diff --git a/Makefile.am b/Makefile.am
index 24c9fcb..381fca1 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,9 +1,9 @@
 AUTOMAKE_OPTIONS = foreign subdir-objects -Wall
 bin_PROGRAMS = forge
-forge_SOURCES = src/main.c src/args.c src/forge.c src/file.c src/window.c src/shaders.c src/timer.c src/string.c src/config_file.c src/rand.c src/video.c src/shared.c src/midi.c src/state.c src/arr.c src/tempo.c $(top_srcdir)/include/glad/gl.h $(top_srcdir)/include/glad/egl.h $(top_srcdir)/hashmap.c/hashmap.c $(top_srcdir)/log.c/src/log.c
+forge_SOURCES = src/args.c src/arr.c src/config_file.c src/file.c src/forge.c src/main.c src/midi.c src/preo src/rand.c src/shaders.c src/shared.c src/state.c src/string.c src/tempo.c src/timer.c src/video.c src/window.c $(top_srcdir)/include/glad/gl.h $(top_srcdir)/include/glad/egl.h $(top_srcdir)/hashmap.c/hashmap.c $(top_srcdir)/log.c/src/log.c
 forge_CFLAGS = -Ofast -march=native -flto -funroll-loops -fprefetch-loop-arrays -fno-exceptions -fopenmp -I$(top_srcdir)/include -DGLFW_INCLUDE_NONE -DGLFW_EXPOSE_NATIVE_EGL -DGLFW_NATIVE_INCLUDE_NONE -DLOG_USE_COLOR -DDATADIR=\"$(datadir)/$(PACKAGE)\"
 forge_LDADD = -lm -lGL -lglfw -lasound
-include_HEADERS = src/main.h src/args.h src/config.h src/types.h src/forge.h src/file.h src/constants.h src/window.h src/shaders.h src/timer.h src/string.h src/config_file.h src/rand.h src/video.h src/shared.h src/midi.h src/state.h src/arr.h src/tempo.h $(top_srcdir)/include/glad/gl.h $(top_srcdir)/include/glad/egl.h $(top_srcdir)/include/linmath.h $(top_srcdir)/include/hashmap.h $(top_srcdir)/include/log.h
+include_HEADERS = src/args.h src/arr.h src/config.h src/config_file.h src/constants.h src/file.h src/forge.h src/main.h src/midi.h src/project.h src/rand.h src/shaders.h src/shared.h src/state.h src/string.h src/tempo.h src/timer.h src/types.h src/video.h src/window.h $(top_srcdir)/include/glad/gl.h $(top_srcdir)/include/glad/egl.h $(top_srcdir)/include/linmath.h $(top_srcdir)/include/hashmap.h $(top_srcdir)/include/log.h
 
 EXTRA_DIST = default/forge_project.cfg default/frag0.glsl default/frag1.glsl default/frag2.glsl default/frag3.glsl default/frag4.glsl default/frag5.glsl default/frag6.glsl default/frag7.glsl default/frag8.glsl default/frag9.glsl default/frag10.glsl
 confdir = $(prefix)/share/$(PACKAGE)
diff --git a/src/forge.c b/src/forge.c
index cee82a0..ba751af 100644
--- a/src/forge.c
+++ b/src/forge.c
@@ -13,6 +13,7 @@
 #include "file.h"
 #include "forge.h"
 #include "midi.h"
+#include "project.h"
 #include "shaders.h"
 #include "shared.h"
 #include "state.h"
@@ -26,13 +27,10 @@ static ShaderProgram program;
 static Window *window_output;
 static Window *window_monitor;
 static VideoCaptureArray inputs;
-static FileArray fragment_shaders;
-static File common_shader_code;
 static Timer timer;
-static ConfigFile config;
 static MidiDevice midi;
-static StateConfig state_config;
 static bool trace_midi;
+static Project project;
 
 static void compute_fps(bool trace_fps) {
   double fps;
@@ -62,7 +60,7 @@ static void compute_fps(bool trace_fps) {
 static void init_context(Parameters params, unsigned int in_count) {
   unsigned int i;
 
