TUI Command Shim Removal

Problem:

v1 keeps a deprecated api.command TUI plugin shim so older plugins do not fail during initialization
v2 should expose only the keymap command API
tests and fixtures should not encode legacy command behavior as expected behavior

Remove Public Types

In packages/plugin/src/tui.ts, remove:

TuiCommand
TuiCommandApi
TuiPluginApi.command

Keep api.keymap as the only TUI command registration and execution surface.

Remove Runtime Shim

Delete packages/kirincode/src/cli/cmd/tui/plugin/command-shim.ts.

In packages/kirincode/src/cli/cmd/tui/plugin/api.tsx, remove:

the createCommandShim import
the command: createCommandShim(...) field from createTuiApi(...)

In packages/kirincode/src/cli/cmd/tui/plugin/runtime.ts, remove:

the createCommandShim import
the command: createCommandShim(...) field from pluginApi(...)

Migration Target

Plugin authors should replace old calls with keymap calls:

api.keymap.registerLayer({
  commands: [
    {
      name: "plugin.command",
      title: "Plugin Command",
      namespace: "palette",
      slashName: "plugin",
      run() {
        api.ui.dialog.clear()
      },
    },
  ],
  bindings: [{ key: "ctrl+shift+p", cmd: "plugin.command" }],
})

Direct replacements:

api.command.register(cb) -> api.keymap.registerLayer({ commands, bindings })
api.command.trigger(name) -> api.keymap.dispatchCommand(name)
api.command.show() -> api.keymap.dispatchCommand("command.palette.show")
onSelect(dialog) -> use api.ui.dialog from the plugin API closure

Verification

After removal, run from package directories:

bun typecheck in packages/plugin
bun typecheck in packages/opencode
TUI plugin loader tests in packages/opencode if runtime plugin API wiring changed