diff --git a/shelly/README.md b/shelly/README.md
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+# Shelly
+
+Shelly is a plugin that uses the [Shelly Arch Package Manager](https://github.com/Seafoam-Labs/Shelly-ALPM) to display package update information in a bar widget.
+
+## Plugin
+
+| Field   | Value                                   |
+| ------- | --------------------------------------- |
+| ID      | `joshuaslate/shelly`                    |
+| Entries | Service: `poller`; bar widget: `shelly` |
+
+## Requirements
+
+Install the Shelly Arch Package Manager from the [AUR](https://aur.archlinux.org/packages/shelly).
+
+Test that it works by running `shelly check-updates` in a terminal. If it returns a list of packages, then it is working correctly.
+
+## Settings
+
+| Setting                | Type     | Default      | Description                                                                                        |
+| ---------------------- | -------- | ------------ | -------------------------------------------------------------------------------------------------- |
+| `interval`             | `int`    | `300`        | The interval (in seconds) between update checks                                                    |
+| `notify`               | `bool`   | `false`      | Whether or not you want to receive notifications when there are new package updates available      |
+| `color`                | `color`  | `on_surface` | The text color for the bar widget                                                                  |
+| `glyph_color`          | `color`  | `on_surface` | The color of the glyph on the bar widget                                                           |
+| `glyph`                | `glyph`  | `package`    | Bar widget icon.                                                                                   |
+| `click_action`         | `select` | `open_gui`   | The action to perform when the bar widget is clicked. Options: `open_gui`, `open_updater`, `none`. |
+| `hide_when_up_to_date` | `bool`   | `false`      | Whether or not to hide the bar widget when there are no package updates available                  |
diff --git a/shelly/plugin.toml b/shelly/plugin.toml
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+++ b/shelly/plugin.toml
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+id           = "joshuaslate/shelly"
+name         = "Shelly"
+icon         = "package"
+version      = "1.0.0"
+min_noctalia = "5.0.0"
+license = "MIT"
+author       = "joshuaslate"
+dependencies = ["shelly"]
+description = "A plugin that provides a widget for displaying system update information."
+tags         = ["system", "arch"]
+deprecated = false
+
+[[setting]]
+key     = "interval"
+type    = "int"
+label_key = "settings.interval.label"
+description_key = "settings.interval.description"
+default = 300
+min = 0
+
+[[setting]]
+key     = "notify"
+type    = "bool"
+label_key = "settings.notify.label"
+description_key = "settings.notify.description"
+default = false
+
+[[service]]
+id = "update_poller"
+entry = "poller.luau"
+
+[[widget]]
+id    = "shelly"
+entry = "widget.luau"
+
+  [[widget.setting]]
+  key = "hide_when_up_to_date"
+  type = "bool"
+  label_key = "settings.hide_when_up_to_date.label"
+  description_key = "settings.hide_when_up_to_date.description"
+  default = false
+
+  [[widget.setting]]
+  key = "color"
+  type = "color"
+  label_key = "settings.color.label"
+  description_key = "settings.color.description"
+  default = "on_surface"
+
+  [[widget.setting]]
+  key = "glyph"
+  type = "glyph"
+  label_key = "settings.glyph.label"
+  description_key = "settings.glyph.description"
+  default = "package"
+
+  [[widget.setting]]
+  key = "glyph_color"
+  type = "color"
+  label_key = "settings.glyph_color.label"
+  description_key = "settings.glyph_color.description"
+  default = "on_surface"
+
+  [[widget.setting]]
+  key = "click_action"
+  type = "select"
+  label_key = "settings.click_action.label"
+  description_key = "settings.click_action.description"
+  default = "open_gui"
+  options = [
+    { value = "none", label_key = "settings.click_action.options.none" },
