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Generate a manual preview/test harness page for the post-item list components. Use when you want to visually preview PublicationPostItem Small/Medium/Large across the PostsListBlock, StandardSitePostBlock, and reader feed layouts, with toggles for highlight-first-post, card border, cover image, publication footer, and a page-width slider.

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Posts List Test Harness

Scaffolds a client-side preview page that renders the three PublicationPostItem leaf components (Small / Medium / Large) driven by fake data, so every size / highlight / layout variant can be eyeballed without the Replicache / SWR provider stack.

What to produce

Create app/test/posts/page.tsx (a folder called posts under app/test/) with the exact contents in Reference implementation below. The page is a self-contained "use client" component — no routing or data fetching required. Visit it at /test/posts.

If the file already exists, overwrite it so it matches the reference verbatim.

Structure

The page is organized into three sections, each with its own controls row:

  • PostsListBlock — mirrors PublicationPostsList. Page-width slider + "Highlight First Post" toggle (first post renders large, the rest follow view). Shows Medium and Small list variants.
  • StandardSitePostBlock — mirrors StandardSitePostItemView for a single post with the publication footer. Page-width slider + "Card Border Hidden" toggle. Shows Large, Medium, and Small.
  • Reader Post Link — mirrors the reader feed's PostListing card. Page-width slider + "Selected" / "Cover Image" / "Publication Footer" toggles.

Source components

  • app/(app)/lish/[did]/[publication]/PublicationPostItem exports PublicationPostItemSmall, PublicationPostItemMedium, and PublicationPostItemLarge.
  • Icons come from components/Icons/: CommentTiny, TagTiny, ShareTiny, ExternalLinkTiny, RecommendTinyEmpty.

How the mock works

FAKE_POSTS is a small array of FakePost records (title, description, author, date, optional cover image, comment count, tags) that exercises the edge cases — one post with no cover image and no interactions, one with several tags.

The real list components consume <InteractionPreview> and PubIcon, which drag in Replicache and the toast/recommend stack. FakeInteractions and FakeFooter mirror their visual shape with plain markup so nothing needs the provider tree. ReaderPostLink likewise reproduces PostListing's markup directly rather than importing it.

PublicationPostItemLarge uses pageWidth to decide between its wide (side-by-side) and stacked layouts — >= 768 triggers the wide layout — so each section drives it with the page-width slider and renders inside a Variant box sized to that width (capped to the viewport).

Reference implementation

Write app/test/posts/page.tsx with exactly this:

"use client";
import React, { useState } from "react";
import {
  PublicationPostItemSmall,
  PublicationPostItemMedium,
  PublicationPostItemLarge,
} from "app/(app)/lish/[did]/[publication]/PublicationPostItem";
import { CommentTiny } from "components/Icons/CommentTiny";
import { TagTiny } from "components/Icons/TagTiny";
import { ShareTiny } from "components/Icons/ShareTiny";
import { ExternalLinkTiny } from "components/Icons/ExternalLinkTiny";
import { RecommendTinyEmpty } from "components/Icons/RecommendTiny";

// PostsListBlock (-> PublicationPostsList) and StandardSitePostBlock
// (-> StandardSitePostItemView) both render through these same three leaf
// item components. Driving them with fake data here previews every size/
// highlight variant without the Replicache / SWR provider stack.

// >= 768 triggers the wide (side-by-side) "large" layout; below that it stacks.
const DEFAULT_PAGE_WIDTH = 768;

type FakePost = {
  title: string;
  description: string;
  author: string;
  date: string;
  coverImageSrc?: string;
  comments: number;
  tags: string[];
};

const FAKE_POSTS: FakePost[] = [
  {
    title: "The Quiet Architecture of Everyday Tools",
    description:
      "How the most useful software disappears into habit — and why designing for that invisibility is harder than it looks.",
    author: "rose.bsky.social",
    date: "June 12, 2026",
    coverImageSrc: "/imagePlaceholder.png",
    comments: 12,
    tags: ["design", "tools"],
  },
  {
    title: "Notes From a Slow Garden",
    description:
      "A season of letting things grow on their own schedule, and what the weeds taught me about patience.",
    author: "mateo.bsky.social",
    date: "June 9, 2026",
    coverImageSrc: "/imagePlaceholder.png",
    comments: 3,
    tags: ["essays"],
  },
  {
    title: "On Reading Without a Goal",
    description:
      "Reclaiming the wandering, purposeless kind of reading in an age of optimization.",
    author: "june.bsky.social",
    date: "June 2, 2026",
    comments: 0,
    tags: [],
  },
  {
    title: "A Short History of the Footnote",
    description:
      "The humble aside has carried gossip, dissent, and entire arguments. A look at its many lives.",
    author: "ari.bsky.social",
    date: "May 28, 2026",
    coverImageSrc: "/imagePlaceholder.png",
    comments: 7,
    tags: ["history", "writing", "typography"],
  },
];

