diff --git a/.github/workflows/verify.yaml b/.github/workflows/verify.yaml
index 3fd5b3f..bd4ab07 100644
--- a/.github/workflows/verify.yaml
+++ b/.github/workflows/verify.yaml
@@ -38,8 +38,10 @@ jobs:
         with:
           name: clayterm-wasm
           path: |
-            clayterm.wasm
-            wasm.ts
+            layout.wasm
+            input.wasm
+            layout.wasm.ts
+            input.wasm.ts
 
   test-alt-os:
     needs: test
diff --git a/.gitignore b/.gitignore
index 99b6cdf..efab0a5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,7 @@
 /.agent-shell/
-/clayterm.wasm
-/wasm.ts
+/layout.wasm
+/input.wasm
+/layout.wasm.ts
+/input.wasm.ts
 /build/
 /node_modules/
diff --git a/BUILD.md b/BUILD.md
index f7c4782..f31e488 100644
--- a/BUILD.md
+++ b/BUILD.md
@@ -18,10 +18,12 @@ The local source build is driven by `make`.
 
 It generates:
 
-- `clayterm.wasm` — the compiled WebAssembly module built from the C sources
-- `wasm.ts` — a generated TypeScript file derived from `clayterm.wasm`
+- `layout.wasm` — the layout WebAssembly module built from the C sources
+- `input.wasm` — the input WebAssembly module built from the C sources
+- `layout.wasm.ts` — generated TypeScript derived from `layout.wasm`
+- `input.wasm.ts` — generated TypeScript derived from `input.wasm`
 
-`wasm.ts` is generated output, not hand-maintained source.
+These `.ts` files are generated output, not hand-maintained source.
 
 ## Clone the repo with submodules
 
@@ -182,8 +184,10 @@ make
 
 This should produce:
 
-- `clayterm.wasm`
-- `wasm.ts`
+- `layout.wasm`
+- `input.wasm`
+- `layout.wasm.ts`
+- `input.wasm.ts`
 
 For a clean rebuild:
 
@@ -197,7 +201,7 @@ Re-run `make` when:
 
 - you change files under `src/`
 - you update the `clay` submodule
-- `clayterm.wasm` or `wasm.ts` is missing
+- `layout.wasm`, `input.wasm`, `layout.wasm.ts`, or `input.wasm.ts` is missing
 - generated outputs look stale after switching branches or pulling changes
 
 When in doubt, use a clean rebuild:
@@ -247,7 +251,7 @@ make clean && make
 Symptoms may include:
 
 - target-related `clang` errors mentioning `wasm32`
-- linker failures while producing `clayterm.wasm`
+- linker failures while producing the `.wasm` outputs
 
 Recovery:
 
@@ -267,8 +271,8 @@ If the smoke test fails, fix the toolchain first and only then rerun `make`.
 
 Symptoms may include:
 
-- `clayterm.wasm` is missing
-- `wasm.ts` is missing
+- `layout.wasm` or `input.wasm` is missing
+- `layout.wasm.ts` or `input.wasm.ts` is missing
 - you changed `src/` or updated `clay/`, but the generated outputs do not match
 
 Recovery:
diff --git a/Makefile b/Makefile
index 1103b8e..9feb82b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,4 @@
 CC = clang
-TARGET = clayterm.wasm
-SRC = src/module.c
 
 CFLAGS = --target=wasm32 -nostdlib -O2 \
          -ffunction-sections -fdata-sections \
@@ -8,7 +6,13 @@ CFLAGS = --target=wasm32 -nostdlib -O2 \
          -DCLAY_IMPLEMENTATION -DCLAY_WASM \
          -Isrc -I.
 
