diff --git a/profile/README.md b/profile/README.md
index c51c6dd..6486d78 100644
--- a/profile/README.md
+++ b/profile/README.md
@@ -15,6 +15,7 @@ The full bundle will be usable on the main Signet test network with the upcoming
 
 ### Tooling
 
+- **Playground** — get up and running with the bundle in one command (clone and run, or hand the repo to your AI agent, which installs Nix only if needed): [templatehash-playground](https://github.com/mvuk/templatehash-playground).
 - BIP 448 integration in Miniscript / descriptors: [specifications][extension-tooling], Bitcoin Core implementation ([WIP](https://github.com/bitcoin-inquisition/bitcoin/pull/108)).
 - BIP 448 integration in PSBTs: [specifications][extension-tooling], Bitcoin Core implementation ([WIP](https://github.com/bitcoin-inquisition/bitcoin/pull/108)).
 - Various Rust-Bitcoin tooling: rust-bitcoin integration ([master](https://github.com/bip448/rust-bitcoin/pull/1), [0.32.x](https://github.com/bip448/rust-bitcoin/pull/2)), *TODO: more*.