skill(dms-plugin-dev): update for composite plugins, startupCheck, IPC discovery (#2699)

- Add composite plugin type with multi-surface components field
- Add startupCheck manifest field and dependency gating docs
- Add IPC runtime plugin discovery commands (plugin-scan target)
- Add getPluginPath() to data persistence reference
- Document bar reveal visibility optimization for widget plugins
- Sync plugin-schema.json with source, add dependencies field
- Bump skill version to 1.1

.agents/skills/dms-plugin-dev/SKILL.md

@@ -2,15 +2,16 @@
 name: dms-plugin-dev
 description: >
   Develop plugins for DankMaterialShell (DMS), a QML-based Linux desktop shell built on
-  Quickshell. Supports four plugin types: widget (bar + Control Center), daemon (background
-  service), launcher (search + actions), and desktop (draggable desktop widgets). Covers
-  manifest creation, QML component development, settings UI, data persistence, theme
-  integration, PopoutService usage, and external command execution. Use when the user wants
-  to create, modify, or debug a DMS plugin, or asks about the DMS plugin API.
+  Quickshell. Supports five plugin types: widget (bar + Control Center), daemon (background
+  service), launcher (search + actions), desktop (draggable desktop widgets), and composite
+  (multi-surface). Covers manifest creation, QML component development, startup checks,
+  settings UI, data persistence, theme integration, PopoutService usage, IPC runtime
+  discovery, and external command execution. Use when the user wants to create, modify,
+  or debug a DMS plugin, or asks about the DMS plugin API.
 compatibility: Designed for Claude Code (or similar products)
 metadata:
   author: DankMaterialShell
-  version: "1.0"
+  version: "1.1"
   domain: qml-desktop-development
   framework: DankMaterialShell
   languages: qml, javascript
@@ -37,14 +38,15 @@ integrations, and desktop widgets. Plugins are QML components discovered from
 
 **Plugin registry:** Community plugins are available at https://plugins.danklinux.com/
 
-**Four plugin types:**
+**Five plugin types:**
 
-| Type       | Purpose                        | Base Component             | Bar pills | CC integration |
-|------------|--------------------------------|----------------------------|-----------|----------------|
-| `widget`   | Bar widget + popout            | `PluginComponent`          | Yes       | Yes            |
-| `daemon`   | Background service             | `PluginComponent` (no UI)  | No        | Optional       |
-| `launcher` | Searchable items in launcher   | `Item`                     | No        | No             |
-| `desktop`  | Draggable desktop widget       | `DesktopPluginComponent`   | No        | No             |
+| Type        | Purpose                        | Base Component             | Bar pills | CC integration |
+|-------------|--------------------------------|----------------------------|-----------|----------------|
+| `widget`    | Bar widget + popout            | `PluginComponent`          | Yes       | Yes            |
+| `daemon`    | Background service             | `PluginComponent` (no UI)  | No        | Optional       |
+| `launcher`  | Searchable items in launcher   | `Item`                     | No        | No             |
+| `desktop`   | Draggable desktop widget       | `DesktopPluginComponent`   | No        | No             |
+| `composite` | Multi-surface plugin           | One component per surface  | Optional  | Optional       |
 
 ## Step 1: Determine Plugin Type
 
@@ -58,6 +60,9 @@ Choose the type based on what the plugin does:
   with trigger-based filtering (e.g., type `=` for calculator, `:` for emoji).
 - **Shows on the desktop background?** - Use `desktop`. Draggable, resizable widget on the
   desktop layer.
+- **Needs multiple surfaces?** - Use `composite`. A single plugin that registers any combination
+  of the above (e.g., a daemon + bar widget + desktop widget). Each surface gets its own
+  QML component file.
 
