anti
f8eae04e5d
BEHAVE-EXTRACTOR.md Phase A Step 0. Lays the package skeleton (__init__/extract/_parse/_ctx/_thresholds/_features) with empty FEATURES = (), so the worker plumbing in BEHAVE-INTEGRATION Phase 4 has a stable import path before any primitive lands. extract_session() builds a SessionContext once and fans the registered feature functions across it; at Step 0 that fan-out is empty and the function yields nothing. Step 1 (asciinema parser + paste-burst detector) and Step 2 (motor.input_modality) land next. Smoke suite asserts the empty contract: empty stream → no observations, single event → t_start == t_end, multi-event → events routed into input_events / output_events by kind, evidence_ref defaults to "session:<sid>" or honours an explicit override.
79 lines
2.2 KiB
Python
79 lines
2.2 KiB
Python
"""SessionContext: precomputed bundle every feature function reads from.
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A naïve engine re-walks the event stream once per primitive. We don't
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do that — one walk over the events builds this context, every feature
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reads from it. Adding a new feature is O(1) cost on the parse side.
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Step 0 ships only the structural fields (sid / source / evidence_ref /
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timing envelope). Step 1+ fills ``iats`` / ``paste_bursts`` /
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``commands`` / ``inter_cmd_iats`` / ``output_per_cmd``.
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"""
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from __future__ import annotations
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from dataclasses import dataclass, field
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from typing import Iterable
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from decnet.profiler.behave_shell._parse import AsciinemaEvent
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@dataclass(frozen=True, slots=True)
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class SessionContext:
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sid: str
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source: str
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evidence_ref: str
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t_start: float
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t_end: float
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duration_s: float
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input_events: tuple[AsciinemaEvent, ...] = field(default_factory=tuple)
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output_events: tuple[AsciinemaEvent, ...] = field(default_factory=tuple)
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def build_session_context(
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events: Iterable[AsciinemaEvent],
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*,
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sid: str,
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source: str,
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evidence_ref: str | None = None,
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) -> SessionContext:
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"""Single-pass build of the SessionContext for ``events``.
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``evidence_ref`` defaults to ``"session:" + sid`` so callers that
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don't yet plumb a real evidence pointer still get a stable,
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BEHAVE-envelope-valid string. Workers should pass an explicit
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pointer to the on-disk shard.
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"""
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inputs: list[AsciinemaEvent] = []
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outputs: list[AsciinemaEvent] = []
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t_first: float | None = None
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t_last: float = 0.0
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for ev in events:
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t, kind, _ = ev
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if t_first is None:
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t_first = t
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if t > t_last:
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t_last = t
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if kind == "i":
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inputs.append(ev)
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elif kind == "o":
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outputs.append(ev)
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if t_first is None:
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t_start = 0.0
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t_end = 0.0
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else:
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t_start = t_first
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t_end = t_last
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return SessionContext(
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sid=sid,
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source=source,
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evidence_ref=evidence_ref or f"session:{sid}",
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t_start=t_start,
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t_end=t_end,
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duration_s=max(0.0, t_end - t_start),
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input_events=tuple(inputs),
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output_events=tuple(outputs),
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)
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