diff --git a/compiler/forget/packages/playground/components/Editor/CompilerFlagsEditor.tsx b/compiler/forget/packages/playground/components/Editor/CompilerFlagsEditor.tsx
deleted file mode 100644
index 69f245ae66..0000000000
--- a/compiler/forget/packages/playground/components/Editor/CompilerFlagsEditor.tsx
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright (c) Facebook, Inc. and its affiliates.
- */
-import clsx from "clsx";
-import type { ForgetCompilerFlags } from "../../lib/compilerDriver";
-import { useStore, useStoreDispatch } from "../StoreContext";
-
-// TODO: Allow collapsing the compiler options editor
-export default function CompilerFlagsEditor() {
-  const store = useStore();
-  const dispatch = useStoreDispatch();
-
-  return (
-    <div className="flex flex-col gap-2 px-5 py-4 border-t border-gray-200">
-      <div>
-        <h3 className="font-medium">Compiler Options</h3>
-      </div>
-      <div className="flex flex-col">
-        {Object.keys(store.compilerFlags).map((f) => {
-          const flag = f as keyof ForgetCompilerFlags;
-          const isChecked = store.compilerFlags[flag];
-
-          return (
-            <label key={flag} className="flex gap-1.5 text-base">
-              <input
-                type="checkbox"
-                checked={isChecked}
-                onChange={(e) =>
-                  dispatch({
-                    type: "setCompilerFlag",
-                    payload: { flag, value: e.target.checked },
-                  })
-                }
-              />
-              <span
-                className={clsx("text-gray-500", { "text-black": isChecked })}
-              >
-                {flag}
-              </span>
-            </label>
-          );
-        })}
-      </div>
-    </div>
-  );
-}
diff --git a/compiler/forget/packages/playground/components/Editor/HIRTabContent.tsx b/compiler/forget/packages/playground/components/Editor/HIRTabContent.tsx
deleted file mode 100644
index c0f60d7d4f..0000000000
--- a/compiler/forget/packages/playground/components/Editor/HIRTabContent.tsx
+++ /dev/null
@@ -1,207 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-import clsx from "clsx";
-
-import { HIR } from "babel-plugin-react-forget";
-import { useState } from "react";
-import generate from "@babel/generator";
-import prettier from "prettier";
-import prettierParserBabel from "prettier/parser-babel";
-
-const {
-  parseFunctions,
-  Environment,
-  enterSSA,
-  eliminateRedundantPhi,
-  inferReferenceEffects,
-  inferMutableRanges,
-  leaveSSA,
-  lower,
-  printHIR,
-  codegen,
-} = HIR;
-
-export default function HIRTabContent({ source }: { source: string }) {
-  const astFunctions = parseFunctions(source);
-
-  const [flags, setFlags] = useState({
-    codegen: true,
-    eliminateRedundantPhi: true,
-    inferReferenceEffects: true,
-    inferMutableRanges: true,
-    leaveSSA: true,
-  });
-
-  return (
-    <div className="flex flex-col h-full">
-      <div className="flex-1">
-        {astFunctions.map((func, index): React.ReactNode => {
-          let body;
-          try {
-            const env = new Environment();
-            const ir = lower(func, env);
-            enterSSA(ir, env);
-            if (flags.eliminateRedundantPhi) {
-              eliminateRedundantPhi(ir);
-            }
-            if (flags.inferReferenceEffects) {
-              inferReferenceEffects(ir);
-            }
-            if (flags.inferMutableRanges) {
-              inferMutableRanges(ir);
-            }
-            if (flags.leaveSSA) {
-              leaveSSA(ir);
-            }
-
-            if (flags.codegen) {
-              const ast = codegen(ir);
-              const generated = generate(
-                ast,
-                {
