diff --git a/src/config/config.c b/src/config/config.c
new file mode 100644
index 00000000..e374ac97
--- /dev/null
+++ b/src/config/config.c
@@ -0,0 +1,62 @@
+// Copyright (c) Epic Games Tools
+// Licensed under the MIT license (https://opensource.org/license/mit/)
+
+////////////////////////////////
+//~ rjf: ID Functions
+
+internal void cfg_id_list_push(Arena *arena, CFG_IDList *list, CFG_ID id);
+internal CFG_IDList cfg_id_list_copy(Arena *arena, CFG_IDList *src);
+
+////////////////////////////////
+//~ rjf: Node Pointer Data Structure Functions
+
+internal void cfg_node_ptr_list_push(Arena *arena, CFG_NodePtrList *list, CFG_Node *node);
+internal void cfg_node_ptr_list_push_front(Arena *arena, CFG_NodePtrList *list, CFG_Node *node);
+#define cfg_node_ptr_list_first(list) ((list)->count ? (list)->first->v : &cfg_nil_node)
+#define cfg_node_ptr_list_last(list)  ((list)->count ? (list)->last->v  : &cfg_nil_node)
+internal CFG_NodePtrArray cfg_node_ptr_array_from_list(Arena *arena, CFG_NodePtrList *list);
+
+////////////////////////////////
+//~ rjf: Config Reading Functions
+
+//- rjf: context selection
+internal void cfg_ctx_select(CFG_Ctx *ctx);
+
+//- rjf: tree navigations
+internal CFG_Node *cfg_node_from_id(CFG_ID id);
+internal CFG_Node *cfg_node_child_from_string(CFG_Node *parent, String8 string);
+internal CFG_Node *cfg_node_child_from_string_or_parent(CFG_Node *parent, String8 string);
+internal CFG_NodePtrList cfg_node_child_list_from_string(Arena *arena, CFG_Node *parent, String8 string);
+internal CFG_NodePtrList cfg_node_top_level_list_from_string(Arena *arena, String8 string);
+internal CFG_NodeRec cfg_node_rec__depth_first(CFG_Node *root, CFG_Node *node);
+
+//- rjf: serialization
+internal String8 cfg_string_from_tree(Arena *arena, String8 root_path, CFG_Node *root);
+
+////////////////////////////////
+//~ rjf: Config Writing Functions
+
+//- rjf: state creation / destroying
+internal CFG_State *cfg_state_alloc(void);
+internal void cfg_state_release(CFG_State *state);
+
+//- rjf: state -> ctx
+internal CFG_Ctx *cfg_state_ctx(CFG_State *state);
+
+//- rjf: tree building
+internal CFG_Node *cfg_node_alloc(CFG_State *state);
+internal void cfg_node_release(CFG_State *state, CFG_Node *node);
+internal void cfg_node_release_all_children(CFG_State *state, CFG_Node *node);
+internal CFG_Node *cfg_node_new(CFG_State *state, CFG_Node *parent, String8 string);
+internal CFG_Node *cfg_node_newf(CFG_State *state, CFG_Node *parent, char *fmt, ...);
+internal CFG_Node *cfg_node_new_replace(CFG_State *state, CFG_Node *parent, String8 string);
+internal CFG_Node *cfg_node_new_replacef(CFG_State *state, CFG_Node *parent, char *fmt, ...);
+internal CFG_Node *cfg_node_deep_copy(CFG_State *state, CFG_Node *src_root);
+internal void cfg_node_equip_string(CFG_State *state, CFG_Node *node, String8 string);
+internal void cfg_node_equip_stringf(CFG_State *state, CFG_Node *node, char *fmt, ...);
+internal void cfg_node_insert_child(CFG_State *state, CFG_Node *parent, CFG_Node *prev_child, CFG_Node *new_child);
+internal void cfg_node_unhook(CFG_State *state, CFG_Node *parent, CFG_Node *child);
+internal CFG_Node *cfg_node_child_from_string_or_alloc(CFG_State *state, CFG_Node *parent, String8 string);
+
+//- rjf: deserialization
+internal CFG_NodePtrList cfg_node_ptr_list_from_string(Arena *arena, String8 root_path, String8 string);
diff --git a/src/config/config.h b/src/config/config.h
new file mode 100644
index 00000000..e0b12ed0
--- /dev/null
+++ b/src/config/config.h
@@ -0,0 +1,178 @@
+// Copyright (c) Epic Games Tools
+// Licensed under the MIT license (https://opensource.org/license/mit/)
+
+#ifndef CONFIG_H
+#define CONFIG_H
+
+////////////////////////////////
+//~ rjf: IDs
+
+typedef U64 CFG_ID;
+
+typedef struct CFG_IDNode CFG_IDNode;
+struct CFG_IDNode
+{
+  CFG_IDNode *next;