-  state_init(context, state_config, params.demo, params.auto_random,
+  state_init(context, project.state_config, params.demo, params.auto_random,
              params.base_tempo, params.state_file, params.load_state);
 
   context->monitor = params.monitor;
@@ -82,67 +80,8 @@ static void init_context(Parameters params, unsigned int in_count) {
 
 static void free_context() { shared_close_context(context); }
 
-static void hot_reload() {
-  unsigned int i;
-  bool force_update;
-
-  force_update = false;
-
-  if (file_should_update(common_shader_code)) {
-    file_update(&common_shader_code);
-    force_update = true;
-  }
-
-  for (i = 0; i < program.frag_count; i++) {
-    if (force_update || file_should_update(fragment_shaders.values[i])) {
-      file_update(&fragment_shaders.values[i]);
-      file_prepend(&fragment_shaders.values[i], common_shader_code);
-
-      shaders_update(program, fragment_shaders, i);
-    }
-  }
-}
-
-File read_fragment_shader_file(char *frag_path, char *frag_prefix,
-                               unsigned int i) {
-  File fragment_shader;
-  char file_path[STR_LEN];
-
-  snprintf(file_path, STR_LEN, "%s/%s%d.glsl", frag_path, frag_prefix, i);
-  fragment_shader = file_read(file_path);
-  if (fragment_shader.error) {
-    exit(EXIT_FAILURE);
-  }
-
-  return fragment_shader;
-}
-
-static void init_files(char *frag_path, char *frag_prefix,
-                       unsigned int frag_count) {
-  unsigned int i;
-
-  fragment_shaders.length = frag_count;
-
-  for (i = 0; i < frag_count + 1; i++) {
-    if (i == 0) {
-      common_shader_code = read_fragment_shader_file(frag_path, frag_prefix, i);
-    } else {
-      fragment_shaders.values[i - 1] =
-          read_fragment_shader_file(frag_path, frag_prefix, i);
-
-      file_prepend(&fragment_shaders.values[i - 1], common_shader_code);
-    }
-  }
-}
-
-static void free_files(unsigned int frag_count) {
-  unsigned int i;
-
-  for (i = 0; i < frag_count; i++) {
-    file_free(&fragment_shaders.values[i]);
-  }
-
-  file_free(&common_shader_code);
+static void reload_shader(unsigned int i) {
+  shaders_update(program, project.fragment_shaders, i);
 }
 
 static void init_inputs(StringArray video_in, unsigned int video_size) {
@@ -195,7 +134,7 @@ static void key_callback(Window *window, int key,
   } else if (window_char_key(key, action, 82)) {
     // R: randomize
     log_info("[R] Randomizing...");
-    state_randomize(context, state_config);
+    state_randomize(context, project.state_config);
   } else if (window_char_key(key, action, 68)) {
     // D: demo on/off
     log_info((context->demo ? "[D] Demo OFF" : "[D] Demo ON"));
@@ -209,12 +148,13 @@ static void key_callback(Window *window, int key,
 }
 
 static void midi_callback(unsigned char code, unsigned char value) {
-  state_apply_event(context, state_config, midi, code, value, trace_midi);
+  state_apply_event(context, project.state_config, midi, code, value,
+                    trace_midi);
 }
 
 static void loop(bool hr, bool trace_fps) {
   if (hr) {
-    hot_reload();
+    project_reload(&project, reload_shader);
   }
 
   compute_fps(trace_fps);
@@ -242,35 +182,21 @@ static void loop(bool hr, bool trace_fps) {
 }
 
 void forge_run(Parameters params) {
-  unsigned int frag_count, in_count;
-  char config_path[STR_LEN * 2 + 1];
-  char *frag_prefix;
-
   context = shared_init_context("/" PACKAGE "_context");
 
   context->stop = false;
 
-  sprintf(config_path, "%s/%s", params.project_path, params.config_file);
-
-  config = config_file_read(config_path);
-
-  state_config = state_parse_config(config);
-
-  frag_count = config_file_get_int(config, "FRAG_COUNT", 1);
-  in_count = config_file_get_int(config, "IN_COUNT", 0);
-  frag_prefix = config_file_get_str(config, "FRAG_FILE_PREFIX", "frag");
-
-  init_files(params.project_path, frag_prefix, frag_count);
+  project = project_init(params.project_path, params.config_file);
 
   init_inputs(params.video_in, params.video_size);
 
