forgot how weird this platform is

## Motivation

https://github.com/exo-explore/exo/issues/1075

## Changes

- Added in-app "Uninstall" option under Advanced menu that cleanly
removes all system components
- Added NetworkSetupHelper.uninstall() to remove LaunchDaemon, scripts,
logs, and restore network settings
- Added LaunchAtLoginHelper.disable() to unregister from login items
- Created standalone uninstall-exo.sh script for users who already
deleted the app
- Added uninstall documentation to README

<img width="386" height="577" alt="image"
src="https://github.com/user-attachments/assets/6bbcd18a-992a-409d-8791-ed5e13bbcfe0"
/>
<img width="372" height="432" alt="image"
src="https://github.com/user-attachments/assets/ee76b45d-c111-4807-ab28-3f2f20e01140"
/>


## Why It Works

The in-app uninstaller runs a privileged shell script (via AppleScript)
to launchctl bootout the daemon, remove files, and restore the
"Automatic" network location. The standalone script provides the same
cleanup for users who already deleted the app.

## Test Plan

### Manual Testing
Hardware: MacBook Pro
- Built and ran app, verified LaunchDaemon and network location were
created
- Used in-app Uninstall, verified all components removed and network
restored to Automatic
- Rebuilt app, quit normally, ran sudo ./uninstall-exo.sh, verified same
cleanup

### Automated Testing
N/A

---------

Co-authored-by: Evan <evanev7@gmail.com>

.gitignore

@@ -16,6 +16,7 @@ digest.txt
 *.xcuserdatad/
 **/.DS_Store
 app/EXO/build/
+dist/
 
 
 # rust

README.md

@@ -166,6 +166,24 @@ Download the latest build here: [EXO-latest.dmg](https://assets.exolabs.net/EXO-
 
 The app will ask for permission to modify system settings and install a new Network profile. Improvements to this are being worked on.
 
+#### Uninstalling the macOS App
+
+The recommended way to uninstall is through the app itself: click the menu bar icon → Advanced → Uninstall. This cleanly removes all system components.
+
+If you've already deleted the app, you can run the standalone uninstaller script:
+
+```bash
+sudo ./app/EXO/uninstall-exo.sh
+```
+
+This removes:
+- Network setup LaunchDaemon
+- Network configuration script
+- Log files
+- The "exo" network location
+
+**Note:** You'll need to manually remove EXO from Login Items in System Settings → General → Login Items.
+
 ---
 
 ### Enabling RDMA on macOS

TODO.md

@@ -19,6 +19,7 @@
 25. Rethink retry logic
 26. Task cancellation. When API http request gets cancelled, it should cancel corresponding task.
 27. Log cleanup - per-module log filters and default to DEBUG log levels
+28. Validate RDMA connections with ibv_devinfo in the info gatherer
 
 Potential refactors:
 

app/EXO/EXO/ContentView.swift

@@ -18,10 +18,11 @@ struct ContentView: View {
     @State private var deletingInstanceIDs: Set<String> = []
     @State private var showAllNodes = false
     @State private var showAllInstances = false
+    @State private var showAdvanced = false
     @State private var showDebugInfo = false
     @State private var bugReportInFlight = false
     @State private var bugReportMessage: String?
-    @State private var showAdvancedOptions = false
+    @State private var uninstallInProgress = false
     @State private var pendingNamespace: String = ""
 
     var body: some View {
@@ -255,13 +256,7 @@ struct ContentView: View {
                 Divider()
                     .padding(.vertical, 4)
             }
-            controlButton(title: "Check for Updates") {
-                updater.checkForUpdates()
-            }
-            .padding(.bottom, 8)
-            advancedOptionsSection
-                .padding(.bottom, 8)
-            debugSection
+            advancedSection
                 .padding(.bottom, 8)
             controlButton(title: "Quit", tint: .secondary) {
                 controller.stop()
@@ -270,6 +265,54 @@ struct ContentView: View {
         }
     }
 
+    private var advancedSection: some View {
+        VStack(alignment: .leading, spacing: 6) {
+            HStack {
+                Text("Advanced")
+                    .font(.caption)
+                    .foregroundColor(.secondary)
+                Spacer()
+                collapseButton(isExpanded: $showAdvanced)
+            }
+            .animation(nil, value: showAdvanced)
+            if showAdvanced {
+                VStack(alignment: .leading, spacing: 8) {
+                    VStack(alignment: .leading, spacing: 4) {
+                        Text("Cluster Namespace")
+                            .font(.caption2)
+                            .foregroundColor(.secondary)
+                        HStack {
+                            TextField("optional", text: $pendingNamespace)
+                                .textFieldStyle(.roundedBorder)
+                                .font(.caption2)
+                                .onAppear {
+                                    pendingNamespace = controller.customNamespace
+                                }
+                            Button("Save & Restart") {
+                                controller.customNamespace = pendingNamespace
+                                if controller.status == .running || controller.status == .starting {
+                                    controller.restart()
+                                }
+                            }
+                            .font(.caption2)
+                            .disabled(pendingNamespace == controller.customNamespace)
+                        }
+                    }
+                    HoverButton(title: "Check for Updates", small: true) {
+                        updater.checkForUpdates()
+                    }
+                    debugSection
+                    HoverButton(title: "Uninstall", tint: .red, small: true) {
+                        showUninstallConfirmationAlert()
+                    }
+                    .disabled(uninstallInProgress)
+                }
+                .transition(.opacity)
+            }
+        }
+        .animation(.easeInOut(duration: 0.25), value: showAdvanced)
+    }
+
     private func controlButton(title: String, tint: Color = .primary, action: @escaping () -> Void)
         -> some View
     {
@@ -396,57 +439,16 @@ struct ContentView: View {
         }
     }
 
-    private var advancedOptionsSection: some View {
-        VStack(alignment: .leading, spacing: 6) {
-            HStack {
-                Text("Advanced Options")
-                    .font(.caption)
-                    .foregroundColor(.secondary)
-                Spacer()
-                collapseButton(isExpanded: $showAdvancedOptions)
-            }
-            .animation(nil, value: showAdvancedOptions)
-            if showAdvancedOptions {
-                VStack(alignment: .leading, spacing: 8) {
-                    VStack(alignment: .leading, spacing: 4) {
-                        Text("Cluster Namespace")
-                            .font(.caption2)
-                            .foregroundColor(.secondary)
-                        HStack {
-                            TextField("optional", text: $pendingNamespace)
-                                .textFieldStyle(.roundedBorder)
-                                .font(.caption2)
-                                .onAppear {
-                                    pendingNamespace = controller.customNamespace
-                                }
-                            Button("Save & Restart") {
-                                controller.customNamespace = pendingNamespace
-                                if controller.status == .running || controller.status == .starting {
-                                    controller.restart()
-                                }
-                            }
-                            .font(.caption2)
-                            .disabled(pendingNamespace == controller.customNamespace)
-                        }
-
-                    }
-                }
-                .transition(.opacity)
-            }
-        }
-        .animation(.easeInOut(duration: 0.25), value: showAdvancedOptions)
-    }
-
     private var debugSection: some View {
-        VStack(alignment: .leading, spacing: 6) {
-            HStack {
-                Text("Debug Info")
-                    .font(.caption)
-                    .foregroundColor(.secondary)
-                Spacer()
-                collapseButton(isExpanded: $showDebugInfo)
+        VStack(alignment: .leading, spacing: 4) {
+            HoverButton(
+                title: "Debug Info",
+                tint: .primary,
+                trailingSystemImage: showDebugInfo ? "chevron.up" : "chevron.down",
+                small: true
+            ) {
+                showDebugInfo.toggle()
             }
-            .animation(nil, value: showDebugInfo)
             if showDebugInfo {
                 VStack(alignment: .leading, spacing: 4) {
                     Text("Version: \(buildTag)")
@@ -463,6 +465,7 @@ struct ContentView: View {
                     sendBugReportButton
                         .padding(.top, 6)
                 }
+                .padding(.leading, 8)
                 .transition(.opacity)
             }
         }
@@ -604,6 +607,88 @@ struct ContentView: View {
         bugReportInFlight = false
     }
 
+    private func showUninstallConfirmationAlert() {
+        let alert = NSAlert()
+        alert.messageText = "Uninstall EXO"
+        alert.informativeText = """
+            This will remove EXO and all its system components:
+
+            • Network configuration daemon
+            • Launch at login registration
+            • EXO network location
+
+            The app will be moved to Trash.
+            """
+        alert.alertStyle = .warning
+        alert.addButton(withTitle: "Uninstall")
+        alert.addButton(withTitle: "Cancel")
+
+        // Style the Uninstall button as destructive
+        if let uninstallButton = alert.buttons.first {
+            uninstallButton.hasDestructiveAction = true
+        }
+
+        let response = alert.runModal()
+        if response == .alertFirstButtonReturn {
+            performUninstall()
+        }
+    }
+
+    private func performUninstall() {
+        uninstallInProgress = true
+
+        // Stop EXO process first
+        controller.cancelPendingLaunch()
+        controller.stop()
+        stateService.stopPolling()
+
+        // Run the privileged uninstall on a background thread
+        // Using .utility QoS to avoid priority inversion with NSAppleScript's subprocess
+        DispatchQueue.global(qos: .utility).async {
+            do {
+                // Remove network setup daemon and components (requires admin privileges)
+                try NetworkSetupHelper.uninstall()
+
+                DispatchQueue.main.async {
+                    // Unregister from launch at login
+                    LaunchAtLoginHelper.disable()
+
+                    // Move app to trash
+                    self.moveAppToTrash()
+
+                    // Quit the app
+                    DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
+                        NSApplication.shared.terminate(nil)
+                    }
+                }
+            } catch {
+                DispatchQueue.main.async {
+                    self.showErrorAlert(message: error.localizedDescription)
+                    self.uninstallInProgress = false
+                }
+            }
+        }
+    }
+
+    private func showErrorAlert(message: String) {
+        let alert = NSAlert()
+        alert.messageText = "Uninstall Failed"
+        alert.informativeText = message
+        alert.alertStyle = .critical
+        alert.addButton(withTitle: "OK")
+        alert.runModal()
+    }
+
+    private func moveAppToTrash() {
+        guard let appURL = Bundle.main.bundleURL as URL? else { return }
+        do {
+            try FileManager.default.trashItem(at: appURL, resultingItemURL: nil)
+        } catch {
+            // If we can't trash the app, that's OK - user can do it manually
+            // The important system components have already been cleaned up
+        }
+    }
+
     private var buildTag: String {
         Bundle.main.infoDictionary?["EXOBuildTag"] as? String ?? "unknown"
     }
@@ -617,14 +702,27 @@ private struct HoverButton: View {
     let title: String
     let tint: Color
     let trailingSystemImage: String?
+    let small: Bool
     let action: () -> Void
 
+    init(
+        title: String, tint: Color = .primary, trailingSystemImage: String? = nil,
+        small: Bool = false, action: @escaping () -> Void
+    ) {
+        self.title = title
+        self.tint = tint
+        self.trailingSystemImage = trailingSystemImage
+        self.small = small
+        self.action = action
+    }
+
     @State private var isHovering = false
 
     var body: some View {
         Button(action: action) {
             HStack {
                 Text(title)
+                    .font(small ? .caption : nil)
                 Spacer()
                 if let systemName = trailingSystemImage {
                     Image(systemName: systemName)
@@ -632,8 +730,8 @@ private struct HoverButton: View {
                 }
             }
             .frame(maxWidth: .infinity, alignment: .leading)
-            .padding(.vertical, 6)
-            .padding(.horizontal, 8)
+            .padding(.vertical, small ? 4 : 6)
+            .padding(.horizontal, small ? 6 : 8)
             .background(
                 RoundedRectangle(cornerRadius: 6)
                     .fill(

app/EXO/EXO/EXOApp.swift

@@ -132,6 +132,24 @@ struct EXOApp: App {
     }
 }
 
+/// Helper for managing EXO's launch-at-login registration
+enum LaunchAtLoginHelper {
+    private static let logger = Logger(subsystem: "io.exo.EXO", category: "LaunchAtLogin")
+
+    /// Unregisters EXO from launching at login
+    static func disable() {
+        guard SMAppService.mainApp.status == .enabled else { return }
+        do {
+            try SMAppService.mainApp.unregister()
+            logger.info("Unregistered EXO from launch at login")
+        } catch {
+            logger.error(
+                "Failed to unregister EXO from launch at login: \(error.localizedDescription, privacy: .public)"
+            )
+        }
+    }
+}
+
 final class SparkleUpdater: NSObject, ObservableObject {
     private let controller: SPUStandardUpdaterController
     private let delegateProxy: ExoUpdaterDelegate

app/EXO/EXO/Services/NetworkSetupHelper.swift

@@ -6,7 +6,7 @@ enum NetworkSetupHelper {
     private static let logger = Logger(subsystem: "io.exo.EXO", category: "NetworkSetup")
     private static let daemonLabel = "io.exo.networksetup"
     private static let scriptDestination =
-        "/Library/Application Support/EXO/disable_bridge_enable_dhcp.sh"
+        "/Library/Application Support/EXO/disable_bridge.sh"
     private static let plistDestination = "/Library/LaunchDaemons/io.exo.networksetup.plist"
     private static let requiredStartInterval: Int = 1791
 
@@ -28,42 +28,14 @@ enum NetworkSetupHelper {
         # Remove Thunderbolt Bridge from VirtualNetworkInterfaces in preferences.plist
         /usr/libexec/PlistBuddy -c "Delete :VirtualNetworkInterfaces:Bridge:bridge0" "$PREFS" 2>/dev/null || true
 
-        networksetup -listlocations | grep -q exo || {
-          networksetup -createlocation exo
-        }
-
-        networksetup -switchtolocation exo
-        networksetup -listallhardwareports \\
-          | awk -F': ' '/Hardware Port: / {print $2}' \\
-          | while IFS=":" read -r name; do
-              case "$name" in
-                "Ethernet Adapter"*)
-                        ;;
-                "Thunderbolt Bridge")
-                        ;;
-                "Thunderbolt "*)
-                  networksetup -listallnetworkservices \\
-                    | grep -q "EXO $name" \\
-                      || networksetup -createnetworkservice "EXO $name" "$name" 2>/dev/null \\
-                      || continue
-                  networksetup -setdhcp "EXO $name"
-                        ;;
-                *)
-                  networksetup -listallnetworkservices \\
-                    | grep -q "$name" \\
-                      || networksetup -createnetworkservice "$name" "$name" 2>/dev/null \\
-                      || continue
-                        ;;
-              esac
-            done
-
         networksetup -listnetworkservices | grep -q "Thunderbolt Bridge" && {
           networksetup -setnetworkserviceenabled "Thunderbolt Bridge" off
         } || true
         """
 
     static func ensureLaunchDaemonInstalled() {
-        Task.detached {
+        // Use .utility priority to match NSAppleScript's internal QoS and avoid priority inversion
+        Task.detached(priority: .utility) {
             do {
                 if daemonAlreadyInstalled() {
                     return
@@ -78,6 +50,63 @@ enum NetworkSetupHelper {
         }
     }
 
+    /// Removes all EXO network setup components from the system.
+    /// This includes the LaunchDaemon, scripts, logs, and network location.
+    /// Requires admin privileges.
+    static func uninstall() throws {
+        let uninstallScript = makeUninstallScript()
+        try runShellAsAdmin(uninstallScript)
+        logger.info("EXO network setup components removed successfully")
+    }
+
+    /// Checks if there are any EXO network components installed that need cleanup
+    static func hasInstalledComponents() -> Bool {
+        let manager = FileManager.default
+        let scriptExists = manager.fileExists(atPath: scriptDestination)
+        let plistExists = manager.fileExists(atPath: plistDestination)
+        return scriptExists || plistExists
+    }
+
+    private static func makeUninstallScript() -> String {
+        """
+        set -euo pipefail
+
+        LABEL="\(daemonLabel)"
+        SCRIPT_DEST="\(scriptDestination)"
+        PLIST_DEST="\(plistDestination)"
+        LOG_OUT="/var/log/\(daemonLabel).log"
+        LOG_ERR="/var/log/\(daemonLabel).err.log"
+
+        # Unload the LaunchDaemon if running
+        launchctl bootout system/"$LABEL" 2>/dev/null || true
+
+        # Remove LaunchDaemon plist
+        rm -f "$PLIST_DEST"
+
+        # Remove the script and parent directory if empty
+        rm -f "$SCRIPT_DEST"
+        rmdir "$(dirname "$SCRIPT_DEST")" 2>/dev/null || true
+
+        # Remove log files
+        rm -f "$LOG_OUT" "$LOG_ERR"
+
+        # Switch back to Automatic network location
+        networksetup -switchtolocation Automatic 2>/dev/null || true
+
+        # Delete the exo network location if it exists
+        networksetup -listlocations | grep -q '^exo$' && {
+          networksetup -deletelocation exo 2>/dev/null || true
+        } || true
+
+        # Re-enable Thunderbolt Bridge if it exists
+        networksetup -listnetworkservices | grep -q "Thunderbolt Bridge" && {
+          networksetup -setnetworkserviceenabled "Thunderbolt Bridge" on 2>/dev/null || true
+        } || true
+
+        echo "EXO network components removed successfully"
+        """
+    }
+
     private static func daemonAlreadyInstalled() -> Bool {
         let manager = FileManager.default
         let scriptExists = manager.fileExists(atPath: scriptDestination)

app/EXO/EXO/ViewModels/InstanceViewModel.swift

@@ -57,7 +57,7 @@ struct InstanceViewModel: Identifiable, Equatable {
         case waiting
         case failed
         case idle
-        case unknown
+        case preparing
 
         var label: String {
             switch self {
@@ -68,7 +68,7 @@ struct InstanceViewModel: Identifiable, Equatable {
             case .waiting: return "Waiting"
             case .failed: return "Failed"
             case .idle: return "Idle"
-            case .unknown: return "Unknown"
+            case .preparing: return "Preparing"
             }
         }
     }
@@ -185,7 +185,7 @@ extension InstanceViewModel.State {
         } else if statuses.isEmpty {
             self = .idle
         } else {
-            self = .unknown
+            self = .preparing
         }
     }
 }

app/EXO/EXO/Views/InstanceRowView.swift

@@ -83,7 +83,7 @@ struct InstanceRowView: View {
         case .ready: return .teal
         case .waiting, .idle: return .gray
         case .failed: return .red
-        case .unknown: return .secondary
+        case .preparing: return .secondary
         }
     }
 

app/EXO/uninstall-exo.sh

@@ -0,0 +1,154 @@
+#!/usr/bin/env bash
+#
+# EXO Uninstaller Script
+#
+# This script removes all EXO system components that persist after deleting the app.
+# Run with: sudo ./uninstall-exo.sh
+#
+# Components removed:
+# - LaunchDaemon: /Library/LaunchDaemons/io.exo.networksetup.plist
+# - Network script: /Library/Application Support/EXO/
+# - Log files: /var/log/io.exo.networksetup.*
+# - Network location: "exo"
+# - Launch at login registration
+#
+
+set -euo pipefail
+
+LABEL="io.exo.networksetup"
+SCRIPT_DEST="/Library/Application Support/EXO/disable_bridge_enable_dhcp.sh"
+PLIST_DEST="/Library/LaunchDaemons/io.exo.networksetup.plist"
+LOG_OUT="/var/log/${LABEL}.log"
+LOG_ERR="/var/log/${LABEL}.err.log"
+APP_BUNDLE_ID="io.exo.EXO"
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m' # No Color
+
+echo_info() {
+    echo -e "${GREEN}[INFO]${NC} $1"
+}
+
+echo_warn() {
+    echo -e "${YELLOW}[WARN]${NC} $1"
+}
+
+echo_error() {
+    echo -e "${RED}[ERROR]${NC} $1"
+}
+
+# Check if running as root
+if [[ $EUID -ne 0 ]]; then
+    echo_error "This script must be run as root (use sudo)"
+    exit 1
+fi
+
+echo ""
+echo "========================================"
+echo "        EXO Uninstaller"
+echo "========================================"
+echo ""
+
+# Unload the LaunchDaemon if running
+echo_info "Stopping network setup daemon..."
+if launchctl list | grep -q "$LABEL"; then
+    launchctl bootout system/"$LABEL" 2>/dev/null || true
+    echo_info "Daemon stopped"
+else
+    echo_warn "Daemon was not running"
+fi
+
+# Remove LaunchDaemon plist
+if [[ -f "$PLIST_DEST" ]]; then
+    rm -f "$PLIST_DEST"
+    echo_info "Removed LaunchDaemon plist"
+else
+    echo_warn "LaunchDaemon plist not found (already removed?)"
+fi
+
+# Remove the script and parent directory
+if [[ -f "$SCRIPT_DEST" ]]; then
+    rm -f "$SCRIPT_DEST"
+    echo_info "Removed network setup script"
+else
+    echo_warn "Network setup script not found (already removed?)"
+fi
+
+# Remove EXO directory if empty
+if [[ -d "/Library/Application Support/EXO" ]]; then
+    rmdir "/Library/Application Support/EXO" 2>/dev/null && \
+        echo_info "Removed EXO support directory" || \
+        echo_warn "EXO support directory not empty, leaving in place"
+fi
+
+# Remove log files
+if [[ -f "$LOG_OUT" ]] || [[ -f "$LOG_ERR" ]]; then
+    rm -f "$LOG_OUT" "$LOG_ERR"
+    echo_info "Removed log files"
+else
+    echo_warn "Log files not found (already removed?)"
+fi
+
+# Switch back to Automatic network location
+echo_info "Restoring network configuration..."
+if networksetup -listlocations | grep -q "^Automatic$"; then
+    networksetup -switchtolocation Automatic 2>/dev/null || true
+    echo_info "Switched to Automatic network location"
+else
+    echo_warn "Automatic network location not found"
+fi
+
+# Delete the exo network location if it exists
+if networksetup -listlocations | grep -q "^exo$"; then
+    networksetup -deletelocation exo 2>/dev/null || true
+    echo_info "Deleted 'exo' network location"
+else
+    echo_warn "'exo' network location not found (already removed?)"
+fi
+
+# Re-enable Thunderbolt Bridge if it exists
+if networksetup -listnetworkservices 2>/dev/null | grep -q "Thunderbolt Bridge"; then
+    networksetup -setnetworkserviceenabled "Thunderbolt Bridge" on 2>/dev/null || true
+    echo_info "Re-enabled Thunderbolt Bridge"
+fi
+
+# Note about launch at login registration
+# SMAppService-based login items cannot be removed from a shell script.
+# They can only be unregistered from within the app itself or manually via System Settings.
+echo_warn "Launch at login must be removed manually:"
+echo_warn "  System Settings → General → Login Items → Remove EXO"
+
+# Check if EXO.app exists in common locations
+APP_FOUND=false
+for app_path in "/Applications/EXO.app" "$HOME/Applications/EXO.app"; do
+    if [[ -d "$app_path" ]]; then
+        if [[ "$APP_FOUND" == false ]]; then
+            echo ""
+            APP_FOUND=true
+        fi
+        echo_warn "EXO.app found at: $app_path"
+        echo_warn "You may want to move it to Trash manually."
+    fi
+done
+
+echo ""
+echo "========================================"
+echo_info "EXO uninstall complete!"
+echo "========================================"
+echo ""
+echo "The following have been removed:"
+echo "  • Network setup LaunchDaemon"
+echo "  • Network configuration script"
+echo "  • Log files"
+echo "  • 'exo' network location"
+echo ""
+echo "Your network has been restored to use the 'Automatic' location."
+echo "Thunderbolt Bridge has been re-enabled (if present)."
+echo ""
+echo "Manual step required:"
+echo "  Remove EXO from Login Items in System Settings → General → Login Items"
+echo ""
+

dashboard/src/lib/stores/app.svelte.ts

@@ -99,7 +99,7 @@ interface RawNodeProfile {
 
 interface RawTopologyNode {
 	nodeId: string;
-	nodeProfile: RawNodeProfile;
+	nodeProfile?: RawNodeProfile;
 }
 
 interface RawTopologyConnection {
@@ -110,9 +110,19 @@ interface RawTopologyConnection {
 		| string;
 }
 
