#!/usr/bin/env bash
# 共用模块必须逐字节相同 —— 见 docs/PLUGIN-CONTRACT.md 第六节。
#
# 一侧改了另一侧没改，两个平台的行为就会悄悄分叉：同一封邮件在 opencode 那边
# 标了已读、在 DSH 那边没标，而两处代码看起来都"对"。
set -euo pipefail
A=plugins/opencode-mail-bridge
B=plugins/dsh-mail-bridge
fail=0
for f in relay-dedup inbox-format session-snapshot workspace model-scope catchup; do
  if ! diff -q "$A/lib/$f.js" "$B/lib/$f.js" >/dev/null 2>&1; then
    echo "共用模块已分叉：lib/$f.js" >&2
    diff "$A/lib/$f.js" "$B/lib/$f.js" | head -20 >&2
    fail=1
  fi
done
for f in inbox-format session-snapshot workspace model-scope catchup; do
  if ! diff -q "$A/test/$f.test.mjs" "$B/test/$f.test.mjs" >/dev/null 2>&1; then
    echo "共用测试已分叉：test/$f.test.mjs" >&2
    fail=1
  fi
done
[[ $fail -eq 0 ]] && echo "    共用模块两侧同源" || exit 1