diff --git a/.project/objectives/g2-06-soil-derivation.md b/.project/objectives/g2-06-soil-derivation.md
index c996c8df..3a514330 100644
--- a/.project/objectives/g2-06-soil-derivation.md
+++ b/.project/objectives/g2-06-soil-derivation.md
@@ -2,12 +2,11 @@
 id: g2-06
 title: Soil derivation layer — emergent soil order from rock + climate + slope (the one unbuilt worldsim engine)
 priority: p2
-status: missing
+status: in_progress
 scope: game1
-updated_at: 2026-06-06
+updated_at: 2026-06-08
 blocked_by: [p2-80, g2-05]
 ---
-
 ## Summary
 
 Soil derivation is **the one runtime-worldsim piece whose engine does not
diff --git a/tooling/claude/dot-claude/worktrees/agent-abc8654580f44f4c4 b/tooling/claude/dot-claude/worktrees/agent-abc8654580f44f4c4
new file mode 160000
index 00000000..0eedd780
--- /dev/null
+++ b/tooling/claude/dot-claude/worktrees/agent-abc8654580f44f4c4
@@ -0,0 +1 @@
+Subproject commit 0eedd780d9590e39edf67b0d08b2f0246d3981ae
diff --git a/tooling/claude/dot-claude/worktrees/agent-ac65e9005b65c6198 b/tooling/claude/dot-claude/worktrees/agent-ac65e9005b65c6198
new file mode 160000
index 00000000..0eedd780
--- /dev/null
+++ b/tooling/claude/dot-claude/worktrees/agent-ac65e9005b65c6198
@@ -0,0 +1 @@
+Subproject commit 0eedd780d9590e39edf67b0d08b2f0246d3981ae