+// Connection can be an object or a tuple [source, target, metadata]
+type RawConnectionItem =
+	| RawTopologyConnection
+	| [
+			string,
+			string,
+			{ sinkMultiaddr?: { ip_address?: string; address?: string } }?,
+	  ];
+
 interface RawTopology {
-	nodes: RawTopologyNode[];
-	connections?: RawTopologyConnection[];
+	// nodes can be array of strings (node IDs) or array of objects with nodeId/nodeProfile
+	nodes: (string | RawTopologyNode)[];
+	connections?: RawConnectionItem[];
 }
 
 type RawNodeProfiles = Record<string, RawNodeProfile>;
@@ -213,9 +223,18 @@ function transformTopology(
 	const nodes: Record<string, NodeInfo> = {};
 	const edges: TopologyEdge[] = [];
 
+	// Handle nodes - can be array of strings (node IDs) or array of objects with nodeId/nodeProfile
 	for (const node of raw.nodes || []) {
-		const mergedProfile = profiles?.[node.nodeId];
-		const profile = { ...(node.nodeProfile ?? {}), ...(mergedProfile ?? {}) };
+		// Determine the node ID - could be a string or an object with nodeId property
+		const nodeId = typeof node === "string" ? node : node.nodeId;
+		if (!nodeId) continue;
+
+		// Get the profile - from the separate profiles map or from the node object itself
+		const profileFromMap = profiles?.[nodeId];
+		const profileFromNode =
+			typeof node === "object" ? node.nodeProfile : undefined;
+		const profile = { ...(profileFromNode ?? {}), ...(profileFromMap ?? {}) };
+
 		const ramTotal = profile?.memory?.ramTotal?.inBytes ?? 0;
 		const ramAvailable = profile?.memory?.ramAvailable?.inBytes ?? 0;
 		const ramUsage = Math.max(ramTotal - ramAvailable, 0);
@@ -264,7 +283,7 @@ function transformTopology(
 			}
 		}
 
-		nodes[node.nodeId] = {
+		nodes[nodeId] = {
 			system_info: {
 				model_id: profile?.modelId ?? "Unknown",
 				chip: profile?.chipId,
@@ -292,14 +311,39 @@ function transformTopology(
 		};
 	}
 
+	// Handle connections - can be objects with localNodeId/sendBackNodeId or tuples [source, target, metadata]
 	for (const conn of raw.connections || []) {
-		if (!conn.localNodeId || !conn.sendBackNodeId) continue;
-		if (conn.localNodeId === conn.sendBackNodeId) continue;
-		if (!nodes[conn.localNodeId] || !nodes[conn.sendBackNodeId]) continue;
+		let localNodeId: string | undefined;
+		let sendBackNodeId: string | undefined;
+		let sendBackMultiaddr:
+			| { multiaddr?: string; address?: string; ip_address?: string }
+			| string
+			| undefined;
+
+		// Check if it's a tuple format [source, target, metadata]
+		if (Array.isArray(conn)) {
+			localNodeId = conn[0] as string;
+			sendBackNodeId = conn[1] as string;
+			const metadata = conn[2] as
+				| { sinkMultiaddr?: { ip_address?: string; address?: string } }
+				| undefined;
+			if (metadata?.sinkMultiaddr) {
+				sendBackMultiaddr = metadata.sinkMultiaddr;
+			}
+		} else {
+			// Object format with localNodeId/sendBackNodeId
+			localNodeId = conn.localNodeId;
+			sendBackNodeId = conn.sendBackNodeId;
+			sendBackMultiaddr = conn.sendBackMultiaddr;
+		}
+
+		if (!localNodeId || !sendBackNodeId) continue;
+		if (localNodeId === sendBackNodeId) continue;
+		if (!nodes[localNodeId] || !nodes[sendBackNodeId]) continue;
 
 		let sendBackIp: string | undefined;
-		if (conn.sendBackMultiaddr) {
-			const multi = conn.sendBackMultiaddr;
+		if (sendBackMultiaddr) {
+			const multi = sendBackMultiaddr;
 			if (typeof multi === "string") {
 				sendBackIp = extractIpFromMultiaddr(multi);
 			} else {
@@ -311,8 +355,8 @@ function transformTopology(
 		}
 
 		edges.push({
-			source: conn.localNodeId,
-			target: conn.sendBackNodeId,
+			source: localNodeId,
+			target: sendBackNodeId,
 			sendBackIp,
 		});
 	}

dashboard/src/routes/+page.svelte

@@ -593,7 +593,7 @@ function toggleInstanceDownloadDetails(nodeId: string): void {
 		// Unwrap the instance
 		const [instanceTag, instance] = getTagged(instanceWrapped);
 		if (!instance || typeof instance !== 'object') {
-			return { isDownloading: false, progress: null, statusText: 'UNKNOWN', perNode: [] };
+			return { isDownloading: false, progress: null, statusText: 'PREPARING', perNode: [] };
 		}
 
 		const inst = instance as { shardAssignments?: { nodeToRunner?: Record<string, string>; runnerToShard?: Record<string, unknown>; modelId?: string } };
@@ -706,7 +706,7 @@ function toggleInstanceDownloadDetails(nodeId: string): void {
 	function deriveInstanceStatus(instanceWrapped: unknown): { statusText: string; statusClass: string } {
 		const [, instance] = getTagged(instanceWrapped);
 		if (!instance || typeof instance !== 'object') {
-			return { statusText: 'UNKNOWN', statusClass: 'inactive' };
+			return { statusText: 'PREPARING', statusClass: 'inactive' };
 		}
 		
 		const inst = instance as { shardAssignments?: { runnerToShard?: Record<string, unknown> } };
@@ -735,7 +735,7 @@ function toggleInstanceDownloadDetails(nodeId: string): void {
 
 		const has = (s: string) => statuses.includes(s);
 
-		if (statuses.length === 0) return { statusText: 'UNKNOWN', statusClass: 'inactive' };
+		if (statuses.length === 0) return { statusText: 'PREPARING', statusClass: 'inactive' };
 		if (has('Failed')) return { statusText: 'FAILED', statusClass: 'failed' };
 		if (has('Shutdown')) return { statusText: 'SHUTDOWN', statusClass: 'inactive' };
 		if (has('Loading')) return { statusText: 'LOADING', statusClass: 'starting' };
@@ -1267,9 +1267,9 @@ function toggleInstanceDownloadDetails(nodeId: string): void {
 							<div class="flex-1 h-px bg-gradient-to-r from-exo-yellow/30 to-transparent"></div>
 						</div>
 						
-						<div 
+						<div
 							bind:this={instancesContainerRef}
-							class="max-h-72 space-y-3 overflow-y-auto"
+							class="max-h-72 xl:max-h-96 space-y-3 overflow-y-auto overflow-x-hidden py-px"
 						>
 								{#each Object.entries(instanceData) as [id, instance]}
 									{@const downloadInfo = getInstanceDownloadStatus(id, instance)}
@@ -1773,7 +1773,7 @@ function toggleInstanceDownloadDetails(nodeId: string): void {
 								<h3 class="text-xs text-exo-yellow font-mono tracking-[0.2em] uppercase">Instances</h3>
 								<div class="flex-1 h-px bg-gradient-to-r from-exo-yellow/30 to-transparent"></div>
 							</div>
-								<div class="space-y-3 max-h-72 overflow-y-auto pr-1">
+								<div class="space-y-3 max-h-72 xl:max-h-96 overflow-y-auto overflow-x-hidden py-px pr-1">
 									{#each Object.entries(instanceData) as [id, instance]}
 										{@const downloadInfo = getInstanceDownloadStatus(id, instance)}
 										{@const statusText = downloadInfo.statusText}

pyproject.toml

@@ -8,27 +8,15 @@ dependencies = [
     "aiofiles>=24.1.0",
     "aiohttp>=3.12.14",
     "types-aiofiles>=24.1.0.20250708",
-    "typeguard>=4.4.4",
     "pydantic>=2.11.7",
-    "base58>=2.1.1",
-    "cryptography>=45.0.5",
     "fastapi>=0.116.1",
     "filelock>=3.18.0",
-    "aiosqlite>=0.21.0",
-    "networkx>=3.5",
-    "protobuf>=6.32.0",
-    "rich>=14.1.0",
     "rustworkx>=0.17.1",
-    "sqlmodel>=0.0.24",
-    "sqlalchemy[asyncio]>=2.0.43",
-    "greenlet>=3.2.4",
     "huggingface-hub>=0.33.4",
     "psutil>=7.0.0",
     "loguru>=0.7.3",
-    "textual>=5.3.0",
     "exo_pyo3_bindings", # rust bindings
     "anyio==4.11.0",
-    "bidict>=0.23.1",
     "mlx>=0.30.1; sys_platform == 'darwin'",
     "mlx[cpu]>=0.30.1; sys_platform == 'linux'",
     "mlx-lm>=0.28.3",

src/exo/master/api.py

@@ -236,6 +236,7 @@ class API:
                     instance_meta=instance_meta,
                     min_nodes=min_nodes,
                 ),
+                node_profiles=self.state.node_profiles,
                 topology=self.state.topology,
                 current_instances=self.state.instances,
             )
@@ -291,6 +292,7 @@ class API:
                             instance_meta=instance_meta,
                             min_nodes=min_nodes,
                         ),
+                        node_profiles=self.state.node_profiles,
                         topology=self.state.topology,
                         current_instances=self.state.instances,
                     )
@@ -599,9 +601,8 @@ class API:
         """Calculate total available memory across all nodes in bytes."""
         total_available = Memory()
 
-        for node in self.state.topology.list_nodes():
-            if node.node_profile is not None:
-                total_available += node.node_profile.memory.ram_available
+        for profile in self.state.node_profiles.values():
+            total_available += profile.memory.ram_available
 
         return total_available
 

src/exo/master/main.py

@@ -158,6 +158,7 @@ class Master:
                                 command,
                                 self.state.topology,
                                 self.state.instances,
+                                self.state.node_profiles,
                             )
                             transition_events = get_transition_events(
                                 self.state.instances, placement
@@ -200,9 +201,7 @@ class Master:
     async def _plan(self) -> None:
         while True:
             # kill broken instances
-            connected_node_ids = set(
-                [x.node_id for x in self.state.topology.list_nodes()]
-            )
+            connected_node_ids = set([x for x in self.state.topology.list_nodes()])
             for instance_id, instance in self.state.instances.items():
                 for node_id in instance.shard_assignments.node_to_runner:
                     if node_id not in connected_node_ids:

src/exo/master/placement.py

@@ -6,9 +6,10 @@ from typing import Sequence
 from loguru import logger
 
 from exo.master.placement_utils import (
+    NodeWithProfile,
     filter_cycles_by_memory,
-    get_mlx_ibv_devices_matrix,
     get_mlx_jaccl_coordinators,
+    get_mlx_jaccl_devices_matrix,
     get_mlx_ring_hosts_by_node,
     get_shard_assignments,
     get_smallest_cycles,
@@ -19,10 +20,11 @@ from exo.shared.types.commands import (
     DeleteInstance,
     PlaceInstance,
 )
+from exo.shared.types.common import NodeId
 from exo.shared.types.events import Event, InstanceCreated, InstanceDeleted
 from exo.shared.types.memory import Memory
 from exo.shared.types.models import ModelId
-from exo.shared.types.topology import NodeInfo
+from exo.shared.types.profiling import NodePerformanceProfile
 from exo.shared.types.worker.instances import (
     Instance,
     InstanceId,
@@ -52,19 +54,16 @@ def place_instance(
     command: PlaceInstance,
     topology: Topology,
     current_instances: Mapping[InstanceId, Instance],
+    node_profiles: Mapping[NodeId, NodePerformanceProfile],
 ) -> dict[InstanceId, Instance]:
     all_nodes = list(topology.list_nodes())
 
-    logger.info("finding cycles:")
-    cycles = topology.get_cycles()
-    singleton_cycles = [[node] for node in all_nodes]
-    candidate_cycles = list(
-        filter(lambda it: len(it) >= command.min_nodes, cycles + singleton_cycles)
-    )
+    cycles = topology.get_cycles() + [[node] for node in all_nodes]
+    candidate_cycles = list(filter(lambda it: len(it) >= command.min_nodes, cycles))
     cycles_with_sufficient_memory = filter_cycles_by_memory(
-        candidate_cycles, command.model_meta.storage_size
+        candidate_cycles, node_profiles, command.model_meta.storage_size
     )
-    if not cycles_with_sufficient_memory:
+    if len(cycles_with_sufficient_memory) == 0:
         raise ValueError("No cycles found with sufficient memory")
 
     if command.sharding == Sharding.Tensor:
@@ -94,13 +93,15 @@ def place_instance(
     smallest_tb_cycles = [
         cycle
         for cycle in smallest_cycles
-        if topology.get_subgraph_from_nodes(cycle).is_thunderbolt_cycle(cycle)
+        if topology.get_subgraph_from_nodes(
+            [node.node_id for node in cycle]
+        ).is_thunderbolt_cycle([node.node_id for node in cycle])
     ]
 
     if smallest_tb_cycles != []:
         smallest_cycles = smallest_tb_cycles
 
-    cycles_with_leaf_nodes: list[list[NodeInfo]] = [
+    cycles_with_leaf_nodes: list[list[NodeWithProfile]] = [
         cycle
         for cycle in smallest_cycles
         if any(topology.node_is_leaf(node.node_id) for node in cycle)
@@ -109,11 +110,7 @@ def place_instance(
     selected_cycle = max(
         cycles_with_leaf_nodes if cycles_with_leaf_nodes != [] else smallest_cycles,
         key=lambda cycle: sum(
-            (
-                node.node_profile.memory.ram_available
-                for node in cycle
-                if node.node_profile is not None
-            ),
+            (node.node_profile.memory.ram_available for node in cycle),
             start=Memory(),
         ),
     )
@@ -122,14 +119,16 @@ def place_instance(
         command.model_meta, selected_cycle, command.sharding
     )
 
-    cycle_digraph: Topology = topology.get_subgraph_from_nodes(selected_cycle)
+    cycle_digraph: Topology = topology.get_subgraph_from_nodes(
+        [node.node_id for node in selected_cycle]
+    )
 
     instance_id = InstanceId()
     target_instances = dict(deepcopy(current_instances))
 
     if len(selected_cycle) == 1:
         logger.warning(
-            "You have likely selected ibv for a single node instance; falling back to MlxRing"
+            "You have likely selected jaccl for a single node instance; falling back to MlxRing"
         )
 
         command.instance_meta = InstanceMeta.MlxRing
@@ -137,19 +136,18 @@ def place_instance(
     # TODO: Single node instances
     match command.instance_meta:
         case InstanceMeta.MlxJaccl:
-            mlx_ibv_devices = get_mlx_ibv_devices_matrix(
-                selected_cycle,
+            mlx_jaccl_devices = get_mlx_jaccl_devices_matrix(
                 cycle_digraph,
             )
             mlx_jaccl_coordinators = get_mlx_jaccl_coordinators(
-                selected_cycle,
+                coordinator=selected_cycle[0].node_id,
                 coordinator_port=random_ephemeral_port(),
                 cycle_digraph=cycle_digraph,
             )
             target_instances[instance_id] = MlxJacclInstance(
                 instance_id=instance_id,
                 shard_assignments=shard_assignments,
-                ibv_devices=mlx_ibv_devices,
+                jaccl_devices=mlx_jaccl_devices,
                 jaccl_coordinators=mlx_jaccl_coordinators,
             )
         case InstanceMeta.MlxRing:

src/exo/master/placement_utils.py

@@ -1,5 +1,4 @@
-from collections.abc import Generator
-from typing import TypeGuard, cast
+from collections.abc import Generator, Mapping
 
 from loguru import logger
 from pydantic import BaseModel
@@ -9,7 +8,7 @@ from exo.shared.types.common import Host, NodeId
 from exo.shared.types.memory import Memory
 from exo.shared.types.models import ModelMetadata
 from exo.shared.types.profiling import NodePerformanceProfile
-from exo.shared.types.topology import NodeInfo
+from exo.shared.types.topology import RDMAConnection, SocketConnection
 from exo.shared.types.worker.runners import RunnerId, ShardAssignments
 from exo.shared.types.worker.shards import (
     PipelineShardMetadata,
@@ -24,27 +23,32 @@ class NodeWithProfile(BaseModel):
     node_profile: NodePerformanceProfile
 
 
-def narrow_all_nodes(nodes: list[NodeInfo]) -> TypeGuard[list[NodeWithProfile]]:
-    return all(node.node_profile is not None for node in nodes)
-
-
 def filter_cycles_by_memory(
-    cycles: list[list[NodeInfo]], required_memory: Memory
-) -> list[list[NodeInfo]]:
-    filtered_cycles: list[list[NodeInfo]] = []
+    cycles: list[list[NodeId]],
+    node_profiles: Mapping[NodeId, NodePerformanceProfile],
+    required_memory: Memory,
+) -> list[list[NodeWithProfile]]:
+    filtered_cycles: list[list[NodeWithProfile]] = []
     for cycle in cycles:
-        if not narrow_all_nodes(cycle):
+        if not all(node in node_profiles for node in cycle):
             continue
 
         total_mem = sum(
-            (node.node_profile.memory.ram_available for node in cycle), start=Memory()
+            (node_profiles[node].memory.ram_available for node in cycle), start=Memory()
         )
         if total_mem >= required_memory:
-            filtered_cycles.append(cast(list[NodeInfo], cycle))
+            filtered_cycles.append(
+                [
+                    NodeWithProfile(node_id=node, node_profile=node_profiles[node])
+                    for node in cycle
+                ]
+            )
     return filtered_cycles
 
 
-def get_smallest_cycles(cycles: list[list[NodeInfo]]) -> list[list[NodeInfo]]:
+def get_smallest_cycles(
+    cycles: list[list[NodeWithProfile]],
+) -> list[list[NodeWithProfile]]:
     min_nodes = min(len(cycle) for cycle in cycles)
     return [cycle for cycle in cycles if len(cycle) == min_nodes]
 
@@ -135,11 +139,9 @@ def get_shard_assignments_for_tensor_parallel(
 
 def get_shard_assignments(
     model_meta: ModelMetadata,
-    selected_cycle: list[NodeInfo],
+    selected_cycle: list[NodeWithProfile],
     sharding: Sharding,
 ) -> ShardAssignments:
-    if not narrow_all_nodes(selected_cycle):
-        raise ValueError("All nodes must have profiles to create shard assignments")
     match sharding:
         case Sharding.Pipeline:
             return get_shard_assignments_for_pipeline_parallel(
@@ -176,17 +178,16 @@ def get_hosts_from_subgraph(cycle_digraph: Topology) -> list[Host]:
         current_node = cycle[i]
         next_node = cycle[(i + 1) % len(cycle)]
 
-        for connection in cycle_digraph.list_connections():
-            if (
-                connection.local_node_id == current_node.node_id
-                and connection.send_back_node_id == next_node.node_id
-            ):
+        for src, sink, connection in cycle_digraph.list_connections():
+            if not isinstance(connection, SocketConnection):
+                continue
+
+            if src == current_node and sink == next_node:
                 if get_thunderbolt and not connection.is_thunderbolt():
                     continue
-                assert connection.send_back_multiaddr is not None
                 host = Host(
-                    ip=connection.send_back_multiaddr.ip_address,
-                    port=connection.send_back_multiaddr.port,
+                    ip=connection.sink_multiaddr.ip_address,
+                    port=connection.sink_multiaddr.port,
                 )
                 hosts.append(host)
                 break
@@ -194,8 +195,7 @@ def get_hosts_from_subgraph(cycle_digraph: Topology) -> list[Host]:
     return hosts
 
