What causes "Tag not found" in DIYgod/RSSHub?

Verify the slug at https://www.8kcosplay.com/wp-json/wp/v2/tags?slug= .

DIYgod/RSSHub · error · Error

Tag not found

Error message

Tag not found

What it means

8kcosplay tag lookup queries /wp-json/wp/v2/tags?slug=… and throws a plain `Error('Tag not found')` when WP returns no matches. Result is cached under '8kcosplay:tag:<slug>'.

Source

Thrown at lib/routes/8kcos/utils.ts:55

        }
        return {
            id: categoryInfo.id,
            title: categoryInfo.yoast_head_json.title,
            description: categoryInfo.description,
            link: categoryInfo.link,
        };
    });

export const getTagInfo = (tag: string) =>
    cache.tryGet(`8kcosplay:tag:${tag}`, async () => {
        const data = await ofetch('https://www.8kcosplay.com/wp-json/wp/v2/tags', {
            query: {
                slug: tag,
            },
        });
        const tagInfo = data[0];
        if (!tagInfo) {
            throw new Error('Tag not found');
        }
        return {
            id: tagInfo.id,
            title: tagInfo.yoast_head_json.title,
            description: tagInfo.description,
        };
    });

View on GitHub (pinned to bed535e087)

Solutions

Verify the slug at https://www.8kcosplay.com/wp-json/wp/v2/tags?slug=<your-slug>.
Invalidate the cache key '8kcosplay:tag:<slug>'.
Use the exact lowercase, dash-joined slug from the WP term.

Example fix

// before
tag: 'Long Skirt'         // spaces, wrong form
// after
tag: 'long-skirt'

Defensive patterns

Strategy: try-catch

Validate before calling

function looksLikeWpTagSlug(s) {
  return typeof s === 'string' && /^[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$/.test(s);
}

Type guard

function isWpTagSlug(s): s is string {
  return typeof s === 'string' && /^[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$/.test(s);
}

Try / catch

try {
  return await getTagInfo(tag);
} catch (e) {
  if (e instanceof Error && /Tag not found/.test(e.message)) {
    return null;
  }
  throw e;
}

Prevention

Multi-word tags use a dash joiner in WP slugs.
Invalidate '8kcosplay:tag:<slug>' after a correction.
Match on the message text — the error class is plain Error, not InvalidParameterError.

When it happens

Trigger: Calling the 8kcos tag feed with a slug that does not exist on 8kcosplay.com — typo, renamed tag, or using an ID instead of the slug.

Common situations: Tag renamed in WP admin; cache replaying a previous bad lookup; multi-word tag slug misunderstood (WP joins with '-').

Related errors

AI-assisted analysis of DIYgod/RSSHub@bed535e087 (2026-08-12). Data as JSON: /api/errors/9808a89490c668a9. Report an issue: GitHub.