diff --git a/.github/scripts/apply-pr-quality-ruleset.sh b/.github/scripts/apply-pr-quality-ruleset.sh
index 7a768236..d4436ae4 100755
--- a/.github/scripts/apply-pr-quality-ruleset.sh
+++ b/.github/scripts/apply-pr-quality-ruleset.sh
@@ -2,17 +2,18 @@
 # apply-pr-quality-ruleset.sh — Idempotently create/update the pr-quality ruleset
 #
 # This script creates (or updates) the `pr-quality` repository ruleset that
-# enforces pull-request quality gates on the default branch of
+# enforces pull-request review quality gates on the default branch of
 # petry-projects/markets.
 #
 # Pull-request rule parameters configured (codified standard, source of truth:
-# petry-projects/.github/standards/rulesets/pr-quality.json — see #323, #324):
-#   - required_approving_review_count: 1
-#   - require_code_owner_review: true       (drifted to false — issue #323)
-#   - required_review_thread_resolution: true
-#   - dismiss_stale_reviews_on_push: true   (the drifted parameter — issue #324)
-#   - require_last_push_approval: true
-#   - allowed_merge_methods: ["squash"]
+# petry-projects/.github/standards/rulesets/pr-quality.json — see #575/#580):
+#   - required_approving_review_count: 1     at least one approving review
+#   - require_code_owner_review: true        CODEOWNERS must approve
+#   - required_review_thread_resolution: true  all review threads resolved
+#   - dismiss_stale_reviews_on_push: true    new pushes invalidate approvals
+#   - require_last_push_approval: true        someone other than the last pusher
+#                                             must approve (drift fix — see #325)
+#   - allowed_merge_methods: ["squash"]      squash-only merges
 #
 # Standard reference:
 #   https://github.com/petry-projects/.github/blob/main/standards/github-settings.md#pr-quality--standard-ruleset-all-repositories
@@ -40,8 +41,8 @@ export GH_TOKEN
 EXISTING_ID=$(gh api "repos/$REPO/rulesets" \
   --jq ".[] | select(.name == \"$RULESET_NAME\") | .id")
 
-PAYLOAD=$(jq -n --arg name "$RULESET_NAME" '{
-  name: $name,
+PAYLOAD=$(jq -n '{
+  name: "pr-quality",
   target: "branch",
   enforcement: "active",
   conditions: {
@@ -82,21 +83,7 @@ if [ -n "$EXISTING_ID" ]; then
   echo "Done — ruleset updated: https://github.com/$REPO/rules/$EXISTING_ID"
 else
   echo "Creating $RULESET_NAME ruleset ..."
-  # Capture stderr so a 422 conflict from concurrent creation doesn't terminate the script.
-  # On conflict, re-fetch the ID created by the concurrent run and update instead.
-  if RESULT=$(echo "$PAYLOAD" | gh api -X POST "repos/$REPO/rulesets" --input - 2>&1); then
-    NEW_ID=$(echo "$RESULT" | jq -r '.id')
-    echo "Done — ruleset created: https://github.com/$REPO/rules/$NEW_ID"
-  else
-    EXISTING_ID=$(gh api "repos/$REPO/rulesets" \
-      --jq ".[] | select(.name == \"$RULESET_NAME\") | .id")
-    if [ -z "$EXISTING_ID" ]; then
-      echo "ERROR: POST failed and no existing $RULESET_NAME ruleset found" >&2
-      echo "$RESULT" >&2
-      exit 1
-    fi
-    echo "Concurrent creation detected — updating $RULESET_NAME ruleset (id=$EXISTING_ID) ..."
-    echo "$PAYLOAD" | gh api -X PUT "repos/$REPO/rulesets/$EXISTING_ID" --input - > /dev/null
-    echo "Done — ruleset updated: https://github.com/$REPO/rules/$EXISTING_ID"
-  fi
+  RESULT=$(echo "$PAYLOAD" | gh api -X POST "repos/$REPO/rulesets" --input -)
+  NEW_ID=$(echo "$RESULT" | jq -r '.id')
+  echo "Done — ruleset created: https://github.com/$REPO/rules/$NEW_ID"
 fi
diff --git a/.github/scripts/apply-repo-settings.sh b/.github/scripts/apply-repo-settings.sh
index 5079916a..2f2d9c09 100755
--- a/.github/scripts/apply-repo-settings.sh
+++ b/.github/scripts/apply-repo-settings.sh
@@ -61,7 +61,7 @@ echo "Applying code-quality required-status-checks ruleset ..."
 
 "$SCRIPT_DIR/apply-code-quality-ruleset.sh"
 
-echo "Applying pr-quality pull-request review ruleset ..."
+echo "Applying pr-quality ruleset ..."
 