 ## Step 2: Create the Manifest
 
@@ -78,7 +83,7 @@ Create `plugin.json` in your plugin directory. See [plugin-manifest-reference.md
 }
 ```
 
-**With settings and permissions:**
+**With settings, startup check, and permissions:**
 
 ```json
 {
@@ -92,7 +97,31 @@ Create `plugin.json` in your plugin directory. See [plugin-manifest-reference.md
     "component": "./YourWidget.qml",
     "icon": "extension",
     "settings": "./Settings.qml",
+    "startupCheck": "./StartupCheck.qml",
     "requires_dms": ">=0.1.0",
+    "dependencies": ["mytool"],
+    "permissions": ["settings_read", "settings_write"]
+}
+```
+
+**Composite plugin (multi-surface):**
+
+```json
+{
+    "id": "myComposite",
+    "name": "My Composite Plugin",
+    "description": "Daemon + widget + desktop from one plugin",
+    "version": "1.0.0",
+    "author": "Your Name",
+    "type": "composite",
+    "capabilities": ["daemon", "dankbar-widget", "desktop-widget"],
+    "icon": "extension",
+    "components": {
+        "daemon": "./MyDaemon.qml",
+        "widget": "./MyBarWidget.qml",
+        "desktop": "./MyDesktopWidget.qml"
+    },
+    "settings": "./Settings.qml",
     "permissions": ["settings_read", "settings_write"]
 }
 ```
@@ -100,9 +129,11 @@ Create `plugin.json` in your plugin directory. See [plugin-manifest-reference.md
 **Key rules:**
 - `id` must be camelCase, matching pattern `^[a-zA-Z][a-zA-Z0-9]*$`
 - `version` must be semver (e.g., `1.0.0`)
-- `component` must start with `./` and end with `.qml`
-- `type: "launcher"` requires a `trigger` field
+- Provide either `component` (single-surface) or `components` (multi-surface), not both
+- `component` / component paths must start with `./` and end with `.qml`
+- `type: "launcher"` (or a `components` object with a `launcher` key) requires a `trigger` field
 - `settings_write` permission is **required** if the plugin has a settings component
+- `dependencies` replaces the deprecated `requires` field
 
 ## Step 3: Create the Main Component
 
@@ -249,7 +280,69 @@ PluginComponent {
 
 See [daemon-plugin-guide.md](references/daemon-plugin-guide.md) for event-driven patterns and process execution.
 
-## Step 4: Add Settings (Optional)
+### Composite
+
+For composite plugins, create a separate QML file per surface. Each surface uses the same
+base component as the corresponding single-surface type (PluginComponent for widget/daemon,
+Item for launcher, etc.). All surfaces share the same `pluginId` and `pluginService`.
+
+```
+MyCompositePlugin/
+  plugin.json
+  MyBarWidget.qml      # PluginComponent (widget surface)
+  MyDaemon.qml         # PluginComponent (daemon surface)
+  MyDesktopWidget.qml  # Item with desktop widget properties
+  Settings.qml         # Shared settings for all surfaces
+```
+
+Use `pluginService.pluginHasSurface(pluginId, "widget")` to check whether a specific surface
+is registered for a plugin at runtime.
+
+## Step 4: Add Startup Check (Optional)
+
+Gate plugin activation on dependency checks by providing a `startupCheck` component. This
+runs before the plugin loads and blocks activation if a required tool or condition is missing.
+
+Create a `StartupCheck.qml` (non-visual QtObject):
+
+```qml
+import QtQuick
+import qs.Common
+
+QtObject {
+    function check(done) {
+        Proc.runCommand("myPlugin.depCheck", ["sh", "-c", "command -v mytool"], (stdout, exitCode) => {
+            if (exitCode === 0) {
+                done(null);
+                return;
+            }
+            done({
+                "title": I18n.tr("mytool is required"),
+                "details": I18n.tr("Install 'mytool' and re-enable this plugin.")
+            });
+        });
+    }
+}
+```
+
+The `done` callback accepts:
+- `null` - allow activation
+- A string - block with a short error message
+- `{ title, details }` - block with a title and expandable details body
+
+A synchronous variant (no `done` parameter, return the result directly) is also supported.
+
+Failed checks show a toast error and store the error in `pluginService.pluginLoadErrors`.
+
+Add to your manifest:
+```json
+{
+    "startupCheck": "./StartupCheck.qml",
+    "dependencies": ["mytool"]
+}
+```
+
+## Step 5: Add Settings (Optional)
 
 Wrap settings in `PluginSettings` with your `pluginId`. All settings auto-save and auto-load.
 
@@ -293,7 +386,7 @@ See [settings-components-reference.md](references/settings-components-reference.
 
