diff --git a/include/sway/config.h b/include/sway/config.h
index 48a8b0abb..48ebba3bf 100644
--- a/include/sway/config.h
+++ b/include/sway/config.h
@@ -10,8 +10,8 @@
 #include <xkbcommon/xkbcommon.h>
 #include <time.h>
 #include "list.h"
-#include "layout.h"
-#include "container.h"
+#include "tree/layout.h"
+#include "tree/container.h"
 
 /**
  * Describes a variable created via the `set` command.
diff --git a/include/sway/criteria.h b/include/sway/criteria.h
index 9b4b4befa..431cfa3a5 100644
--- a/include/sway/criteria.h
+++ b/include/sway/criteria.h
@@ -1,7 +1,7 @@
 #ifndef _SWAY_CRITERIA_H
 #define _SWAY_CRITERIA_H
 
-#include "container.h"
+#include "tree/container.h"
 #include "list.h"
 
 /**
diff --git a/include/sway/ipc-json.h b/include/sway/ipc-json.h
index eef5a018c..76b7d45b2 100644
--- a/include/sway/ipc-json.h
+++ b/include/sway/ipc-json.h
@@ -1,7 +1,7 @@
 #ifndef _SWAY_IPC_JSON_H
 #define _SWAY_IPC_JSON_H
 #include <json-c/json.h>
-#include "sway/container.h"
+#include "sway/tree/container.h"
 #include "sway/input/input-manager.h"
 
 json_object *ipc_json_get_version();
diff --git a/include/sway/ipc-server.h b/include/sway/ipc-server.h
index bcf1c4338..db690b6ec 100644
--- a/include/sway/ipc-server.h
+++ b/include/sway/ipc-server.h
@@ -1,13 +1,15 @@
 #ifndef _SWAY_IPC_SERVER_H
 #define _SWAY_IPC_SERVER_H
 #include <sys/socket.h>
-#include "sway/container.h"
+#include "sway/tree/container.h"
 #include "ipc.h"
 
 struct sway_server;
 
 void ipc_init(struct sway_server *server);
+
 void ipc_terminate(void);
+
 struct sockaddr_un *ipc_user_sockaddr(void);
 
 void ipc_event_window(swayc_t *window, const char *change);
diff --git a/include/sway/container.h b/include/sway/tree/container.h
similarity index 61%
rename from include/sway/container.h
rename to include/sway/tree/container.h
index f200a1a2e..5a2ae3499 100644
--- a/include/sway/container.h
+++ b/include/sway/tree/container.h
@@ -20,60 +20,43 @@ struct sway_seat;
  * it on this list.
  */
 enum swayc_types {
-	C_ROOT,      /**< The root container. Only one of these ever exists. */
-	C_OUTPUT,    /**< An output (aka monitor, head, etc). */
-	C_WORKSPACE, /**< A workspace. */
-	C_CONTAINER, /**< A manually created container. */
-	C_VIEW,      /**< A view (aka window). */
+	C_ROOT,
+	C_OUTPUT,
+	C_WORKSPACE,
+	C_CONTAINER,
+	C_VIEW,
 
 	C_TYPES,
 };
 
-/**
- * Different ways to arrange a container.
- */
 enum swayc_layouts {
-	L_NONE,     /**< Used for containers that have no layout (views, root) */
+	L_NONE,
 	L_HORIZ,
 	L_VERT,
 	L_STACKED,
 	L_TABBED,
-	L_FLOATING, /**< A psuedo-container, removed from the tree, to hold floating windows */
-
-	/* Awesome/Monad style auto layouts */
-	L_AUTO_LEFT,
-	L_AUTO_RIGHT,
-	L_AUTO_TOP,
-	L_AUTO_BOTTOM,
-
-	L_AUTO_FIRST = L_AUTO_LEFT,
-	L_AUTO_LAST = L_AUTO_BOTTOM,
+	L_FLOATING,
 