-                  sourceMaps: true,
-                  sourceFileName: "input.js",
-                },
-                source
-              );
-              const formatted = prettier.format(generated.code, {
-                semi: true,
-                parser: "babel",
-                plugins: [prettierParserBabel],
-              });
-              const sourceMapUrl = getSourceMapUrl(
-                generated.code,
-                JSON.stringify(generated.map)
-              );
-              body = (
-                <>
-                  <pre>{formatted}</pre>
-                  {sourceMapUrl && (
-                    <iframe
-                      src={sourceMapUrl}
-                      className="w-full h-96"
-                      title="Generated Code"
-                    />
-                  )}
-                </>
-              );
-            } else {
-              body = <pre>{printHIR(ir.body)}</pre>;
-            }
-          } catch (e: any) {
-            body = <div>error: ${e.toString()}</div>;
-          }
-          const name = func.node.id?.name ?? "anonymous";
-          return (
-            <div key={index} className="px-2 py-4 border-b">
-              <h3 className="mb-2 font-medium">Function: {name}</h3>
-              {body}
-            </div>
-          );
-        })}
-      </div>
-      <CompilerFlagsEditor flags={flags} setFlags={setFlags} />
-    </div>
-  );
-}
-
-function utf16ToUTF8(s: string): string {
-  return unescape(encodeURIComponent(s));
-}
-
-function getSourceMapUrl(code: string, map: string): string | null {
-  code = utf16ToUTF8(code);
-  map = utf16ToUTF8(map);
-  return `https://evanw.github.io/source-map-visualization/#${btoa(
-    `${code.length}\0${code}${map.length}\0${map}`
-  )}`;
-}
-
-type Flags = {
-  eliminateRedundantPhi: boolean;
-  inferReferenceEffects: boolean;
-  inferMutableRanges: boolean;
-  leaveSSA: boolean;
-  codegen: boolean;
-};
-
-function CompilerFlagsEditor({
-  flags,
-  setFlags,
-}: {
-  flags: Flags;
-  setFlags: (flags: Flags) => void;
-}) {
-  return (
-    <div className="flex flex-col gap-2 px-5 py-4 border-t border-gray-200">
-      <h3 className="font-medium">Compiler Options</h3>
-      <div className="flex flex-col">
-        <LabeledCheckbox
-          label="Eliminate Redundant Phi"
-          value={flags.eliminateRedundantPhi}
-          onChange={(eliminateRedundantPhi) => {
-            setFlags({ ...flags, eliminateRedundantPhi });
-          }}
-        />
-        <LabeledCheckbox
-          label="Infer Reference Effects"
-          value={flags.inferReferenceEffects}
-          onChange={(inferReferenceEffects) => {
-            setFlags({ ...flags, inferReferenceEffects });
-          }}
-        />
-        <LabeledCheckbox
-          label="Infer Mutable Ranges"
-          value={flags.inferMutableRanges}
-          onChange={(inferMutableRanges) => {
-            setFlags({ ...flags, inferMutableRanges });
-          }}
-        />
-        <LabeledCheckbox
-          label="Leave SSA"
-          value={flags.leaveSSA}
-          onChange={(leaveSSA) => {
-            setFlags({ ...flags, leaveSSA });
-          }}
-        />
-        <LabeledCheckbox
-          label="Codegen"
-          value={flags.codegen}
-          onChange={(codegen) => {
-            setFlags({ ...flags, codegen });
-          }}
-        />
-      </div>
-    </div>
-  );
-}
-
-function LabeledCheckbox({
-  label,
-  value,
-  onChange,
-}: {
-  label: string;
-  value: boolean;
-  onChange: (value: boolean) => void;
-}) {
-  return (
-    <label className="flex gap-1.5 text-base">
-      <input
-        type="checkbox"
-        checked={value}
-        onChange={(e) => {
