Docs: session log — group-A L3 netcode gate PASS (live server==client + SpawnId fix)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Docs/Vault/07_Sessions/2026/2026-07-14_Lantern_Phase1_GroupA_Combat_Sockets.md

@@ -46,9 +46,14 @@ essence (one atlas, ~3 materials, zero per-asset texturing). The in-engine style
 
 ## Open / deferred (surfaced, NOT silent)
 
-- **Group-A L3 gate (NEXT):** two-player Play + induced-rollback for the predicted `SocketCooldown` (NP-4
-  gate) + the operator's eyes on muzzle/anim/HUD. Needs a socketed Spark (sockets bake empty) — a default gym
-  loadout (socket0=Primary projectile, socket1=Cone) makes firing testable.
+- **Group-A L3 gate — NETCODE HALF: PASS.** Live instant-play validation (guardian over ServerWorld +
+  ClientWorld; socket-fire injection added to `DebugInputInjectionSystem`): socket 0&1 = a projectile Spark,
+  fired same-frame → `maxSrvProj=2 maxCliProj=2` (server==client parity), `distinctSpawnIds=2` +
+  `distinctSocketBits=2` (the SpawnId desync fix confirmed LIVE), both per-socket cooldowns advanced. **FEEL
+  HALF deferred to post-Group-B** (operator's choice — the visual muzzle/anim/HUD read is meaningful against
+  real Sparks). **Induced-rollback (NP-4 belt-and-suspenders)** still wants a 2-instance/packet-loss session;
+  the predicted `SocketCooldown` is a `[GhostField]` scalar (proven rollback shape) + the fire path is
+  server==client, so the core is sound.
 - **AbilityRef-removal cleanup:** the `FrameId` server-writer + the 2 class-HUD re-points + `HudSystem`'s
   ability bar + removing legacy `AbilityRef`/`AbilityCooldown`/`EffectiveAbilityStats` — deferred because
   `AbilityRef` still works as the class signal through the transition (no feel regression).