 	// Keep last
 	L_LAYOUTS,
 };
 
 enum swayc_border_types {
-	B_NONE,   /**< No border */
-	B_PIXEL,  /**< 1px border */
-	B_NORMAL, /**< Normal border with title bar */
+	B_NONE,
+	B_PIXEL,
+	B_NORMAL,
 };
 
 struct sway_root;
 struct sway_output;
 struct sway_view;
 
-/**
- * Stores information about a container.
- *
- * The tree is made of these. Views are containers that cannot have children.
- */
 struct sway_container {
 	union {
 		// TODO: Encapsulate state for other node types as well like C_CONTAINER
-		struct sway_root *sway_root;             // C_ROOT
-		struct sway_output *sway_output;         // C_OUTPUT
-		struct sway_view *sway_view;             // C_VIEW
+		struct sway_root *sway_root;
+		struct sway_output *sway_output;
+		struct sway_view *sway_view;
 	};
 
 	/**
@@ -89,38 +72,17 @@ struct sway_container {
 	enum swayc_layouts prev_layout;
 	enum swayc_layouts workspace_layout;
 
-	/**
-	 * The coordinates that this view appear at, relative to the output they
-	 * are located on (output containers have absolute coordinates).
-	 */
+    // TODO convert to layout coordinates
 	double x, y;
 
-	/**
-	 * Width and height of this container, without borders or gaps.
-	 */
+    // does not include borders or gaps.
 	double width, height;
 
 	list_t *children;
 
-	/**
-	 * The parent of this container. NULL for the root container.
-	 */
 	struct sway_container *parent;
 
-	/**
-	 * Number of master views in auto layouts.
-	 */
-	size_t nb_master;
-
-	/**
-	 * Number of slave groups (e.g. columns) in auto layouts.
-	 */
-	size_t nb_slave_groups;
-
-	/**
-	 * Marks applied to the container, list_t of char*.
-	 */
-	list_t *marks;
+	list_t *marks; // list of char*
 
 	struct {
 		struct wl_signal destroy;
@@ -130,8 +92,11 @@ struct sway_container {
 void swayc_descendants_of_type(swayc_t *root, enum swayc_types type,
 		void (*func)(swayc_t *item, void *data), void *data);
 
+// TODO only one container create function and pass the type?
 swayc_t *new_output(struct sway_output *sway_output);
+
 swayc_t *new_workspace(swayc_t *output, const char *name);
+
 swayc_t *new_view(swayc_t *sibling, struct sway_view *sway_view);
 
 swayc_t *destroy_output(swayc_t *output);
@@ -145,10 +110,12 @@ swayc_t *next_view_sibling(struct sway_seat *seat);
  */
 swayc_t *swayc_by_test(swayc_t *container,
 		bool (*test)(swayc_t *view, void *data), void *data);
+
 /**
  * Finds a parent container with the given swayc_type.
  */
 swayc_t *swayc_parent_by_type(swayc_t *container, enum swayc_types type);
+
 /**
  * Maps a container's children over a function.
  */
diff --git a/include/sway/layout.h b/include/sway/tree/layout.h
similarity index 88%
rename from include/sway/layout.h
rename to include/sway/tree/layout.h
index e82c4442a..39b7fb24c 100644
--- a/include/sway/layout.h
+++ b/include/sway/tree/layout.h
@@ -2,7 +2,7 @@
 #define _SWAY_LAYOUT_H
 