// A lightweight stand-in for <InteractionPreview> — same visual shape (recommend
// / comment counts + tag count) without pulling in Replicache and the toast/
// recommend stack.
function FakeInteractions(props: { comments: number; tags: string[] }) {
  if (props.comments === 0 && props.tags.length === 0) return null;
  return (
    <div className="flex gap-2 text-tertiary text-sm items-center">
      {props.comments > 0 && (
        <span className="flex flex-row gap-1 items-center">
          <CommentTiny /> {props.comments}
        </span>
      )}
      {props.tags.length > 0 && (
        <span className="flex gap-1 items-center">
          <TagTiny /> {props.tags.length}
        </span>
      )}
    </div>
  );
}

// Mirrors StandardSitePostItemView's PubFooter without PubIcon's data deps.
function FakeFooter() {
  return (
    <div className="flex items-center gap-1.5 text-accent-contrast font-bold text-sm">
      <div className="w-3 h-3 rounded-full rounded-sm bg-accent-1 shrink-0" />
      <span className="min-w-0 truncate">Test Publication</span>
    </div>
  );
}

type ListView = "small" | "medium";

// Reproduces PublicationPostsList's variant mapping: the first post becomes a
// "large" item when highlightFirstPost is on, everything else follows `view`.
function PostsList(props: {
  view: ListView;
  highlightFirstPost: boolean;
  pageWidth: number;
}) {
  return (
    <div className="publicationPostList w-full flex flex-col gap-2">
      {FAKE_POSTS.map((post, index) => {
        const isHighlightedFirst = props.highlightFirstPost && index === 0;
        const variant = isHighlightedFirst
          ? "large"
          : props.view === "small"
            ? "small"
            : "medium";
        const interactions = (
          <FakeInteractions comments={post.comments} tags={post.tags} />
        );

        let item: React.ReactNode;
        if (variant === "large") {
          item = (
            <PublicationPostItemLarge
              inList
              title={post.title}
              description={post.description}
              author={post.author}
              date={post.date}
              interactions={interactions}
              coverImageSrc={post.coverImageSrc}
              coverImageAlt={post.title}
              pageWidth={props.pageWidth}
            />
          );
        } else if (variant === "small") {
          item = (
            <PublicationPostItemSmall
              inList
              title={post.title}
              author={post.author}
              date={post.date}
              interactions={interactions}
            />
          );
        } else {
          item = (
            <PublicationPostItemMedium
              inList
              title={post.title}
              description={post.description}
              author={post.author}
              date={post.date}
              interactions={interactions}
              coverImageSrc={post.coverImageSrc}
              coverImageAlt={post.title}
            />
          );
        }

        return (
          <React.Fragment key={index}>
            {item}
            <hr className="last:hidden border-border-light" />
          </React.Fragment>
        );
      })}
    </div>
  );
}

type PostSize = "large" | "medium" | "small";

// Reproduces StandardSitePostItemView for a single post (with the publication
// footer), wrapped in card chrome that responds to the cardBorderHidden toggle.
function StandardSitePost(props: {
  size: PostSize;
  cardBorderHidden: boolean;
  pageWidth: number;
}) {
  const post = FAKE_POSTS[0];
  const interactions = (
    <FakeInteractions comments={post.comments} tags={post.tags} />
  );
  const pubInfo = <FakeFooter />;

  let item: React.ReactNode;
  if (props.size === "large") {
    item = (
      <PublicationPostItemLarge
        title={post.title}
        description={post.description}
        author={post.author}
        date={post.date}
        interactions={interactions}
        pubInfo={pubInfo}
        coverImageSrc={post.coverImageSrc}
        coverImageAlt={post.title}
        pageWidth={props.pageWidth}
      />
    );
  } else if (props.size === "small") {
    item = (
      <PublicationPostItemSmall
        title={post.title}
        author={post.author}
        date={post.date}
        interactions={interactions}
        pubInfo={pubInfo}
      />
    );
  } else {
    item = (
      <PublicationPostItemMedium
        title={post.title}
        description={post.description}
        author={post.author}
        date={post.date}
        interactions={interactions}
        pubInfo={pubInfo}
        coverImageSrc={post.coverImageSrc}
        coverImageAlt={post.title}
      />
    );
  }

  return (
    <div
      className={
        props.cardBorderHidden
          ? "bg-transparent"
          : "bg-bg-page border border-border-light rounded-lg"
      }
    >
      {item}
    </div>
  );
}

