publicity: HF Space discoverability — trending optimization (banner, weekly metadata bumps, descriptive thumbnail)

[reacher-z]

Problem

The HF Space TIGER-Lab/ClawBench is RUNNING but it's not on the HF Space trending row. Trending Spaces get exponentially more eyeballs than non-trending ones, and trending placement is driven by:

1. Recent activity (commits, README updates, dataset pushes)
2. Recent upvotes
3. A distinctive thumbnail / banner
4. Frequent metadata refreshes

Today we update the Space rarely — leaderboard CSV changes don't trigger HF's trending signal.

Proposal

• Banner image — upload a 1280×640 banner to the Space (same content as our new social-card.png), referenced via thumbnail: in the README YAML
• Weekly heartbeat commit — a CI job that bumps a last_refresh: <date> field in space/README.md every Monday (even if no functional change). This counts toward trending recency.
• Descriptive models: + datasets: YAML in README so HF's relatedness graph surfaces us
• Pin Space activity to repo Releases — when GitHub Releases ships, mirror as a Space commit

Acceptance

• Space README has thumbnail:, models:, datasets: YAML fields populated
• CI/cron pushes a weekly heartbeat commit
• Space shows on HF's trending row at least once after these changes land

Why now

We earned a #3 Daily Paper spot once. Trending Space is the long-tail equivalent — visible distribution channel that compounds over months, not days.