 
-def get_mlx_ibv_devices_matrix(
-    selected_cycle: list[NodeInfo],
+def get_mlx_jaccl_devices_matrix(
     cycle_digraph: Topology,
 ) -> list[list[str | None]]:
     """Build connectivity matrix mapping device i to device j via RDMA interface names.
@@ -204,6 +204,7 @@ def get_mlx_ibv_devices_matrix(
     to device j, or None if no connection exists or no interface name is found.
     Diagonal elements are always None.
     """
+    selected_cycle = list(cycle_digraph.list_nodes())
     num_nodes = len(selected_cycle)
     matrix: list[list[str | None]] = [
         [None for _ in range(num_nodes)] for _ in range(num_nodes)
@@ -214,71 +215,38 @@ def get_mlx_ibv_devices_matrix(
             if i == j:
                 continue
 
-            # Find the IP J uses to talk to I
-            for connection_ip, _ in _find_connection_ip(node_j, node_i, cycle_digraph):
-                # This is a local IP on I, which is attached to an interface: find that interface
-                if interface_name := _find_rdma_interface_name_for_ip(
-                    connection_ip, node_i
-                ):
-                    matrix[i][j] = interface_name
-                    logger.info(
-                        f"Interface name for {connection_ip} on {node_i.node_id}: {interface_name}"
-                    )
+            for conn in cycle_digraph.get_all_connections_between(node_i, node_j):
+                if isinstance(conn, RDMAConnection):
+                    matrix[i][j] = conn.source_rdma_iface
                     break
             else:
                 logger.warning(
-                    f"Failed to find interface name between {node_i.node_id} and {node_j.node_id}"
+                    f"Failed to find interface name between {node_i} and {node_j}"
                 )
                 raise ValueError(
-                    "Current ibv backend requires all-to-all rdma connections"
+                    "Current jaccl backend requires all-to-all RDMA connections"
                 )
 
     return matrix
 
 
 def _find_connection_ip(
-    node_i: NodeInfo,
-    node_j: NodeInfo,
+    node_i: NodeId,
+    node_j: NodeId,
     cycle_digraph: Topology,
 ) -> Generator[tuple[str, bool]]:
-    """Find all IP addresses that connect node i to node j, with thunderbolt flag."""
-    for connection in cycle_digraph.list_connections():
-        if (
-            connection.local_node_id == node_i.node_id
-            and connection.send_back_node_id == node_j.node_id
-        ):
-            yield connection.send_back_multiaddr.ip_address, connection.is_thunderbolt()
-
-
-def _find_rdma_interface_name_for_ip(
-    ip_address: str,
-    node_info: NodeInfo,
-) -> str | None:
-    if node_info.node_profile is None:
-        return None
-
-    logger.info(f"Searching {node_info.node_id} for ip {ip_address}:")
-    for interface in node_info.node_profile.network_interfaces:
-        if interface.name not in ["en2", "en3", "en4", "en5", "en6", "en7"]:
-            continue
-        logger.info(f" | {interface.name}: {interface.ip_address}")
-        if interface.ip_address != ip_address:
-            continue
-
-        logger.info("Found")
-        return f"rdma_{interface.name}"
-
-    return None
+    """Find all IP addresses that connect node i to node j."""
+    # TODO: Prioritise ETHERNET > ??WIFI > TB for coordinator
+    for connection in cycle_digraph.get_all_connections_between(node_i, node_j):
+        if isinstance(connection, SocketConnection):
+            yield connection.sink_multiaddr.ip_address, connection.is_thunderbolt()
 
 
 def _find_interface_name_for_ip(
     ip_address: str,
-    node_info: NodeInfo,
+    node_info: NodeWithProfile,
 ) -> str | None:
     """Find the interface name for an IP address on a node (any interface)."""
-    if node_info.node_profile is None:
-        return None
-
     for interface in node_info.node_profile.network_interfaces:
         if interface.ip_address == ip_address:
             return interface.name
@@ -287,7 +255,7 @@ def _find_interface_name_for_ip(
 
 
 def _find_ip_prioritised(
-    node: NodeInfo, other_node: NodeInfo, cycle_digraph: Topology
+    node: NodeWithProfile, other_node: NodeWithProfile, cycle_digraph: Topology
 ) -> str | None:
     # TODO: Actually prioritize in the correct Ethernet > Wifi > Non-TB > TB order.
     """Find an IP address between nodes with prioritization.
@@ -298,7 +266,7 @@ def _find_ip_prioritised(
     3. Non-Thunderbolt connections
     4. Any other IP address
     """
-    ips = list(_find_connection_ip(node, other_node, cycle_digraph))
+    ips = list(_find_connection_ip(node.node_id, other_node.node_id, cycle_digraph))
     # We expect a unique iface -> ip mapping
     iface_map = {_find_interface_name_for_ip(ip, other_node): ip for ip, _ in ips}
 
@@ -324,7 +292,7 @@ def _find_ip_prioritised(
 
 
 def get_mlx_ring_hosts_by_node(
-    selected_cycle: list[NodeInfo],
+    selected_cycle: list[NodeWithProfile],
     cycle_digraph: Topology,
     ephemeral_port: int,
 ) -> dict[NodeId, list[Host]]:
@@ -361,7 +329,7 @@ def get_mlx_ring_hosts_by_node(
             connection_ip = _find_ip_prioritised(node, other_node, cycle_digraph)
             if connection_ip is None:
                 logger.warning(
-                    f"Failed to find prioritised connection IP between {node_id} and {other_node.node_id}"
+                    f"Failed to find prioritised connection IP between {node_id} and {other_node}"
                 )
                 raise ValueError(
                     "MLX ring backend requires connectivity between neighbouring nodes"
@@ -375,31 +343,30 @@ def get_mlx_ring_hosts_by_node(
 
 
 def get_mlx_jaccl_coordinators(
-    selected_cycle: list[NodeInfo],
+    coordinator: NodeId,
     coordinator_port: int,
     cycle_digraph: Topology,
 ) -> dict[NodeId, str]:
-    """Get the coordinator addresses for MLX Jaccl (rank 0 device).
+    """Get the coordinator addresses for MLX JACCL (rank 0 device).
 
     Select an IP address that each node can reach for the rank 0 node. Returns
     address in format "X.X.X.X:PORT" per node.
     """
-    rank_0_node = selected_cycle[0]
-    logger.debug(f"Selecting coordinator from rank 0 node: {rank_0_node.node_id}")
+    selected_cycle = list(cycle_digraph.list_nodes())
+    logger.info(f"Selecting coordinator: {coordinator}")
 
-    def get_ip_for_node(n: NodeInfo) -> str:
-        if n.node_id == rank_0_node.node_id:
+    def get_ip_for_node(n: NodeId) -> str:
+        if n == coordinator:
             return "0.0.0.0"
 
-        ip = _find_ip_prioritised(n, rank_0_node, cycle_digraph)
-        if ip:
+        for ip, _ in _find_connection_ip(n, coordinator, cycle_digraph):
             return ip
 
         logger.warning(
-            f"Failed to find directly connected ip between {n.node_id} and {rank_0_node.node_id}"
+            f"Failed to find directly connected ip between {n} and {coordinator}"
+        )
+        raise ValueError(
+            "Current jaccl backend requires all participating devices to be able to communicate"
         )
-        raise ValueError("Current ibv backend requires all-to-all rdma connections")
 
-    return {
-        n.node_id: f"{get_ip_for_node(n)}:{coordinator_port}" for n in selected_cycle
-    }
+    return {n: f"{get_ip_for_node(n)}:{coordinator_port}" for n in selected_cycle}

src/exo/master/tests/conftest.py

@@ -1,67 +1,36 @@
-from typing import Callable
-
-import pytest
-
-from exo.shared.types.common import NodeId
 from exo.shared.types.multiaddr import Multiaddr
 from exo.shared.types.profiling import (
-    MemoryPerformanceProfile,
+    MemoryUsage,
     NodePerformanceProfile,
     SystemPerformanceProfile,
 )
-from exo.shared.types.topology import Connection, ConnectionProfile, NodeInfo
+from exo.shared.types.topology import RDMAConnection, SocketConnection
 
 
-@pytest.fixture
-def create_node():
-    def _create_node(memory: int, node_id: NodeId | None = None) -> NodeInfo:
-        if node_id is None:
-            node_id = NodeId()
-        return NodeInfo(
-            node_id=node_id,
-            node_profile=NodePerformanceProfile(
-                model_id="test",
-                chip_id="test",
-                friendly_name="test",
-                memory=MemoryPerformanceProfile.from_bytes(
-                    ram_total=1000,
-                    ram_available=memory,
-                    swap_total=1000,
-                    swap_available=1000,
-                ),
-                network_interfaces=[],
-                system=SystemPerformanceProfile(),
-            ),
-        )
-
-    return _create_node
+def create_node_profile(memory: int) -> NodePerformanceProfile:
+    return NodePerformanceProfile(
+        model_id="test",
+        chip_id="test",
+        friendly_name="test",
+        memory=MemoryUsage.from_bytes(
+            ram_total=1000,
+            ram_available=memory,
+            swap_total=1000,
+            swap_available=1000,
+        ),
+        network_interfaces=[],
+        system=SystemPerformanceProfile(),
+    )
 
 
 # TODO: this is a hack to get the port for the send_back_multiaddr
-@pytest.fixture
-def create_connection() -> Callable[[NodeId, NodeId, int | None], Connection]:
-    port_counter = 1235
-    ip_counter = 1
+def create_connection(ip: int, sink_port: int = 1234) -> SocketConnection:
+    return SocketConnection(
+        sink_multiaddr=Multiaddr(address=f"/ip4/169.254.0.{ip}/tcp/{sink_port}"),
+    )
 
-    def _create_connection(
-        source_node_id: NodeId, sink_node_id: NodeId, send_back_port: int | None = None
-    ) -> Connection:
-        nonlocal port_counter
-        nonlocal ip_counter
-        # assign unique ips
-        ip_counter += 1
-        if send_back_port is None:
-            send_back_port = port_counter
-            port_counter += 1
-        return Connection(
-            local_node_id=source_node_id,
-            send_back_node_id=sink_node_id,
-            send_back_multiaddr=Multiaddr(
-                address=f"/ip4/169.254.0.{ip_counter}/tcp/{send_back_port}"
-            ),
-            connection_profile=ConnectionProfile(
-                throughput=1000, latency=1000, jitter=1000
-            ),
-        )
 
-    return _create_connection
+def create_rdma_connection(iface: int) -> RDMAConnection:
+    return RDMAConnection(
+        source_rdma_iface=f"rdma_en{iface}", sink_rdma_iface=f"rdma_en{iface}"
+    )

src/exo/master/tests/test_master.py

@@ -19,15 +19,13 @@ from exo.shared.types.events import (
     ForwarderEvent,
     IndexedEvent,
     InstanceCreated,
-    NodePerformanceMeasured,
+    NodeGatheredInfo,
     TaskCreated,
 )
 from exo.shared.types.memory import Memory
 from exo.shared.types.models import ModelId, ModelMetadata
 from exo.shared.types.profiling import (
-    MemoryPerformanceProfile,
-    NodePerformanceProfile,
-    SystemPerformanceProfile,
+    MemoryUsage,
 )
 from exo.shared.types.tasks import ChatCompletion as ChatCompletionTask
 from exo.shared.types.tasks import TaskStatus
@@ -83,21 +81,14 @@ async def test_master():
                 origin=sender_node_id,
                 session=session_id,
                 event=(
-                    NodePerformanceMeasured(
+                    NodeGatheredInfo(
                         when=str(datetime.now(tz=timezone.utc)),
                         node_id=node_id,
-                        node_profile=NodePerformanceProfile(
-                            model_id="maccy",
-                            chip_id="arm",
-                            friendly_name="test",
-                            memory=MemoryPerformanceProfile(
-                                ram_total=Memory.from_bytes(678948 * 1024),
-                                ram_available=Memory.from_bytes(678948 * 1024),
-                                swap_total=Memory.from_bytes(0),
-                                swap_available=Memory.from_bytes(0),
-                            ),
-                            network_interfaces=[],
-                            system=SystemPerformanceProfile(),
+                        info=MemoryUsage(
+                            ram_total=Memory.from_bytes(678948 * 1024),
+                            ram_available=Memory.from_bytes(678948 * 1024),
+                            swap_total=Memory.from_bytes(0),
+                            swap_available=Memory.from_bytes(0),
                         ),
                     )
                 ),
@@ -163,7 +154,7 @@ async def test_master():
         assert events[0].idx == 0
         assert events[1].idx == 1
         assert events[2].idx == 2
-        assert isinstance(events[0].event, NodePerformanceMeasured)
+        assert isinstance(events[0].event, NodeGatheredInfo)
         assert isinstance(events[1].event, InstanceCreated)
         created_instance = events[1].event.instance
         assert isinstance(created_instance, MlxRingInstance)

src/exo/master/tests/test_placement.py

@@ -1,5 +1,3 @@
-from typing import Callable
-
 import pytest
 from loguru import logger
 
@@ -7,14 +5,20 @@ from exo.master.placement import (
     get_transition_events,
     place_instance,
 )
+from exo.master.tests.conftest import (
+    create_connection,
+    create_node_profile,
+    create_rdma_connection,
+)
 from exo.shared.topology import Topology
 from exo.shared.types.commands import PlaceInstance
 from exo.shared.types.common import CommandId, NodeId
 from exo.shared.types.events import InstanceCreated, InstanceDeleted
 from exo.shared.types.memory import Memory
 from exo.shared.types.models import ModelId, ModelMetadata
-from exo.shared.types.profiling import NetworkInterfaceInfo, NodePerformanceProfile
-from exo.shared.types.topology import Connection, NodeInfo
+from exo.shared.types.multiaddr import Multiaddr
+from exo.shared.types.profiling import NetworkInterfaceInfo
+from exo.shared.types.topology import SocketConnection
 from exo.shared.types.worker.instances import (
     Instance,
     InstanceId,
@@ -26,11 +30,6 @@ from exo.shared.types.worker.runners import ShardAssignments
 from exo.shared.types.worker.shards import Sharding
 
 
-@pytest.fixture
-def topology() -> Topology:
-    return Topology()
-
-
 @pytest.fixture
 def instance() -> Instance:
     return MlxRingInstance(
@@ -77,34 +76,36 @@ def test_get_instance_placements_create_instance(
     available_memory: tuple[int, int, int],
     total_layers: int,
     expected_layers: tuple[int, int, int],
-    topology: Topology,
     model_meta: ModelMetadata,
-    create_node: Callable[[int, NodeId | None], NodeInfo],
-    create_connection: Callable[[NodeId, NodeId], Connection],
 ):
     # arrange
     model_meta.n_layers = total_layers
     model_meta.storage_size.in_bytes = sum(
         available_memory
     )  # make it exactly fit across all nodes
+    topology = Topology()
 
     cic = place_instance_command(model_meta)
     node_id_a = NodeId()
     node_id_b = NodeId()
     node_id_c = NodeId()
-    topology.add_node(create_node(available_memory[0], node_id_a))
-    topology.add_node(create_node(available_memory[1], node_id_b))
-    topology.add_node(create_node(available_memory[2], node_id_c))
-    # Add bidirectional connections for ring topology
-    topology.add_connection(create_connection(node_id_a, node_id_b))
-    topology.add_connection(create_connection(node_id_b, node_id_a))
-    topology.add_connection(create_connection(node_id_b, node_id_c))
-    topology.add_connection(create_connection(node_id_c, node_id_b))
-    topology.add_connection(create_connection(node_id_c, node_id_a))
-    topology.add_connection(create_connection(node_id_a, node_id_c))
+    profiles = {
+        node_id_a: create_node_profile(available_memory[0]),
+        node_id_b: create_node_profile(available_memory[1]),
+        node_id_c: create_node_profile(available_memory[2]),
+    }
+    topology.add_node(node_id_a)
+    topology.add_node(node_id_b)
+    topology.add_node(node_id_c)
+    topology.add_connection(node_id_a, node_id_b, create_connection(1))
+    topology.add_connection(node_id_b, node_id_c, create_connection(2))
+    topology.add_connection(node_id_c, node_id_a, create_connection(3))
+    topology.add_connection(node_id_c, node_id_b, create_connection(4))
+    topology.add_connection(node_id_a, node_id_c, create_connection(5))
+    topology.add_connection(node_id_b, node_id_a, create_connection(6))
 
     # act
-    placements = place_instance(cic, topology, {})
+    placements = place_instance(cic, topology, {}, profiles)
 
     # assert
     assert len(placements) == 1
@@ -130,12 +131,11 @@ def test_get_instance_placements_create_instance(
     assert shards_sorted[-1].end_layer == total_layers
 
 
-def test_get_instance_placements_one_node_exact_fit(
-    create_node: Callable[[int, NodeId | None], NodeInfo],
-) -> None:
+def test_get_instance_placements_one_node_exact_fit() -> None:
     topology = Topology()
     node_id = NodeId()
-    topology.add_node(create_node(1000 * 1024, node_id))
+    topology.add_node(node_id)
+    profiles = {node_id: create_node_profile(1000 * 1024)}
     cic = place_instance_command(
         ModelMetadata(
             model_id=ModelId("test-model"),
@@ -146,7 +146,7 @@ def test_get_instance_placements_one_node_exact_fit(
             supports_tensor=True,
         ),
     )
-    placements = place_instance(cic, topology, {})
+    placements = place_instance(cic, topology, {}, profiles)
 
     assert len(placements) == 1
     instance_id = list(placements.keys())[0]
@@ -157,12 +157,11 @@ def test_get_instance_placements_one_node_exact_fit(
     assert len(instance.shard_assignments.runner_to_shard) == 1
 
 
-def test_get_instance_placements_one_node_fits_with_extra_memory(
-    create_node: Callable[[int, NodeId | None], NodeInfo],
-) -> None:
+def test_get_instance_placements_one_node_fits_with_extra_memory() -> None:
     topology = Topology()
     node_id = NodeId()
-    topology.add_node(create_node(1001 * 1024, node_id))
+    topology.add_node(node_id)
+    profiles = {node_id: create_node_profile(1001 * 1024)}
     cic = place_instance_command(
         ModelMetadata(
             model_id=ModelId("test-model"),
@@ -173,7 +172,7 @@ def test_get_instance_placements_one_node_fits_with_extra_memory(
             supports_tensor=True,
         ),
     )
-    placements = place_instance(cic, topology, {})
+    placements = place_instance(cic, topology, {}, profiles)
 
     assert len(placements) == 1
     instance_id = list(placements.keys())[0]
@@ -184,12 +183,11 @@ def test_get_instance_placements_one_node_fits_with_extra_memory(
     assert len(instance.shard_assignments.runner_to_shard) == 1
 
 
-def test_get_instance_placements_one_node_not_fit(
-    create_node: Callable[[int, NodeId | None], NodeInfo],
-) -> None:
+def test_get_instance_placements_one_node_not_fit() -> None:
     topology = Topology()
     node_id = NodeId()
-    topology.add_node(create_node(1000 * 1024, node_id))
+    topology.add_node(node_id)
+    profiles = {node_id: create_node_profile(1000 * 1024)}
     cic = place_instance_command(
         model_meta=ModelMetadata(
             model_id=ModelId("test-model"),
@@ -202,7 +200,7 @@ def test_get_instance_placements_one_node_not_fit(
     )
 
     with pytest.raises(ValueError, match="No cycles found with sufficient memory"):
-        place_instance(cic, topology, {})
+        place_instance(cic, topology, {}, profiles)
 
 
 def test_get_transition_events_no_change(instance: Instance):
@@ -247,179 +245,103 @@ def test_get_transition_events_delete_instance(instance: Instance):
     assert events[0].instance_id == instance_id
 
 
-def test_placement_selects_cycle_with_most_memory(
-    topology: Topology,
+def test_placement_selects_leaf_nodes(
     model_meta: ModelMetadata,
-    create_node: Callable[[int, NodeId | None], NodeInfo],
-    create_connection: Callable[[NodeId, NodeId], Connection],
 ):
-    # Arrange two 3-node cycles with different total memory.
-    # With bidirectional connections for ring topology, both cycles have non-leaf nodes.
-    # The algorithm should select the cycle with the most available memory.
+    # arrange
+    topology = Topology()
 
-    # Model requires more than any single node but fits within a 3-node cycle
-    model_meta.storage_size.in_bytes = 1500
-    model_meta.n_layers = 12
+    model_meta.storage_size = Memory.from_bytes(1000)
 
-    # Create node ids
     node_id_a = NodeId()
     node_id_b = NodeId()
     node_id_c = NodeId()
     node_id_d = NodeId()
-    node_id_e = NodeId()
-    node_id_f = NodeId()
 
-    # A-B-C cycle total memory = 1600 (< D-E-F total)
-    topology.add_node(create_node(400, node_id_a))
-    topology.add_node(create_node(400, node_id_b))
-    topology.add_node(create_node(800, node_id_c))
+    profiles = {
+        node_id_a: create_node_profile(500),
+        node_id_b: create_node_profile(600),
+        node_id_c: create_node_profile(600),
+        node_id_d: create_node_profile(500),
+    }
 
-    # D-E-F cycle total memory = 1800 (> A-B-C total)
-    topology.add_node(create_node(600, node_id_d))
-    topology.add_node(create_node(600, node_id_e))
-    topology.add_node(create_node(600, node_id_f))
+    topology.add_node(node_id_a)
+    topology.add_node(node_id_b)
+    topology.add_node(node_id_c)
+    topology.add_node(node_id_d)
 
