diff --git a/.gitmodules b/.gitmodules
index 5abcefb..4a64f7b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,3 @@
-[submodule "crates/vg_csg"]
-	path = crates/vg_csg
-	url = https://github.com/GameCult/vg-csg
+[submodule "crates/gamecult_geometry_csg"]
+	path = crates/gamecult_geometry_csg
+	url = https://github.com/GameCult/GameCult.Geometry.Csg
diff --git a/AGENTS.md b/AGENTS.md
index 2b74df9..facd1c4 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -2,7 +2,7 @@
 
 ## Purpose
 
-VibeGeometry is the repository shell for the `vg-csg` Rust work surface.
+VibeGeometry is the repository shell for the CultGeometry CSG Rust work surface.
 
 The previous scene-generation mission has been deleted from the live tree. Do
 not recreate it unless the user explicitly asks to recover a historical artifact
@@ -19,10 +19,10 @@ domain/tree intent
 
 ## Ownership
 
-- `crates/vg_csg` owns implementation.
+- `crates/gamecult_geometry_csg` owns implementation.
 - The root workspace owns only wiring, submodule state, and very small guidance.
 - If a new domain-tree DSL, selected-cut planner, streaming mesh cache, or
-  frustum query API is needed, start inside `vg-csg`.
+  frustum query API is needed, start inside CultGeometry CSG.
 - Do not add root-level helper runtimes, prompt packs, visual translation
   corpora, or schema scaffolds.
 
@@ -32,14 +32,14 @@ domain/tree intent
 git submodule update --init --recursive
 cargo test
 cargo clippy --all-targets --all-features
-cargo run -p vg_csg --release --example csg_perf_fixture
+cargo run -p gamecult-geometry-csg --release --example csg_perf_fixture
 ```
 
 ## Discipline
 
 - Keep the runtime path legible: input tree, selected cut, brush/CSG lowering,
   emitted triangles, and timing evidence.
-- Prefer tests and performance receipts inside `vg-csg` over root-level notes.
+- Prefer tests and performance receipts inside CultGeometry CSG over root-level notes.
 - Preserve exact parity only for public behavior the crate claims to mirror.
 - RealtimeCSG is a reference seam, not an idol.
 - Do not let historical scene-generation work become a live dependency again.
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..640c1a1
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,3 @@
+Repository doctrine for this project lives in AGENTS.md, shared with Codex.
+
+@AGENTS.md
diff --git a/Cargo.lock b/Cargo.lock
index 7dcb9a3..dbab116 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -326,6 +326,17 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "gamecult-geometry-csg"
+version = "0.1.0"
+dependencies = [
+ "approx",
+ "bevy_math",
+ "rmp-serde",
+ "serde",
+ "sha2",
+]
+
 [[package]]
 name = "generic-array"
 version = "0.14.7"
@@ -889,17 +900,6 @@ version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
-[[package]]
-name = "vg_csg"
-version = "0.1.0"
-dependencies = [
- "approx",
- "bevy_math",
- "rmp-serde",
- "serde",
- "sha2",
-]
-
 [[package]]
 name = "wasip2"
 version = "1.0.3+wasi-0.2.9"
diff --git a/Cargo.toml b/Cargo.toml
index bed690a..71cda02 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,3 +1,3 @@
 [workspace]
-members = ["crates/vg_csg"]
+members = ["crates/gamecult_geometry_csg"]
 resolver = "3"
diff --git a/README.md b/README.md
index 3efbdaf..178a302 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # VibeGeometry
 
-VibeGeometry is now the working shell around `vg-csg`.
+VibeGeometry is the historical shell around **CultGeometry CSG**, whose clean
+package identity is `GameCult.Geometry.Csg`.
 
 The previous scene-generation research era is gone from the live tree. It can
 stay in git history, where failed experiments are useful without being allowed
@@ -17,17 +18,17 @@ domain/tree intent
 
 The actual work surface is the Rust crate at:
 
-- `crates/vg_csg`
-- upstream: `https://github.com/GameCult/vg-csg`
+- `crates/gamecult_geometry_csg`
+- upstream: `https://github.com/GameCult/GameCult.Geometry.Csg`
 
 ## What This Repo Owns
 
-- The `vg-csg` submodule pointer.
+- The CultGeometry CSG submodule pointer.
 - A minimal Rust workspace that builds that crate.
 - Thin operating notes that keep future work pointed at runtime CSG, not legacy
   scene-generation scaffolding.
 
-## What `vg-csg` Owns
+## What CultGeometry CSG Owns
 
 - Brush and CSG tree APIs.
 - RealtimeCSG-shaped public seams where useful.
@@ -42,9 +43,9 @@ The actual work surface is the Rust crate at:
 git submodule update --init --recursive
 cargo test
 cargo clippy --all-targets --all-features
-cargo run -p vg_csg --release --example csg_perf_fixture
+cargo run -p gamecult-geometry-csg --release --example csg_perf_fixture
 ```
 
