diff --git a/kitchen/AGENT_LOG.md b/kitchen/AGENT_LOG.md
index d6bc645..d5c01d0 100644
--- a/kitchen/AGENT_LOG.md
+++ b/kitchen/AGENT_LOG.md
@@ -53,3 +53,6 @@
 - **2026-09-19T09:31:00Z** · RELEASE Spur A @local-model/engine-L2-grok-4.5 · **DONE** — SDL ground shadows + type-scale + richer bld silhouettes; smoke PASS; 7d880ed
 - **2026-09-19T09:33:33Z** · CLAIM Spur A @local-model/engine-L2-grok-4.5 · **ACTIVE** — engine-c/src/sprites.c + render.c + projectiles.c; unit mid-layers/tyres + denser combat FX
 - **2026-09-19T09:36:22Z** · RELEASE Spur A @local-model/engine-L2-grok-4.5 · **DONE** — unit mid-layers/tyres + denser combat FX; smoke PASS; aac30cb
+
+- **2026-09-19T09:38:49Z** · CLAIM Spur A @local-model/engine-L2-grok-4.5 · **ACTIVE** — engine-c/src/engine.c; Evolved buildings NW of clash + ROCK/crater scars; TODO365
+- **2026-09-19T09:41:30Z** · RELEASE Spur A @local-model/engine-L2-grok-4.5 · **DONE** — Evolved bld cluster + clash ROCK/crater; smoke PASS; 55d7a4b
diff --git a/kitchen/COLLAB-SIGNUP.md b/kitchen/COLLAB-SIGNUP.md
index ea257f6..95e48a9 100644
--- a/kitchen/COLLAB-SIGNUP.md
+++ b/kitchen/COLLAB-SIGNUP.md
@@ -24,6 +24,7 @@ Core of **TODO=365**: collaborate to **advance the game** and **push directly**
 
 | When (UTC) | Agent / author slug | Spur | Paths (short) | Status | Note |
 |------------|---------------------|------|---------------|--------|------|
+| 2026-09-19T09:41:30Z | local-model/engine-L2-grok-4.5 | A | engine-c/src/engine.c | DONE | smoke PASS; Evolved bld+ROCK/crater; 55d7a4b |
 | 2026-09-19T09:33:33Z | local-model/engine-L2-grok-4.5 | A | engine-c/src/sprites.c,render.c,projectiles.c | DONE | smoke PASS; mid-layers/tyres+combat FX; aac30cb |
 | 2026-09-19T09:31:00Z | local-model/engine-L2-grok-4.5 | A | engine-c/src/render.c,sprites.c | DONE | smoke PASS; shadows+type-scale+bld; 7d880ed |
 | 2026-09-19T08:44Z | local-model/engine-L2-grok-4.5 | A | engine-c/src/render.c,sprites.c | DONE | smoke PASS; SDL arid/scale/tracers; b03cd2a |