 #include <wlr/types/wlr_output_layout.h>
-#include "sway/container.h"
+#include "sway/tree/container.h"
 
 enum movement_direction {
 	MOVE_LEFT,
@@ -31,12 +31,20 @@ struct sway_root {
 };
 
 void init_layout(void);
+
 void add_child(struct sway_container *parent, struct sway_container *child);
+
 swayc_t *add_sibling(swayc_t *parent, swayc_t *child);
+
 struct sway_container *remove_child(struct sway_container *child);
+
 enum swayc_layouts default_layout(struct sway_container *output);
+
 void sort_workspaces(struct sway_container *output);
-void arrange_windows(struct sway_container *container, double width, double height);
+
+void arrange_windows(struct sway_container *container,
+		double width, double height);
+
 swayc_t *get_swayc_in_direction(swayc_t *container,
 		struct sway_seat *seat, enum movement_direction dir);
 
diff --git a/include/sway/view.h b/include/sway/tree/view.h
similarity index 96%
rename from include/sway/view.h
rename to include/sway/tree/view.h
index b28862113..e5f53f4e6 100644
--- a/include/sway/view.h
+++ b/include/sway/tree/view.h
@@ -62,10 +62,6 @@ enum sway_view_prop {
 	VIEW_PROP_INSTANCE,
 };
 
-/**
- * sway_view is a state container for surfaces that are arranged in the sway
- * tree (shell surfaces).
- */
 struct sway_view {
 	enum sway_view_type type;
 	struct sway_container *swayc;
diff --git a/include/sway/workspace.h b/include/sway/tree/workspace.h
similarity index 93%
rename from include/sway/workspace.h
rename to include/sway/tree/workspace.h
index fee54255c..c8ce40d15 100644
--- a/include/sway/workspace.h
+++ b/include/sway/tree/workspace.h
@@ -1,20 +1,26 @@
 #ifndef _SWAY_WORKSPACE_H
 #define _SWAY_WORKSPACE_H
 
-#include "sway/container.h"
+#include "sway/tree/container.h"
 
 extern char *prev_workspace_name;
 
 char *workspace_next_name(const char *output_name);
+
 swayc_t *workspace_create(const char *name);
+
 bool workspace_switch(swayc_t *workspace);
 
 struct sway_container *workspace_by_number(const char* name);
+
 swayc_t *workspace_by_name(const char*);
 
 struct sway_container *workspace_output_next(swayc_t *current);
+
 struct sway_container *workspace_next(swayc_t *current);
+
 struct sway_container *workspace_output_prev(swayc_t *current);
+
 struct sway_container *workspace_prev(swayc_t *current);
 
 #endif
diff --git a/sway/commands/exec_always.c b/sway/commands/exec_always.c
index 61870c513..954950e76 100644
--- a/sway/commands/exec_always.c
+++ b/sway/commands/exec_always.c
@@ -6,8 +6,8 @@
 #include <unistd.h>
 #include "sway/commands.h"
 #include "sway/config.h"
-#include "sway/container.h"
-#include "sway/workspace.h"
+#include "sway/tree/container.h"
+#include "sway/tree/workspace.h"
 #include "log.h"
 #include "stringop.h"
 
diff --git a/sway/commands/focus.c b/sway/commands/focus.c
index f1a8078f7..18e9e0bf5 100644
--- a/sway/commands/focus.c
+++ b/sway/commands/focus.c
@@ -3,10 +3,11 @@
 #include "log.h"
 #include "sway/input/input-manager.h"
 #include "sway/input/seat.h"
-#include "sway/view.h"
+#include "sway/tree/view.h"
 #include "sway/commands.h"
 
-static bool parse_movement_direction(const char *name, enum movement_direction *out) {
+static bool parse_movement_direction(const char *name,
+		enum movement_direction *out) {
 	if (strcasecmp(name, "left") == 0) {
 		*out = MOVE_LEFT;
 	} else if (strcasecmp(name, "right") == 0) {
diff --git a/sway/commands/kill.c b/sway/commands/kill.c
index f408ce2a9..c0faed7ab 100644
--- a/sway/commands/kill.c
+++ b/sway/commands/kill.c
@@ -2,7 +2,7 @@
 #include "log.h"
 #include "sway/input/input-manager.h"
 #include "sway/input/seat.h"
-#include "sway/view.h"
+#include "sway/tree/view.h"
 #include "sway/commands.h"
 
