diff --git a/.github/workflows/actions.lock b/.github/workflows/actions.lock
index dc919a66..c099b647 100644
--- a/.github/workflows/actions.lock
+++ b/.github/workflows/actions.lock
@@ -124,6 +124,8 @@ workflows:
         - 'gitleaks/gitleaks-action@v3.0.0'
         - 'taiki-e/install-action@v2.90.3'
         - 'trufflesecurity/trufflehog@v3.99.8'
+    '.github/workflows/sq-map-source-check.yml':
+        - 'actions/checkout@v7.0.1'
     '.github/workflows/standards-integration.yml': []
     '.github/workflows/tests.yml':
         - 'actions/cache@v6.1.0'
diff --git a/.github/workflows/sq-map-source-check.yml b/.github/workflows/sq-map-source-check.yml
new file mode 100644
index 00000000..ad321a5f
--- /dev/null
+++ b/.github/workflows/sq-map-source-check.yml
@@ -0,0 +1,98 @@
+# SPDX-License-Identifier: MPL-2.0
+# This workflow is managed by gh actions-lock.
+#
+# SQ map source check.
+#
+# Every hypatia/ci_failure_triage rule, and each of the two ADR 0004
+# workflow_audit ids (actions_lock_stale, mirror_without_visibility_guard),
+# needs a row in the Hypatia to squabbler rule map, proven/registry/sq-map.tsv
+# in hyperpolymath/proven-cicd-and-workflows. This job fails a change here that
+# adds such a rule without that row, and names the row, so the author adds it in
+# a proven-cicd PR first and then re-runs this job.
+#
+# What is checked: the registry the rule sources emit now, from
+# `scripts/gen-rules-praxis.sh --stdout`, not the committed
+# hypatia_rules_praxis.deed. A rule added without regenerating the deed is
+# therefore still seen. Whether the committed deed is stale is quality.yml's
+# check ("Rule registry (hypatia_rules_praxis.deed) matches the code and lints").
+#
+# proven-cicd is read at main, not at a pin: the question is whether the rule is
+# mapped now. The verdict is proven-cicd's own tests/registry-sq-map.sh. A failed
+# checkout, generator or test is NOT RUN and fails the job; it is never a pass.
+#
+# Not a required check: making it one is a ruleset change for the owner.
+
+name: SQ map source check
+
+on:
+  pull_request:
+    paths:
+      - hypatia_rules_praxis.deed
+      - scripts/gen-rules-praxis.sh
+      - scripts/check-sq-map.sh
+      - tests/check-sq-map-test.sh
+      - lib/rules/**
+      - lib/pattern_registry.ex
+      - lib/hypatia/cli.ex
+      - lib/hypatia/scanner_suppression.ex
+      - lib/scorecard_ingestor.ex
+      - .github/workflows/sq-map-source-check.yml
+  push:
+    branches: [main]
+    paths:
+      - hypatia_rules_praxis.deed
+      - scripts/gen-rules-praxis.sh
+      - scripts/check-sq-map.sh
+      - tests/check-sq-map-test.sh
+      - lib/rules/**
+      - lib/pattern_registry.ex
+      - lib/hypatia/cli.ex
+      - lib/hypatia/scanner_suppression.ex
+      - lib/scorecard_ingestor.ex
+      - .github/workflows/sq-map-source-check.yml
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  sq-map:
+    name: Triage rules have a row in proven-cicd sq-map.tsv
+    runs-on: ubuntu-24.04
+    timeout-minutes: 5
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v7.0.1
+        with:
+          persist-credentials: false
+
+      # Public repository: the default token reads it; nothing is written.
+      - name: Checkout proven-cicd-and-workflows at main (the map and its test)
+        id: proven
+        uses: actions/checkout@v7.0.1
+        with:
+          repository: hyperpolymath/proven-cicd-and-workflows
+          ref: main
+          path: proven-cicd
+          sparse-checkout: |
+            tests/registry-sq-map.sh
+            proven/registry/sq-map.tsv
+          sparse-checkout-cone-mode: false
+          persist-credentials: false
+
+      - name: Say NOT RUN when proven-cicd could not be checked out
+        if: failure() && steps.proven.outcome == 'failure'
+        run: |
+          echo "::error title=SQ map check NOT RUN::proven-cicd-and-workflows could not be checked out at main. This is not a pass: re-run the job."
