diff --git a/scripts/fix-pmpl-drift.sh b/scripts/fix-pmpl-drift.sh
new file mode 100755
index 0000000..2bbea18
--- /dev/null
+++ b/scripts/fix-pmpl-drift.sh
@@ -0,0 +1,123 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: MPL-2.0
+# fix-pmpl-drift.sh — Flip legacy PMPL-1.0-or-later SPDX stamps to repo-category target
+# Recipe: recipe-fix-pmpl-drift (confidence: 0.95, auto_fixable: true)
+#
+# Per 2026-06-02 owner directive:
+#   sole-owner default → MPL-2.0
+#   son-shared        → AGPL-3.0-or-later (confirmed: idaptik, burble, standards, rattlescript, vcl-ut)
+#   palimpsest carve-out → KEEP PMPL (palimpsest-license, palimpsest-plasma; consent-aware-http special)
+#   007              → DO NOT TOUCH (ARR)
+#   third-party/forks → DO NOT TOUCH
+#
+# Usage: fix-pmpl-drift.sh <repo-path> [--dry-run] [--file <specific-file>]
+
+set -euo pipefail
+
+REPO_PATH="${1:?Usage: fix-pmpl-drift.sh <repo-path> [--dry-run]}"
+DRY_RUN=""
+SPECIFIC_FILE=""
+
+shift
+while [ $# -gt 0 ]; do
+  case "$1" in
+    --dry-run) DRY_RUN=1 ;;
+    --file) SPECIFIC_FILE="$2"; shift ;;
+    *) echo "Unknown arg: $1" >&2; exit 1 ;;
+  esac
+  shift
+done
+
+REPO_NAME=$(basename "$REPO_PATH")
+
+# ─── Carve-out check ───
+SKIP_REPOS=(
+  "007"
+  "palimpsest-license"
+  "palimpsest-plasma"
+  "game-server-admin"
+  "airborne-submarine-squadron"
+  "paint-type"
+)
+for skip in "${SKIP_REPOS[@]}"; do
+  if [ "$REPO_NAME" = "$skip" ]; then
+    echo "SKIP: $REPO_NAME is on the exclude_repos list (carve-out or third-party)"
+    exit 0
+  fi
+done
+
+# ─── Category classification via LICENSE file ───
+LICENSE_PATH="$REPO_PATH/LICENSE"
+if [ ! -f "$LICENSE_PATH" ]; then
+  echo "WARN: no LICENSE file at $LICENSE_PATH — skipping (cannot classify)"
+  exit 0
+fi
+
+LIC_HEAD=$(head -1 "$LICENSE_PATH" | tr -d '\n')
+
+if echo "$LIC_HEAD" | grep -q "MPL-2.0"; then
+  TARGET="MPL-2.0"
+  CATEGORY="sole-owner"
+elif echo "$LIC_HEAD" | grep -q "AGPL-3.0"; then
+  TARGET="AGPL-3.0-or-later"
+  CATEGORY="son-shared"
+elif echo "$LIC_HEAD" | grep -q "PMPL-1.0-or-later"; then
+  echo "INFO: $REPO_NAME LICENSE is PMPL-1.0-or-later (carve-out or staging) — skipping"
+  exit 0
+else
+  echo "WARN: $REPO_NAME LICENSE is unfamiliar (\"$LIC_HEAD\") — skipping (manual review)"
+  exit 0
+fi
+
+# ─── Sub-path exclusions ───
+EXCLUDE_PATTERNS=(
+  "/.git/"
+  "/LICENSES/"
+  "/rescript-tea/"
+  "/rescript-vite/"
+  "/affinescript-vite/"
+  "/idaptik-rescript13-staging/"
+  "/consent-aware-http/"
+)
+GREP_EXCLUDE=""
+for p in "${EXCLUDE_PATTERNS[@]}"; do
+  GREP_EXCLUDE+="${GREP_EXCLUDE:+|}$p"
+done
+
+# ─── Submodule exclusion (skip submodule paths) ───
+SUB_PATHS=""
+if [ -f "$REPO_PATH/.gitmodules" ]; then
+  while IFS= read -r submodule_path; do
+    SUB_PATHS+="${SUB_PATHS:+|}${submodule_path}/"
+  done < <(grep "path =" "$REPO_PATH/.gitmodules" | awk '{print $3}')
+fi
+[ -n "$SUB_PATHS" ] && GREP_EXCLUDE="$GREP_EXCLUDE|$SUB_PATHS"
+
+# ─── Find drift files ───
+cd "$REPO_PATH"
+if [ -n "$SPECIFIC_FILE" ]; then
+  FILES="$SPECIFIC_FILE"
+else
+  FILES=$(grep -rl "SPDX-License-Identifier: PMPL-1.0-or-later" . 2>/dev/null | grep -vE "$GREP_EXCLUDE" || true)
+fi
+
+COUNT=$(echo "$FILES" | grep -c . 2>/dev/null || echo 0)
+
+if [ "$COUNT" -eq 0 ]; then
+  echo "OK: $REPO_NAME has no PMPL drift in safe scope"
+  exit 0
+fi
+
+echo "$REPO_NAME ($CATEGORY → $TARGET): $COUNT files with PMPL drift"
+
+if [ -n "$DRY_RUN" ]; then
+  echo "$FILES" | head -20
+  [ "$COUNT" -gt 20 ] && echo "... and $((COUNT - 20)) more"
+  exit 0
+fi
+
+# ─── Flip ───
+echo "$FILES" | xargs sed -i "s|SPDX-License-Identifier: PMPL-1.0-or-later|SPDX-License-Identifier: $TARGET|g"
+
+REMAINING=$(grep -rl "SPDX-License-Identifier: PMPL-1.0-or-later" . 2>/dev/null | grep -vE "$GREP_EXCLUDE" | wc -l)
+echo "Flipped $COUNT files. Remaining PMPL in scope: $REMAINING."
diff --git a/scripts/fix-script-registry.json b/scripts/fix-script-registry.json
index eb085db..c9c9f04 100644
--- a/scripts/fix-script-registry.json
+++ b/scripts/fix-script-registry.json
@@ -45,7 +45,8 @@
       "MissingVerisimdbFeed": "fix-missing-verisimdb-feed.sh",
       "MissingFeedbackIntegration": "fix-missing-feedback-integration.sh",
       "MissingVexometerHooks": "fix-missing-vexometer-hooks.sh",
-      "TrackedNpmLockfile": "fix-tracked-package-lock.sh"
+      "TrackedNpmLockfile": "fix-tracked-package-lock.sh",
+      "LicensePMPLDrift": "fix-pmpl-drift.sh"
     },
     "by_recipe": {
       "recipe-heredoc-to-install": "fix-heredoc-install.sh",
@@ -103,7 +104,8 @@
       "chapel-manpath-guard": "fix-chapel-manpath-guard.sh",
       "chapel-chpl-llvm-export": "fix-chapel-chpl-llvm-export.sh",
       "chapel-replace-chpl-about-with-version": "fix-chapel-replace-chpl-about.sh",
-      "reusable_workflow_sha_bump_needs_propagation": "propagate-sha-bump.sh"
+      "reusable_workflow_sha_bump_needs_propagation": "propagate-sha-bump.sh",
+      "recipe-fix-pmpl-drift": "fix-pmpl-drift.sh"
     }
   }
 }