+  CFG_ID v;
+};
+
+typedef struct CFG_IDList CFG_IDList;
+struct CFG_IDList
+{
+  CFG_IDNode *first;
+  CFG_IDNode *last;
+  U64 count;
+};
+
+////////////////////////////////
+//~ rjf: Tree Types
+
+typedef struct CFG_Node CFG_Node;
+struct CFG_Node
+{
+  CFG_Node *first;
+  CFG_Node *last;
+  CFG_Node *next;
+  CFG_Node *prev;
+  CFG_Node *parent;
+  CFG_ID id;
+  String8 string;
+};
+
+typedef struct CFG_NodePtrNode CFG_NodePtrNode;
+struct CFG_NodePtrNode
+{
+  CFG_NodePtrNode *next;
+  CFG_NodePtrNode *prev;
+  CFG_Node *v;
+};
+
+typedef struct CFG_NodePtrSlot CFG_NodePtrSlot;
+struct CFG_NodePtrSlot
+{
+  CFG_NodePtrNode *first;
+  CFG_NodePtrNode *last;
+};
+
+typedef struct CFG_NodePtrList CFG_NodePtrList;
+struct CFG_NodePtrList
+{
+  CFG_NodePtrNode *first;
+  CFG_NodePtrNode *last;
+  U64 count;
+};
+
+typedef struct CFG_NodePtrArray CFG_NodePtrArray;
+struct CFG_NodePtrArray
+{
+  CFG_Node **v;
+  U64 count;
+};
+
+typedef struct CFG_NodeRec CFG_NodeRec;
+struct CFG_NodeRec
+{
+  CFG_Node *next;
+  S32 push_count;
+  S32 pop_count;
+};
+
+////////////////////////////////
+//~ rjf: Config State Bundles
+
+typedef struct CFG_Ctx CFG_Ctx;
+struct CFG_Ctx
+{
+  CFG_Node *root;
+  U64 id_slots_count;
+  CFG_NodePtrSlot *id_slots;
+  U64 change_gen;
+  CFG_ID last_accessed_id;
+  CFG_Node *last_accessed;
+};
+
+typedef struct CFG_State CFG_State;
+struct CFG_State
+{
+  Arena *arena;
+  CFG_Node *free;
+  CFG_NodePtrNode *free_id_node;
+  U64 id_gen;
+  CFG_Ctx ctx;
+};
+
+////////////////////////////////
+//~ rjf: Globals
+
+read_only global CFG_Node cfg_nil_node =
+{
+  &cfg_nil_node,
+  &cfg_nil_node,
+  &cfg_nil_node,
+  &cfg_nil_node,
+  &cfg_nil_node,
+};
+
+thread_static CFG_Ctx *cfg_ctx = 0;
+
+////////////////////////////////
+//~ rjf: ID Functions
+
+internal void cfg_id_list_push(Arena *arena, CFG_IDList *list, CFG_ID id);
+internal CFG_IDList cfg_id_list_copy(Arena *arena, CFG_IDList *src);
+
+////////////////////////////////
+//~ rjf: Node Pointer Data Structure Functions
+
+internal void cfg_node_ptr_list_push(Arena *arena, CFG_NodePtrList *list, CFG_Node *node);
+internal void cfg_node_ptr_list_push_front(Arena *arena, CFG_NodePtrList *list, CFG_Node *node);
+#define cfg_node_ptr_list_first(list) ((list)->count ? (list)->first->v : &cfg_nil_node)
+#define cfg_node_ptr_list_last(list)  ((list)->count ? (list)->last->v  : &cfg_nil_node)
+internal CFG_NodePtrArray cfg_node_ptr_array_from_list(Arena *arena, CFG_NodePtrList *list);
+
+////////////////////////////////
+//~ rjf: Config Reading Functions
+
+//- rjf: context selection
+internal void cfg_ctx_select(CFG_Ctx *ctx);
+
+//- rjf: tree navigations
+internal CFG_Node *cfg_node_from_id(CFG_ID id);
+internal CFG_Node *cfg_node_child_from_string(CFG_Node *parent, String8 string);
+internal CFG_Node *cfg_node_child_from_string_or_parent(CFG_Node *parent, String8 string);
+internal CFG_NodePtrList cfg_node_child_list_from_string(Arena *arena, CFG_Node *parent, String8 string);
+internal CFG_NodePtrList cfg_node_top_level_list_from_string(Arena *arena, String8 string);
+internal CFG_NodeRec cfg_node_rec__depth_first(CFG_Node *root, CFG_Node *node);
+
+//- rjf: serialization
+internal String8 cfg_string_from_tree(Arena *arena, String8 root_path, CFG_Node *root);
+
+////////////////////////////////
+//~ rjf: Config Writing Functions
+
+//- rjf: state creation / destroying
+internal CFG_State *cfg_state_alloc(void);
+internal void cfg_state_release(CFG_State *state);
+
+//- rjf: state -> ctx
+internal CFG_Ctx *cfg_state_ctx(CFG_State *state);
+
+//- rjf: tree building
+internal CFG_Node *cfg_node_alloc(CFG_State *state);
+internal void cfg_node_release(CFG_State *state, CFG_Node *node);
+internal void cfg_node_release_all_children(CFG_State *state, CFG_Node *node);
+internal CFG_Node *cfg_node_new(CFG_State *state, CFG_Node *parent, String8 string);
