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diff --git a/src/mongo/db/pipeline/document_source_list_local_sessions.h b/src/mongo/db/pipeline/document_source_list_local_sessions.h
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+++ b/src/mongo/db/pipeline/document_source_list_local_sessions.h
@@ -0,0 +1,118 @@
+/**
+ * Copyright (C) 2017 MongoDB Inc.
+ *
+ * This program is free software: you can redistribute it and/or  modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * As a special exception, the copyright holders give permission to link the
+ * code of portions of this program with the OpenSSL library under certain
+ * conditions as described in each individual source file and distribute
+ * linked combinations including the program with the OpenSSL library. You
+ * must comply with the GNU Affero General Public License in all respects
+ * for all of the code used other than as permitted herein. If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so. If you do not
+ * wish to do so, delete this exception statement from your version. If you
+ * delete this exception statement from all source files in the program,
+ * then also delete it in the license file.
+ */
+
+#pragma once
+
+#include <vector>
+
+#include "mongo/bson/bsonmisc.h"
+#include "mongo/bson/bsonobj.h"
+#include "mongo/crypto/sha256_block.h"
+#include "mongo/db/logical_session_cache.h"
+#include "mongo/db/pipeline/document_source.h"
+#include "mongo/db/pipeline/document_sources_gen.h"
+#include "mongo/db/pipeline/lite_parsed_document_source.h"
+
+namespace mongo {
+
+ListSessionsSpec listSessionsParseSpec(StringData stageName, const BSONElement& spec);
+PrivilegeVector listSessionsRequiredPrivileges(const ListSessionsSpec& spec);
+std::vector<SHA256Block> listSessionsUsersToDigests(const std::vector<ListSessionsUser>& users);
+
+/**
+ * Produces one document per session in the local cache if 'allUsers' is specified
+ * as true, and returns just sessions for the currently logged in user if
+ * 'allUsers' is specified as false, or not specified at all.
+ */
+class DocumentSourceListLocalSessions final : public DocumentSource {
+public:
+    static const char* kStageName;
+
+    class LiteParsed final : public LiteParsedDocumentSource {
+    public:
+        static std::unique_ptr<LiteParsed> parse(const AggregationRequest& request,
+                                                 const BSONElement& spec) {
+
+            return stdx::make_unique<LiteParsed>(listSessionsParseSpec(kStageName, spec));
+        }
+
+        explicit LiteParsed(const ListSessionsSpec& spec) : _spec(spec) {}
+
+        stdx::unordered_set<NamespaceString> getInvolvedNamespaces() const final {
+            return stdx::unordered_set<NamespaceString>();
+        }
+
+        PrivilegeVector requiredPrivileges(bool isMongos) const final {
+            return listSessionsRequiredPrivileges(_spec);
+        }
+
+        bool isInitialSource() const final {
+            return true;
+        }
+
+        bool allowedToForwardFromMongos() const final {
+            return false;
+        }
+
+    private:
+        const ListSessionsSpec _spec;
+    };
+
+    GetNextResult getNext() final;
+
+    const char* getSourceName() const final {
+        return kStageName;
+    }
+
+    Value serialize(boost::optional<ExplainOptions::Verbosity> explain = boost::none) const final {
+        return Value(Document{{getSourceName(), _spec.toBSON()}});
+    }
+
+    StageConstraints constraints() const final {
+        StageConstraints constraints;
+        constraints.requiredPosition = StageConstraints::PositionRequirement::kFirst;
+        constraints.hostRequirement = StageConstraints::HostTypeRequirement::kAnyShardOrMongoS;
+        constraints.requiresInputDocSource = false;
+        constraints.isAllowedInsideFacetStage = false;
+        constraints.isIndependentOfAnyCollection = true;
+        return constraints;
+    }
+
+    static boost::intrusive_ptr<DocumentSource> createFromBson(
+        BSONElement elem, const boost::intrusive_ptr<ExpressionContext>& pExpCtx);
+
+private:
+    DocumentSourceListLocalSessions(const boost::intrusive_ptr<ExpressionContext>& pExpCtx,
+                                    const ListSessionsSpec& spec);
+
+    const ListSessionsSpec _spec;
+    const LogicalSessionCache* _cache;
+    std::vector<LogicalSessionId> _ids;
+};
+
+}  // namespace mongo