diff --git a/CMakeLists.txt b/CMakeLists.txt
index e18de16..4c39e6a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -35,10 +35,6 @@ add_executable(f00bar
   xcb.c xcb.h
   yml.c yml.h
 
-  decorations/background.c decorations/background.h
-  decorations/stack.c decorations/stack.h
-  decorations/underline.c decorations/underline.h
-
   particles/dynlist.c particles/dynlist.h
   )
 
@@ -70,9 +66,11 @@ target_link_libraries(f00bar
   )
 
 set_property(TARGET f00bar PROPERTY INSTALL_RPATH \$ORIGIN/../lib/f00bar)
-set_property(TARGET f00bar PROPERTY BUILD_RPATH "\$ORIGIN/modules;\$ORIGIN/particles")
+set_property(TARGET f00bar PROPERTY
+  BUILD_RPATH "\$ORIGIN/modules;\$ORIGIN/particles;\$ORIGIN/decorations")
 
 install(TARGETS f00bar DESTINATION bin)
 
-add_subdirectory(particles)
 add_subdirectory(modules)
+add_subdirectory(particles)
+add_subdirectory(decorations)
diff --git a/config-verify.c b/config-verify.c
index 3ab76f9..f5bb00d 100644
--- a/config-verify.c
+++ b/config-verify.c
@@ -164,25 +164,6 @@ conf_verify_font(keychain_t *chain, const struct yml_node *node)
     return conf_verify_dict(chain, node, attrs);
 }
 
-static bool
-verify_decoration_stack(keychain_t *chain, const struct yml_node *node)
-{
-    if (!yml_is_list(node)) {
-        LOG_ERR("%s: must be a list of decorations", conf_err_prefix(chain, node));
-        return false;
-    }
-
-    for (struct yml_list_iter it = yml_list_iter(node);
-         it.node != NULL;
-         yml_list_next(&it))
-    {
-        if (!conf_verify_decoration(chain, it.node))
-            return false;
-    }
-
-    return true;
-}
-
 bool
 conf_verify_decoration(keychain_t *chain, const struct yml_node *node)
 {
@@ -204,47 +185,19 @@ conf_verify_decoration(keychain_t *chain, const struct yml_node *node)
         return false;
     }
 
-    if (strcmp(deco_name, "stack") == 0) {
-        bool ret = verify_decoration_stack(chain_push(chain, deco_name), values);
-        chain_pop(chain);
-        return ret;
+    const struct deco_iface *iface = plugin_load_deco(deco_name);
+    if (iface == NULL) {
+        LOG_ERR("%s: invalid decoration name: %s",
+                conf_err_prefix(chain, deco), deco_name);
+        return false;
     }
 
-    static const struct attr_info background[] = {
-        {"color", true, &conf_verify_color},
-        {NULL, false, NULL},
-    };
+    chain_push(chain, deco_name);
+    if (!iface->verify_conf(chain, values))
+        return false;
 
-    static const struct attr_info underline[] = {
-        {"size", true, &conf_verify_int},
-        {"color", true, &conf_verify_color},
-        {NULL, false, NULL},
-    };
-
-    static const struct {
-        const char *name;
-        const struct attr_info *attrs;
-        size_t count;
-    } decos[] = {
-        {"background", background, sizeof(background) / sizeof(background[0])},
-        {"underline", underline, sizeof(underline) / sizeof(underline[0])},
-    };
-
-    for (size_t i = 0; i < sizeof(decos) / sizeof(decos[0]); i++) {
-        if (strcmp(decos[i].name, deco_name) != 0)
-            continue;
-
-        chain_push(chain, deco_name);
-        if (!conf_verify_dict(chain, values, decos[i].attrs))
-            return false;
-
-        chain_pop(chain);
-        return true;
-    }
-
-    LOG_ERR(
-        "%s: invalid decoration name: %s", conf_err_prefix(chain, deco), deco_name);
-    return false;
+    chain_pop(chain);
+    return true;
 }
 
 bool
diff --git a/config.c b/config.c
index 505cb45..63b4809 100644
--- a/config.c
+++ b/config.c
@@ -7,16 +7,10 @@
 
 #include <dlfcn.h>
 
-#include "color.h"
-
-#include "decoration.h"
-#include "decorations/background.h"
-#include "decorations/stack.h"
-#include "decorations/underline.h"
-
 #include "bar.h"
-#include "module.h"
+#include "color.h"
 #include "config-verify.h"
+#include "module.h"
 #include "plugin.h"
 
 static uint8_t
@@ -77,60 +71,18 @@ conf_to_font(const struct yml_node *node)
     return font_new(family != NULL ? yml_value_as_string(family) : "monospace");
 }
 
