Publish training skills collection

setup-skills.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+skills_dir="${CODEX_SKILLS_DIR:-$HOME/.codex/skills}"
+dry_run=0
+
+usage() {
+  printf 'Usage: %s [--dry-run]\n' "$(basename "$0")"
+  printf 'Create symlinks for this repo'\''s skill directories in %s.\n' "$skills_dir"
+}
+
+case "${1:-}" in
+  "")
+    ;;
+  --dry-run|-n)
+    dry_run=1
+    ;;
+  --help|-h)
+    usage
+    exit 0
+    ;;
+  *)
+    usage >&2
+    exit 2
+    ;;
+esac
+
+run() {
+  if (( dry_run )); then
+    printf 'DRY RUN:'
+    printf ' %q' "$@"
+    printf '\n'
+  else
+    "$@"
+  fi
+}
+
+if (( dry_run )); then
+  printf 'DRY RUN: mkdir -p %q\n' "$skills_dir"
+else
+  mkdir -p "$skills_dir"
+fi
+
+found=0
+
+while IFS= read -r -d '' skill_file; do
+  found=1
+  skill_path="$(dirname "$skill_file")"
+  skill_name="$(basename "$skill_path")"
+  link_path="$skills_dir/$skill_name"
+
+  if [[ -L "$link_path" ]]; then
+    current_target="$(readlink "$link_path")"
+    if [[ "$current_target" == "$skill_path" ]]; then
+      printf 'Already linked: %s -> %s\n' "$link_path" "$skill_path"
+    else
+      printf 'Skipping existing symlink: %s -> %s\n' "$link_path" "$current_target"
+    fi
+    continue
+  fi
+
+  if [[ -e "$link_path" ]]; then
+    printf 'Skipping existing path: %s\n' "$link_path"
+    continue
+  fi
+
+  run ln -s "$skill_path" "$link_path"
+  if (( dry_run )); then
+    printf 'Would link: %s -> %s\n' "$link_path" "$skill_path"
+  else
+    printf 'Linked: %s -> %s\n' "$link_path" "$skill_path"
+  fi
+done < <(find "$repo_root" -mindepth 2 -maxdepth 2 -name SKILL.md -print0 | sort -z)
+
+if (( ! found )); then
+  printf 'No skill directories found under %s\n' "$repo_root" >&2
+  exit 1
+fi