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_sftp_read.3

@@ -0,0 +1,47 @@
+.\" Copyright (C) The libssh2 project and its contributors.
+.\" SPDX-License-Identifier: BSD-3-Clause
+.TH libssh2_sftp_read 3 "1 Jun 2007" "libssh2 0.15" "libssh2"
+.SH NAME
+libssh2_sftp_read - read data from an SFTP handle
+.SH SYNOPSIS
+.nf
+#include <libssh2.h>
+#include <libssh2_sftp.h>
+
+ssize_t
+libssh2_sftp_read(LIBSSH2_SFTP_HANDLE *handle,
+                  char *buffer, size_t buffer_maxlen);
+.fi
+.SH DESCRIPTION
+\fIhandle\fP is the SFTP File Handle as returned by
+.BR libssh2_sftp_open_ex(3)
+
+\fIbuffer\fP is a pointer to a pre-allocated buffer of at least
+
+\fIbuffer_maxlen\fP bytes to read data into.
+
+Reads a block of data from an LIBSSH2_SFTP_HANDLE. This method is modelled
+after the POSIX
+.BR read(2)
+function and uses the same calling semantics.
+.BR libssh2_sftp_read(3)
+will attempt to read as much as possible however it may not fill all of buffer
+if the file pointer reaches the end or if further reads would cause the socket
+to block.
+.SH RETURN VALUE
+Number of bytes actually populated into buffer, 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_ALLOC\fP - An internal memory allocation call failed.
+
+\fILIBSSH2_ERROR_SOCKET_SEND\fP - Unable to send data on socket.
+
+\fILIBSSH2_ERROR_SOCKET_TIMEOUT\fP -
+
+\fILIBSSH2_ERROR_SFTP_PROTOCOL\fP - An invalid SFTP protocol response was
+received on the socket, or an SFTP operation caused an errorcode to be
+returned by the server.
+.SH SEE ALSO
+.BR libssh2_sftp_open_ex(3)
+.BR libssh2_sftp_read(3)