+    { value = "open_gui", label_key = "settings.click_action.options.open_gui" },
+    { value = "open_updater", label_key = "settings.click_action.options.open_updater" }
+  ]
diff --git a/shelly/poller.luau b/shelly/poller.luau
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+++ b/shelly/poller.luau
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+--!nonstrict
+
+type Update = { Name: string, Version: string, OldVersion: string?, DownloadSize: string? }
+
+type UpdateResult = {
+    Packages: { [number]: Update },
+    Aur: { [number]: Update },
+    Flatpak: { [number]: Update },
+}
+
+local updates: UpdateResult = { Packages = {}, Aur = {}, Flatpak = {} }
+local updateError: string | nil = nil
+local updateInterval = (noctalia.getConfig("interval") or 300)*1000
+local isPolling = false
+
+noctalia.setUpdateInterval(updateInterval)
+
+function refresh()
+  isPolling = true
+
+  noctalia.runAsync("shelly check-updates --json", function(result)
+    isPolling = false
+
+    if result.exitCode ~= 0 then
+        updateError = result.stderr
+        noctalia.state.set("updates", nil)
+        noctalia.state.set("update_error", updateError)
+        return
+    end
+
+    local decoded = noctalia.json.decode(result.stdout)
+    if type(decoded) ~= "table" then
+        updateError = noctalia.tr("bar.tooltip.error.decode_json")
+        noctalia.state.set("update_error", updateError)
+        return
+    end
+
+    updates = {
+        Packages = decoded.Packages or {},
+        Aur = decoded.Aur or {},
+        Flatpak = decoded.Flatpak or {},
+    }
+
+    noctalia.state.set("updates", updates)
+    noctalia.state.set("update_error", nil)
+  end)
+end
+
+function update()
+  if isPolling then
+    return
+  end
+
+  refresh()
+end
+
+refresh()
diff --git a/shelly/thumbnail.webp b/shelly/thumbnail.webp
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index 0000000..0cbd49a
Binary files /dev/null and b/shelly/thumbnail.webp differ
diff --git a/shelly/translations/en.json b/shelly/translations/en.json
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index 0000000..25430a7
--- /dev/null
+++ b/shelly/translations/en.json
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+{
+  "title": "Shelly",
+  "notify": {
+    "new_updates": {
+      "title": "New Updates Available",
+      "description": "There are {count} new updates available for your system."
+    }
+  },
+  "bar": {
+    "text": {
+      "error": "?",
+      "updates": {
+        "one": "{count} Update",
+        "other": "{count} Updates"
+      }
+    },
+    "tooltip": {
+      "aur_title": "AUR",
+      "flatpak_title": "Flatpak",
+      "packages_title": "Packages",
+      "no_updates": "System is up to date",
+      "error": {
+        "decode_json": "Failed to decode output from `shelly check-updates --json`"
+      }
+    },
+    "click_handler": {
+      "error": {
+        "missing_gui": "Shelly GUI is not installed. Please install it to use this feature.",
+        "missing_cli": "Shelly CLI is not installed. Please install it to use this feature."
+      }
+    }
+  },
+  "settings": {
+    "interval": {
+      "label": "Refresh Seconds",
+      "description": "How often the service checks for updates in the background."
+    },
+    "notify": {
+      "label": "Notify",
+      "description": "Whether to show a notification when new updates are available."
+    },
+    "click_action": {
+      "label": "Click Action",
+      "description": "What happens when you click on the bar.",
+      "options": {
+        "none": "Nothing",
+        "open_gui": "Open Shelly GUI",
+        "open_updater": "Start Update in Terminal"
+      }
+    },
+    "hide_when_up_to_date": {
+      "label": "Hide When Up-to-Date",
+      "description": "Whether to hide the bar when there are no updates available."
+    },
+    "color": {
+      "label": "Color",
+      "description": "The color of the bar text."
+    },
+    "glyph": {
+      "label": "Glyph",
+      "description": "The glyph shown before the label."
+    },
+    "glyph_color": {
+      "label": "Glyph Color",
+      "description": "The color of the glyph."