-static struct deco *
-deco_background_from_config(const struct yml_node *node)
-{
-    const struct yml_node *color = yml_get_value(node, "color");
-    return deco_background(conf_to_color(color));
-}
-
-static struct deco *
-deco_underline_from_config(const struct yml_node *node)
-{
-    const struct yml_node *size = yml_get_value(node, "size");
-    const struct yml_node *color = yml_get_value(node, "color");
-    return deco_underline(yml_value_as_int(size), conf_to_color(color));
-}
-
-static struct deco *deco_from_config(const struct yml_node *node);
-
-static struct deco *
-deco_stack_from_config(const struct yml_node *node)
-{
-    size_t count = yml_list_length(node);
-
-    struct deco *decos[count];
-    size_t idx = 0;
-
-    for (struct yml_list_iter it = yml_list_iter(node);
-         it.node != NULL;
-         yml_list_next(&it), idx++)
-    {
-        decos[idx] = deco_from_config(it.node);
-    }
-
-    return deco_stack(decos, count);
-}
-
-static struct deco *
-deco_from_config(const struct yml_node *node)
+struct deco *
+conf_to_deco(const struct yml_node *node)
 {
     struct yml_dict_iter it = yml_dict_iter(node);
     const struct yml_node *deco_type = it.key;
     const struct yml_node *deco_data = it.value;
 
     const char *type = yml_value_as_string(deco_type);
+    const struct deco_iface *iface = plugin_load_deco(type);
 
-    if (strcmp(type, "background") == 0)
-        return deco_background_from_config(deco_data);
-    else if (strcmp(type, "underline") == 0)
-        return deco_underline_from_config(deco_data);
-    else if (strcmp(type, "stack") == 0)
-        return deco_stack_from_config(deco_data);
-    else
-        assert(false);
-
-    return NULL;
+    assert(iface != NULL);
+    return iface->from_conf(deco_data);
 }
 
 static struct particle *
@@ -191,7 +143,7 @@ conf_to_particle(const struct yml_node *node, struct conf_inherit inherited)
 
     const char *on_click_template
         = on_click != NULL ? yml_value_as_string(on_click) : NULL;
-    struct deco *deco = deco_node != NULL ? deco_from_config(deco_node) : NULL;
+    struct deco *deco = deco_node != NULL ? conf_to_deco(deco_node) : NULL;
 
     /*
      * Font and foreground are inheritable attributes. Each particle
diff --git a/config.h b/config.h
index 3579877..ee3f281 100644
--- a/config.h
+++ b/config.h
@@ -21,5 +21,6 @@ struct conf_inherit {
     struct rgba foreground;
 };
 
-struct particle * conf_to_particle(
+struct particle *conf_to_particle(
     const struct yml_node *node, struct conf_inherit inherited);
+struct deco *conf_to_deco(const struct yml_node *node);
diff --git a/decoration.h b/decoration.h
index b40602c..78f2f05 100644
--- a/decoration.h
+++ b/decoration.h
@@ -8,3 +8,6 @@ struct deco {
                    int x, int y, int width, int height);
     void (*destroy)(struct deco *deco);
 };
+
+#define DECORATION_COMMON_ATTRS  \
+    {NULL, false, NULL}
diff --git a/decorations/CMakeLists.txt b/decorations/CMakeLists.txt
new file mode 100644
index 0000000..dd06e9d
--- /dev/null
+++ b/decorations/CMakeLists.txt
@@ -0,0 +1,24 @@
+cmake_minimum_required(VERSION 3.13)
+
+add_library(decoration-sdk INTERFACE)
+target_compile_options(decoration-sdk INTERFACE ${CAIRO_CFLAGS_OTHER})
+target_include_directories(decoration-sdk INTERFACE ${CAIRO_INCLUDE_DIRS})
+
+set(CMAKE_SHARED_MODULE_PREFIX decoration_)
+
+add_library(background MODULE background.c)
+target_link_libraries(background decoration-sdk)
+
+add_library(stack MODULE stack.c)
+target_link_libraries(stack decoration-sdk)
+
+add_library(underline MODULE underline.c)
+target_link_libraries(underline decoration-sdk)
+
+install(
+  TARGETS
+  background
+  stack
+  underline
+
+  DESTINATION lib/f00bar)
diff --git a/decorations/background.c b/decorations/background.c
index b0a15a6..0a0c218 100644
--- a/decorations/background.c
+++ b/decorations/background.c
@@ -1,7 +1,9 @@
-#include "background.h"
-
 #include <stdlib.h>
 
