diff --git a/examples/debugging/asyncio_bp.py b/examples/debugging/asyncio_bp.py
index 296dbccb..fc3b222a 100644
--- a/examples/debugging/asyncio_bp.py
+++ b/examples/debugging/asyncio_bp.py
@@ -29,7 +29,7 @@ async def bp_then_error(
     to_trio.send_nowait('start')
 
     # NOTE: what happens here inside the hook needs some refinement..
-    # => seems like it's still `._debug._set_trace()` but
+    # => seems like it's still `.debug._set_trace()` but
     #    we set `Lock.local_task_in_debug = 'sync'`, we probably want
     #    some further, at least, meta-data about the task/actor in debug
     #    in terms of making it clear it's `asyncio` mucking about.
diff --git a/examples/debugging/restore_builtin_breakpoint.py b/examples/debugging/restore_builtin_breakpoint.py
index b591b0f7..65356c85 100644
--- a/examples/debugging/restore_builtin_breakpoint.py
+++ b/examples/debugging/restore_builtin_breakpoint.py
@@ -18,14 +18,14 @@ async def main() -> None:
         assert (
             (pybp_var := os.environ['PYTHONBREAKPOINT'])
             ==
-            'tractor.devx._debug._sync_pause_from_builtin'
+            'tractor.devx.debug._sync_pause_from_builtin'
         )
 
         # TODO: an assert that verifies the hook has indeed been, hooked
         # XD
         assert (
             (pybp_hook := sys.breakpointhook)
-            is not tractor.devx._debug._set_trace
+            is not tractor.devx.debug._set_trace
         )
 
         print(
diff --git a/examples/debugging/sync_bp.py b/examples/debugging/sync_bp.py
index 95472c93..a26a9c54 100644
--- a/examples/debugging/sync_bp.py
+++ b/examples/debugging/sync_bp.py
@@ -6,7 +6,7 @@ import tractor
 
 # TODO: only import these when not running from test harness?
 # can we detect `pexpect` usage maybe?
-# from tractor.devx._debug import (
+# from tractor.devx.debug import (
 #     get_lock,
 #     get_debug_req,
 # )
diff --git a/tests/devx/conftest.py b/tests/devx/conftest.py
index c45265dc..fafa1334 100644
--- a/tests/devx/conftest.py
+++ b/tests/devx/conftest.py
@@ -16,7 +16,7 @@ from pexpect.spawnbase import SpawnBase
 from tractor._testing import (
     mk_cmd,
 )
-from tractor.devx._debug import (
+from tractor.devx.debug import (
     _pause_msg as _pause_msg,
     _crash_msg as _crash_msg,
     _repl_fail_msg as _repl_fail_msg,
@@ -111,7 +111,7 @@ def ctlc(
         # XXX: disable pygments highlighting for auto-tests
         # since some envs (like actions CI) will struggle
         # the the added color-char encoding..
-        from tractor.devx._debug import TractorConfig
+        from tractor.devx.debug import TractorConfig
         TractorConfig.use_pygements = False
 
     yield use_ctlc
diff --git a/tests/devx/test_debugger.py b/tests/devx/test_debugger.py
index 171e983e..5a40caea 100644
--- a/tests/devx/test_debugger.py
+++ b/tests/devx/test_debugger.py
@@ -528,7 +528,7 @@ def test_multi_daemon_subactors(
     # now the root actor won't clobber the bp_forever child
     # during it's first access to the debug lock, but will instead
     # wait for the lock to release, by the edge triggered
-    # ``devx._debug.Lock.no_remote_has_tty`` event before sending cancel messages
+    # ``devx.debug.Lock.no_remote_has_tty`` event before sending cancel messages
     # (via portals) to its underlings B)
 
     # at some point here there should have been some warning msg from
diff --git a/tests/test_infected_asyncio.py b/tests/test_infected_asyncio.py
index 465decca..195ed4cd 100644
--- a/tests/test_infected_asyncio.py
+++ b/tests/test_infected_asyncio.py
@@ -889,7 +889,7 @@ async def manage_file(
 
