Windows: opencode web/serve listens but does not accept HTTP connections under Bun #38220

Description

Description

On native Windows (PowerShell/cmd), opencode web and opencode serve print listening and netstat shows LISTENING, but HTTP clients cannot connect (curl timeout / browser hangs).

Reproduction

1. Windows 11, install opencode-ai via npm (or run from source with Bun)
2. Run opencode web --port 4096 --hostname 127.0.0.1
3. curl http://127.0.0.1:4096/ → connection timeout

Python http.server on the same machine works fine.

Expected

Browser/curl should receive HTTP 200 and load the Web UI.

Actual

Connection times out despite port showing LISTENING.

Environment

• OS: Windows 11
• opencode-ai: 1.18.4
• Bun: 1.3.14 (when running from source)

Plugins

No response

OpenCode version

No response

Steps to reproduce

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Screenshot and/or share link

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Operating System

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Terminal

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