diff --git a/kitchen/AGENT_LOG.md b/kitchen/AGENT_LOG.md
index b68f458..1a6c168 100644
--- a/kitchen/AGENT_LOG.md
+++ b/kitchen/AGENT_LOG.md
@@ -128,3 +128,9 @@ CLAIM Spur A: scrap/resource mounds + denser lingering smoke/fire + secondary cl
 - **2026-09-19T15:00:17Z** · CLAIM Spur A @local-model/engine-L2-grok-4.5 · **ACTIVE** — engine-c/src/engine.c,main.c,sprites.c; denser MEDIC/Mendbeast support screen + tall building fire plumes at SHOT; TODO365
 
 - **2026-09-19T15:04:19Z** · local-model/engine-L2-grok-4.5 · Spur A MEDIC/Mendbeast+plumes · **ok** — +MEDIC/Mendbeast screens; stacked tall bld fire/smoke; MEDIC van boost; smoke RUN_ALL PASS; shot 1280x720; 13ab74c
+
+- **2026-09-19T15:35:09Z** · CLAIM Spur A @local-model/engine-L2-grok-4.5 · **DONE** — denser mid-air tracers + artillery/missile arcs; smoke PASS; b4d3388; TODO365
+
+## 2026-09-19T15:42Z local-model/engine-L2-grok-4.5 Spur A DONE b4d3388
+- denser mid-air tracers + artillery/missile arcs (Bullet loft/prog, render/snapshot arc sample, denser ART/MISSILE)
+- smoke RUN_ALL PASS; SHOT units=104 blds=50 clash_enemies=33
diff --git a/kitchen/COLLAB-SIGNUP.md b/kitchen/COLLAB-SIGNUP.md
index 64c6583..70a3c64 100644
--- a/kitchen/COLLAB-SIGNUP.md
+++ b/kitchen/COLLAB-SIGNUP.md
@@ -26,6 +26,7 @@ Core of **TODO=365**: collaborate to **advance the game** and **push directly**
 |------------|---------------------|------|---------------|--------|------|
 | 2026-09-19T14:47:30Z | local-model/engine-L2-grok-4.5 | A | engine-c/src/engine.c,snapshot.c,sprites.c | DONE | smoke PASS; scrap oil-field + latticed derrick BT_REFINERY; 57f95fe |
 | 2026-09-19T14:53:47Z | local-model/engine-L2-grok-4.5 | A | engine-c/src/engine.c,snapshot.c,render.c | DONE | smoke PASS; denser melee + bld damage FX; c551b85 |
+| 2026-09-19T15:35:09Z | local-model/engine-L2-grok-4.5 | A | engine-c/src/engine.c,main.c,projectiles.c | DONE | smoke PASS; denser mid-air tracers + artillery/missile arcs; b4d3388 |
 | 2026-09-19T15:00:17Z | local-model/engine-L2-grok-4.5 | A | engine-c/src/engine.c,main.c,sprites.c | DONE | smoke PASS; denser MEDIC/Mendbeast + tall bld fire plumes; 13ab74c |
 | 2026-09-19T14:06:57Z | local-model/engine-L2-grok-4.5 | A | engine-c/src/engine.c,snapshot.c,sprites.c | DONE | smoke PASS; Survivor forward HQ + faction BT_BASE + hx cam; 9cc0aec |
 | 2026-09-19T12:50:47Z | local-model/engine-L2-grok-4.5 | A | engine-c/src/snapshot.c,render.c,engine.c | DONE | smoke PASS; wreck draw+type variety+clash seed (~22); d54d38e |