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Inspector

Trajectory Inspector

Full source code 
#!/usr/bin/env python3
"""
Simple trajectory inspector for browsing agent conversation trajectories.

More information about the usage: [bold green] https://mini-swe-agent.com/latest/usage/inspector/ [/bold green].
"""

import json
import os
import subprocess
import tempfile
from pathlib import Path

import typer
from rich.text import Text
from textual.app import App, ComposeResult
from textual.binding import Binding
from textual.command import DiscoveryHit, Hit, Hits, Provider
from textual.containers import Container, Vertical, VerticalScroll
from textual.widgets import Footer, Header, Static

from minisweagent.models.utils.content_string import get_content_string


def _messages_to_steps(messages: list[dict]) -> list[list[dict]]:
    """Group messages into "pages" as shown by the UI."""
    steps = []
    current_step = []
    for message in messages:
        # Start new step with new tool uses
        if message.get("extra", {}).get("actions") or message.get("role") == "assistant":
            steps.append(current_step)
            current_step = [message]
        else:
            current_step.append(message)
    if current_step:
        steps.append(current_step)
    return steps


app = typer.Typer(rich_markup_mode="rich", add_completion=False)


class BindingCommandProvider(Provider):
    """Provide bindings as commands in the palette."""

    COMMAND_DESCRIPTIONS = {
        "next_step": "Next step in the current trajectory",
        "previous_step": "Previous step in the current trajectory",
        "first_step": "First step in the current trajectory",
        "last_step": "Last step in the current trajectory",
        "scroll_down": "Scroll down",
        "scroll_up": "Scroll up",
        "next_trajectory": "Next trajectory",
        "previous_trajectory": "Previous trajectory",
        "open_in_jless": "Open the current step in jless",
        "open_in_jless_all": "Open the entire trajectory in jless",
        "toggle_reasoning": "Toggle reasoning content visibility",
        "reload": "Reload trajectory file from disk",
        "quit": "Quit the inspector",
    }

    async def discover(self) -> Hits:
        app = self.app
        for binding in app.BINDINGS:
            desc = self.COMMAND_DESCRIPTIONS.get(binding.action, binding.description)
            yield DiscoveryHit(desc, lambda b=binding: app.run_action(b.action))

    async def search(self, query: str) -> Hits:
        matcher = self.matcher(query)
        app = self.app
        for binding in app.BINDINGS:
            desc = self.COMMAND_DESCRIPTIONS.get(binding.action, binding.description)
            score = matcher.match(desc)
            if score > 0:
                yield Hit(score, matcher.highlight(desc), lambda b=binding: app.run_action(b.action))


class TrajectoryInspector(App):
    COMMANDS = {BindingCommandProvider}
    BINDINGS = [
        Binding("right,l", "next_step", "Step++"),
        Binding("left,h", "previous_step", "Step--"),
        Binding("0", "first_step", "Step=0"),
        Binding("$", "last_step", "Step=-1"),
        Binding("j,down", "scroll_down", "↓"),
        Binding("k,up", "scroll_up", "↑"),
        Binding("L", "next_trajectory", "Traj++"),
        Binding("H", "previous_trajectory", "Traj--"),
        Binding("e", "open_in_jless", "Jless"),
        Binding("E", "open_in_jless_all", "Jless (all)"),
        Binding("r", "toggle_reasoning", "Reasoning"),
        Binding("R", "reload", "Reload"),
        Binding("q", "quit", "Quit"),
    ]

    def __init__(self, trajectory_files: list[Path], show_reasoning: bool = True):
        css_path = os.environ.get(
            "MSWEA_INSPECTOR_STYLE_PATH", str(Path(__file__).parent.parent.parent / "config" / "inspector.tcss")
        )
        self.__class__.CSS = Path(css_path).read_text()

        super().__init__()
        self.show_reasoning = show_reasoning
        self.trajectory_files = trajectory_files
        self._i_trajectory = 0
        self._i_step = 0
        self.messages = []
        self.steps = []

        if trajectory_files:
            self._load_current_trajectory()

    # --- Basics ---

    @property
    def i_step(self) -> int:
        """Current step index."""
        return self._i_step