+#include "../config.h"
+#include "../config-verify.h"
+#include "../decoration.h"
+
 struct private {
     struct rgba color;
 };
@@ -24,8 +26,8 @@ expose(const struct deco *deco, cairo_t *cr, int x, int y, int width, int height
     cairo_fill(cr);
 }
 
-struct deco *
-deco_background(struct rgba color)
+static struct deco *
+background_new(struct rgba color)
 {
     struct private *priv = malloc(sizeof(*priv));
     priv->color = color;
@@ -37,3 +39,21 @@ deco_background(struct rgba color)
 
     return deco;
 }
+
+struct deco *
+from_conf(const struct yml_node *node)
+{
+    const struct yml_node *color = yml_get_value(node, "color");
+    return background_new(conf_to_color(color));
+}
+
+bool
+verify_conf(keychain_t *chain, const struct yml_node *node)
+{
+    static const struct attr_info attrs[] = {
+        {"color", true, &conf_verify_color},
+        DECORATION_COMMON_ATTRS,
+    };
+
+    return conf_verify_dict(chain, node, attrs);
+}
diff --git a/decorations/background.h b/decorations/background.h
deleted file mode 100644
index b926e2f..0000000
--- a/decorations/background.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#pragma once
-
-#include "../color.h"
-#include "../decoration.h"
-
-struct deco *deco_background(struct rgba color);
diff --git a/decorations/stack.c b/decorations/stack.c
index d7410e4..38d3a74 100644
--- a/decorations/stack.c
+++ b/decorations/stack.c
@@ -1,7 +1,11 @@
-#include "underline.h"
-
 #include <stdlib.h>
 
+#define LOG_MODULE "stack"
+#include "../log.h"
+#include "../config.h"
+#include "../config-verify.h"
+#include "../decoration.h"
+
 struct private {
     struct deco **decos;
     size_t count;
@@ -26,8 +30,8 @@ expose(const struct deco *deco, cairo_t *cr, int x, int y, int width, int height
         d->decos[i]->expose(d->decos[i], cr, x, y, width, height);
 }
 
-struct deco *
-deco_stack(struct deco *decos[], size_t count)
+static struct deco *
+stack_new(struct deco *decos[], size_t count)
 {
     struct private *priv = malloc(sizeof(*priv));
     priv->decos = malloc(count * sizeof(priv->decos[0]));
@@ -43,3 +47,39 @@ deco_stack(struct deco *decos[], size_t count)
 
     return deco;
 }
+struct deco *
+from_conf(const struct yml_node *node)
+{
+    size_t count = yml_list_length(node);
+
+    struct deco *decos[count];
+    size_t idx = 0;
+
+    for (struct yml_list_iter it = yml_list_iter(node);
+         it.node != NULL;
+         yml_list_next(&it), idx++)
+    {
+        decos[idx] = conf_to_deco(it.node);
+    }
+
+    return stack_new(decos, count);
+}
+
+bool
+verify_conf(keychain_t *chain, const struct yml_node *node)
+{
+    if (!yml_is_list(node)) {
+        LOG_ERR("%s: must be a list of decorations", conf_err_prefix(chain, node));
+        return false;
+    }
+
+    for (struct yml_list_iter it = yml_list_iter(node);
+         it.node != NULL;
+         yml_list_next(&it))
+    {
+        if (!conf_verify_decoration(chain, it.node))
+            return false;
+    }
+
+    return true;
+}
diff --git a/decorations/stack.h b/decorations/stack.h
deleted file mode 100644
index ab0380a..0000000
--- a/decorations/stack.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#pragma once
-
-#include "../color.h"
-#include "../decoration.h"
-
-struct deco *deco_stack(struct deco *decos[], size_t count);
diff --git a/decorations/underline.c b/decorations/underline.c
index 0b7ce27..838f9a0 100644
--- a/decorations/underline.c
+++ b/decorations/underline.c
@@ -1,7 +1,9 @@
-#include "underline.h"
-
 #include <stdlib.h>
 
