diff --git a/headroom/cli/wrap.py b/headroom/cli/wrap.py
index 846f38a58..d0bc0f76d 100644
--- a/headroom/cli/wrap.py
+++ b/headroom/cli/wrap.py
@@ -1663,6 +1663,34 @@ def _inject_rtk_instructions(file_path: Path, verbose: bool = False) -> bool:
     return True
 
 
+def _remove_rtk_instructions(file_path: Path) -> bool:
+    """Remove Headroom's marker-fenced rtk guidance from an instruction file."""
+    if not file_path.exists():
+        return False
+
+    content = file_path.read_text(encoding="utf-8")
+    end_marker = "<!-- /headroom:rtk-instructions -->"
+    start = content.find(_RTK_MARKER)
+    if start < 0:
+        return False
+
+    end = content.find(end_marker, start)
+    if end < 0:
+        return False
+    end += len(end_marker)
+    prefix = content[:start].rstrip()
+    suffix = content[end:].lstrip("\r\n")
+    cleaned = "\n\n".join(part for part in (prefix, suffix) if part)
+    if cleaned:
+        cleaned = cleaned.rstrip() + "\n"
+
+    if cleaned:
+        file_path.write_text(cleaned, encoding="utf-8")
+    else:
+        file_path.unlink()
+    return True
+
+
 def _inject_memory_mcp_config(db_path: str, user_id: str) -> None:
     """Register headroom memory as an MCP server in Codex's config.toml.
 
@@ -3632,6 +3660,26 @@ def copilot(
     )
 
 
+# =============================================================================
+# GitHub Copilot CLI (unwrap)
+# =============================================================================
+
+
+@unwrap.command("copilot")
+@click.option("--port", "-p", default=8787, type=int, help="Proxy port (default: 8787)")
+@click.option("--no-stop-proxy", is_flag=True, help="Do not stop the local Headroom proxy")
+def unwrap_copilot(port: int, no_stop_proxy: bool) -> None:
+    """Undo durable setup from ``headroom wrap copilot``."""
+    instructions = Path.cwd() / ".github" / "copilot-instructions.md"
+    if _remove_rtk_instructions(instructions):
+        click.echo("  Removed Headroom rtk instructions from Copilot.")
+    else:
+        click.echo("  No Headroom rtk instructions found for Copilot.")
+
+    if not no_stop_proxy:
+        _echo_unwrap_proxy_stop_status(_stop_local_proxy_for_unwrap(port), port)
+
+
 # =============================================================================
 # OpenAI Codex CLI
 # =============================================================================
diff --git a/tests/test_cli/test_wrap_copilot.py b/tests/test_cli/test_wrap_copilot.py
index f42903e5e..568e0aac2 100644
--- a/tests/test_cli/test_wrap_copilot.py
+++ b/tests/test_cli/test_wrap_copilot.py
@@ -668,6 +668,117 @@ def test_wrap_copilot_fails_when_binary_missing(
     assert "Install GitHub Copilot CLI" in result.output
 
