Docs/cleanup: refresh CONTEXT, update ISurface status, remove dead code

- rewrite CONTEXT.md for the current architecture, interfaces, netvars,
  menu tree, bones/ESP, aimbot/vischeck, triggerbot, silent aim and ABH
- update ISURFACE_STATUS.md: DrawLine slot, current menu/config path,
  9 build TUs, current file layout
- remove the stale root-level `tree` file
- drop unused class_health_off/per-class health scan (NPC HP is not
  networked), surf_call_slot, and unused scancode helpers

4 files changed, 27 insertions, 82 deletions

diff --git a/src/ISURFACE_STATUS.md b/src/ISURFACE_STATUS.md
index de952cd..00a7adf 100644
--- a/src/ISURFACE_STATUS.md
+++ b/src/ISURFACE_STATUS.md
@@ -1,13 +1,13 @@
 # HL2hake ISurface Drawing — Status Report
 
-## Date: 2026-09-12 (final round)
+## Date: 2026-09-12, updated 2026-10-26
 
 ## Result: WORKING
 
 Overlay drawing works in-game and in menus. Draw path: `PaintTraverseEx`
 hook (slot 114) on the copied ISurface vtable, wrapping our draws in
 `PushMakeCurrent(panel, false)` / `PopMakeCurrent(panel)` around ISurface
-slots 6/10/12/17/18/20/22/66/67.
+slots 6/10/12/15/17/18/20/22/66/67.
 
 ## Confirmed ISurface VTable Slots (disassembly-verified, binary=SDK header+4)
 
@@ -18,6 +18,8 @@ slots 6/10/12/17/18/20/22/66/67.
 | 9    | `PopMakeCurrent(VPANEL)`                  | verified via disassembly |
 | 10   | `DrawSetColor(int r,g,b,a)`               | stores RGBA at `this+0x24..0x27` |
 | 12   | `DrawFilledRect(int x0,y0,x1,y1)`         | verified via disassembly |
+| 14   | `DrawOutlinedRect(int x0,y0,x1,y1)`       | SDK header 10 + 4 |
+| 15   | `DrawLine(int x0,y0,x1,y1)`               | SDK header 11 + 4 (skeleton ESP) |
 | 17   | `DrawSetTextFont(HFont)`                  | stores HFont at `this+0x290` |
 | 18   | `DrawSetTextColor(int r,g,b,a)`           | stores RGBA at `this+0x28..0x2b` |
 | 20   | `DrawSetTextPos(int x,y)`                 | stores at `this+0x2c/0x30` |
@@ -65,24 +67,27 @@ fc-match findings (system fontconfig):
 
 ## Menu
 
-- Tree: HL2hake → Bunnyhop/ABH, children indented (`g_depth[]`, +12px/level).
-- Right-aligned state at x=200: `[on]`/`[off]` for Active rows,
-  `[keyname]` for Bind rows, `[press key]` while binding.
+- Starts fully collapsed on first open; `Insert` toggles it.
+- Tree: HL2hake -> Bunnyhop (Active, Auto-strafe), ABH (Active), ESP (Active,
+  Show neutral/healthbar/healthnum/name/skeleton/box), Aimbot (Active, Bind,
+  Vischeck, Bones, Smoothness), Triggerbot (Active, Bind), Silent aim
+  (Active, Bind). Children indented by `g_depth[]` (+12px/level).
+- Right-aligned state at x=270: `[on]`/`[off]` for toggles, `[keyname]` for
+  binds, `[press key]` while binding, `N deg/tick` for values.
 - Feature gating: `feature_active(int)` (menu.cpp) — active AND
-  (bind==0 or key held). Called from `do_move` (hl2h.cpp) to gate
-  bhop (jump) and ABH branches.
-- Config: INI at `~/.hl2hake.ini` (bhop/abh active+bind).
+  (bind==0 or key held), used by `do_move` and the aim features.
+- Config: `$XDG_CONFIG_HOME/hl2hake/config` (fallback `~/.config/hl2hake/config`).
 