    @i_step.setter
    def i_step(self, value: int) -> None:
        """Set current step index, automatically clamping to valid bounds."""
        if value != self._i_step and self.n_steps > 0:
            self._i_step = max(0, min(value, self.n_steps - 1))
            self.query_one(VerticalScroll).scroll_to(y=0, animate=False)
            self.update_content()

    @property
    def n_steps(self) -> int:
        """Number of steps in current trajectory."""
        return len(self.steps)

    @property
    def i_trajectory(self) -> int:
        """Current trajectory index."""
        return self._i_trajectory

    @i_trajectory.setter
    def i_trajectory(self, value: int) -> None:
        """Set current trajectory index, automatically clamping to valid bounds."""
        if value != self._i_trajectory and self.n_trajectories > 0:
            self._i_trajectory = max(0, min(value, self.n_trajectories - 1))
            self._load_current_trajectory()
            self.query_one(VerticalScroll).scroll_to(y=0, animate=False)
            self.update_content()

    @property
    def n_trajectories(self) -> int:
        """Number of trajectory files."""
        return len(self.trajectory_files)

    def _load_current_trajectory(self) -> None:
        """Load the currently selected trajectory file."""
        if not self.trajectory_files:
            self.messages = []
            self.steps = []
            return

        trajectory_file = self.trajectory_files[self.i_trajectory]
        try:
            data = json.loads(trajectory_file.read_text())

            if isinstance(data, list):
                self.messages = data
            elif isinstance(data, dict) and "messages" in data:
                self.messages = data["messages"]
            else:
                raise ValueError("Unrecognized trajectory format")

            self.steps = _messages_to_steps(self.messages)
            self._i_step = 0
        except (json.JSONDecodeError, FileNotFoundError, ValueError) as e:
            self.messages = []
            self.steps = []
            self.notify(f"Error loading {trajectory_file.name}: {e}", severity="error")

    @property
    def current_trajectory_name(self) -> str:
        """Get the name of the current trajectory file."""
        if not self.trajectory_files:
            return "No trajectories"
        return self.trajectory_files[self.i_trajectory].name

    def compose(self) -> ComposeResult:
        yield Header()
        with Container(id="main"):
            with VerticalScroll():
                yield Vertical(id="content")
        yield Footer()

    def on_mount(self) -> None:
        self.update_content()

    def update_content(self) -> None:
        """Update the displayed content."""
        container = self.query_one("#content", Vertical)
        container.remove_children()

        if not self.steps:
            container.mount(Static("No trajectory loaded or empty trajectory"))
            self.title = "Trajectory Inspector - No Data"
            return

        for message in self.steps[self.i_step]:
            content_str = get_content_string(message)
            message_container = Vertical(classes="message-container")
            container.mount(message_container)
            role = message.get("role") or message.get("type") or "unknown"
            message_container.mount(Static(role.upper(), classes="message-header"))
            clean_str = content_str.replace("\x00", "")
            message_container.mount(Static(Text.from_ansi(clean_str, no_wrap=False), classes="message-content"))
            reasoning = message.get("reasoning_content")
            if reasoning and self.show_reasoning and role.lower() == "assistant":
                clean_reasoning = reasoning.replace("\x00", "")
                message_container.mount(Static("REASONING", classes="reasoning-header"))
                message_container.mount(
                    Static(Text.from_ansi(clean_reasoning, no_wrap=False), classes="reasoning-content")
                )

        self.title = (
            f"Trajectory {self.i_trajectory + 1}/{self.n_trajectories} - "
            f"{self.current_trajectory_name} - "
            f"Step {self.i_step + 1}/{self.n_steps}"
        )

    # --- Navigation actions ---

    def action_next_step(self) -> None:
        self.i_step += 1

    def action_previous_step(self) -> None:
        self.i_step -= 1

    def action_first_step(self) -> None:
        self.i_step = 0

    def action_last_step(self) -> None:
        self.i_step = self.n_steps - 1

    def action_next_trajectory(self) -> None:
        self.i_trajectory += 1

    def action_previous_trajectory(self) -> None:
        self.i_trajectory -= 1

    def action_scroll_down(self) -> None:
        vs = self.query_one(VerticalScroll)
        vs.scroll_to(y=vs.scroll_target_y + 15)

    def action_scroll_up(self) -> None:
        vs = self.query_one(VerticalScroll)
        vs.scroll_to(y=vs.scroll_target_y - 15)