 **Important:** Your plugin must declare `"permissions": ["settings_write"]` in plugin.json, or the settings UI will show an error.
 
-## Step 5: Use Data Persistence
+## Step 6: Use Data Persistence
 
 Three tiers of persistence:
 
@@ -302,6 +395,7 @@ Three tiers of persistence:
 | `pluginService.savePluginData(id, key, val)` / `loadPluginData(id, key, default)` | Yes (settings.json) | User preferences, config |
 | `pluginService.savePluginState(id, key, val)` / `loadPluginState(id, key, default)` | Yes (separate state file) | Runtime state, history, cache |
 | `PluginGlobalVar { varName; defaultValue; value; set() }` | No (runtime only) | Cross-instance shared state |
+| `pluginService.getPluginPath(id)` | N/A | Get the plugin's installation directory path |
 
 - `pluginData` is a reactive property on PluginComponent, auto-loaded from settings
 - React to settings changes with `Connections { target: pluginService; function onPluginDataChanged(id) { ... } }`
@@ -309,7 +403,7 @@ Three tiers of persistence:
 
 See [data-persistence-guide.md](references/data-persistence-guide.md) for details and examples.
 
-## Step 6: Theme Integration
+## Step 7: Theme Integration
 
 Always use `Theme.*` properties from `qs.Common` - never hardcode colors or sizes.
 
@@ -324,7 +418,7 @@ Always use `Theme.*` properties from `qs.Common` - never hardcode colors or size
 
 See [theme-reference.md](references/theme-reference.md) for the complete property list.
 
-## Step 7: Add Popout Content (Widgets Only)
+## Step 8: Add Popout Content (Widgets Only)
 
 Add a popout that opens when the bar pill is clicked:
 
@@ -360,7 +454,7 @@ PluginComponent {
 
 Calculate available content height: `popoutHeight - headerHeight - detailsHeight - spacing`
 
-## Step 8: Control Center Integration (Widgets Only)
+## Step 9: Control Center Integration (Widgets Only)
 
 Add your widget to the Control Center grid:
 
@@ -389,7 +483,7 @@ PluginComponent {
 
 **CC sizing:** 25% width = SmallToggleButton (icon only), 50% width = ToggleButton or CompoundPill (if ccDetailContent is defined).
 
-## Step 9: External Commands and Clipboard
+## Step 10: External Commands and Clipboard
 
 **Run commands and capture output:**
 
@@ -420,18 +514,33 @@ Quickshell.execDetached(["dms", "cl", "copy", textToCopy])
 
 **Do NOT use** `globalThis.clipboard` or browser JavaScript APIs - they don't exist in the QML runtime.
 
-## Step 10: Validate and Test
+## Step 11: Validate and Test
 
 1. Validate `plugin.json` against the schema at [assets/plugin-schema.json](assets/plugin-schema.json)
 2. Run the shell with verbose output: `qs -v -p $CONFIGPATH/quickshell/dms/shell.qml`
 3. Open Settings > Plugins > Scan for Plugins
 4. Enable your plugin and add it to the DankBar layout
 
+**Runtime plugin discovery via IPC:**
+
+Plugins can be scanned, rescanned, and reloaded at runtime without restarting the shell:
+
+```bash
+dms ipc plugin-scan scan          # Trigger a full rescan of all plugin directories
+dms ipc plugin-scan rescan <id>   # Force rescan of a specific plugin
+dms ipc plugin-scan reload <id>   # Force reload of a loaded plugin
+dms ipc plugin-scan list          # List all known plugins (TSV: id, loaded, type, name)
+dms ipc plugin-scan status <id>   # Get status of a specific plugin (TSV: loaded, type, error)
+```
+
+Plugin IDs are validated against `^[a-zA-Z0-9_\-:]{1,64}$`.
+
 **Common issues:**
 - Plugin not detected: check plugin.json syntax with `jq . plugin.json`
 - Widget not showing: ensure it's enabled AND added to a DankBar section
 - Settings error: verify `settings_write` permission is declared
 - Data not persisting: check pluginService injection and permissions
+- Startup check failing: check `pluginService.pluginLoadErrors` or run `dms ipc plugin-scan status <id>`
 
 ## Common Mistakes
 
@@ -445,6 +554,9 @@ Quickshell.execDetached(["dms", "cl", "copy", textToCopy])
 8. **Forgetting `categories` in launcher items** - Items won't display without it
 9. **Not handling null pluginService** - Always use optional chaining or null checks
 10. **Using `PluginComponent` for launchers** - Launchers use plain `Item`, not `PluginComponent`
+11. **Using `requires` instead of `dependencies`** - `requires` is deprecated; use `dependencies`
+12. **Providing both `component` and `components`** - Use one or the other, not both
+13. **Missing `trigger` on composite with launcher surface** - Still required when `components` has a `launcher` key
 
 ## Quick Reference: Imports
 

.agents/skills/dms-plugin-dev/assets/plugin-schema.json