 ## Build / Run
 
-- `./build.sh`: g++ `-m32 -O2 -fPIC -shared`, links 5 TUs, `-ldl`,
+- `./build.sh`: g++ `-m32 -O2 -std=c++17 -fPIC -shared`, 9 TUs
+  (`hl2h modules cinput netvars menu esp server bones vischeck`), `-ldl`,
   `-Wall -Wextra -Werror` (all warnings fatal).
 - `./play.sh -windowed +map d1_trainstation_01` (Steam runtime wrapper,
   `LD_PRELOAD=libhl2hake.so`).
-- Logs: `/tmp/hl2hake.log` (logf), `/tmp/hl2run.log` (stderr).
-- Probe logging (`hook fired:`, `probe:`) removed 2026-09-12.
+- Logs: `/tmp/hl2hake.log` (logf), stderr.
 - `HL2H_DRAW_TEST=1` env: draws red rect + "HL2H DRAW TEST" without
-  opening the menu.
+  opening the menu. `HL2H_BONE_DEBUG=1` draws head-hitbox markers.
 
 ## Lessons
 
@@ -98,7 +103,12 @@ fc-match findings (system fontconfig):
 ## File Locations
 
 - Project: `/home/salmon/Documents/rust/hl2h/`
-- Hook + feature logic: `src/hl2h.cpp`
+- Hook + movement/feature logic: `src/hl2h.cpp`
 - Menu + drawing + config + input: `src/menu.cpp`
+- ESP / skeleton drawing / aimbot / silent aim: `src/esp.cpp`
+- Bones + hitboxes: `src/bones.cpp`
+- Server-side entity/health access: `src/server.cpp`
+- World vischeck / entity trace: `src/vischeck.cpp`
 - Shared API: `src/hl2h.h`
+- Current project overview: `CONTEXT.md`
 - SDK headers: `source-sdk-2013/src/public/vgui/`
diff --git a/src/hl2h.h b/src/hl2h.h
index a08f029..37c849f 100644
--- a/src/hl2h.h
+++ b/src/hl2h.h
@@ -168,7 +168,6 @@ void fix_verified_crc(int seq, uint32_t crc);
 uint32_t usercmd_checksum(const CUserCmd *c);
 bool find_input_global();
 void resolve_netvars();
-int class_health_off(const char *name);
 bool resolve_server_netvars();
 int server_entity_health(int idx, int *maxhealth, int *lifestate, void **base_out);
 int server_model_index(void *base);
@@ -203,10 +202,6 @@ bool head_position(int idx, Vector &out);
 int aim_points(int idx, unsigned group_mask, Vector *out, int max);
 
 void outer_draw();
-// raw ISurface slot calls used by the PaintTraverseEx hook (hl2h.cpp)
-using SurfFn = void (*)(void *, ...);
-long surf_call_slot(void *surf, int slot, long a1 = 0, long a2 = 0);
-
 // ISurface pointer (defined in menu.cpp, used for drawing tests)
 struct ISurface;
 extern ISurface *g_surface;
diff --git a/src/menu.cpp b/src/menu.cpp
index c3bb9ae..d628873 100644
--- a/src/menu.cpp
+++ b/src/menu.cpp
@@ -217,22 +217,6 @@ static std::string config_path() {
   return dir + "/config";
 }
 
-[[maybe_unused]] static const char *sdl_scancode_name(int sc) {
-  if (sc == 0)
-    return "None";
-  static char buf[32];
-  snprintf(buf, sizeof(buf), "Key%d", sc);
-  return buf;
-}
-
-[[maybe_unused]] static int parse_sdl_scancode(const char *s) {
-  if (strcmp(s, "None") == 0 || strcmp(s, "") == 0)
-    return 0;
-  if (strncmp(s, "Key", 3) == 0)
-    return atoi(s + 3);
-  return 0;
-}
-
 static void config_save() {
   FILE *f = fopen(config_path().c_str(), "w");
   if (!f)
@@ -758,14 +742,6 @@ void outer_draw() {
   surf_pop_make_current(panel);
 }
 