-EXPORTS = \
+LDFLAGS_COMMON = -Wl,--no-entry \
+                 -Wl,--import-memory \
+                 -Wl,--stack-first \
+                 -Wl,--strip-all \
+                 -Wl,--gc-sections
+
+LAYOUT_EXPORTS = \
   -Wl,--export=__heap_base \
   -Wl,--export=clayterm_size \
   -Wl,--export=init \
@@ -24,7 +28,10 @@ EXPORTS = \
   -Wl,--export=error_count \
   -Wl,--export=error_type \
   -Wl,--export=error_message_length \
-  -Wl,--export=error_message_ptr \
+  -Wl,--export=error_message_ptr
+
+INPUT_EXPORTS = \
+  -Wl,--export=__heap_base \
   -Wl,--export=input_size \
   -Wl,--export=input_init \
   -Wl,--export=input_scan \
@@ -32,27 +39,33 @@ EXPORTS = \
   -Wl,--export=input_event \
   -Wl,--export=input_delay
 
-LDFLAGS = -Wl,--no-entry \
-          -Wl,--import-memory \
-          -Wl,--stack-first \
-          -Wl,--strip-all \
-          -Wl,--gc-sections \
-          -Wl,--undefined=Clay__MeasureText \
-          -Wl,--undefined=Clay__QueryScrollOffset \
-          $(EXPORTS)
+LAYOUT_LDFLAGS = $(LDFLAGS_COMMON) \
+                 -Wl,--undefined=Clay__MeasureText \
+                 -Wl,--undefined=Clay__QueryScrollOffset \
+                 $(LAYOUT_EXPORTS)
 
-all: $(TARGET) wasm.ts
-	@echo "Built $(TARGET) ($$(wc -c < $(TARGET)) bytes raw, $$(gzip -c $(TARGET) | wc -c) bytes gzip)"
+INPUT_LDFLAGS = $(LDFLAGS_COMMON) \
+                $(INPUT_EXPORTS)
 
 DEPS = $(wildcard src/*.c src/*.h)
 
-$(TARGET): $(DEPS)
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(SRC)
+all: layout.wasm input.wasm layout.wasm.ts input.wasm.ts
+	@echo "Built layout.wasm ($$(wc -c < layout.wasm) bytes raw, $$(gzip -c layout.wasm | wc -c) bytes gzip)"
+	@echo "Built input.wasm  ($$(wc -c < input.wasm) bytes raw, $$(gzip -c input.wasm | wc -c) bytes gzip)"
+
+layout.wasm: $(DEPS)
+	$(CC) $(CFLAGS) $(LAYOUT_LDFLAGS) -o $@ src/module-layout.c
+
+input.wasm: $(DEPS)
+	$(CC) $(filter-out -DCLAY_IMPLEMENTATION -DCLAY_WASM, $(CFLAGS)) $(INPUT_LDFLAGS) -o $@ src/module-input.c
+
+layout.wasm.ts: layout.wasm
+	deno run --allow-read --allow-write tasks/bundle-wasm.ts layout.wasm layout.wasm.ts
 
-wasm.ts: $(TARGET)
-	deno run --allow-read --allow-write tasks/bundle-wasm.ts
+input.wasm.ts: input.wasm
+	deno run --allow-read --allow-write tasks/bundle-wasm.ts input.wasm input.wasm.ts
 
 clean:
-	rm -f $(TARGET) wasm.ts
+	rm -f layout.wasm input.wasm layout.wasm.ts input.wasm.ts
 
 .PHONY: all clean
diff --git a/deno.json b/deno.json
index fab9ce2..8d4e7d1 100644
--- a/deno.json
+++ b/deno.json
@@ -19,11 +19,13 @@
   },
   "exports": {
     ".": "./mod.ts",
+    "./layout": "./layout.ts",
+    "./input": "./input.ts",
     "./validate": "./validate.ts"
   },
   "publish": {
     "include": ["*.ts"],
-    "exclude": ["!wasm.ts"]
+    "exclude": ["!layout.wasm.ts", "!input.wasm.ts"]
   },
   "fmt": {
     "exclude": ["clay", "build"]
diff --git a/input-native.ts b/input-native.ts
index 7ed6d1b..11576c9 100644
--- a/input-native.ts
+++ b/input-native.ts
@@ -169,7 +169,7 @@ export interface InputNative {
   delay(st: number): number;
 }
 