@@ -11,8 +11,7 @@
     "version",
     "author",
     "type",
-    "capabilities",
-    "component"
+    "capabilities"
   ],
   "properties": {
     "id": {
@@ -42,8 +41,8 @@
     },
     "type": {
       "type": "string",
-      "description": "Plugin type",
-      "enum": ["widget", "daemon", "launcher", "desktop"]
+      "description": "Plugin type. Use 'composite' (or any value) together with 'components' to provide multiple surfaces from one plugin.",
+      "enum": ["widget", "daemon", "launcher", "desktop", "composite"]
     },
     "capabilities": {
       "type": "array",
@@ -55,9 +54,37 @@
     },
     "component": {
       "type": "string",
-      "description": "Relative path to main QML component file",
+      "description": "Relative path to main QML component file. Required unless 'components' is provided.",
       "pattern": "^\\./.*\\.qml$"
     },
+    "components": {
+      "type": "object",
+      "description": "Map of surface name to relative QML component path, for multi-surface (composite) plugins. Provide any subset of surfaces; each is loaded independently.",
+      "properties": {
+        "widget": {
+          "type": "string",
+          "description": "Bar/Control Center widget component (PluginComponent)",
+          "pattern": "^\\./.*\\.qml$"
+        },
+        "desktop": {
+          "type": "string",
+          "description": "Desktop widget component",
+          "pattern": "^\\./.*\\.qml$"
+        },
+        "daemon": {
+          "type": "string",
+          "description": "Background daemon component (instantiated once)",
+          "pattern": "^\\./.*\\.qml$"
+        },
+        "launcher": {
+          "type": "string",
+          "description": "Launcher provider component (requires 'trigger')",
+          "pattern": "^\\./.*\\.qml$"
+        }
+      },
+      "additionalProperties": false,
+      "minProperties": 1
+    },
     "trigger": {
       "type": "string",
       "description": "Trigger string for launcher activation (required for launcher type)"
@@ -71,14 +98,26 @@
       "description": "Path to settings component QML file",
       "pattern": "^\\./.*\\.qml$"
     },
+    "startupCheck": {
+      "type": "string",
+      "description": "Path to a non-visual (QtObject) component exposing a check(done) function that gates activation. done(null) allows; done(error) blocks, where error is a string or { title, details }.",
+      "pattern": "^\\./.*\\.qml$"
+    },
     "requires_dms": {
       "type": "string",
       "description": "Minimum DMS version requirement (e.g., '>=0.1.18', '>0.1.0')",
       "pattern": "^(>=?|<=?|=|>|<)\\d+\\.\\d+\\.\\d+$"
     },
+    "dependencies": {
+      "type": "array",
+      "description": "Array of required system tools/dependencies (registry metadata)",
+      "items": {
+        "type": "string"
+      }
+    },
     "requires": {
       "type": "array",
-      "description": "Array of required system tools/dependencies",
+      "description": "Deprecated alias for 'dependencies'.",
       "items": {
         "type": "string"
       }
@@ -109,6 +148,29 @@
       "then": {
         "required": ["trigger"]
       }
+    },
+    {
+      "if": {
+        "required": ["components"],
+        "properties": {
+          "components": {
+            "required": ["launcher"]
+          }
+        }
+      },
+      "then": {
+        "required": ["trigger"]
+      }
+    },
+    {
+      "anyOf": [
+        {
+          "required": ["component"]
+        },
+        {
+          "required": ["components"]
+        }
+      ]
     }
   ],
   "additionalProperties": true

.agents/skills/dms-plugin-dev/references/data-persistence-guide.md

@@ -166,6 +166,16 @@ function increment() {
 | Cross-instance sync (multi-monitor data) | `PluginGlobalVar` or `getGlobalVar`/`setGlobalVar` | No (runtime only) | All instances |
 | Quick reactive reads from settings | `pluginData` property | N/A (read-only) | Per instance |
 
+## Plugin Path
+
+Retrieve a plugin's installation directory at runtime:
+
+```qml
+var dir = pluginService.getPluginPath(pluginId)
+```
+
+Returns the absolute path to the plugin's directory (e.g., `~/.config/DankMaterialShell/plugins/MyPlugin`), or an empty string if the plugin is not found. Useful for loading bundled assets (images, data files) relative to the plugin's location.
+
 ## Important Notes
 
 1. **pluginData is reactive** - bindings update automatically when data changes

