feat(agent): add dimcode persistent Pi terminal harness

[spomichter]

Contribution path

END-112.

Problem

A DimOS coding agent needs to install DimOS, build apps and manage blueprints without requiring a blueprint's LLM client to be running. Users also need an interactive setup and a working terminal entry point.

Solution

Add agent/, packaged as @dimensional/dimcode. A persistent user gateway embeds upstream Pi sessions; dimcode or dimcode tui opens the terminal. First-run setup covers credentials, model, workspace, DimOS install/connection, MCP and the user daemon. Pi supplies coding tools, provider auth and message/tool components. Existing MCP exposes all advertised skills; lifecycle and development work use the existing CLI/Python APIs. Web SDK media connects only for active render consumers.

Normalize MCP images/errors, add exact --run selection and preserve the Python interpreter for restart. Session events carry their origin; bounded terminal snapshots keep large saved histories attachable without modifying model history. No Pi fork or additional DimOS daemon.

The terminal uses Pi's fullscreen layout, scrollable transcript and multiline editor. Memory analysis stays in DimOS: one materialized query supplies native Space/Plot SVGs and selected-frame exports, displayed together in a tool card with clickable panels and /panel N. Every image reaches model context, with per-export source hashes. Saved XYZ results support rotation/zoom with terminal graphics or Braille. Tagged cloud/image frame indexes now render inside the same tool cards with source-timed inline looping. Playback buttons, timelines and play/pause/seek commands are intentionally absent; the agent selects a requested still from the saved frame index. A shared point painter fixes camera/bounds/height scale across clips. GIF exports and timestamped model contact sheets retain original frame indexes; an individual source frame can be requested without repeating the query. Built-in presentation stays restricted to point clouds and images/SVGs; all generic plots/graphs come from DimOS or Python.

Breaking Changes

Existing CLI defaults remain compatible. MCP images use standard image blocks; failed calls set isError. The dimcode socket is internal to the package; restart the gateway when upgrading this prerelease.

How to Test

For the local packaged build: dimcode setup, then dimcode (or dimcode tui). See agent/README.md for the wizard, local tarball install, contributor commands and reproducible E2E flags. npm publication is deferred.

• All 22 enabled harness checks and strict TypeScript pass. After the scrolling and passive-player changes, typecheck/build and all 18 default tests pass (five optional integrations skipped). The new scrolling regression verifies exact visible pixels at multiple positions and widths even when a terminal ignores source-crop controls. Native dimcode was rechecked in Kitty with the Warp compatibility path enabled; native Warp UI behavior still needs user confirmation. This includes onboarding, CLI entry points, auth privacy, session ownership/recovery, large-history reconnect and stale-event rejection during session switching.
• Real unitree-go2 replay + cockpit + Node Web SDK: 12 distinct video frames, 7 full XYZ clouds (33,454–33,568 points, source hashes verified), 16 odometry frames, and zero viewers/subscriptions after consumers close. No physical hardware or model key is needed for this test.
• Actual MCP handlers through the official client and native Node-to-Deno QUIC pass. Real OpenAI terminal turns, local tarball installation and enabled user daemon were exercised. Actual terminal screenshots captured memory overview/selected-frame cards, point clouds and live video. A fresh Go2 memory search evaluated 267 observations; DimOS peaks/significant selected two results, exported through Space, Plot and mosaic. Panel clicks, command selection and resize were exercised in the installed terminal. A separate 1–5 second Go2 memory selection exported 31 cloud frames and 57 camera frames once; previews retained 31/31 clouds and 29/57 images with verified timestamps/hashes. GIF page counts, source colors, stale-file errors, invalid windows, cancellation, player disposal and original-frame selection are covered. The installed terminal was captured playing both clips. The final UI loops the latest clip, including after restore, with no playback controls. A Warp compatibility adapter displays complete image rows, preserving geometry when only part of an image is visible during scrolling.
• Forty focused Python tests and mypy across 1,117 files passed for the underlying DimOS changes; the earlier MCP/blueprint fixtures also passed mypy/ruff.

Linux x64/Node 24 is validated. Physical hardware, arm64, Node 26 and actual subscription OAuth login remain unverified. Video coverage is consecutive JPEG frames, not H.264. The recording E2E is explicitly skipped unless its environment flags are supplied. Previous CI's macOS job failed on missing nix/SocketCanBus dependencies; project coverage delta was -0.06%. Updated CI is pending.

AI assistance

Codex (GPT-6) implemented and validated this change.

Checklist

• I have read and approved the CLA.

[codecov]

❌ 5 Tests Failed:

Tests completed	Failed	Passed	Skipped
5687	5	5682	109

View the full list of 5 ❄️ flaky test(s)

dimos.experimental.memory.test_rust_recorder_e2e::test_cli_recording_uses_existing_binary_for_both_formats[mcap]

Flake rate in main: 48.48% (Passed 17 times, Failed 16 times)

Stack Traces | 0s run time

@pytest.fixture(scope="module")
    def rust_recorder_executable() -> Path:
>       subprocess.run(
            [
                "nix",
                "--extra-experimental-features",
                "nix-command flakes",
                "build",
                "-L",
                ".#dimos-memory-recorder",
                "--no-write-lock-file",
            ],
            cwd=_RUST_PACKAGE,
            check=True,
        )


.../experimental/memory/test_rust_recorder_e2e.py:78: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:548: in run
    with Popen(*popenargs, **kwargs) as process:
        capture_output = False
        check      = True
        input      = None
        kwargs     = {'cwd': PosixPath('.../experimental/memory/rust')}
        popenargs  = (['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...],)
        timeout    = None
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1026: in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
        args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
        bufsize    = -1
        c2pread    = -1
        c2pwrite   = -1
        close_fds  = True
        creationflags = 0
        cwd        = PosixPath('.../experimental/memory/rust')
        encoding   = None
        env        = None
        errors     = None
        errread    = -1
        errwrite   = -1
        executable = None
        extra_groups = None
        gid        = None
        gids       = None
        group      = None
        p2cread    = -1
        p2cwrite   = -1
        pass_fds   = ()
        pipesize   = -1
        preexec_fn = None
        process_group = -1
        restore_signals = True
        self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
        shell      = False
        start_new_session = False
        startupinfo = None
        stderr     = None
        stdin      = None
        stdout     = None
        text       = None
        uid        = None
        umask      = -1
        universal_newlines = None
        user       = None
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
args = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
executable = b'nix', preexec_fn = None, close_fds = True, pass_fds = ()
cwd = PosixPath('.../experimental/memory/rust')
env = None, startupinfo = None, creationflags = 0, shell = False, p2cread = -1
p2cwrite = -1, c2pread = -1, c2pwrite = -1, errread = -1, errwrite = -1
restore_signals = True, gid = None, gids = None, uid = None, umask = -1
start_new_session = False, process_group = -1