 
+def test_unwrap_copilot_removes_rtk_instructions_and_stops_proxy(
+    runner: CliRunner,
+    wrap_modules: tuple[types.ModuleType, click.Group],
+    tmp_path: Path,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    wrap_cli, main = wrap_modules
+    monkeypatch.chdir(tmp_path)
+    instructions = tmp_path / ".github" / "copilot-instructions.md"
+    instructions.parent.mkdir()
+    instructions.write_text(
+        "Keep user guidance.\n\n" + wrap_cli.RTK_INSTRUCTIONS_BLOCK,
+        encoding="utf-8",
+    )
+
+    with patch(
+        "headroom.cli.wrap._stop_local_proxy_for_unwrap",
+        return_value="stopped",
+    ) as stop_proxy:
+        result = runner.invoke(main, ["unwrap", "copilot", "--port", "9999"])
+
+    assert result.exit_code == 0, result.output
+    assert instructions.read_text(encoding="utf-8") == "Keep user guidance.\n"
+    stop_proxy.assert_called_once_with(9999)
+    assert "Removed Headroom rtk instructions from Copilot." in result.output
+    assert "Stopped local Headroom proxy on port 9999" in result.output
+
+
+def test_unwrap_copilot_preserves_instructions_after_rtk_block(
+    runner: CliRunner,
+    wrap_modules: tuple[types.ModuleType, click.Group],
+    tmp_path: Path,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    wrap_cli, main = wrap_modules
+    monkeypatch.chdir(tmp_path)
+    instructions = tmp_path / ".github" / "copilot-instructions.md"
+    instructions.parent.mkdir()
+    instructions.write_text(
+        wrap_cli.RTK_INSTRUCTIONS_BLOCK + "\nKeep trailing guidance.\n",
+        encoding="utf-8",
+    )
+
+    result = runner.invoke(main, ["unwrap", "copilot", "--no-stop-proxy"])
+
+    assert result.exit_code == 0, result.output
+    assert instructions.read_text(encoding="utf-8") == "Keep trailing guidance.\n"
+
+
+def test_unwrap_copilot_leaves_malformed_marker_content_unchanged(
+    runner: CliRunner,
+    wrap_modules: tuple[types.ModuleType, click.Group],
+    tmp_path: Path,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    wrap_cli, main = wrap_modules
+    monkeypatch.chdir(tmp_path)
+    instructions = tmp_path / ".github" / "copilot-instructions.md"
+    instructions.parent.mkdir()
+    content = f"<!-- /headroom:rtk-instructions -->\nKeep user guidance.\n{wrap_cli._RTK_MARKER}\n"
+    instructions.write_text(content, encoding="utf-8")
+
+    result = runner.invoke(main, ["unwrap", "copilot", "--no-stop-proxy"])
+
+    assert result.exit_code == 0, result.output
+    assert instructions.read_text(encoding="utf-8") == content
+    assert "No Headroom rtk instructions found for Copilot." in result.output
+
+
+def test_unwrap_copilot_deletes_generated_only_instruction_file(
+    runner: CliRunner,
+    wrap_modules: tuple[types.ModuleType, click.Group],
+    tmp_path: Path,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    wrap_cli, main = wrap_modules
+    monkeypatch.chdir(tmp_path)
+    instructions = tmp_path / ".github" / "copilot-instructions.md"
+    instructions.parent.mkdir()
+    instructions.write_text(wrap_cli.RTK_INSTRUCTIONS_BLOCK, encoding="utf-8")
+
+    result = runner.invoke(main, ["unwrap", "copilot", "--no-stop-proxy"])
+
+    assert result.exit_code == 0, result.output
+    assert not instructions.exists()
+
+
+@pytest.mark.parametrize("create_user_file", [False, True])
+def test_unwrap_copilot_is_noop_without_managed_instructions(
+    runner: CliRunner,
+    wrap_modules: tuple[types.ModuleType, click.Group],
+    tmp_path: Path,
+    monkeypatch: pytest.MonkeyPatch,
+    create_user_file: bool,
+) -> None:
+    _wrap_cli, main = wrap_modules
+    monkeypatch.chdir(tmp_path)
+    instructions = tmp_path / ".github" / "copilot-instructions.md"
+    if create_user_file:
+        instructions.parent.mkdir()
+        instructions.write_text("Keep user guidance.\n", encoding="utf-8")
+
+    result = runner.invoke(main, ["unwrap", "copilot", "--no-stop-proxy"])
+
+    assert result.exit_code == 0, result.output
+    assert instructions.exists() is create_user_file
+    if create_user_file:
+        assert instructions.read_text(encoding="utf-8") == "Keep user guidance.\n"
+    assert "No Headroom rtk instructions found for Copilot." in result.output
+
+
 # ---------------------------------------------------------------------------
 # Regression suite for #610 — GitHub Copilot endpoint routing per auth mode.
 #