+    }
+  }
+}
diff --git a/shelly/widget.luau b/shelly/widget.luau
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index 0000000..6c9ec87
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+++ b/shelly/widget.luau
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+--!nonstrict
+local glyph = barWidget.getConfig("glyph")
+local color = barWidget.getConfig("color") or "on_surface"
+local glyphColor = barWidget.getConfig("glyph_color") or color
+local updateError = noctalia.state.get("update_error")
+local notifyOnNewUpdates = barWidget.getConfig("notify")
+local hideWhenUpToDate = barWidget.getConfig("hide_when_up_to_date")
+local click_action = barWidget.getConfig("click_action") or "open_gui"
+local updates = noctalia.state.get("updates") or { Packages = {}, Aur = {}, Flatpak = {} }
+
+local function countUpdates(scopedUpdates)
+    return #scopedUpdates.Packages + #scopedUpdates.Aur + #scopedUpdates.Flatpak
+end
+
+local function getUpdateLabel(update)
+  if update.OldVersion then
+    return string.format("%s → %s", update.OldVersion, update.Version)
+  else
+    return update.Version
+  end
+end
+
+local function appendUpdateSection(rows, title, list)
+    if #list == 0 then
+        return
+    end
+
+    table.insert(rows, {
+        key = title,
+        value = string.format("%d", #list),
+    })
+
+    for _, pkg in ipairs(list) do
+        table.insert(rows, {
+            key = "  " .. pkg.Name,
+            value = getUpdateLabel(pkg),
+        })
+
+        if pkg.DownloadSize then
+            table.insert(rows, {
+                key = "",
+                value = pkg.DownloadSize,
+            })
+        end
+    end
+end
+
+local function updateTooltip(count)
+  if updateError then
+    barWidget.setTooltip(updateError)
+    return
+  end
+
+  if count == 0 then
+    barWidget.setTooltip(noctalia.tr("bar.tooltip.no_updates"))
+    return
+  end
+
+  local rows = {}
+
+  appendUpdateSection(rows, noctalia.tr("bar.tooltip.packages_title"), updates.Packages)
+  appendUpdateSection(rows, noctalia.tr("bar.tooltip.aur_title"), updates.Aur)
+  appendUpdateSection(rows, noctalia.tr("bar.tooltip.flatpak_title"), updates.Flatpak)
+
+  barWidget.setTooltip(rows)
+end
+
+local function render()
+  local container = barWidget.isVertical() and ui.column or ui.row
+
+  local count = countUpdates(updates)
+
+  barWidget.render(container({ gap = 6, align = "center", visible = not hideWhenUpToDate or count > 0 }, {
+    ui.glyph({ name = glyph, size = 14, color = glyphColor, visible = glyph ~= "" }),
+    ui.label({ text = noctalia.trp("bar.text.updates", count), color = color }),
+  }))
+
+  updateTooltip(count)
+end
+
+noctalia.state.watch("updates", function(value)
+  local prevCount = countUpdates(updates)
+  local newCount = countUpdates(value)
+
+  updates = value
+
+  if notifyOnNewUpdates and newCount > prevCount then
+      noctalia.notify(noctalia.tr("notify.new_updates.title"), noctalia.trp("notify.new_updates.description", newCount))
+  end
+
+  render()
+end)
+
+function onClick()
+  if click_action == "open_gui" then
+    local cmd = "shelly-ui"
+
+    if not noctalia.commandExists(cmd) then
+      noctalia.notifyError("Shelly", noctalia.tr("bar.click_handler.error.missing_gui"))
+      return
+    end
+
+    noctalia.runAsync(cmd)
+  elseif click_action == "open_updater" then
+    local cmd = "shelly"
+
+    if not noctalia.commandExists(cmd) then
+      noctalia.notifyError("Shelly", noctalia.tr("bar.click_handler.error.missing_cli"))
+      return
+    end
+
+    noctalia.runInTerminal(cmd .. " upgrade-all")
+  end
+end
+
+render()