#!/usr/bin/env bash
set -euo pipefail

# Enforces agentskills.io's skill-authoring.md guidance: keep SKILL.md under 500
# lines and 5,000 tokens, so the full body doesn't crowd out conversation
# history and other active skills once loaded into context. Vale can't express
# a whole-file length ceiling (its checks operate on text patterns, not raw
# file size), so this is a plain script instead of a Vale rule.
#
# Token counts aren't computed exactly here — word count (`wc -w`) is used as
# a proxy. For English prose this typically runs somewhat below true BPE token
# counts, so a 5,000-word file is already at or past 5,000 tokens in practice;
# treat this as a conservative, cheap approximation, not an exact measure.

MAX_LINES=500
MAX_WORDS=5000
FAIL=0

for f in "$@"; do
  [[ -f "$f" ]] || continue

  lines=$(wc -l < "$f")
  if (( lines > MAX_LINES )); then
    echo "ERROR: $f has $lines lines, exceeding the $MAX_LINES-line ceiling (agentskills.io skill-authoring.md)" >&2
    FAIL=1
  fi

  words=$(wc -w < "$f")
  if (( words > MAX_WORDS )); then
    echo "ERROR: $f has $words words (proxy for tokens), exceeding the $MAX_WORDS-token ceiling (agentskills.io skill-authoring.md)" >&2
    FAIL=1
  fi
done

exit $FAIL