testing macmon

## Motivation

With the addition of the Responses API, we introduced `str |
list[InputMessage]` as the type for `TextGenerationTaskParams.input`
since the Responses API supports sending input as a plain string. But
there was no reason to leak that flexibility past the API adapter
boundary — it just meant every downstream consumer had to do `if
isinstance(messages, str):` checks, adding complexity for no benefit.

## Changes

- Changed `TextGenerationTaskParams.input` from `str |
list[InputMessage]` to `list[InputMessage]`
- Each API adapter (Chat Completions, Claude Messages, Responses) now
normalizes to `list[InputMessage]` at the boundary
- Removed `isinstance(task_params.input, str)` branches in
`utils_mlx.py` and `runner.py`
- Wrapped string inputs in `[InputMessage(role="user", content=...)]` in
the warmup path and all test files

## Why It Works

The API adapters are the only place where we deal with raw user input
formats. By normalizing there, all downstream code (worker, runner, MLX
engine) can just assume `list[InputMessage]` and skip the type-checking
branches. The type system (`basedpyright`) catches any missed call sites
at compile time.

## Test Plan

### Automated Testing
- `uv run basedpyright` — 0 errors
- `uv run ruff check` — passes
- `nix fmt` — applied
- `uv run pytest` — 174 passed, 1 skipped

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

.github/actions/typecheck/action.yml

@@ -1,12 +0,0 @@
-name: Type Check
-
-description: "Run type checker"
-
-runs:
-  using: "composite"
-  steps:
-    - name: Run type checker
-      run: |
-        nix --extra-experimental-features nix-command --extra-experimental-features flakes develop -c just sync
-        nix --extra-experimental-features nix-command --extra-experimental-features flakes develop -c just check
-      shell: bash

.github/workflows/pipeline.yml

@@ -26,73 +26,14 @@ jobs:
           name: exo
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
 
-      - name: Configure git user
-        run: |
-          git config --local user.email "github-actions@users.noreply.github.com"
-          git config --local user.name  "github-actions bot"
-        shell: bash
+      - name: Load nix develop environment
+        run: nix run github:nicknovitski/nix-develop/v1
 
-      - name: Pull LFS files
-        run: |
-          echo "Pulling Git LFS files..."
-          git lfs pull
-        shell: bash
+      - name: Sync dependencies
+        run: uv sync --all-packages
 
-      - name: Setup Nix Environment
-        run: |
-          echo "Checking for nix installation..."
-          
-          # Check if nix binary exists directly
-          if [ -f /nix/var/nix/profiles/default/bin/nix ]; then
-            echo "Found nix binary at /nix/var/nix/profiles/default/bin/nix"
-            export PATH="/nix/var/nix/profiles/default/bin:$PATH"
-            echo "PATH=$PATH" >> $GITHUB_ENV
-            nix --version
-          elif [ -f /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh ]; then
-            echo "Found nix profile script, sourcing..."
-            source /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
-            nix --version
-          elif command -v nix >/dev/null 2>&1; then
-            echo "Nix already in PATH"
-            nix --version
-          else
-            echo "Nix not found. Debugging info:"
-            echo "Contents of /nix/var/nix/profiles/default/:"
-            ls -la /nix/var/nix/profiles/default/ 2>/dev/null || echo "Directory not found"
-            echo "Contents of /nix/var/nix/profiles/default/bin/:"
-            ls -la /nix/var/nix/profiles/default/bin/ 2>/dev/null || echo "Directory not found"
-            exit 1
-          fi
-        shell: bash
-
-      - name: Configure basedpyright include for local MLX
-        run: |
-          RUNNER_LABELS='${{ toJSON(runner.labels) }}'
-          if echo "$RUNNER_LABELS" | grep -q "local_mlx"; then
-            if [ -d "/Users/Shared/mlx" ]; then
-              echo "Updating [tool.basedpyright].include to use /Users/Shared/mlx"
-              awk '
-                BEGIN { in=0 }
-                /^\[tool\.basedpyright\]/ { in=1; print; next }
-                in && /^\[/ { in=0 }  # next section
-                in && /^[ \t]*include[ \t]*=/ {
-                  print "include = [\"/Users/Shared/mlx\"]"
-                  next
-                }
-                { print }
-              ' pyproject.toml > pyproject.toml.tmp && mv pyproject.toml.tmp pyproject.toml
-
-              echo "New [tool.basedpyright] section:"
-              sed -n '/^\[tool\.basedpyright\]/,/^\[/p' pyproject.toml | sed '$d' || true
-            else
-              echo "local_mlx tag present but /Users/Shared/mlx not found; leaving pyproject unchanged."
-            fi
-          else
-            echo "Runner does not have 'local_mlx' tag; leaving pyproject unchanged."
-          fi
-        shell: bash
-
-      - uses: ./.github/actions/typecheck
+      - name: Run type checker
+        run: uv run basedpyright --project pyproject.toml
 
   nix:
     name: Build and check (${{ matrix.system }})
@@ -123,6 +64,63 @@ jobs:
           name: exo
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
 
+      - name: Build Metal packages (macOS only)
+        if: runner.os == 'macOS'
+        run: |
+          # Try to build metal-toolchain first (may succeed via cachix cache hit)
+          if nix build .#metal-toolchain 2>/dev/null; then
+            echo "metal-toolchain built successfully (likely cache hit)"
+          else
+            echo "metal-toolchain build failed, extracting from Xcode..."
+
+            NAR_HASH="sha256-ayR5mXN4sZAddwKEG2OszGRF93k9ZFc7H0yi2xbylQw="
+            NAR_NAME="metal-toolchain-17C48.nar"
+
+            # Use RUNNER_TEMP to avoid /tmp symlink issues on macOS
+            WORK_DIR="${RUNNER_TEMP}/metal-work"
+            mkdir -p "$WORK_DIR"
+
+            # Download the Metal toolchain component
+            xcodebuild -downloadComponent MetalToolchain
+
+            # Find and mount the DMG
+            DMG_PATH=$(find /System/Library/AssetsV2/com_apple_MobileAsset_MetalToolchain -name '*.dmg' 2>/dev/null | head -1)
+            if [ -z "$DMG_PATH" ]; then
+              echo "Error: Could not find Metal toolchain DMG"
+              exit 1
+            fi
+
+            echo "Found DMG at: $DMG_PATH"
+            hdiutil attach "$DMG_PATH" -mountpoint "${WORK_DIR}/metal-dmg"
+
+            # Copy the toolchain
+            cp -R "${WORK_DIR}/metal-dmg/Metal.xctoolchain" "${WORK_DIR}/metal-export"
+            hdiutil detach "${WORK_DIR}/metal-dmg"
+
+            # Create NAR and add to store
+            nix nar pack "${WORK_DIR}/metal-export" > "${WORK_DIR}/${NAR_NAME}"
+            STORE_PATH=$(nix store add --mode flat "${WORK_DIR}/${NAR_NAME}")
+            echo "Added NAR to store: $STORE_PATH"
+
+            # Verify the hash matches
+            ACTUAL_HASH=$(nix hash file "${WORK_DIR}/${NAR_NAME}")
+            if [ "$ACTUAL_HASH" != "$NAR_HASH" ]; then
+              echo "Warning: NAR hash mismatch!"
+              echo "Expected: $NAR_HASH"
+              echo "Actual:   $ACTUAL_HASH"
+              echo "The metal-toolchain.nix may need updating"
+            fi
+
+            # Clean up
+            rm -rf "$WORK_DIR"
+
+            # Retry the build now that NAR is in store
+            nix build .#metal-toolchain
+          fi
+
+          # Build mlx (depends on metal-toolchain)
+          nix build .#mlx
+
       - name: Build all Nix outputs
         run: |
           nix flake show --json | jq -r '
@@ -134,3 +132,150 @@ jobs:
 
       - name: Run nix flake check
         run: nix flake check
+
+      - name: Run pytest (macOS only)
+        if: runner.os == 'macOS'
+        run: |
+          # Build the test environment (requires relaxed sandbox for uv2nix on macOS)
+          TEST_ENV=$(nix build '.#exo-test-env' --option sandbox relaxed --print-out-paths)
+
+          # Run pytest outside sandbox (needs GPU access for MLX)
+          export HOME="$RUNNER_TEMP"
+          export EXO_TESTS=1
+          EXO_RESOURCES_DIR="$PWD/resources" $TEST_ENV/bin/python -m pytest src -m "not slow" --import-mode=importlib
+
+  dashboard-tests:
+    name: Dashboard E2E Tests
+    runs-on: macos-26
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          lfs: false
+
+      - uses: cachix/install-nix-action@v31
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+
+      - uses: cachix/cachix-action@v14
+        name: Configure Cachix
+        with:
+          name: exo
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+
+      - name: Build Metal packages
+        run: |
+          if nix build .#metal-toolchain 2>/dev/null; then
+            echo "metal-toolchain built successfully (likely cache hit)"
+          else
+            echo "metal-toolchain build failed, extracting from Xcode..."
+
+            NAR_HASH="sha256-ayR5mXN4sZAddwKEG2OszGRF93k9ZFc7H0yi2xbylQw="
+            NAR_NAME="metal-toolchain-17C48.nar"
+
+            WORK_DIR="${RUNNER_TEMP}/metal-work"
+            mkdir -p "$WORK_DIR"
+
+            xcodebuild -downloadComponent MetalToolchain
+
+            DMG_PATH=$(find /System/Library/AssetsV2/com_apple_MobileAsset_MetalToolchain -name '*.dmg' 2>/dev/null | head -1)
+            if [ -z "$DMG_PATH" ]; then
+              echo "Error: Could not find Metal toolchain DMG"
+              exit 1
+            fi
+
+            echo "Found DMG at: $DMG_PATH"
+            hdiutil attach "$DMG_PATH" -mountpoint "${WORK_DIR}/metal-dmg"
+
+            cp -R "${WORK_DIR}/metal-dmg/Metal.xctoolchain" "${WORK_DIR}/metal-export"
+            hdiutil detach "${WORK_DIR}/metal-dmg"
+
+            nix nar pack "${WORK_DIR}/metal-export" > "${WORK_DIR}/${NAR_NAME}"
+            STORE_PATH=$(nix store add --mode flat "${WORK_DIR}/${NAR_NAME}")
+            echo "Added NAR to store: $STORE_PATH"
+
+            rm -rf "$WORK_DIR"
+
+            nix build .#metal-toolchain
+          fi
+
+          nix build .#mlx
+
+      - name: Install macmon for hardware monitoring
+        run: brew install macmon
+
+      - name: Load nix develop environment
+        run: nix run github:nicknovitski/nix-develop/v1
+
+      - name: Sync Python dependencies
+        run: uv sync --all-packages
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+          cache-dependency-path: dashboard/package-lock.json
+
+      - name: Install dashboard dependencies
+        working-directory: dashboard
+        run: npm ci
+
+      - name: Install Playwright browsers
+        working-directory: dashboard
+        run: npx playwright install chromium --with-deps
+
+      - name: Build dashboard
+        working-directory: dashboard
+        run: npm run build
+
+      - name: Verify macmon is accessible
+        run: |
+          echo "PATH: $PATH"
+          which macmon || echo "macmon not in PATH"
+          macmon --version
+          # Test macmon actually works - capture stderr too
+          echo "Testing macmon pipe output (with stderr)..."
+          timeout 5 macmon pipe --interval 1000 2>&1 || echo "macmon pipe exit code: $?"
+          # Try running macmon raw (not pipe mode)
+          echo "Testing macmon raw output..."
+          macmon raw 2>&1 | head -5 || echo "macmon raw failed"
+
+      - name: Verify Python can find macmon
+        run: |
+          echo "Testing shutil.which from uv run python..."
+          uv run python -c "import shutil; print('Python shutil.which macmon:', shutil.which('macmon'))"
+
+      - name: Run Playwright tests
+        working-directory: dashboard
+        run: |
+          export PATH="/usr/sbin:/usr/bin:/opt/homebrew/bin:$PATH"
+          echo "Effective PATH: $PATH"
+          which macmon && echo "macmon found at $(which macmon)"
+          npm test
+        env:
+          CI: true
+
+      - name: Upload test results
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: playwright-report
+          path: dashboard/playwright-report/
+          retention-days: 30
+
+      - name: Upload video recordings
+        uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: test-videos
+          path: dashboard/test-results/
+          retention-days: 30
+
+      - name: Upload snapshot diffs
+        uses: actions/upload-artifact@v4
+        if: failure()
+        with:
+          name: snapshot-diffs
+          path: dashboard/tests/**/*-snapshots/*-diff.png
+          retention-days: 30

.gitignore

@@ -28,3 +28,13 @@ target/
 dashboard/build/
 dashboard/node_modules/
 dashboard/.svelte-kit/
+
+# playwright
+dashboard/test-results/
+dashboard/playwright-report/
+dashboard/playwright/.cache/
+dashboard/tests/**/*-snapshots/*-actual.png
+dashboard/tests/**/*-snapshots/*-diff.png
+
+# host config snapshots
+hosts_*.json

README.md

@@ -5,7 +5,7 @@
   <img alt="exo logo" src="/docs/imgs/exo-logo-transparent.png" width="50%" height="50%">
 </picture>
 
-exo: Run your own AI cluster at home with everyday devices. Maintained by [exo labs](https://x.com/exolabs).
+exo: Run frontier AI locally. Maintained by [exo labs](https://x.com/exolabs).
 
 <p align="center">
   <a href="https://discord.gg/TJ4P57arEm" target="_blank" rel="noopener noreferrer"><img src="https://img.shields.io/badge/Discord-Join%20Server-5865F2?logo=discord&logoColor=white" alt="Discord"></a>
@@ -107,6 +107,10 @@ uv run exo
 
 This starts the exo dashboard and API at http://localhost:52415/
 
+
+*Please view the section on RDMA to enable this feature on MacOS >=26.2!*
+
+
 ### Run from Source (Linux)
 
 **Prerequisites:**
@@ -230,7 +234,7 @@ This removes:
 
 RDMA is a new capability added to macOS 26.2. It works on any Mac with Thunderbolt 5 (M4 Pro Mac Mini, M4 Max Mac Studio, M4 Max MacBook Pro, M3 Ultra Mac Studio).
 
-Note that on Mac Studio, you cannot use the Thunderbolt 5 port next to the Ethernet port.
+Please refer to the caveats for immediate troubleshooting.
 
 To enable RDMA on macOS, follow these steps:
 
@@ -247,6 +251,14 @@ To enable RDMA on macOS, follow these steps:
 
 After that, RDMA will be enabled in macOS and exo will take care of the rest.
 
+**Important Caveats**
+
+1. Devices that wish to be part of an RDMA cluster must be connected to all other devices in the cluster.
+2. The cables must support TB5.
+3. On a Mac Studio, you cannot use the Thunderbolt 5 port next to the Ethernet port.
+4. If running from source, please use the script found at `tmp/set_rdma_network_config.sh`, which will disable Thunderbolt Bridge and set dhcp on each RDMA port.
+5. RDMA ports may be unable to discover each other on different versions of MacOS. Please ensure that OS versions match exactly (even beta version numbers) on all devices.
+
 ---
 
 ### Using the API

app/EXO/EXO.xcodeproj/project.pbxproj

@@ -342,6 +342,8 @@
 				SDKROOT = macosx;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = "DEBUG $(inherited)";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_TREAT_WARNINGS_AS_ERRORS = YES;
+				GCC_TREAT_WARNINGS_AS_ERRORS = YES;
 			};
 			name = Debug;
 		};
@@ -397,6 +399,8 @@
 				MTL_FAST_MATH = YES;
 				SDKROOT = macosx;
 				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_TREAT_WARNINGS_AS_ERRORS = YES;
+				GCC_TREAT_WARNINGS_AS_ERRORS = YES;
 			};
 			name = Release;
 		};

app/EXO/EXO/EXOApp.swift

@@ -45,8 +45,8 @@ struct EXOApp: App {
         let thunderboltBridge = ThunderboltBridgeService(clusterStateService: service)
         _thunderboltBridgeService = StateObject(wrappedValue: thunderboltBridge)
         enableLaunchAtLoginIfNeeded()
-        // Remove old LaunchDaemon components if they exist (from previous versions)
-        cleanupLegacyNetworkSetup()
+        // Install LaunchDaemon to disable Thunderbolt Bridge on startup (prevents network loops)
+        NetworkSetupHelper.promptAndInstallIfNeeded()
         // Check local network access periodically (warning disappears when user grants permission)
         localNetwork.startPeriodicChecking(interval: 10)
         controller.scheduleLaunch(after: 15)
@@ -136,36 +136,6 @@ struct EXOApp: App {
         }
     }
 
-    private func cleanupLegacyNetworkSetup() {
-        guard NetworkSetupHelper.hasInstalledComponents() else { return }
-        // Dispatch async to ensure app is ready before showing alert
-        DispatchQueue.main.async {
-            let alert = NSAlert()
-            alert.messageText = "EXO Network Configuration"
-            alert.informativeText =
-                "EXO needs to configure local network discovery on your device. This requires granting permission once."
-            alert.alertStyle = .informational
-            alert.addButton(withTitle: "Continue")
-            alert.addButton(withTitle: "Later")
-
-            let response = alert.runModal()
-            guard response == .alertFirstButtonReturn else {
-                Logger().info("User deferred legacy network setup cleanup")
-                return
-            }
-
-            do {
-                try NetworkSetupHelper.uninstall()
-                Logger().info("Cleaned up legacy network setup components")
-            } catch {
-                // Non-fatal: user may have cancelled admin prompt or cleanup may have
-                // partially succeeded. The app will continue normally.
-                Logger().warning(
-                    "Could not clean up legacy network setup (non-fatal): \(error.localizedDescription)"
-                )
-            }
-        }
-    }
 }
 
 /// Helper for managing EXO's launch-at-login registration
@@ -255,7 +225,7 @@ private final class ExoUpdaterDelegate: NSObject, SPUUpdaterDelegate {
         }
     }
 
-    private func showNotification(title: String, body: String) {
+    nonisolated private func showNotification(title: String, body: String) {
         let center = UNUserNotificationCenter.current()
         let content = UNMutableNotificationContent()
         content.title = title

app/EXO/EXO/Models/ClusterState.swift

@@ -293,7 +293,7 @@ struct ClusterTask {
     let modelName: String?
     let promptPreview: String?
     let errorMessage: String?
-    let parameters: ChatCompletionTaskParameters?
+    let parameters: TextGenerationTaskParameters?
 
     var sortPriority: Int {
         switch status {
@@ -330,12 +330,12 @@ struct ClusterTaskPayload: Decodable {
     let taskStatus: TaskStatus?
     let instanceId: String?
     let commandId: String?
-    let taskParams: ChatCompletionTaskParameters?
+    let taskParams: TextGenerationTaskParameters?
     let errorType: String?
     let errorMessage: String?
 }
 
