Recover ferrite bead Z from datasheet evidence without aborting graph_build.

tests/test_inductor_specs.py

@@ -1,4 +1,4 @@
-"""Ferrite beads without Z validate; other inductors still need henries."""
+"""Ferrite beads: recover Z from evidence; never invent; never abort ingest."""
 
 from __future__ import annotations
 
@@ -8,25 +8,26 @@ from pathlib import Path
 import pytest
 from pydantic import ValidationError
 
+from backend.periscopex.ferrite_z import recover_bead_specs, z_from_datasheet_text
 from backend.periscopex.graph import _load_component_models
-from backend.periscopex.models import ComponentModel, InductorSpecs
+from backend.periscopex.models import ComponentModel, InductorSpecs, SimpleComponentSpecs
 from backend.periscopex.resolve_passives import simple_to_typed_passive_specs
-from backend.periscopex.models import SimpleComponentSpecs
 
 
-def test_ferrite_bead_without_impedance_ohm_validates():
+def test_ferrite_bead_quoted_ohm_fills_z_not_henries():
     specs = InductorSpecs(
         component_subtype="passive.ferrite_bead",
         value_formatted="120 ohm @ 100 MHz",
         current_rating_a="3A",
         dcr_ohms=0.03,
     )
-    assert specs.impedance_ohm is None
+    assert specs.impedance_ohm == 120.0
+    assert specs.value_henries is None
     model = ComponentModel(mpn="BLM21PG121SN1D", specs=specs)
-    assert model.specs.impedance_ohm is None
+    assert model.specs.impedance_ohm == 120.0
 
 
-def test_ferrite_bead_live_payload_without_z_validates():
+def test_ferrite_bead_live_payload_fills_z_from_formatted():
     model = ComponentModel.model_validate({
         "mpn": "BLM21PG121SN1D",
         "specs": {
@@ -40,7 +41,8 @@ def test_ferrite_bead_live_payload_without_z_validates():
             "dcr_ohms": 0.03,
         },
     })
-    assert model.specs.impedance_ohm is None
+    assert model.specs.impedance_ohm == 120.0
+    assert model.specs.value_henries is None
     assert model.specs.current_rating_a == "3A"
     assert model.specs.dcr_ohms == 0.03
 
@@ -54,6 +56,7 @@ def test_ferrite_bead_with_impedance_ohm_still_ok():
         dcr_ohms=0.03,
     )
     assert specs.impedance_ohm == 120.0
+    assert specs.value_henries is None
 
 
 def test_inductor_still_requires_value_henries():
@@ -105,3 +108,42 @@ def test_simple_to_typed_bead_without_z():
     assert specs.specs_type == "inductor"
     assert specs.impedance_ohm is None
     assert specs.dcr_ohms == 0.03
+
+
+def test_bead_mpn_datasheet_text_fills_z():
+    text = (
+        "BLM21PG121SN1D chip ferrite bead\n"
+        "Impedance (at 100MHz / 20°C) 120 ohm\n"
+        "Rated current 3A\n"
+        "DC resistance 0.03 ohm\n"
+    )
+    hit = z_from_datasheet_text(text)
+    assert hit is not None
+    z, formatted = hit
+    assert z == 120.0
+    assert "100" in formatted
+    assert "datasheet" in formatted
+    specs = InductorSpecs(
+        component_subtype="passive.ferrite_bead",
+        value_formatted="FB",
+        current_rating_a="3A",
+        dcr_ohms=0.03,
+    )
+    filled = recover_bead_specs(specs, extra_text=text)
+    assert filled.impedance_ohm == 120.0
+    assert filled.value_henries is None
+
+
+def test_bead_mpn_datasheet_without_z_does_not_invent():
+    text = "BLM21PG121SN1D\nRated current 3 A\nDCR 0.03 ohm max\nPackage 0805"
+    assert z_from_datasheet_text(text) is None
+    specs = InductorSpecs(
+        component_subtype="passive.ferrite_bead",
+        value_formatted="FB",
+        current_rating_a="3A",
+        dcr_ohms=0.03,
+    )
+    filled = recover_bead_specs(specs, extra_text=text)
+    assert filled.impedance_ohm is None
+    model = ComponentModel(mpn="BLM21PG121SN1D", specs=filled)
+    assert model.specs.impedance_ohm is None

tests/test_periscope_taxonomy_skills_src.py

@@ -61,6 +61,6 @@ def test_skills_manifest_bumped_for_prompt_change():
     text = (ROOT / "periscope" / "src" / "backend" / "skills_manifest.json").read_text(
         encoding="utf-8"
     )
-    assert '"default_model_version": "1.14.0"' in text
+    assert '"default_model_version": "1.15.0"' in text
     validate = load_skill_validator("extract-pintable")
     assert validate is not None