fix(ci): make docs spellcheck fallback deterministic

package.json

@@ -70,8 +70,8 @@
     "docs:check-links": "node scripts/docs-link-audit.mjs",
     "docs:dev": "cd docs && mint dev",
     "docs:list": "node scripts/docs-list.js",
-    "docs:spellcheck": "if command -v codespell >/dev/null 2>&1; then codespell README.md docs --skip='*.png,*.jpg,*.jpeg,*.gif,*.svg' -D - -D scripts/codespell-dictionary.txt -I scripts/codespell-ignore.txt; else pnpm dlx codespell README.md docs --skip='*.png,*.jpg,*.jpeg,*.gif,*.svg' -D - -D scripts/codespell-dictionary.txt -I scripts/codespell-ignore.txt; fi",
+    "docs:spellcheck": "bash scripts/docs-spellcheck.sh",
-    "docs:spellcheck:fix": "if command -v codespell >/dev/null 2>&1; then codespell README.md docs --skip='*.png,*.jpg,*.jpeg,*.gif,*.svg' -D - -D scripts/codespell-dictionary.txt -I scripts/codespell-ignore.txt -w; else pnpm dlx codespell README.md docs --skip='*.png,*.jpg,*.jpeg,*.gif,*.svg' -D - -D scripts/codespell-dictionary.txt -I scripts/codespell-ignore.txt -w; fi",
+    "docs:spellcheck:fix": "bash scripts/docs-spellcheck.sh --write",
     "format": "oxfmt --write",
     "format:all": "pnpm format && pnpm format:swift",
     "format:check": "oxfmt --check",

scripts/codespell-ignore.txt

@@ -1,2 +1,9 @@
 iTerm
 FO
+Nam
+Lins
+Vai
+OptionA
+CAF
+overlayed
+re-use

scripts/docs-spellcheck.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+mode="${1:-}"
+write_flag=()
+if [[ "$mode" == "--write" ]]; then
+  write_flag=(-w)
+fi
+
+args=(
+  README.md
+  docs
+  --skip=*.png,*.jpg,*.jpeg,*.gif,*.svg
+  -D
+  -
+  -D
+  scripts/codespell-dictionary.txt
+  -I
+  scripts/codespell-ignore.txt
+  "${write_flag[@]}"
+)
+
+if command -v codespell >/dev/null 2>&1; then
+  codespell "${args[@]}"
+  exit 0
+fi
+
+if command -v python3 >/dev/null 2>&1; then
+  python3 -m pip install --user --disable-pip-version-check --break-system-packages codespell >/dev/null 2>&1 || \
+    python3 -m pip install --user --disable-pip-version-check codespell >/dev/null 2>&1
+
+  user_bin="$(python3 - <<'PY'
+import site
+print(f"{site.USER_BASE}/bin")
+PY
+)"
+  if [[ -x "${user_bin}/codespell" ]]; then
+    "${user_bin}/codespell" "${args[@]}"
+    exit 0
+  fi
+fi
+
+echo "codespell unavailable: install codespell or python3" >&2
+exit 1