-struct ChatCompletionTaskParameters: Decodable, Equatable {
+struct TextGenerationTaskParameters: Decodable, Equatable {
     let model: String?
     let messages: [ChatCompletionMessage]?
     let maxTokens: Int?
@@ -374,7 +374,7 @@ extension ClusterTask {
         guard let id = payload.taskId else { return nil }
         let status = payload.taskStatus ?? .unknown
         switch kindKey {
-        case "ChatCompletion":
+        case "TextGeneration":
             self.init(
                 id: id,
                 status: status,

app/EXO/EXO/Services/NetworkSetupHelper.swift

@@ -11,6 +11,100 @@ enum NetworkSetupHelper {
     private static let legacyScriptDestination =
         "/Library/Application Support/EXO/disable_bridge_enable_dhcp.sh"
     private static let plistDestination = "/Library/LaunchDaemons/io.exo.networksetup.plist"
+    private static let requiredStartInterval: Int = 1786
+
+    private static let setupScript = """
+        #!/usr/bin/env bash
+
+        set -euo pipefail
+
+        # Wait for macOS to finish network setup after boot
+        sleep 20
+
+        PREFS="/Library/Preferences/SystemConfiguration/preferences.plist"
+
+        # Remove bridge0 interface
+        ifconfig bridge0 &>/dev/null && {
+          ifconfig bridge0 | grep -q 'member' && {
+            ifconfig bridge0 | awk '/member/ {print $2}' | xargs -n1 ifconfig bridge0 deletem 2>/dev/null || true
+          }
+          ifconfig bridge0 destroy 2>/dev/null || true
+        }
+
+        # Remove Thunderbolt Bridge from VirtualNetworkInterfaces in preferences.plist
+        /usr/libexec/PlistBuddy -c "Delete :VirtualNetworkInterfaces:Bridge:bridge0" "$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
+        """
+
+    /// Prompts user and installs the LaunchDaemon if not already installed.
+    /// Shows an alert explaining what will be installed before requesting admin privileges.
+    static func promptAndInstallIfNeeded() {
+        // Use .utility priority to match NSAppleScript's internal QoS and avoid priority inversion
+        Task.detached(priority: .utility) {
+            // If already correctly installed, skip
+            if daemonAlreadyInstalled() {
+                return
+            }
+
+            // Show alert on main thread
+            let shouldInstall = await MainActor.run {
+                let alert = NSAlert()
+                alert.messageText = "EXO Network Configuration"
+                alert.informativeText =
+                    "EXO needs to install a system service to configure local networking. This will disable Thunderbolt Bridge (preventing packet storms) and install a Network Location.\n\nYou will be prompted for your password."
+                alert.alertStyle = .informational
+                alert.addButton(withTitle: "Install")
+                alert.addButton(withTitle: "Not Now")
+                return alert.runModal() == .alertFirstButtonReturn
+            }
+
+            guard shouldInstall else {
+                logger.info("User deferred network setup daemon installation")
+                return
+            }
+
+            do {
+                try installLaunchDaemon()
+                logger.info("Network setup launch daemon installed and started")
+            } catch {
+                logger.error(
+                    "Network setup launch daemon failed: \(error.localizedDescription, privacy: .public)"
+                )
+            }
+        }
+    }
 
     /// Removes all EXO network setup components from the system.
     /// This includes the LaunchDaemon, scripts, logs, and network location.
@@ -30,6 +124,100 @@ enum NetworkSetupHelper {
         return scriptExists || legacyScriptExists || plistExists
     }
 
+    private static func daemonAlreadyInstalled() -> Bool {
+        let manager = FileManager.default
+        let scriptExists = manager.fileExists(atPath: scriptDestination)
+        let plistExists = manager.fileExists(atPath: plistDestination)
+        guard scriptExists, plistExists else { return false }
+        guard
+            let installedScript = try? String(contentsOfFile: scriptDestination, encoding: .utf8),
+            installedScript.trimmingCharacters(in: .whitespacesAndNewlines)
+                == setupScript.trimmingCharacters(in: .whitespacesAndNewlines)
+        else {
+            return false
+        }
+        guard
+            let data = try? Data(contentsOf: URL(fileURLWithPath: plistDestination)),
+            let plist = try? PropertyListSerialization.propertyList(
+                from: data, options: [], format: nil) as? [String: Any]
+        else {
+            return false
+        }
+        guard
+            let interval = plist["StartInterval"] as? Int,
+            interval == requiredStartInterval
+        else {
+            return false
+        }
+        if let programArgs = plist["ProgramArguments"] as? [String],
+            programArgs.contains(scriptDestination) == false
+        {
+            return false
+        }
+        return true
+    }
+
+    private static func installLaunchDaemon() throws {
+        let installerScript = makeInstallerScript()
+        try runShellAsAdmin(installerScript)
+    }
+
+    private static func makeInstallerScript() -> String {
+        """
+        set -euo pipefail
+
+        LABEL="\(daemonLabel)"
+        SCRIPT_DEST="\(scriptDestination)"
+        LEGACY_SCRIPT_DEST="\(legacyScriptDestination)"
+        PLIST_DEST="\(plistDestination)"
+        LOG_OUT="/var/log/\(daemonLabel).log"
+        LOG_ERR="/var/log/\(daemonLabel).err.log"
+
+        # First, completely remove any existing installation
+        launchctl bootout system/"$LABEL" 2>/dev/null || true
+        rm -f "$PLIST_DEST"
+        rm -f "$SCRIPT_DEST"
+        rm -f "$LEGACY_SCRIPT_DEST"
+        rm -f "$LOG_OUT" "$LOG_ERR"
+
+        # Install fresh
+        mkdir -p "$(dirname "$SCRIPT_DEST")"
+
+        cat > "$SCRIPT_DEST" <<'EOF_SCRIPT'
+        \(setupScript)
+        EOF_SCRIPT
+        chmod 755 "$SCRIPT_DEST"
+
+        cat > "$PLIST_DEST" <<'EOF_PLIST'
+        <?xml version="1.0" encoding="UTF-8"?>
+        <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+        <plist version="1.0">
+        <dict>
+          <key>Label</key>
+          <string>\(daemonLabel)</string>
+          <key>ProgramArguments</key>
+          <array>
+            <string>/bin/bash</string>
+            <string>\(scriptDestination)</string>
+          </array>
+          <key>StartInterval</key>
+          <integer>\(requiredStartInterval)</integer>
+          <key>RunAtLoad</key>
+          <true/>
+          <key>StandardOutPath</key>
+          <string>/var/log/\(daemonLabel).log</string>
+          <key>StandardErrorPath</key>
+          <string>/var/log/\(daemonLabel).err.log</string>
+        </dict>
+        </plist>
+        EOF_PLIST
+
+        launchctl bootstrap system "$PLIST_DEST"
+        launchctl enable system/"$LABEL"
+        launchctl kickstart -k system/"$LABEL"
+        """
+    }
+
     private static func makeUninstallScript() -> String {
         """
         set -euo pipefail
@@ -56,11 +244,11 @@ enum NetworkSetupHelper {
         rm -f "$LOG_OUT" "$LOG_ERR"
 
         # Switch back to Automatic network location
-        networksetup -switchtolocation Automatic 2>/dev/null || true
+        networksetup -switchtolocation Automatic >/dev/null 2>&1 || true
 
         # Delete the exo network location if it exists
-        networksetup -listlocations | grep -q '^exo$' && {
-          networksetup -deletelocation exo 2>/dev/null || true
+        networksetup -listlocations 2>/dev/null | grep -q '^exo$' && {
+          networksetup -deletelocation exo >/dev/null 2>&1 || true
         } || true
 
         # Re-enable any Thunderbolt Bridge service if it exists
@@ -70,12 +258,12 @@ enum NetworkSetupHelper {
           tb_devices=$(networksetup -listallhardwareports 2>/dev/null | awk '
             /^Hardware Port:/ { port = tolower(substr($0, 16)) }
             /^Device:/ { if (port ~ /thunderbolt/) print substr($0, 9) }
-          ')
+          ') || true
           [ -z "$tb_devices" ] && return 0
 
           # For each bridge device, check if it contains Thunderbolt interfaces
           for bridge in bridge0 bridge1 bridge2; do
-            members=$(ifconfig "$bridge" 2>/dev/null | awk '/member:/ {print $2}')
+            members=$(ifconfig "$bridge" 2>/dev/null | awk '/member:/ {print $2}') || true
             [ -z "$members" ] && continue
 
             for tb_dev in $tb_devices; do
@@ -84,7 +272,7 @@ enum NetworkSetupHelper {
                 service_name=$(networksetup -listnetworkserviceorder 2>/dev/null | awk -v dev="$bridge" '
                   /^\\([0-9*]/ { gsub(/^\\([0-9*]+\\) /, ""); svc = $0 }
                   /Device:/ && $0 ~ dev { print svc; exit }
-                ')
+                ') || true
                 if [ -n "$service_name" ]; then
                   networksetup -setnetworkserviceenabled "$service_name" on 2>/dev/null || true
                   return 0
@@ -92,8 +280,9 @@ enum NetworkSetupHelper {
               fi
             done
           done
+          return 0
         }
-        find_and_enable_thunderbolt_bridge
+        find_and_enable_thunderbolt_bridge || true
 
         echo "EXO network components removed successfully"
         """

app/EXO/EXO/Services/ThunderboltBridgeService.swift

@@ -127,21 +127,24 @@ final class ThunderboltBridgeService: ObservableObject {
 
         // 2. Request specific network configuration rights
         let rightName = "system.services.systemconfiguration.network"
-        var item = AuthorizationItem(
-            name: rightName,
-            valueLength: 0,
-            value: nil,
-            flags: 0
-        )
-        var rights = AuthorizationRights(count: 1, items: &item)
-
-        status = AuthorizationCopyRights(
-            authRef,
-            &rights,
-            nil,
-            [.extendRights, .interactionAllowed],
-            nil
-        )
+        status = rightName.withCString { nameCString in
+            var item = AuthorizationItem(
+                name: nameCString,
+                valueLength: 0,
+                value: nil,
+                flags: 0
+            )
+            return withUnsafeMutablePointer(to: &item) { itemPointer in
+                var rights = AuthorizationRights(count: 1, items: itemPointer)
+                return AuthorizationCopyRights(
+                    authRef,
+                    &rights,
+                    nil,
+                    [.extendRights, .interactionAllowed],
+                    nil
+                )
+            }
+        }
         guard status == errAuthorizationSuccess else {
             if status == errAuthorizationCanceled {
                 throw ThunderboltBridgeError.authorizationCanceled

app/EXO/EXO/ViewModels/InstanceViewModel.swift

@@ -216,7 +216,7 @@ struct InstanceTaskViewModel: Identifiable, Equatable {
     let promptPreview: String?
     let errorMessage: String?
     let subtitle: String?
-    let parameters: ChatCompletionTaskParameters?
+    let parameters: TextGenerationTaskParameters?
 
     var title: String {
         switch kind {

app/EXO/uninstall-exo.sh

@@ -29,21 +29,21 @@ YELLOW='\033[1;33m'
 NC='\033[0m' # No Color
 
 echo_info() {
-    echo -e "${GREEN}[INFO]${NC} $1"
+  echo -e "${GREEN}[INFO]${NC} $1"
 }
 
 echo_warn() {
-    echo -e "${YELLOW}[WARN]${NC} $1"
+  echo -e "${YELLOW}[WARN]${NC} $1"
 }
 
 echo_error() {
-    echo -e "${RED}[ERROR]${NC} $1"
+  echo -e "${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
+  echo_error "This script must be run as root (use sudo)"
+  exit 1
 fi
 
 echo ""
@@ -55,64 +55,64 @@ 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"
+  launchctl bootout system/"$LABEL" 2>/dev/null || true
+  echo_info "Daemon stopped"
 else
-    echo_warn "Daemon was not running"
+  echo_warn "Daemon was not running"
 fi
 
 # Remove LaunchDaemon plist
-if [[ -f "$PLIST_DEST" ]]; then
-    rm -f "$PLIST_DEST"
-    echo_info "Removed 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?)"
+  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"
+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?)"
+  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"
+  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"
+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?)"
+  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"
+  networksetup -switchtolocation Automatic 2>/dev/null || true
+  echo_info "Switched to Automatic network location"
 else
-    echo_warn "Automatic network location not found"
+  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"
+  networksetup -deletelocation exo 2>/dev/null || true
+  echo_info "Deleted 'exo' network location"
 else
-    echo_warn "'exo' network location not found (already removed?)"
+  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"
+  networksetup -setnetworkserviceenabled "Thunderbolt Bridge" on 2>/dev/null || true
+  echo_info "Re-enabled Thunderbolt Bridge"
 fi
 
 # Note about launch at login registration
@@ -124,14 +124,14 @@ 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."
+  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 ""
@@ -151,4 +151,3 @@ echo ""
 echo "Manual step required:"
 echo "  Remove EXO from Login Items in System Settings → General → Login Items"
 echo ""
-

bench/exo_bench.py

@@ -5,10 +5,13 @@ from __future__ import annotations
 import argparse
 import contextlib
 import http.client
+import itertools
 import json
 import os
+import sys
 import time
 from collections.abc import Callable
+from pathlib import Path
 from statistics import mean
 from typing import Any
 from urllib.parse import urlencode
@@ -16,6 +19,84 @@ from urllib.parse import urlencode
 from loguru import logger
 from transformers import AutoTokenizer
 
+# Monkey-patch for transformers 5.x compatibility
+# Kimi's tokenization_kimi.py imports bytes_to_unicode from the old location
+# which was moved in transformers 5.0.0rc2
+try:
+    import transformers.models.gpt2.tokenization_gpt2 as gpt2_tokenization
+    from transformers.convert_slow_tokenizer import bytes_to_unicode
+
+    if not hasattr(gpt2_tokenization, "bytes_to_unicode"):
+        gpt2_tokenization.bytes_to_unicode = bytes_to_unicode  # type: ignore[attr-defined]
+except ImportError:
+    pass  # transformers < 5.0 or bytes_to_unicode not available
+
+
+def load_tokenizer_for_bench(model_id: str) -> Any:
+    """
+    Load tokenizer for benchmarking, with special handling for Kimi models.
+
+    Kimi uses a custom TikTokenTokenizer that transformers 5.x can't load via AutoTokenizer.
+    This function replicates the logic from utils_mlx.py for bench compatibility.
+    """
+    model_id_lower = model_id.lower()
+
+    if "kimi-k2" in model_id_lower:
+        import importlib.util
+        import types
+
+        from huggingface_hub import snapshot_download
+
+        # Download/get the model path
+        model_path = Path(
+            snapshot_download(
+                model_id,
+                allow_patterns=["*.json", "*.py", "*.tiktoken"],
+            )
+        )
+
+        sys.path.insert(0, str(model_path))
+
+        # Load tool_declaration_ts first (tokenization_kimi imports it with relative import)
+        tool_decl_path = model_path / "tool_declaration_ts.py"
+        if tool_decl_path.exists():
+            spec = importlib.util.spec_from_file_location(
+                "tool_declaration_ts", tool_decl_path
+            )
+            if spec and spec.loader:
+                tool_decl_module = importlib.util.module_from_spec(spec)
+                sys.modules["tool_declaration_ts"] = tool_decl_module
+                spec.loader.exec_module(tool_decl_module)
+
+        # Load tokenization_kimi with patched source (convert relative to absolute import)
+        tok_path = model_path / "tokenization_kimi.py"
+        source = tok_path.read_text()
+        source = source.replace("from .tool_declaration_ts", "from tool_declaration_ts")
+        spec = importlib.util.spec_from_file_location("tokenization_kimi", tok_path)
+        if spec:
+            tok_module = types.ModuleType("tokenization_kimi")
+            tok_module.__file__ = str(tok_path)
+            sys.modules["tokenization_kimi"] = tok_module
+            exec(compile(source, tok_path, "exec"), tok_module.__dict__)  # noqa: S102
+            TikTokenTokenizer = tok_module.TikTokenTokenizer  # noqa: N806
+        else:
+            from tokenization_kimi import TikTokenTokenizer  # type: ignore[import-not-found]  # noqa: I001
+
+        hf_tokenizer: Any = TikTokenTokenizer.from_pretrained(model_path)
+
+        # Patch encode to use internal tiktoken model directly
+        # transformers 5.x has a bug in the encode->pad path for slow tokenizers
+        def _patched_encode(text: str, **kwargs: object) -> list[int]:
+            # Pass allowed_special="all" to handle special tokens like <|im_user|>
+            return list(hf_tokenizer.model.encode(text, allowed_special="all"))
+
+        hf_tokenizer.encode = _patched_encode
+
+        return hf_tokenizer
+
+    # Default: use AutoTokenizer
+    return AutoTokenizer.from_pretrained(model_id, trust_remote_code=True)
+
 
 class ExoHttpError(RuntimeError):
     def __init__(self, status: int, reason: str, body_preview: str):
@@ -24,7 +105,7 @@ class ExoHttpError(RuntimeError):
 
 
 class ExoClient:
-    def __init__(self, host: str, port: int, timeout_s: float = 600.0):
+    def __init__(self, host: str, port: int, timeout_s: float = 7200.0):
         self.host = host
         self.port = port
         self.timeout_s = timeout_s
@@ -180,14 +261,7 @@ def parse_int_list(values: list[str]) -> list[int]:
             part = part.strip()
             if part:
                 items.append(int(part))
-
-    seen: set[int] = set()
-    out: list[int] = []
-    for x in items:
-        if x not in seen:
-            out.append(x)
-            seen.add(x)
-    return out
+    return items
 
 
 def resolve_model_short_id(client: ExoClient, model_arg: str) -> tuple[str, str]:
@@ -240,7 +314,11 @@ def run_one_completion(
 
     stats = out.get("generation_stats")
 
-    preview = (out.get("choices") or [{}])[0]["message"]["content"][:200]
+    # Extract preview, handling None content (common for thinking models)
+    choices = out.get("choices") or [{}]
+    message = choices[0].get("message", {}) if choices else {}
+    content = message.get("content") or ""
+    preview = content[:200] if content else ""
 
     return {
         "elapsed_s": elapsed,
@@ -277,12 +355,29 @@ class PromptSizer:
                 f"Target ({target}) is smaller than template overhead ({self.base_tokens})."
             )
 
-        content = ""
-        tok = self.count_fn(content)
+        # Estimate tokens per atom using a sample
+        sample_count = 100
+        sample_content = self.atom * sample_count
+        sample_tokens = self.count_fn(sample_content) - self.base_tokens
+        tokens_per_atom = sample_tokens / sample_count
 
-        while tok < target:
-            content += self.atom
-            tok = self.count_fn(content)
+        # Estimate starting point
+        needed_tokens = target - self.base_tokens
+        estimated_atoms = int(needed_tokens / tokens_per_atom)
+
+        # Binary search to find exact atom count
+        low, high = 0, estimated_atoms * 2 + 100
+        while low < high:
+            mid = (low + high) // 2
+            tok = self.count_fn(self.atom * mid)
+            if tok < target:
+                low = mid + 1
+            else:
+                high = mid
+
+        content = self.atom * low
+        tok = self.count_fn(content)
+        logger.info(f"{tok=}")
 
         if tok != target:
             raise RuntimeError(
@@ -348,7 +443,7 @@ def main() -> int:
         help="Warmup runs per placement (uses first pp/tg).",
     )
     ap.add_argument(
-        "--timeout", type=float, default=600.0, help="HTTP timeout (seconds)."
+        "--timeout", type=float, default=7200.0, help="HTTP timeout (seconds)."
     )
     ap.add_argument(
         "--json-out",
@@ -358,6 +453,11 @@ def main() -> int:
     ap.add_argument(
         "--dry-run", action="store_true", help="List selected placements and exit."
     )
+    ap.add_argument(
+        "--all-combinations",
+        action="store_true",
+        help="Force all pp×tg combinations (cartesian product) even when lists have equal length.",
+    )
     args = ap.parse_args()
 
     pp_list = parse_int_list(args.pp)
@@ -369,6 +469,15 @@ def main() -> int:
         logger.error("--repeat must be >= 1")
         return 2
 
+    # Log pairing mode
+    use_combinations = args.all_combinations or len(pp_list) != len(tg_list)
+    if use_combinations:
+        logger.info(
+            f"pp/tg mode: combinations (product) - {len(pp_list) * len(tg_list)} pairs"
+        )
+    else:
+        logger.info(f"pp/tg mode: tandem (zip) - {len(pp_list)} pairs")
+
     client = ExoClient(args.host, args.port, timeout_s=args.timeout)
     short_id, full_model_id = resolve_model_short_id(client, args.model)
 
@@ -377,10 +486,7 @@ def main() -> int:
     )
     previews = previews_resp.get("previews") or []
 
-    tokenizer = AutoTokenizer.from_pretrained(
-        full_model_id,
-        trust_remote_code=True,
-    )
+    tokenizer = load_tokenizer_for_bench(full_model_id)
     if tokenizer is None:
         raise RuntimeError("[exo-bench] tokenizer load failed")
 
@@ -486,60 +592,55 @@ def main() -> int:
                 )
                 logger.debug(f"  warmup {i + 1}/{args.warmup} done")
 