 "$SCRIPT_DIR/apply-pr-quality-ruleset.sh"
 
diff --git a/.github/scripts/tests/apply-pr-quality-ruleset.bats b/.github/scripts/tests/apply-pr-quality-ruleset.bats
index 79f96347..d4ff1f71 100644
--- a/.github/scripts/tests/apply-pr-quality-ruleset.bats
+++ b/.github/scripts/tests/apply-pr-quality-ruleset.bats
@@ -1,14 +1,22 @@
 #!/usr/bin/env bats
-# Tests for apply-pr-quality-ruleset.sh — static content assertions, no live API calls.
+# Tests for apply-pr-quality-ruleset.sh
 #
-# The pull_request rule parameters asserted below are the codified standard
-# (petry-projects/.github/standards/rulesets/pr-quality.json), the source of
-# truth referenced by issues #323 and #324. require_code_owner_review (#323)
-# and dismiss_stale_reviews_on_push (#324) are the parameters that drifted to
-# false and must be codified as true.
+# Static checks verify the script's safety settings and target repo.
+# The payload test mocks the gh CLI to capture the actual JSON sent to the
+# GitHub API and uses jq to assert structure and values — avoids fragile
+# grep-on-source-file assertions.
 
 SCRIPT="$(cd "$(dirname "$BATS_TEST_FILENAME")/.." && pwd)/apply-pr-quality-ruleset.sh"
 
+setup() {
+  export BATS_TMPDIR="$(mktemp -d)"
+  export GH_TOKEN="mock-token"
+}
+
+teardown() {
+  rm -rf "$BATS_TMPDIR"
+}
+
 @test "script exists and is executable" {
   [ -f "$SCRIPT" ]
   [ -x "$SCRIPT" ]
@@ -19,41 +27,46 @@ SCRIPT="$(cd "$(dirname "$BATS_TEST_FILENAME")/.." && pwd)/apply-pr-quality-rule
 }
 
 @test "script targets petry-projects/markets repo" {
-  grep -qE '^REPO="petry-projects/markets"$' "$SCRIPT"
-}
-
-@test "script declares the pr-quality ruleset" {
-  grep -qE 'RULESET_NAME\s*=\s*"pr-quality"' "$SCRIPT"
-}
-
-@test "script requires GH_TOKEN" {
-  grep -q 'GH_TOKEN' "$SCRIPT"
+  grep -q 'petry-projects/markets' "$SCRIPT"
 }
 
-@test "script sets dismiss_stale_reviews_on_push to true (issue #324)" {
-  grep -qE '^[[:space:]]+dismiss_stale_reviews_on_push[[:space:]]*:[[:space:]]*true[[:space:]]*,?[[:space:]]*$' "$SCRIPT"
-}
-
-@test "script requires one approving review" {
-  grep -qE '^[[:space:]]+required_approving_review_count[[:space:]]*:[[:space:]]*1[[:space:]]*,?[[:space:]]*$' "$SCRIPT"
-}
-
-@test "script requires code owner review (issue #323)" {
-  grep -qE '^[[:space:]]+require_code_owner_review[[:space:]]*:[[:space:]]*true[[:space:]]*,?[[:space:]]*$' "$SCRIPT"
-}
+@test "script generates correct ruleset payload" {
+  gh() {
+    if [ "$1" = "api" ]; then
+      if [ "$2" = "repos/petry-projects/markets/rulesets" ]; then
+        echo ""
+        return 0
+      elif [ "$2" = "-X" ] && [ "$3" = "POST" ]; then
+        cat > "$BATS_TMPDIR/payload.json"
+        echo '{"id": 12345}'
+        return 0
+      fi
+    fi
+    command gh "$@"
+  }
+  export -f gh
 
-@test "script requires review thread resolution" {
-  grep -qE '^[[:space:]]+required_review_thread_resolution[[:space:]]*:[[:space:]]*true[[:space:]]*,?[[:space:]]*$' "$SCRIPT"
-}
+  run bash "$SCRIPT"
+  [ "$status" -eq 0 ]
 
-@test "script requires last push approval" {
-  grep -qE '^[[:space:]]+require_last_push_approval[[:space:]]*:[[:space:]]*true[[:space:]]*,?[[:space:]]*$' "$SCRIPT"
-}
+  [ "$(jq -r '.name' "$BATS_TMPDIR/payload.json")" = "pr-quality" ]
+  [ "$(jq -r '.target' "$BATS_TMPDIR/payload.json")" = "branch" ]
+  [ "$(jq -r '.enforcement' "$BATS_TMPDIR/payload.json")" = "active" ]
+  [ "$(jq -r '.conditions.ref_name.include[0]' "$BATS_TMPDIR/payload.json")" = "~DEFAULT_BRANCH" ]
+  [ "$(jq -r '.rules[0].type' "$BATS_TMPDIR/payload.json")" = "pull_request" ]
 
