Distribution

File	Use
`aegis.js`	readable source — read it, let an assistant modify it, debug with it
`aegis.min.js` (+ `.map`)	everything with dev warnings — 108 KB gzip (91 KB as a production build, see below)
`aegis.core.js` / `aegis.core.min.js`	signals + scope only — 11 KB gzip minified

With a bundler: pay for what you import#

The source is one side-effect-free ES module ("sideEffects": false), so esbuild, Rollup and Vite tree-shake it by named import. Heavy parts (cache, forms, offline, router, transitions, the request layer) attach to the light ones through a late-binding registry, so signal or component alone never drag them in. Pass define: { 'globalThis.AEGIS_PROD': 'true' } to your bundler for a production build: every warning text and dev-only detector is folded away. Measured with node build.mjs --subsets (minified, gzip):

You import	dev	production
`signal, computed, effect, batch, createScope`	7.7 KB	4.3 KB
`island, mount, html, list, show, when, hydrate` + events and `bind`	30 KB	21 KB
+ `resource, mutation, api, settled`	48 KB	37 KB
+ `form, wireForm` and rules	64 KB	52 KB
+ `router`	70 KB	59 KB
everything (`aegis.min.js`)	108 KB	91 KB

npm test includes test-shake.mjs, which fails the build if a light subset starts pulling in the cache, the form messages, the request layer or IndexedDB again.

Things a component reaches through ctx (ctx.fetch, ctx.when, ctx.show, ctx.list) and the { transition } option of show()/list() are only in the bundle when the matching export (api, when, show, list, transition) is imported somewhere in the app; otherwise they throw a one-line error telling you what to import. The full file has everything, so zero-build pages never see this.

Without a bundler: build the subset once#

No bundler in the project? Let the repo build the subset for you — it reads the import { … } from 'aegis' line of your app and emits one tree-shaken, production ES module:

node build.mjs --from ../app/assets/js/admin.js --out ../app/assets/js/aegis.js   # only what admin.js imports, no dev texts
node build.mjs --from ../app/assets/js/admin.js --out aegis.dev.js --dev          # same, with warnings for development
node build.mjs --exports signal,effect,html,mount,list --out aegis.custom.js      # or name the exports by hand
node build.mjs --from app.js --list                                                # print what was kept

A 15-export admin bundle comes out at 14 KB gzip. Unknown names fail the build instead of failing in the browser. Otherwise take aegis.min.js (warnings included, they only fire on localhost) or aegis.core.min.js; the full file is the same code, nothing is duplicated between the two. globalThis.AEGIS_PROD = true before the import silences warnings at runtime without a build.

<script type="importmap">{ "imports": { "aegis": "https://aegisjs.com/aegis.min.js" } }</script>

npm run build regenerates the minified files (esbuild, dev dependency only — users never build).