feat: skills - gate auto-tmux jsonl fields

skills/auto-tmux/scripts/check-jsonl.sh

@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+# check-jsonl: lightweight JSONL field gate without jq dependency.
+set -euo pipefail
+
+usage() {
+  cat <<'EOF'
+check-jsonl: validate JSONL-like lines contain required fields
+
+Usage:
+  check-jsonl.sh FILE [--require-key KEY ...]
+
+Defaults:
+  Requires no fixed keys unless --require-key is provided.
+
+This is a lightweight gate: it checks non-empty lines look like JSON objects and
+contain required top-level key names. It does not replace a full JSON parser.
+EOF
+}
+
+die() {
+  printf 'error: %s\n' "$*" >&2
+  exit 1
+}
+
+file=""
+required_keys=()
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --require-key)
+      required_keys+=("${2:-}")
+      shift 2
+      ;;
+    -h|--help)
+      usage
+      exit 0
+      ;;
+    *)
+      if [[ -z "$file" ]]; then
+        file="$1"
+        shift
+      else
+        die "unknown option: $1"
+      fi
+      ;;
+  esac
+done
+
+[[ -n "$file" ]] || die "missing FILE"
+[[ -f "$file" ]] || die "file not found: $file"
+
+line_no=0
+checked=0
+while IFS= read -r line || [[ -n "$line" ]]; do
+  line_no=$((line_no + 1))
+  [[ -n "$line" ]] || continue
+  [[ "$line" =~ ^\{.*\}$ ]] || die "line $line_no is not a JSON object"
+  for key in "${required_keys[@]}"; do
+    [[ "$line" == *"\"$key\""* ]] || die "line $line_no missing key: $key"
+  done
+  checked=$((checked + 1))
+done < "$file"
+
+((checked > 0)) || die "no JSONL records found"
+printf 'jsonl ok: %s records=%s\n' "$file" "$checked"