.agents/skills/dms-plugin-dev/references/plugin-manifest-reference.md

@@ -9,15 +9,22 @@
 | `description` | string | Short description (shown in UI) | Non-empty |
 | `version` | string | Semantic version | Pattern `^\d+\.\d+\.\d+(-[a-zA-Z0-9.-]+)?(\+[a-zA-Z0-9.-]+)?$` |
 | `author` | string | Creator name or email | Non-empty |
-| `type` | string | Plugin type | One of: `widget`, `daemon`, `launcher`, `desktop` |
+| `type` | string | Plugin type | One of: `widget`, `daemon`, `launcher`, `desktop`, `composite` |
 | `capabilities` | array | Plugin capabilities | At least 1 string item |
-| `component` | string | Path to main QML file | Must start with `./`, end with `.qml` |
+
+One of `component` or `components` is required (not both):
+
+| Field | Type | Description | Validation |
+|-------|------|-------------|------------|
+| `component` | string | Path to main QML file (single-surface plugins) | Must start with `./`, end with `.qml` |
+| `components` | object | Map of surface name to QML path (multi-surface plugins) | At least 1 entry; keys: `widget`, `desktop`, `daemon`, `launcher` |
 
 ## Conditional Requirements
 
 | Condition | Required Field | Description |
 |-----------|---------------|-------------|
 | `type: "launcher"` | `trigger` | Trigger string for launcher activation (e.g., `=`, `#`, `!`) |
+| `components` has `launcher` key | `trigger` | Same requirement applies to composite plugins with a launcher surface |
 
 ## Optional Fields
 
@@ -25,8 +32,10 @@
 |-------|------|-------------|
 | `icon` | string | Material Design icon name (displayed in plugin list UI) |
 | `settings` | string | Path to settings QML file (must start with `./`, end with `.qml`) |
+| `startupCheck` | string | Path to a QtObject component that gates plugin activation via a `check(done)` function (must start with `./`, end with `.qml`). See Startup Check section below. |
 | `requires_dms` | string | Minimum DMS version (e.g., `>=0.1.18`), pattern `^(>=?\|<=?\|=\|>\|<)\d+\.\d+\.\d+$` |
-| `requires` | array | System tool dependencies (e.g., `["curl", "jq"]`) |
+| `dependencies` | array | System tool dependencies (e.g., `["curl", "jq"]`). Registry metadata. |
+| `requires` | array | Deprecated alias for `dependencies` |
 | `permissions` | array | Required permissions |
 | `trigger` | string | Launcher trigger string (required for launcher type) |
 
@@ -53,6 +62,65 @@ Capabilities are free-form strings that describe what the plugin does. Common va
 - `ai` - AI/LLM integration
 - `slideout` - uses slideout panel
 
+## Startup Check
+
+The `startupCheck` field points to a non-visual `QtObject` component that gates plugin activation on dependency checks. The component must expose a `check(done)` function:
+
+```qml
+import QtQuick
+import qs.Common
+
+QtObject {
+    function check(done) {
+        Proc.runCommand("myPlugin.depCheck", ["sh", "-c", "command -v mytool"], (stdout, exitCode) => {
+            if (exitCode === 0) {
+                done(null);
+                return;
+            }
+            done({
+                "title": I18n.tr("mytool is required"),
+                "details": I18n.tr("Install 'mytool' and re-enable this plugin.")
+            });
+        });
+    }
+}
+```
+
+The `done` callback accepts:
+- `null` - allow activation
+- A string - block with a short error message
+- `{ title, details }` - block with a title and expandable details
+
+A synchronous variant (no `done` parameter, return the result directly) is also supported.
+
+Failed startup checks show a toast error and store the error in `pluginService.pluginLoadErrors`.
+
+## Components (Composite Plugins)
+
+The `components` field maps surface names to QML paths, allowing a single plugin to register multiple surfaces:
+
+```json
+{
+    "id": "myComposite",
+    "name": "My Composite Plugin",
+    "description": "Daemon + widget + desktop from one plugin",
+    "version": "1.0.0",
+    "author": "Developer Name",
+    "type": "composite",
+    "capabilities": ["daemon", "dankbar-widget", "desktop-widget"],
+    "icon": "extension",
+    "components": {
+        "daemon": "./MyDaemon.qml",
+        "widget": "./MyBarWidget.qml",
+        "desktop": "./MyDesktopWidget.qml"
+    },
+    "settings": "./Settings.qml",
+    "permissions": ["settings_read", "settings_write"]
+}
+```
+
+Valid surface keys: `widget`, `desktop`, `daemon`, `launcher`. Provide any subset. Each surface is loaded independently in the appropriate registry.
+
 ## Complete Example
 