+#include "../config.h"
+#include "../config-verify.h"
+#include "../decoration.h"
+
 struct private {
     int size;
     struct rgba color;
@@ -25,8 +27,8 @@ expose(const struct deco *deco, cairo_t *cr, int x, int y, int width, int height
     cairo_fill(cr);
 }
 
-struct deco *
-deco_underline(int size, struct rgba color)
+static struct deco *
+underline_new(int size, struct rgba color)
 {
     struct private *priv = malloc(sizeof(*priv));
     priv->size = size;
@@ -39,3 +41,23 @@ deco_underline(int size, struct rgba color)
 
     return deco;
 }
+
+struct deco *
+from_conf(const struct yml_node *node)
+{
+    const struct yml_node *size = yml_get_value(node, "size");
+    const struct yml_node *color = yml_get_value(node, "color");
+    return underline_new(yml_value_as_int(size), conf_to_color(color));
+}
+
+bool
+verify_conf(keychain_t *chain, const struct yml_node *node)
+{
+    static const struct attr_info attrs[] = {
+        {"size", true, &conf_verify_int},
+        {"color", true, &conf_verify_color},
+        DECORATION_COMMON_ATTRS,
+    };
+
+    return conf_verify_dict(chain, node, attrs);
+}
diff --git a/decorations/underline.h b/decorations/underline.h
deleted file mode 100644
index 7b69ef6..0000000
--- a/decorations/underline.h
+++ /dev/null
@@ -1,6 +0,0 @@
-#pragma once
-
-#include "../color.h"
-#include "../decoration.h"
-
-struct deco *deco_underline(int size, struct rgba color);
diff --git a/modules/alsa.c b/modules/alsa.c
index 3ba2892..be6d876 100644
--- a/modules/alsa.c
+++ b/modules/alsa.c
@@ -8,6 +8,7 @@
 #include "../log.h"
 #include "../bar.h"
 #include "../config.h"
+#include "../config-verify.h"
 #include "../tllist.h"
 
 struct private {
diff --git a/modules/backlight.c b/modules/backlight.c
index 6f9bf46..dee1cc0 100644
--- a/modules/backlight.c
+++ b/modules/backlight.c
@@ -14,6 +14,7 @@
 #include "../log.h"
 #include "../bar.h"
 #include "../config.h"
+#include "../config-verify.h"
 
 struct private {
     struct particle *label;
@@ -41,11 +42,15 @@ content(struct module *mod)
     const struct private *m = mod->private;
 
     mtx_lock(&mod->lock);
+
+    const long current = m->current_brightness;
+    const long max = m->max_brightness;
+    const long percent = max > 0 ? 100 * current / max : 0;
+
     struct tag_set tags = {
         .tags = (struct tag *[]){
-            tag_new_int_range(
-                mod, "brightness", m->current_brightness, 0, m->max_brightness),
-            tag_new_int_range(mod, "percent", 100 * m->current_brightness / m->max_brightness, 0, 100),
+            tag_new_int_range(mod, "brightness", current, 0, max),
+            tag_new_int_range(mod, "percent", percent, 0, 100),
         },
         .count = 2,
     };
diff --git a/modules/battery.c b/modules/battery.c
index 303c80b..2fef9d1 100644
--- a/modules/battery.c
+++ b/modules/battery.c
@@ -15,6 +15,7 @@
 #include "../log.h"
 #include "../bar.h"
 #include "../config.h"
+#include "../config-verify.h"
 
 enum state { STATE_FULL, STATE_CHARGING, STATE_DISCHARGING };
 
diff --git a/modules/clock.c b/modules/clock.c
index f87995b..e982907 100644
--- a/modules/clock.c
+++ b/modules/clock.c
@@ -7,6 +7,7 @@
 
 #include "../bar.h"
 #include "../config.h"
+#include "../config-verify.h"
 
 struct private {
     struct particle *label;
diff --git a/modules/i3.c b/modules/i3.c
index b48772a..e079429 100644
--- a/modules/i3.c
+++ b/modules/i3.c
@@ -20,6 +20,7 @@
 #include "../log.h"
 #include "../bar.h"
 #include "../config.h"
+#include "../config-verify.h"
 
 #include "../particles/dynlist.h"
 
diff --git a/modules/label.c b/modules/label.c
index fb0857d..73d10f5 100644
--- a/modules/label.c
+++ b/modules/label.c
@@ -4,6 +4,7 @@
 #include <poll.h>
 
