diff --git a/docs/50_LOOP_PLAN.md b/docs/50_LOOP_PLAN.md
index c45cfc68..14312055 100644
--- a/docs/50_LOOP_PLAN.md
+++ b/docs/50_LOOP_PLAN.md
@@ -242,7 +242,11 @@ Phase 4: ✅ Complete (Loops 40–49)
 | 28 ✅ | Policy version bump workflow for when real data arrives | `scripts/bump_recalibration_policy.py`: standalone script with `--dry-run`, decision-log guard, auto-increment + write. CI guard in `ci.yml` validates policy version changes against base branch. v0.5.49. 9 tests. | CI rejects policy PRs without valid decision log; `make bump-policy-version` and `make bump-policy-version-dry-run` available |
 | 29 ✅ | No public negative-result archive format. If Wave 1 yields all negatives, where do they go? | `docs/NEGATIVE_RESULT_ARCHIVE.md`: full template with entry schema, procedures, automation notes, and limitations. Covers pre-selection rejects, selected-untested, lab inactives, lab toxic, control failures. v0.5.50. | Template complete enough for a lab partner to fill; schema defines 18 fields with required/conditional markers |
 
-**All 50 loops complete.**
+**Next loop:** None. All 50 loops complete. See Loop 50 below.
+
+| Loop | Bottleneck | Deliverable | Verification |
+|------|-----------|-------------|-------------|
+| 50 ✅ | Reproducibility report lab_batch_pack check used wrong path (Makefile target, not file path); plan header stale | Fixed `full_reproducibility_report.py` to check for script. Updated plan docs. v0.5.70 | Report now correctly shows all Phase 4 artifacts. 2021 tests |
 
 **Phase 2 exit criteria (all 5 met ✅):**
 - ✅ `make calibration-loop` runs from clean checkout, produces batch-2 manifest
diff --git a/docs/METRICS_CURRENT.md b/docs/METRICS_CURRENT.md
index 9347a025..65718b85 100644
--- a/docs/METRICS_CURRENT.md
+++ b/docs/METRICS_CURRENT.md
@@ -5,7 +5,7 @@ Machine-readable snapshot: `outputs/metrics_snapshot.json` regenerated with `mak
 > **Purpose:** One authoritative table of current pipeline metrics. If any doc disagrees
 > with this file, this file wins. Updated whenever benchmark/benchmark config changes.
 >
-> **Last updated:** 2026-07-06 (culmination — v0.5.69)
+> **Last updated:** 2026-07-06 (loop 50 polish — v0.5.70)
 > **New in v0.5.65:** `scripts/build_lab_batch_pack.py` now writes `chain_of_custody.json` and `MANIFEST.json` into lab batch packs. The custody file includes SHA-256 hashes for `panel.csv`, the ordered candidate list, each candidate sequence, and each evidence certificate. `--verify-pack` verifies archive integrity and detects tampering. These hashes prove identity/integrity only, not biological activity, safety, or synthesis success. 5 tests.
 > **New in v0.5.64:** `schemas/decision_log.schema.json` — 12-field JSON Schema for human review decisions. Covers 9 decision types from AGENTS.md §8. Dissent conditional. 11 tests. 2000 total.
 > **New in v0.5.63:** `scripts/build_lab_batch_pack.py` — generates single zip with candidate CSV, 36 evidence certs, protocol refs, controls manifest, data return template. `make lab-batch-pack`. 10 tests. 1989 total.
diff --git a/docs/ROADMAP.md b/docs/ROADMAP.md
index 58506e8c..2a928b19 100644
--- a/docs/ROADMAP.md
+++ b/docs/ROADMAP.md
@@ -1,5 +1,18 @@
 # Roadmap
 
+## v0.5.70 — Loop 50: Reproducibility Report Polish ✓ (2026-07-06)
+
+Fixed lab_batch_pack check in reproducibility report (was checking for
+a Makefile target; now checks for the build script). All 50 loops complete.
+
+Changes:
+- ``scripts/full_reproducibility_report.py`` — Fixed lab_batch_pack path
+  to check for ``scripts/build_lab_batch_pack.py`` instead of ``make
+  lab-batch-pack``. Updated loops_completed to 50.
+- ``docs/50_LOOP_PLAN.md`` — Added Loop 50 entry. Next loop set to "None."
+- ``docs/METRICS_CURRENT.md`` — Changelog updated.
+- 2021 tests passing.
+
 ## v0.5.69 — Culmination Reproducibility Report (Loop 49) ✓ (2026-07-06)
 
 All 49 loops complete. Final reproducibility report documents pipeline
diff --git a/scripts/full_reproducibility_report.py b/scripts/full_reproducibility_report.py
index 2795a3bb..5b6bd17e 100644
--- a/scripts/full_reproducibility_report.py
+++ b/scripts/full_reproducibility_report.py
@@ -26,7 +26,7 @@ def build_report() -> dict:
         "report_type": "full_reproducibility",
         "pipeline_version": __version__,
         "generated_at": datetime.now(timezone.utc).isoformat(),
-        "loops_completed": 49,
+        "loops_completed": 50,
         "phases_completed": {
             "phase_0_structure": True,
             "phase_1_benchmark_honesty": True,
@@ -98,7 +98,7 @@ def build_report() -> dict:
         "pass_fail_criteria": "configs/wave1_pass_fail.yaml",
         "expert_review_template": ".github/ISSUE_TEMPLATE/expert_review.yml",
         "decision_log_schema": "schemas/decision_log.schema.json",
-        "lab_batch_pack": "make lab-batch-pack",
+        "lab_batch_pack": "scripts/build_lab_batch_pack.py",
         "analysis_plan": "docs/WAVE1_ANALYSIS_PLAN.md",
         "data_return_validation": "scripts/validate_lab_data_return.py",
         "publication_pack": "docs/PUBLICATION_PACK.md",
diff --git a/tests/test_full_reproducibility_report.py b/tests/test_full_reproducibility_report.py
index 29218643..b0ffa81b 100644
--- a/tests/test_full_reproducibility_report.py
+++ b/tests/test_full_reproducibility_report.py
@@ -10,7 +10,7 @@
 def test_report_builds():
     report = build_report()
     assert report["report_type"] == "full_reproducibility"
-    assert report["loops_completed"] == 49
+    assert report["loops_completed"] == 50
     assert "sections" in report