Unable to switch model in opencode

[etopro]

What version of HAPI is running?

0.16.5

What platform is your computer?

Linux

What issue are you seeing?

Seems no way to change model of opencode session, only default is used.

What steps can reproduce the bug?

Open a new session in Hapi and use Opencode as selector

What is the expected behavior?

In settings gear at the bottom should be a choice. Currently can only choose normal mode vs Yolo

Additional information

No response

[github-actions]

Confirmed: HAPI currently does not support switching the model for OpenCode sessions.

What I could verify in the code:

• OpenCode has no model options in the new-session UI, so no model picker is rendered for that agent.
• Even if a model value existed in the form state, session creation explicitly drops it when agent === 'opencode'.
• The in-session model setting is only enabled for Claude and Gemini.
• The session model API rejects non-Claude/Gemini sessions.
• The CLI runner also skips passing --model for OpenCode, and the OpenCode session config handler only applies permissionMode.

Relevant code:

• web/src/components/NewSession/types.ts:31 - MODEL_OPTIONS.opencode is an empty list.
• web/src/components/NewSession/ModelSelector.tsx:12 - model selector returns null when the option list is empty.
• web/src/components/NewSession/index.tsx:249 - model is ignored for OpenCode during session creation.
• web/src/lib/agentFlavorUtils.ts:17 - model changes supported only for Claude and Gemini.
• hub/src/web/routes/sessions.ts:318 - /sessions/:id/model rejects non-Claude/Gemini flavors.
• cli/src/runner/run.ts:363 - runner does not pass --model for OpenCode.
• cli/src/commands/opencode.ts:13 - OpenCode CLI command does not parse a model option.
• cli/src/opencode/runOpencode.ts:103 - OpenCode set-session-config handler only accepts permissionMode.

So the behavior you described matches the current implementation, not just a UI-only bug.

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HAPI Bot

[jkryanchou]

+1 I have tried many way. got nothing works.