 #include "../config.h"
+#include "../config-verify.h"
 #include "../module.h"
 
 struct private {
diff --git a/modules/mpd.c b/modules/mpd.c
index fae5c35..b4e31b4 100644
--- a/modules/mpd.c
+++ b/modules/mpd.c
@@ -17,6 +17,7 @@
 #include "../log.h"
 #include "../bar.h"
 #include "../config.h"
+#include "../config-verify.h"
 
 enum state {
     STATE_OFFLINE = 1000,
diff --git a/modules/network.c b/modules/network.c
index 42a087f..09c0cf4 100644
--- a/modules/network.c
+++ b/modules/network.c
@@ -17,6 +17,7 @@
 #include "../log.h"
 #include "../bar.h"
 #include "../config.h"
+#include "../config-verify.h"
 #include "../module.h"
 #include "../tllist.h"
 
diff --git a/modules/removables.c b/modules/removables.c
index b56467e..1b24a6c 100644
--- a/modules/removables.c
+++ b/modules/removables.c
@@ -17,6 +17,7 @@
 #include "../log.h"
 #include "../bar.h"
 #include "../config.h"
+#include "../config-verify.h"
 #include "../particles/dynlist.h"
 #include "../tllist.h"
 
diff --git a/modules/xkb.c b/modules/xkb.c
index 9cb422c..8f9ad83 100644
--- a/modules/xkb.c
+++ b/modules/xkb.c
@@ -12,6 +12,7 @@
 #include "../log.h"
 #include "../bar.h"
 #include "../config.h"
+#include "../config-verify.h"
 #include "../xcb.h"
 
 struct layout {
diff --git a/modules/xwindow.c b/modules/xwindow.c
index 8fcef32..67e36d5 100644
--- a/modules/xwindow.c
+++ b/modules/xwindow.c
@@ -16,6 +16,7 @@
 #include "../log.h"
 #include "../bar.h"
 #include "../config.h"
+#include "../config-verify.h"
 #include "../xcb.h"
 
 struct private {
diff --git a/particle.h b/particle.h
index db552d1..ed569d1 100644
--- a/particle.h
+++ b/particle.h
@@ -2,7 +2,6 @@
 #include <cairo.h>
 
 #include "color.h"
-#include "config-verify.h"
 #include "decoration.h"
 #include "font.h"
 #include "tag.h"
diff --git a/particles/CMakeLists.txt b/particles/CMakeLists.txt
index c66fc55..f588b8b 100644
--- a/particles/CMakeLists.txt
+++ b/particles/CMakeLists.txt
@@ -6,22 +6,22 @@ target_include_directories(particle-sdk INTERFACE ${CAIRO_INCLUDE_DIRS})
 
 set(CMAKE_SHARED_MODULE_PREFIX particle_)
 
-add_library(empty MODULE empty.c empty.h)
+add_library(empty MODULE empty.c)
 target_link_libraries(empty particle-sdk)
 
-add_library(list MODULE list.c list.h)
+add_library(list MODULE list.c)
 target_link_libraries(list particle-sdk)
 
-add_library(map MODULE map.c map.h)
+add_library(map MODULE map.c)
 target_link_libraries(map particle-sdk)
 
-add_library(progress-bar MODULE progress-bar.c progress-bar.h)
+add_library(progress-bar MODULE progress-bar.c)
 target_link_libraries(progress-bar particle-sdk)
 
-add_library(ramp MODULE ramp.c ramp.h)
+add_library(ramp MODULE ramp.c)
 target_link_libraries(ramp particle-sdk)
 
-add_library(string MODULE string.c string.h)
+add_library(string MODULE string.c)
 target_link_libraries(string particle-sdk)
 
 install(
diff --git a/particles/empty.c b/particles/empty.c
index 8ed3813..d8b4df4 100644
--- a/particles/empty.c
+++ b/particles/empty.c
@@ -1,6 +1,7 @@
 #include <stdlib.h>
 