    def _open_in_jless(self, path: Path) -> None:
        """Open file in jless."""
        with self.suspend():
            try:
                subprocess.run(["jless", path])
            except FileNotFoundError:
                self.notify("jless not found. Install with: `brew install jless`", severity="error")

    def action_open_in_jless(self) -> None:
        """Open the current step's messages in jless."""
        if not self.steps:
            self.notify("No messages to display", severity="warning")
            return
        with tempfile.NamedTemporaryFile(mode="w", suffix=".json", delete=False) as f:
            json.dump(self.steps[self.i_step], f, indent=2)
            temp_path = Path(f.name)
        self._open_in_jless(temp_path)
        temp_path.unlink()

    def action_toggle_reasoning(self) -> None:
        self.show_reasoning = not self.show_reasoning
        self.update_content()

    def action_reload(self) -> None:
        """Reload the current trajectory file from disk, preserving step position."""
        saved_step = self._i_step
        self._load_current_trajectory()
        self._i_step = min(saved_step, self.n_steps - 1) if self.n_steps > 0 else 0
        self.update_content()
        if self.steps:
            self.notify("Reloaded")

    def action_open_in_jless_all(self) -> None:
        """Open the entire trajectory in jless."""
        if not self.trajectory_files:
            self.notify("No trajectory to display", severity="warning")
            return
        self._open_in_jless(self.trajectory_files[self.i_trajectory])


@app.command(help=__doc__)
def main(
    path: str = typer.Argument(".", help="Directory to search for trajectory files or specific trajectory file"),
    reasoning: bool = typer.Option(True, "--reasoning/--no-reasoning", help="Show reasoning content"),
) -> None:
    path_obj = Path(path)

    if path_obj.is_file():
        trajectory_files = [path_obj]
    elif path_obj.is_dir():
        trajectory_files = sorted(path_obj.rglob("*.traj.json"))
        if not trajectory_files:
            raise typer.BadParameter(f"No trajectory files found in '{path}'")
    else:
        raise typer.BadParameter(f"Error: Path '{path}' does not exist")

    inspector = TrajectoryInspector(trajectory_files, show_reasoning=reasoning)
    inspector.run()


if __name__ == "__main__":
    app()

minisweagent.run.utilities.inspector

Simple trajectory inspector for browsing agent conversation trajectories.

More information about the usage: [bold green] https://mini-swe-agent.com/latest/usage/inspector/ [/bold green].

app module-attribute 

app = Typer(rich_markup_mode='rich', add_completion=False)

BindingCommandProvider

Bases: Provider

Provide bindings as commands in the palette.

COMMAND_DESCRIPTIONS class-attribute instance-attribute 

COMMAND_DESCRIPTIONS = {
    "next_step": "Next step in the current trajectory",
    "previous_step": "Previous step in the current trajectory",
    "first_step": "First step in the current trajectory",
    "last_step": "Last step in the current trajectory",
    "scroll_down": "Scroll down",
    "scroll_up": "Scroll up",
    "next_trajectory": "Next trajectory",
    "previous_trajectory": "Previous trajectory",
    "open_in_jless": "Open the current step in jless",
    "open_in_jless_all": "Open the entire trajectory in jless",
    "toggle_reasoning": "Toggle reasoning content visibility",
    "reload": "Reload trajectory file from disk",
    "quit": "Quit the inspector",
}

discover async 

discover() -> Hits
Source code in src/minisweagent/run/utilities/inspector.py 
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async def discover(self) -> Hits:
    app = self.app
    for binding in app.BINDINGS:
        desc = self.COMMAND_DESCRIPTIONS.get(binding.action, binding.description)
        yield DiscoveryHit(desc, lambda b=binding: app.run_action(b.action))

search async 

search(query: str) -> Hits
Source code in src/minisweagent/run/utilities/inspector.py 
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async def search(self, query: str) -> Hits:
    matcher = self.matcher(query)
    app = self.app
    for binding in app.BINDINGS:
        desc = self.COMMAND_DESCRIPTIONS.get(binding.action, binding.description)
        score = matcher.match(desc)
        if score > 0:
            yield Hit(score, matcher.highlight(desc), lambda b=binding: app.run_action(b.action))

TrajectoryInspector 

TrajectoryInspector(
    trajectory_files: list[Path],
    show_reasoning: bool = True,
)