    def _execute_child(self, args, executable, preexec_fn, close_fds,
                       pass_fds, cwd, env,
                       startupinfo, creationflags, shell,
                       p2cread, p2cwrite,
                       c2pread, c2pwrite,
                       errread, errwrite,
                       restore_signals,
                       gid, gids, uid, umask,
                       start_new_session, process_group):
        """Execute program (POSIX version)"""
    
        if isinstance(args, (str, bytes)):
            args = [args]
        elif isinstance(args, os.PathLike):
            if shell:
                raise TypeError('path-like args is not allowed when '
                                'shell is true')
            args = [args]
        else:
            args = list(args)
    
        if shell:
            # On Android the default shell is at '....../system/bin/sh'.
            unix_shell = ('....../system/bin/sh' if
                      hasattr(sys, 'getandroidapilevel') else '/bin/sh')
            args = [unix_shell, "-c"] + args
            if executable:
                args[0] = executable
    
        if executable is None:
            executable = args[0]
    
        sys.audit("subprocess.Popen", executable, args, cwd, env)
    
        if (_USE_POSIX_SPAWN
                and os.path.dirname(executable)
                and preexec_fn is None
                and not close_fds
                and not pass_fds
                and cwd is None
                and (p2cread == -1 or p2cread > 2)
                and (c2pwrite == -1 or c2pwrite > 2)
                and (errwrite == -1 or errwrite > 2)
                and not start_new_session
                and process_group == -1
                and gid is None
                and gids is None
                and uid is None
                and umask < 0):
            self._posix_spawn(args, executable, env, restore_signals,
                              p2cread, p2cwrite,
                              c2pread, c2pwrite,
                              errread, errwrite)
            return
    
        orig_executable = executable
    
        # For transferring possible exec failure from child to parent.
        # Data format: "exception name:hex errno:description"
        # Pickle is not used; it is complex and involves memory allocation.
        errpipe_read, errpipe_write = os.pipe()
        # errpipe_write must not be in the standard io 0, 1, or 2 fd range.
        low_fds_to_close = []
        while errpipe_write < 3:
            low_fds_to_close.append(errpipe_write)
            errpipe_write = os.dup(errpipe_write)
        for low_fd in low_fds_to_close:
            os.close(low_fd)
        try:
            try:
                # We must avoid complex work that could involve
                # malloc or free in the child process to avoid
                # potential deadlocks, thus we do all this here.
                # and pass it to fork_exec()
    
                if env is not None:
                    env_list = []
                    for k, v in env.items():
                        k = os.fsencode(k)
                        if b'=' in k:
                            raise ValueError("illegal environment variable name")
                        env_list.append(k + b'=' + os.fsencode(v))
                else:
                    env_list = None  # Use execv instead of execve.
                executable = os.fsencode(executable)
                if os.path.dirname(executable):
                    executable_list = (executable,)
                else:
                    # This matches the behavior of os._execvpe().
                    executable_list = tuple(
                        os.path.join(os.fsencode(dir), executable)
                        for dir in os.get_exec_path(env))
                fds_to_keep = set(pass_fds)
                fds_to_keep.add(errpipe_write)
                self.pid = _fork_exec(
                        args, executable_list,
                        close_fds, tuple(sorted(map(int, fds_to_keep))),
                        cwd, env_list,
                        p2cread, p2cwrite, c2pread, c2pwrite,
                        errread, errwrite,
                        errpipe_read, errpipe_write,
                        restore_signals, start_new_session,
                        process_group, gid, gids, uid, umask,
                        preexec_fn, _USE_VFORK)
                self._child_created = True
            finally:
                # be sure the FD is closed no matter what
                os.close(errpipe_write)
    
            self._close_pipe_fds(p2cread, p2cwrite,
                                 c2pread, c2pwrite,
                                 errread, errwrite)
    
            # Wait for exec to fail or succeed; possibly raising an
            # exception (limited in size)
            errpipe_data = bytearray()
            while True:
                part = os.read(errpipe_read, 50000)
                errpipe_data += part
                if not part or len(errpipe_data) > 50000:
                    break
        finally:
            # be sure the FD is closed no matter what
            os.close(errpipe_read)
    
        if errpipe_data:
            try:
                pid, sts = os.waitpid(self.pid, 0)
                if pid == self.pid:
                    self._handle_exitstatus(sts)
                else:
                    self.returncode = sys.maxsize
            except ChildProcessError:
                pass
    
            try:
                exception_name, hex_errno, err_msg = (
                        errpipe_data.split(b':', 2))
                # The encoding here should match the encoding
                # written in by the subprocess implementations
                # like _posixsubprocess
                err_msg = err_msg.decode()
            except ValueError:
                exception_name = b'SubprocessError'
                hex_errno = b'0'
                err_msg = 'Bad exception data from child: {!r}'.format(
                              bytes(errpipe_data))
            child_exception_type = getattr(
                    builtins, exception_name.decode('ascii'),
                    SubprocessError)
            if issubclass(child_exception_type, OSError) and hex_errno:
                errno_num = int(hex_errno, 16)
                if err_msg == "noexec:chdir":
                    err_msg = ""
                    # The error must be from chdir(cwd).
                    err_filename = cwd
                elif err_msg == "noexec":
                    err_msg = ""
                    err_filename = None
                else:
                    err_filename = orig_executable
                if errno_num != 0:
                    err_msg = os.strerror(errno_num)
                if err_filename is not None:
>                   raise child_exception_type(errno_num, err_msg, err_filename)
E                   FileNotFoundError: [Errno 2] No such file or directory: 'nix'

args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
c2pread    = -1
c2pwrite   = -1
child_exception_type = <class 'OSError'>
close_fds  = True
creationflags = 0
cwd        = PosixPath('.../experimental/memory/rust')
env        = None
env_list   = None
err_filename = 'nix'
err_msg    = 'No such file or directory'
errno_num  = 2
errpipe_data = bytearray(b'OSError:2:')
errpipe_read = 288
errpipe_write = 289
errread    = -1
errwrite   = -1
exception_name = bytearray(b'OSError')
executable = b'nix'
executable_list = (b'.../dimos/dimos/.venv/bin/nix', b'.../cargo/bin/n...r.../_tool/uv/0.12.13/aarch64/nix', b'.../Users/ec2-user/.local/bin/nix', b'.../homebrew/bin/nix', ...)
fds_to_keep = {289}
gid        = None
gids       = None
hex_errno  = bytearray(b'2')
low_fds_to_close = []
orig_executable = 'nix'
p2cread    = -1
p2cwrite   = -1
part       = b''
pass_fds   = ()
pid        = 50333
preexec_fn = None
process_group = -1
restore_signals = True
self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
shell      = False
start_new_session = False
startupinfo = None
sts        = 65280
uid        = None
umask      = -1

