Function host_from_str 

pub fn host_from_str(value: Option<&str>) -> Host

The host named by RE_GHIDRA_HOST. Unset or anything but exactly "opencode" means Host::Claude: the Claude front has never read this variable, so defaulting there keeps every existing install on today’s behavior. OpenCode sets the variable in opencode.jsonc’s mcp.servers.ghidra.environment (Task 5).