-    # Build bidirectional cycles for ring topology
-    topology.add_connection(create_connection(node_id_a, node_id_b))
-    topology.add_connection(create_connection(node_id_b, node_id_a))
-    topology.add_connection(create_connection(node_id_b, node_id_c))
-    topology.add_connection(create_connection(node_id_c, node_id_b))
-    topology.add_connection(create_connection(node_id_c, node_id_a))
-    topology.add_connection(create_connection(node_id_a, node_id_c))
+    # Daisy chain topology
+    topology.add_connection(node_id_a, node_id_b, create_connection(1))
+    topology.add_connection(node_id_b, node_id_a, create_connection(1))
+    topology.add_connection(node_id_b, node_id_c, create_connection(1))
+    topology.add_connection(node_id_c, node_id_b, create_connection(1))
+    topology.add_connection(node_id_c, node_id_d, create_connection(1))
+    topology.add_connection(node_id_d, node_id_c, create_connection(1))
 
-    topology.add_connection(create_connection(node_id_d, node_id_e))
-    topology.add_connection(create_connection(node_id_e, node_id_d))
-    topology.add_connection(create_connection(node_id_e, node_id_f))
-    topology.add_connection(create_connection(node_id_f, node_id_e))
-    topology.add_connection(create_connection(node_id_f, node_id_d))
-    topology.add_connection(create_connection(node_id_d, node_id_f))
+    logger.info(list(topology.list_connections()))
 
     cic = place_instance_command(
         model_meta=model_meta,
     )
 
-    # Act
-    placements = place_instance(cic, topology, {})
+    # act
+    placements = place_instance(cic, topology, {}, profiles)
 
-    # Assert: D-E-F cycle should be selected as it has more total memory
+    # assert
     assert len(placements) == 1
-    instance_id = list(placements.keys())[0]
-    instance = placements[instance_id]
+    instance = list(placements.values())[0]
 
     assigned_nodes = set(instance.shard_assignments.node_to_runner.keys())
-    less_memory_cycle_nodes = {node_id_a, node_id_b, node_id_c}
-    more_memory_cycle_nodes = {node_id_d, node_id_e, node_id_f}
-
-    assert more_memory_cycle_nodes.issubset(assigned_nodes)
-    assert assigned_nodes.isdisjoint(less_memory_cycle_nodes)
+    assert assigned_nodes == set((node_id_a, node_id_b)) or assigned_nodes == set(
+        (node_id_c, node_id_d)
+    )
 
 
 def test_tensor_rdma_backend_connectivity_matrix(
-    topology: Topology,
     model_meta: ModelMetadata,
-    create_node: Callable[[int, NodeId | None], NodeInfo],
-    create_connection: Callable[[NodeId, NodeId], Connection],
 ):
+    topology = Topology()
     model_meta.n_layers = 12
     model_meta.storage_size.in_bytes = 1500
 
-    node_id_a = NodeId()
-    node_id_b = NodeId()
-    node_id_c = NodeId()
+    node_a = NodeId()
+    node_b = NodeId()
+    node_c = NodeId()
 
-    node_a = create_node(500, node_id_a)
-    node_b = create_node(500, node_id_b)
-    node_c = create_node(500, node_id_c)
+    profiles = {
+        node_a: create_node_profile(500),
+        node_b: create_node_profile(500),
+        node_c: create_node_profile(500),
+    }
 
     ethernet_interface = NetworkInterfaceInfo(
         name="en0",
         ip_address="192.168.1.100",
     )
-
-    assert node_a.node_profile is not None
-    assert node_b.node_profile is not None
-    assert node_c.node_profile is not None
-
-    conn_a_b = create_connection(node_id_a, node_id_b)
-    conn_b_c = create_connection(node_id_b, node_id_c)
-    conn_c_a = create_connection(node_id_c, node_id_a)
-
-    conn_b_a = create_connection(node_id_b, node_id_a)
-    conn_c_b = create_connection(node_id_c, node_id_b)
-    conn_a_c = create_connection(node_id_a, node_id_c)
-
-    assert conn_a_b.send_back_multiaddr is not None
-    assert conn_b_c.send_back_multiaddr is not None
-    assert conn_c_a.send_back_multiaddr is not None
-
-    assert conn_b_a.send_back_multiaddr is not None
-    assert conn_c_b.send_back_multiaddr is not None
-    assert conn_a_c.send_back_multiaddr is not None
-
-    node_a.node_profile = NodePerformanceProfile(
-        model_id="test",
-        chip_id="test",
-        friendly_name="test",
-        memory=node_a.node_profile.memory,
-        network_interfaces=[
-            NetworkInterfaceInfo(
-                name="en3",
-                ip_address=conn_c_a.send_back_multiaddr.ip_address,
-            ),
-            NetworkInterfaceInfo(
-                name="en4",
-                ip_address=conn_b_a.send_back_multiaddr.ip_address,
-            ),
-            ethernet_interface,
-        ],
-        system=node_a.node_profile.system,
-    )
-    node_b.node_profile = NodePerformanceProfile(
-        model_id="test",
-        chip_id="test",
-        friendly_name="test",
-        memory=node_b.node_profile.memory,
-        network_interfaces=[
-            NetworkInterfaceInfo(
-                name="en3",
-                ip_address=conn_c_b.send_back_multiaddr.ip_address,
-            ),
-            NetworkInterfaceInfo(
-                name="en4",
-                ip_address=conn_a_b.send_back_multiaddr.ip_address,
-            ),
-            ethernet_interface,
-        ],
-        system=node_b.node_profile.system,
-    )
-    node_c.node_profile = NodePerformanceProfile(
-        model_id="test",
-        chip_id="test",
-        friendly_name="test",
-        memory=node_c.node_profile.memory,
-        network_interfaces=[
-            NetworkInterfaceInfo(
-                name="en3",
-                ip_address=conn_a_c.send_back_multiaddr.ip_address,
-            ),
-            NetworkInterfaceInfo(
-                name="en4",
-                ip_address=conn_b_c.send_back_multiaddr.ip_address,
-            ),
-            ethernet_interface,
-        ],
-        system=node_c.node_profile.system,
+    ethernet_conn = SocketConnection(
+        sink_multiaddr=Multiaddr(address=f"/ip4/192.168.1.{100}/tcp/{8000}")
     )
 
+    profiles[node_a].network_interfaces = [ethernet_interface]
+    profiles[node_b].network_interfaces = [ethernet_interface]
+    profiles[node_c].network_interfaces = [ethernet_interface]
+
     topology.add_node(node_a)
     topology.add_node(node_b)
     topology.add_node(node_c)
-    topology.add_connection(conn_a_b)
-    topology.add_connection(conn_b_c)
-    topology.add_connection(conn_c_a)
-    topology.add_connection(conn_b_a)
-    topology.add_connection(conn_c_b)
-    topology.add_connection(conn_a_c)
+    topology.add_connection(node_a, node_b, create_rdma_connection(3))
+    topology.add_connection(node_b, node_c, create_rdma_connection(4))
+    topology.add_connection(node_c, node_a, create_rdma_connection(5))
+    topology.add_connection(node_b, node_a, create_rdma_connection(3))
+    topology.add_connection(node_c, node_b, create_rdma_connection(4))
+    topology.add_connection(node_a, node_c, create_rdma_connection(5))
+
+    topology.add_connection(node_a, node_b, ethernet_conn)
+    topology.add_connection(node_b, node_c, ethernet_conn)
+    topology.add_connection(node_c, node_a, ethernet_conn)
+    topology.add_connection(node_a, node_c, ethernet_conn)
+    topology.add_connection(node_b, node_a, ethernet_conn)
+    topology.add_connection(node_c, node_b, ethernet_conn)
 
     cic = PlaceInstance(
         sharding=Sharding.Tensor,
@@ -429,7 +351,7 @@ def test_tensor_rdma_backend_connectivity_matrix(
         min_nodes=1,
     )
 
-    placements = place_instance(cic, topology, {})
+    placements = place_instance(cic, topology, {}, profiles)
 
     assert len(placements) == 1
     instance_id = list(placements.keys())[0]
@@ -437,10 +359,10 @@ def test_tensor_rdma_backend_connectivity_matrix(
 
     assert isinstance(instance, MlxJacclInstance)
 
-    assert instance.ibv_devices is not None
+    assert instance.jaccl_devices is not None
     assert instance.jaccl_coordinators is not None
 
-    matrix = instance.ibv_devices
+    matrix = instance.jaccl_devices
     assert len(matrix) == 3
 
     for i in range(3):
@@ -449,15 +371,15 @@ def test_tensor_rdma_backend_connectivity_matrix(
     assigned_nodes = list(instance.shard_assignments.node_to_runner.keys())
     node_to_idx = {node_id: idx for idx, node_id in enumerate(assigned_nodes)}
 
-    idx_a = node_to_idx[node_id_a]
-    idx_b = node_to_idx[node_id_b]
-    idx_c = node_to_idx[node_id_c]
+    idx_a = node_to_idx[node_a]
+    idx_b = node_to_idx[node_b]
+    idx_c = node_to_idx[node_c]
 
     logger.info(matrix)
 
-    assert matrix[idx_a][idx_b] == "rdma_en4"
-    assert matrix[idx_b][idx_c] == "rdma_en3"
-    assert matrix[idx_c][idx_a] == "rdma_en3"
+    assert matrix[idx_a][idx_b] == "rdma_en3"
+    assert matrix[idx_b][idx_c] == "rdma_en4"
+    assert matrix[idx_c][idx_a] == "rdma_en5"
 
     # Verify coordinators are set for all nodes
     assert len(instance.jaccl_coordinators) == 3

src/exo/master/tests/test_placement_utils.py

@@ -1,56 +1,48 @@
-from typing import Callable
-
 import pytest
 
 from exo.master.placement_utils import (
+    NodeWithProfile,
     filter_cycles_by_memory,
     get_hosts_from_subgraph,
     get_mlx_jaccl_coordinators,
     get_shard_assignments,
     get_smallest_cycles,
 )
+from exo.master.tests.conftest import create_connection, create_node_profile
 from exo.shared.topology import Topology
 from exo.shared.types.common import Host, NodeId
 from exo.shared.types.memory import Memory
 from exo.shared.types.models import ModelId, ModelMetadata
-from exo.shared.types.profiling import NetworkInterfaceInfo, NodePerformanceProfile
-from exo.shared.types.topology import Connection, NodeInfo
 from exo.shared.types.worker.shards import Sharding
 
 
-@pytest.fixture
-def topology() -> Topology:
-    topology = Topology()
-    return topology
-
-
-def test_filter_cycles_by_memory(
-    topology: Topology,
-    create_node: Callable[[int, NodeId | None], NodeInfo],
-    create_connection: Callable[[NodeId, NodeId], Connection],
-):
+def test_filter_cycles_by_memory():
     # arrange
     node1_id = NodeId()
     node2_id = NodeId()
+    topology = Topology()
 
-    node1 = create_node(1000 * 1024, node1_id)
-    node2 = create_node(1000 * 1024, node2_id)
+    node1 = create_node_profile(1000 * 1024)
+    node2 = create_node_profile(1000 * 1024)
+    node_profiles = {node1_id: node1, node2_id: node2}
 
-    topology.add_node(node1)
-    topology.add_node(node2)
+    topology.add_node(node1_id)
+    topology.add_node(node2_id)
 
-    connection1 = create_connection(node1_id, node2_id)
-    connection2 = create_connection(node2_id, node1_id)
+    connection1 = create_connection(1)
+    connection2 = create_connection(2)
 
-    topology.add_connection(connection1)
-    topology.add_connection(connection2)
+    topology.add_connection(node1_id, node2_id, connection1)
+    topology.add_connection(node2_id, node1_id, connection2)
 
     cycles = topology.get_cycles()
     assert len(cycles) == 1
     assert len(cycles[0]) == 2
 
     # act
-    filtered_cycles = filter_cycles_by_memory(cycles, Memory.from_bytes(1))
+    filtered_cycles = filter_cycles_by_memory(
+        cycles, node_profiles, Memory.from_bytes(1)
+    )
 
     # assert
     assert len(filtered_cycles) == 1
@@ -58,64 +50,65 @@ def test_filter_cycles_by_memory(
     assert set(n.node_id for n in filtered_cycles[0]) == {node1_id, node2_id}
 
 
-def test_filter_cycles_by_insufficient_memory(
-    topology: Topology,
-    create_node: Callable[[int, NodeId | None], NodeInfo],
-    create_connection: Callable[[NodeId, NodeId], Connection],
-):
+def test_filter_cycles_by_insufficient_memory():
     # arrange
     node1_id = NodeId()
     node2_id = NodeId()
+    topology = Topology()
 
-    node1 = create_node(1000 * 1024, node1_id)
-    node2 = create_node(1000 * 1024, node2_id)
+    node1 = create_node_profile(1000 * 1024)
+    node2 = create_node_profile(1000 * 1024)
+    node_profiles = {node1_id: node1, node2_id: node2}
 
-    topology.add_node(node1)
-    topology.add_node(node2)
+    topology.add_node(node1_id)
+    topology.add_node(node2_id)
 
-    connection1 = create_connection(node1_id, node2_id)
-    connection2 = create_connection(node2_id, node1_id)
+    connection1 = create_connection(1)
+    connection2 = create_connection(2)
 
-    topology.add_connection(connection1)
-    topology.add_connection(connection2)
+    topology.add_connection(node1_id, node2_id, connection1)
+    topology.add_connection(node2_id, node1_id, connection2)
 
     # act
     filtered_cycles = filter_cycles_by_memory(
-        topology.get_cycles(), Memory.from_kb(2001)
+        topology.get_cycles(), node_profiles, Memory.from_kb(2001)
     )
 
     # assert
     assert len(filtered_cycles) == 0
 
 
-def test_filter_multiple_cycles_by_memory(
-    topology: Topology,
-    create_node: Callable[[int, NodeId | None], NodeInfo],
-    create_connection: Callable[[NodeId, NodeId], Connection],
-):
+def test_filter_multiple_cycles_by_memory():
     # arrange
     node_a_id = NodeId()
     node_b_id = NodeId()
     node_c_id = NodeId()
+    topology = Topology()
 
-    node_a = create_node(500 * 1024, node_a_id)
-    node_b = create_node(500 * 1024, node_b_id)
-    node_c = create_node(1000 * 1024, node_c_id)
+    node_a = create_node_profile(500 * 1024)
+    node_b = create_node_profile(500 * 1024)
+    node_c = create_node_profile(1000 * 1024)
+    node_profiles = {
+        node_a_id: node_a,
+        node_b_id: node_b,
+        node_c_id: node_c,
+    }
 
-    topology.add_node(node_a)
-    topology.add_node(node_b)
-    topology.add_node(node_c)
+    topology.add_node(node_a_id)
+    topology.add_node(node_b_id)
+    topology.add_node(node_c_id)
 
-    topology.add_connection(create_connection(node_a_id, node_b_id))
-    topology.add_connection(create_connection(node_b_id, node_a_id))
-
-    topology.add_connection(create_connection(node_a_id, node_c_id))
-    topology.add_connection(create_connection(node_c_id, node_b_id))
+    topology.add_connection(node_a_id, node_b_id, create_connection(1))
+    topology.add_connection(node_b_id, node_a_id, create_connection(2))
+    topology.add_connection(node_a_id, node_c_id, create_connection(3))
+    topology.add_connection(node_c_id, node_b_id, create_connection(4))
 
     cycles = topology.get_cycles()
 
     # act
-    filtered_cycles = filter_cycles_by_memory(cycles, Memory.from_kb(1500))
+    filtered_cycles = filter_cycles_by_memory(
+        cycles, node_profiles, Memory.from_kb(1500)
+    )
 
     # assert
     assert len(filtered_cycles) == 1
@@ -127,31 +120,38 @@ def test_filter_multiple_cycles_by_memory(
     }
 
 
-def test_get_smallest_cycles(
-    topology: Topology,
-    create_node: Callable[[int, NodeId | None], NodeInfo],
-    create_connection: Callable[[NodeId, NodeId], Connection],
-):
+def test_get_smallest_cycles():
     # arrange
     node_a_id = NodeId()
     node_b_id = NodeId()
     node_c_id = NodeId()
+    topology = Topology()
 
-    node_a = create_node(500 * 1024, node_a_id)
-    node_b = create_node(500 * 1024, node_b_id)
-    node_c = create_node(1000 * 1024, node_c_id)
+    node_a = create_node_profile(500 * 1024)
+    node_b = create_node_profile(500 * 1024)
+    node_c = create_node_profile(1000 * 1024)
+    node_profiles = {
+        node_a_id: node_a,
+        node_b_id: node_b,
+        node_c_id: node_c,
+    }
 
-    topology.add_node(node_a)
-    topology.add_node(node_b)
-    topology.add_node(node_c)
+    topology.add_node(node_a_id)
+    topology.add_node(node_b_id)
+    topology.add_node(node_c_id)
 
-    topology.add_connection(create_connection(node_a_id, node_b_id))
-    topology.add_connection(create_connection(node_b_id, node_c_id))
-    topology.add_connection(create_connection(node_c_id, node_a_id))
-    topology.add_connection(create_connection(node_b_id, node_a_id))
+    topology.add_connection(node_a_id, node_b_id, create_connection(1))
+    topology.add_connection(node_b_id, node_a_id, create_connection(2))
+    topology.add_connection(node_a_id, node_c_id, create_connection(3))
+    topology.add_connection(node_c_id, node_b_id, create_connection(4))
+
+    cycles = [
+        [NodeWithProfile(node_id=nid, node_profile=node_profiles[nid]) for nid in cycle]
+        for cycle in topology.get_cycles()
+    ]
 
     # act
-    smallest_cycles = get_smallest_cycles(topology.get_cycles())
+    smallest_cycles = get_smallest_cycles(cycles)
 
     # assert
     assert len(smallest_cycles) == 1
@@ -168,9 +168,6 @@ def test_get_smallest_cycles(
     ],
 )
 def test_get_shard_assignments(
-    topology: Topology,
-    create_node: Callable[[int, NodeId | None], NodeInfo],
-    create_connection: Callable[[NodeId, NodeId], Connection],
     available_memory: tuple[int, int, int],
     total_layers: int,
     expected_layers: tuple[int, int, int],
@@ -179,19 +176,25 @@ def test_get_shard_assignments(
     node_a_id = NodeId()
     node_b_id = NodeId()
     node_c_id = NodeId()
+    topology = Topology()
 
-    node_a = create_node(available_memory[0] * 1024, node_a_id)
-    node_b = create_node(available_memory[1] * 1024, node_b_id)
-    node_c = create_node(available_memory[2] * 1024, node_c_id)
+    node_a = create_node_profile(available_memory[0] * 1024)
+    node_b = create_node_profile(available_memory[1] * 1024)
+    node_c = create_node_profile(available_memory[2] * 1024)
+    node_profiles = {
+        node_a_id: node_a,
+        node_b_id: node_b,
+        node_c_id: node_c,
+    }
 
-    topology.add_node(node_a)
-    topology.add_node(node_b)
-    topology.add_node(node_c)
+    topology.add_node(node_a_id)
+    topology.add_node(node_b_id)
+    topology.add_node(node_c_id)
 
-    topology.add_connection(create_connection(node_a_id, node_b_id))
-    topology.add_connection(create_connection(node_b_id, node_c_id))
-    topology.add_connection(create_connection(node_c_id, node_a_id))
-    topology.add_connection(create_connection(node_b_id, node_a_id))
+    topology.add_connection(node_a_id, node_b_id, create_connection(1))
+    topology.add_connection(node_b_id, node_c_id, create_connection(2))
+    topology.add_connection(node_c_id, node_a_id, create_connection(3))
+    topology.add_connection(node_b_id, node_a_id, create_connection(4))
 
     model_meta = ModelMetadata(
         model_id=ModelId("test-model"),
@@ -201,7 +204,11 @@ def test_get_shard_assignments(
         hidden_size=1000,
         supports_tensor=True,
     )
-    cycles = topology.get_cycles()
+
+    cycles = [
+        [NodeWithProfile(node_id=nid, node_profile=node_profiles[nid]) for nid in cycle]
+        for cycle in topology.get_cycles()
+    ]
     selected_cycle = cycles[0]
 
     # act
@@ -230,28 +237,21 @@ def test_get_shard_assignments(
     )
 
 
-def test_get_hosts_from_subgraph(
-    topology: Topology,
-    create_node: Callable[[int, NodeId | None], NodeInfo],
-    create_connection: Callable[[NodeId, NodeId, int | None], Connection],
-):
+def test_get_hosts_from_subgraph():
     # arrange
     node_a_id = NodeId()
     node_b_id = NodeId()
     node_c_id = NodeId()
+    topology = Topology()
 
-    node_a = create_node(500, node_a_id)
-    node_b = create_node(500, node_b_id)
-    node_c = create_node(1000, node_c_id)
+    topology.add_node(node_a_id)
+    topology.add_node(node_b_id)
+    topology.add_node(node_c_id)
 
-    topology.add_node(node_a)
-    topology.add_node(node_b)
-    topology.add_node(node_c)
-
-    topology.add_connection(create_connection(node_a_id, node_b_id, 5001))
-    topology.add_connection(create_connection(node_b_id, node_c_id, 5002))
-    topology.add_connection(create_connection(node_c_id, node_a_id, 5003))
-    topology.add_connection(create_connection(node_b_id, node_a_id, 5004))
+    topology.add_connection(node_a_id, node_b_id, create_connection(1))
+    topology.add_connection(node_b_id, node_a_id, create_connection(2))
+    topology.add_connection(node_a_id, node_c_id, create_connection(3))
+    topology.add_connection(node_c_id, node_b_id, create_connection(4))
 