-  init_context(params, in_count);
+  init_context(params, project.in_count);
 
   if (!start_video_captures(params.video_in.length, params.trace_fps)) {
     return;
   }
 
-  midi = midi_open(config_file_get_str(config, "MIDI_HW", "hw"));
+  midi = midi_open(config_file_get_str(project.config, "MIDI_HW", "hw"));
 
   if (midi.error) {
     params.demo = true;
@@ -282,7 +208,7 @@ void forge_run(Parameters params) {
     }
   }
 
-  if (!state_background_write(context, state_config, midi)) {
+  if (!state_background_write(context, project.state_config, midi)) {
     return;
   }
 
@@ -296,8 +222,7 @@ void forge_run(Parameters params) {
 
     window_use(window_output, context);
 
-    program = shaders_init(fragment_shaders, config, context, inputs,
-                           state_config, NULL);
+    program = shaders_init(project, context, inputs, NULL);
   } else {
     window_output = NULL;
   }
@@ -309,9 +234,8 @@ void forge_run(Parameters params) {
 
     window_use(window_monitor, context);
 
-    program =
-        shaders_init(fragment_shaders, config, context, inputs, state_config,
-                     window_output != NULL ? &program : NULL);
+    program = shaders_init(project, context, inputs,
+                           window_output != NULL ? &program : NULL);
   } else {
     window_monitor = NULL;
   }
@@ -334,7 +258,7 @@ void forge_run(Parameters params) {
   context->stop = true;
 
   if (params.save_state) {
-    state_save(context, state_config, params.state_file);
+    state_save(context, project.state_config, params.state_file);
   }
 
   shaders_free(program);
@@ -355,9 +279,7 @@ void forge_run(Parameters params) {
 
   free_context();
 
-  free_files(frag_count);
-
-  config_file_free(config);
+  project_free(project);
 
   window_terminate();
 }
\ No newline at end of file
diff --git a/src/project.c b/src/project.c
new file mode 100644
index 0000000..ec1b5e5
--- /dev/null
+++ b/src/project.c
@@ -0,0 +1,95 @@
+#include "types.h"
+
+#include "config_file.h"
+#include "file.h"
+#include "project.h"
+#include "state.h"
+
+static File read_fragment_shader_file(char *frag_path, char *frag_prefix,
+                                      unsigned int i) {
+  File fragment_shader;
+  char file_path[STR_LEN];
+
+  snprintf(file_path, STR_LEN, "%s/%s%d.glsl", frag_path, frag_prefix, i);
+  fragment_shader = file_read(file_path);
+  if (fragment_shader.error) {
+    exit(EXIT_FAILURE);
+  }
+
+  return fragment_shader;
+}
+
+static void init_files(Project *output, char *frag_path, char *frag_prefix,
+                       unsigned int frag_count) {
+  unsigned int i;
+
+  output->fragment_shaders.length = frag_count;
+
+  for (i = 0; i < frag_count + 1; i++) {
+    if (i == 0) {
+      output->common_shader_code =
+          read_fragment_shader_file(frag_path, frag_prefix, i);
+    } else {
+      output->fragment_shaders.values[i - 1] =
+          read_fragment_shader_file(frag_path, frag_prefix, i);
+
+      file_prepend(&output->fragment_shaders.values[i - 1],
+                   output->common_shader_code);
+    }
+  }
+}
+
+Project project_init(char *project_path, char *config_file) {
+  Project project;
+  char config_path[STR_LEN];
+  char *frag_prefix;
+
+  snprintf(config_path, STR_LEN, "%s/%s", project_path, config_file);
+
+  project.config = config_file_read(config_path);
+
+  project.state_config = state_parse_config(project.config);
+
+  project.frag_count = config_file_get_int(project.config, "FRAG_COUNT", 1);
+  project.in_count = config_file_get_int(project.config, "IN_COUNT", 0);
+  frag_prefix = config_file_get_str(project.config, "FRAG_FILE_PREFIX", "frag");
+
+  init_files(&project, project_path, frag_prefix, project.frag_count);
+
+  return project;
+}
+
+void project_reload(Project *project, void (*reload_callback)(unsigned int)) {
+  unsigned int i;
+  bool force_update;
+
+  force_update = false;
+
+  if (file_should_update(project->common_shader_code)) {
+    file_update(&project->common_shader_code);
+    force_update = true;
+  }
+
+  for (i = 0; i < project->frag_count; i++) {
+    if (force_update ||
+        file_should_update(project->fragment_shaders.values[i])) {
+      file_update(&project->fragment_shaders.values[i]);
+      file_prepend(&project->fragment_shaders.values[i],
+                   project->common_shader_code);
+
+      reload_callback(i);
+    }
+  }
+}
+
+void project_free(Project project) {
+  unsigned int i;
+
+  for (i = 0; i < project.frag_count; i++) {
+    file_free(&project.fragment_shaders.values[i]);
+  }
+
+  file_free(&project.common_shader_code);
+
+  config_file_free(project.config);
+}
\ No newline at end of file
diff --git a/src/project.h b/src/project.h
new file mode 100644
index 0000000..cd295ef
--- /dev/null
+++ b/src/project.h
@@ -0,0 +1,12 @@
+#include "types.h"
+
+#ifndef PROJECT_H
+#define PROJECT_H
+
+Project project_init(char *project_path, char *config_file);
+
+void project_reload(Project *project, void (*reload_callback)(unsigned int));
+
+void project_free(Project project);
+
+#endif /* PROJECT_H */
\ No newline at end of file
diff --git a/src/shaders.c b/src/shaders.c
index 4db4a89..4bafe3c 100644
--- a/src/shaders.c
+++ b/src/shaders.c
@@ -377,25 +377,25 @@ static void init_programs(ShaderProgram *program, ConfigFile config,
   }
 }
 