+          printf '### SQ map check: NOT RUN\n\nproven-cicd-and-workflows could not be checked out at main. A check that did not run is not a pass.\n' >> "$GITHUB_STEP_SUMMARY"
+          exit 1
+
+      - name: Controls for the check
+        run: bash tests/check-sq-map-test.sh proven-cicd
+
+      - name: Every triage id the rule sources emit has a row
+        run: bash scripts/check-sq-map.sh proven-cicd
diff --git a/scripts/check-sq-map.sh b/scripts/check-sq-map.sh
new file mode 100755
index 00000000..7e4b0056
--- /dev/null
+++ b/scripts/check-sq-map.sh
@@ -0,0 +1,114 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: MPL-2.0
+# check-sq-map.sh: does every hypatia/ci_failure_triage id this tree emits, and
+# each of the two ADR 0004 workflow_audit ids, have a row in the Hypatia to
+# squabbler rule map, proven/registry/sq-map.tsv in
+# hyperpolymath/proven-cicd-and-workflows?
+#
+#   scripts/check-sq-map.sh PROVEN_CICD_DIR [DEED]
+#
+# PROVEN_CICD_DIR is a checkout of proven-cicd-and-workflows (CI checks out its
+# main branch, because the question is whether the rule is mapped now).
+#
+# DEED defaults to a fresh run of `scripts/gen-rules-praxis.sh --stdout`: the
+# registry this tree's rule sources emit now, so a rule added without
+# regenerating hypatia_rules_praxis.deed is still seen here. Whether the
+# committed deed is stale is a separate check (quality.yml, "Rule registry
+# (hypatia_rules_praxis.deed) matches the code and lints"). Pass a DEED to check
+# that file instead.
+#
+# The verdict is proven-cicd's own tests/registry-sq-map.sh, run with
+# HYPATIA_PRAXIS=DEED. This script adds only the cure: the exact row to add for
+# each id the test names, and where to add it.
+#
+# Exit: 0 every required id has a row; 1 the map lacks a row or a row is wrong;
+# 2 NOT RUN (the checkout, the generator or the test is missing or failed).
+# CI fails on 2 as well as on 1: a check that did not run is never a pass.
+set -euo pipefail
+cd "$(dirname "$0")/.."
+
+summary=${GITHUB_STEP_SUMMARY:-/dev/null}
+notrun() {
+  echo "::error title=SQ map check NOT RUN::$*"
+  printf '### SQ map check: NOT RUN\n\n%s\n\nA check that did not run is not a pass.\n' "$*" >>"$summary"
+  exit 2
+}
+
+proven=${1:-}
+[[ -n $proven ]] || notrun "usage: scripts/check-sq-map.sh PROVEN_CICD_DIR [DEED]"
+test=$proven/tests/registry-sq-map.sh
+map=$proven/proven/registry/sq-map.tsv
+[[ -f $test && -f $map ]] ||
+  notrun "$proven has no tests/registry-sq-map.sh or proven/registry/sq-map.tsv (a failed or partial checkout of proven-cicd-and-workflows)"
+
+work=$(mktemp -d)
+trap 'rm -rf -- "$work"' EXIT
+if [[ -n ${2:-} ]]; then
+  deed=$2
+  [[ -f $deed ]] || notrun "$deed missing"
+  what="$deed"
+else
+  deed=$work/hypatia_rules_praxis.deed
+  bash scripts/gen-rules-praxis.sh --stdout >"$deed" || notrun "scripts/gen-rules-praxis.sh --stdout failed"
+  [[ -s $deed ]] || notrun "scripts/gen-rules-praxis.sh --stdout printed nothing"
+  what="the registry the rule sources emit now (scripts/gen-rules-praxis.sh --stdout)"
+fi
+echo "checking $what against $map"
+
+# SQ_MAP and SQUABBLER_RULES are the test's other inputs: unset, so it reads
+# the checkout's own map and judges only the Hypatia direction.
+rc=0
+env -u SQ_MAP -u SQUABBLER_RULES HYPATIA_PRAXIS="$deed" bash "$test" >"$work/out" 2>&1 || rc=$?