-// Call an arbitrary ISurface vtable slot with up to 2 long args (cdecl thiscall
-// on i386: this first, rest on stack).
-long surf_call_slot(void *surf, int slot, long a1, long a2) {
-  void **vt = *(void ***)surf;
-  using Fn = long (*)(void *, long, long);
-  return ((Fn)vt[slot])(surf, a1, a2);
-}
-
 // ---------------------------------------------------------------------------
 // ISurface discovery — try known modules and all loaded .so files
 // ---------------------------------------------------------------------------
diff --git a/src/netvars.cpp b/src/netvars.cpp
index f702c41..b4e31d5 100644
--- a/src/netvars.cpp
+++ b/src/netvars.cpp
@@ -27,24 +27,7 @@ static bool module_string(uintptr_t p, char *out, size_t outn) {
 
 static int g_dumped_tables = 0;
 
-// per-client-class health offset (m_iHealth lives at different offsets per
-// class chain: CBasePlayer via DT_BasePlayer=128, NPCs via DT_BaseCombatCharacter)
-static struct {
-  char name[32];
-  int off;
-} g_class_health[256];
-static int g_class_health_n = 0;
-
-int class_health_off(const char *name) {
-  for (int i = 0; i < g_class_health_n; i++)
-    if (strcmp(name, g_class_health[i].name) == 0)
-      return g_class_health[i].off;
-  return -1;
-}
-
-static void collect_netvars(uintptr_t table, uintptr_t base_off, int depth,
-                            int *out_health)
-{
+static void collect_netvars(uintptr_t table, uintptr_t base_off, int depth) {
   if (depth > 8)
     return;
   uintptr_t props = *(uintptr_t *)(table + 0x00);
@@ -85,13 +68,10 @@ static void collect_netvars(uintptr_t table, uintptr_t base_off, int depth,
       logf("  [%s] %s type=%d off=%d(0x%x) table=%s array=%s", tname, pname2,
            ptype, poff, poff, ptable ? "yes" : "no", parray ? "yes" : "no");
     if (ptable) {
-      collect_netvars(ptable, base_off + (uint32_t)poff, depth + 1,
-                      out_health);
+      collect_netvars(ptable, base_off + (uint32_t)poff, depth + 1);
       continue;
     }
 
-    if (out_health && *out_health < 0 && strcmp(pname2, "m_iHealth") == 0)
-      *out_health = (int)(base_off + (uint32_t)poff);
     if (strcmp(pname2, "m_lifeState") == 0 && g_net.lifestate < 0) {
       g_net.lifestate = (int)(base_off + (uint32_t)poff);
     } else if (strcmp(pname2, "m_nModelIndex") == 0 && g_net.modelindex < 0) {
@@ -217,25 +197,9 @@ void resolve_netvars() {
   for (uintptr_t cc = head; cc && g_client.contains(cc) && classes < 1024;
        cc = *(uintptr_t *)(cc + 0x10)) {
     classes++;
-    char cname[32];
-    int hoff = -1;
-    // per-class health offset — NPCs send m_iHealth via their own table chain,
-    // not DT_BasePlayer's; g_net.health keeps the player's for aimbot use
-    if (module_string(*(uintptr_t *)(cc + 0x08), cname, sizeof(cname))) {
-      collect_netvars(*(uintptr_t *)(cc + 0x0C), 0, 0, &hoff);
-      if (hoff >= 0 && g_class_health_n < 256) {
-        char *dst = g_class_health[g_class_health_n].name;
-        const char *src = cname;
-        size_t n = sizeof(g_class_health[g_class_health_n].name) - 1;
-        for (size_t i = 0; i < n && src[i]; i++) dst[i] = src[i];
-        dst[n] = 0;
-        g_class_health[g_class_health_n].off = hoff;
-        g_class_health_n++;
-      }
-    }
+    collect_netvars(*(uintptr_t *)(cc + 0x0C), 0, 0);
   }
-  logf("client classes walked: %d, health-offset classes: %d", classes,
-       g_class_health_n);
+  logf("client classes walked: %d", classes);
 
   if (g_net.movetype < 0 && !resolve_movetype()) {
     // movetype unresolved — bhop still works, just no noclip/ladder guard