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## Summary This PR adds a [Workers KV](https://developers.cloudflare.com/workers/runtime-apis/kv/)-based database to the playground, which enables us to associate shared snippets with a stable ID, which in turn allows us to generate short URLs, rather than our existing extremely-long URLs. For now, the URLs are based on UUID, so they look like https://play.ruff.rs/a1c40d58-f643-4a3e-bc23-15021e16acef. (This URL isn't expected to work, as the playground isn't deployed; it's only included as an example.) There are no visible changes in the UI here -- you still click the "Share" button, which copies the link to your URL. There's no user-visible latency either -- KV is very fast. For context, with Workers KV, we provision a Workers KV store in our Cloudflare account (`wrangler kv:namespace create "PLAYGROUND"`), and then create a Cloudflare Worker that's bound to the KV store via the `wrangler.toml`: ```toml name = "db" main = "src/index.ts" compatibility_date = "2023-08-07" kv_namespaces = [ { binding = "PLAYGROUND", id = "672e16c4fb5e4887845973bf0e9f6021", preview_id = "0a96477e116540e5a6e1eab6d6e7523e" } ] ``` The KV store exists in perpetuity, while the Worker can be updated, deployed, removed, etc. independently of the KV store. The Worker itself has unfettered access to the KV store. The Worker is exposed publicly, and just does some basic verification against the request host.
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# See: https://developers.cloudflare.com/workers/wrangler/configuration/#environmental-variables
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