         # NOTE: turns out you don't even need to sched an aio task
         # since the original issue, even though seemingly was due to
-        # the guest-run being abandoned + a `._debug.pause()` inside
+        # the guest-run being abandoned + a `.debug.pause()` inside
         # `._runtime._async_main()` (which was originally trying to
         # debug the `.lifetime_stack` not closing), IS NOT actually
         # the core issue?
@@ -1101,7 +1101,7 @@ def test_sigint_closes_lifetime_stack(
 #    => completed using `.bestow_portal(task)` inside
 #     `.to_asyncio._run_asyncio_task()` right?
 #   -[ ] translation func to get from `asyncio` task calling to 
-#     `._debug.wait_for_parent_stdin_hijack()` which does root
+#     `.debug.wait_for_parent_stdin_hijack()` which does root
 #     call to do TTY locking.
 #
 def test_sync_breakpoint():
diff --git a/tractor/_context.py b/tractor/_context.py
index e5cce1ec..11075068 100644
--- a/tractor/_context.py
+++ b/tractor/_context.py
@@ -292,7 +292,7 @@ class Context:
     # - `._runtime._invoke()` will check this flag before engaging
     #   the crash handler REPL in such cases where the "callee"
     #   raises the cancellation,
-    # - `.devx._debug.lock_stdio_for_peer()` will set it to `False` if
+    # - `.devx.debug.lock_stdio_for_peer()` will set it to `False` if
     #   the global tty-lock has been configured to filter out some
     #   actors from being able to acquire the debugger lock.
     _enter_debugger_on_cancel: bool = True
@@ -1234,8 +1234,8 @@ class Context:
 
             # ?XXX, should already be set in `._deliver_msg()` right?
             if self._outcome_msg is not Unresolved:
-                # from .devx import _debug
-                # await _debug.pause()
+                # from .devx import debug
+                # await debug.pause()
                 assert self._outcome_msg is outcome_msg
             else:
                 self._outcome_msg = outcome_msg
@@ -2170,7 +2170,7 @@ async def open_context_from_portal(
         #   debugging the tractor-runtime itself using it's
         #   own `.devx.` tooling!
         # 
-        # await _debug.pause()
+        # await debug.pause()
 
         # CASE 2: context was cancelled by local task calling
         # `.cancel()`, we don't raise and the exit block should
@@ -2237,7 +2237,7 @@ async def open_context_from_portal(
         # NOTE: `Context.cancel()` is conversely NEVER CALLED in
         # the `ContextCancelled` "self cancellation absorbed" case
         # handled in the block above ^^^ !!
-        # await _debug.pause()
+        # await debug.pause()
         # log.cancel(
         match scope_err:
             case trio.Cancelled:
@@ -2252,11 +2252,11 @@ async def open_context_from_portal(
         )
 
         if debug_mode():
-            # async with _debug.acquire_debug_lock(portal.actor.uid):
+            # async with debug.acquire_debug_lock(portal.actor.uid):
             #     pass
             # TODO: factor ^ into below for non-root cases?
             #
-            from .devx._debug import maybe_wait_for_debugger
+            from .devx.debug import maybe_wait_for_debugger
             was_acquired: bool = await maybe_wait_for_debugger(
                 # header_msg=(
                 #     'Delaying `ctx.cancel()` until debug lock '
@@ -2319,8 +2319,8 @@ async def open_context_from_portal(
                 raise
 
             # yes this worx!
-            # from .devx import _debug
-            # await _debug.pause()
+            # from .devx import debug
+            # await debug.pause()
 
             # an exception type boxed in a `RemoteActorError`
             # is returned (meaning it was obvi not raised)
@@ -2355,7 +2355,7 @@ async def open_context_from_portal(
         # where the root is waiting on the lock to clear but the
         # child has already cleared it and clobbered IPC.
         if debug_mode():
-            from .devx._debug import maybe_wait_for_debugger
+            from .devx.debug import maybe_wait_for_debugger
             await maybe_wait_for_debugger()
 
         # though it should be impossible for any tasks
diff --git a/tractor/_entry.py b/tractor/_entry.py
index 5f702198..66e64d24 100644
--- a/tractor/_entry.py
+++ b/tractor/_entry.py
@@ -35,7 +35,7 @@ from .log import (
 )
 from . import _state
 from .devx import (
-    _debug,
+    debug,
     pformat,
 )
 from .to_asyncio import run_as_asyncio_guest
@@ -116,7 +116,7 @@ def _trio_main(
     Entry point for a `trio_run_in_process` subactor.
 