-            for pp in pp_list:
-                # if (
-                #     pp * n_nodes > 2048
-                #     and "ring" in instance_meta.lower()
-                #     and "tensor" in sharding.lower()
-                # ):
-                #     model_card = MODEL_CARDS[short_id]
-                #     if model_card.metadata.storage_size > Memory.from_gb(10):
-                #         logger.info(
-                #             f"Skipping tensor ring as this is too slow for model of size {model_card.metadata.storage_size} on {n_nodes=}"
-                #         )
-                #         continue
-                for tg in tg_list:
-                    runs: list[dict[str, Any]] = []
-                    for r in range(args.repeat):
-                        time.sleep(3)
-                        try:
-                            row, actual_pp_tokens = run_one_completion(
-                                client, full_model_id, pp, tg, prompt_sizer
-                            )
-                        except Exception as e:
-                            logger.error(e)
-                            continue
-                        row.update(
-                            {
-                                "model_short_id": short_id,
-                                "model_id": full_model_id,
-                                "placement_sharding": sharding,
-                                "placement_instance_meta": instance_meta,
-                                "placement_nodes": n_nodes,
-                                "instance_id": instance_id,
-                                "pp_tokens": actual_pp_tokens,
-                                "tg": tg,
-                                "repeat_index": r,
-                            }
-                        )
-                        runs.append(row)
-                        all_rows.append(row)
+            # If pp and tg lists have same length, run in tandem (zip)
+            # Otherwise (or if --all-combinations), run all combinations (cartesian product)
+            if use_combinations:
+                pp_tg_pairs = list(itertools.product(pp_list, tg_list))
+            else:
+                pp_tg_pairs = list(zip(pp_list, tg_list, strict=True))
 
-                    if runs:
-                        prompt_tps = mean(x["stats"]["prompt_tps"] for x in runs)
-                        gen_tps = mean(x["stats"]["generation_tps"] for x in runs)
-                        ptok = mean(x["stats"]["prompt_tokens"] for x in runs)
-                        gtok = mean(x["stats"]["generation_tokens"] for x in runs)
-                        peak = mean(
-                            x["stats"]["peak_memory_usage"]["inBytes"] for x in runs
+            for pp, tg in pp_tg_pairs:
+                runs: list[dict[str, Any]] = []
+                for r in range(args.repeat):
+                    time.sleep(3)
+                    try:
+                        row, actual_pp_tokens = run_one_completion(
+                            client, full_model_id, pp, tg, prompt_sizer
                         )
+                    except Exception as e:
+                        logger.error(e)
+                        continue
+                    row.update(
+                        {
+                            "model_short_id": short_id,
+                            "model_id": full_model_id,
+                            "placement_sharding": sharding,
+                            "placement_instance_meta": instance_meta,
+                            "placement_nodes": n_nodes,
+                            "instance_id": instance_id,
+                            "pp_tokens": actual_pp_tokens,
+                            "tg": tg,
+                            "repeat_index": r,
+                        }
+                    )
+                    runs.append(row)
+                    all_rows.append(row)
 
-                        logger.info(
-                            f"prompt_tps={prompt_tps:.2f} gen_tps={gen_tps:.2f}    "
-                            f"prompt_tokens={ptok} gen_tokens={gtok}    "
-                            f"peak_memory={format_peak_memory(peak)}\n"
-                        )
-                    time.sleep(2)
+                if runs:
+                    prompt_tps = mean(x["stats"]["prompt_tps"] for x in runs)
+                    gen_tps = mean(x["stats"]["generation_tps"] for x in runs)
+                    ptok = mean(x["stats"]["prompt_tokens"] for x in runs)
+                    gtok = mean(x["stats"]["generation_tokens"] for x in runs)
+                    peak = mean(
+                        x["stats"]["peak_memory_usage"]["inBytes"] for x in runs
+                    )
+
+                    logger.info(
+                        f"prompt_tps={prompt_tps:.2f} gen_tps={gen_tps:.2f}    "
+                        f"prompt_tokens={ptok} gen_tokens={gtok}    "
+                        f"peak_memory={format_peak_memory(peak)}\n"
+                    )
+                time.sleep(2)
         finally:
             try:
                 client.request_json("DELETE", f"/instance/{instance_id}")

dashboard/package-lock.json

@@ -14,12 +14,13 @@
 				"mode-watcher": "^1.1.0"
 			},
 			"devDependencies": {
+				"@playwright/test": "^1.41.0",
 				"@sveltejs/adapter-static": "^3.0.10",
 				"@sveltejs/kit": "^2.48.4",
 				"@sveltejs/vite-plugin-svelte": "^5.0.0",
 				"@tailwindcss/vite": "^4.0.0",
 				"@types/d3": "^7.4.3",
-				"@types/node": "^22",
+				"@types/node": "^22.19.8",
 				"d3": "^7.9.0",
 				"prettier": "^3.4.2",
 				"prettier-plugin-svelte": "^3.3.3",
@@ -518,6 +519,22 @@
 				"@jridgewell/sourcemap-codec": "^1.4.14"
 			}
 		},
+		"node_modules/@playwright/test": {
+			"version": "1.58.1",
+			"resolved": "https://registry.npmjs.org/@playwright/test/-/test-1.58.1.tgz",
+			"integrity": "sha512-6LdVIUERWxQMmUSSQi0I53GgCBYgM2RpGngCPY7hSeju+VrKjq3lvs7HpJoPbDiY5QM5EYRtRX5fvrinnMAz3w==",
+			"dev": true,
+			"license": "Apache-2.0",
+			"dependencies": {
+				"playwright": "1.58.1"
+			},
+			"bin": {
+				"playwright": "cli.js"
+			},
+			"engines": {
+				"node": ">=18"
+			}
+		},
 		"node_modules/@polka/url": {
 			"version": "1.0.0-next.29",
 			"resolved": "https://registry.npmjs.org/@polka/url/-/url-1.0.0-next.29.tgz",
@@ -865,7 +882,6 @@
 			"integrity": "sha512-oH8tXw7EZnie8FdOWYrF7Yn4IKrqTFHhXvl8YxXxbKwTMcD/5NNCryUSEXRk2ZR4ojnub0P8rNrsVGHXWqIDtA==",
 			"dev": true,
 			"license": "MIT",
-			"peer": true,
 			"dependencies": {
 				"@standard-schema/spec": "^1.0.0",
 				"@sveltejs/acorn-typescript": "^1.0.5",
@@ -905,7 +921,6 @@
 			"integrity": "sha512-Y1Cs7hhTc+a5E9Va/xwKlAJoariQyHY+5zBgCZg4PFWNYQ1nMN9sjK1zhw1gK69DuqVP++sht/1GZg1aRwmAXQ==",
 			"dev": true,
 			"license": "MIT",
-			"peer": true,
 			"dependencies": {
 				"@sveltejs/vite-plugin-svelte-inspector": "^4.0.1",
 				"debug": "^4.4.1",
@@ -1517,12 +1532,11 @@
 			"license": "MIT"
 		},
 		"node_modules/@types/node": {
-			"version": "22.19.1",
-			"resolved": "https://registry.npmjs.org/@types/node/-/node-22.19.1.tgz",
-			"integrity": "sha512-LCCV0HdSZZZb34qifBsyWlUmok6W7ouER+oQIGBScS8EsZsQbrtFTUrDX4hOl+CS6p7cnNC4td+qrSVGSCTUfQ==",
+			"version": "22.19.8",
+			"resolved": "https://registry.npmjs.org/@types/node/-/node-22.19.8.tgz",
+			"integrity": "sha512-ebO/Yl+EAvVe8DnMfi+iaAyIqYdK0q/q0y0rw82INWEKJOBe6b/P3YWE8NW7oOlF/nXFNrHwhARrN/hdgDkraA==",
 			"dev": true,
 			"license": "MIT",
-			"peer": true,
 			"dependencies": {
 				"undici-types": "~6.21.0"
 			}
@@ -1532,7 +1546,6 @@
 			"resolved": "https://registry.npmjs.org/acorn/-/acorn-8.15.0.tgz",
 			"integrity": "sha512-NZyJarBfL7nWwIq+FDL6Zp/yHEhePMNnnJ0y3qfieCrmNvYct8uvtiV41UvlSe6apAfk0fY1FbWx+NwfmpvtTg==",
 			"license": "MIT",
-			"peer": true,
 			"bin": {
 				"acorn": "bin/acorn"
 			},
@@ -1945,7 +1958,6 @@
 			"integrity": "sha512-fmTRWbNMmsmWq6xJV8D19U/gw/bwrHfNXxrIN+HfZgnzqTHp9jOmKMhsTUjXOJnZOdZY9Q28y4yebKzqDKlxlQ==",
 			"dev": true,
 			"license": "ISC",
-			"peer": true,
 			"engines": {
 				"node": ">=12"
 			}
@@ -2653,7 +2665,6 @@
 			"integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
 			"dev": true,
 			"license": "MIT",
-			"peer": true,
 			"engines": {
 				"node": ">=12"
 			},
@@ -2661,6 +2672,53 @@
 				"url": "https://github.com/sponsors/jonschlinkert"
 			}
 		},
+		"node_modules/playwright": {
+			"version": "1.58.1",
+			"resolved": "https://registry.npmjs.org/playwright/-/playwright-1.58.1.tgz",
+			"integrity": "sha512-+2uTZHxSCcxjvGc5C891LrS1/NlxglGxzrC4seZiVjcYVQfUa87wBL6rTDqzGjuoWNjnBzRqKmF6zRYGMvQUaQ==",
+			"dev": true,
+			"license": "Apache-2.0",
+			"dependencies": {
+				"playwright-core": "1.58.1"
+			},
+			"bin": {
+				"playwright": "cli.js"
+			},
+			"engines": {
+				"node": ">=18"
+			},
+			"optionalDependencies": {
+				"fsevents": "2.3.2"
+			}
+		},
+		"node_modules/playwright-core": {
+			"version": "1.58.1",
+			"resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.58.1.tgz",
+			"integrity": "sha512-bcWzOaTxcW+VOOGBCQgnaKToLJ65d6AqfLVKEWvexyS3AS6rbXl+xdpYRMGSRBClPvyj44njOWoxjNdL/H9UNg==",
+			"dev": true,
+			"license": "Apache-2.0",
+			"bin": {
+				"playwright-core": "cli.js"
+			},
+			"engines": {
+				"node": ">=18"
+			}
+		},
+		"node_modules/playwright/node_modules/fsevents": {
+			"version": "2.3.2",
+			"resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.2.tgz",
+			"integrity": "sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==",
+			"dev": true,
+			"hasInstallScript": true,
+			"license": "MIT",
+			"optional": true,
+			"os": [
+				"darwin"
+			],
+			"engines": {
+				"node": "^8.16.0 || ^10.6.0 || >=11.0.0"
+			}
+		},
 		"node_modules/postcss": {
 			"version": "8.5.6",
 			"resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.6.tgz",
@@ -2696,7 +2754,6 @@
 			"integrity": "sha512-UOnG6LftzbdaHZcKoPFtOcCKztrQ57WkHDeRD9t/PTQtmT0NHSeWWepj6pS0z/N7+08BHFDQVUrfmfMRcZwbMg==",
 			"dev": true,
 			"license": "MIT",
-			"peer": true,
 			"bin": {
 				"prettier": "bin/prettier.cjs"
 			},
@@ -2869,7 +2926,6 @@
 			"resolved": "https://registry.npmjs.org/svelte/-/svelte-5.45.3.tgz",
 			"integrity": "sha512-ngKXNhNvwPzF43QqEhDOue7TQTrG09em1sd4HBxVF0Wr2gopAmdEWan+rgbdgK4fhBtSOTJO8bYU4chUG7VXZQ==",
 			"license": "MIT",
-			"peer": true,
 			"dependencies": {
 				"@jridgewell/remapping": "^2.3.4",
 				"@jridgewell/sourcemap-codec": "^1.5.0",
@@ -3014,7 +3070,6 @@
 			"integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
 			"dev": true,
 			"license": "Apache-2.0",
-			"peer": true,
 			"bin": {
 				"tsc": "bin/tsc",
 				"tsserver": "bin/tsserver"
@@ -3036,7 +3091,6 @@
 			"integrity": "sha512-+Oxm7q9hDoLMyJOYfUYBuHQo+dkAloi33apOPP56pzj+vsdJDzr+j1NISE5pyaAuKL4A3UD34qd0lx5+kfKp2g==",
 			"dev": true,
 			"license": "MIT",
-			"peer": true,
 			"dependencies": {
 				"esbuild": "^0.25.0",
 				"fdir": "^6.4.4",

dashboard/package.json

@@ -8,18 +8,23 @@
 		"build": "vite build",
 		"preview": "vite preview",
 		"prepare": "svelte-kit sync || echo ''",
-		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json"
+		"check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
+		"test": "playwright test",
+		"test:e2e": "playwright test tests/e2e",
+		"test:visual": "playwright test tests/visual",
+		"test:update-snapshots": "playwright test tests/visual --update-snapshots"
 	},
 	"devDependencies": {
-		"prettier": "^3.4.2",
-		"prettier-plugin-svelte": "^3.3.3",
+		"@playwright/test": "^1.41.0",
 		"@sveltejs/adapter-static": "^3.0.10",
 		"@sveltejs/kit": "^2.48.4",
 		"@sveltejs/vite-plugin-svelte": "^5.0.0",
 		"@tailwindcss/vite": "^4.0.0",
 		"@types/d3": "^7.4.3",
-		"@types/node": "^22",
+		"@types/node": "^22.19.8",
 		"d3": "^7.9.0",
+		"prettier": "^3.4.2",
+		"prettier-plugin-svelte": "^3.3.3",
 		"svelte": "^5.0.0",
 		"svelte-check": "^4.0.0",
 		"tailwindcss": "^4.0.0",

dashboard/parts.nix

@@ -3,6 +3,61 @@
   perSystem =
     { pkgs, lib, ... }:
     let
+      # Filter source to ONLY include package.json and package-lock.json
+      # This ensures prettier-svelte only rebuilds when lockfiles change
+      dashboardLockfileSrc = lib.cleanSourceWith {
+        src = inputs.self;
+        filter =
+          path: type:
+          let
+            baseName = builtins.baseNameOf path;
+            isDashboardDir = baseName == "dashboard" && type == "directory";
+            isPackageFile =
+              (lib.hasInfix "/dashboard/" path || lib.hasSuffix "/dashboard" (builtins.dirOf path))
+              && (baseName == "package.json" || baseName == "package-lock.json");
+          in
+          isDashboardDir || isPackageFile;
+      };
+
+      # Stub source with lockfiles and minimal files for build to succeed
+      # This allows prettier-svelte to avoid rebuilding when dashboard source changes
+      dashboardStubSrc = pkgs.runCommand "dashboard-stub-src" { } ''
+        mkdir -p $out
+        cp ${dashboardLockfileSrc}/dashboard/package.json $out/
+        cp ${dashboardLockfileSrc}/dashboard/package-lock.json $out/
+        # Minimal files so vite build succeeds (produces empty output)
+        echo '<!DOCTYPE html><html><head></head><body></body></html>' > $out/index.html
+        mkdir -p $out/src
+        touch $out/src/app.html
+      '';
+
+      # Deps-only build using stub source (for prettier-svelte)
+      # Only rebuilds when package.json or package-lock.json change
+      dashboardDeps = inputs.dream2nix.lib.evalModules {
+        packageSets.nixpkgs = pkgs;
+        modules = [
+          ./dashboard.nix
+          {
+            paths.projectRoot = inputs.self;
+            paths.projectRootFile = "flake.nix";
+            paths.package = inputs.self + "/dashboard";
+          }
+          {
+            deps.dashboardSrc = lib.mkForce dashboardStubSrc;
+          }
+          # Override build phases to skip the actual build - just need node_modules
+          {
+            mkDerivation = {
+              buildPhase = lib.mkForce "true";
+              installPhase = lib.mkForce ''
+                runHook preInstall
+                runHook postInstall
+              '';
+            };
+          }
+        ];
+      };
+
       # Filter source to only include dashboard directory
       dashboardSrc = lib.cleanSourceWith {
         src = inputs.self;
@@ -42,11 +97,12 @@
       '';
 
       # Prettier with svelte plugin for treefmt
+      # Uses dashboardDeps instead of dashboardFull to avoid rebuilding on source changes
       packages.prettier-svelte = pkgs.writeShellScriptBin "prettier-svelte" ''
-        export NODE_PATH="${dashboardFull}/lib/node_modules/exo-dashboard/node_modules"
+        export NODE_PATH="${dashboardDeps}/lib/node_modules/exo-dashboard/node_modules"
         exec ${pkgs.nodejs}/bin/node \
-          ${dashboardFull}/lib/node_modules/exo-dashboard/node_modules/prettier/bin/prettier.cjs \
-          --plugin "${dashboardFull}/lib/node_modules/exo-dashboard/node_modules/prettier-plugin-svelte/plugin.js" \
+          ${dashboardDeps}/lib/node_modules/exo-dashboard/node_modules/prettier/bin/prettier.cjs \
+          --plugin "${dashboardDeps}/lib/node_modules/exo-dashboard/node_modules/prettier-plugin-svelte/plugin.js" \
           "$@"
       '';
     };

dashboard/playwright.config.ts

@@ -0,0 +1,43 @@
+/// <reference types="node" />
+import { defineConfig, devices } from "@playwright/test";
+
+export default defineConfig({
+  testDir: "./tests",
+  fullyParallel: true,
+  forbidOnly: !!process.env.CI,
+  retries: process.env.CI ? 2 : 0,
+  workers: process.env.CI ? 1 : undefined,
+  reporter: [["html", { open: "never" }], ["list"]],
+  use: {
+    baseURL: "http://localhost:52415",
+    trace: "on-first-retry",
+    video: "on",
+    screenshot: "only-on-failure",
+  },
+  projects: [
+    {
+      name: "chromium",
+      use: { ...devices["Desktop Chrome"] },
+    },
+  ],
+  webServer: {
+    command: "cd .. && uv run exo",
+    url: "http://localhost:52415/node_id",
+    reuseExistingServer: !process.env.CI,
+    timeout: 300000, // 5 minutes - CI needs time to install dependencies
+    env: {
+      ...process.env,
+      // Ensure macmon and system tools are accessible
+      PATH: `/usr/sbin:/usr/bin:/opt/homebrew/bin:${process.env.PATH}`,
+      // Override memory detection for CI (macmon may not work on CI runners)
+      // 24GB is typical for GitHub Actions macos-26 runners
+      ...(process.env.CI ? { OVERRIDE_MEMORY_MB: "24000" } : {}),
+    },
+  },
+  expect: {
+    toHaveScreenshot: {
+      maxDiffPixelRatio: 0.05,
+      threshold: 0.2,
+    },
+  },
+});

dashboard/src/lib/components/ChatForm.svelte

@@ -89,7 +89,10 @@
 
   const isImageModel = $derived(() => {
     if (!currentModel) return false;
-    return modelSupportsTextToImage(currentModel);
+    return (
+      modelSupportsTextToImage(currentModel) ||
+      modelSupportsImageEditing(currentModel)
+    );
   });
 
   const isEditOnlyWithoutImage = $derived(
@@ -404,6 +407,7 @@
           <!-- Custom dropdown -->
           <div class="relative flex-1 max-w-xs">
             <button
+              data-testid="chat-model-selector"
               bind:this={dropdownButtonRef}
               type="button"
               onclick={() => (isModelDropdownOpen = !isModelDropdownOpen)}
@@ -584,6 +588,7 @@
       >
 
       <textarea
+        data-testid="chat-input"
         bind:this={textareaRef}
         bind:value={message}
         onkeydown={handleKeydown}
@@ -603,6 +608,7 @@
       ></textarea>
 
       <button
+        data-testid="send-button"
         type="submit"
         disabled={!canSend || loading || isEditOnlyWithoutImage}
         class="px-2.5 sm:px-4 py-1.5 sm:py-2 rounded text-xs sm:text-xs tracking-[0.1em] sm:tracking-[0.15em] uppercase font-medium transition-all duration-200 whitespace-nowrap
@@ -646,6 +652,23 @@
             </svg>
             <span>EDIT</span>
           </span>
+        {:else if isEditOnlyWithoutImage}
+          <span class="inline-flex items-center gap-1.5">
+            <svg
+              class="w-3.5 h-3.5"
+              fill="none"
+              viewBox="0 0 24 24"
+              stroke="currentColor"
+              stroke-width="2"
+            >
+              <path
+                stroke-linecap="round"
+                stroke-linejoin="round"
+                d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z"
+              />
+            </svg>
+            <span>EDIT</span>
+          </span>
         {:else if isImageModel()}
           <span class="inline-flex items-center gap-1.5">
             <svg

dashboard/src/lib/components/ChatMessages.svelte

@@ -237,6 +237,9 @@
       class="group flex {message.role === 'user'
         ? 'justify-end'
         : 'justify-start'}"
+      data-testid={message.role === "user"
+        ? "user-message"
+        : "assistant-message"}
     >
       <div
         class={message.role === "user"

dashboard/src/lib/components/ImageParamsPanel.svelte

@@ -110,6 +110,36 @@
     setImageGenerationParams({ negativePrompt: value || null });
   }
 
