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/libssh2/docs/libssh2_channel_close.3

@@ -0,0 +1,29 @@
+.\" Copyright (C) The libssh2 project and its contributors.
+.\" SPDX-License-Identifier: BSD-3-Clause
+.TH libssh2_channel_close 3 "1 Jun 2007" "libssh2 0.15" "libssh2"
+.SH NAME
+libssh2_channel_close - close a channel
+.SH SYNOPSIS
+.nf
+#include <libssh2.h>
+
+int
+libssh2_channel_close(LIBSSH2_CHANNEL *channel);
+.fi
+.SH DESCRIPTION
+\fIchannel\fP - active channel stream to set closed status on.
+
+Close an active data channel. In practice this means sending an SSH_MSG_CLOSE
+packet to the remote host which serves as instruction that no further data
+will be sent to it. The remote host may still send data back until it sends
+its own close message in response. To wait for the remote end to close its
+connection as well, follow this command with
+.BR libssh2_channel_wait_closed(3)
+.SH RETURN VALUE
+Return 0 on success or negative on failure. It returns
+LIBSSH2_ERROR_EAGAIN when it would otherwise block. While
+LIBSSH2_ERROR_EAGAIN is a negative number, it is not really a failure per se.
+.SH ERRORS
+\fILIBSSH2_ERROR_SOCKET_SEND\fP - Unable to send data on socket.
+.SH SEE ALSO
+.BR libssh2_channel_open_ex(3)