 ```json
@@ -67,8 +135,9 @@ Capabilities are free-form strings that describe what the plugin does. Common va
     "component": "./MyWidget.qml",
     "icon": "extension",
     "settings": "./Settings.qml",
+    "startupCheck": "./StartupCheck.qml",
     "requires_dms": ">=0.1.18",
-    "requires": ["curl", "jq"],
+    "dependencies": ["curl", "jq"],
     "permissions": ["settings_read", "settings_write", "process", "network"]
 }
 ```

.agents/skills/dms-plugin-dev/references/widget-plugin-guide.md

@@ -235,10 +235,12 @@ Conditionally show/hide the bar pill:
 ```qml
 PluginComponent {
     visibilityCommand: "pgrep -x myapp"
-    visibilityInterval: 5  // seconds between checks; polling pauses while the bar is hidden
+    visibilityInterval: 5  // seconds between checks
 }
 ```
 
+**Bar reveal optimization:** The visibility timer automatically pauses while the bar is hidden (auto-hide mode) and resumes checks when the bar is revealed. This is handled via the internal `_barRevealed` property - no plugin code needed. Plugins using `visibilityCommand` with `visibilityInterval` benefit from this automatically.
+
 ## Popout Namespace
 
 For plugins with multiple popout instances, use `layerNamespacePlugin` to isolate popout state: