diff --git a/.gitignore b/.gitignore
index 99b6cdf..30f5beb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,7 @@
 /.agent-shell/
-/clayterm.wasm
-/wasm.ts
+/clayterm-layout.wasm
+/clayterm-input.wasm
+/wasm-layout.ts
+/wasm-input.ts
 /build/
 /node_modules/
diff --git a/Makefile b/Makefile
index 1103b8e..90fb527 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: clayterm-layout.wasm clayterm-input.wasm wasm-layout.ts wasm-input.ts
+	@echo "Built clayterm-layout.wasm ($$(wc -c < clayterm-layout.wasm) bytes raw, $$(gzip -c clayterm-layout.wasm | wc -c) bytes gzip)"
+	@echo "Built clayterm-input.wasm  ($$(wc -c < clayterm-input.wasm) bytes raw, $$(gzip -c clayterm-input.wasm | wc -c) bytes gzip)"
+
+clayterm-layout.wasm: $(DEPS)
+	$(CC) $(CFLAGS) $(LAYOUT_LDFLAGS) -o $@ src/module-layout.c
+
+clayterm-input.wasm: $(DEPS)
+	$(CC) $(filter-out -DCLAY_IMPLEMENTATION -DCLAY_WASM, $(CFLAGS)) $(INPUT_LDFLAGS) -o $@ src/module-input.c
+
+wasm-layout.ts: clayterm-layout.wasm
+	deno run --allow-read --allow-write tasks/bundle-wasm.ts clayterm-layout.wasm wasm-layout.ts
 
-wasm.ts: $(TARGET)
-	deno run --allow-read --allow-write tasks/bundle-wasm.ts
+wasm-input.ts: clayterm-input.wasm
+	deno run --allow-read --allow-write tasks/bundle-wasm.ts clayterm-input.wasm wasm-input.ts
 
 clean:
-	rm -f $(TARGET) wasm.ts
+	rm -f clayterm.wasm clayterm-layout.wasm clayterm-input.wasm wasm.ts wasm-layout.ts wasm-input.ts
 
 .PHONY: all clean
diff --git a/deno.json b/deno.json
index 901feb9..71af68c 100644
--- a/deno.json
+++ b/deno.json
@@ -21,11 +21,13 @@
   },
   "exports": {
     ".": "./mod.ts",
+    "./layout": "./layout.ts",
+    "./input": "./input.ts",
     "./validate": "./validate.ts"
   },
   "publish": {
     "include": ["*.ts"],
-    "exclude": ["!wasm.ts"]
+    "exclude": ["!wasm-layout.ts", "!wasm-input.ts"]
   },
   "nodeModulesDir": "auto",
   "fmt": {
diff --git a/input-native.ts b/input-native.ts
index 7ed6d1b..34272b0 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 "./wasm-input.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 da64792..174b949 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 c517974..2cad7e8 100644
--- a/tasks/bundle-wasm.ts
+++ b/tasks/bundle-wasm.ts
@@ -27,7 +27,9 @@ function encodeZ85(data: Uint8Array): string {
   return out.join("");
 }
 
-const wasm = await Deno.readFile("clayterm.wasm");
+const [input = "clayterm.wasm", output = "wasm.ts"] = Deno.args;
+
+const wasm = await Deno.readFile(input);
 
 const compressed = new Uint8Array(
   brotliCompressSync(wasm, {
@@ -50,9 +52,9 @@ const compressed=d(${JSON.stringify(z85)},${compressed.byteLength});
 export const compiled=await WebAssembly.compile(new Uint8Array(brotliDecompressSync(compressed)));
 `;
 
-await Deno.writeTextFile("wasm.ts", source);
+await Deno.writeTextFile(output, source);
 console.log(
-  `wrote wasm.ts (${wasm.length} → ${compressed.byteLength} bytes compressed, ${z85.length} bytes z85, ${
+  `wrote ${output} (${wasm.length} → ${compressed.byteLength} bytes compressed, ${z85.length} bytes z85, ${
     Math.round(z85.length / wasm.length * 100)
   }%)`,
 );
diff --git a/term-native.ts b/term-native.ts
index 40e646d..548344f 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 "./wasm-layout.ts";
 
 export async function createTermNative(
   w: number,