     # act
     hosts = get_hosts_from_subgraph(topology)
@@ -259,108 +259,47 @@ def test_get_hosts_from_subgraph(
     # assert
     assert len(hosts) == 3
     expected_hosts = [
-        Host(ip=("169.254.0.2"), port=5001),
-        Host(ip=("169.254.0.3"), port=5002),
-        Host(ip=("169.254.0.4"), port=5003),
+        Host(ip=("169.254.0.2"), port=1234),
+        Host(ip=("169.254.0.3"), port=1234),
+        Host(ip=("169.254.0.4"), port=1234),
     ]
     for expected_host in expected_hosts:
         assert expected_host in hosts
 
 
-def test_get_mlx_jaccl_coordinators(
-    topology: Topology,
-    create_node: Callable[[int, NodeId | None], NodeInfo],
-    create_connection: Callable[[NodeId, NodeId, int | None], Connection],
-):
+def test_get_mlx_jaccl_coordinators():
     # arrange
     node_a_id = NodeId()
     node_b_id = NodeId()
     node_c_id = NodeId()
+    topology = Topology()
 
-    node_a = create_node(500 * 1024, node_a_id)
-    node_b = create_node(500 * 1024, node_b_id)
-    node_c = create_node(1000 * 1024, node_c_id)
+    topology.add_node(node_a_id)
+    topology.add_node(node_b_id)
+    topology.add_node(node_c_id)
 
-    conn_a_b = create_connection(node_a_id, node_b_id, 5001)
-    conn_b_a = create_connection(node_b_id, node_a_id, 5002)
-    conn_b_c = create_connection(node_b_id, node_c_id, 5003)
-    conn_c_b = create_connection(node_c_id, node_b_id, 5004)
-    conn_c_a = create_connection(node_c_id, node_a_id, 5005)
-    conn_a_c = create_connection(node_a_id, node_c_id, 5006)
+    topology.add_connection(node_a_id, node_b_id, create_connection(1))
+    topology.add_connection(node_b_id, node_a_id, create_connection(2))
+    topology.add_connection(node_a_id, node_c_id, create_connection(3))
+    topology.add_connection(node_c_id, node_b_id, create_connection(4))
 
-    # Update node profiles with network interfaces before adding to topology
-    assert node_a.node_profile is not None
-    assert node_b.node_profile is not None
-    assert node_c.node_profile is not None
+    conn_a_b = create_connection(1)
+    conn_b_a = create_connection(2)
+    conn_b_c = create_connection(3)
+    conn_c_b = create_connection(4)
+    conn_c_a = create_connection(5)
+    conn_a_c = create_connection(6)
 
-    node_a.node_profile = NodePerformanceProfile(
-        model_id="test",
-        chip_id="test",
-        friendly_name="test",
-        memory=node_a.node_profile.memory,
-        network_interfaces=[
-            NetworkInterfaceInfo(
-                name="en3",
-                ip_address=conn_a_b.send_back_multiaddr.ip_address,
-            ),
-            NetworkInterfaceInfo(
-                name="en4",
-                ip_address=conn_a_c.send_back_multiaddr.ip_address,
-            ),
-        ],
-        system=node_a.node_profile.system,
-    )
-    node_b.node_profile = NodePerformanceProfile(
-        model_id="test",
-        chip_id="test",
-        friendly_name="test",
-        memory=node_b.node_profile.memory,
-        network_interfaces=[
-            NetworkInterfaceInfo(
-                name="en3",
-                ip_address=conn_b_a.send_back_multiaddr.ip_address,
-            ),
-            NetworkInterfaceInfo(
-                name="en4",
-                ip_address=conn_b_c.send_back_multiaddr.ip_address,
-            ),
-        ],
-        system=node_b.node_profile.system,
-    )
-    node_c.node_profile = NodePerformanceProfile(
-        model_id="test",
-        chip_id="test",
-        friendly_name="test",
-        memory=node_c.node_profile.memory,
-        network_interfaces=[
-            NetworkInterfaceInfo(
-                name="en3",
-                ip_address=conn_c_b.send_back_multiaddr.ip_address,
-            ),
-            NetworkInterfaceInfo(
-                name="en4",
-                ip_address=conn_c_a.send_back_multiaddr.ip_address,
-            ),
-        ],
-        system=node_c.node_profile.system,
-    )
-
-    topology.add_node(node_a)
-    topology.add_node(node_b)
-    topology.add_node(node_c)
-
-    topology.add_connection(conn_a_b)
-    topology.add_connection(conn_b_a)
-    topology.add_connection(conn_b_c)
-    topology.add_connection(conn_c_b)
-    topology.add_connection(conn_c_a)
-    topology.add_connection(conn_a_c)
-
-    cycle = [node_a, node_b, node_c]
+    topology.add_connection(node_a_id, node_b_id, conn_a_b)
+    topology.add_connection(node_b_id, node_a_id, conn_b_a)
+    topology.add_connection(node_b_id, node_c_id, conn_b_c)
+    topology.add_connection(node_c_id, node_b_id, conn_c_b)
+    topology.add_connection(node_c_id, node_a_id, conn_c_a)
+    topology.add_connection(node_a_id, node_c_id, conn_a_c)
 
     # act
     coordinators = get_mlx_jaccl_coordinators(
-        cycle, coordinator_port=5000, cycle_digraph=topology
+        node_a_id, coordinator_port=5000, cycle_digraph=topology
     )
 
     # assert
@@ -389,11 +328,11 @@ def test_get_mlx_jaccl_coordinators(
 
     # Non-rank-0 nodes should use the specific IP from their connection to rank 0
     # node_b uses the IP from conn_b_a (node_b -> node_a)
-    assert coordinators[node_b_id] == (
-        f"{conn_b_a.send_back_multiaddr.ip_address}:5000"
-    ), "node_b should use the IP from conn_b_a"
+    assert coordinators[node_b_id] == (f"{conn_b_a.sink_multiaddr.ip_address}:5000"), (
+        "node_b should use the IP from conn_b_a"
+    )
 
     # node_c uses the IP from conn_c_a (node_c -> node_a)
-    assert coordinators[node_c_id] == (
-        f"{conn_c_a.send_back_multiaddr.ip_address}:5000"
-    ), "node_c should use the IP from conn_c_a"
+    assert coordinators[node_c_id] == (f"{conn_c_a.sink_multiaddr.ip_address}:5000"), (
+        "node_c should use the IP from conn_c_a"
+    )

src/exo/master/tests/test_topology.py

@@ -1,13 +1,14 @@
 import pytest
 
 from exo.shared.topology import Topology
+from exo.shared.types.common import NodeId
 from exo.shared.types.multiaddr import Multiaddr
 from exo.shared.types.profiling import (
-    MemoryPerformanceProfile,
+    MemoryUsage,
     NodePerformanceProfile,
     SystemPerformanceProfile,
 )
-from exo.shared.types.topology import Connection, ConnectionProfile, NodeId, NodeInfo
+from exo.shared.types.topology import SocketConnection
 
 
 @pytest.fixture
@@ -16,20 +17,15 @@ def topology() -> Topology:
 
 
 @pytest.fixture
-def connection() -> Connection:
-    return Connection(
-        local_node_id=NodeId(),
-        send_back_node_id=NodeId(),
-        send_back_multiaddr=Multiaddr(address="/ip4/127.0.0.1/tcp/1235"),
-        connection_profile=ConnectionProfile(
-            throughput=1000, latency=1000, jitter=1000
-        ),
+def connection() -> SocketConnection:
+    return SocketConnection(
+        sink_multiaddr=Multiaddr(address="/ip4/127.0.0.1/tcp/1235"),
     )
 
 
 @pytest.fixture
 def node_profile() -> NodePerformanceProfile:
-    memory_profile = MemoryPerformanceProfile.from_bytes(
+    memory_profile = MemoryUsage.from_bytes(
         ram_total=1000, ram_available=1000, swap_total=1000, swap_available=1000
     )
     system_profile = SystemPerformanceProfile()
@@ -43,162 +39,85 @@ def node_profile() -> NodePerformanceProfile:
     )
 
 
-@pytest.fixture
-def connection_profile() -> ConnectionProfile:
-    return ConnectionProfile(throughput=1000, latency=1000, jitter=1000)
-
-
-def test_add_node(topology: Topology, node_profile: NodePerformanceProfile):
+def test_add_node(topology: Topology):
     # arrange
     node_id = NodeId()
 
     # act
-    topology.add_node(NodeInfo(node_id=node_id, node_profile=node_profile))
+    topology.add_node(node_id)
 
     # assert
-    data = topology.get_node_profile(node_id)
-    assert data == node_profile
+    assert topology.node_is_leaf(node_id)
 
 
-def test_add_connection(
-    topology: Topology, node_profile: NodePerformanceProfile, connection: Connection
-):
+def test_add_connection(topology: Topology, connection: SocketConnection):
     # arrange
-    topology.add_node(
-        NodeInfo(node_id=connection.local_node_id, node_profile=node_profile)
-    )
-    topology.add_node(
-        NodeInfo(node_id=connection.send_back_node_id, node_profile=node_profile)
-    )
-    topology.add_connection(connection)
+    node_a = NodeId()
+    node_b = NodeId()
+
+    topology.add_node(node_a)
+    topology.add_node(node_b)
+    topology.add_connection(node_a, node_b, connection)
 
     # act
-    data = topology.get_connection_profile(connection)
+    data = list(conn for _, _, conn in topology.list_connections())
 
     # assert
-    assert data == connection.connection_profile
+    assert data == [connection]
 
-
-def test_update_node_profile(
-    topology: Topology, node_profile: NodePerformanceProfile, connection: Connection
-):
-    # arrange
-    topology.add_node(
-        NodeInfo(node_id=connection.local_node_id, node_profile=node_profile)
-    )
-    topology.add_node(
-        NodeInfo(node_id=connection.send_back_node_id, node_profile=node_profile)
-    )
-    topology.add_connection(connection)
-
-    new_node_profile = NodePerformanceProfile(
-        model_id="test",
-        chip_id="test",
-        friendly_name="test",
-        memory=MemoryPerformanceProfile.from_bytes(
-            ram_total=1000, ram_available=1000, swap_total=1000, swap_available=1000
-        ),
-        network_interfaces=[],
-        system=SystemPerformanceProfile(),
-    )
-
-    # act
-    topology.update_node_profile(
-        connection.local_node_id, node_profile=new_node_profile
-    )
-
-    # assert
-    data = topology.get_node_profile(connection.local_node_id)
-    assert data == new_node_profile
-
-
-def test_update_connection_profile(
-    topology: Topology, node_profile: NodePerformanceProfile, connection: Connection
-):
-    # arrange
-    topology.add_node(
-        NodeInfo(node_id=connection.local_node_id, node_profile=node_profile)
-    )
-    topology.add_node(
-        NodeInfo(node_id=connection.send_back_node_id, node_profile=node_profile)
-    )
-    topology.add_connection(connection)
-
-    new_connection_profile = ConnectionProfile(
-        throughput=2000, latency=2000, jitter=2000
-    )
-    connection = Connection(
-        local_node_id=connection.local_node_id,
-        send_back_node_id=connection.send_back_node_id,
-        send_back_multiaddr=connection.send_back_multiaddr,
-        connection_profile=new_connection_profile,
-    )
-
-    # act
-    topology.update_connection_profile(connection)
-
-    # assert
-    data = topology.get_connection_profile(connection)
-    assert data == new_connection_profile
+    assert topology.node_is_leaf(node_a)
+    assert topology.node_is_leaf(node_b)
 
 
 def test_remove_connection_still_connected(
-    topology: Topology, node_profile: NodePerformanceProfile, connection: Connection
+    topology: Topology, connection: SocketConnection
 ):
     # arrange
-    topology.add_node(
-        NodeInfo(node_id=connection.local_node_id, node_profile=node_profile)
-    )
-    topology.add_node(
-        NodeInfo(node_id=connection.send_back_node_id, node_profile=node_profile)
-    )
-    topology.add_connection(connection)
+    node_a = NodeId()
+    node_b = NodeId()
+
+    topology.add_node(node_a)
+    topology.add_node(node_b)
+    topology.add_connection(node_a, node_b, connection)
 
     # act
-    topology.remove_connection(connection)
+    topology.remove_connection(node_a, node_b, connection)
 
     # assert
-    assert topology.get_connection_profile(connection) is None
+    assert list(topology.get_all_connections_between(node_a, node_b)) == []
 
 
-def test_remove_node_still_connected(
-    topology: Topology, node_profile: NodePerformanceProfile, connection: Connection
-):
+def test_remove_node_still_connected(topology: Topology, connection: SocketConnection):
     # arrange
-    topology.add_node(
-        NodeInfo(node_id=connection.local_node_id, node_profile=node_profile)
-    )
-    topology.add_node(
-        NodeInfo(node_id=connection.send_back_node_id, node_profile=node_profile)
-    )
-    topology.add_connection(connection)
+    node_a = NodeId()
+    node_b = NodeId()
+
+    topology.add_node(node_a)
+    topology.add_node(node_b)
+    topology.add_connection(node_a, node_b, connection)
+    assert list(topology.out_edges(node_a)) == [(node_b, connection)]
 
     # act
-    topology.remove_node(connection.local_node_id)
+    topology.remove_node(node_b)
 
     # assert
-    assert topology.get_node_profile(connection.local_node_id) is None
+    assert list(topology.out_edges(node_a)) == []
 
 
-def test_list_nodes(
-    topology: Topology, node_profile: NodePerformanceProfile, connection: Connection
-):
+def test_list_nodes(topology: Topology, connection: SocketConnection):
     # arrange
-    topology.add_node(
-        NodeInfo(node_id=connection.local_node_id, node_profile=node_profile)
-    )
-    topology.add_node(
-        NodeInfo(node_id=connection.send_back_node_id, node_profile=node_profile)
-    )
-    topology.add_connection(connection)
+    node_a = NodeId()
+    node_b = NodeId()
+
+    topology.add_node(node_a)
+    topology.add_node(node_b)
+    topology.add_connection(node_a, node_b, connection)
+    assert list(topology.out_edges(node_a)) == [(node_b, connection)]
 
     # act
     nodes = list(topology.list_nodes())
 
     # assert
     assert len(nodes) == 2
-    assert all(isinstance(node, NodeInfo) for node in nodes)
-    assert {node.node_id for node in nodes} == {
-        connection.local_node_id,
-        connection.send_back_node_id,
-    }
+    assert all(isinstance(node, NodeId) for node in nodes)
+    assert {node for node in nodes} == {node_a, node_b}

src/exo/shared/apply.py

@@ -11,10 +11,8 @@ from exo.shared.types.events import (
     IndexedEvent,
     InstanceCreated,
     InstanceDeleted,
-    NodeCreated,
     NodeDownloadProgress,
-    NodeMemoryMeasured,
-    NodePerformanceMeasured,
+    NodeGatheredInfo,
     NodeTimedOut,
     RunnerDeleted,
     RunnerStatusUpdated,
@@ -27,13 +25,23 @@ from exo.shared.types.events import (
     TopologyEdgeCreated,
     TopologyEdgeDeleted,
 )
-from exo.shared.types.profiling import NodePerformanceProfile, SystemPerformanceProfile
+from exo.shared.types.profiling import NodePerformanceProfile
 from exo.shared.types.state import State
 from exo.shared.types.tasks import Task, TaskId, TaskStatus
-from exo.shared.types.topology import NodeInfo
+from exo.shared.types.topology import RDMAConnection
 from exo.shared.types.worker.downloads import DownloadProgress
 from exo.shared.types.worker.instances import Instance, InstanceId
 from exo.shared.types.worker.runners import RunnerId, RunnerStatus
+from exo.utils.info_gatherer.info_gatherer import (
+    MacmonMetrics,
+    MacTBConnections,
+    MacTBIdentifiers,
+    MemoryUsage,
+    MiscData,
+    NodeConfig,
+    NodeNetworkInterfaces,
+    StaticNodeInformation,
+)
 
 
 def event_apply(event: Event, state: State) -> State:
@@ -47,16 +55,12 @@ def event_apply(event: Event, state: State) -> State:
             return apply_instance_created(event, state)
         case InstanceDeleted():
             return apply_instance_deleted(event, state)
-        case NodeCreated():
-            return apply_topology_node_created(event, state)
         case NodeTimedOut():
             return apply_node_timed_out(event, state)
-        case NodePerformanceMeasured():
-            return apply_node_performance_measured(event, state)
         case NodeDownloadProgress():
             return apply_node_download_progress(event, state)
-        case NodeMemoryMeasured():
-            return apply_node_memory_measured(event, state)
+        case NodeGatheredInfo():
+            return apply_node_gathered_info(event, state)
         case RunnerDeleted():
             return apply_runner_deleted(event, state)
         case RunnerStatusUpdated():
@@ -188,7 +192,7 @@ def apply_runner_deleted(event: RunnerDeleted, state: State) -> State:
 
 
 def apply_node_timed_out(event: NodeTimedOut, state: State) -> State:
-    topology = copy.copy(state.topology)
+    topology = copy.deepcopy(state.topology)
     state.topology.remove_node(event.node_id)
     node_profiles = {
         key: value for key, value in state.node_profiles.items() if key != event.node_id
@@ -196,8 +200,12 @@ def apply_node_timed_out(event: NodeTimedOut, state: State) -> State:
     last_seen = {
         key: value for key, value in state.last_seen.items() if key != event.node_id
     }
+    downloads = {
+        key: value for key, value in state.downloads.items() if key != event.node_id
+    }
     return state.model_copy(
         update={
+            "downloads": downloads,
             "topology": topology,
             "node_profiles": node_profiles,
             "last_seen": last_seen,
@@ -205,103 +213,69 @@ def apply_node_timed_out(event: NodeTimedOut, state: State) -> State:
     )
 
 
-def apply_node_performance_measured(
-    event: NodePerformanceMeasured, state: State
-) -> State:
-    new_profiles: Mapping[NodeId, NodePerformanceProfile] = {
-        **state.node_profiles,
-        event.node_id: event.node_profile,
-    }
-    last_seen: Mapping[NodeId, datetime] = {
-        **state.last_seen,
-        event.node_id: datetime.fromisoformat(event.when),
-    }
-    state = state.model_copy(update={"node_profiles": new_profiles})
-    topology = copy.copy(state.topology)
-    # TODO: NodeCreated
-    if not topology.contains_node(event.node_id):
-        topology.add_node(NodeInfo(node_id=event.node_id))
-    topology.update_node_profile(event.node_id, event.node_profile)
+def apply_node_gathered_info(event: NodeGatheredInfo, state: State) -> State:
+    topology = copy.deepcopy(state.topology)
+    topology.add_node(event.node_id)
+    info = event.info
+    profile = state.node_profiles.get(event.node_id, NodePerformanceProfile())
+    # TODO: should be broken up into individual events instead of this monster
+    match info:
+        case MacmonMetrics():
+            profile.system = info.system_profile
+            profile.memory = info.memory
+        case MemoryUsage():
+            profile.memory = info
+        case NodeConfig():
+            pass
+        case MiscData():
+            profile.friendly_name = info.friendly_name
+        case StaticNodeInformation():
+            profile.model_id = info.model
+            profile.chip_id = info.chip
+        # TODO: makes me slightly sad
+        case NodeNetworkInterfaces():
+            profile.network_interfaces = info.ifaces
+        case MacTBIdentifiers():
+            profile.tb_interfaces = info.idents
+        case MacTBConnections():
+            conn_map = {
+                tb_ident.domain_uuid: (nid, tb_ident.rdma_interface)
+                for nid in state.node_profiles
+                for tb_ident in state.node_profiles[nid].tb_interfaces
+            }
+            as_rdma_conns = [
+                (
+                    conn_map[tb_conn.sink_uuid][0],
+                    RDMAConnection(
+                        source_rdma_iface=conn_map[tb_conn.source_uuid][1],
+                        sink_rdma_iface=conn_map[tb_conn.sink_uuid][1],
+                    ),
+                )
+                for tb_conn in info.conns
+                if tb_conn.source_uuid in conn_map
+                if tb_conn.sink_uuid in conn_map
+            ]
+            topology.replace_all_out_tb_connections(event.node_id, as_rdma_conns)
+
+    last_seen = {**state.last_seen, event.node_id: datetime.fromisoformat(event.when)}
+    new_profiles = {**state.node_profiles, event.node_id: profile}
     return state.model_copy(
         update={
             "node_profiles": new_profiles,
-            "topology": topology,
             "last_seen": last_seen,
+            "topology": topology,
         }
     )
 
