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_session_methods.3

@@ -0,0 +1,31 @@
+.\" Copyright (C) The libssh2 project and its contributors.
+.\" SPDX-License-Identifier: BSD-3-Clause
+.TH libssh2_session_methods 3 "8 Nov 2021" "libssh2 1.11" "libssh2"
+.SH NAME
+libssh2_session_methods - return the currently active algorithms
+.SH SYNOPSIS
+.nf
+#include <libssh2.h>
+
+const char *
+libssh2_session_methods(LIBSSH2_SESSION *session, int method_type);
+.fi
+.SH DESCRIPTION
+\fIsession\fP - Session instance as returned by
+.BR libssh2_session_init_ex(3)
+
+\fImethod_type\fP - one of the method type constants: LIBSSH2_METHOD_KEX,
+LIBSSH2_METHOD_HOSTKEY, LIBSSH2_METHOD_CRYPT_CS, LIBSSH2_METHOD_CRYPT_SC,
+LIBSSH2_METHOD_MAC_CS, LIBSSH2_METHOD_MAC_SC, LIBSSH2_METHOD_COMP_CS,
+LIBSSH2_METHOD_COMP_SC, LIBSSH2_METHOD_LANG_CS, LIBSSH2_METHOD_LANG_SC,
+LIBSSH2_METHOD_SIGN_ALGO.
+
+Returns the actual method negotiated for a particular transport parameter.
+.SH RETURN VALUE
+Negotiated method or NULL if the session has not yet been started.
+.SH ERRORS
+\fILIBSSH2_ERROR_INVAL\fP - The requested method type was invalid.
+
+\fILIBSSH2_ERROR_METHOD_NONE\fP - no method has been set
+.SH SEE ALSO
+.BR libssh2_session_init_ex(3)