ContextualWisdomLab · seonghobae · Aug 28, 2026 · Aug 28, 2026 · Aug 28, 2026 · Aug 28, 2026
diff --git a/backend/app/main.py b/backend/app/main.py
@@ -147,6 +147,7 @@
 )
 from backend.app.occupational_construct_ingestion import (
     load_occupational_construct_assertions,
+    load_occupational_construct_evidence_status,
 )
 from backend.app.occupational_construct_search import (
     OccupationalConstructSearchError,

diff --git a/backend/app/ontology_neighborhood_ingestion.py b/backend/app/ontology_neighborhood_ingestion.py
@@ -26,7 +26,6 @@
     NODE_POST,
     NODE_PROJECT,
     NODE_TEAM,
-    EDGE_MENTION_PROJECT,
     EDGE_SUPPORTS_OCCUPATIONAL_CONSTRUCT,
 )
 from lineageweave.ontology import iri_for_lookup_code
@@ -441,7 +440,7 @@ async def _load_facts(
                and ($7::timestamptz is null or edge.created_at <= $7::timestamptz)
              group by edge.source_node_type_code, edge.source_node_id,
                       edge.target_node_type_code, edge.target_node_id,
-                      edge.edge_type_code
+                      edge.edge_type_code, edge.created_at
             union all
             select 'node_post'::text as source_node_type_code,
                    mention.post_id::text as source_node_id,

diff --git a/backend/tests/test_api.py b/backend/tests/test_api.py
@@ -38,6 +38,9 @@
 _VALKEY_URL = os.environ.get("LINEAGEWEAVE_TEST_VALKEY_URL", "redis://localhost:16379/0")
 _REALM = "lineageweave-demo"
 _MIGRATION_PATH = Path(__file__).resolve().parents[2] / "migrations" / "0001_initial_schema.sql"
+_PROV_O_MIGRATION = (
+    Path(__file__).resolve().parents[2] / "migrations" / "0017_prov_o_standard_relations.sql"
+)
 _REGISTRY_MIGRATION = Path(__file__).resolve().parents[2] / "migrations" / "0018_analysis_run_registry.sql"
 _RETENTION_MIGRATION = Path(__file__).resolve().parents[2] / "migrations" / "0020_analysis_run_retention_purge.sql"
 _RECONSTRUCTION_MIGRATION = (
@@ -187,6 +190,36 @@
     / "migrations"
     / "0233_report_leftover_map_unexplained_share.sql"
 )
+_VOICE_TAXONOMY_MIGRATION = (
+    Path(__file__).resolve().parents[2]
+    / "migrations"
+    / "0235_voice_of_x_post_taxonomy.sql"
+)
+_ONTOLOGY_TRUTH_STATUS_MIGRATION = (
+    Path(__file__).resolve().parents[2]
+    / "migrations"
+    / "0175_ontology_truth_status.sql"
+)
+_SOURCE_POST_VOICE_MIGRATION = (
+    Path(__file__).resolve().parents[2]
+    / "migrations"
+    / "0237_source_post_voice_combination.sql"
+)
+_SOURCE_POST_VOICE_HISTORY_MIGRATION = (
+    Path(__file__).resolve().parents[2]
+    / "migrations"
+    / "0243_source_post_voice_history.sql"
+)
+_OCCUPATIONAL_CONSTRUCT_ASSERTION_MIGRATION = (
+    Path(__file__).resolve().parents[2]
+    / "migrations"
+    / "0238_occupational_construct_assertion.sql"
+)
+_OCCUPATIONAL_CONSTRUCT_EXTRACTION_MIGRATION = (
+    Path(__file__).resolve().parents[2]
+    / "migrations"
+    / "0240_occupational_construct_extraction_run.sql"
+)
 _LEFTOVER_MAP_EXPLAINED_SHARE_MIGRATION = (
     Path(__file__).resolve().parents[2]
     / "migrations"
@@ -217,6 +250,16 @@
     / "migrations"
     / "0218_global_ask_public_verification.sql"
 )
+_ANALYSIS_RUN_TEPP_RECEIPT_MIGRATION = (
+    Path(__file__).resolve().parents[2]
+    / "migrations"
+    / "0217_analysis_run_tepp_receipt.sql"
+)
+_SOURCE_CONVERSATION_TURN_EVIDENCE_MIGRATION = (
+    Path(__file__).resolve().parents[2]
+    / "migrations"
+    / "0233_source_conversation_turn_evidence.sql"
+)
 _GLOBAL_ASK_KNOWLEDGE_CUTOFF_MIGRATION = (
     Path(__file__).resolve().parents[2]
     / "migrations"
@@ -332,6 +375,7 @@ def seeded_db(demo_analyst_token):
     try:
         with conn.cursor() as cur:
             cur.execute(_MIGRATION_PATH.read_text())
+            cur.execute(_PROV_O_MIGRATION.read_text())
             cur.execute(_REGISTRY_MIGRATION.read_text())
             cur.execute(_RETENTION_MIGRATION.read_text())
             cur.execute(_RECONSTRUCTION_MIGRATION.read_text())
@@ -415,6 +459,7 @@ def seeded_db(demo_analyst_token):
             )
             conn.autocommit = False
             cur.execute(_GLOBAL_ASK_KNOWLEDGE_CUTOFF_MIGRATION.read_text())
+            cur.execute(_ANALYSIS_RUN_TEPP_RECEIPT_MIGRATION.read_text())
             cur.execute(_GLOBAL_ASK_PUBLIC_VERIFICATION_MIGRATION.read_text())
             cur.execute(_EVENT_OCCURRED_AT_MIGRATION.read_text())
             cur.execute(_LEFTOVER_MAP_AXIS_MIGRATION.read_text())
@@ -423,6 +468,13 @@ def seeded_db(demo_analyst_token):
             cur.execute(_LEFTOVER_MAP_CROSS_SHARE_MIGRATION.read_text())
             cur.execute(_LEFTOVER_MAP_RECONSTRUCTION_MIGRATION.read_text())
             cur.execute(_LEFTOVER_MAP_UNEXPLAINED_SHARE_MIGRATION.read_text())
+            cur.execute(_ONTOLOGY_TRUTH_STATUS_MIGRATION.read_text())
+            cur.execute(_VOICE_TAXONOMY_MIGRATION.read_text())
+            cur.execute(_SOURCE_POST_VOICE_MIGRATION.read_text())
+            cur.execute(_SOURCE_CONVERSATION_TURN_EVIDENCE_MIGRATION.read_text())
+            cur.execute(_OCCUPATIONAL_CONSTRUCT_ASSERTION_MIGRATION.read_text())
+            cur.execute(_OCCUPATIONAL_CONSTRUCT_EXTRACTION_MIGRATION.read_text())
+            cur.execute(_SOURCE_POST_VOICE_HISTORY_MIGRATION.read_text())
             cur.execute(_LEFTOVER_MAP_EXPLAINED_SHARE_MIGRATION.read_text())
             cur.execute(_LEFTOVER_MAP_COORDINATES_MIGRATION.read_text())
             cur.execute(
@@ -1923,6 +1975,58 @@ def test_post_detail_uses_lookup_labels_not_raw_codes(client, demo_analyst_token
     assert body["visibility_label"] == "Public"
 