+internal CFG_Node *cfg_node_newf(CFG_State *state, CFG_Node *parent, char *fmt, ...);
+internal CFG_Node *cfg_node_new_replace(CFG_State *state, CFG_Node *parent, String8 string);
+internal CFG_Node *cfg_node_new_replacef(CFG_State *state, CFG_Node *parent, char *fmt, ...);
+internal CFG_Node *cfg_node_deep_copy(CFG_State *state, CFG_Node *src_root);
+internal void cfg_node_equip_string(CFG_State *state, CFG_Node *node, String8 string);
+internal void cfg_node_equip_stringf(CFG_State *state, CFG_Node *node, char *fmt, ...);
+internal void cfg_node_insert_child(CFG_State *state, CFG_Node *parent, CFG_Node *prev_child, CFG_Node *new_child);
+internal void cfg_node_unhook(CFG_State *state, CFG_Node *parent, CFG_Node *child);
+internal CFG_Node *cfg_node_child_from_string_or_alloc(CFG_State *state, CFG_Node *parent, String8 string);
+
+//- rjf: deserialization
+internal CFG_NodePtrList cfg_node_ptr_list_from_string(Arena *arena, String8 root_path, String8 string);
+
+#endif // CONFIG_H
diff --git a/src/dbg_info/dbg_info.c b/src/dbg_info/dbg_info.c
index aaa6f86f..35130803 100644
--- a/src/dbg_info/dbg_info.c
+++ b/src/dbg_info/dbg_info.c
@@ -553,8 +553,8 @@ di_async_tick(void)
     ////////////////////////////
     //- rjf: pop all requests, high priority first
     //
-    DI_RequestNode *first_req = 0;
-    DI_RequestNode *last_req = 0;
+    DI_RequestNode *first_req[2] = {0};
+    DI_RequestNode *last_req[2] = {0};
     for EachElement(idx, di_shared->req_batches)
     {
       DI_RequestBatch *b = &di_shared->req_batches[idx];
@@ -564,7 +564,7 @@ di_async_tick(void)
         {
           DI_RequestNode *n_copy = push_array(scratch.arena, DI_RequestNode, 1);
           MemoryCopyStruct(&n_copy->v, &n->v);
-          SLLQueuePush(first_req, last_req, n_copy);
+          SLLQueuePush(first_req[idx], last_req[idx], n_copy);
         }
         arena_clear(b->arena);
         b->first = b->last = 0;
@@ -591,261 +591,271 @@ di_async_tick(void)
     
     ////////////////////////////
     //- rjf: generate load tasks for all unique requests
-    //
-    for EachNode(n, DI_RequestNode, first_req)
-    {
-      // rjf: unpack request
-      DI_Key key = n->v.key;
-      
-      // rjf: determine if this request is a duplicate
-      B32 request_is_duplicate = 1;
+    //
+    for EachElement(priority_idx, first_req)
+    {
+      for EachNode(n, DI_RequestNode, first_req[priority_idx])
       {
-        U64 hash = u64_hash_from_str8(str8_struct(&key));
-        U64 slot_idx = hash%di_shared->slots_count;
-        DI_Slot *slot = &di_shared->slots[slot_idx];
-        Stripe *stripe = stripe_from_slot_idx(&di_shared->stripes, slot_idx);
-        RWMutexScope(stripe->rw_mutex, 0)
+        // rjf: unpack request
+        DI_Key key = n->v.key;
+        
+        // rjf: determine if this request is a duplicate
+        B32 request_is_duplicate = 1;
         {
-          for(DI_Node *n = slot->first; n != 0; n = n->next)
+          U64 hash = u64_hash_from_str8(str8_struct(&key));
+          U64 slot_idx = hash%di_shared->slots_count;
+          DI_Slot *slot = &di_shared->slots[slot_idx];
+          Stripe *stripe = stripe_from_slot_idx(&di_shared->stripes, slot_idx);
+          RWMutexScope(stripe->rw_mutex, 0)
           {
-            if(di_key_match(n->key, key) && ins_atomic_u64_eval(&n->completion_count) == 0)
+            for(DI_Node *n = slot->first; n != 0; n = n->next)
             {
-              request_is_duplicate = (ins_atomic_u64_eval_cond_assign(&n->working_count, 1, 0) != 0);
-              break;
+              if(di_key_match(n->key, key) && ins_atomic_u64_eval(&n->completion_count) == 0)
+              {
+                request_is_duplicate = (ins_atomic_u64_eval_cond_assign(&n->working_count, 1, 0) != 0);
+                break;
+              }