     '''
-    _debug.hide_runtime_frames()
+    debug.hide_runtime_frames()
 
     _state._current_actor = actor
     trio_main = partial(
diff --git a/tractor/_root.py b/tractor/_root.py
index 0e945fc0..7dc2cc24 100644
--- a/tractor/_root.py
+++ b/tractor/_root.py
@@ -44,7 +44,7 @@ from ._runtime import (
     # Arbiter as Registry,
     async_main,
 )
-from .devx import _debug
+from .devx import debug
 from . import _spawn
 from . import _state
 from . import log
@@ -67,7 +67,7 @@ from ._exceptions import (
 logger = log.get_logger('tractor')
 
 
-# TODO: stick this in a `@acm` defined in `devx._debug`?
+# TODO: stick this in a `@acm` defined in `devx.debug`?
 # -[ ] also maybe consider making this a `wrapt`-deco to
 #     save an indent level?
 #
@@ -89,7 +89,7 @@ async def maybe_block_bp(
         debug_mode
         and maybe_enable_greenback
         and (
-            maybe_mod := await _debug.maybe_init_greenback(
+            maybe_mod := await debug.maybe_init_greenback(
                 raise_not_found=False,
             )
         )
@@ -99,7 +99,7 @@ async def maybe_block_bp(
             'Enabling `tractor.pause_from_sync()` support!\n'
         )
         os.environ['PYTHONBREAKPOINT'] = (
-            'tractor.devx._debug._sync_pause_from_builtin'
+            'tractor.devx.debug._sync_pause_from_builtin'
         )
         _state._runtime_vars['use_greenback'] = True
         bp_blocked = False
@@ -178,7 +178,7 @@ async def open_root_actor(
 
     hide_tb: bool = True,
 
-    # XXX, proxied directly to `.devx._debug._maybe_enter_pm()`
+    # XXX, proxied directly to `.devx.debug._maybe_enter_pm()`
     # for REPL-entry logic.
     debug_filter: Callable[
         [BaseException|BaseExceptionGroup],
@@ -223,12 +223,12 @@ async def open_root_actor(
                 len(enable_transports) == 1
             ), 'No multi-tpt support yet!'
 
-        _debug.hide_runtime_frames()
+        debug.hide_runtime_frames()
         __tracebackhide__: bool = hide_tb
 
         # attempt to retreive ``trio``'s sigint handler and stash it
         # on our debugger lock state.
-        _debug.DebugStatus._trio_handler = signal.getsignal(signal.SIGINT)
+        debug.DebugStatus._trio_handler = signal.getsignal(signal.SIGINT)
 
         # mark top most level process as root actor
         _state._runtime_vars['_is_root'] = True
@@ -283,7 +283,7 @@ async def open_root_actor(
 
             # expose internal debug module to every actor allowing for
             # use of ``await tractor.pause()``
-            enable_modules.append('tractor.devx._debug')
+            enable_modules.append('tractor.devx.debug')
 
             # if debug mode get's enabled *at least* use that level of
             # logging for some informative console prompts.
@@ -465,7 +465,7 @@ async def open_root_actor(
                     # TODO, in beginning to handle the subsubactor with
                     # crashed grandparent cases..
                     #
-                    # was_locked: bool = await _debug.maybe_wait_for_debugger(
+                    # was_locked: bool = await debug.maybe_wait_for_debugger(
                     #     child_in_debug=True,
                     # )
                     # XXX NOTE XXX see equiv note inside
@@ -473,7 +473,7 @@ async def open_root_actor(
                     # non-root or root-that-opened-this-mahually case we
                     # wait for the local actor-nursery to exit before
                     # exiting the transport channel handler.
-                    entered: bool = await _debug._maybe_enter_pm(
+                    entered: bool = await debug._maybe_enter_pm(
                         err,
                         api_frame=inspect.currentframe(),
                         debug_filter=debug_filter,
diff --git a/tractor/_rpc.py b/tractor/_rpc.py
index 3fc11db7..a9c3a5c7 100644
--- a/tractor/_rpc.py
+++ b/tractor/_rpc.py
@@ -57,7 +57,7 @@ from ._exceptions import (
     unpack_error,
 )
 from .devx import (
-    _debug,
+    debug,
     add_div,
 )
 from . import _state
@@ -266,7 +266,7 @@ async def _errors_relayed_via_ipc(
 
