AI-Engines

Engines that talk to models, one directory per project. Nothing here runs on its own: each engine is a library that a host application consumes.

Directory	What it is
rumo/	The assistant for the Rumo video editor — providers, models, streaming, the conversation, its chat UI, and the generative media services

The repository is a container rather than a single Gradle build, because the engines belong to different projects and share no code. A second engine will be a second directory, not a second branch.

rumo/

The Rumo assistant, com.kerneldroid.aiengines.rumi.

It is a plain Gradle library module. The host application consumes it by including it as a project whose sources live here:

// in Rumo's settings.gradle.kts
include(":ai-engines")
project(":ai-engines").projectDir = file("ai-engines/rumo")

ai-engines/ is this repository, mounted as a git submodule, so rumo/ is ai-engines/rumo from the host's point of view. Editing the engine means editing this repository; the host picks the change up on its next checkout.

What it needs from its host

One interface, com.kerneldroid.aiengines.RumiHost:

val context: Context
fun activeToolSpecs(): List<RumiToolSpec>
suspend fun callTool(name: String, argumentsJson: String, callId: String = ""): RumiToolOutcome
fun navigate(action: String, panel: String?): String
fun mediaAccessGranted(): Boolean
fun requestMediaAccess(): String

That is the whole contract, and it is deliberately this small. The engine owns the conversation, the providers, the wire protocols, the streaming, the models catalogue, the generative services and its own UI; it does not own the editor. The capabilities the model may use are supplied by the host as tools — RumiToolSpec describes one to the model, RumiToolOutcome carries what it produced — so the engine never learns what an editor is, and the host decides what the model can touch.

Two things are worth knowing before changing it:

• The engine owns its strings. All of its text lives in src/main/res/values*/strings_rumi.xml, in four locale folders (English, Russian, Simplified Chinese, Traditional Chinese). It does not reach into the host's resources, and adding a string here does not touch the host.
• It has its own spacing scale and section header, rather than importing the host's design system, for the same reason a library should not import its host's private constants. That duplication is deliberate.

Version catalog

gradle/libs.versions.toml here is a copy of the aliases this module needs. When the module is built as part of the host, Gradle uses the host's catalog and this file is ignored; it exists so this repository can also be opened and built on its own. Keep the versions in step with the host's, and expect nothing to fail loudly if you do not — the host's build is unaffected either way.

Licence

GPL-3.0-or-later. The code came from Rumo's app/ module, which is licensed the same way; or-later rather than only so the terms can move to a later GPL version without asking every contributor who ever touched the tree.

Copyright (C) 2026 Kerneldroid.