-import { compiled } from "./wasm.ts";
+import { compiled } from "./input.wasm.ts";
 
 export async function createInputNative(
   escLatency: number,
@@ -178,14 +178,6 @@ export async function createInputNative(
 
   let instance = await WebAssembly.instantiate(compiled, {
     env: { memory },
-    clay: {
-      measureTextFunction() {},
-      queryScrollOffsetFunction(ret: number) {
-        let v = new DataView(memory.buffer);
-        v.setFloat32(ret, 0, true);
-        v.setFloat32(ret + 4, 0, true);
-      },
-    },
   });
 
   let exports = instance.exports as unknown as {
diff --git a/layout.ts b/layout.ts
new file mode 100644
index 0000000..1fe605e
--- /dev/null
+++ b/layout.ts
@@ -0,0 +1,4 @@
+export * from "./ops.ts";
+export * from "./term.ts";
+export * from "./settings.ts";
+export * from "./termcodes.ts";
diff --git a/src/module-input.c b/src/module-input.c
new file mode 100644
index 0000000..550d698
--- /dev/null
+++ b/src/module-input.c
@@ -0,0 +1,6 @@
+/* module-input.c — input-only compilation unit, no Clay layout engine */
+
+#include "mem.c"
+#include "utf8.c"
+#include "trie.c"
+#include "input.c"
diff --git a/src/module-layout.c b/src/module-layout.c
new file mode 100644
index 0000000..f865f5f
--- /dev/null
+++ b/src/module-layout.c
@@ -0,0 +1,10 @@
+/* module-layout.c — layout-only compilation unit, no input parser */
+
+#include "../clay/clay.h"
+
+#include "mem.c"
+#include "buffer.c"
+#include "cell.c"
+#include "utf8.c"
+#include "wcwidth.c"
+#include "clayterm.c"
diff --git a/tasks/build-npm.ts b/tasks/build-npm.ts
index c31f754..ee417b9 100644
--- a/tasks/build-npm.ts
+++ b/tasks/build-npm.ts
@@ -10,7 +10,12 @@ if (!version) {
 }
 
 await build({
-  entryPoints: ["./mod.ts"],
+  entryPoints: [
+    "./mod.ts",
+    { name: "./layout", path: "./layout.ts" },
+    { name: "./input", path: "./input.ts" },
+    { name: "./validate", path: "./validate.ts" },
+  ],
   outDir,
   shims: {
     deno: false,
diff --git a/tasks/bundle-wasm.ts b/tasks/bundle-wasm.ts
index b6b033d..e990ba2 100644
--- a/tasks/bundle-wasm.ts
+++ b/tasks/bundle-wasm.ts
@@ -1,6 +1,12 @@
 import { encodeBase64 } from "@std/encoding/base64";
 
-const wasm = await Deno.readFile("clayterm.wasm");
+const [input, output] = Deno.args;
+if (!input || !output) {
+  console.error("Usage: bundle-wasm.ts <input.wasm> <output.ts>");
+  Deno.exit(1);
+}
+
+const wasm = await Deno.readFile(input);
 const base64 = encodeBase64(wasm);
 
 const source = `const bin = atob("${base64}");
@@ -9,5 +15,5 @@ for (let i = 0; i < bin.length; i++) bytes[i] = bin.charCodeAt(i);
 export const compiled = await WebAssembly.compile(bytes);
 `;
 
-await Deno.writeTextFile("wasm.ts", source);
-console.log(`wrote wasm.ts (${wasm.length} bytes encoded)`);
+await Deno.writeTextFile(output, source);
+console.log(`wrote ${output} (${wasm.length} bytes encoded)`);
diff --git a/term-native.ts b/term-native.ts
index 40e646d..3ad544b 100644
--- a/term-native.ts
+++ b/term-native.ts
@@ -31,7 +31,7 @@ export interface Native {
   errorMessage(ct: number, index: number): string;
 }
 
-import { compiled } from "./wasm.ts";
+import { compiled } from "./layout.wasm.ts";
 
 export async function createTermNative(
   w: number,