     # TODO: a debug nursery when in debug mode!
     # async with maybe_open_debugger_nursery() as debug_tn:
-    # => see matching comment in side `._debug._pause()`
+    # => see matching comment in side `.debug._pause()`
     rpc_err: BaseException|None = None
     try:
         yield  # run RPC invoke body
@@ -318,7 +318,7 @@ async def _errors_relayed_via_ipc(
                     'RPC task crashed, attempting to enter debugger\n'
                     f'|_{ctx}'
                 )
-                entered_debug = await _debug._maybe_enter_pm(
+                entered_debug = await debug._maybe_enter_pm(
                     err,
                     api_frame=inspect.currentframe(),
                 )
@@ -462,7 +462,7 @@ async def _invoke(
     ):
         # XXX for .pause_from_sync()` usage we need to make sure
         # `greenback` is boostrapped in the subactor!
-        await _debug.maybe_init_greenback()
+        await debug.maybe_init_greenback()
 
     # TODO: possibly a specially formatted traceback
     # (not sure what typing is for this..)?
@@ -751,7 +751,7 @@ async def _invoke(
                 and 'Cancel scope stack corrupted' in scope_error.args[0]
             ):
                 log.exception('Cancel scope stack corrupted!?\n')
-                # _debug.mk_pdb().set_trace()
+                # debug.mk_pdb().set_trace()
 
             # always set this (child) side's exception as the
             # local error on the context
@@ -779,7 +779,7 @@ async def _invoke(
 
             # don't pop the local context until we know the
             # associated child isn't in debug any more
-            await _debug.maybe_wait_for_debugger()
+            await debug.maybe_wait_for_debugger()
             ctx: Context = actor._contexts.pop((
                 chan.uid,
                 cid,
@@ -983,7 +983,7 @@ async def process_messages(
                         # XXX NOTE XXX don't start entire actor
                         # runtime cancellation if this actor is
                         # currently in debug mode!
-                        pdb_complete: trio.Event|None = _debug.DebugStatus.repl_release
+                        pdb_complete: trio.Event|None = debug.DebugStatus.repl_release
                         if pdb_complete:
                             await pdb_complete.wait()
 
diff --git a/tractor/_runtime.py b/tractor/_runtime.py
index 39ac3309..f71cc8b6 100644
--- a/tractor/_runtime.py
+++ b/tractor/_runtime.py
@@ -96,7 +96,7 @@ from ._exceptions import (
     MsgTypeError,
     unpack_error,
 )
-from .devx import _debug
+from .devx import debug
 from ._discovery import get_registry
 from ._portal import Portal
 from . import _state
@@ -220,7 +220,7 @@ class Actor:
         self._parent_main_data = _mp_fixup_main._mp_figure_out_main()
 
         # always include debugging tools module
-        enable_modules.append('tractor.devx._debug')
+        enable_modules.append('tractor.devx.debug')
 
         self.enable_modules: dict[str, str] = {}
         for name in enable_modules:
@@ -930,7 +930,7 @@ class Actor:
 
             # kill any debugger request task to avoid deadlock
             # with the root actor in this tree
-            debug_req = _debug.DebugStatus
+            debug_req = debug.DebugStatus
             lock_req_ctx: Context = debug_req.req_ctx
             if (
                 lock_req_ctx
@@ -940,7 +940,7 @@ class Actor:
                 msg += (
                     f'\n'
                     f'-> Cancelling active debugger request..\n'
-                    f'|_{_debug.Lock.repr()}\n\n'
+                    f'|_{debug.Lock.repr()}\n\n'
                     f'|_{lock_req_ctx}\n\n'
                 )
                 # lock_req_ctx._scope.cancel()
@@ -1266,7 +1266,7 @@ async def async_main(
 
     # attempt to retreive ``trio``'s sigint handler and stash it
     # on our debugger state.
-    _debug.DebugStatus._trio_handler = signal.getsignal(signal.SIGINT)
+    debug.DebugStatus._trio_handler = signal.getsignal(signal.SIGINT)
 
     is_registered: bool = False
     try:
@@ -1360,7 +1360,7 @@ async def async_main(
                 # try:
                 #     actor.load_modules()
                 # except ModuleNotFoundError as err:
-                #     _debug.pause_from_sync()
+                #     debug.pause_from_sync()
                 #     import pdbp; pdbp.set_trace()
                 #     raise
 