-ShaderProgram shaders_init(FileArray fragment_shaders, ConfigFile config,
-                           SharedContext *context, VideoCaptureArray inputs,
-                           StateConfig state_config, ShaderProgram *previous) {
+ShaderProgram shaders_init(Project project, SharedContext *context,
+                           VideoCaptureArray inputs, ShaderProgram *previous) {
   ShaderProgram program;
 
   if (previous == NULL) {
     program.error = false;
     program.last_resolution[0] = context->resolution[0];
     program.last_resolution[1] = context->resolution[1];
-    program.tex_count = config_file_get_int(config, "TEX_COUNT", 9);
-    program.frag_count = config_file_get_int(config, "FRAG_COUNT", 10);
+    program.tex_count = config_file_get_int(project.config, "TEX_COUNT", 9);
+    program.frag_count = project.frag_count;
     program.frag_output_index =
-        config_file_get_int(config, "FRAG_OUTPUT", 1) - 1;
+        config_file_get_int(project.config, "FRAG_OUTPUT", 1) - 1;
     program.frag_monitor_index =
-        config_file_get_int(config, "FRAG_MONITOR", 1) - 1;
-    program.sub_type_count = config_file_get_int(config, "SUB_TYPE_COUNT", 0);
-    program.in_count = config_file_get_int(config, "IN_COUNT", 0);
-    program.sub_variant_count = state_config.state_max;
-    program.active_count = state_config.midi_active_counts.length;
+        config_file_get_int(project.config, "FRAG_MONITOR", 1) - 1;
+    program.sub_type_count =
+        config_file_get_int(project.config, "SUB_TYPE_COUNT", 0);
+    program.in_count = config_file_get_int(project.config, "IN_COUNT", 0);
+    program.sub_variant_count = project.state_config.state_max;
+    program.active_count = project.state_config.midi_active_counts.length;
     program.midi_lengths.length = 0;
 
     if (program.frag_count > MAX_FRAG) {
@@ -406,7 +406,7 @@ ShaderProgram shaders_init(FileArray fragment_shaders, ConfigFile config,
 
     init_gl(&program);
 
-    init_shaders(&program, fragment_shaders);
+    init_shaders(&program, project.fragment_shaders);
 
     if (program.error) {
       return program;
@@ -414,11 +414,11 @@ ShaderProgram shaders_init(FileArray fragment_shaders, ConfigFile config,
 
     init_textures(&program, context);
 