-If a future task needs domain-tree DSL work, put it in `vg-csg` unless there is
+If a future task needs domain-tree DSL work, put it in CultGeometry CSG unless there is
 a proven reason it must live outside the crate. The default answer is simple:
 the geometry machine belongs where the geometry machine runs.
diff --git a/crates/gamecult_geometry_csg b/crates/gamecult_geometry_csg
new file mode 160000
index 0000000..b476a05
--- /dev/null
+++ b/crates/gamecult_geometry_csg
@@ -0,0 +1 @@
+Subproject commit b476a05eb5ea93ea86f44b09892e83f4bf9499b0
diff --git a/crates/vg_csg b/crates/vg_csg
deleted file mode 160000
index a3197f4..0000000
--- a/crates/vg_csg
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit a3197f413997f90fb53c609274e025d58fadc31b
diff --git a/state/branches.json b/state/branches.json
deleted file mode 100644
index fe51488..0000000
--- a/state/branches.json
+++ /dev/null
@@ -1 +0,0 @@
-[]
diff --git a/state/map.yaml b/state/map.yaml
index e3e59b1..6029563 100644
--- a/state/map.yaml
+++ b/state/map.yaml
@@ -1,22 +1,21 @@
 experiment:
   name: VibeGeometry
   status: runtime_csg_shell
-  phase: vg_csg_focus
+  phase: cultgeometry_csg_focus
   premise: >
-    VibeGeometry is now the thin repository shell around the `vg-csg` Rust
-    work surface. Historical scene-generation research machinery has been
-    removed from the live tree.
+    VibeGeometry is the thin historical shell around the CultGeometry CSG Rust
+    work surface, whose clean package identity is GameCult.Geometry.Csg.
 
 mission:
   primary: >
     Build a fast runtime CSG machine capable of lowering domain/tree intent into
     an LOD-aware CSG hierarchy and emitting triangle/collider output for a
     camera or frustum query in milliseconds.
-  work_surface: crates/vg_csg
+  work_surface: crates/gamecult_geometry_csg
 
 hard_boundaries:
   - Do not rebuild the historical scene-generation pipeline in this repo.
-  - Put implementation in `crates/vg_csg` unless a task proves a root-level
+  - Put implementation in `crates/gamecult_geometry_csg` unless a task proves a root-level
     surface is necessary.
   - Preserve exact parity only for public RealtimeCSG-style behavior the crate
     explicitly claims to mirror.
@@ -25,25 +24,25 @@ hard_boundaries:
 
 live_architecture:
   pipeline:
-    - Domain or tree intent enters `vg-csg`.
+    - Domain or tree intent enters CultGeometry CSG.
     - The runtime chooses an LOD-aware selected cut for the requested view,
       budget, dirty state, or output scope.
     - The selected cut lowers to CSG/brush operations.
     - The crate emits triangle and collider output plus receipt/timing evidence.
   root:
     - Minimal Cargo workspace.
-    - `crates/vg_csg` git submodule.
+    - `crates/gamecult_geometry_csg` git submodule.
     - Minimal README/AGENTS/state pointers.
 
 current_status:
   summary: >
-    Root-level scene-generation surfaces have been deleted. `vg-csg` is the live
+    Root-level scene-generation surfaces have been deleted. CultGeometry CSG is the live
     work surface for future domain-tree, LOD CSG, selected-cut, and triangle
     emission work.
   next_action: >
-    Continue inside `crates/vg_csg`: define the first LOD/query contract for
+    Continue inside `crates/gamecult_geometry_csg`: define the first LOD/query contract for
     selected CSG output rather than adding new root scaffolding.
 
 remotes:
   vibegeometry: https://github.com/GameCult/VibeGeometry
-  vg_csg: https://github.com/GameCult/vg-csg
+  gamecult_geometry_csg: https://github.com/GameCult/GameCult.Geometry.Csg
diff --git a/state/scratch.md b/state/scratch.md
deleted file mode 100644
index 718c9b4..0000000
--- a/state/scratch.md
+++ /dev/null
@@ -1,6 +0,0 @@
-# Scratch
-
-Current live cut: `vg-csg` owns the work surface.
-
-Do not rehydrate old scene-generation plans from memory. The live tree has been
-intentionally reduced to a Rust CSG workspace shell.