 
+def test_authenticated_ontology_neighborhood_reads_primary_voice_from_postgresql(
+    client, demo_analyst_token, seeded_db
+) -> None:
+    """The authenticated API preserves carrying evidence without inventing derivation."""
+    post_id = seeded_db["own_private_post_id"]
+    response = client.get(
+        "/api/ontology/neighborhood",
+        params={"focus_node_type": "node_post", "focus_node_id": post_id},
+        headers={"Authorization": f"Bearer {demo_analyst_token}"},
+    )
+
+    assert response.status_code == 200, response.text
+    payload = response.json()
+    primary = next(
+        assignment
+        for assignment in payload["voice_assignments"]
+        if assignment["is_primary"] and assignment["post_id"] == post_id
+    )
+    assert primary["post_id"] == post_id
+    assert primary["voice_type_code"] == "voc"
+    assert primary["truth_status_code"] == "truth_observed"
+    assert primary["evidence_post_id"] is None
+
+    row = next(
+        row
+        for row in payload["exact_value_rows"]
+        if row["property_code"] == "hasVoiceAssignment"
+        and row["source_node_id"] == post_id
+    )
+    assert row["source_node_id"] == post_id
+    assert row["evidence_post_id"] == post_id
+
+    assignment_iri = (
+        "https://contextualwisdomlab.github.io/LineageWeave/ontology#"
+        f"voice-assignment/{post_id}/voc"
+    )
+    projected = next(item for item in payload["jsonld"]["@graph"] if item.get("@id") == assignment_iri)
+    assert "prov:wasDerivedFrom" not in projected
+    assert (
+        "https://contextualwisdomlab.github.io/LineageWeave/ontology#voiceAssignmentEvidence"
+        not in projected
+    )
+    assert projected[
+        "https://contextualwisdomlab.github.io/LineageWeave/ontology#voiceAssignmentCarryingPost"
+    ] == {
+        "@id": (
+            "https://contextualwisdomlab.github.io/LineageWeave/ontology#"
+            f"node/node_post/{post_id}"
+        )
+    }
+
+
 def test_post_detail_exposes_explicit_and_semantic_project_evidence(
     client, demo_analyst_token, seeded_db
 ) -> None:

diff --git a/docs/adr/0252-temporal-primary-voice-history.md b/docs/adr/0252-temporal-primary-voice-history.md
@@ -2,11 +2,11 @@
 
 ## Status
 
-Accepted (2026-08-27). Extends ADR 0251 and closes issue #748.
+Accepted (2026-08-27). Extends ADR 0256 and closes issue #748.
 
 ## Context
 
-ADR 0251 records when a Voice assignment starts, but migration 0237 deletes
+ADR 0256 records when a Voice assignment starts, but migration 0237 deletes
 the former imported primary when `source_post.voc_type_code` changes. The live
 value is honest, yet an authorized knowledge-cutoff read after that update can
 no longer recover the primary that was effective at the cutoff. The existing

diff --git a/docs/adr/0256-evidence-bearing-voice-combinations.md b/docs/adr/0256-evidence-bearing-voice-combinations.md
@@ -52,8 +52,10 @@ compound lookup codes.
   keyword rule, confidence threshold, or weight converts those dimensions into
   a voice.
 - The public ontology represents each row as a qualified `VoiceAssignment`
-  linked from its post. Each assignment names one atomic SKOS voice concept;
-  additional assignments retain evidence through `prov:wasDerivedFrom`.
+  linked from its post. Each assignment names one atomic SKOS voice concept
+  and its carrying Post through `voiceAssignmentCarryingPost`, which does not
+  imply derivation. Additional assignments alone retain their distinct
+  evidence Post through `voiceAssignmentEvidence` and `prov:wasDerivedFrom`.
 - Authorized post list/detail responses expose ordered voice assignments with
   labels, truth state, and evidence availability but never internal assertion
   identifiers. Filters match any associated voice, and repeated post cards show
@@ -72,7 +74,8 @@ compound lookup codes.
   accounts without `post_admin` do not expose this write control.
 - The authorized ontology neighborhood projects each association as a
   qualified assignment in JSON-LD and the exact-value CSV. SHACL requires its
-  atomic voice concept, primary flag, and source-post evidence. The exact-value
+  atomic voice concept, primary flag, and carrying Post. Additional assignments
+  also require derivation evidence. The exact-value
   table opens the carrying Post and, separately, the already-authorized
   derivation-evidence Post. It does not invent a graph edge or expose an
   internal assertion identifier. A single bounded query loads

diff --git a/docs/adr/README.md b/docs/adr/README.md
@@ -12,7 +12,7 @@ decision from them.
 | [`product-requirements.md`](../product-requirements.md) | Product requirements projection across the ADR set; ADRs remain normative, including [0252](0252-temporal-primary-voice-history.md) |
 | [`product-technical-gap-baseline.md`](../product-technical-gap-baseline.md) | Product/technical traceability projection across the ADR set; ADRs remain normative |
 | [`lineage-bi-research-notes.md`](../lineage-bi-research-notes.md) | [0084](0084-lineage-research-grounding.md), [0062](0062-semantic-unit-embedding.md), [0064](0064-lineage-evidence-and-tree-assembly.md), [0024](0024-rankweave-fusion-fail-closed.md), [0165](0165-quantity-script-display.md), [0167](0167-rankweave-ranking-channel-evidence.md), [0169](0169-ask-batched-lineage-graph.md), [0172](0172-event-lineage-channel-evidence.md), [0202](0202-ask-event-time-filter.md), [0223](0223-explicit-semantic-content-unit-kinds.md), [0238](0238-source-conversation-turn-import-contract.md) |
-| [`voice-combination-technical-requirements.md`](../voice-combination-technical-requirements.md) | [0246](0246-expanded-voice-of-x-post-taxonomy.md), [0251](0256-evidence-bearing-voice-combinations.md), [0252](0252-temporal-primary-voice-history.md) |
+| [`voice-combination-technical-requirements.md`](../voice-combination-technical-requirements.md) | [0246](0246-expanded-voice-of-x-post-taxonomy.md), [0256](0256-evidence-bearing-voice-combinations.md), [0252](0252-temporal-primary-voice-history.md) |
 | [`lineage-bi-research-notes.md`](../lineage-bi-research-notes.md) | [0084](0084-lineage-research-grounding.md), [0062](0062-semantic-unit-embedding.md), [0064](0064-lineage-evidence-and-tree-assembly.md), [0024](0024-rankweave-fusion-fail-closed.md), [0165](0165-quantity-script-display.md), [0167](0167-rankweave-ranking-channel-evidence.md), [0169](0169-ask-batched-lineage-graph.md), [0172](0172-event-lineage-channel-evidence.md), [0202](0202-ask-event-time-filter.md), [0223](0223-explicit-semantic-content-unit-kinds.md) |
 | [`PROV_O_IMPLEMENTATION.md`](../PROV_O_IMPLEMENTATION.md) | [0065](0065-prov-o-provenance-boundary.md) |
 | [`PROV_O_IMPLEMENTATION_MATRIX.md`](../PROV_O_IMPLEMENTATION_MATRIX.md) | [0065](0065-prov-o-provenance-boundary.md) |