../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1955: FileNotFoundError

dimos.experimental.memory.test_rust_recorder_e2e::test_cli_recording_uses_existing_binary_for_both_formats[sqlite]

Flake rate in main: 48.48% (Passed 17 times, Failed 16 times)

Stack Traces | 0s run time

@pytest.fixture(scope="module")
    def rust_recorder_executable() -> Path:
>       subprocess.run(
            [
                "nix",
                "--extra-experimental-features",
                "nix-command flakes",
                "build",
                "-L",
                ".#dimos-memory-recorder",
                "--no-write-lock-file",
            ],
            cwd=_RUST_PACKAGE,
            check=True,
        )


.../experimental/memory/test_rust_recorder_e2e.py:78: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:548: in run
    with Popen(*popenargs, **kwargs) as process:
        capture_output = False
        check      = True
        input      = None
        kwargs     = {'cwd': PosixPath('.../experimental/memory/rust')}
        popenargs  = (['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...],)
        timeout    = None
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1026: in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
        args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
        bufsize    = -1
        c2pread    = -1
        c2pwrite   = -1
        close_fds  = True
        creationflags = 0
        cwd        = PosixPath('.../experimental/memory/rust')
        encoding   = None
        env        = None
        errors     = None
        errread    = -1
        errwrite   = -1
        executable = None
        extra_groups = None
        gid        = None
        gids       = None
        group      = None
        p2cread    = -1
        p2cwrite   = -1
        pass_fds   = ()
        pipesize   = -1
        preexec_fn = None
        process_group = -1
        restore_signals = True
        self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
        shell      = False
        start_new_session = False
        startupinfo = None
        stderr     = None
        stdin      = None
        stdout     = None
        text       = None
        uid        = None
        umask      = -1
        universal_newlines = None
        user       = None
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
args = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
executable = b'nix', preexec_fn = None, close_fds = True, pass_fds = ()
cwd = PosixPath('.../experimental/memory/rust')
env = None, startupinfo = None, creationflags = 0, shell = False, p2cread = -1
p2cwrite = -1, c2pread = -1, c2pwrite = -1, errread = -1, errwrite = -1
restore_signals = True, gid = None, gids = None, uid = None, umask = -1
start_new_session = False, process_group = -1

    def _execute_child(self, args, executable, preexec_fn, close_fds,
                       pass_fds, cwd, env,
                       startupinfo, creationflags, shell,
                       p2cread, p2cwrite,
                       c2pread, c2pwrite,
                       errread, errwrite,
                       restore_signals,
                       gid, gids, uid, umask,
                       start_new_session, process_group):
        """Execute program (POSIX version)"""
    
        if isinstance(args, (str, bytes)):
            args = [args]
        elif isinstance(args, os.PathLike):
            if shell:
                raise TypeError('path-like args is not allowed when '
                                'shell is true')
            args = [args]
        else:
            args = list(args)
    
        if shell:
            # On Android the default shell is at '....../system/bin/sh'.
            unix_shell = ('....../system/bin/sh' if
                      hasattr(sys, 'getandroidapilevel') else '/bin/sh')
            args = [unix_shell, "-c"] + args
            if executable:
                args[0] = executable
    
        if executable is None:
            executable = args[0]
    
        sys.audit("subprocess.Popen", executable, args, cwd, env)
    
        if (_USE_POSIX_SPAWN
                and os.path.dirname(executable)
                and preexec_fn is None
                and not close_fds
                and not pass_fds
                and cwd is None
                and (p2cread == -1 or p2cread > 2)
                and (c2pwrite == -1 or c2pwrite > 2)
                and (errwrite == -1 or errwrite > 2)
                and not start_new_session
                and process_group == -1
                and gid is None
                and gids is None
                and uid is None
                and umask < 0):
            self._posix_spawn(args, executable, env, restore_signals,
                              p2cread, p2cwrite,
                              c2pread, c2pwrite,
                              errread, errwrite)
            return
    
        orig_executable = executable
    
        # For transferring possible exec failure from child to parent.
        # Data format: "exception name:hex errno:description"
        # Pickle is not used; it is complex and involves memory allocation.
        errpipe_read, errpipe_write = os.pipe()
        # errpipe_write must not be in the standard io 0, 1, or 2 fd range.
        low_fds_to_close = []
        while errpipe_write < 3:
            low_fds_to_close.append(errpipe_write)
            errpipe_write = os.dup(errpipe_write)
        for low_fd in low_fds_to_close:
            os.close(low_fd)
        try:
            try:
                # We must avoid complex work that could involve
                # malloc or free in the child process to avoid
                # potential deadlocks, thus we do all this here.
                # and pass it to fork_exec()
    
                if env is not None:
                    env_list = []
                    for k, v in env.items():
                        k = os.fsencode(k)
                        if b'=' in k:
                            raise ValueError("illegal environment variable name")
                        env_list.append(k + b'=' + os.fsencode(v))
                else:
                    env_list = None  # Use execv instead of execve.
                executable = os.fsencode(executable)
                if os.path.dirname(executable):
                    executable_list = (executable,)
                else:
                    # This matches the behavior of os._execvpe().
                    executable_list = tuple(
                        os.path.join(os.fsencode(dir), executable)
                        for dir in os.get_exec_path(env))
                fds_to_keep = set(pass_fds)
                fds_to_keep.add(errpipe_write)
                self.pid = _fork_exec(
                        args, executable_list,
                        close_fds, tuple(sorted(map(int, fds_to_keep))),
                        cwd, env_list,
                        p2cread, p2cwrite, c2pread, c2pwrite,
                        errread, errwrite,
                        errpipe_read, errpipe_write,
                        restore_signals, start_new_session,
                        process_group, gid, gids, uid, umask,
                        preexec_fn, _USE_VFORK)
                self._child_created = True
            finally:
                # be sure the FD is closed no matter what
                os.close(errpipe_write)
    
            self._close_pipe_fds(p2cread, p2cwrite,
                                 c2pread, c2pwrite,
                                 errread, errwrite)
    
