diff --git a/docs/research/NEXT_100_PR_MAP.md b/docs/research/NEXT_100_PR_MAP.md
index 6bd11f04..7a234abf 100644
--- a/docs/research/NEXT_100_PR_MAP.md
+++ b/docs/research/NEXT_100_PR_MAP.md
@@ -240,7 +240,7 @@ Make it possible for an external reviewer to understand, in one artifact, why sp
 
 | ID | Task | Why it matters | Priority |
 |----|------|----------------|----------|
-| T1 | Add batch traceability index schema (BTI-). | Per-batch index linking every candidate family in the batch to its evidence artifacts (BSP/SEG/ECC/STL/RSR/PQT); required_artifact_ids computed; completeness_grade (complete/partial/empty); enables cross-batch audit. | C |
+| T1 | Add batch traceability index schema (BTI-) (complete). — src/openamp_foundry/evidence/batch_traceability_index.py: BTI- schema; BatchTraceabilityIndex (14 fields) + FamilyArtifactEntry helper; REQUIRED_BATCH_ARTIFACT_TYPES (4: BSP/SEG/ECC/STL); VALID_FAMILY_COMPLETENESS_GRADES (3: complete/partial/empty); VALID_BATCH_COMPLETENESS_GRADES (4: full/majority/minority/none); build() auto-computes from family_artifact_dicts; dry_lab_only=True; 61 tests. BASELINE: 9530→9576. PR #977. | Per-batch index linking every candidate family in the batch to its evidence artifacts (BSP/SEG/ECC/STL/RSR/PQT); required_artifact_ids computed; completeness_grade (complete/partial/empty); enables cross-batch audit. | C |
 | T2 | Add cross-batch audit summary schema (CBA2-). | Aggregates BTI records across all batches; counts families per grade; flags batches with low completeness; required for multi-batch meta-analysis. | C |
 | T3 | Add batch evidence gap report schema (BEG-). | Per-batch listing of which artifact types are missing across all families; prioritized gap list; enables targeted evidence collection. | C |
 | T4 | Add selection audit trail schema (SAT-). | Immutable ordered log of every selection/rejection decision with evidence_artifact_ids and rationale; enables full auditability from nomination to wet-lab shortlist. | C |