 struct cmd_results *cmd_kill(int argc, char **argv) {
diff --git a/sway/commands/layout.c b/sway/commands/layout.c
index b0fc5d664..2b193136d 100644
--- a/sway/commands/layout.c
+++ b/sway/commands/layout.c
@@ -1,8 +1,8 @@
 #include <string.h>
 #include <strings.h>
 #include "sway/commands.h"
-#include "sway/container.h"
-#include "sway/layout.h"
+#include "sway/tree/container.h"
+#include "sway/tree/layout.h"
 #include "log.h"
 
 struct cmd_results *cmd_layout(int argc, char **argv) {
diff --git a/sway/commands/reload.c b/sway/commands/reload.c
index d54d40db6..8cef789ba 100644
--- a/sway/commands/reload.c
+++ b/sway/commands/reload.c
@@ -1,6 +1,6 @@
 #include "sway/commands.h"
 #include "sway/config.h"
-#include "sway/layout.h"
+#include "sway/tree/layout.h"
 
 struct cmd_results *cmd_reload(int argc, char **argv) {
 	struct cmd_results *error = NULL;
diff --git a/sway/commands/workspace.c b/sway/commands/workspace.c
index fa8913984..8751dffea 100644
--- a/sway/commands/workspace.c
+++ b/sway/commands/workspace.c
@@ -4,7 +4,7 @@
 #include "sway/commands.h"
 #include "sway/config.h"
 #include "sway/input/seat.h"
-#include "sway/workspace.h"
+#include "sway/tree/workspace.h"
 #include "list.h"
 #include "log.h"
 #include "stringop.h"
diff --git a/sway/config.c b/sway/config.c
index 213e7680a..0b29735a6 100644
--- a/sway/config.c
+++ b/sway/config.c
@@ -24,7 +24,7 @@
 #include "sway/input/seat.h"
 #include "sway/commands.h"
 #include "sway/config.h"
-#include "sway/layout.h"
+#include "sway/tree/layout.h"
 #include "readline.h"
 #include "stringop.h"
 #include "list.h"
diff --git a/sway/criteria.c b/sway/criteria.c
index 2eee331c1..b8b581ed3 100644
--- a/sway/criteria.c
+++ b/sway/criteria.c
@@ -4,9 +4,9 @@
 #include <stdbool.h>
 #include <pcre.h>
 #include "sway/criteria.h"
-#include "sway/container.h"
+#include "sway/tree/container.h"
 #include "sway/config.h"
-#include "sway/view.h"
+#include "sway/tree/view.h"
 #include "stringop.h"
 #include "list.h"
 #include "log.h"
diff --git a/sway/desktop/layer_shell.c b/sway/desktop/layer_shell.c
index bd62f84a4..137b3260d 100644
--- a/sway/desktop/layer_shell.c
+++ b/sway/desktop/layer_shell.c
@@ -7,7 +7,7 @@
 #include <wlr/types/wlr_output.h>
 #include <wlr/util/log.h>
 #include "sway/layers.h"
-#include "sway/layout.h"
+#include "sway/tree/layout.h"
 #include "sway/output.h"
 #include "sway/server.h"
 
diff --git a/sway/desktop/output.c b/sway/desktop/output.c
index 9e7fbcc68..debda396f 100644
--- a/sway/desktop/output.c
+++ b/sway/desktop/output.c
@@ -11,14 +11,14 @@
 #include <wlr/types/wlr_surface.h>
 #include <wlr/types/wlr_wl_shell.h>
 #include "log.h"
-#include "sway/container.h"
+#include "sway/tree/container.h"
 #include "sway/input/input-manager.h"
 #include "sway/input/seat.h"
 #include "sway/layers.h"
-#include "sway/layout.h"
+#include "sway/tree/layout.h"
 #include "sway/output.h"
 #include "sway/server.h"
-#include "sway/view.h"
+#include "sway/tree/view.h"
 
