team_spawn fails on OpenCode 2.0.29: ctx.permission.rules is not a function #45

Version: opencode-ensemble 0.18.0, OpenCode 2.0.29 (server), Linux

What happens:
team_spawn always fails with:

Failed to create session for teammate "scout": ctx.permission.rules is not a function. (In 'ctx.permission.rules({ sessionID: created.id, permissions })', 'ctx.permission.rules' is undefined)

Team creation, the task board (tasks_add/list), and team_cleanup all work — only spawn is broken.

Where: src/v2-client.ts line ~122:

const created = await ctx.session.create(input)
if (permissions) {
  await ctx.permission.rules({ sessionID: created.id, permissions })
}

ctx.permission.rules no longer exists on the V2 plugin context in 2.0.29 (the call throws is not a function, meaning the property is undefined).

Local workaround I tested: replacing the call with

await ctx.session.update({ sessionID: created.id, permissions })

makes team_spawn succeed and the teammate session starts (spawns fine afterwards).

Ask: port the permission re-assertion to the current V2 context API (or guard it if the API moved elsewhere), so ensemble works on current OpenCode 2.0.x servers. Happy to test a fixed release.