sdk: server.close() does not terminate underlying opencode process when run via wrappers (e.g., Deno)

[sigmaSd]

Description

Currently, calling server.close() in the SDK only terminates the immediate process wrapper (like deno) but leaves the actual opencode binary running as an orphaned process. This results in the network port remaining occupied and requiring manual cleanup (e.g., fuser -k).

Plugins

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OpenCode version

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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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[github-actions]

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

• ctrl+c fails to terminate opencode-web service, process remains running in background #21505: Same symptom — the underlying opencode process is not terminated and the port remains occupied after the wrapper/caller stops. That issue covers ctrl+c on the web command; yours covers server.close() via the SDK with Deno wrappers.
• opencode-cli sidecar process not terminated when opencode electron desktop is closed #17068: Same class of problem — opencode-cli sidecar process not terminated when the parent (Electron) is closed, leaving orphaned processes.

If your issue is specifically about the SDK's server.close() not propagating a termination signal to the spawned opencode binary (rather than the web command or desktop wrapper), it may be worth keeping open as a distinct SDK-specific tracking issue. Otherwise, consider commenting on one of the above.