---@meta

-- Generated from native/src/runtime/runtime.cpp. Do not edit.

-- Runtime layout:
--   /.lua/apps/<AppId>/main.lua            application entry point
--   /.lua/apps/<AppId>/<Subapp>/main.lua   nested route, omitted from the launcher
--   /.lua/data/<AppId>/                    persistent app data, preserved across updates
--   /.lua/lib/<module>.lua                 shared require() modules
--   require() also searches the running application's directory
--
-- The firmware does not clear the frame before calling draw(), and commits changed
-- display content after each callback batch using the panel's own refresh policy.
-- Timer callbacks are registered directly with timer.after/every.

---Required. Runs once before the first draw; failing here stops the app.
---@param arg? string The string passed to sys.launch or sys.replace.
function init(arg) end

---Optional frame loop, called once after init and then at most 30 FPS, best effort.
---@param deltaMs integer Monotonic milliseconds since the previous draw; zero on the first.
function draw(deltaMs) end