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Add --mdns-domain flag to customize mDNS hostname #8335

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opened 2026-02-16 18:09:42 -05:00 by yindo · 1 comment
yindo commented 2026-02-16 18:09:42 -05:00
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Originally created by @luiz290788 on GitHub (Feb 2, 2026).

Originally assigned to: @adamdotdevin on GitHub.

Summary

When using opencode web --mdns, the server is always advertised as opencode.local. It would be useful to allow customizing this domain name via a flag.

Use Case

When running multiple OpenCode instances on the same network, or when wanting to use a more descriptive name for a specific project/machine, being able to customize the mDNS domain would help distinguish between servers.

Proposed Solution

Add a --mdns-domain flag (or similar) to override the default opencode.local hostname:

opencode web --mdns --mdns-domain myproject.local

And support it in the config file as well:

{
  "server": {
    "mdns": true,
    "mdnsDomain": "myproject.local"
  }
}

Alternatives Considered

  • Using --hostname with a specific IP and configuring DNS/hosts manually, but this defeats the purpose of mDNS auto-discovery.
Originally created by @luiz290788 on GitHub (Feb 2, 2026). Originally assigned to: @adamdotdevin on GitHub. ## Summary When using `opencode web --mdns`, the server is always advertised as `opencode.local`. It would be useful to allow customizing this domain name via a flag. ## Use Case When running multiple OpenCode instances on the same network, or when wanting to use a more descriptive name for a specific project/machine, being able to customize the mDNS domain would help distinguish between servers. ## Proposed Solution Add a `--mdns-domain` flag (or similar) to override the default `opencode.local` hostname: ```bash opencode web --mdns --mdns-domain myproject.local ``` And support it in the config file as well: ```json { "server": { "mdns": true, "mdnsDomain": "myproject.local" } } ``` ## Alternatives Considered - Using `--hostname` with a specific IP and configuring DNS/hosts manually, but this defeats the purpose of mDNS auto-discovery.
yindo added the web label 2026-02-16 18:09:42 -05:00
yindo closed this issue 2026-02-16 18:09:43 -05:00
yindo commented 2026-02-16 18:09:43 -05:00
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@github-actions[bot] commented on GitHub (Feb 2, 2026):

This issue might be a duplicate of existing issues. Please check:

  • #9040: mDNS service not discoverable with correct hostname (already addressed hostname/discovery issues)
  • #7629: Desktop app and terminal should connect to existing server instead of starting a new one when port is already in use (relates to running multiple instances on the same network)

Feel free to ignore if none of these address your specific case.

@github-actions[bot] commented on GitHub (Feb 2, 2026): This issue might be a duplicate of existing issues. Please check: - #9040: mDNS service not discoverable with correct hostname (already addressed hostname/discovery issues) - #7629: Desktop app and terminal should connect to existing server instead of starting a new one when port is already in use (relates to running multiple instances on the same network) Feel free to ignore if none of these address your specific case.
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Reference: anomalyco/opencode#8335
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