[Bug]: Sub-Agents Use Orchestrator Model After Orchestrator Using a Skill

[hesprs]

What happened, and what did you expect?

I told the Orchestrator (gpt-5.4) to use a skill, it used the skill and delegated an explorer. In my config, the explorer is gpt-5.4-mini, however, both OpenCode UI and my API usage log showed the explorer was gpt-5.4. I experimented several times and the bug is reproducible.

Steps to reproduce

1. Enter the prompt below to Orchestrator:

Use (any skill name) skill, then delegate an explorer and tell it to do nothing.
Don't do anything real, I'm testing whether the agents and skills are working.

2. Wait for the model to delegate.
3. Ctrl+X Down to view subagents.
4. The model in OpenCode TUI is gpt-5.4, not gpt-5.4-mini as configured.

Where The Bug Does Not Appear

Delegate without using skills on beforehand:

/preset command returns correct config:

oh-my-opencode.json

{
	"$schema": "https://unpkg.com/oh-my-opencode-slim@latest/oh-my-opencode-slim.schema.json",
	"preset": "best",
	"presets": {
		"best": {
			"orchestrator": {
				"model": "openai/gpt-5.4",
				"skills": ["*"],
				"mcps": ["*"]
			},
			"oracle": {
				"model": "openai/gpt-5.4",
				"skills": [],
				"mcps": [],
				"variant": "high"
			},
			"designer": {
				"model": "google/gemini-3.1-pro-preview",
				"skills": ["agent-browser"],
				"mcps": []
			},
			"explorer": {
				"model": "openai/gpt-5.4-mini",
				"skills": [],
				"variant": "low",
				"mcps": []
			},
			"librarian": {
				"model": "openai/gpt-5.4-mini",
				"skills": [],
				"variant": "low",
				"mcps": ["websearch", "context7", "grep_app"]
			},
			"fixer": {
				"model": "openai/gpt-5.4-mini",
				"variant": "low",
				"skills": [],
				"mcps": []
			}
		}
	},
	"todoContinuation": {
		"autoEnable": false
	},
	"balanceProviderUsage": false,
	"fallback": { "enabled": false },
	"council": {
		"master": { "model": "openai/gpt-5.4" },
		"presets": {
			"default": {
				"alpha": { "model": "google/gemini-3.1-pro-preview" }
			}
		}
	}
}

OpenCode version

1.14.22

oh-my-opencode-slim version

1.0.3

Operating system

Linux (NixOS 26.05)

Logs, screenshots, or extra context

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[alvinunreal]

Nice find

[LoneWolf36]

What terminal do you use? @hesprs

[hesprs]

@LoneWolf36

The terminal emulator is Kitty, pretty common among Linux users.
I use Hyprland as window manager, it can make the terminal background translucent.