            # Wait for exec to fail or succeed; possibly raising an
            # exception (limited in size)
            errpipe_data = bytearray()
            while True:
                part = os.read(errpipe_read, 50000)
                errpipe_data += part
                if not part or len(errpipe_data) > 50000:
                    break
        finally:
            # be sure the FD is closed no matter what
            os.close(errpipe_read)
    
        if errpipe_data:
            try:
                pid, sts = os.waitpid(self.pid, 0)
                if pid == self.pid:
                    self._handle_exitstatus(sts)
                else:
                    self.returncode = sys.maxsize
            except ChildProcessError:
                pass
    
            try:
                exception_name, hex_errno, err_msg = (
                        errpipe_data.split(b':', 2))
                # The encoding here should match the encoding
                # written in by the subprocess implementations
                # like _posixsubprocess
                err_msg = err_msg.decode()
            except ValueError:
                exception_name = b'SubprocessError'
                hex_errno = b'0'
                err_msg = 'Bad exception data from child: {!r}'.format(
                              bytes(errpipe_data))
            child_exception_type = getattr(
                    builtins, exception_name.decode('ascii'),
                    SubprocessError)
            if issubclass(child_exception_type, OSError) and hex_errno:
                errno_num = int(hex_errno, 16)
                if err_msg == "noexec:chdir":
                    err_msg = ""
                    # The error must be from chdir(cwd).
                    err_filename = cwd
                elif err_msg == "noexec":
                    err_msg = ""
                    err_filename = None
                else:
                    err_filename = orig_executable
                if errno_num != 0:
                    err_msg = os.strerror(errno_num)
                if err_filename is not None:
>                   raise child_exception_type(errno_num, err_msg, err_filename)
E                   FileNotFoundError: [Errno 2] No such file or directory: 'nix'

args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
c2pread    = -1
c2pwrite   = -1
child_exception_type = <class 'OSError'>
close_fds  = True
creationflags = 0
cwd        = PosixPath('.../experimental/memory/rust')
env        = None
env_list   = None
err_filename = 'nix'
err_msg    = 'No such file or directory'
errno_num  = 2
errpipe_data = bytearray(b'OSError:2:')
errpipe_read = 288
errpipe_write = 289
errread    = -1
errwrite   = -1
exception_name = bytearray(b'OSError')
executable = b'nix'
executable_list = (b'.../dimos/dimos/.venv/bin/nix', b'.../cargo/bin/n...r.../_tool/uv/0.12.13/aarch64/nix', b'.../Users/ec2-user/.local/bin/nix', b'.../homebrew/bin/nix', ...)
fds_to_keep = {289}
gid        = None
gids       = None
hex_errno  = bytearray(b'2')
low_fds_to_close = []
orig_executable = 'nix'
p2cread    = -1
p2cwrite   = -1
part       = b''
pass_fds   = ()
pid        = 50333
preexec_fn = None
process_group = -1
restore_signals = True
self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
shell      = False
start_new_session = False
startupinfo = None
sts        = 65280
uid        = None
umask      = -1

../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1955: FileNotFoundError

dimos.experimental.memory.test_rust_recorder_e2e::test_rust_artifact_is_readable_by_python_memory2[mcap]

Flake rate in main: 48.48% (Passed 17 times, Failed 16 times)

Stack Traces | 0s run time

@pytest.fixture(scope="module")
    def rust_recorder_executable() -> Path:
>       subprocess.run(
            [
                "nix",
                "--extra-experimental-features",
                "nix-command flakes",
                "build",
                "-L",
                ".#dimos-memory-recorder",
                "--no-write-lock-file",
            ],
            cwd=_RUST_PACKAGE,
            check=True,
        )


.../experimental/memory/test_rust_recorder_e2e.py:78: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:548: in run
    with Popen(*popenargs, **kwargs) as process:
        capture_output = False
        check      = True
        input      = None
        kwargs     = {'cwd': PosixPath('.../experimental/memory/rust')}
        popenargs  = (['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...],)
        timeout    = None
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1026: in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
        args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
        bufsize    = -1
        c2pread    = -1
        c2pwrite   = -1
        close_fds  = True
        creationflags = 0
        cwd        = PosixPath('.../experimental/memory/rust')
        encoding   = None
        env        = None
        errors     = None
        errread    = -1
        errwrite   = -1
        executable = None
        extra_groups = None
        gid        = None
        gids       = None
        group      = None
        p2cread    = -1
        p2cwrite   = -1
        pass_fds   = ()
        pipesize   = -1
        preexec_fn = None
        process_group = -1
        restore_signals = True
        self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
        shell      = False
        start_new_session = False
        startupinfo = None
        stderr     = None
        stdin      = None
        stdout     = None
        text       = None
        uid        = None
        umask      = -1
        universal_newlines = None
        user       = None
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
args = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
executable = b'nix', preexec_fn = None, close_fds = True, pass_fds = ()
cwd = PosixPath('.../experimental/memory/rust')
env = None, startupinfo = None, creationflags = 0, shell = False, p2cread = -1
p2cwrite = -1, c2pread = -1, c2pwrite = -1, errread = -1, errwrite = -1
restore_signals = True, gid = None, gids = None, uid = None, umask = -1
start_new_session = False, process_group = -1

    def _execute_child(self, args, executable, preexec_fn, close_fds,
                       pass_fds, cwd, env,
                       startupinfo, creationflags, shell,
                       p2cread, p2cwrite,
                       c2pread, c2pwrite,
                       errread, errwrite,
                       restore_signals,
                       gid, gids, uid, umask,
                       start_new_session, process_group):
        """Execute program (POSIX version)"""
    
        if isinstance(args, (str, bytes)):
            args = [args]
        elif isinstance(args, os.PathLike):
            if shell:
                raise TypeError('path-like args is not allowed when '
                                'shell is true')
            args = [args]
        else:
            args = list(args)
    
        if shell:
            # On Android the default shell is at '....../system/bin/sh'.
            unix_shell = ('....../system/bin/sh' if
                      hasattr(sys, 'getandroidapilevel') else '/bin/sh')
            args = [unix_shell, "-c"] + args
            if executable:
                args[0] = executable
    
        if executable is None:
            executable = args[0]
    
        sys.audit("subprocess.Popen", executable, args, cwd, env)
    
        if (_USE_POSIX_SPAWN
                and os.path.dirname(executable)
                and preexec_fn is None
                and not close_fds
                and not pass_fds
                and cwd is None
                and (p2cread == -1 or p2cread > 2)
                and (c2pwrite == -1 or c2pwrite > 2)
                and (errwrite == -1 or errwrite > 2)
                and not start_new_session
                and process_group == -1
                and gid is None
                and gids is None
                and uid is None
                and umask < 0):
            self._posix_spawn(args, executable, env, restore_signals,
                              p2cread, p2cwrite,
                              c2pread, c2pwrite,
                              errread, errwrite)
            return
    
        orig_executable = executable
    
        # For transferring possible exec failure from child to parent.
        # Data format: "exception name:hex errno:description"
        # Pickle is not used; it is complex and involves memory allocation.
        errpipe_read, errpipe_write = os.pipe()
        # errpipe_write must not be in the standard io 0, 1, or 2 fd range.
        low_fds_to_close = []
        while errpipe_write < 3:
            low_fds_to_close.append(errpipe_write)
            errpipe_write = os.dup(errpipe_write)
        for low_fd in low_fds_to_close:
            os.close(low_fd)
        try:
            try:
                # We must avoid complex work that could involve
                # malloc or free in the child process to avoid
                # potential deadlocks, thus we do all this here.
                # and pass it to fork_exec()
    
