fix(spine): the measured dichotomy decides — hints demoted to labeled fallbacks (#2461, Nick correction)

Nick caught the deviation: module verdicts were substring-guessed from names (memory→rust, gitea→go) with a silent rust default. Authority order now: the measured classification map (import-evidence) decides FIRST for every module; hint hits are labeled "(name hint)" so provenance is visible; unmeasured+unhinted modules are "unclassified" (12), never a guessed rust. Store rebuilt: 106 rust / 45 go measured, 33+7 hint-labeled, 23 test-infra, 12 honest unclassified. Battery 95 green (test updated to pin the authority contract).

src/rune/spine_language.py

@@ -19,7 +19,9 @@ from __future__ import annotations
 import json
 from pathlib import Path
 
-from rune.structural_store import add_entity, now
+from rune.structural_store import (
+    add_entity, add_relationship, entity, new_doc, relationships, _sorted, now,
+)
 
 ROOT = Path(__file__).resolve().parents[2]
 SRC_DIR = ROOT / "src" / "rune"
@@ -56,6 +58,14 @@ def _place_languages(doc: dict) -> int:
     for e in doc.get("entities", []):
         eid = e.get("id", "")
         kind = e.get("kind", "")
+        # AUTHORITY ORDER (Nick's dichotomy, 2026-10-06 correction): the
+        # MEASURED classification map (import-evidence per module) decides
+        # FIRST. The name-hint lists are only a fallback for entities with
+        # no measurement — never allowed to override the evidence. A module
+        # with neither measurement nor hint is "unclassified", not a silent
+        # rust default.
+        measured = str(CLASSIFICATION_SIDES.get(
+            eid.split(":", 1)[1] if ":" in eid else eid, "") or "").upper()
         if eid.startswith("contract:"):
             lang = "n/a"
         elif kind == "rust-crate":
@@ -66,14 +76,22 @@ def _place_languages(doc: dict) -> int:
             lang = "n/a"
         elif kind == "deployment_surface":
             lang = "go"
+        elif measured == "RUST":
+            lang = "rust"
+        elif measured == "GO":
+            lang = "go"
+        elif measured == "TUI-LAST":
+            lang = "python-tui (Wave 6)"
+        elif measured == "TEST-INFRA" or measured == "RETIRES":
+            lang = "test-infra" if measured == "TEST-INFRA" else "retires"
         elif "tui" in eid:
             lang = "python-tui (Wave 6)"
         elif any(h in eid for h in GO_HINTS):
-            lang = "go"
+            lang = "go (name hint)"
         elif any(h in eid for h in RUST_HINTS):
-            lang = "rust"
+            lang = "rust (name hint)"
         elif kind == "module":
-            lang = "rust"
+            lang = "unclassified"
         elif kind == "subsystem":
             # A subsystem is a CONTAINER — its language is its members'
             # majority side per the measured dichotomy. The evidence map is

tests/test_spine_language.py

@@ -47,13 +47,17 @@ def test_language_verdicts_kind_defaults(doc):
     assert by["contract:BUILDER-x"] == "n/a"
 
 
-def test_language_verdicts_tui_and_hints(doc):
-    sl.add_entity(doc, id="module:rune_tui", kind="module")
-    sl.add_entity(doc, id="module:spine", kind="module")
+def test_language_verdicts_measured_authoritative_then_hints(doc):
+    """Nick's dichotomy correction: the measured map decides; hints only
+    label UNMEASURED entities and say so; nothing silently defaults."""
+    sl.add_entity(doc, id="module:rune_tui", kind="module")   # TUI-LAST measured
+    sl.add_entity(doc, id="module:spine", kind="module")      # RUST measured
+    sl.add_entity(doc, id="module:totally_unknown_name", kind="module")
     sl._place_languages(doc)
     by = {e["id"]: e["identities"]["language"] for e in doc["entities"]}
-    assert by["module:rune_tui"] == "python-tui (Wave 6)"
-    assert by["module:spine"] == "rust"
+    assert by["module:rune_tui"] == "python-tui (Wave 6)"   # from the MAP
+    assert by["module:spine"] == "rust"                      # from the MAP
+    assert by["module:totally_unknown_name"] == "unclassified"
 
 
 def test_subsystem_language_from_member_majority(doc):