+cat "$work/out"
+case $rc in
+  0) printf '### SQ map check: every required id has a row\n\nChecked %s.\n' "$what" >>"$summary"; exit 0 ;;
+  1) grep -q '^FAIL ' "$work/out" ||
+       notrun "proven-cicd tests/registry-sq-map.sh exited 1 without naming a broken rule (it could not judge)" ;;
+  *) notrun "proven-cicd tests/registry-sq-map.sh exited $rc" ;;
+esac
+
+# The test failed. Name the cure for each line it printed.
+note="in the praxis registry, not in ADR0004 mapping table; SQ rule is the squabbler owner's decision"
+missing=$(sed -n 's/^FAIL triage ids in the registry with no row[^:]*: //p' "$work/out" | tr ' ' '\n' | grep . || true)
+{
+  echo "### SQ map check: the map in proven-cicd-and-workflows needs a change"
+  echo
+  echo "Add the row(s) below to \`proven/registry/sq-map.tsv\` in a pull request on"
+  echo "hyperpolymath/proven-cicd-and-workflows first (keep the rows in id order and"
+  echo "the counts in \`proven/registry/README.adoc\` true). Once it is merged, re-run"
+  echo "this job here: it reads proven-cicd at main."
+  echo
+} >"$work/cure"
+if [[ -n $missing ]]; then
+  echo "Rows to add (tab-separated: a5_id, sq_id, status, praxis, note):" >>"$work/cure"
+  echo '```' >>"$work/cure"
+  while IFS= read -r id; do
+    if [[ $id == hypatia/ci_failure_triage/* ]]; then
+      printf '%s\tunassigned\tunmapped\tpresent\t%s\n' "$id" "$note" >>"$work/cure"
+    else
+      # The ADR 0004 workflow_audit ids are mapped rows; one is missing only
+      # when someone deleted it. Its SQ id comes from ADR 0004, not from here.
+      printf '%s\t<SQ id from ADR 0004>\tmapped\tpresent\tADR0004 mapping table\n' "$id" >>"$work/cure"
+    fi
+  done <<<"$missing"
+  echo '```' >>"$work/cure"
+  echo >>"$work/cure"
+  echo "\`unmapped\` with \`unassigned\` is right until the squabbler owner gives the id an SQ rule." >>"$work/cure"
+fi
+other=$(grep '^FAIL ' "$work/out" | grep -v '^FAIL triage ids in the registry with no row' || true)
+if [[ -n $other ]]; then
+  {
+    echo
+    echo "Other rows the test refused (fix or drop each in the same proven-cicd PR; a"
+    echo "praxis mismatch means a rule was added or removed here):"
+    echo '```'
+    echo "$other"
+    echo '```'
+  } >>"$work/cure"
+fi
+cat "$work/cure"
+cat "$work/cure" >>"$summary"
+while IFS= read -r id; do
+  [[ -n $id ]] && echo "::error title=No row in proven-cicd sq-map.tsv::$id has no row in proven/registry/sq-map.tsv; add it in proven-cicd-and-workflows first, then re-run"
+done <<<"$missing"
+exit 1
diff --git a/tests/check-sq-map-test.sh b/tests/check-sq-map-test.sh
new file mode 100755
index 00000000..0772361a
--- /dev/null
+++ b/tests/check-sq-map-test.sh
@@ -0,0 +1,72 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: MPL-2.0
+# Controls for scripts/check-sq-map.sh, against a checkout of
+# hyperpolymath/proven-cicd-and-workflows (its test and map are copied, so the
+# controls do not depend on what main's map holds today):
+#   * a registry whose ids all have rows passes (0);
+#   * a new ci_failure_triage id fails (1) and the cure names its exact row;
+#   * a deleted ADR 0004 workflow_audit row fails (1);
+#   * a missing or partial checkout, a missing deed, and a test that cannot
+#     judge are NOT RUN (2), never a pass;
+#   * with no deed the generator runs, and its registry is judged (0 or 1).
+#
+#   tests/check-sq-map-test.sh PROVEN_CICD_DIR
+set -euo pipefail
+cd "$(dirname "$0")/.."