// Reproduces the reader feed's <PostListing> card: cover image on top, then
// title / description, a publication footer, and a byline + interactions row.
// The real component drags in theme providers, toasts, and the recommend/
// replicache stack, so this mirrors its markup with fake data.
function ReaderPostLink(props: {
  selected: boolean;
  coverImage: boolean;
  publicationFooter: boolean;
}) {
  const post = FAKE_POSTS[0];
  return (
    <div className="postListing flex flex-col gap-1">
      <div
        className={`relative flex flex-col overflow-hidden rounded-lg w-full border bg-bg-page ${
          props.selected
            ? "outline-2 outline-offset-1 outline-accent-contrast border-accent-contrast"
            : "hover:outline-accent-contrast hover:border-accent-contrast border-border-light"
        }`}
      >
        {props.coverImage && (
          <div className="postListingImage">
            <img
              src={post.coverImageSrc}
              alt={post.title}
              className="w-full h-auto aspect-video object-cover object-top-left rounded"
            />
          </div>
        )}
        <div className="postListingInfo px-3 py-2">
          <h3 className="postListingTitle text-primary line-clamp-2 sm:text-lg text-base pb-0.5">
            {post.title}
          </h3>
          <p className="postListingDescription text-secondary line-clamp-3 leading-snug sm:text-base text-sm">
            {post.description}
          </p>
          <div className="flex flex-col-reverse gap-2 text-sm text-tertiary items-center justify-start pt-1.5 w-full">
            {props.publicationFooter && (
              <div className="flex flex-col shrink-0 w-full">
                <hr className="block border-border-light mb-1" />
                <div className="flex justify-between gap-4 w-full">
                  <span className="text-accent-contrast font-bold text-sm flex gap-[6px] items-center grow w-max shrink-0 min-w-0">
                    <span className="w-4 h-4 rounded-sm bg-accent-1 shrink-0" />
                    <span className="w-max min-w-0">Test Publication</span>
                  </span>
                  <span className="text-sm flex flex-row items-center text-tertiary gap-1 min-w-0">
                    <span className="truncate min-w-0">
                      example.leaflet.pub
                    </span>
                    <ExternalLinkTiny className="shrink-0" />
                  </span>
                </div>
              </div>
            )}
            <div className="flex flex-row justify-between gap-2 text-xs items-center w-full">
              <div className="flex flex-row flex-wrap items-center gap-1 text-tertiary min-w-0">
                <span>{post.author}</span>
                <span>·</span>
                <span className="shrink-0 sm:text-sm text-xs">{post.date}</span>
              </div>
              {post.tags.length > 0 && (
                <span className="flex gap-1 items-center">
                  <TagTiny /> {post.tags.length}
                </span>
              )}
            </div>
          </div>
        </div>
      </div>
      <div className="text-sm flex justify-between text-tertiary">
        <div className="postListingsInteractions flex gap-3 px-1 items-center">
          <span className="flex gap-1 items-center">
            <RecommendTinyEmpty /> 4
          </span>
          {post.comments > 0 && (
            <span className="flex flex-row gap-1 items-center">
              <CommentTiny /> {post.comments}
            </span>
          )}
        </div>
        <span className="flex gap-1 items-center font-bold">
          Share <ShareTiny />
        </span>
      </div>
    </div>
  );
}

function Toggle(props: {
  label: string;
  checked: boolean;
  onChange: (v: boolean) => void;
}) {
  return (
    <label className="flex items-center gap-1.5 text-sm text-secondary select-none">
      <input
        type="checkbox"
        checked={props.checked}
        onChange={(e) => props.onChange(e.target.checked)}
      />
      {props.label}
    </label>
  );
}

function PageWidthSlider(props: {
  value: number;
  onChange: (v: number) => void;
}) {
  return (
    <label className="flex items-center gap-2 text-sm text-secondary select-none">
      page width
      <input
        type="range"
        min={320}
        max={1024}
        step={8}
        value={props.value}
        onChange={(e) => props.onChange(Number(e.target.value))}
      />
      <span className="tabular-nums text-tertiary w-12">{props.value}px</span>
    </label>
  );
}