+  function handleNumImagesChange(event: Event) {
+    const input = event.target as HTMLInputElement;
+    const value = input.value.trim();
+    if (value === "") {
+      setImageGenerationParams({ numImages: 1 });
+    } else {
+      const num = parseInt(value, 10);
+      if (!isNaN(num) && num >= 1) {
+        setImageGenerationParams({ numImages: num });
+      }
+    }
+  }
+
+  function handleStreamChange(enabled: boolean) {
+    setImageGenerationParams({ stream: enabled });
+  }
+
+  function handlePartialImagesChange(event: Event) {
+    const input = event.target as HTMLInputElement;
+    const value = input.value.trim();
+    if (value === "") {
+      setImageGenerationParams({ partialImages: 0 });
+    } else {
+      const num = parseInt(value, 10);
+      if (!isNaN(num) && num >= 0) {
+        setImageGenerationParams({ partialImages: num });
+      }
+    }
+  }
+
   function clearSteps() {
     setImageGenerationParams({ numInferenceSteps: null });
   }
@@ -134,90 +164,92 @@
 <div class="border-b border-exo-medium-gray/30 px-3 py-2">
   <!-- Basic params row -->
   <div class="flex items-center gap-3 flex-wrap">
-    <!-- Size -->
-    <div class="flex items-center gap-1.5">
-      <span class="text-xs text-exo-light-gray uppercase tracking-wider"
-        >SIZE:</span
-      >
-      <div class="relative">
-        <button
-          bind:this={sizeButtonRef}
-          type="button"
-          onclick={() => (isSizeDropdownOpen = !isSizeDropdownOpen)}
-          class="bg-exo-medium-gray/50 border border-exo-yellow/30 rounded pl-2 pr-6 py-1 text-xs font-mono text-exo-yellow cursor-pointer transition-all duration-200 hover:border-exo-yellow/50 focus:outline-none focus:border-exo-yellow/70 {isSizeDropdownOpen
-            ? 'border-exo-yellow/70'
-            : ''}"
+    <!-- Size (hidden in edit mode - output size comes from input image) -->
+    {#if !isEditMode}
+      <div class="flex items-center gap-1.5">
+        <span class="text-xs text-exo-light-gray uppercase tracking-wider"
+          >SIZE:</span
         >
-          {params.size}
-        </button>
-        <div
-          class="absolute right-1.5 top-1/2 -translate-y-1/2 pointer-events-none transition-transform duration-200 {isSizeDropdownOpen
-            ? 'rotate-180'
-            : ''}"
-        >
-          <svg
-            class="w-3 h-3 text-exo-yellow/60"
-            fill="none"
-            viewBox="0 0 24 24"
-            stroke="currentColor"
+        <div class="relative">
+          <button
+            bind:this={sizeButtonRef}
+            type="button"
+            onclick={() => (isSizeDropdownOpen = !isSizeDropdownOpen)}
+            class="bg-exo-medium-gray/50 border border-exo-yellow/30 rounded pl-2 pr-6 py-1 text-xs font-mono text-exo-yellow cursor-pointer transition-all duration-200 hover:border-exo-yellow/50 focus:outline-none focus:border-exo-yellow/70 {isSizeDropdownOpen
+              ? 'border-exo-yellow/70'
+              : ''}"
           >
-            <path
-              stroke-linecap="round"
-              stroke-linejoin="round"
-              stroke-width="2"
-              d="M19 9l-7 7-7-7"
-            />
-          </svg>
-        </div>
-      </div>
-
-      {#if isSizeDropdownOpen}
-        <!-- Backdrop to close dropdown -->
-        <button
-          type="button"
-          class="fixed inset-0 z-[9998] cursor-default"
-          onclick={() => (isSizeDropdownOpen = false)}
-          aria-label="Close dropdown"
-        ></button>
-
-        <!-- Dropdown Panel - fixed positioning to escape overflow:hidden -->
-        <div
-          class="fixed bg-exo-dark-gray border border-exo-yellow/30 rounded shadow-lg shadow-black/50 z-[9999] max-h-48 overflow-y-auto min-w-max"
-          style="bottom: calc(100vh - {sizeDropdownPosition()
-            .top}px + 4px); left: {sizeDropdownPosition().left}px;"
-        >
-          <div class="py-1">
-            {#each sizeOptions as size}
-              <button
-                type="button"
-                onclick={() => selectSize(size)}
-                class="w-full px-3 py-1.5 text-left text-xs font-mono tracking-wide transition-colors duration-100 flex items-center gap-2 {params.size ===
-                size
-                  ? 'bg-transparent text-exo-yellow'
-                  : 'text-exo-light-gray hover:text-exo-yellow'}"
-              >
-                {#if params.size === size}
-                  <svg
-                    class="w-3 h-3 flex-shrink-0"
-                    fill="currentColor"
-                    viewBox="0 0 20 20"
-                  >
-                    <path
-                      fill-rule="evenodd"
-                      d="M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z"
-                      clip-rule="evenodd"
-                    />
-                  </svg>
-                {:else}
-                  <span class="w-3"></span>
-                {/if}
-                <span>{size}</span>
-              </button>
-            {/each}
+            {params.size}
+          </button>
+          <div
+            class="absolute right-1.5 top-1/2 -translate-y-1/2 pointer-events-none transition-transform duration-200 {isSizeDropdownOpen
+              ? 'rotate-180'
+              : ''}"
+          >
+            <svg
+              class="w-3 h-3 text-exo-yellow/60"
+              fill="none"
+              viewBox="0 0 24 24"
+              stroke="currentColor"
+            >
+              <path
+                stroke-linecap="round"
+                stroke-linejoin="round"
+                stroke-width="2"
+                d="M19 9l-7 7-7-7"
+              />
+            </svg>
           </div>
         </div>
-      {/if}
-    </div>
+
+        {#if isSizeDropdownOpen}
+          <!-- Backdrop to close dropdown -->
+          <button
+            type="button"
+            class="fixed inset-0 z-[9998] cursor-default"
+            onclick={() => (isSizeDropdownOpen = false)}
+            aria-label="Close dropdown"
+          ></button>
+
+          <!-- Dropdown Panel - fixed positioning to escape overflow:hidden -->
+          <div
+            class="fixed bg-exo-dark-gray border border-exo-yellow/30 rounded shadow-lg shadow-black/50 z-[9999] max-h-48 overflow-y-auto min-w-max"
+            style="bottom: calc(100vh - {sizeDropdownPosition()
+              .top}px + 4px); left: {sizeDropdownPosition().left}px;"
+          >
+            <div class="py-1">
+              {#each sizeOptions as size}
+                <button
+                  type="button"
+                  onclick={() => selectSize(size)}
+                  class="w-full px-3 py-1.5 text-left text-xs font-mono tracking-wide transition-colors duration-100 flex items-center gap-2 {params.size ===
+                  size
+                    ? 'bg-transparent text-exo-yellow'
+                    : 'text-exo-light-gray hover:text-exo-yellow'}"
+                >
+                  {#if params.size === size}
+                    <svg
+                      class="w-3 h-3 flex-shrink-0"
+                      fill="currentColor"
+                      viewBox="0 0 20 20"
+                    >
+                      <path
+                        fill-rule="evenodd"
+                        d="M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z"
+                        clip-rule="evenodd"
+                      />
+                    </svg>
+                  {:else}
+                    <span class="w-3"></span>
+                  {/if}
+                  <span>{size}</span>
+                </button>
+              {/each}
+            </div>
+          </div>
+        {/if}
+      </div>
+    {/if}
 
     <!-- Quality -->
     <div class="flex items-center gap-1.5">
@@ -325,6 +357,59 @@
       </div>
     </div>
 
+    <!-- Number of Images (not in edit mode) -->
+    {#if !isEditMode}
+      <div class="flex items-center gap-1.5">
+        <span class="text-xs text-exo-light-gray uppercase tracking-wider"
+          >IMAGES:</span
+        >
+        <input
+          type="number"
+          min="1"
+          value={params.numImages}
+          oninput={handleNumImagesChange}
+          class="w-12 bg-exo-medium-gray/50 border border-exo-yellow/30 rounded px-2 py-1 text-xs font-mono text-exo-yellow text-center transition-all duration-200 hover:border-exo-yellow/50 focus:outline-none focus:border-exo-yellow/70"
+        />
+      </div>
+    {/if}
+
+    <!-- Stream toggle -->
+    <div class="flex items-center gap-1.5">
+      <span class="text-xs text-exo-light-gray uppercase tracking-wider"
+        >STREAM:</span
+      >
+      <button
+        type="button"
+        onclick={() => handleStreamChange(!params.stream)}
+        class="w-8 h-4 rounded-full transition-all duration-200 cursor-pointer relative {params.stream
+          ? 'bg-exo-yellow'
+          : 'bg-exo-medium-gray/50 border border-exo-yellow/30'}"
+        title={params.stream ? "Streaming enabled" : "Streaming disabled"}
+      >
+        <div
+          class="absolute top-0.5 w-3 h-3 rounded-full transition-all duration-200 {params.stream
+            ? 'right-0.5 bg-exo-black'
+            : 'left-0.5 bg-exo-light-gray'}"
+        ></div>
+      </button>
+    </div>
+
+    <!-- Partial Images (only when streaming) -->
+    {#if params.stream}
+      <div class="flex items-center gap-1.5">
+        <span class="text-xs text-exo-light-gray uppercase tracking-wider"
+          >PARTIALS:</span
+        >
+        <input
+          type="number"
+          min="0"
+          value={params.partialImages}
+          oninput={handlePartialImagesChange}
+          class="w-12 bg-exo-medium-gray/50 border border-exo-yellow/30 rounded px-2 py-1 text-xs font-mono text-exo-yellow text-center transition-all duration-200 hover:border-exo-yellow/50 focus:outline-none focus:border-exo-yellow/70"
+        />
+      </div>
+    {/if}
+
     <!-- Input Fidelity (edit mode only) -->
     {#if isEditMode}
       <div class="flex items-center gap-1.5">

dashboard/src/lib/components/ModelCard.svelte

@@ -977,6 +977,7 @@
 
     <!-- Launch Button -->
     <button
+      data-testid="launch-button"
       onclick={onLaunch}
       disabled={isLaunching || !canFit}
       class="w-full py-2 text-sm font-mono tracking-wider uppercase border transition-all duration-200

dashboard/src/routes/+page.svelte

@@ -1663,12 +1663,14 @@
         <div
           class="flex-1 relative bg-exo-dark-gray/40 rounded-lg overflow-hidden"
         >
-          <TopologyGraph
-            class="w-full h-full"
-            highlightedNodes={highlightedNodes()}
-            filteredNodes={nodeFilter}
-            onNodeClick={togglePreviewNodeFilter}
-          />
+          <div data-testid="topology-graph" class="w-full h-full">
+            <TopologyGraph
+              class="w-full h-full"
+              highlightedNodes={highlightedNodes()}
+              filteredNodes={nodeFilter}
+              onNodeClick={togglePreviewNodeFilter}
+            />
+          </div>
 
           <!-- Thunderbolt Bridge Cycle Warning -->
           {#if tbBridgeCycles.length > 0}
@@ -1782,12 +1784,14 @@
             class="flex-1 relative bg-exo-dark-gray/40 mx-4 mb-4 rounded-lg overflow-hidden"
           >
             <!-- The main topology graph - full container -->
-            <TopologyGraph
-              class="w-full h-full"
-              highlightedNodes={highlightedNodes()}
-              filteredNodes={nodeFilter}
-              onNodeClick={togglePreviewNodeFilter}
-            />
+            <div data-testid="topology-graph" class="w-full h-full">
+              <TopologyGraph
+                class="w-full h-full"
+                highlightedNodes={highlightedNodes()}
+                filteredNodes={nodeFilter}
+                onNodeClick={togglePreviewNodeFilter}
+              />
+            </div>
 
             <!-- Thunderbolt Bridge Cycle Warning -->
             {#if tbBridgeCycles.length > 0}
@@ -2363,6 +2367,7 @@
             <!-- Model Dropdown (Custom) -->
             <div class="flex-shrink-0 mb-3 relative">
               <button
+                data-testid="model-dropdown"
                 type="button"
                 onclick={() => (isModelDropdownOpen = !isModelDropdownOpen)}
                 class="w-full bg-exo-medium-gray/50 border border-exo-yellow/30 rounded pl-3 pr-8 py-2.5 text-sm font-mono text-left tracking-wide cursor-pointer transition-all duration-200 hover:border-exo-yellow/50 focus:outline-none focus:border-exo-yellow/70 {isModelDropdownOpen
@@ -2499,6 +2504,7 @@
                         model.id,
                       )}
                       <button
+                        data-testid="model-option"
                         type="button"
                         onclick={() => {
                           if (modelCanFit) {
@@ -2777,6 +2783,7 @@
                     {#each allPreviews as apiPreview, i}
                       <div
                         role="group"
+                        data-testid="model-card"
                         onmouseenter={() => {
                           if (apiPreview.memory_delta_by_node) {
                             hoveredPreviewNodes = new Set(

dashboard/src/routes/downloads/+page.svelte

@@ -6,6 +6,8 @@
     type DownloadProgress,
     refreshState,
     lastUpdate as lastUpdateStore,
+    startDownload,
+    deleteDownload,
   } from "$lib/stores/app.svelte";
   import HeaderNav from "$lib/components/HeaderNav.svelte";
 
@@ -28,6 +30,7 @@
     etaMs: number;
     status: "completed" | "downloading";
     files: FileProgress[];
+    shardMetadata?: Record<string, unknown>;
   };
 
   type NodeEntry = {
@@ -269,6 +272,12 @@
             }
           }
 
+          // Extract shard_metadata for use with download actions
+          const shardMetadata = (downloadPayload.shard_metadata ??
+            downloadPayload.shardMetadata) as
+            | Record<string, unknown>
+            | undefined;
+
           const entry: ModelEntry = {
             modelId,
             prettyName,
@@ -285,6 +294,7 @@
                 ? "completed"
                 : "downloading",
             files,
+            shardMetadata,
           };
 
           const existing = modelMap.get(modelId);
@@ -469,6 +479,52 @@
                     >
                       {pct.toFixed(1)}%
                     </span>
+                    {#if model.status !== "completed" && model.shardMetadata}
+                      <button
+                        type="button"
+                        class="text-exo-light-gray hover:text-exo-yellow transition-colors"
+                        onclick={() =>
+                          startDownload(node.nodeId, model.shardMetadata!)}
+                        title="Start download"
+                      >
+                        <svg
+                          class="w-4 h-4"
+                          viewBox="0 0 20 20"
+                          fill="none"
+                          stroke="currentColor"
+                          stroke-width="2"
+                        >
+                          <path
+                            d="M10 3v10m0 0l-3-3m3 3l3-3M3 17h14"
+                            stroke-linecap="round"
+                            stroke-linejoin="round"
+                          ></path>
+                        </svg>
+                      </button>
+                    {/if}
+                    {#if model.status === "completed"}
+                      <button
+                        type="button"
+                        class="text-exo-light-gray hover:text-red-400 transition-colors"
+                        onclick={() =>
+                          deleteDownload(node.nodeId, model.modelId)}
+                        title="Delete download"
+                      >
+                        <svg
+                          class="w-4 h-4"
+                          viewBox="0 0 20 20"
+                          fill="none"
+                          stroke="currentColor"
+                          stroke-width="2"
+                        >
+                          <path
+                            d="M4 6h12M8 6V4h4v2m1 0v10a1 1 0 01-1 1H8a1 1 0 01-1-1V6h6"
+                            stroke-linecap="round"
+                            stroke-linejoin="round"
+                          ></path>
+                        </svg>
+                      </button>
+                    {/if}
                     <button
                       type="button"
                       class="text-exo-light-gray hover:text-exo-yellow transition-colors"

dashboard/src/routes/traces/+page.svelte

@@ -0,0 +1,190 @@
+<script lang="ts">
+  import { onMount } from "svelte";
+  import {
+    listTraces,
+    getTraceRawUrl,
+    type TraceListItem,
+  } from "$lib/stores/app.svelte";
+  import HeaderNav from "$lib/components/HeaderNav.svelte";
+
+  let traces = $state<TraceListItem[]>([]);
+  let loading = $state(true);
+  let error = $state<string | null>(null);
+
+  function formatBytes(bytes: number): string {
+    if (!bytes || bytes <= 0) return "0B";
+    const units = ["B", "KB", "MB", "GB"];
+    const i = Math.min(
+      Math.floor(Math.log(bytes) / Math.log(1024)),
+      units.length - 1,
+    );
+    const val = bytes / Math.pow(1024, i);
+    return `${val.toFixed(val >= 10 ? 0 : 1)}${units[i]}`;
+  }
+
+  function formatDate(isoString: string): string {
+    const date = new Date(isoString);
+    return date.toLocaleString();
+  }
+
+  async function downloadTrace(taskId: string) {
+    const response = await fetch(getTraceRawUrl(taskId));
+    const blob = await response.blob();
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement("a");
+    a.href = url;
+    a.download = `trace_${taskId}.json`;
+    a.click();
+    URL.revokeObjectURL(url);
+  }
+
+  async function openInPerfetto(taskId: string) {
+    // Fetch trace data from our local API
+    const response = await fetch(getTraceRawUrl(taskId));
+    const traceData = await response.arrayBuffer();
+
+    // Open Perfetto UI
+    const perfettoWindow = window.open("https://ui.perfetto.dev");
+    if (!perfettoWindow) {
+      alert("Failed to open Perfetto. Please allow popups.");
+      return;
+    }
+
+    // Wait for Perfetto to be ready, then send trace via postMessage
+    const onMessage = (e: MessageEvent) => {
+      if (e.data === "PONG") {
+        window.removeEventListener("message", onMessage);
+        perfettoWindow.postMessage(
+          {
+            perfetto: {
+              buffer: traceData,
+              title: `Trace ${taskId}`,
+            },
+          },
+          "https://ui.perfetto.dev",
+        );
+      }
+    };
+    window.addEventListener("message", onMessage);
+
+    // Ping Perfetto until it responds
+    const pingInterval = setInterval(() => {
+      perfettoWindow.postMessage("PING", "https://ui.perfetto.dev");
+    }, 50);
+
+    // Clean up after 10 seconds
+    setTimeout(() => {
+      clearInterval(pingInterval);
+      window.removeEventListener("message", onMessage);
+    }, 10000);
+  }
+
+  async function refresh() {
+    loading = true;
+    error = null;
+    try {
+      const response = await listTraces();
+      traces = response.traces;
+    } catch (e) {
+      error = e instanceof Error ? e.message : "Failed to load traces";
+    } finally {
+      loading = false;
+    }
+  }
+
+  onMount(() => {
+    refresh();
+  });
+</script>
+
+<div class="min-h-screen bg-exo-dark-gray text-white">
+  <HeaderNav showHome={true} />
+  <div class="max-w-7xl mx-auto px-4 lg:px-8 py-6 space-y-6">
+    <div class="flex items-center justify-between gap-4 flex-wrap">
+      <div>
+        <h1
+          class="text-2xl font-mono tracking-[0.2em] uppercase text-exo-yellow"
+        >
+          Traces
+        </h1>
+      </div>
+      <div class="flex items-center gap-3">
+        <button
+          type="button"
+          class="text-xs font-mono text-exo-light-gray hover:text-exo-yellow transition-colors uppercase border border-exo-medium-gray/40 px-2 py-1 rounded"
+          onclick={refresh}
+          disabled={loading}
+        >
+          Refresh
+        </button>
+      </div>
+    </div>
+
+    {#if loading}
+      <div
+        class="rounded border border-exo-medium-gray/30 bg-exo-black/30 p-6 text-center text-exo-light-gray"
+      >
+        <div class="text-sm">Loading traces...</div>
+      </div>
+    {:else if error}
+      <div
+        class="rounded border border-red-500/30 bg-red-500/10 p-6 text-center text-red-400"
+      >
+        <div class="text-sm">{error}</div>
+      </div>
+    {:else if traces.length === 0}
+      <div
+        class="rounded border border-exo-medium-gray/30 bg-exo-black/30 p-6 text-center text-exo-light-gray space-y-2"
+      >
+        <div class="text-sm">No traces found.</div>
+        <div class="text-xs text-exo-light-gray/70">
+          Run exo with EXO_TRACING_ENABLED=1 to collect traces.
+        </div>
+      </div>
+    {:else}
+      <div class="space-y-3">
+        {#each traces as trace}
+          <div
+            class="rounded border border-exo-medium-gray/30 bg-exo-black/30 p-4 flex items-center justify-between gap-4"
+          >
+            <div class="min-w-0 flex-1">
+              <a
+                href="#/traces/{trace.taskId}"
+                class="text-sm font-mono text-white hover:text-exo-yellow transition-colors truncate block"
+              >
+                {trace.taskId}
+              </a>
+              <div class="text-xs text-exo-light-gray font-mono mt-1">
+                {formatDate(trace.createdAt)} &bull; {formatBytes(
+                  trace.fileSize,
+                )}
+              </div>
+            </div>
+            <div class="flex items-center gap-2 shrink-0">
+              <a
+                href="#/traces/{trace.taskId}"
+                class="text-xs font-mono text-exo-light-gray hover:text-exo-yellow transition-colors uppercase border border-exo-medium-gray/40 px-2 py-1 rounded"
+              >
+                View Stats
+              </a>
+              <button
+                type="button"
+                class="text-xs font-mono text-exo-light-gray hover:text-exo-yellow transition-colors uppercase border border-exo-medium-gray/40 px-2 py-1 rounded"
+                onclick={() => downloadTrace(trace.taskId)}
+              >
+                Download
+              </button>
+              <button
+                type="button"
+                class="text-xs font-mono text-exo-dark-gray bg-exo-yellow hover:bg-exo-yellow/90 transition-colors uppercase px-2 py-1 rounded font-semibold"
+                onclick={() => openInPerfetto(trace.taskId)}
+              >
+                View Trace
+              </button>
+            </div>
+          </div>
+        {/each}
+      </div>
+    {/if}
+  </div>
+</div>