 
-def apply_node_memory_measured(event: NodeMemoryMeasured, state: State) -> State:
-    existing = state.node_profiles.get(event.node_id)
-    topology = copy.copy(state.topology)
-
-    if existing is None:
-        created = NodePerformanceProfile(
-            model_id="unknown",
-            chip_id="unknown",
-            friendly_name="Unknown",
-            memory=event.memory,
-            network_interfaces=[],
-            system=SystemPerformanceProfile(
-                # TODO: flops_fp16=0.0,
-                gpu_usage=0.0,
-                temp=0.0,
-                sys_power=0.0,
-                pcpu_usage=0.0,
-                ecpu_usage=0.0,
-                ane_power=0.0,
-            ),
-        )
-        created_profiles: Mapping[NodeId, NodePerformanceProfile] = {
-            **state.node_profiles,
-            event.node_id: created,
-        }
-        last_seen: Mapping[NodeId, datetime] = {
-            **state.last_seen,
-            event.node_id: datetime.fromisoformat(event.when),
-        }
-        if not topology.contains_node(event.node_id):
-            topology.add_node(NodeInfo(node_id=event.node_id))
-            # TODO: NodeCreated
-        topology.update_node_profile(event.node_id, created)
-        return state.model_copy(
-            update={
-                "node_profiles": created_profiles,
-                "topology": topology,
-                "last_seen": last_seen,
-            }
-        )
-
-    updated = existing.model_copy(update={"memory": event.memory})
-    updated_profiles: Mapping[NodeId, NodePerformanceProfile] = {
-        **state.node_profiles,
-        event.node_id: updated,
-    }
-    # TODO: NodeCreated
-    if not topology.contains_node(event.node_id):
-        topology.add_node(NodeInfo(node_id=event.node_id))
-    topology.update_node_profile(event.node_id, updated)
-    return state.model_copy(
-        update={"node_profiles": updated_profiles, "topology": topology}
-    )
-
-
-def apply_topology_node_created(event: NodeCreated, state: State) -> State:
-    topology = copy.copy(state.topology)
-    topology.add_node(NodeInfo(node_id=event.node_id))
-    return state.model_copy(update={"topology": topology})
-
-
 def apply_topology_edge_created(event: TopologyEdgeCreated, state: State) -> State:
-    topology = copy.copy(state.topology)
-    topology.add_connection(event.edge)
+    topology = copy.deepcopy(state.topology)
+    topology.add_connection(event.source, event.sink, event.edge)
     return state.model_copy(update={"topology": topology})
 
 
 def apply_topology_edge_deleted(event: TopologyEdgeDeleted, state: State) -> State:
-    topology = copy.copy(state.topology)
-    if not topology.contains_connection(event.edge):
-        return state
-    topology.remove_connection(event.edge)
+    topology = copy.deepcopy(state.topology)
+    topology.remove_connection(event.sink, event.source, event.edge)
     # TODO: Clean up removing the reverse connection
     return state.model_copy(update={"topology": topology})

src/exo/shared/constants.py

@@ -38,6 +38,7 @@ EXO_TEST_LOG = EXO_CACHE_HOME / "exo_test.log"
 
 # Identity (config)
 EXO_NODE_ID_KEYPAIR = EXO_CONFIG_HOME / "node_id.keypair"
+EXO_CONFIG_FILE = EXO_CONFIG_HOME / "config.toml"
 
 # libp2p topics for event forwarding
 LIBP2P_LOCAL_EVENTS_TOPIC = "worker_events"

src/exo/shared/logging.py

@@ -24,6 +24,8 @@ class _InterceptHandler(logging.Handler):
         except ValueError:
             level = record.levelno
 
+        return
+
         logger.opt(depth=3, exception=record.exc_info).log(level, record.getMessage())
 
 

src/exo/shared/tests/test_apply/test_apply_node_download.py

@@ -39,7 +39,4 @@ def test_apply_two_node_download_progress():
         NodeDownloadProgress(download_progress=event2), state
     )
 
-    # TODO: This test is failing. We should support the following:
-    # 1. Downloading multiple models concurrently on the same node (one per runner is fine).
-    # 2. Downloading a model, it completes, then downloading a different model on the same node.
     assert new_state.downloads == {NodeId("node-1"): [event1, event2]}

src/exo/shared/tests/test_state_serialization.py

@@ -1,7 +1,7 @@
 from exo.shared.types.common import NodeId
 from exo.shared.types.multiaddr import Multiaddr
 from exo.shared.types.state import State
-from exo.shared.types.topology import Connection
+from exo.shared.types.topology import SocketConnection
 
 
 def test_state_serialization_roundtrip() -> None:
@@ -11,14 +11,12 @@ def test_state_serialization_roundtrip() -> None:
     node_a = NodeId("node-a")
     node_b = NodeId("node-b")
 
-    connection = Connection(
-        local_node_id=node_a,
-        send_back_node_id=node_b,
-        send_back_multiaddr=Multiaddr(address="/ip4/127.0.0.1/tcp/10001"),
+    connection = SocketConnection(
+        sink_multiaddr=Multiaddr(address="/ip4/127.0.0.1/tcp/10001"),
     )
 
     state = State()
-    state.topology.add_connection(connection)
+    state.topology.add_connection(node_a, node_b, connection)
 
     json_repr = state.model_dump_json()
     restored_state = State.model_validate_json(json_repr)

src/exo/shared/topology.py

@@ -1,203 +1,219 @@
 import contextlib
+from collections.abc import Mapping, Sequence
+from dataclasses import dataclass, field
 from typing import Iterable
 
 import rustworkx as rx
 from pydantic import BaseModel, ConfigDict
 
 from exo.shared.types.common import NodeId
-from exo.shared.types.profiling import ConnectionProfile, NodePerformanceProfile
-from exo.shared.types.topology import Connection, NodeInfo
+from exo.shared.types.topology import RDMAConnection, SocketConnection
 
 
 class TopologySnapshot(BaseModel):
-    nodes: list[NodeInfo]
-    connections: list[Connection]
+    nodes: Sequence[NodeId]
+    connections: Mapping[
+        NodeId, Mapping[NodeId, Sequence[SocketConnection | RDMAConnection]]
+    ]
 
-    model_config = ConfigDict(frozen=True, extra="forbid", strict=True)
+    model_config = ConfigDict(frozen=True, extra="forbid")
 
 
+@dataclass
 class Topology:
-    def __init__(self) -> None:
-        self._graph: rx.PyDiGraph[NodeInfo, Connection] = rx.PyDiGraph()
-        self._node_id_to_rx_id_map: dict[NodeId, int] = dict()
-        self._rx_id_to_node_id_map: dict[int, NodeId] = dict()
-        self._edge_id_to_rx_id_map: dict[Connection, int] = dict()
+    # the _graph can be used as a int -> NodeId map.
+    _graph: rx.PyDiGraph[NodeId, SocketConnection | RDMAConnection] = field(
+        init=False, default_factory=rx.PyDiGraph
+    )
+    _vertex_indices: dict[NodeId, int] = field(init=False, default_factory=dict)
 
     def to_snapshot(self) -> TopologySnapshot:
         return TopologySnapshot(
-            nodes=list(self.list_nodes()),
-            connections=list(self.list_connections()),
+            nodes=list(self.list_nodes()), connections=self.map_connections()
         )
 
     @classmethod
     def from_snapshot(cls, snapshot: TopologySnapshot) -> "Topology":
         topology = cls()
 
-        for node in snapshot.nodes:
+        for node_id in snapshot.nodes:
             with contextlib.suppress(ValueError):
-                topology.add_node(node)
+                topology.add_node(node_id)
 
-        for connection in snapshot.connections:
-            topology.add_connection(connection)
+        for source in snapshot.connections:
+            for sink in snapshot.connections[source]:
+                for conn in snapshot.connections[source][sink]:
+                    topology.add_connection(source, sink, conn)
 
         return topology
 
-    def add_node(self, node: NodeInfo) -> None:
-        if node.node_id in self._node_id_to_rx_id_map:
+    def add_node(self, node_id: NodeId) -> None:
+        if node_id in self._vertex_indices:
             return
-        rx_id = self._graph.add_node(node)
-        self._node_id_to_rx_id_map[node.node_id] = rx_id
-        self._rx_id_to_node_id_map[rx_id] = node.node_id
+        rx_id = self._graph.add_node(node_id)
+        self._vertex_indices[node_id] = rx_id
 
     def node_is_leaf(self, node_id: NodeId) -> bool:
         return (
-            node_id in self._node_id_to_rx_id_map
-            and len(self._graph.neighbors(self._node_id_to_rx_id_map[node_id])) == 1
+            node_id in self._vertex_indices
+            and len(self._graph.neighbors(self._vertex_indices[node_id])) <= 1
         )
 
     def neighbours(self, node_id: NodeId) -> list[NodeId]:
         return [
-            self._rx_id_to_node_id_map[rx_id]
-            for rx_id in self._graph.neighbors(self._node_id_to_rx_id_map[node_id])
+            self._graph[rx_id]
+            for rx_id in self._graph.neighbors(self._vertex_indices[node_id])
         ]
 
-    def out_edges(self, node_id: NodeId) -> list[tuple[NodeId, Connection]]:
-        if node_id not in self._node_id_to_rx_id_map:
+    def out_edges(
+        self, node_id: NodeId
+    ) -> Iterable[tuple[NodeId, SocketConnection | RDMAConnection]]:
+        if node_id not in self._vertex_indices:
             return []
-        return [
-            (self._rx_id_to_node_id_map[nid], conn)
-            for _, nid, conn in self._graph.out_edges(
-                self._node_id_to_rx_id_map[node_id]
-            )
-        ]
+        return (
+            (self._graph[nid], conn)
+            for _, nid, conn in self._graph.out_edges(self._vertex_indices[node_id])
+        )
 
     def contains_node(self, node_id: NodeId) -> bool:
-        return node_id in self._node_id_to_rx_id_map
-
-    def contains_connection(self, connection: Connection) -> bool:
-        return connection in self._edge_id_to_rx_id_map
+        return node_id in self._vertex_indices
 
     def add_connection(
         self,
-        connection: Connection,
+        source: NodeId,
+        sink: NodeId,
+        connection: SocketConnection | RDMAConnection,
     ) -> None:
-        if connection.local_node_id not in self._node_id_to_rx_id_map:
-            self.add_node(NodeInfo(node_id=connection.local_node_id))
-        if connection.send_back_node_id not in self._node_id_to_rx_id_map:
-            self.add_node(NodeInfo(node_id=connection.send_back_node_id))
-
-        if connection in self._edge_id_to_rx_id_map:
+        if connection in self.get_all_connections_between(source, sink):
             return
 
-        src_id = self._node_id_to_rx_id_map[connection.local_node_id]
-        sink_id = self._node_id_to_rx_id_map[connection.send_back_node_id]
+        if source not in self._vertex_indices:
+            self.add_node(source)
+        if sink not in self._vertex_indices:
+            self.add_node(sink)
 
-        rx_id = self._graph.add_edge(src_id, sink_id, connection)
-        self._edge_id_to_rx_id_map[connection] = rx_id
+        src_id = self._vertex_indices[source]
+        sink_id = self._vertex_indices[sink]
 
-    def list_nodes(self) -> Iterable[NodeInfo]:
-        return (self._graph[i] for i in self._graph.node_indices())
+        _ = self._graph.add_edge(src_id, sink_id, connection)
 
-    def list_connections(self) -> Iterable[Connection]:
-        return (connection for _, _, connection in self._graph.weighted_edge_list())
+    def get_all_connections_between(
+        self, source: NodeId, sink: NodeId
+    ) -> Iterable[SocketConnection | RDMAConnection]:
+        if source not in self._vertex_indices:
+            return []
+        if sink not in self._vertex_indices:
+            return []
 
-    def get_node_profile(self, node_id: NodeId) -> NodePerformanceProfile | None:
+        src_id = self._vertex_indices[source]
+        sink_id = self._vertex_indices[sink]
         try:
-            rx_idx = self._node_id_to_rx_id_map[node_id]
-            return self._graph.get_node_data(rx_idx).node_profile
-        except KeyError:
-            return None
+            return self._graph.get_all_edge_data(src_id, sink_id)
+        except rx.NoEdgeBetweenNodes:
+            return []
 
-    def update_node_profile(
-        self, node_id: NodeId, node_profile: NodePerformanceProfile
-    ) -> None:
-        rx_idx = self._node_id_to_rx_id_map[node_id]
-        self._graph[rx_idx].node_profile = node_profile
+    def list_nodes(self) -> Iterable[NodeId]:
+        return self._graph.nodes()
 
-    def update_connection_profile(self, connection: Connection) -> None:
-        rx_idx = self._edge_id_to_rx_id_map[connection]
-        self._graph.update_edge_by_index(rx_idx, connection)
+    def map_connections(
+        self,
+    ) -> Mapping[NodeId, Mapping[NodeId, Sequence[SocketConnection | RDMAConnection]]]:
+        base: dict[NodeId, dict[NodeId, list[SocketConnection | RDMAConnection]]] = {}
+        for src_id, sink_id, connection in self._graph.weighted_edge_list():
+            source = self._graph[src_id]
+            sink = self._graph[sink_id]
+            if source not in base:
+                base[source] = {}
+            if sink not in base[source]:
+                base[source][sink] = []
+            base[source][sink].append(connection)
+        return base
 
-    def get_connection_profile(
-        self, connection: Connection
-    ) -> ConnectionProfile | None:
-        try:
-            rx_idx = self._edge_id_to_rx_id_map[connection]
-            return self._graph.get_edge_data_by_index(rx_idx).connection_profile
-        except KeyError:
-            return None
+    def list_connections(
+        self,
+    ) -> Iterable[tuple[NodeId, NodeId, SocketConnection | RDMAConnection]]:
+        return (
+            (
+                self._graph[src_id],
+                self._graph[sink_id],
+                connection,
+            )
+            for src_id, sink_id, connection in self._graph.weighted_edge_list()
+        )
 
     def remove_node(self, node_id: NodeId) -> None:
-        if node_id not in self._node_id_to_rx_id_map:
+        if node_id not in self._vertex_indices:
             return
 
-        for connection in self.list_connections():
-            if (
-                connection.local_node_id == node_id
-                or connection.send_back_node_id == node_id
-            ):
-                self.remove_connection(connection)
-
-        rx_idx = self._node_id_to_rx_id_map[node_id]
+        rx_idx = self._vertex_indices[node_id]
         self._graph.remove_node(rx_idx)
 
-        del self._node_id_to_rx_id_map[node_id]
-        del self._rx_id_to_node_id_map[rx_idx]
+        del self._vertex_indices[node_id]
 
-    def remove_connection(self, connection: Connection) -> None:
-        if connection not in self._edge_id_to_rx_id_map:
+    def replace_all_out_tb_connections(
+        self, source: NodeId, new_connections: Sequence[tuple[NodeId, RDMAConnection]]
+    ) -> None:
+        for conn_idx in self._graph.out_edge_indices(self._vertex_indices[source]):
+            if isinstance(self._graph.get_edge_data_by_index(conn_idx), RDMAConnection):
+                self._graph.remove_edge_from_index(conn_idx)
+        for sink, conn in new_connections:
+            self.add_connection(source, sink, conn)
+
+    def remove_connection(
+        self, source: NodeId, sink: NodeId, edge: SocketConnection | RDMAConnection
+    ) -> None:
+        if source not in self._vertex_indices or sink not in self._vertex_indices:
             return
-        rx_idx = self._edge_id_to_rx_id_map[connection]
-        self._graph.remove_edge_from_index(rx_idx)
-        del self._edge_id_to_rx_id_map[connection]
+        for conn_idx in self._graph.edge_indices_from_endpoints(
+            self._vertex_indices[source], self._vertex_indices[sink]
+        ):
+            if self._graph.get_edge_data_by_index(conn_idx) == edge:
+                self._graph.remove_edge_from_index(conn_idx)
 
-    def get_cycles(self) -> list[list[NodeInfo]]:
+    def get_cycles(self) -> list[list[NodeId]]:
         cycle_idxs = rx.simple_cycles(self._graph)
-        cycles: list[list[NodeInfo]] = []
+        cycles: list[list[NodeId]] = []
         for cycle_idx in cycle_idxs:
             cycle = [self._graph[idx] for idx in cycle_idx]
             cycles.append(cycle)
 
         return cycles
 
-    def get_cycles_tb(self) -> list[list[NodeInfo]]:
+    def get_cycles_tb(self) -> list[list[NodeId]]:
         tb_edges = [
             (u, v, conn)
             for u, v, conn in self._graph.weighted_edge_list()
             if conn.is_thunderbolt()
         ]
 
-        tb_graph: rx.PyDiGraph[NodeInfo, Connection] = rx.PyDiGraph()
+        tb_graph: rx.PyDiGraph[NodeId, SocketConnection] = rx.PyDiGraph()
         tb_graph.add_nodes_from(self._graph.nodes())
 
         for u, v, conn in tb_edges:
-            tb_graph.add_edge(u, v, conn)
+            if isinstance(conn, SocketConnection):
+                tb_graph.add_edge(u, v, conn)
 
         cycle_idxs = rx.simple_cycles(tb_graph)
-        cycles: list[list[NodeInfo]] = []
+        cycles: list[list[NodeId]] = []
         for cycle_idx in cycle_idxs:
             cycle = [tb_graph[idx] for idx in cycle_idx]
             cycles.append(cycle)
 
         return cycles
 
-    def get_subgraph_from_nodes(self, nodes: list[NodeInfo]) -> "Topology":
-        node_idxs = [node.node_id for node in nodes]
-        rx_idxs = [self._node_id_to_rx_id_map[idx] for idx in node_idxs]
+    def get_subgraph_from_nodes(self, node_ids: list[NodeId]) -> "Topology":
+        rx_idxs = [self._vertex_indices[idx] for idx in node_ids]
         topology = Topology()
         for rx_idx in rx_idxs:
             topology.add_node(self._graph[rx_idx])
-        for connection in self.list_connections():
-            if (
-                connection.local_node_id in node_idxs
-                and connection.send_back_node_id in node_idxs
-            ):
-                topology.add_connection(connection)
+        for source, sink, connection in self.list_connections():
+            if source in node_ids and sink in node_ids:
+                topology.add_connection(source, sink, connection)
         return topology
 
-    def is_thunderbolt_cycle(self, cycle: list[NodeInfo]) -> bool:
-        node_idxs = [node.node_id for node in cycle]
-        rx_idxs = [self._node_id_to_rx_id_map[idx] for idx in node_idxs]
+    def is_thunderbolt_cycle(self, cycle: list[NodeId]) -> bool:
+        node_idxs = [node for node in cycle]
+        rx_idxs = [self._vertex_indices[idx] for idx in node_idxs]
         for rid in rx_idxs:
             for neighbor_rid in self._graph.neighbors(rid):
                 if neighbor_rid not in rx_idxs:

src/exo/shared/types/events.py

@@ -2,14 +2,14 @@ from datetime import datetime
 
 from pydantic import Field
 
-from exo.shared.topology import Connection, NodePerformanceProfile
+from exo.shared.topology import SocketConnection
 from exo.shared.types.chunks import GenerationChunk
 from exo.shared.types.common import CommandId, Id, NodeId, SessionId
-from exo.shared.types.profiling import MemoryPerformanceProfile
 from exo.shared.types.tasks import Task, TaskId, TaskStatus
 from exo.shared.types.worker.downloads import DownloadProgress
 from exo.shared.types.worker.instances import Instance, InstanceId
 from exo.shared.types.worker.runners import RunnerId, RunnerStatus
+from exo.utils.info_gatherer.info_gatherer import GatheredInfo
 from exo.utils.pydantic_ext import CamelCaseModel, TaggedModel
 
 
@@ -76,25 +76,15 @@ class RunnerDeleted(BaseEvent):
     runner_id: RunnerId
 
 
-# TODO
-class NodeCreated(BaseEvent):
-    node_id: NodeId
-
-
 class NodeTimedOut(BaseEvent):
     node_id: NodeId
 
 
-class NodePerformanceMeasured(BaseEvent):
+# TODO: bikeshed this naem
+class NodeGatheredInfo(BaseEvent):
     node_id: NodeId
     when: str  # this is a manually cast datetime overrode by the master when the event is indexed, rather than the local time on the device
-    node_profile: NodePerformanceProfile
-
-
-class NodeMemoryMeasured(BaseEvent):
-    node_id: NodeId
-    when: str  # this is a manually cast datetime overrode by the master when the event is indexed, rather than the local time on the device
-    memory: MemoryPerformanceProfile
+    info: GatheredInfo  # NB: this model is UNTAGGED!!! be warned for ser/de errors.
 
 
 class NodeDownloadProgress(BaseEvent):
@@ -107,11 +97,15 @@ class ChunkGenerated(BaseEvent):
 
 
 class TopologyEdgeCreated(BaseEvent):
-    edge: Connection
+    source: NodeId
+    sink: NodeId
+    edge: SocketConnection
 
 
 class TopologyEdgeDeleted(BaseEvent):
-    edge: Connection
+    source: NodeId
+    sink: NodeId
+    edge: SocketConnection
 
 
 Event = (
@@ -125,10 +119,8 @@ Event = (
     | InstanceDeleted
     | RunnerStatusUpdated
     | RunnerDeleted
-    | NodeCreated
     | NodeTimedOut
-    | NodePerformanceMeasured
-    | NodeMemoryMeasured
+    | NodeGatheredInfo
     | NodeDownloadProgress
     | ChunkGenerated
     | TopologyEdgeCreated

src/exo/shared/types/multiaddr.py

@@ -1,10 +1,11 @@
 import re
 from typing import ClassVar
 
-from pydantic import BaseModel, computed_field, field_validator
+from pydantic import BaseModel, ConfigDict, computed_field, field_validator
 
 
 class Multiaddr(BaseModel):
+    model_config = ConfigDict(frozen=True)
     address: str
 
     PATTERNS: ClassVar[list[str]] = [

src/exo/shared/types/profiling.py

@@ -1,12 +1,14 @@
+from collections.abc import Sequence
 from typing import Self
 
 import psutil
 
 from exo.shared.types.memory import Memory
+from exo.shared.types.thunderbolt import TBIdentifier
 from exo.utils.pydantic_ext import CamelCaseModel
 