                if env is not None:
                    env_list = []
                    for k, v in env.items():
                        k = os.fsencode(k)
                        if b'=' in k:
                            raise ValueError("illegal environment variable name")
                        env_list.append(k + b'=' + os.fsencode(v))
                else:
                    env_list = None  # Use execv instead of execve.
                executable = os.fsencode(executable)
                if os.path.dirname(executable):
                    executable_list = (executable,)
                else:
                    # This matches the behavior of os._execvpe().
                    executable_list = tuple(
                        os.path.join(os.fsencode(dir), executable)
                        for dir in os.get_exec_path(env))
                fds_to_keep = set(pass_fds)
                fds_to_keep.add(errpipe_write)
                self.pid = _fork_exec(
                        args, executable_list,
                        close_fds, tuple(sorted(map(int, fds_to_keep))),
                        cwd, env_list,
                        p2cread, p2cwrite, c2pread, c2pwrite,
                        errread, errwrite,
                        errpipe_read, errpipe_write,
                        restore_signals, start_new_session,
                        process_group, gid, gids, uid, umask,
                        preexec_fn, _USE_VFORK)
                self._child_created = True
            finally:
                # be sure the FD is closed no matter what
                os.close(errpipe_write)
    
            self._close_pipe_fds(p2cread, p2cwrite,
                                 c2pread, c2pwrite,
                                 errread, errwrite)
    
            # Wait for exec to fail or succeed; possibly raising an
            # exception (limited in size)
            errpipe_data = bytearray()
            while True:
                part = os.read(errpipe_read, 50000)
                errpipe_data += part
                if not part or len(errpipe_data) > 50000:
                    break
        finally:
            # be sure the FD is closed no matter what
            os.close(errpipe_read)
    
        if errpipe_data:
            try:
                pid, sts = os.waitpid(self.pid, 0)
                if pid == self.pid:
                    self._handle_exitstatus(sts)
                else:
                    self.returncode = sys.maxsize
            except ChildProcessError:
                pass
    
            try:
                exception_name, hex_errno, err_msg = (
                        errpipe_data.split(b':', 2))
                # The encoding here should match the encoding
                # written in by the subprocess implementations
                # like _posixsubprocess
                err_msg = err_msg.decode()
            except ValueError:
                exception_name = b'SubprocessError'
                hex_errno = b'0'
                err_msg = 'Bad exception data from child: {!r}'.format(
                              bytes(errpipe_data))
            child_exception_type = getattr(
                    builtins, exception_name.decode('ascii'),
                    SubprocessError)
            if issubclass(child_exception_type, OSError) and hex_errno:
                errno_num = int(hex_errno, 16)
                if err_msg == "noexec:chdir":
                    err_msg = ""
                    # The error must be from chdir(cwd).
                    err_filename = cwd
                elif err_msg == "noexec":
                    err_msg = ""
                    err_filename = None
                else:
                    err_filename = orig_executable
                if errno_num != 0:
                    err_msg = os.strerror(errno_num)
                if err_filename is not None:
>                   raise child_exception_type(errno_num, err_msg, err_filename)
E                   FileNotFoundError: [Errno 2] No such file or directory: 'nix'

args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
c2pread    = -1
c2pwrite   = -1
child_exception_type = <class 'OSError'>
close_fds  = True
creationflags = 0
cwd        = PosixPath('.../experimental/memory/rust')
env        = None
env_list   = None
err_filename = 'nix'
err_msg    = 'No such file or directory'
errno_num  = 2
errpipe_data = bytearray(b'OSError:2:')
errpipe_read = 288
errpipe_write = 289
errread    = -1
errwrite   = -1
exception_name = bytearray(b'OSError')
executable = b'nix'
executable_list = (b'.../dimos/dimos/.venv/bin/nix', b'.../cargo/bin/n...r.../_tool/uv/0.12.13/aarch64/nix', b'.../Users/ec2-user/.local/bin/nix', b'.../homebrew/bin/nix', ...)
fds_to_keep = {289}
gid        = None
gids       = None
hex_errno  = bytearray(b'2')
low_fds_to_close = []
orig_executable = 'nix'
p2cread    = -1
p2cwrite   = -1
part       = b''
pass_fds   = ()
pid        = 50333
preexec_fn = None
process_group = -1
restore_signals = True
self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
shell      = False
start_new_session = False
startupinfo = None
sts        = 65280
uid        = None
umask      = -1

../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1955: FileNotFoundError

dimos.experimental.memory.test_rust_recorder_e2e::test_rust_artifact_is_readable_by_python_memory2[sqlite]

Flake rate in main: 48.48% (Passed 17 times, Failed 16 times)

Stack Traces | 0.051s run time

@pytest.fixture(scope="module")
    def rust_recorder_executable() -> Path:
>       subprocess.run(
            [
                "nix",
                "--extra-experimental-features",
                "nix-command flakes",
                "build",
                "-L",
                ".#dimos-memory-recorder",
                "--no-write-lock-file",
            ],
            cwd=_RUST_PACKAGE,
            check=True,
        )


.../experimental/memory/test_rust_recorder_e2e.py:78: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:548: in run
    with Popen(*popenargs, **kwargs) as process:
        capture_output = False
        check      = True
        input      = None
        kwargs     = {'cwd': PosixPath('.../experimental/memory/rust')}
        popenargs  = (['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...],)
        timeout    = None
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1026: in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
        args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
        bufsize    = -1
        c2pread    = -1
        c2pwrite   = -1
        close_fds  = True
        creationflags = 0
        cwd        = PosixPath('.../experimental/memory/rust')
        encoding   = None
        env        = None
        errors     = None
        errread    = -1
        errwrite   = -1
        executable = None
        extra_groups = None
        gid        = None
        gids       = None
        group      = None
        p2cread    = -1
        p2cwrite   = -1
        pass_fds   = ()
        pipesize   = -1
        preexec_fn = None
        process_group = -1
        restore_signals = True
        self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
        shell      = False
        start_new_session = False
        startupinfo = None
        stderr     = None
        stdin      = None
        stdout     = None
        text       = None
        uid        = None
        umask      = -1
        universal_newlines = None
        user       = None
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
args = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
executable = b'nix', preexec_fn = None, close_fds = True, pass_fds = ()
cwd = PosixPath('.../experimental/memory/rust')
env = None, startupinfo = None, creationflags = 0, shell = False, p2cread = -1
p2cwrite = -1, c2pread = -1, c2pwrite = -1, errread = -1, errwrite = -1
restore_signals = True, gid = None, gids = None, uid = None, umask = -1
start_new_session = False, process_group = -1