             }
           }
         }
-      }
-      
-      // rjf: if not a duplicate, create new task
-      if(!request_is_duplicate)
-      {
-        DI_LoadTask *t = di_shared->free_load_task;
-        if(t)
+        
+        // rjf: if not a duplicate, create new task
+        if(!request_is_duplicate)
         {
-          SLLStackPop(di_shared->free_load_task);
+          DI_LoadTask *t = di_shared->free_load_task;
+          if(t)
+          {
+            SLLStackPop(di_shared->free_load_task);
+          }
+          else
+          {
+            t = push_array_no_zero(di_shared->arena, DI_LoadTask, 1);
+          }
+          MemoryZeroStruct(t);
+          DLLPushBack(di_shared->first_load_task[priority_idx], di_shared->last_load_task[priority_idx], t);
+          t->key = key;
         }
-        else
-        {
-          t = push_array_no_zero(di_shared->arena, DI_LoadTask, 1);
-        }
-        MemoryZeroStruct(t);
-        DLLPushBack(di_shared->first_load_task, di_shared->last_load_task, t);
-        t->key = key;
-      }
-    }
+      }
+    }
     
     ////////////////////////////
     //- rjf: update tasks: configure, launch if we can, & retire if we can
-    //
-    for(DI_LoadTask *t = di_shared->first_load_task, *next = 0; t != 0; t = next)
-    {
-      next = t->next;
-      
-      //- rjf: unpack key
-      DI_Key key = t->key;
-      U64 key_hash = u64_hash_from_str8(str8_struct(&key));
-      U64 key_slot_idx = key_hash%di_shared->key2path_slots_count;
-      DI_KeySlot *key_slot = &di_shared->key2path_slots[key_slot_idx];
-      Stripe *key_stripe = stripe_from_slot_idx(&di_shared->key2path_stripes, key_slot_idx);
-      
-      //- rjf: get key's O.G. path
-      String8 og_path = {0};
-      U64 og_min_timestamp = 0;
-      RWMutexScope(key_stripe->rw_mutex, 0)
+    //
+    for EachElement(priority_idx, di_shared->first_load_task)
+    {
+      for(DI_LoadTask *t = di_shared->first_load_task[priority_idx], *next = 0; t != 0; t = next)
       {
-        for(DI_KeyPathNode *n = key_slot->first; n != 0; n = n->next)
+        next = t->next;
+        
+        //- rjf: unpack key
+        DI_Key key = t->key;
+        U64 key_hash = u64_hash_from_str8(str8_struct(&key));
+        U64 key_slot_idx = key_hash%di_shared->key2path_slots_count;
+        DI_KeySlot *key_slot = &di_shared->key2path_slots[key_slot_idx];
+        Stripe *key_stripe = stripe_from_slot_idx(&di_shared->key2path_stripes, key_slot_idx);
+        
+        //- rjf: get key's O.G. path
+        String8 og_path = {0};
+        U64 og_min_timestamp = 0;
+        RWMutexScope(key_stripe->rw_mutex, 0)
         {
-          if(di_key_match(n->key, key))
+          for(DI_KeyPathNode *n = key_slot->first; n != 0; n = n->next)
           {
-            og_path = str8_copy(scratch.arena, n->path);
-            og_min_timestamp = n->min_timestamp;
-            break;
-          }
-        }
-      }
-      
-      //- rjf: analyze O.G. debug info
-      if(!t->og_analyzed)
-      {
-        t->og_analyzed = 1;
-        OS_Handle file = os_file_open(OS_AccessFlag_ShareRead|OS_AccessFlag_Read, og_path);
-        FileProperties props = os_properties_from_file(file);
-        t->og_size = props.size;
-        U64 rdi_magic_maybe = 0;
-        if(os_file_read_struct(file, 0, &rdi_magic_maybe) == 8 &&
-           rdi_magic_maybe == RDI_MAGIC_CONSTANT)
-        {
-          t->og_is_rdi = 1;
-        }
-        os_file_close(file);
-      }
-      U64 og_size = t->og_size;
-      B32 og_is_rdi = t->og_is_rdi;
-      
-      //- rjf: compute key's RDI path
-      String8 rdi_path = {0};
-      {
-        if(og_is_rdi)
-        {
-          rdi_path = og_path;
-        }
-        else
-        {
-          rdi_path = str8f(scratch.arena, "%S.rdi", str8_chop_last_dot(og_path));
-        }