 
-class MemoryPerformanceProfile(CamelCaseModel):
+class MemoryUsage(CamelCaseModel):
     ram_total: Memory
     ram_available: Memory
     swap_total: Memory
@@ -44,7 +46,6 @@ class SystemPerformanceProfile(CamelCaseModel):
     sys_power: float = 0.0
     pcpu_usage: float = 0.0
     ecpu_usage: float = 0.0
-    ane_power: float = 0.0
 
 
 class NetworkInterfaceInfo(CamelCaseModel):
@@ -53,15 +54,16 @@ class NetworkInterfaceInfo(CamelCaseModel):
 
 
 class NodePerformanceProfile(CamelCaseModel):
-    model_id: str
-    chip_id: str
-    friendly_name: str
-    memory: MemoryPerformanceProfile
-    network_interfaces: list[NetworkInterfaceInfo] = []
-    system: SystemPerformanceProfile
+    model_id: str = "Unknown"
+    chip_id: str = "Unknown"
+    friendly_name: str = "Unknown"
+    memory: MemoryUsage = MemoryUsage.from_bytes(
+        ram_total=0, ram_available=0, swap_total=0, swap_available=0
+    )
+    network_interfaces: Sequence[NetworkInterfaceInfo] = []
+    tb_interfaces: Sequence[TBIdentifier] = []
+    system: SystemPerformanceProfile = SystemPerformanceProfile()
 
 
 class ConnectionProfile(CamelCaseModel):
-    throughput: float
-    latency: float
-    jitter: float
+    pass

src/exo/shared/types/thunderbolt.py

@@ -0,0 +1,75 @@
+import anyio
+from pydantic import BaseModel, Field
+
+from exo.utils.pydantic_ext import CamelCaseModel
+
+
+class TBConnection(CamelCaseModel):
+    source_uuid: str
+    sink_uuid: str
+
+
+class TBIdentifier(CamelCaseModel):
+    rdma_interface: str
+    domain_uuid: str
+
+
+## Intentionally minimal, only collecting data we care about - there's a lot more
+
+
+class TBReceptacleTag(BaseModel, extra="ignore"):
+    receptacle_id_key: str | None = None
+
+
+class TBConnectivityItem(BaseModel, extra="ignore"):
+    domain_uuid_key: str | None = None
+
+
+class TBConnectivityData(BaseModel, extra="ignore"):
+    domain_uuid_key: str | None = None
+    items: list[TBConnectivityItem] | None = Field(None, alias="_items")
+    receptacle_1_tag: TBReceptacleTag | None = None
+
+    def ident(self, ifaces: dict[str, str]) -> TBIdentifier | None:
+        if (
+            self.domain_uuid_key is None
+            or self.receptacle_1_tag is None
+            or self.receptacle_1_tag.receptacle_id_key is None
+        ):
+            return
+        tag = f"Thunderbolt {self.receptacle_1_tag.receptacle_id_key}"
+        assert tag in ifaces  # doesn't need to be an assertion but im confident
+        # if tag not in ifaces: return None
+        iface = f"rdma_{ifaces[tag]}"
+        return TBIdentifier(rdma_interface=iface, domain_uuid=self.domain_uuid_key)
+
+    def conn(self) -> TBConnection | None:
+        if self.domain_uuid_key is None or self.items is None:
+            return
+
+        sink_key = next(
+            (
+                item.domain_uuid_key
+                for item in self.items
+                if item.domain_uuid_key is not None
+            ),
+            None,
+        )
+        if sink_key is None:
+            return None
+
+        return TBConnection(source_uuid=self.domain_uuid_key, sink_uuid=sink_key)
+
+
+class TBConnectivity(BaseModel):
+    SPThunderboltDataType: list[TBConnectivityData] = []
+
+    @classmethod
+    async def gather(cls) -> list[TBConnectivityData] | None:
+        proc = await anyio.run_process(
+            ["system_profiler", "SPThunderboltDataType", "-json"], check=False
+        )
+        if proc.returncode != 0:
+            return None
+        # Saving you from PascalCase while avoiding too much pydantic
+        return TBConnectivity.model_validate_json(proc.stdout).SPThunderboltDataType

src/exo/shared/types/topology.py

@@ -1,37 +1,32 @@
-from exo.shared.types.common import NodeId
+from enum import Enum
+
+from loguru import logger
+
 from exo.shared.types.multiaddr import Multiaddr
-from exo.shared.types.profiling import ConnectionProfile, NodePerformanceProfile
-from exo.utils.pydantic_ext import CamelCaseModel
+from exo.utils.pydantic_ext import FrozenModel
 
 
-class NodeInfo(CamelCaseModel):
-    node_id: NodeId
-    node_profile: NodePerformanceProfile | None = None
-
-
-class Connection(CamelCaseModel):
-    local_node_id: NodeId
-    send_back_node_id: NodeId
-    send_back_multiaddr: Multiaddr
-    connection_profile: ConnectionProfile | None = None
-
-    def __hash__(self) -> int:
-        return hash(
-            (
-                self.local_node_id,
-                self.send_back_node_id,
-                self.send_back_multiaddr.address,
-            )
-        )
-
-    def __eq__(self, other: object) -> bool:
-        if not isinstance(other, Connection):
-            raise ValueError("Cannot compare Connection with non-Connection")
-        return (
-            self.local_node_id == other.local_node_id
-            and self.send_back_node_id == other.send_back_node_id
-            and self.send_back_multiaddr == other.send_back_multiaddr
-        )
+class RDMAConnection(FrozenModel):
+    source_rdma_iface: str
+    sink_rdma_iface: str
 
     def is_thunderbolt(self) -> bool:
-        return str(self.send_back_multiaddr.ipv4_address).startswith("169.254")
+        logger.warning("duh")
+        return True
+
+
+# TODO
+class LinkType(str, Enum):
+    Thunderbolt = "Thunderbolt"
+    Ethernet = "Ethernet"
+    WiFi = "WiFi"
+
+
+class SocketConnection(FrozenModel):
+    sink_multiaddr: Multiaddr
+
+    def __hash__(self):
+        return hash(self.sink_multiaddr.ip_address)
+
+    def is_thunderbolt(self) -> bool:
+        return str(self.sink_multiaddr.ipv4_address).startswith("169.254")

src/exo/shared/types/worker/instances.py

@@ -30,7 +30,7 @@ class MlxRingInstance(BaseInstance):
 
 
 class MlxJacclInstance(BaseInstance):
-    ibv_devices: list[list[str | None]]
+    jaccl_devices: list[list[str | None]]
     jaccl_coordinators: dict[NodeId, str]
 
 

src/exo/shared/types/worker/resource_monitor.py

@@ -1,43 +0,0 @@
-import asyncio
-from abc import ABC, abstractmethod
-from collections.abc import Coroutine
-from typing import Callable
-
-from exo.shared.types.profiling import (
-    MemoryPerformanceProfile,
-    SystemPerformanceProfile,
-)
-
-
-class ResourceCollector(ABC):
-    @abstractmethod
-    async def collect(self) -> SystemPerformanceProfile | MemoryPerformanceProfile: ...
-
-
-class SystemResourceCollector(ResourceCollector):
-    async def collect(self) -> SystemPerformanceProfile: ...
-
-
-class MemoryResourceCollector(ResourceCollector):
-    async def collect(self) -> MemoryPerformanceProfile: ...
-
-
-class ResourceMonitor:
-    data_collectors: list[ResourceCollector]
-    effect_handlers: set[
-        Callable[[SystemPerformanceProfile | MemoryPerformanceProfile], None]
-    ]
-
-    async def _collect(
-        self,
-    ) -> list[SystemPerformanceProfile | MemoryPerformanceProfile]:
-        tasks: list[
-            Coroutine[None, None, SystemPerformanceProfile | MemoryPerformanceProfile]
-        ] = [collector.collect() for collector in self.data_collectors]
-        return await asyncio.gather(*tasks)
-
-    async def collect(self) -> None:
-        profiles = await self._collect()
-        for profile in profiles:
-            for effect_handler in self.effect_handlers:
-                effect_handler(profile)

src/exo/utils/info_gatherer/info_gatherer.py

@@ -0,0 +1,231 @@
+import os
+import shutil
+import sys
+import tomllib
+from collections.abc import Sequence
+from dataclasses import dataclass, field
+from subprocess import CalledProcessError
+from typing import Self, cast
+
+import anyio
+from anyio import create_task_group, open_process
+from anyio.abc import TaskGroup
+from anyio.streams.buffered import BufferedByteReceiveStream
+from anyio.streams.text import TextReceiveStream
+from loguru import logger
+
+from exo.shared.constants import EXO_CONFIG_FILE
+from exo.shared.types.memory import Memory
+from exo.shared.types.profiling import (
+    MemoryUsage,
+    NetworkInterfaceInfo,
+)
+from exo.shared.types.thunderbolt import TBConnection, TBConnectivity, TBIdentifier
+from exo.utils.channels import Sender
+from exo.utils.pydantic_ext import TaggedModel
+
+from .macmon import MacmonMetrics
+from .system_info import get_friendly_name, get_model_and_chip, get_network_interfaces
+
+IS_DARWIN = sys.platform == "darwin"
+
+
+class StaticNodeInformation(TaggedModel):
+    """Node information that should NEVER change, to be gathered once at startup"""
+
+    model: str
+    chip: str
+
+    @classmethod
+    async def gather(cls) -> Self:
+        model, chip = await get_model_and_chip()
+        return cls(model=model, chip=chip)
+
+
+class NodeNetworkInterfaces(TaggedModel):
+    ifaces: Sequence[NetworkInterfaceInfo]
+
+
+class MacTBIdentifiers(TaggedModel):
+    idents: Sequence[TBIdentifier]
+
+
+class MacTBConnections(TaggedModel):
+    conns: Sequence[TBConnection]
+
+
+class NodeConfig(TaggedModel):
+    """Node configuration from EXO_CONFIG_FILE, reloaded from the file only at startup. Other changes should come in through the API and propagate from there"""
+
+    # TODO
+    @classmethod
+    async def gather(cls) -> Self | None:
+        cfg_file = anyio.Path(EXO_CONFIG_FILE)
+        await cfg_file.touch(exist_ok=True)
+        async with await cfg_file.open("rb") as f:
+            try:
+                contents = (await f.read()).decode("utf-8")
+                data = tomllib.loads(contents)
+                return cls.model_validate(data)
+            except (tomllib.TOMLDecodeError, UnicodeDecodeError):
+                logger.warning("Invalid config file, skipping...")
+                return None
+
+
+class MiscData(TaggedModel):
+    """Node information that may slowly change that doesn't fall into the other categories"""
+
+    friendly_name: str
+
+    @classmethod
+    async def gather(cls) -> Self:
+        return cls(friendly_name=await get_friendly_name())
+
+
+async def _gather_iface_map() -> dict[str, str] | None:
+    proc = await anyio.run_process(
+        ["networksetup", "-listallhardwareports"], check=False
+    )
+    if proc.returncode != 0:
+        return None
+
+    ports: dict[str, str] = {}
+    port = ""
+    for line in proc.stdout.decode("utf-8").split("\n"):
+        if line.startswith("Hardware Port:"):
+            port = line.split(": ")[1]
+        elif line.startswith("Device:"):
+            ports[port] = line.split(": ")[1]
+            port = ""
+    if "" in ports:
+        del ports[""]
+    return ports
+
+
+GatheredInfo = (
+    MacmonMetrics
+    | MemoryUsage
+    | NodeNetworkInterfaces
+    | MacTBIdentifiers
+    | MacTBConnections
+    | NodeConfig
+    | MiscData
+    | StaticNodeInformation
+)
+
+
+@dataclass
+class InfoGatherer:
+    info_sender: Sender[GatheredInfo]
+    interface_watcher_interval: float | None = 10
+    misc_poll_interval: float | None = 60
+    system_profiler_interval: float | None = 5 if IS_DARWIN else None
+    memory_poll_rate: float | None = None if IS_DARWIN else 1
+    macmon_interval: float | None = 1 if IS_DARWIN else None
+    _tg: TaskGroup = field(init=False, default_factory=create_task_group)
+
+    async def run(self):
+        async with self._tg as tg:
+            if (macmon_path := shutil.which("macmon")) is not None:
+                tg.start_soon(self._monitor_macmon, macmon_path)
+            if IS_DARWIN:
+                tg.start_soon(self._monitor_system_profiler)
+            tg.start_soon(self._watch_system_info)
+            tg.start_soon(self._monitor_memory_usage)
+            tg.start_soon(self._monitor_misc)
+
+            nc = await NodeConfig.gather()
+            if nc is not None:
+                await self.info_sender.send(nc)
+            sni = await StaticNodeInformation.gather()
+            await self.info_sender.send(sni)
+
+    def shutdown(self):
+        self._tg.cancel_scope.cancel()
+
+    async def _monitor_misc(self):
+        if self.misc_poll_interval is None:
+            return
+        prev = await MiscData.gather()
+        while True:
+            curr = await MiscData.gather()
+            if prev != curr:
+                prev = curr
+                await self.info_sender.send(curr)
+            await anyio.sleep(self.misc_poll_interval)
+
+    async def _monitor_system_profiler(self):
+        if self.system_profiler_interval is None:
+            return
+        iface_map = await _gather_iface_map()
+        if iface_map is None:
+            return
+
+        old_idents = []
+        while True:
+            data = await TBConnectivity.gather()
+            assert data is not None
+
+            idents = [it for i in data if (it := i.ident(iface_map)) is not None]
+            if idents != old_idents:
+                await self.info_sender.send(MacTBIdentifiers(idents=idents))
+            old_idents = idents
+
+            conns = [it for i in data if (it := i.conn()) is not None]
+            await self.info_sender.send(MacTBConnections(conns=conns))
+
+            await anyio.sleep(self.system_profiler_interval)
+
+    async def _monitor_memory_usage(self):
+        override_memory_env = os.getenv("OVERRIDE_MEMORY_MB")
+        override_memory: int | None = (
+            Memory.from_mb(int(override_memory_env)).in_bytes
+            if override_memory_env
+            else None
+        )
+        if self.memory_poll_rate is None:
+            return
+        while True:
+            await self.info_sender.send(
+                MemoryUsage.from_psutil(override_memory=override_memory)
+            )
+            await anyio.sleep(self.memory_poll_rate)
+
+    async def _watch_system_info(self):
+        if self.interface_watcher_interval is None:
+            return
+        old_nics = []
+        while True:
+            nics = get_network_interfaces()
+            if nics != old_nics:
+                old_nics = nics
+                await self.info_sender.send(NodeNetworkInterfaces(ifaces=nics))
+            await anyio.sleep(self.interface_watcher_interval)
+
+    async def _monitor_macmon(self, macmon_path: str):
+        if self.macmon_interval is None:
+            return
+        # macmon pipe --interval [interval in ms]
+        try:
+            async with await open_process(
+                [macmon_path, "pipe", "--interval", str(self.macmon_interval * 1000)]
+            ) as p:
+                if not p.stdout:
+                    logger.critical("MacMon closed stdout")
+                    return
+                async for text in TextReceiveStream(
+                    BufferedByteReceiveStream(p.stdout)
+                ):
+                    await self.info_sender.send(MacmonMetrics.from_raw_json(text))
+        except CalledProcessError as e:
+            stderr_msg = "no stderr"
+            stderr_output = cast(bytes | str | None, e.stderr)
+            if stderr_output is not None:
+                stderr_msg = (
+                    stderr_output.decode()
+                    if isinstance(stderr_output, bytes)
+                    else str(stderr_output)
+                )
+            logger.warning(
+                f"MacMon failed with return code {e.returncode}: {stderr_msg}"
+            )

src/exo/utils/info_gatherer/macmon.py

@@ -0,0 +1,70 @@
+from typing import Self
+
+from pydantic import BaseModel
+
+from exo.shared.types.profiling import MemoryUsage, SystemPerformanceProfile
+from exo.utils.pydantic_ext import TaggedModel
+
+
+class _TempMetrics(BaseModel, extra="ignore"):
+    """Temperature-related metrics returned by macmon."""
+
+    cpu_temp_avg: float
+    gpu_temp_avg: float
+
+
+class _MemoryMetrics(BaseModel, extra="ignore"):
+    """Memory-related metrics returned by macmon."""
+
+    ram_total: int
+    ram_usage: int
+    swap_total: int
+    swap_usage: int
+
+
+class RawMacmonMetrics(BaseModel, extra="ignore"):
+    """Complete set of metrics returned by macmon.
+
+    Unknown fields are ignored for forward-compatibility.
+    """
+
+    timestamp: str  # ignored
+    temp: _TempMetrics
+    memory: _MemoryMetrics
+    ecpu_usage: tuple[int, float]  # freq mhz, usage %
+    pcpu_usage: tuple[int, float]  # freq mhz, usage %
+    gpu_usage: tuple[int, float]  # freq mhz, usage %
+    all_power: float
+    ane_power: float
+    cpu_power: float
+    gpu_power: float
+    gpu_ram_power: float
+    ram_power: float
+    sys_power: float
+
+
+class MacmonMetrics(TaggedModel):
+    system_profile: SystemPerformanceProfile
+    memory: MemoryUsage
+
+    @classmethod
+    def from_raw(cls, raw: RawMacmonMetrics) -> Self:
+        return cls(
+            system_profile=SystemPerformanceProfile(
+                gpu_usage=raw.gpu_usage[1],
+                temp=raw.temp.gpu_temp_avg,
+                sys_power=raw.sys_power,
+                pcpu_usage=raw.pcpu_usage[1],
+                ecpu_usage=raw.ecpu_usage[1],
+            ),
+            memory=MemoryUsage.from_bytes(
+                ram_total=raw.memory.ram_total,
+                ram_available=(raw.memory.ram_total - raw.memory.ram_usage),
+                swap_total=raw.memory.swap_total,
+                swap_available=(raw.memory.swap_total - raw.memory.swap_usage),
+            ),
+        )
+
+    @classmethod
+    def from_raw_json(cls, json: str) -> Self:
+        return cls.from_raw(RawMacmonMetrics.model_validate_json(json))

src/exo/utils/info_gatherer/net_profile.py

@@ -1,10 +1,12 @@
 import http.client
+from collections.abc import Mapping
 
 from anyio import create_task_group, to_thread
 from loguru import logger
 
 from exo.shared.topology import Topology
 from exo.shared.types.common import NodeId
+from exo.shared.types.profiling import NodePerformanceProfile
 
 
 async def check_reachability(
@@ -58,19 +60,20 @@ async def check_reachability(
 
 
 async def check_reachable(
-    topology: Topology, self_node_id: NodeId
+    topology: Topology,
+    profiles: Mapping[NodeId, NodePerformanceProfile],
+    self_node_id: NodeId,
 ) -> dict[NodeId, set[str]]:
-    """Check which nodes are reachable and return their IPs."""
     reachable: dict[NodeId, set[str]] = {}
     async with create_task_group() as tg:
-        for node in topology.list_nodes():
-            if not node.node_profile:
+        for node_id in topology.list_nodes():
+            if node_id not in profiles:
                 continue
-            for iface in node.node_profile.network_interfaces:
+            for iface in profiles[node_id].network_interfaces:
                 tg.start_soon(
                     check_reachability,
                     iface.ip_address,
-                    node.node_id,
+                    node_id,
                     self_node_id,
                     reachable,
                 )

src/exo/utils/pydantic_ext.py

@@ -19,11 +19,20 @@ class CamelCaseModel(BaseModel):
         alias_generator=to_camel,
         validate_by_name=True,
         extra="forbid",
-        # I want to reenable this ASAP, but it's causing an issue with TaskStatus
         strict=True,
     )
 
 
+class FrozenModel(BaseModel):
+    model_config = ConfigDict(
+        alias_generator=to_camel,
+        validate_by_name=True,
+        extra="forbid",
+        strict=True,
+        frozen=True,
+    )
+
+
 class TaggedModel(CamelCaseModel):
     @model_serializer(mode="wrap")
     def _serialize(self, handler: SerializerFunctionWrapHandler):

src/exo/utils/tests/test_mp_channel.py

@@ -28,9 +28,8 @@ def bar(send: MpSender[str]):
     send.close()
 
 
-# not async, just want the fail_after
 @pytest.mark.anyio
-async def test_channel_setup():
+async def test_channel_ipc():
     with fail_after(0.5):
         s, r = mp_channel[str]()
         p1 = mp.Process(target=foo, args=(r,))

src/exo/worker/engines/mlx/generator/generate.py

@@ -3,6 +3,7 @@ from typing import Any, Callable, Generator, cast, get_args
 import mlx.core as mx
 from mlx_lm import stream_generate
 from mlx_lm.models.cache import KVCache
+from mlx_lm.sample_utils import make_sampler
 from mlx_lm.tokenizer_utils import TokenizerWrapper
 
 # from exo.engines.mlx.cache import KVPrefixCache
@@ -47,7 +48,6 @@ def maybe_quantize_kv_cache(
 def warmup_inference(
     model: Model,
     tokenizer: TokenizerWrapper,
-    sampler: Callable[[mx.array], mx.array],
 ) -> int:
     content = "Prompt to warm up the inference engine. Repeat this."
 