dashboard/src/routes/traces/[taskId]/+page.svelte

@@ -0,0 +1,367 @@
+<script lang="ts">
+  import { page } from "$app/stores";
+  import { onMount } from "svelte";
+  import {
+    fetchTraceStats,
+    getTraceRawUrl,
+    type TraceStatsResponse,
+    type TraceCategoryStats,
+  } from "$lib/stores/app.svelte";
+  import HeaderNav from "$lib/components/HeaderNav.svelte";
+
+  const taskId = $derived($page.params.taskId);
+
+  let stats = $state<TraceStatsResponse | null>(null);
+  let loading = $state(true);
+  let error = $state<string | null>(null);
+
+  function formatDuration(us: number): string {
+    if (us < 1000) return `${us.toFixed(0)}us`;
+    if (us < 1_000_000) return `${(us / 1000).toFixed(2)}ms`;
+    return `${(us / 1_000_000).toFixed(2)}s`;
+  }
+
+  function formatPercentage(part: number, total: number): string {
+    if (total === 0) return "0.0%";
+    return `${((part / total) * 100).toFixed(1)}%`;
+  }
+
+  // Parse hierarchical categories like "sync/compute" into phases
+  type PhaseData = {
+    name: string;
+    subcategories: { name: string; stats: TraceCategoryStats }[];
+    totalUs: number; // From outer span (e.g., "sync" category)
+    stepCount: number; // Count of outer span events
+  };
+
+  function parsePhases(
+    byCategory: Record<string, TraceCategoryStats>,
+  ): PhaseData[] {
+    const phases = new Map<
+      string,
+      {
+        subcats: Map<string, TraceCategoryStats>;
+        outerStats: TraceCategoryStats | null;
+      }
+    >();
+
+    for (const [category, catStats] of Object.entries(byCategory)) {
+      if (category.includes("/")) {
+        const [phase, subcat] = category.split("/", 2);
+        if (!phases.has(phase)) {
+          phases.set(phase, { subcats: new Map(), outerStats: null });
+        }
+        phases.get(phase)!.subcats.set(subcat, catStats);
+      } else {
+        // Outer span - this IS the phase total
+        if (!phases.has(category)) {
+          phases.set(category, { subcats: new Map(), outerStats: null });
+        }
+        phases.get(category)!.outerStats = catStats;
+      }
+    }
+
+    return Array.from(phases.entries())
+      .filter(([_, data]) => data.outerStats !== null) // Only phases with outer spans
+      .map(([name, data]) => ({
+        name,
+        subcategories: Array.from(data.subcats.entries())
+          .map(([subName, subStats]) => ({ name: subName, stats: subStats }))
+          .sort((a, b) => b.stats.totalUs - a.stats.totalUs),
+        totalUs: data.outerStats!.totalUs, // Outer span total
+        stepCount: data.outerStats!.count, // Number of steps
+      }))
+      .sort((a, b) => b.totalUs - a.totalUs);
+  }
+
+  async function downloadTrace() {
+    if (!taskId) return;
+    const response = await fetch(getTraceRawUrl(taskId));
+    const blob = await response.blob();
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement("a");
+    a.href = url;
+    a.download = `trace_${taskId}.json`;
+    a.click();
+    URL.revokeObjectURL(url);
+  }
+
+  async function openInPerfetto() {
+    if (!taskId) return;
+
+    // Fetch trace data from our local API
+    const response = await fetch(getTraceRawUrl(taskId));
+    const traceData = await response.arrayBuffer();
+
+    // Open Perfetto UI
+    const perfettoWindow = window.open("https://ui.perfetto.dev");
+    if (!perfettoWindow) {
+      alert("Failed to open Perfetto. Please allow popups.");
+      return;
+    }
+
+    // Wait for Perfetto to be ready, then send trace via postMessage
+    const onMessage = (e: MessageEvent) => {
+      if (e.data === "PONG") {
+        window.removeEventListener("message", onMessage);
+        perfettoWindow.postMessage(
+          {
+            perfetto: {
+              buffer: traceData,
+              title: `Trace ${taskId}`,
+            },
+          },
+          "https://ui.perfetto.dev",
+        );
+      }
+    };
+    window.addEventListener("message", onMessage);
+
+    // Ping Perfetto until it responds
+    const pingInterval = setInterval(() => {
+      perfettoWindow.postMessage("PING", "https://ui.perfetto.dev");
+    }, 50);
+
+    // Clean up after 10 seconds
+    setTimeout(() => {
+      clearInterval(pingInterval);
+      window.removeEventListener("message", onMessage);
+    }, 10000);
+  }
+
+  onMount(async () => {
+    if (!taskId) {
+      error = "No task ID provided";
+      loading = false;
+      return;
+    }
+
+    try {
+      stats = await fetchTraceStats(taskId);
+    } catch (e) {
+      error = e instanceof Error ? e.message : "Failed to load trace";
+    } finally {
+      loading = false;
+    }
+  });
+
+  const phases = $derived(stats ? parsePhases(stats.byCategory) : []);
+  const sortedRanks = $derived(
+    stats
+      ? Object.keys(stats.byRank)
+          .map(Number)
+          .sort((a, b) => a - b)
+      : [],
+  );
+  const nodeCount = $derived(sortedRanks.length || 1);
+</script>
+
+<div class="min-h-screen bg-exo-dark-gray text-white">
+  <HeaderNav showHome={true} />
+  <div class="max-w-7xl mx-auto px-4 lg:px-8 py-6 space-y-6">
+    <div class="flex items-center justify-between gap-4 flex-wrap">
+      <div>
+        <h1
+          class="text-2xl font-mono tracking-[0.2em] uppercase text-exo-yellow"
+        >
+          Trace
+        </h1>
+        <p class="text-sm text-exo-light-gray font-mono truncate max-w-lg">
+          {taskId}
+        </p>
+      </div>
+      <div class="flex items-center gap-3">
+        <a
+          href="#/traces"
+          class="text-xs font-mono text-exo-light-gray hover:text-exo-yellow transition-colors uppercase border border-exo-medium-gray/40 px-3 py-1.5 rounded"
+        >
+          All Traces
+        </a>
+        <button
+          type="button"
+          class="text-xs font-mono text-exo-light-gray hover:text-exo-yellow transition-colors uppercase border border-exo-medium-gray/40 px-3 py-1.5 rounded"
+          onclick={downloadTrace}
+          disabled={loading || !!error}
+        >
+          Download
+        </button>
+        <button
+          type="button"
+          class="text-xs font-mono text-exo-dark-gray bg-exo-yellow hover:bg-exo-yellow/90 transition-colors uppercase px-3 py-1.5 rounded font-semibold"
+          onclick={openInPerfetto}
+          disabled={loading || !!error}
+        >
+          View Trace
+        </button>
+      </div>
+    </div>
+
+    {#if loading}
+      <div
+        class="rounded border border-exo-medium-gray/30 bg-exo-black/30 p-6 text-center text-exo-light-gray"
+      >
+        <div class="text-sm">Loading trace data...</div>
+      </div>
+    {:else if error}
+      <div
+        class="rounded border border-red-500/30 bg-red-500/10 p-6 text-center text-red-400"
+      >
+        <div class="text-sm">{error}</div>
+      </div>
+    {:else if stats}
+      <!-- Wall Time Summary -->
+      <div
+        class="rounded border border-exo-medium-gray/30 bg-exo-black/30 p-4 space-y-2"
+      >
+        <h2
+          class="text-sm font-mono uppercase tracking-wider text-exo-light-gray"
+        >
+          Summary
+        </h2>
+        <div class="text-3xl font-mono text-exo-yellow">
+          {formatDuration(stats.totalWallTimeUs)}
+        </div>
+        <div class="text-xs text-exo-light-gray">Total wall time</div>
+      </div>
+
+      <!-- By Phase -->
+      {#if phases.length > 0}
+        <div
+          class="rounded border border-exo-medium-gray/30 bg-exo-black/30 p-4 space-y-4"
+        >
+          <h2
+            class="text-sm font-mono uppercase tracking-wider text-exo-light-gray"
+          >
+            By Phase <span class="text-exo-light-gray/50">(avg per node)</span>
+          </h2>
+          <div class="space-y-4">
+            {#each phases as phase}
+              {@const normalizedTotal = phase.totalUs / nodeCount}
+              {@const normalizedStepCount = phase.stepCount / nodeCount}
+              <div class="space-y-2">
+                <div class="flex items-center justify-between">
+                  <span class="text-sm font-mono text-white">{phase.name}</span>
+                  <span class="text-sm font-mono">
+                    <span class="text-exo-yellow"
+                      >{formatDuration(normalizedTotal)}</span
+                    >
+                    <span class="text-exo-light-gray ml-2">
+                      ({normalizedStepCount} steps, {formatDuration(
+                        normalizedTotal / normalizedStepCount,
+                      )}/step)
+                    </span>
+                  </span>
+                </div>
+                {#if phase.subcategories.length > 0}
+                  <div class="pl-4 space-y-1.5">
+                    {#each phase.subcategories as subcat}
+                      {@const normalizedSubcat =
+                        subcat.stats.totalUs / nodeCount}
+                      {@const pct = formatPercentage(
+                        normalizedSubcat,
+                        normalizedTotal,
+                      )}
+                      {@const perStep = normalizedSubcat / normalizedStepCount}
+                      <div
+                        class="flex items-center justify-between text-xs font-mono"
+                      >
+                        <span class="text-exo-light-gray">{subcat.name}</span>
+                        <span class="text-white">
+                          {formatDuration(normalizedSubcat)}
+                          <span class="text-exo-light-gray ml-2">({pct})</span>
+                          <span class="text-exo-light-gray/60 ml-2"
+                            >{formatDuration(perStep)}/step</span
+                          >
+                        </span>
+                      </div>
+                      <!-- Progress bar -->
+                      <div
+                        class="relative h-1.5 bg-exo-black/60 rounded-sm overflow-hidden"
+                      >
+                        <div
+                          class="absolute inset-y-0 left-0 bg-gradient-to-r from-exo-yellow to-exo-yellow/70 transition-all duration-300"
+                          style="width: {pct}"
+                        ></div>
+                      </div>
+                    {/each}
+                  </div>
+                {/if}
+              </div>
+            {/each}
+          </div>
+        </div>
+      {/if}
+
+      <!-- By Rank -->
+      {#if sortedRanks.length > 0}
+        <div
+          class="rounded border border-exo-medium-gray/30 bg-exo-black/30 p-4 space-y-4"
+        >
+          <h2
+            class="text-sm font-mono uppercase tracking-wider text-exo-light-gray"
+          >
+            By Rank
+          </h2>
+          <div class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
+            {#each sortedRanks as rank}
+              {@const rankStats = stats.byRank[rank]}
+              {@const rankPhases = parsePhases(rankStats.byCategory)}
+              <div
+                class="rounded border border-exo-medium-gray/20 bg-exo-dark-gray/60 p-3 space-y-3"
+              >
+                <div class="text-sm font-mono text-exo-yellow">
+                  Rank {rank}
+                </div>
+                <div class="space-y-2">
+                  {#each rankPhases as phase}
+                    <div class="space-y-1">
+                      <div class="flex items-center justify-between text-xs">
+                        <span class="font-mono text-exo-light-gray"
+                          >{phase.name}</span
+                        >
+                        <span class="font-mono text-white">
+                          {formatDuration(phase.totalUs)}
+                          <span class="text-exo-light-gray/50 ml-1">
+                            ({phase.stepCount}x)
+                          </span>
+                        </span>
+                      </div>
+                      {#if phase.subcategories.length > 0}
+                        <div class="pl-2 space-y-0.5">
+                          {#each phase.subcategories as subcat}
+                            {@const pct = formatPercentage(
+                              subcat.stats.totalUs,
+                              phase.totalUs,
+                            )}
+                            {@const perStep =
+                              subcat.stats.totalUs / phase.stepCount}
+                            <div
+                              class="flex items-center justify-between text-[10px] font-mono"
+                            >
+                              <span class="text-exo-light-gray/70"
+                                >{subcat.name}</span
+                              >
+                              <span class="text-exo-light-gray">
+                                {formatDuration(subcat.stats.totalUs)}
+                                <span class="text-exo-light-gray/50"
+                                  >({pct})</span
+                                >
+                                <span class="text-exo-light-gray/30 ml-1"
+                                  >{formatDuration(perStep)}/step</span
+                                >
+                              </span>
+                            </div>
+                          {/each}
+                        </div>
+                      {/if}
+                    </div>
+                  {/each}
+                </div>
+              </div>
+            {/each}
+          </div>
+        </div>
+      {/if}
+    {/if}
+  </div>
+</div>

dashboard/tests/e2e/chat-message.spec.ts

@@ -0,0 +1,68 @@
+import { test, expect } from "@playwright/test";
+import {
+  waitForTopologyLoaded,
+  waitForModelCards,
+  waitForChatReady,
+  waitForAssistantMessage,
+  sendChatMessage,
+  selectModelFromLaunchDropdown,
+} from "../helpers/wait-for-ready";
+
+test.describe("Chat Message", () => {
+  test("should send a message and receive a response", async ({ page }) => {
+    // Increase timeout for this test since it involves model loading and inference
+    test.setTimeout(600000); // 10 minutes
+
+    await page.goto("/");
+    await waitForTopologyLoaded(page);
+
+    // First select the model from the dropdown (model cards appear after selection)
+    await selectModelFromLaunchDropdown(page, /qwen.*0\.6b/i);
+
+    // Now wait for model cards to appear
+    await waitForModelCards(page);
+
+    // Find and click on the model card (should already be filtered to Qwen)
+    const modelCard = page.locator('[data-testid="model-card"]').first();
+    await expect(modelCard).toBeVisible({ timeout: 10000 });
+
+    // Click the launch button
+    const launchButton = modelCard.locator('[data-testid="launch-button"]');
+    await launchButton.click();
+
+    // Wait for the model to be ready (may take time to download)
+    await expect(
+      page
+        .locator('[data-testid="instance-status"]')
+        .filter({ hasText: /READY/i })
+        .first(),
+    ).toBeVisible({ timeout: 300000 }); // 5 minutes for download
+
+    // Wait for chat to be ready
+    await waitForChatReady(page);
+
+    // Select the model in the chat selector if needed
+    const modelSelector = page.locator('[data-testid="chat-model-selector"]');
+    if (await modelSelector.isVisible()) {
+      await modelSelector.click();
+      await page.locator("text=/qwen.*0\\.6b/i").first().click();
+    }
+
+    // Send a simple message
+    await sendChatMessage(page, "What is 2+2?");
+
+    // Wait for assistant response
+    await waitForAssistantMessage(page, 120000); // 2 minutes for inference
+
+    // Verify the assistant message is visible
+    const assistantMessage = page
+      .locator('[data-testid="assistant-message"]')
+      .last();
+    await expect(assistantMessage).toBeVisible();
+
+    // The response should contain something (not empty)
+    const messageContent = await assistantMessage.textContent();
+    expect(messageContent).toBeTruthy();
+    expect(messageContent!.length).toBeGreaterThan(0);
+  });
+});

dashboard/tests/e2e/launch-instance.spec.ts

@@ -0,0 +1,36 @@
+import { test, expect } from "@playwright/test";
+import {
+  waitForTopologyLoaded,
+  waitForModelCards,
+  selectModelFromLaunchDropdown,
+} from "../helpers/wait-for-ready";
+
+test.describe("Launch Instance", () => {
+  test("should launch Qwen3-0.6B-4bit model", async ({ page }) => {
+    await page.goto("/");
+    await waitForTopologyLoaded(page);
+
+    // First select the model from the dropdown (model cards appear after selection)
+    await selectModelFromLaunchDropdown(page, /qwen.*0\.6b/i);
+
+    // Now wait for model cards to appear
+    await waitForModelCards(page);
+
+    // Find and click on the model card (should already be filtered to Qwen)
+    const modelCard = page.locator('[data-testid="model-card"]').first();
+    await expect(modelCard).toBeVisible({ timeout: 10000 });
+
+    // Click the launch button
+    const launchButton = modelCard.locator('[data-testid="launch-button"]');
+    await launchButton.click();
+
+    // Wait for the model to start (status should change to READY or show download progress)
+    // The model may need to download first, so we wait with a longer timeout
+    await expect(
+      page
+        .locator('[data-testid="instance-status"]')
+        .filter({ hasText: /READY|downloading/i })
+        .first(),
+    ).toBeVisible({ timeout: 300000 }); // 5 minutes for download
+  });
+});

dashboard/tests/helpers/wait-for-ready.ts

@@ -0,0 +1,117 @@
+import { expect, type Page } from "@playwright/test";
+
+const BASE_URL = "http://localhost:52415";
+
+export async function waitForApiReady(
+  page: Page,
+  timeoutMs = 30000,
+): Promise<void> {
+  const startTime = Date.now();
+  while (Date.now() - startTime < timeoutMs) {
+    try {
+      const response = await page.request.get(`${BASE_URL}/node_id`);
+      if (response.ok()) {
+        return;
+      }
+    } catch {
+      // API not ready yet, continue polling
+    }
+    await page.waitForTimeout(500);
+  }
+  throw new Error(`API did not become ready within ${timeoutMs}ms`);
+}
+
+export async function waitForTopologyLoaded(page: Page): Promise<void> {
+  await expect(page.locator('[data-testid="topology-graph"]')).toBeVisible({
+    timeout: 30000,
+  });
+}
+
+export async function waitForModelCards(page: Page): Promise<void> {
+  await expect(page.locator('[data-testid="model-card"]').first()).toBeVisible({
+    timeout: 30000,
+  });
+}
+
+export async function selectModelFromLaunchDropdown(
+  page: Page,
+  modelPattern: RegExp | string,
+): Promise<void> {
+  // Click the model dropdown in the Launch Instance panel
+  const dropdown = page.locator('button:has-text("SELECT MODEL")');
+  await expect(dropdown).toBeVisible({ timeout: 30000 });
+  await dropdown.click();
+
+  // Wait for dropdown menu to appear and select the model
+  const modelOption = page.locator("button").filter({ hasText: modelPattern });
+  await expect(modelOption.first()).toBeVisible({ timeout: 10000 });
+  await modelOption.first().click();
+}
+
+export async function waitForChatReady(page: Page): Promise<void> {
+  await expect(page.locator('[data-testid="chat-input"]')).toBeVisible({
+    timeout: 10000,
+  });
+  await expect(page.locator('[data-testid="send-button"]')).toBeVisible({
+    timeout: 10000,
+  });
+}
+
+export async function waitForAssistantMessage(
+  page: Page,
+  timeoutMs = 60000,
+): Promise<void> {
+  await expect(
+    page.locator('[data-testid="assistant-message"]').last(),
+  ).toBeVisible({ timeout: timeoutMs });
+}
+
+export async function waitForStreamingComplete(
+  page: Page,
+  timeoutMs = 120000,
+): Promise<void> {
+  const startTime = Date.now();
+  while (Date.now() - startTime < timeoutMs) {
+    const sendButton = page.locator('[data-testid="send-button"]');
+    const buttonText = await sendButton.textContent();
+    if (
+      buttonText &&
+      !buttonText.includes("PROCESSING") &&
+      !buttonText.includes("...")
+    ) {
+      return;
+    }
+    await page.waitForTimeout(500);
+  }
+  throw new Error(`Streaming did not complete within ${timeoutMs}ms`);
+}
+
+export async function selectModel(
+  page: Page,
+  modelName: string,
+): Promise<void> {
+  const modelSelector = page.locator('[data-testid="chat-model-selector"]');
+  await modelSelector.click();
+  await page.locator(`text=${modelName}`).click();
+}
+
+export async function sendChatMessage(
+  page: Page,
+  message: string,
+): Promise<void> {
+  const chatInput = page.locator('[data-testid="chat-input"]');
+  await chatInput.fill(message);
+  const sendButton = page.locator('[data-testid="send-button"]');
+  await sendButton.click();
+}
+
+export async function launchModel(
+  page: Page,
+  modelCardIndex = 0,
+): Promise<void> {
+  const modelCards = page.locator('[data-testid="model-card"]');
+  const launchButton = modelCards
+    .nth(modelCardIndex)
+    .locator('[data-testid="launch-button"]');
+  await launchButton.click();
+}