-      }
-      
-      //- rjf: determine if RDI is stale
-      if(!t->rdi_analyzed)
-      {
-        t->rdi_analyzed = 1;
-        OS_Handle file = os_file_open(OS_AccessFlag_ShareRead|OS_AccessFlag_Read, rdi_path);
-        FileProperties props = os_properties_from_file(file);
-        if(props.modified < og_min_timestamp)
-        {
-          t->rdi_is_stale = 1;
-        }
-        else
-        {
-          t->rdi_is_stale = 1;
-          RDI_Header header = {0};
-          if(os_file_read_struct(file, 0, &header) == sizeof(header))
-          {
-            t->rdi_is_stale = (header.encoding_version != RDI_ENCODING_VERSION);
-          }
-        }
-        os_file_close(file);
-      }
-      B32 rdi_is_stale = t->rdi_is_stale;
-      
-      //- rjf: calculate thread counts for conversion processes
-      if(!og_is_rdi && rdi_is_stale && t->thread_count == 0)
-      {
-        U64 thread_count = 1;
-        U64 max_thread_count = os_get_system_info()->logical_processor_count;
-        {
-          if(0){}
-          else if(og_size <= MB(4))   {thread_count = 1;}
-          else if(og_size <= MB(256)) {thread_count = max_thread_count/4;}
-          else if(og_size <= MB(512)) {thread_count = max_thread_count/3;}
-          else if(og_size <= GB(1)) {thread_count = max_thread_count/2;}
-          else {thread_count = max_thread_count;}
-        }
-        thread_count = Max(1, thread_count);
-        t->thread_count = thread_count;
-      }
-      
-      //- rjf: determine if there are threads available
-      B32 threads_available = 0;
-      {
-        U64 max_threads = os_get_system_info()->logical_processor_count*2;
-        U64 current_threads = di_shared->conversion_thread_count;
-        U64 needed_threads = (current_threads + t->thread_count);
-        threads_available = (max_threads >= needed_threads);
-      }
-      
-      //- rjf: launch conversion processes
-      if(threads_available && !og_is_rdi && rdi_is_stale && t->thread_count != 0 && t->status != DI_LoadTaskStatus_Active)
-      {
-        B32 should_compress = 0;
-        OS_ProcessLaunchParams params = {0};
-        params.path = os_get_process_info()->binary_path;
-        params.inherit_env = 1;
-        params.consoleless = 1;
-        str8_list_pushf(scratch.arena, &params.cmd_line, "raddbg");
-        str8_list_pushf(scratch.arena, &params.cmd_line, "--bin");
-        str8_list_pushf(scratch.arena, &params.cmd_line, "--quiet");
-        if(should_compress)
-        {
-          str8_list_pushf(scratch.arena, &params.cmd_line, "--compress");
-        }
-        // str8_list_pushf(scratch.arena, &params.cmd_line, "--capture");
-        str8_list_pushf(scratch.arena, &params.cmd_line, "--rdi");
-        str8_list_pushf(scratch.arena, &params.cmd_line, "--out:%S", rdi_path);
-        str8_list_pushf(scratch.arena, &params.cmd_line, "--thread_count:%I64u", t->thread_count);
-        str8_list_pushf(scratch.arena, &params.cmd_line, "--signal_pid:%I64u", (U64)os_get_process_info()->pid);
-        str8_list_pushf(scratch.arena, &params.cmd_line, "--signal_code:%I64u", (U64)t);
-        str8_list_pushf(scratch.arena, &params.cmd_line, "%S", og_path);
-        ProfMsg("launch creation for %.*s", str8_varg(rdi_path));
-        t->process = os_process_launch(&params);
-        t->status = DI_LoadTaskStatus_Active;
-        di_shared->conversion_process_count += 1;
-        di_shared->conversion_thread_count += t->thread_count;
-        
-        // rjf: send event
-        MutexScope(di_shared->event_mutex)
-        {
-          DI_EventNode *n = push_array(di_shared->event_arena, DI_EventNode, 1);
-          SLLQueuePush(di_shared->events.first, di_shared->events.last, n);
-          di_shared->events.count += 1;
-          n->v.kind = DI_EventKind_ConversionStarted;
