build: omit issue references to other repositories

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: Planeshifter

.github/workflows/scripts/generate_pr_commit_message

@@ -220,8 +220,25 @@ main() {
 	# Extract 'Signed-off-by' lines from commits:
 	signed_off_bys=$(echo "$pr_commits" | jq -r '.[].commit.message' | grep -Eio 'Signed-off-by:.*' | sort -u)
 
-	# Extract linked issues from PR body (e.g., #123):
-	issue_numbers=$(echo "$pr_body" | grep -oE '#[0-9]+' | grep -oE '[0-9]+' | sort | uniq)
+	# Extract linked issues from PR body:
+	issue_numbers=$(
+		echo "$pr_body" |
+		# Handle GitHub-supported issue references to stdlib-js/stdlib:
+		#
+		#   - https://github.com/stdlib-js/stdlib/issues/123
+		#   - stdlib-js/stdlib#123
+		#   - #123 (**not** preceded by a word‑char, “/”, or “>”)
+		grep -oE 'https://github\.com/stdlib-js/stdlib/issues/[0-9]+|stdlib-js/stdlib#[0-9]+|(^|[^[:alnum:]_/>])#[0-9]+' |
+		# Strip the prefix so we’re left with the bare issue number:
+		sed -E '
+		s@https://github\.com/stdlib-js/stdlib/issues/([0-9]+)@\1@;
+		s@stdlib-js/stdlib#([0-9]+)@\1@;
+		s@(^|[^[:alnum:]_/>])#([0-9]+)@\2@
+    	' |
+		# Remove duplicates:
+		sort -u |
+		uniq
+	)
 	closes_issues=""
 	ref_issues=""