Bases: App

Source code in src/minisweagent/run/utilities/inspector.py 
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def __init__(self, trajectory_files: list[Path], show_reasoning: bool = True):
    css_path = os.environ.get(
        "MSWEA_INSPECTOR_STYLE_PATH", str(Path(__file__).parent.parent.parent / "config" / "inspector.tcss")
    )
    self.__class__.CSS = Path(css_path).read_text()

    super().__init__()
    self.show_reasoning = show_reasoning
    self.trajectory_files = trajectory_files
    self._i_trajectory = 0
    self._i_step = 0
    self.messages = []
    self.steps = []

    if trajectory_files:
        self._load_current_trajectory()

COMMANDS class-attribute instance-attribute 

COMMANDS = {BindingCommandProvider}

BINDINGS class-attribute instance-attribute 

BINDINGS = [
    Binding("right,l", "next_step", "Step++"),
    Binding("left,h", "previous_step", "Step--"),
    Binding("0", "first_step", "Step=0"),
    Binding("$", "last_step", "Step=-1"),
    Binding("j,down", "scroll_down", "↓"),
    Binding("k,up", "scroll_up", "↑"),
    Binding("L", "next_trajectory", "Traj++"),
    Binding("H", "previous_trajectory", "Traj--"),
    Binding("e", "open_in_jless", "Jless"),
    Binding("E", "open_in_jless_all", "Jless (all)"),
    Binding("r", "toggle_reasoning", "Reasoning"),
    Binding("R", "reload", "Reload"),
    Binding("q", "quit", "Quit"),
]

show_reasoning instance-attribute 

show_reasoning = show_reasoning

trajectory_files instance-attribute 

trajectory_files = trajectory_files

messages instance-attribute 

messages = []

steps instance-attribute 

steps = []

i_step property writable 

i_step: int

Current step index.

n_steps property 

n_steps: int

Number of steps in current trajectory.

i_trajectory property writable 

i_trajectory: int

Current trajectory index.

n_trajectories property 

n_trajectories: int

Number of trajectory files.

current_trajectory_name property 

current_trajectory_name: str

Get the name of the current trajectory file.

compose 

compose() -> ComposeResult
Source code in src/minisweagent/run/utilities/inspector.py 
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def compose(self) -> ComposeResult:
    yield Header()
    with Container(id="main"):
        with VerticalScroll():
            yield Vertical(id="content")
    yield Footer()

on_mount 

on_mount() -> None
Source code in src/minisweagent/run/utilities/inspector.py 
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def on_mount(self) -> None:
    self.update_content()

update_content 

update_content() -> None

Update the displayed content.

Source code in src/minisweagent/run/utilities/inspector.py 
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def update_content(self) -> None:
    """Update the displayed content."""
    container = self.query_one("#content", Vertical)
    container.remove_children()

    if not self.steps:
        container.mount(Static("No trajectory loaded or empty trajectory"))
        self.title = "Trajectory Inspector - No Data"
        return

    for message in self.steps[self.i_step]:
        content_str = get_content_string(message)
        message_container = Vertical(classes="message-container")
        container.mount(message_container)
        role = message.get("role") or message.get("type") or "unknown"
        message_container.mount(Static(role.upper(), classes="message-header"))
        clean_str = content_str.replace("\x00", "")
        message_container.mount(Static(Text.from_ansi(clean_str, no_wrap=False), classes="message-content"))
        reasoning = message.get("reasoning_content")
        if reasoning and self.show_reasoning and role.lower() == "assistant":
            clean_reasoning = reasoning.replace("\x00", "")
            message_container.mount(Static("REASONING", classes="reasoning-header"))
            message_container.mount(
                Static(Text.from_ansi(clean_reasoning, no_wrap=False), classes="reasoning-content")
            )

    self.title = (
        f"Trajectory {self.i_trajectory + 1}/{self.n_trajectories} - "
        f"{self.current_trajectory_name} - "
        f"Step {self.i_step + 1}/{self.n_steps}"
    )

action_next_step 

action_next_step() -> None
Source code in src/minisweagent/run/utilities/inspector.py 
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def action_next_step(self) -> None:
    self.i_step += 1

