Melee killbot: 360-degree crowbar silent aim

- New feature (default on): while the local player's active weapon is the
  crowbar, pick the nearest visible hostile NPC within the 75-unit crowbar
  range, sorted by distance to its collision AABB, and attack it through the
  normal silent-aim path (usercmd view + IN_ATTACK, movement preserved,
  rendered view restored at FRAME_RENDER_START).
- Prefer the nearest visible hitbox center; fall back to the AABB center /
  closest point when bones are unavailable. Reuses the existing friendly /
  neutral and life-state filters and the world-only vischeck.
- Detect the active weapon from the client m_hActiveWeapon handle, with the
  authoritative server m_hActiveWeapon handle as a fallback (client entity
  index from the low 16 bits).
- While the crowbar is active and this feature is on, skip the gun aimbot,
  triggerbot and silent aim so they do not fight over the usercmd view.
- Menu: Melee killbot -> Active; config [melee] active=...

1 files changed, 23 insertions, 2 deletions

diff --git a/CONTEXT.md b/CONTEXT.md
index 38d9373..8fb2197 100644
--- a/CONTEXT.md
+++ b/CONTEXT.md
@@ -81,6 +81,7 @@ Relevant vtable slots (this build):
 | `m_lifeState` | `0x7F` |
 | `m_nModelIndex` | `0x7C` |
 | `m_vecAbsVelocity` (client local, not netvar) | `0x11C` |
+| `m_hActiveWeapon` (client netvar; server fallback `0x824`) | resolved by name |
 
 - Eye position = `m_vecOrigin + m_vecViewOffset` on **all three axes**.
   (The old code added the X component to Z, which left the eye ~64 units low.)
@@ -108,6 +109,8 @@ HL2hake
   Jumpbug
     Active
     Assist timing
+  Melee killbot
+    Active
   ESP
     Active
     Show neutral / healthbar / healthnum / name / skeleton / box / speed graph
@@ -163,6 +166,26 @@ Binds use SDL scancodes; mouse buttons are pseudo-scancodes 600..604.
   zero forward/side movement; HL2's jump speed-bound subtraction then
   accelerates along the velocity. Camera restored at `FRAME_RENDER_START`.
 
+## Melee killbot
+
+- Active only while the local player's active weapon is the crowbar. The
+  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.
+- 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
+  nearest visible one.
+- The usercmd view is pointed at the target for one command with `IN_ATTACK`;
+  movement keys are rotated with `preserve_movement`, and the rendered view is
+  restored immediately and at `FRAME_RENDER_START` (same silent-aim path).
+  This gives a 360-degree silent melee attack.
+- While the crowbar is active and the killbot feature is on, the gun aimbot,
+  triggerbot and silent aim are skipped to avoid fighting over the usercmd
+  view.
+- Vischeck uses the shared `MASK_VISIBLE`/world-only path (static props are
+  ignored).
+
 ## Jumpbug
 
 - Automatic while falling when the predicted landing speed
@@ -212,8 +235,6 @@ Binds use SDL scancodes; mouse buttons are pseudo-scancodes 600..604.
 
 ## Roadmap / TODO
 
-- **Melee killbot**: 360° silent aim for hostile NPCs inside crowbar/melee
-  range, sorted by distance, only while the crowbar is held.
 - **GUI**: replace/augment the VGUI ISurface menu with an immediate-mode GUI
   (Dear ImGui or a custom implementation); needs a design grill first.
 - **Distance weapon spread thesis**: TBD — user will explain. Likely models