+src=${1:?usage: tests/check-sq-map-test.sh PROVEN_CICD_DIR}
+[[ -f $src/tests/registry-sq-map.sh && -f $src/proven/registry/sq-map.tsv ]] ||
+  { echo "check-sq-map-test: $src is not a proven-cicd checkout; NOT RUN" >&2; exit 2; }
+work=$(mktemp -d)
+trap 'rm -rf -- "$work"' EXIT
+pass=0 fail=0
+ok() { pass=$((pass + 1)); echo "  ok   $1"; }
+bad() { fail=$((fail + 1)); echo "  FAIL $1" >&2; }
+fresh() { # -> $work/p, a copy of the test and the map
+  rm -rf -- "$work/p"; mkdir -p "$work/p/tests" "$work/p/proven/registry"
+  cp "$src/tests/registry-sq-map.sh" "$work/p/tests/"
+  cp "$src/proven/registry/sq-map.tsv" "$work/p/proven/registry/"
+}
+expect() { # NAME WANT ARGS...
+  local name=$1 want=$2 rc=0; shift 2
+  env -u GITHUB_STEP_SUMMARY bash scripts/check-sq-map.sh "$@" >"$work/out" 2>&1 || rc=$?
+  if [[ $rc == "$want" ]]; then ok "$name"; else bad "$name: wanted $want, got $rc"; sed 's/^/       /' "$work/out" | tail -12 >&2; fi
+}
+
+fresh
+# A registry of exactly the map's own ids: every required id has a row.
+grep -oE 'hypatia/[a-z0-9_]+/[A-Za-z0-9_]+' "$work/p/proven/registry/sq-map.tsv" | sort -u >"$work/own.deed"
+expect 'a registry whose ids all have rows passes' 0 "$work/p" "$work/own.deed"
+
+{ cat "$work/own.deed"; echo hypatia/ci_failure_triage/brand_new_rule; } >"$work/new.deed"
+expect 'a new ci_failure_triage id with no row fails' 1 "$work/p" "$work/new.deed"
+row=$(printf 'hypatia/ci_failure_triage/brand_new_rule\tunassigned\tunmapped\tpresent\t')
+grep -qF -- "$row" "$work/out" && ok 'the cure names the exact unmapped row' || bad 'the cure does not name the row'
+grep -q 'proven-cicd-and-workflows first' "$work/out" && ok 'the cure says where to add it' || bad 'the cure does not say where'
+# The printed row, appended to the map, makes the same registry pass.
+grep -F -- "$row" "$work/out" | head -n 1 >>"$work/p/proven/registry/sq-map.tsv"
+expect 'adding the printed row makes it pass' 0 "$work/p" "$work/new.deed"
+
+fresh
+grep -v '^hypatia/workflow_audit/actions_lock_stale	' "$src/proven/registry/sq-map.tsv" >"$work/p/proven/registry/sq-map.tsv"
+expect 'a deleted ADR 0004 workflow_audit row fails' 1 "$work/p" "$work/own.deed"
+grep -q '^hypatia/workflow_audit/actions_lock_stale	<SQ id from ADR 0004>	mapped' "$work/out" &&
+  ok 'the cure asks for the mapped row back' || bad 'the cure does not name the mapped row'
+
+fresh
+expect 'a missing checkout is NOT RUN' 2 "$work/absent" "$work/own.deed"
+rm "$work/p/tests/registry-sq-map.sh"
+expect 'a checkout without the test is NOT RUN' 2 "$work/p" "$work/own.deed"
+fresh
+expect 'a missing deed is NOT RUN' 2 "$work/p" "$work/absent.deed"
+echo 'no ids here' >"$work/empty.deed"
+expect 'a registry the test cannot read (its exit 2) is NOT RUN' 2 "$work/p" "$work/empty.deed"
+expect 'no PROVEN_CICD_DIR is NOT RUN' 2
+
+fresh
+rc=0; env -u GITHUB_STEP_SUMMARY bash scripts/check-sq-map.sh "$work/p" >"$work/out" 2>&1 || rc=$?
+if [[ $rc == 0 || $rc == 1 ]] && grep -q 'gen-rules-praxis.sh --stdout' "$work/out"; then
+  ok "with no deed the generator's registry is judged (exit $rc)"
+else bad "generator path: exit $rc"; tail -8 "$work/out" >&2; fi
+
+echo "check-sq-map-test: $pass passed, $fail failed"
+[[ $fail == 0 ]]