-          n->v.string = str8_copy(di_shared->event_arena, rdi_path);
-        }
-      }
-      
-      //- rjf: if active & process has completed, mark as done
-      {
-        U64 exit_code = 0;
-        if(t->status == DI_LoadTaskStatus_Active)
-        {
-          B32 task_is_done = 0;
-          for(DI_LoadCompletion *c = first_completion; c != 0; c = c->next)
-          {
-            if(c->code == (U64)t)
+            if(di_key_match(n->key, key))
             {
-              task_is_done = 1;
+              og_path = str8_copy(scratch.arena, n->path);
+              og_min_timestamp = n->min_timestamp;
               break;
             }
           }
-          if(!task_is_done)
-          {
-            task_is_done = os_process_join(t->process, 0, 0);
-          }
-          if(task_is_done)
-          {
-            t->status = DI_LoadTaskStatus_Done;
-            di_shared->conversion_process_count -= 1;
-            di_shared->conversion_thread_count -= t->thread_count;
-          }
         }
-      }
-      
-      //- rjf: if the RDI for this task is not stale, then we're already done - mark this
-      // task as done & prepped for storing into the cache
-      if(!rdi_is_stale)
-      {
-        t->status = DI_LoadTaskStatus_Done;
-      }
-      
-      //- rjf: if the RDI for this task *is* stale, but the O.G. path is actually RDI,
-      // then we can't actually re-convert to produce a non-stale RDI. in this case, just
-      // mark as done.
-      if(rdi_is_stale && og_is_rdi)
-      {
-        t->status = DI_LoadTaskStatus_Done;
-      }
-      
-      //- rjf: if task is done, retire & recycle task; gather path to load
-      if(t->status == DI_LoadTaskStatus_Done)
-      {
-        if(!os_handle_match(t->process, os_handle_zero())) MutexScope(di_shared->event_mutex)
+        
+        //- rjf: analyze O.G. debug info
+        if(!t->og_analyzed)
         {
-          DI_EventNode *n = push_array(di_shared->event_arena, DI_EventNode, 1);
-          SLLQueuePush(di_shared->events.first, di_shared->events.last, n);
-          di_shared->events.count += 1;
-          n->v.kind = DI_EventKind_ConversionEnded;
-          n->v.string = str8_copy(di_shared->event_arena, rdi_path);
+          t->og_analyzed = 1;
+          OS_Handle file = os_file_open(OS_AccessFlag_ShareRead|OS_AccessFlag_Read, og_path);
+          FileProperties props = os_properties_from_file(file);
+          t->og_size = props.size;
+          U64 rdi_magic_maybe = 0;
+          if(os_file_read_struct(file, 0, &rdi_magic_maybe) == 8 &&
+             rdi_magic_maybe == RDI_MAGIC_CONSTANT)
+          {
+            t->og_is_rdi = 1;
+          }
+          os_file_close(file);
         }
-        DLLRemove(di_shared->first_load_task, di_shared->last_load_task, t);
-        SLLStackPush(di_shared->free_load_task, t);
-        ParseTaskNode *n = push_array(scratch.arena, ParseTaskNode, 1);
-        n->v.key = key;
-        n->v.rdi_path = rdi_path;
-        SLLQueuePush(first_parse_task, last_parse_task, n);
-        parse_tasks_count += 1;
-      }
-    }
+        U64 og_size = t->og_size;
+        B32 og_is_rdi = t->og_is_rdi;
+        
+        //- rjf: compute key's RDI path
+        String8 rdi_path = {0};
+        {
+          if(og_is_rdi)
+          {
+            rdi_path = og_path;
+          }
+          else
+          {
+            rdi_path = str8f(scratch.arena, "%S.rdi", str8_chop_last_dot(og_path));
+          }
+        }
+        
+        //- rjf: determine if RDI is stale
+        if(!t->rdi_analyzed)
+        {
+          t->rdi_analyzed = 1;
+          OS_Handle file = os_file_open(OS_AccessFlag_ShareRead|OS_AccessFlag_Read, rdi_path);
+          FileProperties props = os_properties_from_file(file);
+          if(props.modified < og_min_timestamp)
+          {
+            t->rdi_is_stale = 1;
