Summary

Adds an SSH remote workspace RFC with a --dry-run bootstrap. The reasonix code ssh://user@host/path --dry-run command parses the SSH URI, checks local SSH availability, and prints planned execution steps without executing any remote commands or making network connections. Without --dry-run, an explicit error message recommends running Reasonix on the remote host with an SSH tunnel for the dashboard. GPU passthrough (#2141) is tracked separately.

概述

新增 SSH 远程工作区 RFC 和 --dry-run 引导。reasonix code ssh://user@host/path --dry-run 命令解析 SSH URI，检查本地 SSH 可用性，打印计划执行步骤，不执行任何远程命令也不建立网络连接。无 --dry-run 时显式报错并建议在远程主机上运行 Reasonix 配合 SSH 隧道访问 dashboard。GPU passthrough (#2141) 单独跟踪。

Key Files

• src/cli/ssh-remote.ts (new) — parseSshUri(), probeSsh(), generateSshDryRunReport()
• src/cli/index.ts — --dry-run option, SSH URI handling, rejection message
• tests/ssh-remote.test.ts (new) — URI parsing, report content, probe tests

Depends On / 依赖

This PR is #5 in a 5-PR series:

• PR feat: Allow user to press tab and add aditional context when denying. #1: Cache Diagnostics v1
• PR feat: event-log kernel — durable Event sidecar + replay-capable consumer #2: MCP Cache-Stable Canonicalization
• PR feat(cli): reasonix events <name> — first user-facing consumer of the event log #3: Reliable Large Delete Primitive (delete_range)
• PR 👋 Welcome to Reasonix · how to get involved #4: AST-Aware Delete (delete_symbol)

Test Plan

• SSH URI parser: full URI, no user, no path, host-only, invalid formats
• Local SSH probe
• Dry-run report content: RFC banner, planned steps, recommendations
• No network side effects
• SSH binary missing warning

Verification

npm run lint      → 0 errors
npx vitest run tests/ssh-remote.test.ts → 14 passed