    def _execute_child(self, args, executable, preexec_fn, close_fds,
                       pass_fds, cwd, env,
                       startupinfo, creationflags, shell,
                       p2cread, p2cwrite,
                       c2pread, c2pwrite,
                       errread, errwrite,
                       restore_signals,
                       gid, gids, uid, umask,
                       start_new_session, process_group):
        """Execute program (POSIX version)"""
    
        if isinstance(args, (str, bytes)):
            args = [args]
        elif isinstance(args, os.PathLike):
            if shell:
                raise TypeError('path-like args is not allowed when '
                                'shell is true')
            args = [args]
        else:
            args = list(args)
    
        if shell:
            # On Android the default shell is at '....../system/bin/sh'.
            unix_shell = ('....../system/bin/sh' if
                      hasattr(sys, 'getandroidapilevel') else '/bin/sh')
            args = [unix_shell, "-c"] + args
            if executable:
                args[0] = executable
    
        if executable is None:
            executable = args[0]
    
        sys.audit("subprocess.Popen", executable, args, cwd, env)
    
        if (_USE_POSIX_SPAWN
                and os.path.dirname(executable)
                and preexec_fn is None
                and not close_fds
                and not pass_fds
                and cwd is None
                and (p2cread == -1 or p2cread > 2)
                and (c2pwrite == -1 or c2pwrite > 2)
                and (errwrite == -1 or errwrite > 2)
                and not start_new_session
                and process_group == -1
                and gid is None
                and gids is None
                and uid is None
                and umask < 0):
            self._posix_spawn(args, executable, env, restore_signals,
                              p2cread, p2cwrite,
                              c2pread, c2pwrite,
                              errread, errwrite)
            return
    
        orig_executable = executable
    
        # For transferring possible exec failure from child to parent.
        # Data format: "exception name:hex errno:description"
        # Pickle is not used; it is complex and involves memory allocation.
        errpipe_read, errpipe_write = os.pipe()
        # errpipe_write must not be in the standard io 0, 1, or 2 fd range.
        low_fds_to_close = []
        while errpipe_write < 3:
            low_fds_to_close.append(errpipe_write)
            errpipe_write = os.dup(errpipe_write)
        for low_fd in low_fds_to_close:
            os.close(low_fd)
        try:
            try:
                # We must avoid complex work that could involve
                # malloc or free in the child process to avoid
                # potential deadlocks, thus we do all this here.
                # and pass it to fork_exec()
    
                if env is not None:
                    env_list = []
                    for k, v in env.items():
                        k = os.fsencode(k)
                        if b'=' in k:
                            raise ValueError("illegal environment variable name")
                        env_list.append(k + b'=' + os.fsencode(v))
                else:
                    env_list = None  # Use execv instead of execve.
                executable = os.fsencode(executable)
                if os.path.dirname(executable):
                    executable_list = (executable,)
                else:
                    # This matches the behavior of os._execvpe().
                    executable_list = tuple(
                        os.path.join(os.fsencode(dir), executable)
                        for dir in os.get_exec_path(env))
                fds_to_keep = set(pass_fds)
                fds_to_keep.add(errpipe_write)
                self.pid = _fork_exec(
                        args, executable_list,
                        close_fds, tuple(sorted(map(int, fds_to_keep))),
                        cwd, env_list,
                        p2cread, p2cwrite, c2pread, c2pwrite,
                        errread, errwrite,
                        errpipe_read, errpipe_write,
                        restore_signals, start_new_session,
                        process_group, gid, gids, uid, umask,
                        preexec_fn, _USE_VFORK)
                self._child_created = True
            finally:
                # be sure the FD is closed no matter what
                os.close(errpipe_write)
    
            self._close_pipe_fds(p2cread, p2cwrite,
                                 c2pread, c2pwrite,
                                 errread, errwrite)
    
            # Wait for exec to fail or succeed; possibly raising an
            # exception (limited in size)
            errpipe_data = bytearray()
            while True:
                part = os.read(errpipe_read, 50000)
                errpipe_data += part
                if not part or len(errpipe_data) > 50000:
                    break
        finally:
            # be sure the FD is closed no matter what
            os.close(errpipe_read)
    
        if errpipe_data:
            try:
                pid, sts = os.waitpid(self.pid, 0)
                if pid == self.pid:
                    self._handle_exitstatus(sts)
                else:
                    self.returncode = sys.maxsize
            except ChildProcessError:
                pass
    
            try:
                exception_name, hex_errno, err_msg = (
                        errpipe_data.split(b':', 2))
                # The encoding here should match the encoding
                # written in by the subprocess implementations
                # like _posixsubprocess
                err_msg = err_msg.decode()
            except ValueError:
                exception_name = b'SubprocessError'
                hex_errno = b'0'
                err_msg = 'Bad exception data from child: {!r}'.format(
                              bytes(errpipe_data))
            child_exception_type = getattr(
                    builtins, exception_name.decode('ascii'),
                    SubprocessError)
            if issubclass(child_exception_type, OSError) and hex_errno:
                errno_num = int(hex_errno, 16)
                if err_msg == "noexec:chdir":
                    err_msg = ""
                    # The error must be from chdir(cwd).
                    err_filename = cwd
                elif err_msg == "noexec":
                    err_msg = ""
                    err_filename = None
                else:
                    err_filename = orig_executable
                if errno_num != 0:
                    err_msg = os.strerror(errno_num)
                if err_filename is not None:
>                   raise child_exception_type(errno_num, err_msg, err_filename)
E                   FileNotFoundError: [Errno 2] No such file or directory: 'nix'

args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
c2pread    = -1
c2pwrite   = -1
child_exception_type = <class 'OSError'>
close_fds  = True
creationflags = 0
cwd        = PosixPath('.../experimental/memory/rust')
env        = None
env_list   = None
err_filename = 'nix'
err_msg    = 'No such file or directory'
errno_num  = 2
errpipe_data = bytearray(b'OSError:2:')
errpipe_read = 288
errpipe_write = 289
errread    = -1
errwrite   = -1
exception_name = bytearray(b'OSError')
executable = b'nix'
executable_list = (b'.../dimos/dimos/.venv/bin/nix', b'.../cargo/bin/n...r.../_tool/uv/0.12.13/aarch64/nix', b'.../Users/ec2-user/.local/bin/nix', b'.../homebrew/bin/nix', ...)
fds_to_keep = {289}
gid        = None
gids       = None
hex_errno  = bytearray(b'2')
low_fds_to_close = []
orig_executable = 'nix'
p2cread    = -1
p2cwrite   = -1
part       = b''
pass_fds   = ()
pid        = 50333
preexec_fn = None
process_group = -1
restore_signals = True
self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
shell      = False
start_new_session = False
startupinfo = None
sts        = 65280
uid        = None
umask      = -1