function Variant(props: {
  label: string;
  pageWidth: number;
  children: React.ReactNode;
}) {
  return (
    <div className="flex flex-col gap-2">
      <h3 className="text-tertiary uppercase text-xs font-bold tracking-wide">
        {props.label}
      </h3>
      {/* The box renders at the chosen page width so the layout reflects how
          the block actually looks at that width (capped to the viewport). */}
      <div
        className="border border-border rounded-md p-4"
        style={{ width: props.pageWidth, maxWidth: "100%" }}
      >
        {props.children}
      </div>
    </div>
  );
}

export default function PostsPreviewPage() {
  let [highlightFirstPost, setHighlightFirstPost] = useState(false);
  let [cardBorderHidden, setCardBorderHidden] = useState(false);
  let [postsListPageWidth, setPostsListPageWidth] =
    useState(DEFAULT_PAGE_WIDTH);
  let [standardSitePageWidth, setStandardSitePageWidth] =
    useState(DEFAULT_PAGE_WIDTH);
  let [readerSelected, setReaderSelected] = useState(false);
  let [readerCoverImage, setReaderCoverImage] = useState(true);
  let [readerPublicationFooter, setReaderPublicationFooter] = useState(true);
  let [readerPageWidth, setReaderPageWidth] = useState(360);

  return (
    <div className="max-w-[1024px] mx-auto flex flex-col gap-12 p-6">
      <h1>Posts List & Standard Site Post Variants</h1>

      <section className="flex flex-col gap-4">
        <div className="flex items-center gap-4 flex-wrap border-b border-border-light pb-2">
          <h2 className="grow">PostsListBlock</h2>
          <PageWidthSlider
            value={postsListPageWidth}
            onChange={setPostsListPageWidth}
          />
          <Toggle
            label="Highlight First Post"
            checked={highlightFirstPost}
            onChange={setHighlightFirstPost}
          />
        </div>
        <Variant label="Medium" pageWidth={postsListPageWidth}>
          <PostsList
            view="medium"
            highlightFirstPost={highlightFirstPost}
            pageWidth={postsListPageWidth}
          />
        </Variant>
        <Variant label="Small" pageWidth={postsListPageWidth}>
          <PostsList
            view="small"
            highlightFirstPost={highlightFirstPost}
            pageWidth={postsListPageWidth}
          />
        </Variant>
      </section>

      <section className="flex flex-col gap-4">
        <div className="flex items-center gap-4 flex-wrap border-b border-border-light pb-2">
          <h2 className="grow">StandardSitePostBlock</h2>
          <PageWidthSlider
            value={standardSitePageWidth}
            onChange={setStandardSitePageWidth}
          />
          <Toggle
            label="Card Border Hidden"
            checked={cardBorderHidden}
            onChange={setCardBorderHidden}
          />
        </div>
        <Variant label="Large" pageWidth={standardSitePageWidth}>
          <StandardSitePost
            size="large"
            cardBorderHidden={cardBorderHidden}
            pageWidth={standardSitePageWidth}
          />
        </Variant>
        <Variant label="Medium" pageWidth={standardSitePageWidth}>
          <StandardSitePost
            size="medium"
            cardBorderHidden={cardBorderHidden}
            pageWidth={standardSitePageWidth}
          />
        </Variant>
        <Variant label="Small" pageWidth={standardSitePageWidth}>
          <StandardSitePost
            size="small"
            cardBorderHidden={cardBorderHidden}
            pageWidth={standardSitePageWidth}
          />
        </Variant>
      </section>

      <section className="flex flex-col gap-4">
        <div className="flex items-center gap-4 flex-wrap border-b border-border-light pb-2">
          <h2 className="grow">Reader Post Link</h2>
          <PageWidthSlider
            value={readerPageWidth}
            onChange={setReaderPageWidth}
          />
          <Toggle
            label="Selected"
            checked={readerSelected}
            onChange={setReaderSelected}
          />
          <Toggle
            label="Cover Image"
            checked={readerCoverImage}
            onChange={setReaderCoverImage}
          />
          <Toggle
            label="Publication Footer"
            checked={readerPublicationFooter}
            onChange={setReaderPublicationFooter}
          />
        </div>
        <Variant label="Post Listing" pageWidth={readerPageWidth}>
          <ReaderPostLink
            selected={readerSelected}
            coverImage={readerCoverImage}
            publicationFooter={readerPublicationFooter}
          />
        </Variant>
      </section>
    </div>
  );
}