diff --git a/docs/ontology/lineageweave-kg-shapes.ttl b/docs/ontology/lineageweave-kg-shapes.ttl
@@ -187,12 +187,48 @@
         sh:datatype xsd:boolean ;
     ] ;
     sh:property [
-        sh:path :voiceAssignmentEvidence ;
-        sh:name "voice assignment evidence" ;
-        sh:description "Every assignment retains exactly one authorized supporting source post." ;
+        sh:path :voiceAssignmentCarryingPost ;
+        sh:name "voice assignment carrying post" ;
+        sh:description "Every assignment names exactly one authorized Post that carries it without implying derivation." ;
         sh:minCount 1 ;
         sh:maxCount 1 ;
         sh:class :Post ;
+    ] ;
+    sh:property [
+        sh:path :voiceAssignmentEvidence ;
+        sh:name "voice assignment derivation evidence" ;
+        sh:description "An additional assignment retains exactly one authorized evidence Post; imported primary assignments have none." ;
+        sh:maxCount 1 ;
+        sh:class :Post ;
+    ] ;
+    sh:sparql [
+        a sh:SPARQLConstraint ;
+        sh:message "Additional Voice assignments require derivation evidence; primary assignments must not claim it." ;
+        sh:select """
+            SELECT $this WHERE {
+                $this :primaryVoiceAssignment ?primary .
+                OPTIONAL { $this :voiceAssignmentEvidence ?evidence . }
+                FILTER ((?primary = false && !BOUND(?evidence)) ||
+                        (?primary = true && BOUND(?evidence)))
+            }
+        """ ;
+    ] ;
+    sh:sparql [
+        a sh:SPARQLConstraint ;
+        sh:message "The carrying Post must link to this Voice assignment." ;
+        sh:select """
+            SELECT DISTINCT $this WHERE {
+                {
+                    $this :voiceAssignmentCarryingPost ?post .
+                    FILTER NOT EXISTS { ?post :hasVoiceAssignment $this . }
+                }
+                UNION
+                {
+                    ?post :hasVoiceAssignment $this .
+                    FILTER NOT EXISTS { $this :voiceAssignmentCarryingPost ?post . }
+                }
+            }
+        """ ;
     ] .
 
 :OccupationalConstructAssertionShape a sh:NodeShape ;

diff --git a/docs/ontology/lineageweave-kg.ttl b/docs/ontology/lineageweave-kg.ttl
@@ -386,12 +386,18 @@
     rdfs:range xsd:boolean ;
     rdfs:label "primary voice assignment"@en .
 
+:voiceAssignmentCarryingPost a owl:ObjectProperty ;
+    rdfs:domain :VoiceAssignment ;
+    rdfs:range :Post ;
+    rdfs:label "voice assignment carrying post"@en ;
+    rdfs:comment "The authorized post that carries this qualified Voice assignment; this relation does not assert derivation."@en .
+
 :voiceAssignmentEvidence a owl:ObjectProperty ;
     rdfs:subPropertyOf prov:wasDerivedFrom ;
     rdfs:domain :VoiceAssignment ;
     rdfs:range :Post ;
     rdfs:label "voice assignment evidence"@en ;
-    rdfs:comment "The authorized source post that supports this qualified voice assignment."@en .
+    rdfs:comment "The authorized evidence post from which an additional qualified voice assignment was derived."@en .
 
 #################################################################
 # SKOS -- corporate_entity_level (Group -> Company -> Plant)