 /**
  * Rotate a child's position relative to a parent. The parent size is (pw, ph),
diff --git a/sway/desktop/wl_shell.c b/sway/desktop/wl_shell.c
index 0356aa811..bb97fad43 100644
--- a/sway/desktop/wl_shell.c
+++ b/sway/desktop/wl_shell.c
@@ -3,10 +3,10 @@
 #include <stdlib.h>
 #include <wayland-server.h>
 #include <wlr/types/wlr_wl_shell.h>
-#include "sway/container.h"
-#include "sway/layout.h"
+#include "sway/tree/container.h"
+#include "sway/tree/layout.h"
 #include "sway/server.h"
-#include "sway/view.h"
+#include "sway/tree/view.h"
 #include "sway/input/seat.h"
 #include "sway/input/input-manager.h"
 #include "log.h"
diff --git a/sway/desktop/xdg_shell_v6.c b/sway/desktop/xdg_shell_v6.c
index 7bc171499..25ffacbb5 100644
--- a/sway/desktop/xdg_shell_v6.c
+++ b/sway/desktop/xdg_shell_v6.c
@@ -3,10 +3,10 @@
 #include <stdlib.h>
 #include <wayland-server.h>
 #include <wlr/types/wlr_xdg_shell_v6.h>
-#include "sway/container.h"
-#include "sway/layout.h"
+#include "sway/tree/container.h"
+#include "sway/tree/layout.h"
 #include "sway/server.h"
-#include "sway/view.h"
+#include "sway/tree/view.h"
 #include "sway/input/seat.h"
 #include "sway/input/input-manager.h"
 #include "log.h"
diff --git a/sway/desktop/xwayland.c b/sway/desktop/xwayland.c
index f9b5242b6..7f66f746f 100644
--- a/sway/desktop/xwayland.c
+++ b/sway/desktop/xwayland.c
@@ -5,10 +5,10 @@
 #include <wlr/xwayland.h>
 #include <wlr/types/wlr_output_layout.h>
 #include <wlr/types/wlr_output.h>
-#include "sway/container.h"
-#include "sway/layout.h"
+#include "sway/tree/container.h"
+#include "sway/tree/layout.h"
 #include "sway/server.h"
-#include "sway/view.h"
+#include "sway/tree/view.h"
 #include "sway/output.h"
 #include "sway/input/seat.h"
 #include "sway/input/input-manager.h"
diff --git a/sway/input/cursor.c b/sway/input/cursor.c
index 8a0d1df59..c0e142653 100644
--- a/sway/input/cursor.c
+++ b/sway/input/cursor.c
@@ -7,7 +7,7 @@
 #include <wlr/types/wlr_cursor.h>
 #include <wlr/types/wlr_xcursor_manager.h>
 #include "sway/input/cursor.h"
-#include "sway/view.h"
+#include "sway/tree/view.h"
 #include "list.h"
 #include "log.h"
 
diff --git a/sway/input/seat.c b/sway/input/seat.c
index 648e79143..56b397664 100644
--- a/sway/input/seat.c
+++ b/sway/input/seat.c
@@ -1,13 +1,13 @@
 #define _XOPEN_SOURCE 700
 #include <wlr/types/wlr_cursor.h>
 #include <wlr/types/wlr_xcursor_manager.h>
-#include "sway/container.h"
+#include "sway/tree/container.h"
 #include "sway/input/seat.h"
 #include "sway/input/cursor.h"
 #include "sway/input/input-manager.h"
 #include "sway/input/keyboard.h"
 #include "sway/output.h"
-#include "sway/view.h"
+#include "sway/tree/view.h"
 #include "log.h"
 