dashboard/tests/visual/chat-interface.spec.ts

@@ -0,0 +1,26 @@
+import { test, expect } from "@playwright/test";
+import { waitForTopologyLoaded } from "../helpers/wait-for-ready";
+
+test.describe("Chat Interface", () => {
+  test("should display chat input and send button", async ({ page }) => {
+    await page.goto("/");
+    await waitForTopologyLoaded(page);
+
+    const chatInput = page.locator('[data-testid="chat-input"]');
+    await expect(chatInput).toBeVisible();
+
+    const sendButton = page.locator('[data-testid="send-button"]');
+    await expect(sendButton).toBeVisible();
+  });
+
+  test("should allow typing in chat input", async ({ page }) => {
+    await page.goto("/");
+    await waitForTopologyLoaded(page);
+
+    const chatInput = page.locator('[data-testid="chat-input"]');
+    await expect(chatInput).toBeVisible();
+
+    await chatInput.fill("Test message");
+    await expect(chatInput).toHaveValue("Test message");
+  });
+});

dashboard/tests/visual/homepage.spec.ts

@@ -0,0 +1,16 @@
+import { test, expect } from "@playwright/test";
+import { waitForTopologyLoaded } from "../helpers/wait-for-ready";
+
+test.describe("Homepage", () => {
+  test("should load and display key elements", async ({ page }) => {
+    await page.goto("/");
+    await waitForTopologyLoaded(page);
+
+    // Verify key UI elements are present
+    await expect(
+      page.locator('[data-testid="topology-graph"]').first(),
+    ).toBeVisible();
+    await expect(page.locator('[data-testid="chat-input"]')).toBeVisible();
+    await expect(page.locator('[data-testid="send-button"]')).toBeVisible();
+  });
+});

flake.lock

@@ -21,7 +21,9 @@
           "nixpkgs"
         ],
         "purescript-overlay": "purescript-overlay",
-        "pyproject-nix": "pyproject-nix"
+        "pyproject-nix": [
+          "pyproject-nix"
+        ]
       },
       "locked": {
         "lastModified": 1765953015,
@@ -149,19 +151,44 @@
         "type": "github"
       }
     },
+    "pyproject-build-systems": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "pyproject-nix": [
+          "pyproject-nix"
+        ],
+        "uv2nix": [
+          "uv2nix"
+        ]
+      },
+      "locked": {
+        "lastModified": 1763662255,
+        "narHash": "sha256-4bocaOyLa3AfiS8KrWjZQYu+IAta05u3gYZzZ6zXbT0=",
+        "owner": "pyproject-nix",
+        "repo": "build-system-pkgs",
+        "rev": "042904167604c681a090c07eb6967b4dd4dae88c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "pyproject-nix",
+        "repo": "build-system-pkgs",
+        "type": "github"
+      }
+    },
     "pyproject-nix": {
       "inputs": {
         "nixpkgs": [
-          "dream2nix",
           "nixpkgs"
         ]
       },
       "locked": {
-        "lastModified": 1763017646,
-        "narHash": "sha256-Z+R2lveIp6Skn1VPH3taQIuMhABg1IizJd8oVdmdHsQ=",
+        "lastModified": 1764134915,
+        "narHash": "sha256-xaKvtPx6YAnA3HQVp5LwyYG1MaN4LLehpQI8xEdBvBY=",
         "owner": "pyproject-nix",
         "repo": "pyproject.nix",
-        "rev": "47bd6f296502842643078d66128f7b5e5370790c",
+        "rev": "2c8df1383b32e5443c921f61224b198a2282a657",
         "type": "github"
       },
       "original": {
@@ -178,7 +205,10 @@
         "flake-parts": "flake-parts",
         "nixpkgs": "nixpkgs",
         "nixpkgs-swift": "nixpkgs-swift",
-        "treefmt-nix": "treefmt-nix"
+        "pyproject-build-systems": "pyproject-build-systems",
+        "pyproject-nix": "pyproject-nix",
+        "treefmt-nix": "treefmt-nix",
+        "uv2nix": "uv2nix"
       }
     },
     "rust-analyzer-src": {
@@ -239,6 +269,29 @@
         "repo": "treefmt-nix",
         "type": "github"
       }
+    },
+    "uv2nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "pyproject-nix": [
+          "pyproject-nix"
+        ]
+      },
+      "locked": {
+        "lastModified": 1767701098,
+        "narHash": "sha256-CJhKZnWb3gumR9oTRjFvCg/6lYTGbZRU7xtvcyWIRwU=",
+        "owner": "pyproject-nix",
+        "repo": "uv2nix",
+        "rev": "9d357f0d2ce6f5f35ec7959d7e704452352eb4da",
+        "type": "github"
+      },
+      "original": {
+        "owner": "pyproject-nix",
+        "repo": "uv2nix",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -24,6 +24,26 @@
     dream2nix = {
       url = "github:nix-community/dream2nix";
       inputs.nixpkgs.follows = "nixpkgs";
+      inputs.pyproject-nix.follows = "pyproject-nix";
+    };
+
+    # Python packaging with uv2nix
+    pyproject-nix = {
+      url = "github:pyproject-nix/pyproject.nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    uv2nix = {
+      url = "github:pyproject-nix/uv2nix";
+      inputs.pyproject-nix.follows = "pyproject-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    pyproject-build-systems = {
+      url = "github:pyproject-nix/build-system-pkgs";
+      inputs.pyproject-nix.follows = "pyproject-nix";
+      inputs.uv2nix.follows = "uv2nix";
+      inputs.nixpkgs.follows = "nixpkgs";
     };
 
     # Pinned nixpkgs for swift-format (swift is broken on x86_64-linux in newer nixpkgs)
@@ -48,6 +68,7 @@
         inputs.treefmt-nix.flakeModule
         ./dashboard/parts.nix
         ./rust/parts.nix
+        ./python/parts.nix
       ];
 
       perSystem =
@@ -58,6 +79,11 @@
           pkgsSwift = import inputs.nixpkgs-swift { inherit system; };
         in
         {
+          # Allow unfree for metal-toolchain (needed for Darwin Metal packages)
+          _module.args.pkgs = import inputs.nixpkgs {
+            inherit system;
+            config.allowUnfreePredicate = pkg: (pkg.pname or "") == "metal-toolchain";
+          };
           treefmt = {
             projectRootFile = "flake.nix";
             programs = {
@@ -79,14 +105,24 @@
                 enable = true;
                 package = pkgsSwift.swiftPackages.swift-format;
               };
+              shfmt.enable = true;
             };
           };
 
-          checks.lint = pkgs.runCommand "lint-check" { } ''
-            export RUFF_CACHE_DIR="$TMPDIR/ruff-cache"
-            ${pkgs.ruff}/bin/ruff check ${inputs.self}/
-            touch $out
-          '';
+          packages = lib.optionalAttrs pkgs.stdenv.hostPlatform.isDarwin (
+            let
+              uvLock = builtins.fromTOML (builtins.readFile ./uv.lock);
+              mlxPackage = builtins.head (builtins.filter (p: p.name == "mlx") uvLock.package);
+              uvLockMlxVersion = mlxPackage.version;
+            in
+            {
+              metal-toolchain = pkgs.callPackage ./nix/metal-toolchain.nix { };
+              mlx = pkgs.callPackage ./nix/mlx.nix {
+                metal-toolchain = self'.packages.metal-toolchain;
+                inherit uvLockMlxVersion;
+              };
+            }
+          );
 
           devShells.default = with pkgs; pkgs.mkShell {
             inputsFrom = [ self'.checks.cargo-build ];

justfile

@@ -1,7 +1,7 @@
 export NIX_CONFIG := "extra-experimental-features = nix-command flakes"
 
 fmt:
-    nix fmt
+    treefmt || nix fmt
 
 lint:
     uv run ruff check --fix

nix/darwin-build-fixes.patch

@@ -0,0 +1,79 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 0ed30932..d8528132 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -177,11 +177,7 @@ if(MLX_BUILD_METAL)
+     add_compile_definitions(MLX_METAL_DEBUG)
+   endif()
+
+-  # Throw an error if xcrun not found
+-  execute_process(
+-    COMMAND zsh "-c" "/usr/bin/xcrun -sdk macosx --show-sdk-version"
+-    OUTPUT_VARIABLE MACOS_SDK_VERSION
+-    OUTPUT_STRIP_TRAILING_WHITESPACE COMMAND_ERROR_IS_FATAL ANY)
++  set(MACOS_SDK_VERSION @sdkVersion@)
+
+   if(${MACOS_SDK_VERSION} LESS 14.0)
+     message(
+@@ -199,11 +195,8 @@ if(MLX_BUILD_METAL)
+     endif()
+     set(XCRUN_FLAGS "-mmacosx-version-min=${CMAKE_OSX_DEPLOYMENT_TARGET}")
+   endif()
+-  execute_process(
+-    COMMAND
+-      zsh "-c"
+-      "echo \"__METAL_VERSION__\" | xcrun -sdk macosx metal ${XCRUN_FLAGS} -E -x metal -P - | tail -1 | tr -d '\n'"
+-    OUTPUT_VARIABLE MLX_METAL_VERSION COMMAND_ERROR_IS_FATAL ANY)
++  set(
++    MLX_METAL_VERSION @metalVersion@)
+   FetchContent_Declare(metal_cpp URL ${METAL_CPP_URL})
+   FetchContent_MakeAvailable(metal_cpp)
+   target_include_directories(
+diff --git a/cmake/extension.cmake b/cmake/extension.cmake
+index 13db804a..5b385132 100644
+--- a/cmake/extension.cmake
++++ b/cmake/extension.cmake
+@@ -36,7 +36,7 @@ macro(mlx_build_metallib)
+   add_custom_command(
+     OUTPUT ${MTLLIB_BUILD_TARGET}
+     COMMAND
+-      xcrun -sdk macosx metal
++      metal -fmodules-cache-path=${CMAKE_BINARY_DIR}/metal-cache
+       "$<LIST:TRANSFORM,${MTLLIB_INCLUDE_DIRS},PREPEND,-I>"
+       ${MTLLIB_COMPILE_OPTIONS} ${MTLLIB_SOURCES} -o ${MTLLIB_BUILD_TARGET}
+     DEPENDS ${MTLLIB_DEPS} ${MTLLIB_SOURCES}
+diff --git a/mlx/backend/metal/kernels/CMakeLists.txt b/mlx/backend/metal/kernels/CMakeLists.txt
+index 262b0495..5c7446ad 100644
+--- a/mlx/backend/metal/kernels/CMakeLists.txt
++++ b/mlx/backend/metal/kernels/CMakeLists.txt
+@@ -29,7 +29,7 @@ function(build_kernel_base TARGET SRCFILE DEPS)
+                     "-mmacosx-version-min=${CMAKE_OSX_DEPLOYMENT_TARGET}")
+   endif()
+   add_custom_command(
+-    COMMAND xcrun -sdk macosx metal ${METAL_FLAGS} -c ${SRCFILE}
++    COMMAND metal -fmodules-cache-path=${CMAKE_BINARY_DIR}/metal-cache ${METAL_FLAGS} -c ${SRCFILE}
+             -I${PROJECT_SOURCE_DIR} -o ${TARGET}.air
+     DEPENDS ${SRCFILE} ${DEPS} ${BASE_HEADERS}
+     OUTPUT ${TARGET}.air
+@@ -170,7 +170,7 @@ endif()
+
+ add_custom_command(
+   OUTPUT ${MLX_METAL_PATH}/mlx.metallib
+-  COMMAND xcrun -sdk macosx metallib ${KERNEL_AIR} -o
++  COMMAND metallib ${KERNEL_AIR} -o
+           ${MLX_METAL_PATH}/mlx.metallib
+   DEPENDS ${KERNEL_AIR}
+   COMMENT "Building mlx.metallib"
+diff --git a/mlx/backend/metal/make_compiled_preamble.sh b/mlx/backend/metal/make_compiled_preamble.sh
+index bb55ed3a..94ea7dd7 100644
+--- a/mlx/backend/metal/make_compiled_preamble.sh
++++ b/mlx/backend/metal/make_compiled_preamble.sh
+@@ -31,7 +31,7 @@ OUTPUT_FILE=${OUTPUT_DIR}/${SRC_NAME}.cpp
+ mkdir -p "$OUTPUT_DIR"
+
+ # Use the metal compiler to get a list of headers (with depth)
+-CCC="xcrun -sdk macosx metal -x metal"
++CCC="metal -x metal -fmodules-cache-path=${OUTPUT_DIR}/metal-cache"
+ HDRS=$( $CCC -I"$SRC_DIR" -I"$JIT_INCLUDES" -DMLX_METAL_JIT -E -P -CC -C -H "$INPUT_FILE" $CFLAGS -w 2>&1 1>/dev/null )
+
+ # Remove any included system frameworks (for MetalPerformancePrimitive headers)

nix/metal-toolchain.nix

@@ -0,0 +1,56 @@
+{ lib, stdenvNoCC, requireFile, nix }:
+
+let
+  narFile = requireFile {
+    name = "metal-toolchain-17C48.nar";
+    message = ''
+      The Metal Toolchain NAR must be available.
+
+      If you have cachix configured for exo.cachix.org, this should be automatic.
+
+      Otherwise:
+        1. Install Xcode 26+ from the App Store
+        2. Run: xcodebuild -downloadComponent MetalToolchain
+        3. Export the toolchain:
+           hdiutil attach "$(find /System/Library/AssetsV2/com_apple_MobileAsset_MetalToolchain -name '*.dmg' | head -1)" -mountpoint /tmp/metal-dmg
+           cp -R /tmp/metal-dmg/Metal.xctoolchain /tmp/metal-export
+           hdiutil detach /tmp/metal-dmg
+        4. Create NAR and add to store:
+           nix nar pack /tmp/metal-export > /tmp/metal-toolchain-17C48.nar
+           nix store add --mode flat /tmp/metal-toolchain-17C48.nar
+    '';
+    hash = "sha256-ayR5mXN4sZAddwKEG2OszGRF93k9ZFc7H0yi2xbylQw=";
+  };
+in
+stdenvNoCC.mkDerivation {
+  pname = "metal-toolchain";
+  version = "17C48";
+
+  dontUnpack = true;
+  dontBuild = true;
+  dontFixup = true;
+
+  nativeBuildInputs = [ nix ];
+
+  installPhase = ''
+    runHook preInstall
+
+    nix-store --restore $out < ${narFile}
+
+    # Create bin directory with symlinks for PATH
+    mkdir -p $out/bin
+    ln -s $out/usr/bin/metal $out/bin/metal
+    ln -s $out/usr/bin/metallib $out/bin/metallib
+
+    runHook postInstall
+  '';
+
+  # Metal language version for CMake (from: echo __METAL_VERSION__ | metal -E -x metal -P -)
+  passthru.metalVersion = "400";
+
+  meta = {
+    description = "Apple Metal compiler toolchain";
+    platforms = [ "aarch64-darwin" ];
+    license = lib.licenses.unfree;
+  };
+}

nix/mlx.nix

@@ -0,0 +1,158 @@
+{ stdenv
+, lib
+, fetchFromGitHub
+, replaceVars
+, fetchzip
+, cmake
+, nlohmann_json
+, apple-sdk_26
+, metal-toolchain
+, runCommand
+, fmt
+, python313Packages
+, uvLockMlxVersion
+}:
+
+assert stdenv.isDarwin;
+
+let
+  python = python313Packages.python;
+
+  # Static dependencies included directly during compilation
+  gguf-tools = fetchFromGitHub {
+    owner = "antirez";
+    repo = "gguf-tools";
+    rev = "8fa6eb65236618e28fd7710a0fba565f7faa1848";
+    hash = "sha256-15FvyPOFqTOr5vdWQoPnZz+mYH919++EtghjozDlnSA=";
+  };
+
+  metal_cpp = fetchzip {
+    url = "https://developer.apple.com/metal/cpp/files/metal-cpp_26.zip";
+    hash = "sha256-7n2eI2lw/S+Us6l7YPAATKwcIbRRpaQ8VmES7S8ZjY8=";
+  };
+
+  nanobind = fetchFromGitHub {
+    owner = "wjakob";
+    repo = "nanobind";
+    rev = "v2.10.2";
+    hash = "sha256-io44YhN+VpfHFWyvvLWSanRgbzA0whK8WlDNRi3hahU=";
+    fetchSubmodules = true;
+  };
+
+  mlx = stdenv.mkDerivation rec {
+    pname = "mlx";
+    version = let v = "0.30.4"; in
+      assert v == uvLockMlxVersion || throw "MLX version mismatch: nix/mlx.nix has ${v} but uv.lock has ${uvLockMlxVersion}. Update both the version and hash in nix/mlx.nix.";
+      v;
+    pyproject = true;
+
+    src = fetchFromGitHub {
+      owner = "ml-explore";
+      repo = "mlx";
+      tag = "v${version}";
+      hash = "sha256-OJk6jPlbaSlsUdk3ADz3tWcRzTWXRof3/q8Soe1AO6w=";
+    };
+
+    patches = [
+      (replaceVars ./darwin-build-fixes.patch {
+        sdkVersion = apple-sdk_26.version;
+        metalVersion = metal-toolchain.metalVersion;
+      })
+    ];
+
+    postPatch = ''
+      substituteInPlace mlx/backend/cpu/jit_compiler.cpp \
+        --replace-fail "g++" "$CXX"
+    '';
+
+    dontUseCmakeConfigure = true;
+
+    enableParallelBuilding = true;
+
+    # Allows multiple cores to be used in Python builds.
+    postUnpack = ''
+      export MAKEFLAGS+="''${enableParallelBuilding:+-j$NIX_BUILD_CORES}"
+    '';
+
+    # Updates the wrong fetcher rev attribute
+    passthru.skipBulkUpdate = true;
+
+    env = {
+      DEV_RELEASE = 1;
+      CMAKE_ARGS = toString [
+        (lib.cmakeBool "USE_SYSTEM_FMT" true)
+        (lib.cmakeOptionType "filepath" "FETCHCONTENT_SOURCE_DIR_GGUFLIB" "${gguf-tools}")
+        (lib.cmakeOptionType "filepath" "FETCHCONTENT_SOURCE_DIR_JSON" "${nlohmann_json.src}")
+        (lib.cmakeOptionType "filepath" "FETCHCONTENT_SOURCE_DIR_NANOBIND" "${nanobind}")
+        (lib.cmakeBool "FETCHCONTENT_FULLY_DISCONNECTED" true)
+        (lib.cmakeBool "MLX_BUILD_METAL" true)
+        (lib.cmakeOptionType "filepath" "FETCHCONTENT_SOURCE_DIR_METAL_CPP" "${metal_cpp}")
+        (lib.cmakeOptionType "string" "CMAKE_OSX_DEPLOYMENT_TARGET" "${apple-sdk_26.version}")
+        (lib.cmakeOptionType "filepath" "CMAKE_OSX_SYSROOT" "${apple-sdk_26.passthru.sdkroot}")
+      ];
+      SDKROOT = apple-sdk_26.passthru.sdkroot;
+      MACOSX_DEPLOYMENT_TARGET = apple-sdk_26.version;
+    };
+
+    build-system = [
+      python313Packages.setuptools
+    ];
+
+    nativeBuildInputs = [
+      cmake
+      metal-toolchain
+      python313Packages.pypaBuildHook
+      python313Packages.pypaInstallHook
+      python313Packages.setuptools
+      python313Packages.typing-extensions
+      python313Packages.wheel
+      python313Packages.cmake
+      python313Packages.ninja
+    ];
+
+    buildInputs = [
+      fmt
+      gguf-tools
+      python313Packages.nanobind
+      python313Packages.pybind11
+      apple-sdk_26
+    ];
+
+    # Tests require Metal GPU access which isn't available in the Nix sandbox.
+    # To run tests, build with: nix build --option sandbox false .#mlx.passthru.tests.mlxTest
+    doCheck = false;
+
+    pythonImportsCheck = [ "mlx" ];
+
+    passthru.tests = {
+      # Runs example scripts to verify MLX works. Requires --option sandbox false
+      # since Metal GPU access is needed.
+      mlxTest =
+        runCommand "run-mlx-examples"
+          {
+            buildInputs = [ mlx ];
+            nativeBuildInputs = [ python ];
+          }
+          ''
+            cp ${src}/examples/python/logistic_regression.py .
+            ${python.interpreter} logistic_regression.py
+            rm logistic_regression.py
+
+            cp ${src}/examples/python/linear_regression.py .
+            ${python.interpreter} linear_regression.py
+            rm linear_regression.py
+
+            touch $out
+          '';
+    };
+
+    meta = {
+      homepage = "https://github.com/ml-explore/mlx";
+      description = "Array framework for Apple silicon";
+      changelog = "https://github.com/ml-explore/mlx/releases/tag/${src.tag}";
+      license = lib.licenses.mit;
+      platforms = [ "aarch64-darwin" ];
+    };
+  };
+in
+mlx

packaging/pyinstaller/exo.spec

@@ -10,6 +10,7 @@ PROJECT_ROOT = Path.cwd()
 SOURCE_ROOT = PROJECT_ROOT / "src"
 ENTRYPOINT = SOURCE_ROOT / "exo" / "__main__.py"
 DASHBOARD_DIR = PROJECT_ROOT / "dashboard" / "build"
+RESOURCES_DIR = PROJECT_ROOT / "resources"
 EXO_SHARED_MODELS_DIR = SOURCE_ROOT / "exo" / "shared" / "models"
 
 if not ENTRYPOINT.is_file():
@@ -18,6 +19,9 @@ if not ENTRYPOINT.is_file():
 if not DASHBOARD_DIR.is_dir():
     raise SystemExit(f"Dashboard assets are missing: {DASHBOARD_DIR}")
 
