Host Methods: Direct Android Bridge for Aether Extensions - Aether Baimoqilin

aether.host.invoke() provides direct access to Android-side operations that aren’t yet covered by the state API or service registry. Use it for app-specific tasks like sending messages, opening screens, or executing Alpine or Termux commands.

API signature

readonly host: {
  invoke(method: string, args?: object): Promise<object>;
};

Host methods reference

Method	Purpose
`app.getState`	Read settings, sessions, draft, Skills, and runtime UI state
`app.setDraftInput`	Replace the composer text
`app.appendDraftInput`	Append text to the composer
`app.sendMessage`	Set optional text and submit, queue, or steer
`app.newChat`	Start a new draft conversation
`app.selectSession`	Select a session by ID
`app.openScreen`	Open `"chat"` or `"settings"`
`app.pauseGeneration`	Pause the current generation
`app.setReasoningEffort`	Change reasoning effort level
`app.setAgentMode`	Toggle Agent Mode on or off
`app.setModel`	Select a model by key
`app.notify`	Show an Android toast notification
`settings.get`	Read settings and providers
`settings.patch`	Patch supported settings
`runtime.execute`	Execute an arbitrary Alpine/Termux command

Code examples

// Read the current app state
const state = await aether.host.invoke("app.getState");

// Replace composer text
await aether.host.invoke("app.setDraftInput", { text: "Hello!" });

// Send a message immediately
await aether.host.invoke("app.sendMessage", { text: "Run the tests" });

// Start a new chat
await aether.host.invoke("app.newChat");

// Navigate to settings
await aether.host.invoke("app.openScreen", { screen: "settings" });

// Execute a shell command in Alpine
const result = await aether.host.invoke("runtime.execute", {
  command: "ls ~/.aether/extensions",
  environment: "alpine",
});

// Show a toast notification
await aether.host.invoke("app.notify", { message: "Task complete!" });

// Toggle agent mode
await aether.host.invoke("app.setAgentMode", { enabled: true });

// Switch model
await aether.host.invoke("app.setModel", {
  model_key: "<provider-config-id>::<model-id>",
});

Prefer the state API (aether.state.patch) and service registry (aether.services.invoke) for state mutations where supported. Use host methods for operations not yet covered by those APIs.

runtime.execute is useful for extensions that need to run shell commands as part of their logic without involving the main agent loop.