diff --git a/packages/app/src/utils/terminal-output-buffer.test.ts b/packages/app/src/utils/terminal-output-buffer.test.ts
deleted file mode 100644
index 8674ae723..000000000
--- a/packages/app/src/utils/terminal-output-buffer.test.ts
+++ /dev/null
@@ -1,42 +0,0 @@
-import { describe, expect, it } from "vitest";
-
-import {
-  appendTerminalOutputBuffer,
-  createTerminalOutputBuffer,
-  readTerminalOutputBuffer,
-} from "./terminal-output-buffer";
-
-describe("terminal-output-buffer", () => {
-  it("keeps appended text within max chars without rebuilding from scratch", () => {
-    const buffer = createTerminalOutputBuffer();
-
-    appendTerminalOutputBuffer({ buffer, text: "abc", maxChars: 5 });
-    appendTerminalOutputBuffer({ buffer, text: "de", maxChars: 5 });
-
-    expect(readTerminalOutputBuffer({ buffer })).toBe("abcde");
-
-    appendTerminalOutputBuffer({ buffer, text: "f", maxChars: 5 });
-    expect(readTerminalOutputBuffer({ buffer })).toBe("bcdef");
-
-    appendTerminalOutputBuffer({ buffer, text: "gh", maxChars: 5 });
-    expect(readTerminalOutputBuffer({ buffer })).toBe("defgh");
-  });
-
-  it("ignores empty appends and preserves current content", () => {
-    const buffer = createTerminalOutputBuffer();
-    appendTerminalOutputBuffer({ buffer, text: "hello", maxChars: 10 });
-    appendTerminalOutputBuffer({ buffer, text: "", maxChars: 10 });
-
-    expect(readTerminalOutputBuffer({ buffer })).toBe("hello");
-  });
-
-  it("handles large overflow by trimming entire leading segments", () => {
-    const buffer = createTerminalOutputBuffer();
-
-    appendTerminalOutputBuffer({ buffer, text: "12345", maxChars: 8 });
-    appendTerminalOutputBuffer({ buffer, text: "6789", maxChars: 8 });
-    appendTerminalOutputBuffer({ buffer, text: "ABCDEF", maxChars: 8 });
-
-    expect(readTerminalOutputBuffer({ buffer })).toBe("89ABCDEF");
-  });
-});
diff --git a/packages/app/src/utils/terminal-output-buffer.ts b/packages/app/src/utils/terminal-output-buffer.ts
deleted file mode 100644
index 4495f33e3..000000000
--- a/packages/app/src/utils/terminal-output-buffer.ts
+++ /dev/null
@@ -1,93 +0,0 @@
-export interface TerminalOutputBuffer {
-  segments: string[];
-  startIndex: number;
-  totalChars: number;
-}
-
-const COMPACT_SEGMENT_THRESHOLD = 256;
-
-export function createTerminalOutputBuffer(): TerminalOutputBuffer {
-  return {
-    segments: [],
-    startIndex: 0,
-    totalChars: 0,
-  };
-}
-
-function normalizeMaxChars(input: { maxChars: number }): number {
-  if (!Number.isFinite(input.maxChars)) {
-    return 0;
-  }
-  return Math.max(0, Math.floor(input.maxChars));
-}
-
-function compactTerminalOutputBuffer(input: { buffer: TerminalOutputBuffer }): void {
-  const { buffer } = input;
-  if (buffer.startIndex <= COMPACT_SEGMENT_THRESHOLD) {
-    return;
-  }
-
-  buffer.segments = buffer.segments.slice(buffer.startIndex);
-  buffer.startIndex = 0;
-}
-
-function trimTerminalOutputBufferToMax(input: {
-  buffer: TerminalOutputBuffer;
-  maxChars: number;
-}): void {
-  const { buffer } = input;
-  const maxChars = normalizeMaxChars({ maxChars: input.maxChars });
-
-  while (buffer.totalChars > maxChars) {
-    const leadingSegment = buffer.segments[buffer.startIndex];
-    if (!leadingSegment) {
-      buffer.segments = [];
-      buffer.startIndex = 0;
-      buffer.totalChars = 0;
-      return;
-    }
-
-    const overflowChars = buffer.totalChars - maxChars;
-    if (leadingSegment.length <= overflowChars) {
-      buffer.startIndex += 1;
-      buffer.totalChars -= leadingSegment.length;
-      continue;
-    }
-
-    buffer.segments[buffer.startIndex] = leadingSegment.slice(overflowChars);
-    buffer.totalChars -= overflowChars;
-    break;
-  }
-
-  compactTerminalOutputBuffer({ buffer });
-}
-
-export function appendTerminalOutputBuffer(input: {
-  buffer: TerminalOutputBuffer;
-  text: string;
-  maxChars: number;
-}): void {
-  if (!input.text) {
-    return;
-  }
-
-  input.buffer.segments.push(input.text);
-  input.buffer.totalChars += input.text.length;
-  trimTerminalOutputBufferToMax({
-    buffer: input.buffer,
-    maxChars: input.maxChars,
-  });
-}
-
-export function readTerminalOutputBuffer(input: { buffer: TerminalOutputBuffer }): string {
-  const { buffer } = input;
-  if (buffer.totalChars <= 0) {
-    return "";
-  }
-
-  if (buffer.startIndex === 0) {
-    return buffer.segments.join("");
-  }
-
-  return buffer.segments.slice(buffer.startIndex).join("");
-}