feat(adventure): add levels to The Accessibility Nightmare: intermediate

[offon-data-refresh]

update: The Accessibility Nightmare

Auto-synced from the challenges repo.

Source: https://github.com/off-on-dev/open-source-challenges/tree/main/adventures/accessibility-nightmare

Levels in this PR: intermediate

---

Before merging

• Review topics: on each level, auto-set to all adventure tags, refine to level-specific subset if needed
• Update discussion_url: in each level once the Discourse threads are created
• Update discussionUrl in each *-posts.json stub

Manual steps (only if needed)

• If a level's architecture_diagram SVG was not auto-fetched (check the sync logs for a warning), add the SVG manually to src/assets/diagrams/ and add architecture_diagram: <file>.svg to that level in adventure.yaml - [ ] If a level has an architecture_diagram but no diagram_alt, add diagram_alt: to that level in adventure.yaml with a one-sentence description of the diagram - [ ] Run node scripts/refresh-discussions.mjs after discussionUrl values are set

Routes & sitemap

Routes are generated from adventure.yaml by the Astro content collection
at build time (getStaticPaths) — there is nothing to regenerate or commit.
The leaderboard registry derives from adventure.yaml at runtime via buildAdventureCategories() in refresh-leaderboard.mjs -- nothing to hand-maintain.

Checks

npm run sync && npm run build && npm run test:e2e

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2026-09-15 07:01 UTC