-@test "script restricts allowed_merge_methods to squash" {
-  grep -qE 'allowed_merge_methods:\s*\[\s*"squash"\s*\]' "$SCRIPT"
-}
+  local params=".rules[0].parameters"
+  [ "$(jq -r "$params.required_approving_review_count" "$BATS_TMPDIR/payload.json")" -eq 1 ]
+  [ "$(jq -r "$params.require_code_owner_review" "$BATS_TMPDIR/payload.json")" = "true" ]
+  [ "$(jq -r "$params.required_review_thread_resolution" "$BATS_TMPDIR/payload.json")" = "true" ]
+  [ "$(jq -r "$params.dismiss_stale_reviews_on_push" "$BATS_TMPDIR/payload.json")" = "true" ]
+  [ "$(jq -r "$params.require_last_push_approval" "$BATS_TMPDIR/payload.json")" = "true" ]
+  [ "$(jq -r "$params.allowed_merge_methods[0]" "$BATS_TMPDIR/payload.json")" = "squash" ]
 
-@test "script declares a pull_request rule type" {
-  grep -qE 'type:\s*"pull_request"' "$SCRIPT"
+  [ "$(jq '.bypass_actors | length' "$BATS_TMPDIR/payload.json")" -eq 2 ]
+  [ "$(jq -r '.bypass_actors[0].actor_type' "$BATS_TMPDIR/payload.json")" = "OrganizationAdmin" ]
+  [ "$(jq -r '.bypass_actors[0].bypass_mode' "$BATS_TMPDIR/payload.json")" = "always" ]
+  [ "$(jq -r '.bypass_actors[1].actor_type' "$BATS_TMPDIR/payload.json")" = "Integration" ]
+  [ "$(jq -r '.bypass_actors[1].bypass_mode' "$BATS_TMPDIR/payload.json")" = "always" ]
+  [ "$(jq '.bypass_actors[1].actor_id' "$BATS_TMPDIR/payload.json")" -eq 3167543 ]
 }
diff --git a/.github/scripts/tests/apply-repo-settings.bats b/.github/scripts/tests/apply-repo-settings.bats
index 570edf38..c5b8a9a7 100755
--- a/.github/scripts/tests/apply-repo-settings.bats
+++ b/.github/scripts/tests/apply-repo-settings.bats
@@ -34,6 +34,6 @@ SCRIPT="$(cd "$(dirname "$BATS_TEST_FILENAME")/.." && pwd)/apply-repo-settings.s
   grep -q 'apply-code-quality-ruleset.sh' "$SCRIPT"
 }
 
-@test "script wires in pr-quality ruleset application (issues #323, #324)" {
+@test "script wires in pr-quality ruleset application (issue #325)" {
   grep -q 'apply-pr-quality-ruleset.sh' "$SCRIPT"
 }
diff --git a/.github/workflows/add-to-project.yml b/.github/workflows/add-to-project.yml
index 60466bba..d5b20a58 100644
--- a/.github/workflows/add-to-project.yml
+++ b/.github/workflows/add-to-project.yml
@@ -56,4 +56,4 @@ jobs:
     # `secrets: inherit` handing the reusable every org secret).
     secrets:
       INITIATIVES_APP_ID: ${{ secrets.INITIATIVES_APP_ID }}
-      INITIATIVES_APP_PRIVATE_KEY: ${{ secrets.INITIATIVES_APP_PRIVATE_KEY }}
\ No newline at end of file
+      INITIATIVES_APP_PRIVATE_KEY: ${{ secrets.INITIATIVES_APP_PRIVATE_KEY }}
diff --git a/.github/workflows/dev-lead.yml b/.github/workflows/dev-lead.yml
index 01e794b2..fbceadb3 100644
--- a/.github/workflows/dev-lead.yml
+++ b/.github/workflows/dev-lead.yml
@@ -56,14 +56,14 @@ permissions: {}
 
 jobs:
   dev-lead:
-    # Pinned to the moving dev-lead/stable channel tag, not @main, so a broken
+    # Pinned to the moving dev-lead/v1-stable channel tag, not @main, so a broken
     # change to dev-lead can no longer gate its own fix (the self-host circular
-    # dependency). Promotion is done by moving the dev-lead/stable tag centrally; this
+    # dependency). Promotion is done by moving the dev-lead/v1-stable tag centrally; this
     # caller is never edited on release. agent_ref threads the same channel into
     # dev-lead's own scripts/prompts checkout. See https://github.com/petry-projects/.github/blob/main/standards/ci-standards.md#dev-lead-agent.
-    uses: petry-projects/.github-private/.github/workflows/dev-lead-reusable.yml@dev-lead/stable  # NOSONAR(githubactions:S7637) first-party channel ref
+    uses: petry-projects/.github-private/.github/workflows/dev-lead-reusable.yml@dev-lead/v1-stable  # NOSONAR(githubactions:S7637) first-party channel ref
     with:
-      agent_ref: dev-lead/stable
+      agent_ref: dev-lead/v1-stable
     secrets: inherit  # NOSONAR(githubactions:S7635) first-party trusted reusable
     permissions:
       contents: write