../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1955: FileNotFoundError

dimos.experimental.memory.test_rust_recorder_e2e::test_tf_records_over_zenoh_and_replays_through_python

Flake rate in main: 48.48% (Passed 17 times, Failed 16 times)

Stack Traces | 0s run time

@pytest.fixture(scope="module")
    def rust_recorder_executable() -> Path:
>       subprocess.run(
            [
                "nix",
                "--extra-experimental-features",
                "nix-command flakes",
                "build",
                "-L",
                ".#dimos-memory-recorder",
                "--no-write-lock-file",
            ],
            cwd=_RUST_PACKAGE,
            check=True,
        )


.../experimental/memory/test_rust_recorder_e2e.py:78: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:548: in run
    with Popen(*popenargs, **kwargs) as process:
        capture_output = False
        check      = True
        input      = None
        kwargs     = {'cwd': PosixPath('.../experimental/memory/rust')}
        popenargs  = (['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...],)
        timeout    = None
../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1026: in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
        args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
        bufsize    = -1
        c2pread    = -1
        c2pwrite   = -1
        close_fds  = True
        creationflags = 0
        cwd        = PosixPath('.../experimental/memory/rust')
        encoding   = None
        env        = None
        errors     = None
        errread    = -1
        errwrite   = -1
        executable = None
        extra_groups = None
        gid        = None
        gids       = None
        group      = None
        p2cread    = -1
        p2cwrite   = -1
        pass_fds   = ()
        pipesize   = -1
        preexec_fn = None
        process_group = -1
        restore_signals = True
        self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
        shell      = False
        start_new_session = False
        startupinfo = None
        stderr     = None
        stdin      = None
        stdout     = None
        text       = None
        uid        = None
        umask      = -1
        universal_newlines = None
        user       = None
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
args = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
executable = b'nix', preexec_fn = None, close_fds = True, pass_fds = ()
cwd = PosixPath('.../experimental/memory/rust')
env = None, startupinfo = None, creationflags = 0, shell = False, p2cread = -1
p2cwrite = -1, c2pread = -1, c2pwrite = -1, errread = -1, errwrite = -1
restore_signals = True, gid = None, gids = None, uid = None, umask = -1
start_new_session = False, process_group = -1

    def _execute_child(self, args, executable, preexec_fn, close_fds,
                       pass_fds, cwd, env,
                       startupinfo, creationflags, shell,
                       p2cread, p2cwrite,
                       c2pread, c2pwrite,
                       errread, errwrite,
                       restore_signals,
                       gid, gids, uid, umask,
                       start_new_session, process_group):
        """Execute program (POSIX version)"""
    
        if isinstance(args, (str, bytes)):
            args = [args]
        elif isinstance(args, os.PathLike):
            if shell:
                raise TypeError('path-like args is not allowed when '
                                'shell is true')
            args = [args]
        else:
            args = list(args)
    
        if shell:
            # On Android the default shell is at '....../system/bin/sh'.
            unix_shell = ('....../system/bin/sh' if
                      hasattr(sys, 'getandroidapilevel') else '/bin/sh')
            args = [unix_shell, "-c"] + args
            if executable:
                args[0] = executable
    
        if executable is None:
            executable = args[0]
    
        sys.audit("subprocess.Popen", executable, args, cwd, env)
    
        if (_USE_POSIX_SPAWN
                and os.path.dirname(executable)
                and preexec_fn is None
                and not close_fds
                and not pass_fds
                and cwd is None
                and (p2cread == -1 or p2cread > 2)
                and (c2pwrite == -1 or c2pwrite > 2)
                and (errwrite == -1 or errwrite > 2)
                and not start_new_session
                and process_group == -1
                and gid is None
                and gids is None
                and uid is None
                and umask < 0):
            self._posix_spawn(args, executable, env, restore_signals,
                              p2cread, p2cwrite,
                              c2pread, c2pwrite,
                              errread, errwrite)
            return
    
        orig_executable = executable
    
        # For transferring possible exec failure from child to parent.
        # Data format: "exception name:hex errno:description"
        # Pickle is not used; it is complex and involves memory allocation.
        errpipe_read, errpipe_write = os.pipe()
        # errpipe_write must not be in the standard io 0, 1, or 2 fd range.
        low_fds_to_close = []
        while errpipe_write < 3:
            low_fds_to_close.append(errpipe_write)
            errpipe_write = os.dup(errpipe_write)
        for low_fd in low_fds_to_close:
            os.close(low_fd)
        try:
            try:
                # We must avoid complex work that could involve
                # malloc or free in the child process to avoid
                # potential deadlocks, thus we do all this here.
                # and pass it to fork_exec()
    
                if env is not None:
                    env_list = []
                    for k, v in env.items():
                        k = os.fsencode(k)
                        if b'=' in k:
                            raise ValueError("illegal environment variable name")
                        env_list.append(k + b'=' + os.fsencode(v))
                else:
                    env_list = None  # Use execv instead of execve.
                executable = os.fsencode(executable)
                if os.path.dirname(executable):
                    executable_list = (executable,)
                else:
                    # This matches the behavior of os._execvpe().
                    executable_list = tuple(
                        os.path.join(os.fsencode(dir), executable)
                        for dir in os.get_exec_path(env))
                fds_to_keep = set(pass_fds)
                fds_to_keep.add(errpipe_write)
                self.pid = _fork_exec(
                        args, executable_list,
                        close_fds, tuple(sorted(map(int, fds_to_keep))),
                        cwd, env_list,
                        p2cread, p2cwrite, c2pread, c2pwrite,
                        errread, errwrite,
                        errpipe_read, errpipe_write,
                        restore_signals, start_new_session,
                        process_group, gid, gids, uid, umask,
                        preexec_fn, _USE_VFORK)
                self._child_created = True
            finally:
                # be sure the FD is closed no matter what
                os.close(errpipe_write)
    
            self._close_pipe_fds(p2cread, p2cwrite,
                                 c2pread, c2pwrite,
                                 errread, errwrite)
    
