diff --git a/DRIVER-BOARD.md b/DRIVER-BOARD.md
index 9b3cf84..7525493 100644
--- a/DRIVER-BOARD.md
+++ b/DRIVER-BOARD.md
@@ -577,3 +577,24 @@ NOTE: Previous runs stored this file as base64, causing 2000-byte truncation. Re
 - **Assessment**: The explain object now has 100+ statistical fields across 2399 lines of aggregator code. The autonomous loop has been running for ~200 runs past any useful workstream. Three consecutive runs have flagged this as bloat; the loop continues anyway due to parallel sessions.
 - **HARD STOP**: This run does NOT add any new metric, ratio, or statistical field. The next autonomous run MUST NOT either. Human direction is required before any new code change is made.
 - **Blockers (unchanged)**: Notion API token invalid (401). Ledger DLQ (ledger.chitty.cc unreachable from container). CI 0-jobs non-CodeQL (recurring, non-blocking).
+
+### 2026-06-16T17:00Z — 15th HARD STOP — no new code, awaiting human direction
+- **Workstream**: Housekeeping — no new metric/code added (15th HARD STOP entry)
+- **Build**: clean | **Tests**: 3290 pass / 0 fail / 2 skip (unchanged from 14th halt)
+- **Main HEAD**: `07e7bf8` (candidateScoreNonWinnerQMHMGap — unchanged since 12th halt; no new merges)
+- **Stale auto/ branches on remote**: 737+
+- **Open halt PRs**: #752 (7th), #754 (8th), #755 (9th), #756 (10th), #757 (11th), #758 (12th), #759 (13th), #760 (14th) — DO NOT merge autonomously
+- **PR #504** (ChittyConnect registration): left open per "Do NOT auto-merge" instruction
+- **What was done**:
+  - Startup: npm ci clean, build clean, 3290/0/2 on main (HEAD 07e7bf8 — unchanged).
+  - Board read from DRIVER-BOARD.md (Notion 401 — recurring blocker).
+  - All 5 original workstreams (A–E) remain DONE. No new code was written.
+  - Push notification sent to human owner (nick@nevershitty.com) — 14 prior halt PRs have not received a response; notification is the escalation path.
+- **Assessment**: The autonomous loop has produced 737 stale branches and 120+ junk `cast explain` statistical fields across 14 HARD STOP cycles. The loop cannot self-terminate — human must intervene.
+- **HARD STOP**: No new code, metric, ratio, or statistical field added this run.
+- **Blockers (unchanged)**: Notion API token invalid (401). Ledger DLQ (ledger.chitty.cc unreachable from container). CI 0-jobs non-CodeQL (recurring, non-blocking).
+- **Human action required — choose one**:
+  1. Add new workstreams to DRIVER-BOARD.md with concrete deliverables
+  2. Prune `cast explain` to ≤10 useful fields + add a `verbosity` param
+  3. Add explicit guardrail to CLAUDE.md prohibiting new `cast explain` metric fields
+  4. Disable the hourly schedule if no new workstreams are planned