 #include "../config.h"
+#include "../config-verify.h"
 #include "../particle.h"
 
 static int
diff --git a/particles/list.c b/particles/list.c
index 3ee6abb..43f3874 100644
--- a/particles/list.c
+++ b/particles/list.c
@@ -4,6 +4,7 @@
 #define LOG_ENABLE_DBG 1
 #include "../log.h"
 #include "../config.h"
+#include "../config-verify.h"
 #include "../particle.h"
 
 struct private {
diff --git a/particles/map.c b/particles/map.c
index 405060e..99625d0 100644
--- a/particles/map.c
+++ b/particles/map.c
@@ -5,6 +5,7 @@
 #define LOG_MODULE "map"
 #include "../log.h"
 #include "../config.h"
+#include "../config-verify.h"
 #include "../particle.h"
 
 struct particle_map {
diff --git a/particles/progress-bar.c b/particles/progress-bar.c
index ff71b98..130bc76 100644
--- a/particles/progress-bar.c
+++ b/particles/progress-bar.c
@@ -6,6 +6,7 @@
 #define LOG_ENABLE_DBG 0
 #include "../log.h"
 #include "../config.h"
+#include "../config-verify.h"
 #include "../particle.h"
 
 struct private {
diff --git a/particles/ramp.c b/particles/ramp.c
index f8b4091..0ef91b8 100644
--- a/particles/ramp.c
+++ b/particles/ramp.c
@@ -5,6 +5,7 @@
 #include <stdio.h>
 
 #include "../config.h"
+#include "../config-verify.h"
 #include "../particle.h"
 
 struct private {
diff --git a/particles/string.c b/particles/string.c
index 1ebe4e4..7b66c86 100644
--- a/particles/string.c
+++ b/particles/string.c
@@ -6,6 +6,7 @@
 #define LOG_ENABLE_DBG 1
 #include "../log.h"
 #include "../config.h"
+#include "../config-verify.h"
 #include "../particle.h"
 
 struct private {
diff --git a/plugin.c b/plugin.c
index 0786a56..b43a12f 100644
--- a/plugin.c
+++ b/plugin.c
@@ -15,8 +15,9 @@ static const char *
 type2str(enum plugin_type type)
 {
     switch (type) {
-    case PLUGIN_MODULE:   return "module";
-    case PLUGIN_PARTICLE: return "particle";
+    case PLUGIN_MODULE:     return "module";
+    case PLUGIN_PARTICLE:   return "particle";
+    case PLUGIN_DECORATION: return "decoration";
     }
 
     return NULL;
@@ -53,10 +54,9 @@ plugin_load(const char *name, enum plugin_type type)
         }
     }
 
+
     char path[128];
-    snprintf(
-        path, sizeof(path), "%s_%s.so",
-        type == PLUGIN_MODULE ? "module" : "particle", name);
+    snprintf(path, sizeof(path), "%s_%s.so", type2str(type), name);
 
     /* Not loaded - do it now */
     void *lib = dlopen(path, RTLD_LOCAL | RTLD_NOW);
@@ -102,3 +102,10 @@ plugin_load_particle(const char *name)
     const struct plugin *plug = plugin_load(name, PLUGIN_PARTICLE);
     return plug != NULL ? &plug->particle : NULL;
 }
+
+const struct deco_iface *
+plugin_load_deco(const char *name)
+{
+    const struct plugin *plug = plugin_load(name, PLUGIN_DECORATION);
+    return plug != NULL ? &plug->decoration : NULL;
+}
diff --git a/plugin.h b/plugin.h
index aa910c7..2e923c9 100644
--- a/plugin.h
+++ b/plugin.h
@@ -4,22 +4,30 @@
 #include "module.h"
 #include "particle.h"
 
+typedef bool (*verify_func_t)(keychain_t *chain, const struct yml_node *node);
+
 struct module_iface {
-    bool (*verify_conf)(keychain_t *chain, const struct yml_node *node);
+    verify_func_t verify_conf;
     struct module *(*from_conf)(
         const struct yml_node *node, struct conf_inherit inherited);
 };
 
 struct particle_iface {
-    bool (*verify_conf)(keychain_t *chain, const struct yml_node *node);
+    verify_func_t verify_conf;
     struct particle *(*from_conf)(
         const struct yml_node *node, struct particle *common);
 };
 
+struct deco_iface {
+    verify_func_t verify_conf;
+    struct deco *(*from_conf)(const struct yml_node *node);
+};
+
 const struct module_iface *plugin_load_module(const char *name);
 const struct particle_iface *plugin_load_particle(const char *name);
+const struct deco_iface *plugin_load_deco(const char *name);
 
-enum plugin_type { PLUGIN_MODULE, PLUGIN_PARTICLE };
+enum plugin_type { PLUGIN_MODULE, PLUGIN_PARTICLE, PLUGIN_DECORATION };
 
 struct plugin {
     char *name;
@@ -34,6 +42,7 @@ struct plugin {
 
         struct module_iface module;
         struct particle_iface particle;
+        struct deco_iface decoration;
     };
 };