This release is a major internal rebuild of hostc's tunnel stack.

hostc is now split into clearer layers:

• @hostc/protocol: the v4 protocol source of truth
• @hostc/client: the embeddable client SDK
• @hostc/server: the Cloudflare Worker + Durable Object tunnel server
• hostc CLI: a thin product layer built on top of the SDK

Highlights

• Added the new v4 tunnel protocol with binary frames, streams, data channels, flow-control credits, and explicit close codes.
• Added the new @hostc/client SDK used by the CLI and future desktop, daemon, and custom integrations.
• Reworked the CLI around the SDK for a cleaner protocol boundary.
• Improved CLI startup, success, reconnect, and error output.
• Added explicit protocol upgrade guidance when the CLI and server protocol are incompatible.
• Improved WebSocket and Vite/HMR reliability through stream/data-channel fixes.
• Added local/staging E2E, stress, load, benchmark, and refactor audit workflows.
• Split the web app into a separate Workers Static Assets deployment.
• Added branded public tunnel error pages for browser users.

Breaking / compatibility

This release intentionally removes fallback compatibility with older tunnel protocols.

If you see a protocol compatibility error, upgrade the CLI:

npm install -g hostc@latest

For one-off usage, prefer:

npx hostc@latest 3000

Validation

This release was validated with:

• unit tests for protocol, client SDK, server, and CLI
• local E2E
• local stress test
• staging deploy + preflight
• staging E2E
• remote load/stress test
• protocol benchmark
• refactor audit

修复

• 修复 CLI 在 Node.js 18/20 环境下因使用全局 `WebSocket` 而启动即崩溃的问题，现统一通过 `ws` 包创建隧道连接

CLI 1.2.5

Recommended update for all CLI users.

Install:

npm install -g hostc@latest

Highlights since v1.2.2:

• Added an interactive update reminder when a newer CLI version is available.
• Improved tunnel protocol compatibility between newer and older CLI/Worker versions.
• Added sanitized fatal error reporting for production CLI failures.
  • Opt out with HOSTC_DISABLE_ERROR_REPORTING=1 or DO_NOT_TRACK=1.
• Changed the default local service host from 127.0.0.1 to localhost.
  • Use --local-host 127.0.0.1 if you want the previous behavior.

CLI 1.2.2

• Fix CLI shutdown path so Ctrl-C no longer prints "Tunnel connection is unavailable"
• Improve response body flow control for large HTTP streams such as video/file traffic