspectorCapture = async ({
       name: null,
       origin: context.origin,
     }))
-    .sort((left, right) => left.context_key.localeCompare(right.context_key));
+    .sort((left, right) =>
+      left.context_key < right.context_key
+        ? -1
+        : left.context_key > right.context_key
+          ? 1
+          : 0,
+    );
   return {
     schema_version: 1,
     runtime,
@@ -132,6 +142,7 @@ const scriptFromDraft = (
 ): JavaScriptRuntimeObservation["scripts"]["items"][number] => {
   const stable = JSON.stringify({
     location,
+    execution_context_key: draft.executionContextKey,
     cdp_hash: draft.cdpHash,
     length: draft.length,
     is_module: draft.isModule,

src/browser/V8InspectorProvider.ts

@@ -110,7 +110,9 @@ export class V8InspectorProvider implements JavaScriptRuntimeObservationPort {
         }
         allowed.push({ ...target, location: decision.location });
       }
-      allowed.sort((left, right) => left.id.localeCompare(right.id));
+      allowed.sort((left, right) =>
+        left.id < right.id ? -1 : left.id > right.id ? 1 : 0,
+      );
       const items = allowed
         .slice(input.offset, input.offset + input.limit)
         .map(projectTarget);

src/domain/browserScenarioNormalization.ts

@@ -26,7 +26,9 @@ export const commitBrowserScenarioNormalization = (
       ...rule,
       artifacts: [...rule.artifacts].sort(),
     }))
-    .sort((left, right) => left.rule_id.localeCompare(right.rule_id));
+    .sort((left, right) =>
+      left.rule_id < right.rule_id ? -1 : left.rule_id > right.rule_id ? 1 : 0,
+    );
   const commitment = { built_in_rules: [...BUILT_IN_RULES], rules };
   return { ...commitment, sha256: digestCanonicalJson(commitment) };
 };

src/domain/reconstructionReadinessFindingHelpers.ts

@@ -40,7 +40,8 @@ export const readinessFinding = (
 export const readinessFindingOrder = (
   left: ReadinessFinding,
   right: ReadinessFinding,
-): number =>
-  `${left.stage_id}:${left.code}:${left.detail}`.localeCompare(
-    `${right.stage_id}:${right.code}:${right.detail}`,
-  );
+): number => {
+  const leftKey = `${left.stage_id}:${left.code}:${left.detail}`;
+  const rightKey = `${right.stage_id}:${right.code}:${right.detail}`;
+  return leftKey < rightKey ? -1 : leftKey > rightKey ? 1 : 0;
+};