Index

core

Core module — registries, types, configuration, and event bus.

Classes

AgentRegistry

Bases: RegistryBase[Type['BaseAgent']]

Registry for agent implementations.

EngineRegistry

Bases: RegistryBase[Type['InferenceEngine']]

Registry for inference engine backends.

MemoryRegistry

Bases: RegistryBase[Type['MemoryBackend']]

Registry for memory / retrieval backends.

ModelRegistry

Bases: RegistryBase[Any]

Registry for ModelSpec objects.

ToolRegistry

Bases: RegistryBase[Any]

Registry for tool specifications.

Conversation dataclass

Conversation(
    messages: List[Message] = list(),
    max_messages: Optional[int] = None,
)

Ordered list of messages with an optional sliding-window cap.

Methods:

add

add(message: Message) -> None

Append a message, trimming oldest if max_messages is set.

Source code in src/diapason/core/types.py

def add(self, message: Message) -> None:
    """Append a message, trimming oldest if *max_messages* is set."""
    self.messages.append(message)
    if self.max_messages is not None and len(self.messages) > self.max_messages:
        self.messages = self.messages[-self.max_messages :]

window

window(n: int) -> List[Message]

Return the last n messages.

Source code in src/diapason/core/types.py

def window(self, n: int) -> List[Message]:
    """Return the last *n* messages."""
    if n <= 0:
        return []
    return self.messages[-n:]

Message dataclass

Message(
    role: Role,
    content: str | None = "",
    name: Optional[str] = None,
    tool_calls: Optional[List[ToolCall]] = None,
    tool_call_id: Optional[str] = None,
    metadata: Dict[str, Any] = dict(),
    images: Optional[List[str]] = None,
)

A single chat message (OpenAI-compatible structure).

Attributes

text property

text: str

Return message content as text, treating None as empty.

ModelSpec dataclass

ModelSpec(
    model_id: str,
    name: str,
    parameter_count_b: float,
    context_length: int,
    active_parameter_count_b: Optional[float] = None,
    quantization: Quantization = NONE,
    min_vram_gb: float = 0.0,
    supported_engines: Sequence[str] = (),
    provider: str = "",
    requires_api_key: bool = False,
    metadata: Dict[str, Any] = dict(),
)

Metadata describing a language model.

Quantization

Bases: str, Enum

Model quantization formats.

Role

Bases: str, Enum

Chat message roles (OpenAI-compatible).

TelemetryRecord dataclass

TelemetryRecord(
    timestamp: float,
    model_id: str,
    prompt_tokens: int = 0,
    prompt_tokens_evaluated: int = 0,
    completion_tokens: int = 0,
    total_tokens: int = 0,
    latency_seconds: float = 0.0,
    ttft: float = 0.0,
    cost_usd: float = 0.0,
    energy_joules: float = 0.0,
    power_watts: float = 0.0,
    gpu_utilization_pct: float = 0.0,
    gpu_memory_used_gb: float = 0.0,
    gpu_temperature_c: float = 0.0,
    throughput_tok_per_sec: float = 0.0,
    energy_per_output_token_joules: float = 0.0,
    throughput_per_watt: float = 0.0,
    prefill_latency_seconds: float = 0.0,
    decode_latency_seconds: float = 0.0,
    prefill_energy_joules: float = 0.0,
    decode_energy_joules: float = 0.0,
    mean_itl_ms: float = 0.0,
    median_itl_ms: float = 0.0,
    p90_itl_ms: float = 0.0,
    p95_itl_ms: float = 0.0,
    p99_itl_ms: float = 0.0,
    std_itl_ms: float = 0.0,
    is_streaming: bool = False,
    engine: str = "",
    agent: str = "",
    energy_method: str = "",
    energy_vendor: str = "",
    batch_id: str = "",
    is_warmup: bool = False,
    cpu_energy_joules: float = 0.0,
    gpu_energy_joules: float = 0.0,
    dram_energy_joules: float = 0.0,
    tokens_per_joule: float = 0.0,
    token_counting_version: Optional[int] = None,
    mining_session_id: Optional[str] = None,
    metadata: Dict[str, Any] = dict(),
)

Single telemetry observation recorded after an inference call.

ToolCall dataclass

ToolCall(id: str, name: str, arguments: str)

A single tool invocation request embedded in an assistant message.

ToolResult dataclass

ToolResult(
    tool_name: str,
    content: str,
    success: bool = True,
    usage: Dict[str, Any] = dict(),
    cost_usd: float = 0.0,
    latency_seconds: float = 0.0,
    metadata: Dict[str, Any] = dict(),
)

Result returned by a tool invocation.

Functions:

get_python_executable

get_python_executable() -> str

Return the best python interpreter name on PATH.

Prefers python3 (Linux/macOS convention); falls back to python (Windows / some minimal Linux distros that ship only python). Returns the literal string "python3" when neither is found, so callers still get a usable command that will fail with a clear "command not found" rather than an empty string.

The result is a command name or absolute path that callers can hand to :mod:subprocess directly when shell=False, and must be shell-quoted (:func:shlex.quote) before being interpolated into a shell=True command string — paths on Windows often contain spaces.

Source code in src/diapason/core/utils.py

def get_python_executable() -> str:
    """Return the best ``python`` interpreter name on PATH.

    Prefers ``python3`` (Linux/macOS convention); falls back to ``python``
    (Windows / some minimal Linux distros that ship only ``python``). Returns
    the literal string ``"python3"`` when neither is found, so callers still
    get a usable command that will fail with a clear "command not found"
    rather than an empty string.

    The result is a *command name or absolute path* that callers can hand to
    :mod:`subprocess` directly when ``shell=False``, and must be shell-quoted
    (:func:`shlex.quote`) before being interpolated into a ``shell=True``
    command string — paths on Windows often contain spaces.
    """
    return shutil.which("python3") or shutil.which("python") or "python3"

open_browser

open_browser(url: str) -> None

Open url in the user's default browser, with a Windows fast-path.

:func:webbrowser.open is the cross-platform default, but on Windows it sometimes blocks or fails inside a console host. cmd /c start "" "URL" is the canonical Windows incantation that hands the URL to the OS shell and returns immediately. We try that first on Windows and fall back to :func:webbrowser.open if the subprocess spawn fails.

Source code in src/diapason/core/utils.py

def open_browser(url: str) -> None:
    """Open *url* in the user's default browser, with a Windows fast-path.

    :func:`webbrowser.open` is the cross-platform default, but on Windows it
    sometimes blocks or fails inside a console host. ``cmd /c start "" "URL"``
    is the canonical Windows incantation that hands the URL to the OS shell
    and returns immediately. We try that first on Windows and fall back to
    :func:`webbrowser.open` if the subprocess spawn fails.
    """
    if platform.system() == "Windows":
        try:
            # The empty title argument after ``start`` is required: ``start``
            # treats a single quoted argument as a window title, not a URL.
            subprocess.run(["cmd", "/c", "start", "", url], check=False)
            return
        except Exception:  # noqa: BLE001 - any spawn failure -> fall back
            pass
    webbrowser.open(url)