 static void seat_device_destroy(struct sway_seat_device *seat_device) {
diff --git a/sway/ipc-json.c b/sway/ipc-json.c
index 977f1ecbc..ebd5e43aa 100644
--- a/sway/ipc-json.c
+++ b/sway/ipc-json.c
@@ -3,7 +3,7 @@
 #include <ctype.h>
 #include "log.h"
 #include "sway/ipc-json.h"
-#include "sway/container.h"
+#include "sway/tree/container.h"
 #include "sway/output.h"
 #include "sway/input/input-manager.h"
 #include "sway/input/seat.h"
diff --git a/sway/main.c b/sway/main.c
index f2f24be35..31bf617b8 100644
--- a/sway/main.c
+++ b/sway/main.c
@@ -18,7 +18,7 @@
 #include <wlr/util/log.h>
 #include "sway/config.h"
 #include "sway/server.h"
-#include "sway/layout.h"
+#include "sway/tree/layout.h"
 #include "sway/ipc-server.h"
 #include "ipc-client.h"
 #include "readline.h"
diff --git a/sway/tree/container.c b/sway/tree/container.c
index bbafe9ec1..805d5644d 100644
--- a/sway/tree/container.c
+++ b/sway/tree/container.c
@@ -7,14 +7,14 @@
 #include <wlr/types/wlr_output_layout.h>
 #include <wlr/types/wlr_wl_shell.h>
 #include "sway/config.h"
-#include "sway/container.h"
+#include "sway/tree/container.h"
 #include "sway/input/input-manager.h"
 #include "sway/input/seat.h"
-#include "sway/layout.h"
+#include "sway/tree/layout.h"
 #include "sway/output.h"
 #include "sway/server.h"
-#include "sway/view.h"
-#include "sway/workspace.h"
+#include "sway/tree/view.h"
+#include "sway/tree/workspace.h"
 #include "sway/ipc-server.h"
 #include "log.h"
 
@@ -82,8 +82,6 @@ static swayc_t *new_swayc(enum swayc_types type) {
 	c->layout = L_NONE;
 	c->workspace_layout = L_NONE;
 	c->type = type;
-	c->nb_master = 1;
-	c->nb_slave_groups = 1;
 	if (type != C_VIEW) {
 		c->children = create_list();
 	}
diff --git a/sway/tree/layout.c b/sway/tree/layout.c
index de9e7b586..5a15f3a2e 100644
--- a/sway/tree/layout.c
+++ b/sway/tree/layout.c
@@ -6,10 +6,10 @@
 #include <string.h>
 #include <wlr/types/wlr_output.h>
 #include <wlr/types/wlr_output_layout.h>
-#include "sway/container.h"
-#include "sway/layout.h"
+#include "sway/tree/container.h"
+#include "sway/tree/layout.h"
 #include "sway/output.h"
-#include "sway/view.h"
+#include "sway/tree/view.h"
 #include "sway/input/seat.h"
 #include "list.h"
 #include "log.h"
diff --git a/sway/tree/view.c b/sway/tree/view.c
index 9499adca7..20e657a26 100644
--- a/sway/tree/view.c
+++ b/sway/tree/view.c
@@ -1,8 +1,8 @@
 #include <wayland-server.h>
 #include <wlr/types/wlr_output_layout.h>
-#include "sway/container.h"
-#include "sway/layout.h"
-#include "sway/view.h"
+#include "sway/tree/container.h"
+#include "sway/tree/layout.h"
+#include "sway/tree/view.h"
 
 const char *view_get_title(struct sway_view *view) {
 	if (view->iface.get_prop) {
@@ -45,6 +45,7 @@ void view_set_size(struct sway_view *view, int width, int height) {
 	}
 }
 
+// TODO make view coordinates
 void view_set_position(struct sway_view *view, double ox, double oy) {
 	if (view->iface.set_position) {
 		struct wlr_box box = {
diff --git a/sway/tree/workspace.c b/sway/tree/workspace.c
index 861fda4dd..3da3fde6a 100644
--- a/sway/tree/workspace.c
+++ b/sway/tree/workspace.c
@@ -3,10 +3,10 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <strings.h>
-#include "sway/container.h"
+#include "sway/tree/container.h"
 #include "sway/input/input-manager.h"
 #include "sway/input/seat.h"
-#include "sway/workspace.h"
+#include "sway/tree/workspace.h"
 #include "log.h"
 #include "util.h"