cinderRuntime

require("@me::hazard.cinderRuntime")

Where a component parks the state that has to outlive its own hot reload.

A reloaded component gets fresh locals. The unsubscribe closures it took from cinder.on in its previous incarnation are gone, while the handlers themselves are still on the bus — so every reload leaves another live copy of the same handler behind, and one event fires it several times. Modules survive component reloads, so this one holds the unsubscribes across that boundary.

local runtime = require("@me::hazard.cinderRuntime")
local SUBS = "MyComponent"

function awake()
    runtime.claim(SUBS)                               -- drop the last incarnation's
    runtime.keep(SUBS, cinder.on("run.start", start)) -- park this one's
end

function onDestroy()
    runtime.release(SUBS)
end

Each key is independent, so claiming one slot never touches another component's — or another slice's — subscriptions. runtime.count(key) reports how many are parked, which is the quickest way to see whether a reload doubled something.

Deliberately tiny and stable. Editing this file is what reloads it, which is the one thing that would defeat it.