+          }
+          else
+          {
+            t->rdi_is_stale = 1;
+            RDI_Header header = {0};
+            if(os_file_read_struct(file, 0, &header) == sizeof(header))
+            {
+              t->rdi_is_stale = (header.encoding_version != RDI_ENCODING_VERSION);
+            }
+          }
+          os_file_close(file);
+        }
+        B32 rdi_is_stale = t->rdi_is_stale;
+        
+        //- rjf: calculate thread counts for conversion processes
+        if(!og_is_rdi && rdi_is_stale && t->thread_count == 0)
+        {
+          U64 thread_count = 1;
+          U64 max_thread_count = os_get_system_info()->logical_processor_count;
+          if(priority_idx > 0)
+          {
+            max_thread_count = Max(1, max_thread_count/2);
+          }
+          {
+            if(0){}
+            else if(og_size <= MB(4))   {thread_count = 1;}
+            else if(og_size <= MB(256)) {thread_count = max_thread_count/4;}
+            else if(og_size <= MB(512)) {thread_count = max_thread_count/3;}
+            else if(og_size <= GB(1)) {thread_count = max_thread_count/2;}
+            else {thread_count = max_thread_count;}
+          }
+          thread_count = Max(1, thread_count);
+          t->thread_count = thread_count;
+        }
+        
+        //- rjf: determine if there are threads available
+        B32 threads_available = 0;
+        {
+          U64 max_threads = os_get_system_info()->logical_processor_count;
+          U64 current_threads = di_shared->conversion_thread_count;
+          U64 needed_threads = (current_threads + t->thread_count);
+          threads_available = (max_threads >= needed_threads);
+        }
+        
+        //- rjf: launch conversion processes
+        if(threads_available && !og_is_rdi && rdi_is_stale && t->thread_count != 0 && t->status != DI_LoadTaskStatus_Active)
+        {
+          B32 should_compress = 0;
+          OS_ProcessLaunchParams params = {0};
+          params.path = os_get_process_info()->binary_path;
+          params.inherit_env = 1;
+          params.consoleless = 1;
+          str8_list_pushf(scratch.arena, &params.cmd_line, "raddbg");
+          str8_list_pushf(scratch.arena, &params.cmd_line, "--bin");
+          str8_list_pushf(scratch.arena, &params.cmd_line, "--quiet");
+          if(should_compress)
+          {
+            str8_list_pushf(scratch.arena, &params.cmd_line, "--compress");
+          }
+          // str8_list_pushf(scratch.arena, &params.cmd_line, "--capture");
+          str8_list_pushf(scratch.arena, &params.cmd_line, "--rdi");
+          str8_list_pushf(scratch.arena, &params.cmd_line, "--out:%S", rdi_path);
+          str8_list_pushf(scratch.arena, &params.cmd_line, "--thread_count:%I64u", t->thread_count);
+          str8_list_pushf(scratch.arena, &params.cmd_line, "--signal_pid:%I64u", (U64)os_get_process_info()->pid);
+          str8_list_pushf(scratch.arena, &params.cmd_line, "--signal_code:%I64u", (U64)t);
+          str8_list_pushf(scratch.arena, &params.cmd_line, "%S", og_path);
+          ProfMsg("launch creation for %.*s", str8_varg(rdi_path));
+          t->process = os_process_launch(&params);
+          t->status = DI_LoadTaskStatus_Active;
+          di_shared->conversion_process_count += 1;
+          di_shared->conversion_thread_count += t->thread_count;
+          
+          // rjf: send event
+          MutexScope(di_shared->event_mutex)
+          {
+            DI_EventNode *n = push_array(di_shared->event_arena, DI_EventNode, 1);
+            SLLQueuePush(di_shared->events.first, di_shared->events.last, n);
+            di_shared->events.count += 1;
+            n->v.kind = DI_EventKind_ConversionStarted;
+            n->v.string = str8_copy(di_shared->event_arena, rdi_path);
+          }
+        }
+        
+        //- rjf: if active & process has completed, mark as done
