diff --git a/.github/scripts/apply-repo-settings.sh b/.github/scripts/apply-repo-settings.sh
new file mode 100644
index 00000000..6411911c
--- /dev/null
+++ b/.github/scripts/apply-repo-settings.sh
@@ -0,0 +1,83 @@
+#!/usr/bin/env bash
+# apply-repo-settings.sh — Idempotently apply required repository settings
+#
+# Enforces all settings required by the petry-projects org standard:
+#   https://github.com/petry-projects/.github/blob/main/standards/github-settings.md#repository-settings--standard-defaults
+#
+# Usage:
+#   GH_TOKEN=<admin-token> bash .github/scripts/apply-repo-settings.sh
+#
+# The script is safe to run multiple times (idempotent). It fetches and prints
+# the current relevant settings, applies the required settings using the
+# GitHub REST API, and prints the resulting settings response.
+#
+# Requirements:
+#   - GH_TOKEN must have administration:write scope (repo admin role)
+#   - gh CLI must be installed
+#   - jq must be installed
+#
+# The org-level script (petry-projects/.github/scripts/apply-repo-settings.sh)
+# is the canonical tool for managing settings across all repos. This script
+# exists as a repo-local reference and fallback for the markets repository.
+
+set -euo pipefail
+
+REPO="petry-projects/markets"
+
+if [ -z "${GH_TOKEN:-}" ]; then
+  echo "ERROR: GH_TOKEN is required with administration:write scope" >&2
+  exit 1
+fi
+
+if ! command -v jq &>/dev/null; then
+  echo "ERROR: jq is required but not found in PATH" >&2
+  exit 1
+fi
+
+export GH_TOKEN
+
+echo "Fetching current settings for $REPO ..."
+current=$(gh api "repos/$REPO" --jq '{
+  allow_auto_merge: .allow_auto_merge,
+  delete_branch_on_merge: .delete_branch_on_merge,
+  allow_squash_merge: .allow_squash_merge,
+  allow_merge_commit: .allow_merge_commit,
+  allow_rebase_merge: .allow_rebase_merge,
+  has_discussions: .has_discussions,
+  has_issues: .has_issues,
+  has_wiki: .has_wiki,
+  squash_merge_commit_title: .squash_merge_commit_title,
+  squash_merge_commit_message: .squash_merge_commit_message
+}')
+
+echo "Current settings:"
+echo "$current" | jq .
+
+echo ""
+echo "Applying required settings to $REPO ..."
+gh api -X PATCH "repos/$REPO" \
+  -F delete_branch_on_merge=true \
+  -F allow_auto_merge=true \
+  -F allow_squash_merge=true \
+  -F allow_merge_commit=true \
+  -F allow_rebase_merge=true \
+  -F has_discussions=true \
+  -F has_issues=true \
+  -F has_wiki=false \
+  -f squash_merge_commit_title=PR_TITLE \
+  -f squash_merge_commit_message=COMMIT_MESSAGES \
+  --jq '{
+    delete_branch_on_merge,
+    allow_auto_merge,
+    allow_squash_merge,
+    allow_merge_commit,
+    allow_rebase_merge,
+    has_discussions,
+    has_issues,
+    has_wiki,
+    squash_merge_commit_title,
+    squash_merge_commit_message
+  }' | jq .
+
+echo ""
+echo "Done — repository settings applied: https://github.com/$REPO/settings"