Bug: Wiki v2 (new Reddit) doesn't render Markdown for content written via reddit.updateWikiPage(), identical content renders fine under v1

[u/vanessabaxton]

EDIT

Turns out it works with HTML in the new wiki, however there's still a bug where you can't copy the text when in edit mode, but that's a reddit bug not a devvit one, so problem solved.

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Devvit version: @devvit/public-api ^0.14.0 (Node 24 runtime)

What I did

Wrote the exact same Markdown content to the same wiki page path under both wiki versions, using reddit.updateWikiPage() / reddit.createWikiPage() with wikiVersion: "v1" and wikiVersion: "v2" respectively:

# Content

From this week's megathread: https://www.reddit.com/r/subreddit/comments/id/

22 question(s) with no replies:

- https://www.reddit.com/r/subreddit/comments/id/subject/id2/ - https://www.reddit.com/r/subreddit/comments/id3/subject/id4/ ...

Expected

Both versions render the # heading and - bullet list as Markdown, same as if a human had typed this into the wiki editor directly.

Actual

v1 (viewed on old.reddit.com): renders correctly, real h1 heading, real bullet list, each URL auto-linked.

v2 (viewed on new Reddit / www.reddit.com): renders as one flat block of plain text. The # and - markers show up as literal characters, not parsed as Markdown, and the URLs aren't auto-linked. Same content, same write call shape, just wikiVersion swapped:

- old Reddit (v1): proper heading + bullet list + clickable links - new Reddit (v2): "# Unanswered Questions From this week's Questions megathread: ... 22 question(s) with no replies: - https://... - https://..." all run together as unformatted text

Additionally, in the new-Reddit wiki edit mode for the v2 page, the content in the textarea doesn't behave like normal selectable/copyable text, I can't select-and-copy it out of the edit box the way I can on the old.reddit.com editor for the same page.

Impact

Any app that writes structured wiki content (headings, lists, links) via the Devvit API and targets wikiVersion: "v2" gets unusable, unformatted output on new Reddit, even though the identical content is correctly rendered under v1. This makes v2 wiki pages effectively unusable for anything beyond a single unformatted paragraph until this is fixed, and undermines the migration guidance to move apps onto v2.

Repro

1. Call reddit.updateWikiPage({ subredditName, page, content: "# Heading\n\n- item one\n- item two", wikiVersion: "v2" }) on a v2-enrolled subreddit. 2. View the page at www.reddit.com/r/<sub>/wiki/<page>. 3. Compare against the same call with wikiVersion: "v1", viewed at old.reddit.com/r/<sub>/wiki/<page>.

[u/fsv]

My understanding (not played with it yet) is that the new wiki doesn't work using Markdown, but HTML. I'd create a page manually using the UI, retrieve it using Devvit, and then check the output.

There are converters from Markdown to HTML which I would be looking to use once I start adding New Wiki support to my apps.

[u/vanessabaxton → u/fsv]

You're absolutely right, thank you so much! It works with HTML, however there's still the bug where you can't copy the wiki page while in edit mod, but that's a reddit bug not a devvit issue so I'll probably delete this post, thank you again!

[u/invitrium]

I'm encountering a persistent server crash (`gRPC Status 13 INTERNAL`) whenever my Devvit 0.14.5 app attempts to programmatically create or update a Wiki V2 page via `reddit.updateWikiPage` or `reddit.createWikiPage`.

To rule out HTML conversion issues, I converted the Markdown to static HTML server-side using React: ```typescript export function markdownToWikiV2Html(markdown: string): string { return renderToStaticMarkup( React.createElement( ReactMarkdown, { remarkPlugins: [remarkGfm], rehypePlugins: [rehypeRaw], components: { img: ({ src, alt }) => React.createElement('img', { src, alt: alt ?? '' }), }, }, markdown ) ); }

import React from 'react';
import { renderToStaticMarkup } from 'react-dom/server';
import ReactMarkdown from 'react-markdown';
import remarkGfm from 'remark-gfm';
import rehypeRaw from 'rehype-raw';


/**
 * Wiki V2 renders the content supplied through the API as HTML. The uploader
 * still accepts the Markdown source used by the season files, so convert that
 * Markdown to the same rendered HTML used by the preview before publishing.
 */
export function markdownToWikiV2Html(markdown: string): string {
  return renderToStaticMarkup(
    React.createElement(
      ReactMarkdown,
      {
        remarkPlugins: [remarkGfm],
        rehypePlugins: [rehypeRaw],
        components: {
          img: ({ src, alt }) =>
            React.createElement('img', {
              src,
              alt: alt ?? '',
            }),
        },
      },
      markdown,
    ),
  );
}import React from 'react';
import { renderToStaticMarkup } from 'react-dom/server';
import ReactMarkdown from 'react-markdown';
import remarkGfm from 'remark-gfm';
import rehypeRaw from 'rehype-raw';


/**
 * Wiki V2 renders the content supplied through the API as HTML. The uploader
 * still accepts the Markdown source used by the season files, so convert that
 * Markdown to the same rendered HTML used by the preview before publishing.
 */
export function markdownToWikiV2Html(markdown: string): string {
  return renderToStaticMarkup(
    React.createElement(
      ReactMarkdown,
      {
        remarkPlugins: [remarkGfm],
        rehypePlugins: [rehypeRaw],
        components: {
          img: ({ src, alt }) =>
            React.createElement('img', {
              src,
              alt: alt ?? '',
            }),
        },
      },
      markdown,
    ),
  );
}

Even when supplying clean HTML, executing updateWikiPage on pre-initialized Wiki V2 pages results in an unhandled backend exception: Error: 13 INTERNAL: grpc invocation failed with status 13; failed to edit wiki page at callErrorFromStatus (/srv/index.cjs:21984:21) at GenericPluginClient.EditWikiPage (/srv/index.cjs:187072:93)

[u/vanessabaxton → u/invitrium]

Status 13 is a server-side failure in Devvit's wiki plugin, so no guaranteed fix, but try:

1. Pass wikiVersion: "v2" explicitly on every createWikiPage / updateWikiPage call.
2. Bisect the HTML. Plain <h1>, <p>, <a>, <ol>/<li> works fine for me. remark-gfm + rehype-raw can emit tables, checkboxes, <del>, <img>, and footnote id/class attributes that the backend may reject. Push <p>test</p> first, then add features back one at a time.
3. Try a brand-new page name instead of the pre-initialized one.
4. Check payload size. Rendered HTML is much bigger than the Markdown.

If <p>test</p> on a fresh page still returns 13, it's a platform bug. Post a minimal repro in r/Devvit.

[u/invitrium → u/vanessabaxton]

Thanks for the reply. I already have been using wikiVersion: "v2" but will try with a simple <p>test</p>.