+if not RESOURCES_DIR.is_dir():
+    raise SystemExit(f"Resource assets are missing: {RESOURCES_DIR}")
+
 if not EXO_SHARED_MODELS_DIR.is_dir():
     raise SystemExit(f"Shared model assets are missing: {EXO_SHARED_MODELS_DIR}")
 
@@ -58,6 +62,7 @@ HIDDEN_IMPORTS = sorted(
 
 DATAS: list[tuple[str, str]] = [
     (str(DASHBOARD_DIR), "dashboard"),
+    (str(RESOURCES_DIR), "resources"),
     (str(MLX_LIB_DIR), "mlx/lib"),
     (str(EXO_SHARED_MODELS_DIR), "exo/shared/models"),
 ]

pyproject.toml

@@ -17,16 +17,16 @@ dependencies = [
     "loguru>=0.7.3",
     "exo_pyo3_bindings", # rust bindings
     "anyio==4.11.0",
-    "mlx==0.30.3; sys_platform == 'darwin'",
-    "mlx[cpu]==0.30.3; sys_platform == 'linux'",
-    "mlx-lm @ git+https://github.com/AlexCheema/mlx-lm.git@fix-transformers-5.0.0rc2",
+    "mlx==0.30.4; sys_platform == 'darwin'",
+    "mlx[cpu]==0.30.4; sys_platform == 'linux'",
+    "mlx-lm",
     "tiktoken>=0.12.0", # required for kimi k2 tokenizer
     "hypercorn>=0.18.0",
     "openai-harmony>=0.0.8",
     "httpx>=0.28.1",
     "tomlkit>=0.14.0",
     "pillow>=11.0,<12.0", # compatibility with mflux
-    "mflux>=0.14.2",
+    "mflux==0.15.4",
     "python-multipart>=0.0.21",
 ]
 
@@ -63,6 +63,7 @@ members = [
 
 [tool.uv.sources]
 exo_pyo3_bindings = { workspace = true }
+mlx-lm = { git = "https://github.com/ml-explore/mlx-lm", branch = "main" }
 # Uncomment to use local mlx/mlx-lm development versions:
 # mlx = { path = "/Users/Shared/mlx", editable=true }
 # mlx-lm = { path = "/Users/Shared/mlx-lm", editable=true }

python/parts.nix

@@ -0,0 +1,94 @@
+{ inputs, ... }:
+{
+  perSystem =
+    { config, self', pkgs, lib, system, ... }:
+    let
+      # Load workspace from uv.lock
+      workspace = inputs.uv2nix.lib.workspace.loadWorkspace {
+        workspaceRoot = inputs.self;
+      };
+
+      # Create overlay from workspace
+      # Use wheels from PyPI for most packages; we override mlx with our pure Nix Metal build
+      overlay = workspace.mkPyprojectOverlay { sourcePreference = "wheel"; };
+
+      # Override overlay to inject Nix-built components
+      exoOverlay = final: prev: {
+        # Replace workspace exo_pyo3_bindings with Nix-built wheel
+        exo-pyo3-bindings = pkgs.stdenv.mkDerivation {
+          pname = "exo-pyo3-bindings";
+          version = "0.1.0";
+          src = self'.packages.exo_pyo3_bindings;
+          # Install from pre-built wheel
+          nativeBuildInputs = [ final.pyprojectWheelHook ];
+          dontStrip = true;
+        };
+      };
+
+      python = pkgs.python313;
+
+      # Overlay to provide build systems and custom packages
+      buildSystemsOverlay = final: prev: {
+        # Use our pure Nix-built MLX with Metal support
+        mlx = self'.packages.mlx;
+
+        # mlx-lm is a git dependency that needs setuptools
+        mlx-lm = prev.mlx-lm.overrideAttrs (old: {
+          nativeBuildInputs = (old.nativeBuildInputs or [ ]) ++ [
+            final.setuptools
+          ];
+        });
+      };
+
+      pythonSet = (pkgs.callPackage inputs.pyproject-nix.build.packages {
+        inherit python;
+      }).overrideScope (
+        lib.composeManyExtensions [
+          inputs.pyproject-build-systems.overlays.default
+          overlay
+          exoOverlay
+          buildSystemsOverlay
+        ]
+      );
+      exoVenv = pythonSet.mkVirtualEnv "exo-env" workspace.deps.default;
+
+      # Virtual environment with dev dependencies for testing
+      testVenv = pythonSet.mkVirtualEnv "exo-test-env" (
+        workspace.deps.default // {
+          exo = [ "dev" ]; # Include pytest, pytest-asyncio, pytest-env
+        }
+      );
+
+      exoPackage = pkgs.runCommand "exo"
+        {
+          nativeBuildInputs = [ pkgs.makeWrapper ];
+        }
+        ''
+          mkdir -p $out/bin
+
+          # Create wrapper scripts
+          for script in exo exo-master exo-worker; do
+            makeWrapper ${exoVenv}/bin/$script $out/bin/$script \
+              --set DASHBOARD_DIR ${self'.packages.dashboard} \
+              ${lib.optionalString pkgs.stdenv.isDarwin "--prefix PATH : ${pkgs.macmon}/bin"}
+          done
+        '';
+    in
+    {
+      # Python package only available on macOS (requires MLX/Metal)
+      packages = lib.optionalAttrs pkgs.stdenv.hostPlatform.isDarwin {
+        exo = exoPackage;
+        # Test environment for running pytest outside of Nix sandbox (needs GPU access)
+        exo-test-env = testVenv;
+      };
+
+      checks = {
+        # Ruff linting (works on all platforms)
+        lint = pkgs.runCommand "ruff-lint" { } ''
+          export RUFF_CACHE_DIR="$TMPDIR/ruff-cache"
+          ${pkgs.ruff}/bin/ruff check ${inputs.self}/
+          touch $out
+        '';
+      };
+    };
+}

resources/image_model_cards/exolabs--FLUX.1-Krea-dev-4bit.toml

@@ -0,0 +1,45 @@
+model_id = "exolabs/FLUX.1-Krea-dev-4bit"
+n_layers = 57
+hidden_size = 1
+supports_tensor = false
+tasks = ["TextToImage"]
+
+[storage_size]
+in_bytes = 15475325472
+
+[[components]]
+component_name = "text_encoder"
+component_path = "text_encoder/"
+n_layers = 12
+can_shard = false
+
+[components.storage_size]
+in_bytes = 0
+
+[[components]]
+component_name = "text_encoder_2"
+component_path = "text_encoder_2/"
+n_layers = 24
+can_shard = false
+safetensors_index_filename = "model.safetensors.index.json"
+
+[components.storage_size]
+in_bytes = 9524621312
+
+[[components]]
+component_name = "transformer"
+component_path = "transformer/"
+n_layers = 57
+can_shard = true
+safetensors_index_filename = "diffusion_pytorch_model.safetensors.index.json"
+
+[components.storage_size]
+in_bytes = 5950704160
+
+[[components]]
+component_name = "vae"
+component_path = "vae/"
+can_shard = false
+
+[components.storage_size]
+in_bytes = 0

resources/image_model_cards/exolabs--FLUX.1-Krea-dev-8bit.toml

@@ -0,0 +1,45 @@
+model_id = "exolabs/FLUX.1-Krea-dev-8bit"
+n_layers = 57
+hidden_size = 1
+supports_tensor = false
+tasks = ["TextToImage"]
+
+[storage_size]
+in_bytes = 21426029632
+
+[[components]]
+component_name = "text_encoder"
+component_path = "text_encoder/"
+n_layers = 12
+can_shard = false
+
+[components.storage_size]
+in_bytes = 0
+
+[[components]]
+component_name = "text_encoder_2"
+component_path = "text_encoder_2/"
+n_layers = 24
+can_shard = false
+safetensors_index_filename = "model.safetensors.index.json"
+
+[components.storage_size]
+in_bytes = 9524621312
+
+[[components]]
+component_name = "transformer"
+component_path = "transformer/"
+n_layers = 57
+can_shard = true
+safetensors_index_filename = "diffusion_pytorch_model.safetensors.index.json"
+
+[components.storage_size]
+in_bytes = 11901408320
+
+[[components]]
+component_name = "vae"
+component_path = "vae/"
+can_shard = false
+
+[components.storage_size]
+in_bytes = 0

resources/image_model_cards/exolabs--FLUX.1-Krea-dev.toml

@@ -0,0 +1,45 @@
+model_id = "exolabs/FLUX.1-Krea-dev"
+n_layers = 57
+hidden_size = 1
+supports_tensor = false
+tasks = ["TextToImage"]
+
+[storage_size]
+in_bytes = 33327437952
+
+[[components]]
+component_name = "text_encoder"
+component_path = "text_encoder/"
+n_layers = 12
+can_shard = false
+
+[components.storage_size]
+in_bytes = 0
+
+[[components]]
+component_name = "text_encoder_2"
+component_path = "text_encoder_2/"
+n_layers = 24
+can_shard = false
+safetensors_index_filename = "model.safetensors.index.json"
+
+[components.storage_size]
+in_bytes = 9524621312
+
+[[components]]
+component_name = "transformer"
+component_path = "transformer/"
+n_layers = 57
+can_shard = true
+safetensors_index_filename = "diffusion_pytorch_model.safetensors.index.json"
+
+[components.storage_size]
+in_bytes = 23802816640
+
+[[components]]
+component_name = "vae"
+component_path = "vae/"
+can_shard = false
+
+[components.storage_size]
+in_bytes = 0

resources/image_model_cards/exolabs--FLUX.1-dev-4bit.toml

@@ -0,0 +1,45 @@
+model_id = "exolabs/FLUX.1-dev-4bit"
+n_layers = 57
+hidden_size = 1
+supports_tensor = false
+tasks = ["TextToImage"]
+
+[storage_size]
+in_bytes = 15475325472
+
+[[components]]
+component_name = "text_encoder"
+component_path = "text_encoder/"
+n_layers = 12
+can_shard = false
+
+[components.storage_size]
+in_bytes = 0
+
+[[components]]
+component_name = "text_encoder_2"
+component_path = "text_encoder_2/"
+n_layers = 24
+can_shard = false
+safetensors_index_filename = "model.safetensors.index.json"
+
+[components.storage_size]
+in_bytes = 9524621312
+
+[[components]]
+component_name = "transformer"
+component_path = "transformer/"
+n_layers = 57
+can_shard = true
+safetensors_index_filename = "diffusion_pytorch_model.safetensors.index.json"
+
+[components.storage_size]
+in_bytes = 5950704160
+
+[[components]]
+component_name = "vae"
+component_path = "vae/"
+can_shard = false
+
+[components.storage_size]
+in_bytes = 0

resources/image_model_cards/exolabs--FLUX.1-dev-8bit.toml

@@ -0,0 +1,45 @@
+model_id = "exolabs/FLUX.1-dev-8bit"
+n_layers = 57
+hidden_size = 1
+supports_tensor = false
+tasks = ["TextToImage"]
+
+[storage_size]
+in_bytes = 21426029632
+
+[[components]]
+component_name = "text_encoder"
+component_path = "text_encoder/"
+n_layers = 12
+can_shard = false
+
+[components.storage_size]
+in_bytes = 0
+
+[[components]]
+component_name = "text_encoder_2"
+component_path = "text_encoder_2/"
+n_layers = 24
+can_shard = false
+safetensors_index_filename = "model.safetensors.index.json"
+
+[components.storage_size]
+in_bytes = 9524621312
+
+[[components]]
+component_name = "transformer"
+component_path = "transformer/"
+n_layers = 57
+can_shard = true
+safetensors_index_filename = "diffusion_pytorch_model.safetensors.index.json"
+
+[components.storage_size]
+in_bytes = 11901408320
+
+[[components]]
+component_name = "vae"
+component_path = "vae/"
+can_shard = false
+
+[components.storage_size]
+in_bytes = 0

resources/image_model_cards/exolabs--FLUX.1-dev.toml

@@ -0,0 +1,45 @@
+model_id = "exolabs/FLUX.1-dev"
+n_layers = 57
+hidden_size = 1
+supports_tensor = false
+tasks = ["TextToImage"]
+
+[storage_size]
+in_bytes = 33327437952
+
+[[components]]
+component_name = "text_encoder"
+component_path = "text_encoder/"
+n_layers = 12
+can_shard = false
+
+[components.storage_size]
+in_bytes = 0
+
+[[components]]
+component_name = "text_encoder_2"
+component_path = "text_encoder_2/"
+n_layers = 24
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resources/image_model_cards/exolabs--FLUX.1-schnell-4bit.toml

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resources/image_model_cards/exolabs--FLUX.1-schnell-8bit.toml

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resources/image_model_cards/exolabs--FLUX.1-schnell.toml

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resources/image_model_cards/exolabs--Qwen-Image-4bit.toml

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resources/image_model_cards/exolabs--Qwen-Image-8bit.toml

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resources/image_model_cards/exolabs--Qwen-Image-Edit-2509-4bit.toml

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resources/image_model_cards/exolabs--Qwen-Image-Edit-2509-8bit.toml

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resources/image_model_cards/exolabs--Qwen-Image-Edit-2509.toml

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resources/image_model_cards/exolabs--Qwen-Image.toml

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resources/inference_model_cards/mlx-community--DeepSeek-V3.1-4bit.toml

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resources/inference_model_cards/mlx-community--DeepSeek-V3.1-8bit.toml

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resources/inference_model_cards/mlx-community--GLM-4.5-Air-8bit.toml

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resources/inference_model_cards/mlx-community--GLM-4.5-Air-bf16.toml

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resources/inference_model_cards/mlx-community--GLM-4.7-4bit.toml

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resources/inference_model_cards/mlx-community--GLM-4.7-6bit.toml

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resources/inference_model_cards/mlx-community--GLM-4.7-8bit-gs32.toml

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resources/inference_model_cards/mlx-community--GLM-4.7-Flash-4bit.toml

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resources/inference_model_cards/mlx-community--GLM-4.7-Flash-5bit.toml

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resources/inference_model_cards/mlx-community--GLM-4.7-Flash-6bit.toml

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resources/inference_model_cards/mlx-community--GLM-4.7-Flash-8bit.toml

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resources/inference_model_cards/mlx-community--Kimi-K2-Instruct-4bit.toml

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resources/inference_model_cards/mlx-community--Kimi-K2-Thinking.toml

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resources/inference_model_cards/mlx-community--Kimi-K2.5.toml

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resources/inference_model_cards/mlx-community--Llama-3.2-1B-Instruct-4bit.toml

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resources/inference_model_cards/mlx-community--Llama-3.2-3B-Instruct-4bit.toml

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resources/inference_model_cards/mlx-community--Llama-3.2-3B-Instruct-8bit.toml

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resources/inference_model_cards/mlx-community--Llama-3.3-70B-Instruct-4bit.toml

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resources/inference_model_cards/mlx-community--Llama-3.3-70B-Instruct-8bit.toml

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resources/inference_model_cards/mlx-community--Meta-Llama-3.1-70B-Instruct-4bit.toml

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resources/inference_model_cards/mlx-community--Meta-Llama-3.1-8B-Instruct-4bit.toml

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resources/inference_model_cards/mlx-community--Meta-Llama-3.1-8B-Instruct-8bit.toml

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resources/inference_model_cards/mlx-community--Meta-Llama-3.1-8B-Instruct-bf16.toml

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resources/inference_model_cards/mlx-community--MiniMax-M2.1-3bit.toml

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resources/inference_model_cards/mlx-community--MiniMax-M2.1-8bit.toml

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resources/inference_model_cards/mlx-community--Qwen3-0.6B-4bit.toml

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resources/inference_model_cards/mlx-community--Qwen3-0.6B-8bit.toml

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resources/inference_model_cards/mlx-community--Qwen3-235B-A22B-Instruct-2507-4bit.toml

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resources/inference_model_cards/mlx-community--Qwen3-235B-A22B-Instruct-2507-8bit.toml

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resources/inference_model_cards/mlx-community--Qwen3-30B-A3B-4bit.toml

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resources/inference_model_cards/mlx-community--Qwen3-30B-A3B-8bit.toml

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resources/inference_model_cards/mlx-community--Qwen3-Coder-480B-A35B-Instruct-4bit.toml

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resources/inference_model_cards/mlx-community--Qwen3-Coder-480B-A35B-Instruct-8bit.toml

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resources/inference_model_cards/mlx-community--Qwen3-Next-80B-A3B-Instruct-4bit.toml

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resources/inference_model_cards/mlx-community--Qwen3-Next-80B-A3B-Instruct-8bit.toml

@@ -0,0 +1,8 @@
+model_id = "mlx-community/Qwen3-Next-80B-A3B-Instruct-8bit"
+n_layers = 48
+hidden_size = 2048
+supports_tensor = true
+tasks = ["TextGeneration"]
+
+[storage_size]
+in_bytes = 88814387200

resources/inference_model_cards/mlx-community--Qwen3-Next-80B-A3B-Thinking-4bit.toml

@@ -0,0 +1,8 @@
+model_id = "mlx-community/Qwen3-Next-80B-A3B-Thinking-4bit"
+n_layers = 48
+hidden_size = 2048
+supports_tensor = true
+tasks = ["TextGeneration"]
+
+[storage_size]
+in_bytes = 47080074240

resources/inference_model_cards/mlx-community--Qwen3-Next-80B-A3B-Thinking-8bit.toml