action_previous_step 

action_previous_step() -> None
Source code in src/minisweagent/run/utilities/inspector.py 
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def action_previous_step(self) -> None:
    self.i_step -= 1

action_first_step 

action_first_step() -> None
Source code in src/minisweagent/run/utilities/inspector.py 
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def action_first_step(self) -> None:
    self.i_step = 0

action_last_step 

action_last_step() -> None
Source code in src/minisweagent/run/utilities/inspector.py 
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def action_last_step(self) -> None:
    self.i_step = self.n_steps - 1

action_next_trajectory 

action_next_trajectory() -> None
Source code in src/minisweagent/run/utilities/inspector.py 
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def action_next_trajectory(self) -> None:
    self.i_trajectory += 1

action_previous_trajectory 

action_previous_trajectory() -> None
Source code in src/minisweagent/run/utilities/inspector.py 
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def action_previous_trajectory(self) -> None:
    self.i_trajectory -= 1

action_scroll_down 

action_scroll_down() -> None
Source code in src/minisweagent/run/utilities/inspector.py 
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def action_scroll_down(self) -> None:
    vs = self.query_one(VerticalScroll)
    vs.scroll_to(y=vs.scroll_target_y + 15)

action_scroll_up 

action_scroll_up() -> None
Source code in src/minisweagent/run/utilities/inspector.py 
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def action_scroll_up(self) -> None:
    vs = self.query_one(VerticalScroll)
    vs.scroll_to(y=vs.scroll_target_y - 15)

action_open_in_jless 

action_open_in_jless() -> None

Open the current step's messages in jless.

Source code in src/minisweagent/run/utilities/inspector.py 
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def action_open_in_jless(self) -> None:
    """Open the current step's messages in jless."""
    if not self.steps:
        self.notify("No messages to display", severity="warning")
        return
    with tempfile.NamedTemporaryFile(mode="w", suffix=".json", delete=False) as f:
        json.dump(self.steps[self.i_step], f, indent=2)
        temp_path = Path(f.name)
    self._open_in_jless(temp_path)
    temp_path.unlink()

action_toggle_reasoning 

action_toggle_reasoning() -> None
Source code in src/minisweagent/run/utilities/inspector.py 
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def action_toggle_reasoning(self) -> None:
    self.show_reasoning = not self.show_reasoning
    self.update_content()

action_reload 

action_reload() -> None

Reload the current trajectory file from disk, preserving step position.

Source code in src/minisweagent/run/utilities/inspector.py 
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def action_reload(self) -> None:
    """Reload the current trajectory file from disk, preserving step position."""
    saved_step = self._i_step
    self._load_current_trajectory()
    self._i_step = min(saved_step, self.n_steps - 1) if self.n_steps > 0 else 0
    self.update_content()
    if self.steps:
        self.notify("Reloaded")

action_open_in_jless_all 

action_open_in_jless_all() -> None

Open the entire trajectory in jless.

Source code in src/minisweagent/run/utilities/inspector.py 
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def action_open_in_jless_all(self) -> None:
    """Open the entire trajectory in jless."""
    if not self.trajectory_files:
        self.notify("No trajectory to display", severity="warning")
        return
    self._open_in_jless(self.trajectory_files[self.i_trajectory])

main 

main(
    path: str = Argument(
        ".",
        help="Directory to search for trajectory files or specific trajectory file",
    ),
    reasoning: bool = Option(
        True,
        "--reasoning/--no-reasoning",
        help="Show reasoning content",
    ),
) -> None
Source code in src/minisweagent/run/utilities/inspector.py 
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@app.command(help=__doc__)
def main(
    path: str = typer.Argument(".", help="Directory to search for trajectory files or specific trajectory file"),
    reasoning: bool = typer.Option(True, "--reasoning/--no-reasoning", help="Show reasoning content"),
) -> None:
    path_obj = Path(path)

    if path_obj.is_file():
        trajectory_files = [path_obj]
    elif path_obj.is_dir():
        trajectory_files = sorted(path_obj.rglob("*.traj.json"))
        if not trajectory_files:
            raise typer.BadParameter(f"No trajectory files found in '{path}'")
    else:
        raise typer.BadParameter(f"Error: Path '{path}' does not exist")

    inspector = TrajectoryInspector(trajectory_files, show_reasoning=reasoning)
    inspector.run()
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