初始提交：terminalX 可运行态（M0/M1/M1.5 已真机验证）

- M0: libghostty SSH 终端（渲染/输入/连接）+ 白屏修复(OutputGate) + 会话状态机/自动重连
- M1: tsnet 用户态组网 + SSH-over-tsnet(fd 桥)，shell 级真机验证；R5(Go+gvisor+C+++Swift 同进程) retire
- M1.5: tmux -CC 原生 tab（MVP）
- 结构: packages/(TXCore·TXTransport), apps/TerminalX, vendor/(libghostty-spm/libssh2/mbedtls/tsnet-bridge), artifacts/
- 文档: CLAUDE.md + docs/HANDOFF.md（新会话入口）
- 环境: 认证代理→依赖 vendor 本地化；Go 在 ~/.local/go；仅模拟器/未签名
- 待续: M2 mosh, tmux 多 pane, M4 安全(host key/SE)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

vendor/mbedtls/programs/psa/key_ladder_demo.sh

@@ -0,0 +1,51 @@
+#!/bin/sh
+#
+# Copyright The Mbed TLS Contributors
+# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+
+. "${0%/*}/../../framework/scripts/demo_common.sh"
+
+msg <<'EOF'
+This script demonstrates the use of the PSA cryptography interface to
+create a master key, derive a key from it and use that derived key to
+wrap some data using an AEAD algorithm.
+EOF
+
+depends_on MBEDTLS_SHA256_C MBEDTLS_MD_C MBEDTLS_AES_C MBEDTLS_CCM_C MBEDTLS_PSA_CRYPTO_C MBEDTLS_FS_IO
+
+program="${0%/*}"/key_ladder_demo
+
+if [ -e master.key ]; then
+    echo "# Reusing the existing master.key file."
+else
+    files_to_clean="$files_to_clean master.key"
+    run "Generate a master key." \
+        "$program" generate master=master.key
+fi
+
+files_to_clean="$files_to_clean input.txt hello_world.wrap"
+echo "Here is some input. See it wrapped." >input.txt
+run "Derive a key and wrap some data with it." \
+    "$program" wrap master=master.key label=hello label=world \
+               input=input.txt output=hello_world.wrap
+
+files_to_clean="$files_to_clean hello_world.txt"
+run "Derive the same key again and unwrap the data." \
+    "$program" unwrap master=master.key label=hello label=world \
+               input=hello_world.wrap output=hello_world.txt
+run "Compare the unwrapped data with the original input." \
+    cmp input.txt hello_world.txt
+
+files_to_clean="$files_to_clean hellow_orld.txt"
+run_bad "Derive a different key and attempt to unwrap the data." \
+  "$program" unwrap master=master.key input=hello_world.wrap output=hellow_orld.txt label=hellow label=orld
+
+files_to_clean="$files_to_clean hello.key"
+run "Save the first step of the key ladder, then load it as a master key and construct the rest of the ladder." \
+    "$program" save master=master.key label=hello \
+               input=hello_world.wrap output=hello.key
+run "Check that we get the same key by unwrapping data made by the other key." \
+    "$program" unwrap master=hello.key label=world \
+               input=hello_world.wrap output=hello_world.txt
+
+cleanup