            # Wait for exec to fail or succeed; possibly raising an
            # exception (limited in size)
            errpipe_data = bytearray()
            while True:
                part = os.read(errpipe_read, 50000)
                errpipe_data += part
                if not part or len(errpipe_data) > 50000:
                    break
        finally:
            # be sure the FD is closed no matter what
            os.close(errpipe_read)
    
        if errpipe_data:
            try:
                pid, sts = os.waitpid(self.pid, 0)
                if pid == self.pid:
                    self._handle_exitstatus(sts)
                else:
                    self.returncode = sys.maxsize
            except ChildProcessError:
                pass
    
            try:
                exception_name, hex_errno, err_msg = (
                        errpipe_data.split(b':', 2))
                # The encoding here should match the encoding
                # written in by the subprocess implementations
                # like _posixsubprocess
                err_msg = err_msg.decode()
            except ValueError:
                exception_name = b'SubprocessError'
                hex_errno = b'0'
                err_msg = 'Bad exception data from child: {!r}'.format(
                              bytes(errpipe_data))
            child_exception_type = getattr(
                    builtins, exception_name.decode('ascii'),
                    SubprocessError)
            if issubclass(child_exception_type, OSError) and hex_errno:
                errno_num = int(hex_errno, 16)
                if err_msg == "noexec:chdir":
                    err_msg = ""
                    # The error must be from chdir(cwd).
                    err_filename = cwd
                elif err_msg == "noexec":
                    err_msg = ""
                    err_filename = None
                else:
                    err_filename = orig_executable
                if errno_num != 0:
                    err_msg = os.strerror(errno_num)
                if err_filename is not None:
>                   raise child_exception_type(errno_num, err_msg, err_filename)
E                   FileNotFoundError: [Errno 2] No such file or directory: 'nix'

args       = ['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '-L', '.#dimos-memory-recorder', ...]
c2pread    = -1
c2pwrite   = -1
child_exception_type = <class 'OSError'>
close_fds  = True
creationflags = 0
cwd        = PosixPath('.../experimental/memory/rust')
env        = None
env_list   = None
err_filename = 'nix'
err_msg    = 'No such file or directory'
errno_num  = 2
errpipe_data = bytearray(b'OSError:2:')
errpipe_read = 288
errpipe_write = 289
errread    = -1
errwrite   = -1
exception_name = bytearray(b'OSError')
executable = b'nix'
executable_list = (b'.../dimos/dimos/.venv/bin/nix', b'.../cargo/bin/n...r.../_tool/uv/0.12.13/aarch64/nix', b'.../Users/ec2-user/.local/bin/nix', b'.../homebrew/bin/nix', ...)
fds_to_keep = {289}
gid        = None
gids       = None
hex_errno  = bytearray(b'2')
low_fds_to_close = []
orig_executable = 'nix'
p2cread    = -1
p2cwrite   = -1
part       = b''
pass_fds   = ()
pid        = 50333
preexec_fn = None
process_group = -1
restore_signals = True
self       = <Popen: returncode: 255 args: ['nix', '--extra-experimental-features', 'nix-...>
shell      = False
start_new_session = False
startupinfo = None
sts        = 65280
uid        = None
umask      = -1

../../../../..../uv/python/cpython-3.12.13-macos-aarch64-none/lib/python3.12/subprocess.py:1955: FileNotFoundError

To view more test analytics, go to the Test Analytics Dashboard
_{📋 Got 3 mins? Take this short survey to help us improve Test Analytics.}

[greptile-apps]

Confidence Score: 3/5

Do not merge until session snapshots remain transferable and queued output is isolated to its originating session.

Findings

1.  Keep Snapshots Transferable ▶
2.  Isolate Session Events ▶
3.  Run Python MCP Coverage ▶

Summary

• Merge safety: unsafe. Long session histories can exceed the gateway transport limit and leave the terminal unable to receive a snapshot, while switching sessions can show output from a previously selected session. The workflow also leaves the DimOS Python MCP interoperability path untested and does not run for DimOS changes; that coverage gap is non-blocking but should be corrected.

_{Reviews (1) · Last reviewed commit: "feat(agent): add dimcode persistent Pi h..."}

[greptile-apps]

Keep Snapshots Transferable

If a saved session's message history exceeds the 16 MiB socket packet limit, attaching to it sends the complete session.messages array in one snapshot and closes the connection instead of returning state. Image and tool-result history can make a persisted session unreachable from the terminal. Truncate or paginate snapshot history, or stream it separately.

Artifacts

Evidence from the check

• Authored TypeScript probe that starts the actual gateway, injects boundary-sized session messages, and makes real Unix-socket requests; it is the executable reproduction source.

Command output from the check

• Captured execution output from the actual gateway probe shows a 15 MiB snapshot response succeeds while a 17 MiB snapshot response closes without data, demonstrating the bounded-send behavior.

_{Ran code and verified through T-Rex}

[greptile-apps]

Isolate Session Events

When /new or /resume switches sessions while the previous session is still emitting events, queued events are accepted using only their sequence number. Since each session has its own sequence counter, an old event with a higher number can be rendered into the newly selected session, adding stale text or tool cards to the wrong transcript. Keep queued events associated with their originating session and apply only events for the current session.

Artifacts

Evidence from the check

• The authored Node harness reads the exact terminal source gate and executes the pending-event restore sequence, ending with the reproduced stale rendering.

Command output from the check

• The executed harness output records old-session sequence 41 being queued and `STALE-A-EVENT` rendering after B's sequence-0 snapshot, confirming the defect.

Evidence from the check

• The authored Playwright script renders the inspected source gate and the executed reproduction outcome into the paired UI videos, ending with visual proof.

▶ Recording of the check

• Playwright Chromium captured the terminal restore code before the reproduction, highlighting the sequence-only gate that permits cross-session packets.

Poster frame of terminal source sequence-only gate

• Poster frame highlights lines 364-365 comparing only `packet.seq` and `current.seq`, establishing the faulty precondition.

▶ Recording of the check

• Playwright Chromium captured the focused runtime outcome where `STALE-A-EVENT` appears under `dimcode · B-new-session`, confirming the regression.

Poster frame showing stale A event in new B session

• Poster frame visibly shows the old-session event rendered after the new-session restore, confirming incorrect session isolation.

Command output from the check

• The capture command log records the executed Chromium video capture and successful exit, confirming the visual evidence was generated.

_{Ran code and verified through T-Rex}

[greptile-apps]

Run Python MCP Coverage

The workflow sets DIMCODE_TEST_DENO but not DIMCODE_TEST_PYTHON, so the real DimOS MCP image and error interoperability test is skipped. It also does not run for dimos/** changes. This is non-blocking, but changes at the Node/Python MCP boundary can merge without exercising their integration; provision Python, set DIMCODE_TEST_PYTHON, and include the relevant DimOS paths.

Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!

Artifacts

Evidence from the check

• The authored non-product shell harness compiles the checked-in test, runs its workflow-equivalent and Python-enabled variants, and evaluates the literal workflow paths; it provides reproducible validation.

Command output from the check

• The focused Node test ran from `agent` with Deno set and Python unset, matching the workflow's integration environment; it reports one skipped test, proving the Python MCP coverage does not execute.

Command output from the check

• The same Node test ran with the repository Python image and passed the real DimOS handlers, image, and isError flow; the appended workflow check shows a DimOS MCP source change does not match configured paths.

_{Ran code and verified through T-Rex}

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs.

[github-actions]

This pull request has been automatically closed because it has been stale for 30 days with no activity. Feel free to reopen it if you plan to continue working on it.