Melee: surface weapon state across maps; reset stale caches

- Map transitions often leave a non-crowbar weapon active, so the killbot
  silently does nothing. Log every active-weapon change as a normal
  `melee: active ... crowbar=0/1` line and toast once suggesting the crowbar.
- Recover the crowbar model from the server entity when the client weapon
  model index is missing/0 after a map change.
- Clear the bone cache and aim/silent locks when the local player entity
  changes (map load/respawn) so stale entity/model data cannot poison melee
  target selection.

5 files changed, 47 insertions, 1 deletions

diff --git a/CONTEXT.md b/CONTEXT.md
index a9e34d8..a9b85b9 100644
--- a/CONTEXT.md
+++ b/CONTEXT.md
@@ -190,6 +190,12 @@ vocabulary / decisions.
   client `m_hActiveWeapon` handle is used first; if it is missing, the
   authoritative server `m_hActiveWeapon` handle (0x824) is used to get the
   weapon entity index.
+- Map transitions often switch the active weapon away from the crowbar. The
+  state change is logged as `melee: active ... crowbar=0/1` (normal log), and
+  a one-time toast says to equip the crowbar. If the client weapon model is
+  missing/0, the server model index is used to recognize it.
+- Bone caches and aim locks are cleared when the local player entity changes
+  (map load/respawn).
 - Crowbar range is `CROWBAR_RANGE` 75 units from `Weapon_ShootPosition`. The
   selector computes the closest point on each hostile NPC's AABB to the eye,
   rejects anything farther than 75, sorts by that distance, and picks the
diff --git a/src/bones.cpp b/src/bones.cpp
index 0df13f2..c777067 100644
--- a/src/bones.cpp
+++ b/src/bones.cpp
@@ -509,6 +509,19 @@ bool head_position(int idx, Vector &out) {
 // Collect world-space aim points for the selected hit groups (HITGROUP_*).
 // Group 1 (head) uses head_position for its bone fallback; other groups are
 // the hitbox centers. The caller picks the point nearest to the crosshair.
+void bones_clear() {
+  for (auto &e : g_entries) {
+    e.ent = nullptr;
+    e.valid = false;
+    e.hdr = nullptr;
+    e.count = 0;
+    e.stamp = 0.0;
+  }
+  g_next = 0;
+  g_logged = 0;
+  g_renderable_warned = false;
+}
+
 int aim_points(int idx, unsigned group_mask, Vector *out, int max) {
   if (!out || max <= 0)
     return 0;
diff --git a/src/esp.cpp b/src/esp.cpp
index 06bafaf..a0d84dd 100644
--- a/src/esp.cpp
+++ b/src/esp.cpp
@@ -873,6 +873,8 @@ bool melee_weapon_active(void *local_ent) {
   if (!local_ent)
     return false;
   int local = engine_get_local_player();
+  if (g_iface.engineserver)
+    resolve_server_netvars();
 
   auto check = [&](int idx, const char **cls_out,
                    const char **model_out) -> bool {
@@ -882,6 +884,14 @@ bool melee_weapon_active(void *local_ent) {
     void *net = entity_networkable(idx);
     const char *cls = net ? entity_class_name(net, nullptr) : nullptr;
     const char *model = wep ? entity_model_name(wep) : nullptr;
+    // Client weapon models can be missing/0 after a map change; recover the
+    // server model index so the crowbar is still recognized.
+    if ((!model || !*model) && g_iface.engineserver) {
+      void *sbase = nullptr;
+      server_entity_health(idx, nullptr, nullptr, &sbase);
+      if (sbase)
+        model = model_name_from_index(server_model_index(sbase));
+    }
     *cls_out = cls;
     *model_out = model;
     return (cls && strstr(cls, "Crowbar")) ||
@@ -916,8 +926,15 @@ bool melee_weapon_active(void *local_ent) {
   if (idx != last_idx || crowbar != last_crowbar) {
     last_idx = idx;
     last_crowbar = crowbar;
-    logd("melee: active idx=%d cls=%s model=%s crowbar=%d", idx,
+    logf("melee: active idx=%d cls=%s model=%s crowbar=%d", idx,
          cls ? cls : "?", model ? model : "?", (int)crowbar);
+    if (!crowbar) {
+      static bool warned = false;
+      if (!warned) {
+        warned = true;
+        toastf(TOAST_WARN, "Melee killbot: equip the crowbar");
+      }
+    }
   }
   return crowbar;
 }
diff --git a/src/hl2h.cpp b/src/hl2h.cpp
index 4f5673f..f95f6ed 100644
--- a/src/hl2h.cpp
+++ b/src/hl2h.cpp
@@ -556,6 +556,15 @@ static void do_move(int seq, float frametime) {
   if (!ent)
     return;
 
+  // New map / respawn: drop stale bone caches and target locks.
+  static void *last_local_ent = nullptr;
+  if (ent != last_local_ent) {
+    last_local_ent = ent;
+    bones_clear();
+    aimbot_reset_lock();
+    silentaim_reset_lock();
+  }
+
   if (feature_active(FEAT_SPREAD)) {
     resolve_server_netvars();
     void *srv = nullptr;
diff --git a/src/hl2h.h b/src/hl2h.h
index 9b4fa8a..9c0440f 100644
--- a/src/hl2h.h
+++ b/src/hl2h.h
@@ -286,6 +286,7 @@ bool bone_is_skeleton_core(int idx, int bone);
 int bone_nearest_core_parent(int idx, int bone);
 bool bones_is_humanoid(int idx);
 bool hitbox_center(int idx, const char *hitbox_name, Vector &out);
+void bones_clear();
 bool head_position(int idx, Vector &out);
 int aim_points(int idx, unsigned group_mask, Vector *out, int max);