From 2fe058c9cc1c0e4f1e5e81a476e475ee6f9124a1 Mon Sep 17 00:00:00 2001
From: Max Hodak <maxh@science.xyz>
Date: Sun, 11 Jan 2026 13:32:44 -0800
Subject: [PATCH] Add ListApps RPC for querying installed applications

- Add AppInfo message with name and version fields
- Add ListAppsRequest and ListAppsResponse messages
- Add ListApps RPC to SynapseDevice service

This enables clients to query the list of installed applications
on a device, complementing the existing DeployApp RPC.
---
 api/app.proto     | 16 ++++++++++++++++
 api/synapse.proto |  1 +
 2 files changed, 17 insertions(+)

diff --git a/api/app.proto b/api/app.proto
index 1b26b90..7201fb8 100644
--- a/api/app.proto
+++ b/api/app.proto
@@ -53,3 +53,19 @@ message AppPerformanceSummary {
   uint64 timestamp_ns = 1;
   repeated FunctionProfile function_profiles = 2;
 }
+
+// Information about an installed application
+message AppInfo {
+  // Application name (e.g., "synapse-example-app")
+  string name = 1;
+
+  // Installed version
+  string version = 2;
+}
+
+message ListAppsRequest {
+}
+
+message ListAppsResponse {
+  repeated AppInfo apps = 1;
+}
diff --git a/api/synapse.proto b/api/synapse.proto
index 135236c..bb5527a 100644
--- a/api/synapse.proto
+++ b/api/synapse.proto
@@ -20,6 +20,7 @@ service SynapseDevice {
   rpc StreamQuery(StreamQueryRequest) returns (stream StreamQueryResponse) {}
 
   rpc DeployApp(stream AppPackageChunk) returns (stream AppDeployResponse) {}
+  rpc ListApps(ListAppsRequest) returns (ListAppsResponse) {}
 
   rpc ListFiles(google.protobuf.Empty) returns (ListFilesResponse) {}
   rpc WriteFile(WriteFileRequest) returns (WriteFileResponse) {}