-    init_input(&program, config, inputs);
+    init_input(&program, project.config, inputs);
 
-    init_framebuffers(&program, config);
+    init_framebuffers(&program, project.config);
 
-    init_programs(&program, config, state_config);
+    init_programs(&program, project.config, project.state_config);
 
     init_vertices(&program);
 
diff --git a/src/shaders.h b/src/shaders.h
index 9ac969b..ad45181 100644
--- a/src/shaders.h
+++ b/src/shaders.h
@@ -3,9 +3,8 @@
 #ifndef SHADERS_H
 #define SHADERS_H
 
-ShaderProgram shaders_init(FileArray fragment_shaders, ConfigFile config,
-                           SharedContext *context, VideoCaptureArray inputs,
-                           StateConfig state_config, ShaderProgram *previous);
+ShaderProgram shaders_init(Project project, SharedContext *context,
+                           VideoCaptureArray inputs, ShaderProgram *previous);
 
 void shaders_update(ShaderProgram program, FileArray fragment_shaders,
                     unsigned int i);
diff --git a/src/types.h b/src/types.h
index bf7eb48..991dc30 100644
--- a/src/types.h
+++ b/src/types.h
@@ -29,6 +29,8 @@ typedef struct StringArray {
   unsigned int length;
 } StringArray;
 
+// args.c
+
 typedef struct Parameters {
   char project_path[STR_LEN];
   char config_file[STR_LEN];
@@ -51,9 +53,7 @@ typedef struct Parameters {
   bool trace_fps;
 } Parameters;
 
-typedef struct Vertex {
-  vec2 pos;
-} Vertex;
+// file.c
 
 typedef struct File {
   char path[STR_LEN];
@@ -65,6 +65,12 @@ typedef struct File {
 
 typedef ARRAY(FileArray, File);
 
+// shaders.c
+
+typedef struct Vertex {
+  vec2 pos;
+} Vertex;
+
 typedef struct ShaderProgram {
   bool error;
 
@@ -121,6 +127,8 @@ typedef struct ShaderProgram {
   EGLDisplay egl_display;
 } ShaderProgram;
 
+// video.c
+
 typedef struct VideoCapture {
   char name[STR_LEN];
   bool error;
@@ -137,8 +145,12 @@ typedef struct VideoCapture {
 
 typedef ARRAY(VideoCaptureArray, VideoCapture);
 
+// window.c
+
 typedef GLFWwindow Window;
 
+// tempo.c
+
 typedef struct Tempo {
   long last_reset;
   long last_tap;
@@ -150,6 +162,8 @@ typedef struct Tempo {
   float tempo;
 } Tempo;
 
+// context.c
+
 typedef struct SharedContext {
   int fd;
 
@@ -176,6 +190,8 @@ typedef struct SharedContext {
   bool stop;
 } SharedContext;
 
+// state.c
+
 typedef struct StateConfig {
   unsigned int state_max;
 
@@ -194,12 +210,16 @@ typedef struct StateConfig {
   unsigned int tap_tempo_code;
 } StateConfig;
 
+// timer.c
+
 typedef struct Timer {
   struct timeval start;
   unsigned int counter;
   unsigned int target;
 } Timer;
 
+// config.c
+
 typedef struct ConfigFile {
   struct hashmap *map;
 } ConfigFile;
@@ -209,6 +229,8 @@ typedef struct ConfigFileItem {
   char value[STR_LEN];
 } ConfigFileItem;
 
+// midi.c
+
 typedef struct MidiDevice {
   bool error;
   char name[STR_LEN];
@@ -216,4 +238,16 @@ typedef struct MidiDevice {
   snd_rawmidi_t *output;
 } MidiDevice;
 
+// project.c
+
+typedef struct Project {
+  bool error;
+  ConfigFile config;
+  StateConfig state_config;
+  FileArray fragment_shaders;
+  File common_shader_code; // TODO change
+  unsigned int frag_count;
+  unsigned int in_count;
+} Project;
+
 #endif /* TYPES_H */
\ No newline at end of file