anti
f2b3393669
Replaces LICENSE (GPLv3 -> AGPLv3) and prepends `SPDX-License-Identifier: AGPL-3.0-or-later` to every source file across decnet/, decnet_web/, tests/, scripts/, and tools/. Rationale: closes the GPLv3 ASP loophole so any party operating a modified DECNET as a network service must offer their modified source. Personal copyright (Samuel Paschuan) + inbound=outbound contributions make a future unilateral relicense infeasible. - LICENSE: full AGPL-3.0 text (gnu.org/licenses/agpl-3.0.txt) - COPYRIGHT: project copyright notice - tools/add_spdx_headers.py: idempotent header injector (shebang- and PEP 263-aware) Touches 1565 source files (.py, .ts, .tsx, .js, .jsx, .css, .sh). No behavior change; comments only.
57 lines
2.0 KiB
Python
57 lines
2.0 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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"""Shared state-modulation helpers for rule consumers.
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Both :class:`~decnet.ttp.impl.rule_engine.RuleEngine` and the per-source
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lifters (E.3.9 onward) read :class:`~decnet.ttp.store.base.RuleState`
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the same way: skip on ``disabled``, defense-in-depth re-check
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``expires_at``, clamp confidence on ``clipped``. Single source of truth
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so a future change to the state contract lands in one place.
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"""
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from __future__ import annotations
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from datetime import datetime, timezone
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from typing import TYPE_CHECKING
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if TYPE_CHECKING:
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from decnet.ttp.store.base import RuleState
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def is_active(state: "RuleState") -> bool:
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"""Return ``True`` iff a rule with this state is allowed to fire.
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``disabled`` rules never fire. ``clipped`` rules still fire — the
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clip caps emitted confidence, doesn't suppress the emit. Expired
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states act as ``disabled`` even though the store auto-reverts; the
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re-check here is defense-in-depth against a racing read between
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expiry and the store's revert pass.
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"""
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if state.state == "disabled":
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return False
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if state.expires_at is not None:
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expires = state.expires_at
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if expires.tzinfo is None:
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expires = expires.replace(tzinfo=timezone.utc)
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if expires < datetime.now(tz=timezone.utc):
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return False
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return True
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def apply_ceiling(base: float, state: "RuleState") -> float:
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"""Apply the operator's confidence ceiling, downward only.
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A ``clipped`` state with ``confidence_max < 1.0`` clamps the emitted
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confidence to ``min(base, base * ceiling)``. Any other state is a
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no-op. The clamp is downward by construction — operator clips can
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never raise a rule's confidence above its YAML-declared base, per
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TTP_TAGGING.md §"Confidence model".
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"""
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if state.state != "clipped":
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return base
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ceiling = state.confidence_max
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if ceiling is None or ceiling >= 1.0:
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return base
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return min(base, base * ceiling)
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__all__ = ["is_active", "apply_ceiling"]
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