@@ -70,6 +70,9 @@ def warmup_inference(
         model=model,
     )
 
+    # Use a default sampler for warmup
+    sampler = make_sampler(temp=0.7)
+
     logger.info("Generating warmup tokens")
     for _r in stream_generate(
         model=model,
@@ -115,7 +118,6 @@ def eos_ids_from_tokenizer(tokenizer: TokenizerWrapper) -> list[int]:
 def mlx_generate(
     model: Model,
     tokenizer: TokenizerWrapper,
-    sampler: Callable[[mx.array], mx.array],
     task: ChatCompletionTaskParams,
 ) -> Generator[GenerationResponse]:
     # Ensure that generation stats only contains peak memory for this generation
@@ -125,6 +127,9 @@ def mlx_generate(
     # Currently we support chat-completion tasks only.
     logger.info(f"task_params: {task}")
 
+    if task.seed is not None:
+        mx.random.seed(task.seed)
+
     prompt = apply_chat_template(
         tokenizer=tokenizer,
         chat_task_data=task,
@@ -138,6 +143,11 @@ def mlx_generate(
         eos_ids = eos_ids_from_tokenizer(tokenizer)
         logits_processors = [ban_token_ids(eos_ids)]
 
+    sampler = make_sampler(
+        temp=task.temperature if task.temperature is not None else 0.7,
+        top_p=task.top_p if task.top_p is not None else 1.0,
+    )
+
     max_tokens = task.max_tokens or MAX_TOKENS
     for out in stream_generate(
         model=model,

src/exo/worker/engines/mlx/utils_mlx.py

@@ -3,11 +3,10 @@ import os
 import resource
 import time
 from pathlib import Path
-from typing import Any, Callable, cast
+from typing import Any, cast
 
 from mlx_lm.models.cache import KVCache, QuantizedKVCache, RotatingKVCache
 from mlx_lm.models.deepseek_v3 import DeepseekV3Model
-from mlx_lm.sample_utils import make_sampler
 from mlx_lm.tokenizer_utils import TokenizerWrapper
 
 from exo.worker.engines.mlx.constants import (
@@ -132,22 +131,23 @@ def mlx_distributed_init(
                 group = mx.distributed.init(backend="ring", strict=True)
 
             case MlxJacclInstance(
-                ibv_devices=ibv_devices, jaccl_coordinators=jaccl_coordinators
+                jaccl_devices=jaccl_devices, jaccl_coordinators=jaccl_coordinators
             ):
                 # Use RDMA connectivity matrix
                 coordination_file = (
                     f"./hosts_{bound_instance.instance.instance_id}_{rank}.json"
                 )
-                ibv_devices_json = json.dumps(ibv_devices)
+                devices_file = f"./hosts_{rank}.json"
+                jaccl_devices_json = json.dumps(jaccl_devices)
 
                 with open(coordination_file, "w") as f:
-                    _ = f.write(ibv_devices_json)
+                    _ = f.write(jaccl_devices_json)
 
                 jaccl_coordinator = jaccl_coordinators[bound_instance.bound_node_id]
 
-                logger.info(f"rank {rank} MLX_IBV_DEVICES: {ibv_devices_json}")
+                logger.info(f"rank {rank} MLX_JACCL_DEVICES: {jaccl_devices_json}")
                 logger.info(f"rank {rank} MLX_JACCL_COORDINATOR: {jaccl_coordinator}")
-                os.environ["MLX_IBV_DEVICES"] = coordination_file
+                os.environ["MLX_JACCL_DEVICES"] = devices_file
                 os.environ["MLX_RANK"] = str(rank)
                 os.environ["MLX_JACCL_COORDINATOR"] = jaccl_coordinator
                 group = mx.distributed.init(backend="jaccl", strict=True)
@@ -176,11 +176,7 @@ def initialize_mlx(
 
 def load_mlx_items(
     bound_instance: BoundInstance, group: Group | None
-) -> tuple[Model, TokenizerWrapper, Callable[[mx.array], mx.array]]:
-    # TODO: pass temperature
-    sampler: Callable[[mx.array], mx.array] = make_sampler(temp=0.7)
-    logger.info("Created a sampler")
-
+) -> tuple[Model, TokenizerWrapper]:
     if group is None:
         logger.info(f"Single device used for {bound_instance.instance}")
         model_path = build_model_path(bound_instance.bound_shard.model_meta.model_id)
@@ -201,7 +197,7 @@ def load_mlx_items(
 
     set_wired_limit_for_model(get_weights_size(bound_instance.bound_shard))
 
-    return cast(Model, model), tokenizer, sampler
+    return cast(Model, model), tokenizer
 
 
 def shard_and_load(
@@ -289,15 +285,15 @@ def apply_chat_template(
     messages = chat_task_data.messages
 
     formatted_messages: list[dict[str, Any]] = []
-    for _, message in enumerate(messages):
+    for message in messages:
         if isinstance(message.content, ChatCompletionMessageText):
             message.content = message.content.text
         if isinstance(message.content, list):
-            if len(message.content) != 1:
-                logger.warning("Received malformed prompt")
+            if len(message.content) == 0:
+                logger.warning("Received prompt with no content, skipping")
                 continue
 
-            message.content = message.content[0].text
+            message.content = "\n".join(c.text for c in message.content).strip()
         if message.content is None and message.thinking is None:
             continue
 
@@ -310,6 +306,7 @@ def apply_chat_template(
         formatted_messages,
         tokenize=False,
         add_generation_prompt=True,
+        tools=chat_task_data.tools,
     )
 
     return prompt  # type: ignore

src/exo/worker/main.py

@@ -16,8 +16,7 @@ from exo.shared.types.events import (
     ForwarderEvent,
     IndexedEvent,
     NodeDownloadProgress,
-    NodeMemoryMeasured,
-    NodePerformanceMeasured,
+    NodeGatheredInfo,
     TaskCreated,
     TaskStatusUpdated,
     TopologyEdgeCreated,
@@ -25,7 +24,6 @@ from exo.shared.types.events import (
 )
 from exo.shared.types.models import ModelId
 from exo.shared.types.multiaddr import Multiaddr
-from exo.shared.types.profiling import MemoryPerformanceProfile, NodePerformanceProfile
 from exo.shared.types.state import State
 from exo.shared.types.tasks import (
     CreateRunner,
@@ -34,7 +32,7 @@ from exo.shared.types.tasks import (
     Task,
     TaskStatus,
 )
-from exo.shared.types.topology import Connection
+from exo.shared.types.topology import SocketConnection
 from exo.shared.types.worker.downloads import (
     DownloadCompleted,
     DownloadOngoing,
@@ -45,14 +43,14 @@ from exo.shared.types.worker.runners import RunnerId
 from exo.shared.types.worker.shards import ShardMetadata
 from exo.utils.channels import Receiver, Sender, channel
 from exo.utils.event_buffer import OrderedBuffer
+from exo.utils.info_gatherer.info_gatherer import GatheredInfo, InfoGatherer
+from exo.utils.info_gatherer.net_profile import check_reachable
 from exo.worker.download.download_utils import (
     map_repo_download_progress_to_download_progress_data,
 )
 from exo.worker.download.shard_downloader import RepoDownloadProgress, ShardDownloader
 from exo.worker.plan import plan
 from exo.worker.runner.runner_supervisor import RunnerSupervisor
-from exo.worker.utils import start_polling_memory_metrics, start_polling_node_metrics
-from exo.worker.utils.net_profile import check_reachable
 
 
 class Worker:
@@ -86,7 +84,7 @@ class Worker:
         self.state: State = State()
         self.download_status: dict[ModelId, DownloadProgress] = {}
         self.runners: dict[RunnerId, RunnerSupervisor] = {}
-        self._tg: TaskGroup | None = None
+        self._tg: TaskGroup = create_task_group()
 
         self._nack_cancel_scope: CancelScope | None = None
         self._nack_attempts: int = 0
@@ -98,37 +96,13 @@ class Worker:
     async def run(self):
         logger.info("Starting Worker")
 
-        # TODO: CLEANUP HEADER
-        async def resource_monitor_callback(
-            node_performance_profile: NodePerformanceProfile,
-        ) -> None:
-            await self.event_sender.send(
-                NodePerformanceMeasured(
-                    node_id=self.node_id,
-                    node_profile=node_performance_profile,
-                    when=str(datetime.now(tz=timezone.utc)),
-                ),
-            )
+        info_send, info_recv = channel[GatheredInfo]()
+        info_gatherer: InfoGatherer = InfoGatherer(info_send)
 
-        async def memory_monitor_callback(
-            memory_profile: MemoryPerformanceProfile,
-        ) -> None:
-            await self.event_sender.send(
-                NodeMemoryMeasured(
-                    node_id=self.node_id,
-                    memory=memory_profile,
-                    when=str(datetime.now(tz=timezone.utc)),
-                )
-            )
-
-        # END CLEANUP
-
-        async with create_task_group() as tg:
-            self._tg = tg
+        async with self._tg as tg:
+            tg.start_soon(info_gatherer.run)
+            tg.start_soon(self._forward_info, info_recv)
             tg.start_soon(self.plan_step)
-            tg.start_soon(start_polling_node_metrics, resource_monitor_callback)
-
-            tg.start_soon(start_polling_memory_metrics, memory_monitor_callback)
             tg.start_soon(self._emit_existing_download_progress)
             tg.start_soon(self._connection_message_event_writer)
             tg.start_soon(self._resend_out_for_delivery)
@@ -142,6 +116,17 @@ class Worker:
         for runner in self.runners.values():
             runner.shutdown()
 
+    async def _forward_info(self, recv: Receiver[GatheredInfo]):
+        with recv as info_stream:
+            async for info in info_stream:
+                await self.event_sender.send(
+                    NodeGatheredInfo(
+                        node_id=self.node_id,
+                        when=str(datetime.now(tz=timezone.utc)),
+                        info=info,
+                    )
+                )
+
     async def _event_applier(self):
         with self.global_event_receiver as events:
             async for f_event in events:
@@ -161,7 +146,6 @@ class Worker:
                     self._nack_cancel_scope is None
                     or self._nack_cancel_scope.cancel_called
                 ):
-                    assert self._tg
                     # Request the next index.
                     self._tg.start_soon(
                         self._nack_request, self.state.last_event_applied_idx + 1
@@ -250,8 +234,7 @@ class Worker:
                     await self.runners[self._task_to_runner_id(task)].start_task(task)
 
     def shutdown(self):
-        if self._tg:
-            self._tg.cancel_scope.cancel()
+        self._tg.cancel_scope.cancel()
 
     def _task_to_runner_id(self, task: Task):
         instance = self.state.instances[task.instance_id]
@@ -268,24 +251,24 @@ class Worker:
         match msg.connection_type:
             case ConnectionMessageType.Connected:
                 return TopologyEdgeCreated(
-                    edge=Connection(
-                        local_node_id=self.node_id,
-                        send_back_node_id=msg.node_id,
-                        send_back_multiaddr=Multiaddr(
+                    source=self.node_id,
+                    sink=msg.node_id,
+                    edge=SocketConnection(
+                        sink_multiaddr=Multiaddr(
                             address=f"/ip4/{msg.remote_ipv4}/tcp/{msg.remote_tcp_port}"
                         ),
-                    )
+                    ),
                 )
 
             case ConnectionMessageType.Disconnected:
                 return TopologyEdgeDeleted(
-                    edge=Connection(
-                        local_node_id=self.node_id,
-                        send_back_node_id=msg.node_id,
-                        send_back_multiaddr=Multiaddr(
+                    source=self.node_id,
+                    sink=msg.node_id,
+                    edge=SocketConnection(
+                        sink_multiaddr=Multiaddr(
                             address=f"/ip4/{msg.remote_ipv4}/tcp/{msg.remote_tcp_port}"
                         ),
-                    )
+                    ),
                 )
 
     async def _nack_request(self, since_idx: int) -> None:
@@ -334,7 +317,6 @@ class Worker:
             event_sender=self.event_sender.clone(),
         )
         self.runners[task.bound_instance.bound_runner_id] = runner
-        assert self._tg
         self._tg.start_soon(runner.run)
         return runner
 
@@ -393,7 +375,6 @@ class Worker:
                 last_progress_time = current_time()
 
         self.shard_downloader.on_progress(download_progress_callback)
-        assert self._tg
         self._tg.start_soon(self.shard_downloader.ensure_shard, task.shard_metadata)
 
     async def _forward_events(self) -> None:
@@ -416,7 +397,9 @@ class Worker:
         while True:
             # TODO: EdgeDeleted
             edges = set(self.state.topology.list_connections())
-            conns = await check_reachable(self.state.topology, self.node_id)
+            conns = await check_reachable(
+                self.state.topology, self.state.node_profiles, self.node_id
+            )
             for nid in conns:
                 for ip in conns[nid]:
                     if "127.0.0.1" in ip or "localhost" in ip:
@@ -424,26 +407,31 @@ class Worker:
                             f"Loopback connection should not happen: {ip=} for {nid=}"
                         )
 
-                    edge = Connection(
-                        local_node_id=self.node_id,
-                        send_back_node_id=nid,
+                    edge = SocketConnection(
                         # nonsense multiaddr
-                        send_back_multiaddr=Multiaddr(address=f"/ip4/{ip}/tcp/52415")
+                        sink_multiaddr=Multiaddr(address=f"/ip4/{ip}/tcp/52415")
                         if "." in ip
                         # nonsense multiaddr
                         else Multiaddr(address=f"/ip6/{ip}/tcp/52415"),
                     )
                     if edge not in edges:
                         logger.debug(f"ping discovered {edge=}")
-                        await self.event_sender.send(TopologyEdgeCreated(edge=edge))
+                        await self.event_sender.send(
+                            TopologyEdgeCreated(
+                                source=self.node_id, sink=nid, edge=edge
+                            )
+                        )
 
             for nid, conn in self.state.topology.out_edges(self.node_id):
-                if (
-                    nid not in conns
-                    or conn.send_back_multiaddr.ip_address not in conns.get(nid, set())
+                if not isinstance(conn, SocketConnection):
+                    continue
+                if nid not in conns or conn.sink_multiaddr.ip_address not in conns.get(
+                    nid, set()
                 ):
                     logger.debug(f"ping failed to discover {conn=}")
-                    await self.event_sender.send(TopologyEdgeDeleted(edge=conn))
+                    await self.event_sender.send(
+                        TopologyEdgeDeleted(source=self.node_id, sink=nid, edge=conn)
+                    )
 
             await anyio.sleep(10)
 

src/exo/worker/runner/bootstrap.py

@@ -19,7 +19,7 @@ def entrypoint(
 ) -> None:
     if (
         isinstance(bound_instance.instance, MlxJacclInstance)
-        and len(bound_instance.instance.ibv_devices) >= 2
+        and len(bound_instance.instance.jaccl_devices) >= 2
     ):
         os.environ["MLX_METAL_FAST_SYNCH"] = "1"
 

src/exo/worker/runner/runner.py

@@ -68,7 +68,6 @@ def main(
 
     model = None
     tokenizer = None
-    sampler = None
     group = None
 
     current_status: RunnerStatus = RunnerIdle()
@@ -110,14 +109,13 @@ def main(
                         )
                     )
 
-                    model, tokenizer, sampler = load_mlx_items(bound_instance, group)
+                    model, tokenizer = load_mlx_items(bound_instance, group)
 
                     current_status = RunnerLoaded()
                     logger.info("runner loaded")
                 case StartWarmup() if isinstance(current_status, RunnerLoaded):
                     assert model
                     assert tokenizer
-                    assert sampler
                     current_status = RunnerWarmingUp()
                     logger.info("runner warming up")
                     event_sender.send(
@@ -130,7 +128,6 @@ def main(
                     toks = warmup_inference(
                         model=model,
                         tokenizer=tokenizer,
-                        sampler=sampler,
                         # kv_prefix_cache=kv_prefix_cache,  # supply for warmup-time prefix caching
                     )
                     logger.info(f"warmed up by generating {toks} tokens")
@@ -144,7 +141,6 @@ def main(
                 ):
                     assert model
                     assert tokenizer
-                    assert sampler
                     logger.info(f"received chat request: {str(task)[:500]}")
                     current_status = RunnerRunning()
                     logger.info("runner running")
@@ -160,7 +156,6 @@ def main(
                     for response in mlx_generate(
                         model=model,
                         tokenizer=tokenizer,
-                        sampler=sampler,
                         task=task_params,
                     ):
                         match response:
@@ -204,7 +199,7 @@ def main(
                 RunnerStatusUpdated(runner_id=runner_id, runner_status=current_status)
             )
             if isinstance(current_status, RunnerShutdown):
-                del model, tokenizer, group, sampler
+                del model, tokenizer, group
                 mx.clear_cache()
                 import gc
 

src/exo/worker/tests/unittests/test_runner/test_event_ordering.py

@@ -111,7 +111,7 @@ def assert_events_equal(test_events: Iterable[Event], true_events: Iterable[Even
 def patch_out_mlx(monkeypatch: pytest.MonkeyPatch):
     # initialize_mlx returns a "group" equal to 1
     monkeypatch.setattr(mlx_runner, "initialize_mlx", make_nothin(1))
-    monkeypatch.setattr(mlx_runner, "load_mlx_items", make_nothin((1, 1, 1)))
+    monkeypatch.setattr(mlx_runner, "load_mlx_items", make_nothin((1, 1)))
     monkeypatch.setattr(mlx_runner, "warmup_inference", make_nothin(1))
     monkeypatch.setattr(mlx_runner, "_check_for_debug_prompts", nothin)
 

src/exo/worker/utils/__init__.py

@@ -1,6 +0,0 @@
-from .profile import start_polling_memory_metrics, start_polling_node_metrics
-
-__all__ = [
-    "start_polling_node_metrics",
-    "start_polling_memory_metrics",
-]

src/exo/worker/utils/profile.py

@@ -1,114 +0,0 @@
-import asyncio
-import os
-import platform
-from typing import Any, Callable, Coroutine
-
-import anyio
-from loguru import logger
-
-from exo.shared.types.memory import Memory
-from exo.shared.types.profiling import (
-    MemoryPerformanceProfile,
-    NodePerformanceProfile,
-    SystemPerformanceProfile,
-)
-
-from .macmon import (
-    MacMonError,
-    Metrics,
-)
-from .macmon import (
-    get_metrics_async as macmon_get_metrics_async,
-)
-from .system_info import (
-    get_friendly_name,
-    get_model_and_chip,
-    get_network_interfaces,
-)
-
-
-async def get_metrics_async() -> Metrics | None:
-    """Return detailed Metrics on macOS or a minimal fallback elsewhere."""
-
-    if platform.system().lower() == "darwin":
-        return await macmon_get_metrics_async()
-
-
-def get_memory_profile() -> MemoryPerformanceProfile:
-    """Construct a MemoryPerformanceProfile using psutil"""
-    override_memory_env = os.getenv("OVERRIDE_MEMORY_MB")
-    override_memory: int | None = (
-        Memory.from_mb(int(override_memory_env)).in_bytes
-        if override_memory_env
-        else None
-    )
-
-    return MemoryPerformanceProfile.from_psutil(override_memory=override_memory)
-
-
-async def start_polling_memory_metrics(
-    callback: Callable[[MemoryPerformanceProfile], Coroutine[Any, Any, None]],
-    *,
-    poll_interval_s: float = 0.5,
-) -> None:
-    """Continuously poll and emit memory-only metrics at a faster cadence.
-
-    Parameters
-    - callback: coroutine called with a fresh MemoryPerformanceProfile each tick
-    - poll_interval_s: interval between polls
-    """
-    while True:
-        try:
-            mem = get_memory_profile()
-            await callback(mem)
-        except MacMonError as e:
-            logger.opt(exception=e).error("Memory Monitor encountered error")
-        finally:
-            await anyio.sleep(poll_interval_s)
-
-
-async def start_polling_node_metrics(
-    callback: Callable[[NodePerformanceProfile], Coroutine[Any, Any, None]],
-):
-    poll_interval_s = 1.0
-    while True:
-        try:
-            metrics = await get_metrics_async()
-            if metrics is None:
-                return
-
-            network_interfaces = get_network_interfaces()
-            # these awaits could be joined but realistically they should be cached
-            model_id, chip_id = await get_model_and_chip()
-            friendly_name = await get_friendly_name()
-
-            # do the memory profile last to get a fresh reading to not conflict with the other memory profiling loop
-            memory_profile = get_memory_profile()
-
-            await callback(
-                NodePerformanceProfile(
-                    model_id=model_id,
-                    chip_id=chip_id,
-                    friendly_name=friendly_name,
-                    network_interfaces=network_interfaces,
-                    memory=memory_profile,
-                    system=SystemPerformanceProfile(
-                        gpu_usage=metrics.gpu_usage[1],
-                        temp=metrics.temp.gpu_temp_avg,
-                        sys_power=metrics.sys_power,
-                        pcpu_usage=metrics.pcpu_usage[1],
-                        ecpu_usage=metrics.ecpu_usage[1],
-                        ane_power=metrics.ane_power,
-                    ),
-                )
-            )
-
-        except asyncio.TimeoutError:
-            logger.warning(
-                "[resource_monitor] Operation timed out after 30s, skipping this cycle."
-            )
-        except MacMonError as e:
-            logger.opt(exception=e).error("Resource Monitor encountered error")
-            return
-        finally:
-            await anyio.sleep(poll_interval_s)

tests/headless_runner.py

@@ -34,7 +34,8 @@ from exo.shared.types.worker.instances import (
 )
 from exo.shared.types.worker.runners import RunnerId, ShardAssignments
 from exo.shared.types.worker.shards import PipelineShardMetadata, TensorShardMetadata
-from exo.utils.channels import MpReceiver, MpSender, mp_channel
+from exo.utils.channels import MpReceiver, MpSender, channel, mp_channel
+from exo.utils.info_gatherer.info_gatherer import GatheredInfo, InfoGatherer
 from exo.worker.download.impl_shard_downloader import (
     build_full_shard,
     exo_shard_downloader,
@@ -67,6 +68,7 @@ async def main():
     app = FastAPI()
     app.post("/ring")(ring_backend)
     app.post("/jaccl")(jaccl_backend)
+    app.post("/tb_detection")(tb_detection)
     shutdown = anyio.Event()
     await serve(
         app,  # type: ignore
@@ -78,6 +80,15 @@ async def main():
     shutdown.set()
 
 
+async def tb_detection():
+    send, recv = channel[GatheredInfo]()
+    ig = InfoGatherer(send)
+    with anyio.move_on_after(1):
+        await ig._monitor_system_profiler()  # pyright: ignore[reportPrivateUsage]
+    with recv:
+        return recv.collect()
+
+
 async def assert_downloads():
     sd = exo_shard_downloader()
     # await sd.ensure_shard(await build_full_shard(MODEL_CARDS["qwen3-0.6b"].model_id))

uv.lock

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 name = "altgraph"
 version = "0.17.5"
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-
-[[package]]
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-version = "0.23.1"
-source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/9a/6e/026678aa5a830e07cd9498a05d3e7e650a4f56a42f267a53d22bcda1bdc9/bidict-0.23.1.tar.gz", hash = "sha256:03069d763bc387bbd20e7d49914e75fc4132a41937fa3405417e1a5a2d006d71", size = 29093, upload-time = "2024-02-18T19:09:05.748Z" }
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-
 [[package]]
 name = "certifi"
 version = "2025.10.5"
@@ -196,42 +166,6 @@ wheels = [
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-dependencies = [
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