feat(profiler/behave_shell): G.5 emotional_valence.valence

Soft primitive — pure ratio over G.0 lexical counters:

* positive — positive_lex_hits > negative + obscenity, ≥ VALENCE_MIN_HITS
* negative — (negative + obscenity) > positive, sum ≥ VALENCE_MIN_HITS
* neutral  — fall-through

Skip below VALENCE_MIN_TYPED_CHARS (80). Confidence hard-capped at
EMOTIONAL_VALENCE_CONFIDENCE_CAP (0.5) inside the feature function;
0.30 below VALENCE_FULL_CONFIDENCE_MIN (200). Cap is registry
convention.

decnet/profiler/behave_shell/_features/__init__.py

@@ -24,6 +24,9 @@ from decnet.profiler.behave_shell._features.cognitive import (
     inter_command_consistency,
     inter_command_latency_class,
 )
+from decnet.profiler.behave_shell._features.emotional_valence import (
+    valence,
+)
 from decnet.profiler.behave_shell._features.environmental import (
     keyboard_layout,
     locale,
@@ -91,4 +94,5 @@ FEATURES: tuple[FeatureFn, ...] = (
     opsec_discipline,
     cleanup_behavior,
     multi_actor_indicators,
+    valence,
 )

decnet/profiler/behave_shell/_features/emotional_valence.py

@@ -0,0 +1,65 @@
+"""``emotional_valence.*`` feature functions (Phase G, soft block).
+
+All four primitives in this module ride a hard 0.5 confidence cap
+(:data:`EMOTIONAL_VALENCE_CONFIDENCE_CAP`). Cap is enforced inside
+the feature functions, *not* via :func:`make_observation` — sample-size
+honesty may still pull confidence below 0.5.
+
+Step G.5: ``emotional_valence.valence``.
+Step G.6: ``emotional_valence.arousal`` (lands later).
+Step G.7: ``emotional_valence.stress_response`` (lands later).
+Step G.8: ``emotional_valence.frustration_venting`` (lands later).
+"""
+from __future__ import annotations
+
+from typing import Iterator
+
+from decnet_behave_core.spec.envelope import Observation
+
+from decnet.profiler.behave_shell._ctx import SessionContext
+from decnet.profiler.behave_shell._features._emit import make_observation
+from decnet.profiler.behave_shell._thresholds import (
+    EMOTIONAL_VALENCE_CONFIDENCE_CAP,
+    VALENCE_FULL_CONFIDENCE_MIN,
+    VALENCE_MIN_HITS,
+    VALENCE_MIN_TYPED_CHARS,
+)
+
+
+def _cap_soft(c: float) -> float:
+    """Clamp confidence to the soft-primitive ceiling."""
+    return min(c, EMOTIONAL_VALENCE_CONFIDENCE_CAP)
+
+
+def valence(ctx: SessionContext) -> Iterator[Observation]:
+    """Emit ``emotional_valence.valence`` ∈ {positive, neutral, negative}.
+
+    Pure ratio over the lexical counters built in G.0:
+
+    * ``positive`` — ``positive_lex_hits > negative_lex_hits +
+      obscenity_hits`` AND ``positive_lex_hits ≥ VALENCE_MIN_HITS`` (2).
+    * ``negative`` — ``negative_lex_hits + obscenity_hits >
+      positive_lex_hits`` AND that sum ≥ ``VALENCE_MIN_HITS``.
+    * ``neutral`` — fall-through.
+
+    Skip emission below ``VALENCE_MIN_TYPED_CHARS`` (80) typed letters.
+    Confidence hard-capped at 0.50 (registry convention); 0.30 below
+    ``VALENCE_FULL_CONFIDENCE_MIN`` (200).
+    """
+    if ctx.typed_letter_count < VALENCE_MIN_TYPED_CHARS:
+        return
+    pos = ctx.positive_lex_hits
+    neg_total = ctx.negative_lex_hits + ctx.obscenity_hits
+    if pos > neg_total and pos >= VALENCE_MIN_HITS:
+        value = "positive"
+    elif neg_total > pos and neg_total >= VALENCE_MIN_HITS:
+        value = "negative"
+    else:
+        value = "neutral"
+    raw = 0.50 if ctx.typed_letter_count >= VALENCE_FULL_CONFIDENCE_MIN else 0.30
+    yield make_observation(
+        ctx,
+        primitive="emotional_valence.valence",
+        value=value,
+        confidence=_cap_soft(raw),
+    )