@@ -1393,7 +1393,7 @@ async def async_main(
                     # tranport address bind errors - normally it's
                     # something silly like the wrong socket-address
                     # passed via a config or CLI Bo
-                    entered_debug: bool = await _debug._maybe_enter_pm(
+                    entered_debug: bool = await debug._maybe_enter_pm(
                         oserr,
                     )
                     if not entered_debug:
@@ -1431,7 +1431,7 @@ async def async_main(
                         waddr = wrap_address(addr)
                         assert waddr.is_valid
                     except AssertionError:
-                        await _debug.pause()
+                        await debug.pause()
 
                     async with get_registry(addr) as reg_portal:
                         for accept_addr in accept_addrs:
@@ -1549,7 +1549,7 @@ async def async_main(
             # prevents any `infected_aio` actor from continuing
             # and any callbacks in the `ls` here WILL NOT be
             # called!!
-            # await _debug.pause(shield=True)
+            # await debug.pause(shield=True)
 
         ls.close()
 
@@ -1562,7 +1562,7 @@ async def async_main(
         #
         # if actor.name == 'brokerd.ib':
         #     with CancelScope(shield=True):
-        #         await _debug.breakpoint()
+        #         await debug.breakpoint()
 
         # Unregister actor from the registry-sys / registrar.
         if (
@@ -1751,7 +1751,7 @@ class Arbiter(Actor):
         waddr: Address = wrap_address(addr)
         if not waddr.is_valid:
             # should never be 0-dynamic-os-alloc
-            await _debug.pause()
+            await debug.pause()
 
         self._registry[uid] = addr
 
diff --git a/tractor/_spawn.py b/tractor/_spawn.py
index 49d14805..a3e3194e 100644
--- a/tractor/_spawn.py
+++ b/tractor/_spawn.py
@@ -34,7 +34,7 @@ from typing import (
 import trio
 from trio import TaskStatus
 
-from .devx._debug import (
+from .devx.debug import (
     maybe_wait_for_debugger,
     acquire_debug_lock,
 )
diff --git a/tractor/_streaming.py b/tractor/_streaming.py
index f9d1e7ef..4683f35d 100644
--- a/tractor/_streaming.py
+++ b/tractor/_streaming.py
@@ -426,8 +426,8 @@ class MsgStream(trio.abc.Channel):
             self._closed = re
 
         # if caught_eoc:
-        #     # from .devx import _debug
-        #     # await _debug.pause()
+        #     # from .devx import debug
+        #     # await debug.pause()
         #     with trio.CancelScope(shield=True):
         #         await rx_chan.aclose()
 
diff --git a/tractor/_supervise.py b/tractor/_supervise.py
index cdf15e19..0a0463dc 100644
--- a/tractor/_supervise.py
+++ b/tractor/_supervise.py
@@ -31,7 +31,7 @@ import warnings
 import trio
 
 
-from .devx._debug import maybe_wait_for_debugger
+from .devx.debug import maybe_wait_for_debugger
 from ._addr import (
     UnwrappedAddress,
     mk_uuid,
diff --git a/tractor/_testing/__init__.py b/tractor/_testing/__init__.py
index bb964ed3..8b906d11 100644
--- a/tractor/_testing/__init__.py
+++ b/tractor/_testing/__init__.py
@@ -26,7 +26,7 @@ import os
 import pathlib
 
 import tractor
-from tractor.devx._debug import (
+from tractor.devx.debug import (
     BoxedMaybeException,
 )
 from .pytest import (
diff --git a/tractor/devx/__init__.py b/tractor/devx/__init__.py
index 7047dbdb..80c6744f 100644
--- a/tractor/devx/__init__.py
+++ b/tractor/devx/__init__.py
@@ -20,7 +20,7 @@ Runtime "developer experience" utils and addons to aid our
 and working with/on the actor runtime.
 
 """
-from ._debug import (
+from .debug import (
     maybe_wait_for_debugger as maybe_wait_for_debugger,
     acquire_debug_lock as acquire_debug_lock,
     breakpoint as breakpoint,
diff --git a/tractor/devx/_stackscope.py b/tractor/devx/_stackscope.py
index ccc46534..23b7c039 100644
--- a/tractor/devx/_stackscope.py
+++ b/tractor/devx/_stackscope.py
@@ -49,7 +49,7 @@ from tractor import (
     _state,
     log as logmod,
 )
-from tractor.devx import _debug
+from tractor.devx import debug
 
 log = logmod.get_logger(__name__)
 