+        {
+          U64 exit_code = 0;
+          if(t->status == DI_LoadTaskStatus_Active)
+          {
+            B32 task_is_done = 0;
+            for(DI_LoadCompletion *c = first_completion; c != 0; c = c->next)
+            {
+              if(c->code == (U64)t)
+              {
+                task_is_done = 1;
+                break;
+              }
+            }
+            if(!task_is_done)
+            {
+              task_is_done = os_process_join(t->process, 0, 0);
+            }
+            if(task_is_done)
+            {
+              t->status = DI_LoadTaskStatus_Done;
+              di_shared->conversion_process_count -= 1;
+              di_shared->conversion_thread_count -= t->thread_count;
+            }
+          }
+        }
+        
+        //- rjf: if the RDI for this task is not stale, then we're already done - mark this
+        // task as done & prepped for storing into the cache
+        if(!rdi_is_stale)
+        {
+          t->status = DI_LoadTaskStatus_Done;
+        }
+        
+        //- rjf: if the RDI for this task *is* stale, but the O.G. path is actually RDI,
+        // then we can't actually re-convert to produce a non-stale RDI. in this case, just
+        // mark as done.
+        if(rdi_is_stale && og_is_rdi)
+        {
+          t->status = DI_LoadTaskStatus_Done;
+        }
+        
+        //- rjf: if task is done, retire & recycle task; gather path to load
+        if(t->status == DI_LoadTaskStatus_Done)
+        {
+          if(!os_handle_match(t->process, os_handle_zero())) MutexScope(di_shared->event_mutex)
+          {
+            DI_EventNode *n = push_array(di_shared->event_arena, DI_EventNode, 1);
+            SLLQueuePush(di_shared->events.first, di_shared->events.last, n);
+            di_shared->events.count += 1;
+            n->v.kind = DI_EventKind_ConversionEnded;
+            n->v.string = str8_copy(di_shared->event_arena, rdi_path);
+          }
+          DLLRemove(di_shared->first_load_task[priority_idx], di_shared->last_load_task[priority_idx], t);
+          SLLStackPush(di_shared->free_load_task, t);
+          ParseTaskNode *n = push_array(scratch.arena, ParseTaskNode, 1);
+          n->v.key = key;
+          n->v.rdi_path = rdi_path;
+          SLLQueuePush(first_parse_task, last_parse_task, n);
+          parse_tasks_count += 1;
+        }
+      }
+    }
     
     ////////////////////////////
     //- rjf: join all parse tasks
diff --git a/src/dbg_info/dbg_info.h b/src/dbg_info/dbg_info.h
index 0002088a..8280a8a0 100644
--- a/src/dbg_info/dbg_info.h
+++ b/src/dbg_info/dbg_info.h
@@ -267,8 +267,8 @@ struct DI_Shared
   DI_RequestBatch req_batches[2]; // [0] -> high priority, [1] -> low priority
   
   // rjf: conversion tasks
-  DI_LoadTask *first_load_task;
-  DI_LoadTask *last_load_task;
+  DI_LoadTask *first_load_task[2];
+  DI_LoadTask *last_load_task[2];
   DI_LoadTask *free_load_task;
   U64 conversion_process_count;
   U64 conversion_thread_count;
diff --git a/src/raddbg/raddbg_main.c b/src/raddbg/raddbg_main.c
index 3861c3f4..7099d25f 100644
--- a/src/raddbg/raddbg_main.c
+++ b/src/raddbg/raddbg_main.c
@@ -148,13 +148,13 @@
 // [ ] step-out-of-loop
 //
 //- late-conversion performance improvements
-// [ ] investigate wide-conversion performance
-//  [ ] oversubscribing cores?
-//  [ ] conversion crashes?
+// [x] investigate wide-conversion performance
+//  [x] oversubscribing cores?
+//  [x] conversion crashes?
 // [ ] live++ investigations - ctrl+alt+f11 in UE?
 //
 //- memory usage improvements
-// [ ] "root" concept in hash store, which buckets keys & allows usage code to
+// [x] "root" concept in hash store, which buckets keys & allows usage code to
 //     jettison a collection of keys in retained mode fashion
 //
 //- short-to-medium term future features