@@ -0,0 +1,8 @@
+model_id = "mlx-community/Qwen3-Next-80B-A3B-Thinking-8bit"
+n_layers = 48
+hidden_size = 2048
+supports_tensor = true
+tasks = ["TextGeneration"]
+
+[storage_size]
+in_bytes = 88814387200

resources/inference_model_cards/mlx-community--gpt-oss-120b-MXFP4-Q8.toml

@@ -0,0 +1,8 @@
+model_id = "mlx-community/gpt-oss-120b-MXFP4-Q8"
+n_layers = 36
+hidden_size = 2880
+supports_tensor = true
+tasks = ["TextGeneration"]
+
+[storage_size]
+in_bytes = 70652212224

resources/inference_model_cards/mlx-community--gpt-oss-20b-MXFP4-Q8.toml

@@ -0,0 +1,8 @@
+model_id = "mlx-community/gpt-oss-20b-MXFP4-Q8"
+n_layers = 24
+hidden_size = 2880
+supports_tensor = true
+tasks = ["TextGeneration"]
+
+[storage_size]
+in_bytes = 12025908224

resources/inference_model_cards/mlx-community--llama-3.3-70b-instruct-fp16.toml

@@ -0,0 +1,8 @@
+model_id = "mlx-community/llama-3.3-70b-instruct-fp16"
+n_layers = 80
+hidden_size = 8192
+supports_tensor = true
+tasks = ["TextGeneration"]
+
+[storage_size]
+in_bytes = 144383672320

src/exo/download/coordinator.py

@@ -0,0 +1,284 @@
+import asyncio
+from dataclasses import dataclass, field
+from typing import Iterator
+
+import anyio
+from anyio import current_time
+from anyio.abc import TaskGroup
+from loguru import logger
+
+from exo.download.download_utils import (
+    RepoDownloadProgress,
+    delete_model,
+    map_repo_download_progress_to_download_progress_data,
+)
+from exo.download.shard_downloader import ShardDownloader
+from exo.shared.models.model_cards import ModelId
+from exo.shared.types.commands import (
+    DeleteDownload,
+    ForwarderDownloadCommand,
+    StartDownload,
+)
+from exo.shared.types.common import NodeId, SessionId
+from exo.shared.types.events import (
+    Event,
+    ForwarderEvent,
+    NodeDownloadProgress,
+)
+from exo.shared.types.worker.downloads import (
+    DownloadCompleted,
+    DownloadFailed,
+    DownloadOngoing,
+    DownloadPending,
+    DownloadProgress,
+)
+from exo.shared.types.worker.shards import ShardMetadata
+from exo.utils.channels import Receiver, Sender, channel
+
+
+@dataclass
+class DownloadCoordinator:
+    node_id: NodeId
+    session_id: SessionId
+    shard_downloader: ShardDownloader
+    download_command_receiver: Receiver[ForwarderDownloadCommand]
+    local_event_sender: Sender[ForwarderEvent]
+    event_index_counter: Iterator[int]
+
+    # Local state
+    download_status: dict[ModelId, DownloadProgress] = field(default_factory=dict)
+    active_downloads: dict[ModelId, asyncio.Task[None]] = field(default_factory=dict)
+
+    # Internal event channel for forwarding (initialized in __post_init__)
+    event_sender: Sender[Event] = field(init=False)
+    event_receiver: Receiver[Event] = field(init=False)
+    _tg: TaskGroup = field(init=False)
+
+    def __post_init__(self) -> None:
+        self.event_sender, self.event_receiver = channel[Event]()
+        self._tg = anyio.create_task_group()
+
+    async def run(self) -> None:
+        logger.info("Starting DownloadCoordinator")
+        async with self._tg as tg:
+            tg.start_soon(self._command_processor)
+            tg.start_soon(self._forward_events)
+            tg.start_soon(self._emit_existing_download_progress)
+
+    def shutdown(self) -> None:
+        self._tg.cancel_scope.cancel()
+
+    async def _command_processor(self) -> None:
+        with self.download_command_receiver as commands:
+            async for cmd in commands:
+                # Only process commands targeting this node
+                if cmd.command.target_node_id != self.node_id:
+                    continue
+
+                match cmd.command:
+                    case StartDownload(shard_metadata=shard):
+                        await self._start_download(shard)
+                    case DeleteDownload(model_id=model_id):
+                        await self._delete_download(model_id)
+
+    async def _start_download(self, shard: ShardMetadata) -> None:
+        model_id = shard.model_card.model_id
+
+        # Check if already downloading or complete
+        if model_id in self.download_status:
+            status = self.download_status[model_id]
+            if isinstance(status, (DownloadOngoing, DownloadCompleted)):
+                logger.debug(
+                    f"Download for {model_id} already in progress or complete, skipping"
+                )
+                return
+
+        # Emit pending status
+        progress = DownloadPending(shard_metadata=shard, node_id=self.node_id)
+        self.download_status[model_id] = progress
+        await self.event_sender.send(NodeDownloadProgress(download_progress=progress))
+
+        # Check initial status from downloader
+        initial_progress = (
+            await self.shard_downloader.get_shard_download_status_for_shard(shard)
+        )
+
+        if initial_progress.status == "complete":
+            completed = DownloadCompleted(
+                shard_metadata=shard,
+                node_id=self.node_id,
+                total_bytes=initial_progress.total_bytes,
+            )
+            self.download_status[model_id] = completed
+            await self.event_sender.send(
+                NodeDownloadProgress(download_progress=completed)
+            )
+            return
+
+        # Start actual download
+        self._start_download_task(shard, initial_progress)
+
+    def _start_download_task(
+        self, shard: ShardMetadata, initial_progress: RepoDownloadProgress
+    ) -> None:
+        model_id = shard.model_card.model_id
+
+        # Emit ongoing status
+        status = DownloadOngoing(
+            node_id=self.node_id,
+            shard_metadata=shard,
+            download_progress=map_repo_download_progress_to_download_progress_data(
+                initial_progress
+            ),
+        )
+        self.download_status[model_id] = status
+        self.event_sender.send_nowait(NodeDownloadProgress(download_progress=status))
+
+        last_progress_time = 0.0
+        throttle_interval_secs = 1.0
+
+        async def download_progress_callback(
+            callback_shard: ShardMetadata, progress: RepoDownloadProgress
+        ) -> None:
+            nonlocal last_progress_time
+
+            if progress.status == "complete":
+                completed = DownloadCompleted(
+                    shard_metadata=callback_shard,
+                    node_id=self.node_id,
+                    total_bytes=progress.total_bytes,
+                )
+                self.download_status[callback_shard.model_card.model_id] = completed
+                await self.event_sender.send(
+                    NodeDownloadProgress(download_progress=completed)
+                )
+                # Clean up active download tracking
+                if callback_shard.model_card.model_id in self.active_downloads:
+                    del self.active_downloads[callback_shard.model_card.model_id]
+            elif (
+                progress.status == "in_progress"
+                and current_time() - last_progress_time > throttle_interval_secs
+            ):
+                ongoing = DownloadOngoing(
+                    node_id=self.node_id,
+                    shard_metadata=callback_shard,
+                    download_progress=map_repo_download_progress_to_download_progress_data(
+                        progress
+                    ),
+                )
+                self.download_status[callback_shard.model_card.model_id] = ongoing
+                await self.event_sender.send(
+                    NodeDownloadProgress(download_progress=ongoing)
+                )
+                last_progress_time = current_time()
+
+        self.shard_downloader.on_progress(download_progress_callback)
+
+        async def download_wrapper() -> None:
+            try:
+                await self.shard_downloader.ensure_shard(shard)
+            except Exception as e:
+                logger.error(f"Download failed for {model_id}: {e}")
+                failed = DownloadFailed(
+                    shard_metadata=shard,
+                    node_id=self.node_id,
+                    error_message=str(e),
+                )
+                self.download_status[model_id] = failed
+                await self.event_sender.send(
+                    NodeDownloadProgress(download_progress=failed)
+                )
+            finally:
+                if model_id in self.active_downloads:
+                    del self.active_downloads[model_id]
+
+        task = asyncio.create_task(download_wrapper())
+        self.active_downloads[model_id] = task
+
+    async def _delete_download(self, model_id: ModelId) -> None:
+        # Cancel if active
+        if model_id in self.active_downloads:
+            logger.info(f"Cancelling active download for {model_id} before deletion")
+            self.active_downloads[model_id].cancel()
+            del self.active_downloads[model_id]
+
+        # Delete from disk
+        logger.info(f"Deleting model files for {model_id}")
+        deleted = await delete_model(model_id)
+
+        if deleted:
+            logger.info(f"Successfully deleted model {model_id}")
+        else:
+            logger.warning(f"Model {model_id} was not found on disk")
+
+        # Emit pending status to reset UI state, then remove from local tracking
+        if model_id in self.download_status:
+            current_status = self.download_status[model_id]
+            pending = DownloadPending(
+                shard_metadata=current_status.shard_metadata,
+                node_id=self.node_id,
+            )
+            await self.event_sender.send(
+                NodeDownloadProgress(download_progress=pending)
+            )
+            del self.download_status[model_id]
+
+    async def _forward_events(self) -> None:
+        with self.event_receiver as events:
+            async for event in events:
+                idx = next(self.event_index_counter)
+                fe = ForwarderEvent(
+                    origin_idx=idx,
+                    origin=self.node_id,
+                    session=self.session_id,
+                    event=event,
+                )
+                logger.debug(
+                    f"DownloadCoordinator published event {idx}: {str(event)[:100]}"
+                )
+                await self.local_event_sender.send(fe)
+
+    async def _emit_existing_download_progress(self) -> None:
+        try:
+            while True:
+                logger.info(
+                    "DownloadCoordinator: Fetching and emitting existing download progress..."
+                )
+                async for (
+                    _,
+                    progress,
+                ) in self.shard_downloader.get_shard_download_status():
+                    if progress.status == "complete":
+                        status: DownloadProgress = DownloadCompleted(
+                            node_id=self.node_id,
+                            shard_metadata=progress.shard,
+                            total_bytes=progress.total_bytes,
+                        )
+                    elif progress.status in ["in_progress", "not_started"]:
+                        if progress.downloaded_bytes_this_session.in_bytes == 0:
+                            status = DownloadPending(
+                                node_id=self.node_id, shard_metadata=progress.shard
+                            )
+                        else:
+                            status = DownloadOngoing(
+                                node_id=self.node_id,
+                                shard_metadata=progress.shard,
+                                download_progress=map_repo_download_progress_to_download_progress_data(
+                                    progress
+                                ),
+                            )
+                    else:
+                        continue
+
+                    self.download_status[progress.shard.model_card.model_id] = status
+                    await self.event_sender.send(
+                        NodeDownloadProgress(download_progress=status)
+                    )
+                logger.info(
+                    "DownloadCoordinator: Done emitting existing download progress."
+                )
+                await anyio.sleep(5 * 60)  # 5 minutes
+        except Exception as e:
+            logger.error(
+                f"DownloadCoordinator: Error emitting existing download progress: {e}"
+            )

src/exo/download/download_utils.py

@@ -24,7 +24,15 @@ from pydantic import (
     TypeAdapter,
 )
 
+from exo.download.huggingface_utils import (
+    filter_repo_objects,
+    get_allow_patterns,
+    get_auth_headers,
+    get_hf_endpoint,
+    get_hf_token,
+)
 from exo.shared.constants import EXO_MODELS_DIR
+from exo.shared.models.model_cards import ModelTask
 from exo.shared.types.common import ModelId
 from exo.shared.types.memory import Memory
 from exo.shared.types.worker.downloads import (
@@ -35,13 +43,6 @@ from exo.shared.types.worker.downloads import (
     RepoFileDownloadProgress,
 )
 from exo.shared.types.worker.shards import ShardMetadata
-from exo.worker.download.huggingface_utils import (
-    filter_repo_objects,
-    get_allow_patterns,
-    get_auth_headers,
-    get_hf_endpoint,
-    get_hf_token,
-)
 
 
 class HuggingFaceAuthenticationError(Exception):
@@ -120,11 +121,20 @@ async def ensure_models_dir() -> Path:
 
 
 async def delete_model(model_id: ModelId) -> bool:
-    model_dir = await ensure_models_dir() / model_id.normalize()
-    if not await aios.path.exists(model_dir):
-        return False
-    await asyncio.to_thread(shutil.rmtree, model_dir, ignore_errors=False)
-    return True
+    models_dir = await ensure_models_dir()
+    model_dir = models_dir / model_id.normalize()
+    cache_dir = models_dir / "caches" / model_id.normalize()
+
+    deleted = False
+    if await aios.path.exists(model_dir):
+        await asyncio.to_thread(shutil.rmtree, model_dir, ignore_errors=False)
+        deleted = True
+
+    # Also clear cache
+    if await aios.path.exists(cache_dir):
+        await asyncio.to_thread(shutil.rmtree, cache_dir, ignore_errors=False)
+
+    return deleted
 
 
 async def seed_models(seed_dir: str | Path):
@@ -150,16 +160,28 @@ async def fetch_file_list_with_cache(
     target_dir = (await ensure_models_dir()) / "caches" / model_id.normalize()
     await aios.makedirs(target_dir, exist_ok=True)
     cache_file = target_dir / f"{model_id.normalize()}--{revision}--file_list.json"
-    if await aios.path.exists(cache_file):
-        async with aiofiles.open(cache_file, "r") as f:
-            return TypeAdapter(list[FileListEntry]).validate_json(await f.read())
-    file_list = await fetch_file_list_with_retry(
-        model_id, revision, recursive=recursive
-    )
-    await aios.makedirs(cache_file.parent, exist_ok=True)
-    async with aiofiles.open(cache_file, "w") as f:
-        await f.write(TypeAdapter(list[FileListEntry]).dump_json(file_list).decode())
-    return file_list
+
+    # Always try fresh first
+    try:
+        file_list = await fetch_file_list_with_retry(
+            model_id, revision, recursive=recursive
+        )
+        # Update cache with fresh data
+        async with aiofiles.open(cache_file, "w") as f:
+            await f.write(
+                TypeAdapter(list[FileListEntry]).dump_json(file_list).decode()
+            )
+        return file_list
+    except Exception as e:
+        # Fetch failed - try cache fallback
+        if await aios.path.exists(cache_file):
+            logger.warning(
+                f"Failed to fetch file list for {model_id}, using cached data: {e}"
+            )
+            async with aiofiles.open(cache_file, "r") as f:
+                return TypeAdapter(list[FileListEntry]).validate_json(await f.read())
+        # No cache available, propagate the error
+        raise
 
 
 async def fetch_file_list_with_retry(
@@ -331,8 +353,28 @@ async def _download_file(
     target_dir: Path,
     on_progress: Callable[[int, int, bool], None] = lambda _, __, ___: None,
 ) -> Path:
-    if await aios.path.exists(target_dir / path):
-        return target_dir / path
+    target_path = target_dir / path
+
+    if await aios.path.exists(target_path):
+        local_size = (await aios.stat(target_path)).st_size
+
+        # Try to verify against remote, but allow offline operation
+        try:
+            remote_size, _ = await file_meta(model_id, revision, path)
+            if local_size != remote_size:
+                logger.info(
+                    f"File {path} size mismatch (local={local_size}, remote={remote_size}), re-downloading"
+                )
+                await aios.remove(target_path)
+            else:
+                return target_path
+        except Exception as e:
+            # Offline or network error - trust local file
+            logger.debug(
+                f"Could not verify {path} against remote (offline?): {e}, using local file"
+            )
+            return target_path
+
     await aios.makedirs((target_dir / path).parent, exist_ok=True)
     length, etag = await file_meta(model_id, revision, path)
     remote_hash = etag[:-5] if etag.endswith("-gzip") else etag
@@ -481,6 +523,11 @@ async def resolve_allow_patterns(shard: ShardMetadata) -> list[str]:
         return ["*"]
 
 
+def is_image_model(shard: ShardMetadata) -> bool:
+    tasks = shard.model_card.tasks
+    return ModelTask.TextToImage in tasks or ModelTask.ImageToImage in tasks
+
+
 async def get_downloaded_size(path: Path) -> int:
     partial_path = path.with_suffix(path.suffix + ".partial")
     if await aios.path.exists(path):
@@ -522,22 +569,40 @@ async def download_shard(
             file_list, allow_patterns=allow_patterns, key=lambda x: x.path
         )
     )
+
+    # For image models, skip root-level safetensors files since weights
+    # are stored in component subdirectories (e.g., transformer/, vae/)
+    if is_image_model(shard):
+        filtered_file_list = [
+            f
+            for f in filtered_file_list
+            if "/" in f.path or not f.path.endswith(".safetensors")
+        ]
     file_progress: dict[str, RepoFileDownloadProgress] = {}
 
     async def on_progress_wrapper(
         file: FileListEntry, curr_bytes: int, total_bytes: int, is_renamed: bool
     ) -> None:
-        start_time = (
-            file_progress[file.path].start_time
-            if file.path in file_progress
-            else time.time()
-        )
-        downloaded_this_session = (
-            file_progress[file.path].downloaded_this_session.in_bytes
-            + (curr_bytes - file_progress[file.path].downloaded.in_bytes)
-            if file.path in file_progress
-            else curr_bytes
+        previous_progress = file_progress.get(file.path)
+
+        # Detect re-download: curr_bytes < previous downloaded means file was deleted and restarted
+        is_redownload = (
+            previous_progress is not None
+            and curr_bytes < previous_progress.downloaded.in_bytes
         )
+
+        if is_redownload or previous_progress is None:
+            # Fresh download or re-download: reset tracking
+            start_time = time.time()
+            downloaded_this_session = curr_bytes
+        else:
+            # Continuing download: accumulate
+            start_time = previous_progress.start_time
+            downloaded_this_session = (
+                previous_progress.downloaded_this_session.in_bytes
+                + (curr_bytes - previous_progress.downloaded.in_bytes)
+            )
+
         speed = (
             downloaded_this_session / (time.time() - start_time)
             if time.time() - start_time > 0

src/exo/download/impl_shard_downloader.py

@@ -5,13 +5,13 @@ from typing import AsyncIterator, Callable
 
 from loguru import logger
 
-from exo.shared.models.model_cards import MODEL_CARDS, ModelCard, ModelId
+from exo.download.download_utils import RepoDownloadProgress, download_shard
+from exo.download.shard_downloader import ShardDownloader
+from exo.shared.models.model_cards import ModelCard, ModelId, get_model_cards
 from exo.shared.types.worker.shards import (
     PipelineShardMetadata,
     ShardMetadata,
 )
-from exo.worker.download.download_utils import RepoDownloadProgress, download_shard
-from exo.worker.download.shard_downloader import ShardDownloader
 
 
 def exo_shard_downloader(max_parallel_downloads: int = 8) -> ShardDownloader:
@@ -21,7 +21,7 @@ def exo_shard_downloader(max_parallel_downloads: int = 8) -> ShardDownloader:
 
 
 async def build_base_shard(model_id: ModelId) -> ShardMetadata:
-    model_card = await ModelCard.from_hf(model_id)
+    model_card = await ModelCard.load(model_id)
     return PipelineShardMetadata(
         model_card=model_card,
         device_rank=0,
@@ -160,15 +160,14 @@ class ResumableShardDownloader(ShardDownloader):
         # Kick off download status coroutines concurrently
         tasks = [
             asyncio.create_task(_status_for_model(model_card.model_id))
-            for model_card in MODEL_CARDS.values()
+            for model_card in await get_model_cards()
         ]
 
         for task in asyncio.as_completed(tasks):
             try:
                 yield await task
-            # TODO: except Exception
             except Exception as e:
-                logger.error("Error downloading shard:", e)
+                logger.warning(f"Error downloading shard: {type(e).__name__}")
 
     async def get_shard_download_status_for_shard(
         self, shard: ShardMetadata

src/exo/download/shard_downloader.py

@@ -5,13 +5,13 @@ from datetime import timedelta
 from pathlib import Path
 from typing import AsyncIterator, Callable
 
+from exo.download.download_utils import RepoDownloadProgress
 from exo.shared.models.model_cards import ModelCard, ModelId, ModelTask
 from exo.shared.types.memory import Memory
 from exo.shared.types.worker.shards import (
     PipelineShardMetadata,
     ShardMetadata,
 )
-from exo.worker.download.download_utils import RepoDownloadProgress
 
 
 # TODO: the PipelineShardMetadata getting reinstantiated is a bit messy. Should this be a classmethod?