@@ -82,7 +82,7 @@ def dump_task_tree() -> None:
     if (
         current_sigint_handler
         is not
-        _debug.DebugStatus._trio_handler
+        debug.DebugStatus._trio_handler
     ):
         sigint_handler_report: str = (
             'The default `trio` SIGINT handler was replaced?!'
diff --git a/tractor/devx/_debug.py b/tractor/devx/debug/__init__.py
similarity index 100%
rename from tractor/devx/_debug.py
rename to tractor/devx/debug/__init__.py
diff --git a/tractor/ipc/_server.py b/tractor/ipc/_server.py
index e9affccd..2f138b23 100644
--- a/tractor/ipc/_server.py
+++ b/tractor/ipc/_server.py
@@ -43,7 +43,7 @@ from trio import (
     SocketListener,
 )
 
-# from ..devx import _debug
+# from ..devx import debug
 from .._exceptions import (
     TransportClosed,
 )
@@ -107,7 +107,7 @@ async def handle_stream_from_peer(
     server._no_more_peers = trio.Event()  # unset by making new
 
     # TODO, debug_mode tooling for when hackin this lower layer?
-    # with _debug.maybe_open_crash_handler(
+    # with debug.maybe_open_crash_handler(
     #     pdb=True,
     # ) as boxerr:
 
@@ -343,7 +343,7 @@ async def handle_stream_from_peer(
                 #  - is root but `open_root_actor()` was
                 #    entered manually (in which case we do
                 #    the equiv wait there using the
-                #    `devx._debug` sub-sys APIs).
+                #    `devx.debug` sub-sys APIs).
                 not local_nursery._implicit_runtime_started
             ):
                 log.runtime(
@@ -456,8 +456,8 @@ async def handle_stream_from_peer(
                 and
                 _state.is_debug_mode()
             ):
-                from ..devx import _debug
-                pdb_lock = _debug.Lock
+                from ..devx import debug
+                pdb_lock = debug.Lock
                 pdb_lock._blocked.add(uid)
 
                 # TODO: NEEEDS TO BE TESTED!
@@ -492,7 +492,7 @@ async def handle_stream_from_peer(
                                 f'last disconnected child uid: {uid}\n'
                                 f'locking child uid: {pdb_user_uid}\n'
                             )
-                            await _debug.maybe_wait_for_debugger(
+                            await debug.maybe_wait_for_debugger(
                                 child_in_debug=True
                             )
 
diff --git a/tractor/msg/_ops.py b/tractor/msg/_ops.py
index fbbbecff..9a9c9914 100644
--- a/tractor/msg/_ops.py
+++ b/tractor/msg/_ops.py
@@ -608,7 +608,7 @@ async def drain_to_final_msg(
             #
             # -[ ] make sure pause points work here for REPLing
             #   the runtime itself; i.e. ensure there's no hangs!
-            # |_from tractor.devx._debug import pause
+            # |_from tractor.devx.debug import pause
             #   await pause()
 
         # NOTE: we get here if the far end was
diff --git a/tractor/to_asyncio.py b/tractor/to_asyncio.py
index 08b1ed25..6fc7f83e 100644
--- a/tractor/to_asyncio.py
+++ b/tractor/to_asyncio.py
@@ -49,7 +49,7 @@ from tractor._state import (
     _runtime_vars,
 )
 from tractor._context import Unresolved
-from tractor.devx import _debug
+from tractor.devx import debug
 from tractor.log import (
     get_logger,
     StackLevelAdapter,
@@ -479,7 +479,7 @@ def _run_asyncio_task(
     if (
         debug_mode()
         and
-        (greenback := _debug.maybe_import_greenback(
+        (greenback := debug.maybe_import_greenback(
             force_reload=True,
             raise_not_found=False,
         ))
@@ -841,7 +841,7 @@ async def translate_aio_errors(
     except BaseException as _trio_err:
         trio_err = chan._trio_err = _trio_err
         # await tractor.pause(shield=True)  # workx!
-        entered: bool = await _debug._maybe_enter_pm(
+        entered: bool = await debug._maybe_enter_pm(
             trio_err,
             api_frame=inspect.currentframe(),
         )
@@ -1406,7 +1406,7 @@ def run_as_asyncio_guest(
             )
             # XXX make it obvi we know this isn't supported yet!
             assert 0
-            # await _debug.maybe_init_greenback(
+            # await debug.maybe_init_greenback(
             #     force_reload=True,
             # )