Activity feed

Copy this

<div class="hm-measure-lg">
  <ul class="activity-feed">
    <li class="activity-row" data-activity-row>
      <span class="activity-dot"><svg fill="currentColor" viewBox="0 0 20 20" aria-hidden="true"><circle cx="10" cy="10" r="6"/></svg></span>
      <div class="activity-row-inner">
        <div class="activity-time">09:41</div>
        <div class="activity-bubble"><span class="activity-actor">Ada</span> approved the refund.</div>
      </div>
    </li>
    <li class="activity-row" data-activity-row>
      <span class="activity-dot"><svg fill="currentColor" viewBox="0 0 20 20" aria-hidden="true"><circle cx="10" cy="10" r="6"/></svg></span>
      <div class="activity-row-inner">
        <div class="activity-time">09:12</div>
        <div class="activity-bubble"><span class="activity-actor">System</span> flagged the account for review.</div>
      </div>
    </li>
  </ul>
</div>

Server exchange

This Hyperpart has no server exchange — it is presentation or client chrome only. htmx does not issue a request on this part's behalf. If you put an affordance (hx-*) on a control that uses this markup, that action's exchange belongs to the action, not this part. See Swap contract for host-owned envelopes.

Swap contract

Agent-visible HTMX topology (ADR-0054 / decision 0012). exchange envelope = what the response may re-emit relative to the persistent slot (body_only | outer | none | host_owned | document). dual-lock validates part markup only — not this envelope. Stem: stems/morph-safe-hypermedia.md; decision: docs/decisions/0012-swap-identity-contract.md.

No host HTMX exchange on this part — presentation or client chrome only. exchange envelope: n/a.

If a host wraps this markup in hx-*, that host owns the swap contract (sole identity + envelope). Prefer innerMorph / outerMorph for stable slots; replacement for flash; body-only responses under inner swaps.

Envelope response examples

This part has no owned exchange (envelope n/a). If a host adds hx-*, that host’s envelope applies — typically body_only:

<!-- Host wraps this presentation part with hx-* (host owns envelope) -->
<!-- Prefer: hx-swap="innerMorph" hx-target="#panel-body" -->
<!-- Server returns body_only interior for #panel-body -->
<div class="dz-stack">content…</div>

Do not re-own the slot:

<!-- WRONG: server returns the presentation root with a new id every poll -->
<div id="activity-feed-root" data-dz-region>…</div>

How to use it

No extended guidance authored yet — start from Copy this and the dependency chips (Primitive = markup only; controller = load listed JS; Endpoint = implement Server exchange).

Seams

• copy the partial under Copy this; keep root class and data-* modifiers so the CSS/JS bundle matches
• no Server exchange on this part — pure presentation or client chrome
• satisfy the DOM contract tables (CI stop-ship)

DOM contract

What the emitted HTML must satisfy — the table is the required surface; Python under contracts/ is the package-internal dual-lock CI runs (tests/test_contracts.py), not an app route. Standalone HTMX4: implement the API so responses match this markup. Dazzle: the agent emits SSR that already satisfies it. Do not invent attrs outside these tables. For request/response wiring see Server exchange.

contracts/activity_feed.py

Required in the DOM: root [data-activity-row] (part activity-feed). Emit only these attributes — inventing extras is fine only if controllers ignore them; omitting required ones fails CI (tests/test_contracts.py).

Ingestion model ActivityRow

Server-side shape before render — one normalisation boundary for producers.

Exemplar render()

Executable in CI: the Python below is render(); the boxed preview is render(EXEMPLARS[0]) — the first fixture the dual-lock tests emit, not a separate widget and not gallery mock data.

def render(row: ActivityRow) -> str:
    """Model → one ``<li>`` activity row."""
    time_s = html.escape(row.time_str)
    actor_html = ""
    trusted = (row.actor_html or "").strip()
    if trusted:
        actor_html = f'<span class="dz-activity-actor">{trusted}</span> '
    elif row.actor:
        actor_html = f'<span class="dz-activity-actor">{html.escape(row.actor)}</span> '
    desc = html.escape(row.description)
    if row.drill_url:
        href = html.escape(row.drill_url, quote=True)
        # Empty drill_url stays byte-stable plain text (no anchor).
        desc_html = f'<a href="{href}" data-dz-activity-drill>{desc}</a>'
    else:
        desc_html = desc
    # Trailing space after bubble open class mirrors Dazzle emitter legacy.
    return (
        f'<li class="dz-activity-row" data-dz-activity-row>'
        f'<span class="dz-activity-dot">{_DOT_SVG}</span>'
        f'<div class="dz-activity-row-inner">'
        f'<div class="dz-activity-time">{time_s}</div>'
        f'<div class="dz-activity-bubble" >'
        f"{actor_html}{desc_html}"
        f"</div>"
        f"</div>"
        f"</li>"
    )

Notes

Source files

Canonical registration in the registry. No dedicated controller — CSS for this part lives in the layered bundle.

site/registry.py · contracts/activity_feed.py