-          onChange(e.target.checked);
-        }}
-      />
-      <span className={clsx({ "text-gray-500": !value, "text-black": value })}>
-        {label}
-      </span>
-    </label>
-  );
-}
diff --git a/compiler/forget/packages/playground/components/Editor/Output.tsx b/compiler/forget/packages/playground/components/Editor/Output.tsx
index 002bb6a7fc..2530d77ccf 100644
--- a/compiler/forget/packages/playground/components/Editor/Output.tsx
+++ b/compiler/forget/packages/playground/components/Editor/Output.tsx
@@ -5,21 +5,28 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import TabbedWindow from "../TabbedWindow";
+import generate from "@babel/generator";
 import MonacoEditor from "@monaco-editor/react";
-import {
-  CompilerOutputs,
-  OutputKind,
-  stringifyCompilerOutputs,
-  type Diagnostic,
-} from "babel-plugin-react-forget";
-import { memo, useEffect, useMemo } from "react";
-import compile from "../../lib/compilerDriver";
+import { Diagnostic, HIR, OutputKind } from "babel-plugin-react-forget";
+import prettier from "prettier";
+import prettierParserBabel from "prettier/parser-babel";
+import { memo } from "react";
 import type { Store } from "../../lib/stores";
-import GraphView from "../GraphView";
+import TabbedWindow from "../TabbedWindow";
 import { monacoOptions } from "./monacoOptions";
-import HIRTabContent from "./HIRTabContent";
 
+const {
+  parseFunctions,
+  Environment,
+  enterSSA,
+  eliminateRedundantPhi,
+  inferReferenceEffects,
+  inferMutableRanges,
+  leaveSSA,
+  lower,
+  printHIR,
+  codegen,
+} = HIR;
 const MemoizedOutput = memo(Output);
 
 export default MemoizedOutput;
@@ -29,55 +36,141 @@ type Props = {
   updateDiagnostics: (newDiags: Diagnostic[]) => void;
 };
 
-function Output({ store, updateDiagnostics }: Props) {
-  const { outputs, diagnostics } = useMemo(
-    () => compile(store.source, store.compilerFlags),
-    [store]
-  );
-  useEffect(() => {
-    updateDiagnostics(diagnostics);
-  }, [diagnostics, updateDiagnostics]);
-  return (
-    <TabbedWindow
-      defaultTab="HIR"
-      tabs={{
-        IR: <TextTabContent outputs={outputs} kind={OutputKind.IR} />,
-        HIR: <HIRTabContent source={store.source} />,
-        CFG: <TextTabContent outputs={outputs} kind={OutputKind.CFG} />,
-        ValGraph: (
-          <GraphTabContent outputs={outputs} kind={OutputKind.ValGraph} />
-        ),
-        SCCGraph: (
-          <GraphTabContent outputs={outputs} kind={OutputKind.SCCGraph} />
-        ),
-        RedGraph: (
-          <GraphTabContent outputs={outputs} kind={OutputKind.RedGraph} />
-        ),
-        LIR: <TextTabContent outputs={outputs} kind={OutputKind.LIR} />,
-        JS: <TextTabContent outputs={outputs} kind={OutputKind.JS} />,
-      }}
-    />
-  );
+// TODO(gsn: Update diagnostics ƒrom HIR output
+function Output({ store }: Props) {
+  const astFunctions = parseFunctions(store.source);
+  if (astFunctions.length === 0) {
+    return <div></div>;
+  }
+
+  try {
+    // TODO: Handle multiple functions
+    const func = astFunctions[0];
+    const env = new Environment();
+    const ir = lower(func, env);
+
+    const hirOutput = printHIR(ir.body);
+
+    enterSSA(ir, env);
+    const ssaOutput = printHIR(ir.body);
+
+    eliminateRedundantPhi(ir);
+    const eliminateRedundantPhiOutput = printHIR(ir.body);
+
+    inferReferenceEffects(ir);
+    const inferReferenceEffectsOutput = printHIR(ir.body);
+
+    inferMutableRanges(ir);
+    const inferMutableRangesOutput = printHIR(ir.body);
+
+    leaveSSA(ir);
+    const leaveSSAOutput = printHIR(ir.body);
+
+    codegen(ir);
+    const ast = codegen(ir);
+    const generated = generate(
+      ast,
+      {
+        sourceMaps: true,
+        sourceFileName: "input.js",
+      },
