fix(tmux): handle serverUrl throw getter from upstream opencode refactor

[guazi04]

Summary

OpenCode upstream commit 89d6f60d (refactor(server): extract createApp function) changed PluginInput.serverUrl from Server.url() to a throw getter:

// opencode/src/plugin/index.ts
get serverUrl(): URL {
  throw new Error("Server URL is no longer supported in plugins")
}

This causes the entire oh-my-opencode plugin to crash during initialization because TmuxSessionManager constructor accesses ctx.serverUrl:

this.serverUrl = ctx.serverUrl?.toString() ?? `http://localhost:${defaultPort}`

Optional chaining (?.) does not prevent the throw — the getter executes on property access before the nullish check.

Impact: All agents, hooks, and tools fail to register. The plugin appears to load but silently crashes.

Fix

Wrap the serverUrl access in a try-catch, falling back to http://localhost:{port}:

try {
  this.serverUrl = ctx.serverUrl?.toString() ?? `http://localhost:${defaultPort}`
} catch {
  this.serverUrl = `http://localhost:${defaultPort}`
}

Notes

• The OpenCode change (89d6f60d) is not yet released (current npm is v1.2.17), but affects anyone running from source.
• This is a defensive fix — it preserves existing behavior when serverUrl is available, and gracefully degrades when it's not.

---

Summary by cubic

Prevent tmux subagent crash after upstream opencode made PluginInput.serverUrl a throwing getter. Guard ctx.serverUrl with try/catch and default to http://localhost:${OPENCODE_PORT || 4096} so agents, hooks, and tools register.

^{Written for commit 309a3e4. Summary will update on new commits.}

[github-actions]

All contributors have signed the CLA. Thank you! ✅
_{Posted by the CLA Assistant Lite bot.}

[cubic-dev-ai]

No issues found across 1 file

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Auto-approved: Defensive try-catch fix for an upstream breaking change; safely handles a throwing getter with a fallback and restores functionality without side effects.}

[guazi04]

recheck

[acamq]

Oh dear