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diffuse-facet

Name: Diffuse Facet
Author: icidasset

// Create an interface or feature facet for Diffuse

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updated:22 mai 2026 à 20:32

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package.json

"author": "icidasset"

"repository": "icidasset/diffuse"

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Développeurs de logicielsProfessions informatiques et mathématiques15-1252L4

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name	diffuse-facet
description	Create an interface or feature facet for Diffuse
user-invocable	true
version	0.2.0

Create a Diffuse facet and produce the HTML ready to paste into the create/ page.

Step 1 — Read the docs

Use the read tool to read these files:

docs/architecture.txt — system overview, facet rules, foundation API
docs/elements.txt — all available custom elements with code examples
docs/foundation.js — the foundation code mentioned throughout this document
example/index.html — a representative interface facet to use as a reference
Any specific definition you need (e.g. docs/definitions/output/track.json for the track schema)
docs/definitions/index.ts — TypeScript types for all data structures

Step 2 — Clarify intent

If the user hasn't described what the facet should do, ask one plain-language question before proceeding.

Step 3 — Write the facet

Facets are HTML fragments (no <!doctype>, <html>, or <head>). The loader injects them into <div id="container"> and sets a <base> pointing at the Diffuse build root, so all relative URLs resolve from there. The import map exposes ~/ as the root alias.

Mandatory rules

foundation.ready() must be called on every interface facet — it removes the loading spinner. Omitting it leaves the screen stuck on loading.
foundation.setup({ title }) should be called to set the document title.
Always check the definitions fetched in Step 1 for the exact shape of any data you access — never assume top-level fields exist. For example, track metadata lives under track.tags.*, not at the top level.
Signal reader functions (queue.now, queue.past, queue.future, …) must be called inside effect() to be reactive.
Do not import modules with top-level await from Worker scripts — it causes RPC messages to be dropped.
Use @param annotations above functions, not inline @type in parameter lists.

Skeleton

<style>
  @import "./styles/base.css";
  @import "./styles/diffuse/facet.css";
  @import "./vendor/@phosphor-icons/web/fill/style.css"; /* or /bold/ */

  @layer base, diffuse;

  /* facet-specific styles */
</style>

<main>
  <!-- markup -->
</main>

<script type="module">
  import foundation from "~/common/foundation.js";
  import { effect } from "~/common/signal.js";

  foundation.setup({ title: "My Facet | Diffuse" });

  // wire up elements …

  foundation.ready();
</script>

Standard two-column layout

<main>
  <div class="facet__left">
    <a href="./dashboard/" class="diffuse-logo-container">
      <svg viewBox="0 0 902 134" width="160">
        <title>Diffuse</title>
        <use href="images/diffuse-current.svg#diffuse"></use>
      </svg>
    </a>
    <h1>Title</h1>
    <p>Description.</p>
  </div>
  <div class="facet__right">
    <!-- main content -->
  </div>
</main>

For a centered or full-screen layout (player, dialog, etc.) override body and main in the facet's <style> block directly.

Example foundation usage

await foundation.orchestrator.queueAudio();
await foundation.orchestrator.mediaSession();

const [audio, ctl, queue] = await Promise.all([
  foundation.engine.audio(),
  foundation.orchestrator.controller(),
  foundation.engine.queue(),
]);

await customElements.whenDefined(ctl.localName);

Reactivity

Signals are used for reactivity, see the ~/common/signal.js javascript file for the code. It's based on the alien-signals library.

effect(() => {
  const track = ctl.currentTrack(); // computed — call like a fn
  const isPlaying = ctl.isPlaying();
  const audioState = ctl.audio(); // AudioStateReadOnly | undefined

  if (audioState) {
    const progress = audioState.progress(); // 0–1
    const current = audioState.currentTime();
    const duration = audioState.duration();
  }

  const now = queue.now(); // SignalReader — call like a fn
  const past = queue.past();
  const future = queue.future();
});

Audio control

audio.play({ audioId: queue.now().id });
audio.pause({ audioId: queue.now().id });
audio.seek({ audioId: queue.now().id, percentage: 0.5 }); // 0–1
queue.shift(); // next track
queue.unshift(); // previous track

Additional requirements and notes

When working with track lists, realise that there could be a huge number of tracks that you need to work with (eg. 20000 tracks). Implement a custom virtual scroll (see the winamp or blur browser elements for examples).
Prefer the lit-html library as the templating/rendering engine. It is available from ~/vendor/lit-html/index.js (among some other libraries such as: idb-keyval, throttle-debounce, several @atcute libraries, and kmenu-core). Always make sure to use the ~/vendor/ prefix for libraries, you're not working in an enviroment that bundles code.
Prefer to fetch the tracks from the scoped-tracks orchestrator element.
Always prefer to use an orchestrator or another component instead of reimplementing logic yourself.
Be mindful of performance.

Step 4 — Deliver

Output the complete facet HTML in a code block. Tell the user to open the create/ page in Diffuse, paste it in, and load it.

name	diffuse-facet
description	Create an interface or feature facet for Diffuse
user-invocable	true
version	0.2.0