+      store.source
+    );
+    const sourceMapUrl = getSourceMapUrl(
+      generated.code,
+      JSON.stringify(generated.map)
+    );
+    const codegenOutput = prettier.format(generated.code, {
+      semi: true,
+      parser: "babel",
+      plugins: [prettierParserBabel],
+    });
+    return (
+      <TabbedWindow
+        defaultTab="HIR"
+        tabs={{
+          HIR: (
+            <TextTabContent
+              output={hirOutput}
+              kind={OutputKind.IR}
+            ></TextTabContent>
+          ),
+          SSA: (
+            <TextTabContent
+              output={ssaOutput}
+              kind={OutputKind.IR}
+            ></TextTabContent>
+          ),
+          EliminateRedundantPhi: (
+            <TextTabContent
+              output={eliminateRedundantPhiOutput}
+              kind={OutputKind.IR}
+            ></TextTabContent>
+          ),
+          InferReferenceEffects: (
+            <TextTabContent
+              output={inferReferenceEffectsOutput}
+              kind={OutputKind.IR}
+            ></TextTabContent>
+          ),
+          InferMutableRanges: (
+            <TextTabContent
+              output={inferMutableRangesOutput}
+              kind={OutputKind.IR}
+            ></TextTabContent>
+          ),
+          LeaveSSA: (
+            <TextTabContent
+              output={leaveSSAOutput}
+              kind={OutputKind.IR}
+            ></TextTabContent>
+          ),
+          JS: <TextTabContent output={codegenOutput} kind={OutputKind.JS} />,
+          SourceMap: (
+            <>
+              {" "}
+              {sourceMapUrl && (
+                <iframe
+                  src={sourceMapUrl}
+                  className="w-full h-96"
+                  title="Generated Code"
+                />
+              )}
+            </>
+          ),
+        }}
+      />
+    );
+  } catch (e: any) {
+    return <div>error: ${e.toString()}</div>;
+  }
+}
+
+function utf16ToUTF8(s: string): string {
+  return unescape(encodeURIComponent(s));
+}
+
+function getSourceMapUrl(code: string, map: string): string | null {
+  code = utf16ToUTF8(code);
+  map = utf16ToUTF8(map);
+  return `https://evanw.github.io/source-map-visualization/#${btoa(
+    `${code.length}\0${code}${map.length}\0${map}`
+  )}`;
 }
 
 function TextTabContent({
-  outputs,
+  output,
   kind,
 }: {
-  outputs: CompilerOutputs;
+  output: string;
   kind: OutputKind;
 }) {
-  const prettyOutputs = useMemo(
-    () => stringifyCompilerOutputs(outputs),
-    [outputs]
-  );
-
   return (
     <div className="w-full h-full">
       <MonacoEditor
         path={kind}
         defaultLanguage="javascript"
-        value={prettyOutputs[kind] ?? "(Empty)"}
+        value={output}
         options={{
           ...monacoOptions,
           readOnly: true,
@@ -86,17 +179,3 @@ function TextTabContent({
     </div>
   );
 }
-
-function GraphTabContent({
-  outputs,
-  kind,
-}: {
-  outputs: CompilerOutputs;
-  kind: OutputKind.ValGraph | OutputKind.SCCGraph | OutputKind.RedGraph;
-}) {
-  return (
-    <div className="w-full h-full overflow-auto">
-      <GraphView graphs={outputs[kind]} />
-    </div>
-  );
-}
diff --git a/compiler/forget/packages/playground/components/Editor/index.tsx b/compiler/forget/packages/playground/components/Editor/index.tsx
index be4657098f..96bbc3a15e 100644
--- a/compiler/forget/packages/playground/components/Editor/index.tsx
+++ b/compiler/forget/packages/playground/components/Editor/index.tsx
@@ -21,7 +21,6 @@ import {
   type Store,
 } from "../../lib/stores";
 import { useStore, useStoreDispatch } from "../StoreContext";
-import CompilerFlagsEditor from "./CompilerFlagsEditor";
 import Input from "./Input";
 import Output from "./Output";