From 8e8e1b0b7106f8aaceea8f939f344378c695e47e Mon Sep 17 00:00:00 2001
From: Rhys Howell <rhys.howell@mongodb.com>
Date: Fri, 13 Jun 2025 14:00:30 -0400
Subject: [PATCH 1/2] feat(mongodb-constants): add  stage for 8.1+ COMPASS-9429

---
 .../mongodb-constants/src/stage-operators.ts  | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/packages/mongodb-constants/src/stage-operators.ts b/packages/mongodb-constants/src/stage-operators.ts
index 0ba36836..abbbb401 100644
--- a/packages/mongodb-constants/src/stage-operators.ts
+++ b/packages/mongodb-constants/src/stage-operators.ts
@@ -749,6 +749,48 @@ const STAGE_OPERATORS = [
 `,
     snippet: `{
   \${1:specification(s)}
+}`,
+  },
+  {
+    name: '$rankFusion',
+    value: '$rankFusion',
+    label: '$rankFusion',
+    outputStage: false,
+    fullScan: false,
+    firstStage: false,
+    score: 1,
+    env: [ATLAS],
+    meta: 'stage',
+    version: '8.1.0',
+    apiVersions: [],
+    namespaces: [COLLECTION],
+    description:
+      'Combines multiple pipelines using reciprocal rank fusion to create hybrid search results.',
+    comment: `/**
+ * input.pipelines: Required. Map from name to input pipeline. Each pipeline must be a Ranked Selection Pipeline operating on the same collection. Minimum of one pipeline.
+ * combination.weights: Optional. Map from pipeline name to numbers (non-negative). If unspecified, default weight is 1 for each pipeline.
+ * scoreDetails: Optional. Default false. Set to true to include detailed scoring information in {$meta: "scoreDetails"} for debugging and tuning.
+ */
+`,
+    snippet: `{
+  input: {
+    pipelines: {
+      \${1:searchPipeline}: [
+        {$search: {\${2:searchStage}}},
+        {$limit: \${3:limit}}
+      ],
+      \${4:vectorPipeline}: [
+        {$vectorSearch: {\${5:vectorSearchStage}}}
+      ]
+    }
+  },
+  combination: {
+    weights: {
+      \${1:searchPipeline}: \${6:number},
+      \${4:vectorPipeline}: \${7:number}
+    }
+  },
+  scoreDetails: \${8:false}
 }`,
   },
   {

From 0b1472a6794d3896134de36eb8711e4fde78a3f8 Mon Sep 17 00:00:00 2001
From: Rhys Howell <rhys.howell@mongodb.com>
Date: Wed, 18 Jun 2025 14:10:55 -0400
Subject: [PATCH 2/2] fixup: snippet numbering

---
 packages/mongodb-constants/src/stage-operators.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/packages/mongodb-constants/src/stage-operators.ts b/packages/mongodb-constants/src/stage-operators.ts
index abbbb401..8f832910 100644
--- a/packages/mongodb-constants/src/stage-operators.ts
+++ b/packages/mongodb-constants/src/stage-operators.ts
@@ -786,11 +786,11 @@ const STAGE_OPERATORS = [
   },
   combination: {
     weights: {
-      \${1:searchPipeline}: \${6:number},
-      \${4:vectorPipeline}: \${7:number}
+      \${6:searchPipeline}: \${7:number},
+      \${8:vectorPipeline}: \${9:number}
     }
   },
-  scoreDetails: \${8:false}
+  scoreDetails: \${10:false}
 }`,
   },
   {