Add encrypted WWW-9 context migration backup

.gitattributes

@@ -249,3 +249,4 @@ ADA/benchmarks/temporal_train/CLEVRER/executor/data/parsed_programs/mc_1000q_400
 ADA/benchmarks/temporal_train/CLEVRER/executor/data/parsed_programs/mc_parsed_prog_1000_test.json filter=lfs diff=lfs merge=lfs -text
 ADA/benchmarks/temporal_train/CLEVRER/executor/data/parsed_programs/oe_1000pg_train_new.json filter=lfs diff=lfs merge=lfs -text
 ADA/benchmarks/temporal_train/CLEVRER/executor/data/parsed_programs/oe_1000pg_val_new.json filter=lfs diff=lfs merge=lfs -text
+WWW-9-5.6Sol-context-20261006/WWW-9-5.6Sol-context-20261006.zip.enc filter=lfs diff=lfs merge=lfs -text

WWW-9-5.6Sol-context-20261006/README.txt

@@ -0,0 +1,32 @@
+WWW-9-5.6Sol — encrypted context migration backup
+Date: 2026-10-06
+
+This directory contains only an encrypted migration archive and decryption aids.
+The password is supplied separately and is NOT stored in this repository.
+
+Mac 解密步骤
+1. 将本目录的 5 个文件下载到同一个文件夹。
+2. 在终端进入该文件夹，运行：
+
+   bash decrypt-on-mac.sh
+
+3. 按提示粘贴单独收到的密码。输入不会显示。
+4. 脚本校验、解密后生成 WWW-9-5.6Sol-context-20261006.zip。
+5. 解压 ZIP。先在目标 Mac 登录 Codex 并退出应用，再进入解压目录运行：
+
+   python3 restore_context.py
+
+6. 重新打开 Codex，找到 WWW-9-5.6Sol 继续聊天。
+
+也可以直接使用 macOS 自带的 OpenSSL 解密：
+
+/usr/bin/openssl enc -d -aes-256-cbc -pbkdf2 -iter 200000 -md sha256 -in WWW-9-5.6Sol-context-20261006.zip.enc -out WWW-9-5.6Sol-context-20261006.zip
+shasum -a 256 -c WWW-9-5.6Sol-context-20261006.zip.sha256
+
+Encryption: AES-256-CBC; salted OpenSSL enc format; PBKDF2-HMAC-SHA256,
+200,000 iterations; randomly generated password delivered separately.
+The decrypt helper verifies both the downloaded encrypted file and the restored ZIP.
+The full encryption/decryption round trip was verified before uploading.
+
+Original ZIP SHA-256:
+714831308e36e0320423a1688b8f8161d2da1ec355d31866ab34769e04eb1350

WWW-9-5.6Sol-context-20261006/WWW-9-5.6Sol-context-20261006.zip.enc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:accf733d5c279684093d90bf51c8ffba1154916a5620aa74dbeaefccd9aac973
+size 757190864

WWW-9-5.6Sol-context-20261006/WWW-9-5.6Sol-context-20261006.zip.enc.sha256

@@ -0,0 +1 @@
+accf733d5c279684093d90bf51c8ffba1154916a5620aa74dbeaefccd9aac973  WWW-9-5.6Sol-context-20261006.zip.enc

WWW-9-5.6Sol-context-20261006/WWW-9-5.6Sol-context-20261006.zip.sha256

@@ -0,0 +1 @@
+714831308e36e0320423a1688b8f8161d2da1ec355d31866ab34769e04eb1350  WWW-9-5.6Sol-context-20261006.zip

WWW-9-5.6Sol-context-20261006/decrypt-on-mac.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+set -euo pipefail
+umask 077
+cd -- "$(dirname -- "$0")"
+
+encrypted='WWW-9-5.6Sol-context-20261006.zip.enc'
+output='WWW-9-5.6Sol-context-20261006.zip'
+expected='714831308e36e0320423a1688b8f8161d2da1ec355d31866ab34769e04eb1350'
+
+if [[ -e "$output" ]]; then
+  actual=$(shasum -a 256 "$output" | awk '{print $1}')
+  if [[ "$actual" == "$expected" ]]; then
+    echo '已存在校验通过的 ZIP，可以直接解压。'
+    exit 0
+  fi
+  echo '同名 ZIP 已存在且校验不匹配，请先移走它再运行。' >&2
+  exit 1
+fi
+
+shasum -a 256 -c "$encrypted.sha256"
+temporary=$(mktemp './WWW9-decrypt.XXXXXXXX')
+trap 'rm -f -- "$temporary"' EXIT
+echo '请输入在聊天中单独收到的解密密码（输入不会显示）：'
+/usr/bin/openssl enc -d -aes-256-cbc -pbkdf2 -iter 200000 -md sha256 \
+  -in "$encrypted" -out "$temporary"
+actual=$(shasum -a 256 "$temporary" | awk '{print $1}')
+if [[ "$actual" != "$expected" ]]; then
+  echo '解密后的文件校验失败。' >&2
+  exit 1
+fi
+mv -- "$temporary" "$output"
+trap - EXIT
+echo "解密及 SHA-256 校验通过：$output"
+echo '解压 ZIP 后，请按照包内 README.txt 恢复聊天。'