diff --git a/README.md b/README.md
index a9187c2..0d9e3ab 100644
--- a/README.md
+++ b/README.md
@@ -279,3 +279,12 @@ Apache 2.0 text as published by the Apache Software Foundation. Nothing about th
 were offered under changed: the headers governed then and govern now. It is recorded here rather
 than corrected silently, because a licence is the one thing in a repository that a reader has to be
 able to trust without checking.
+
+## See also (2026-09-02)
+
+- [`DEVNET.md`](DEVNET.md): AERE on your machine in one `docker run`, the validators' own binary as a local chain.
+- Public testnet 28001: `https://testnet-rpc.aere.network`, faucet on `https://aere.network/testnet.html`, an x402 v2
+  facilitator at `https://testnet-rpc.aere.network/x402/` settling a test dollar with EIP-3009 (probed every 6 hours,
+  result at `https://testnet-rpc.aere.network/sarcina/x402-proba.json`).
+- [`SPEC.md`](SPEC.md) section 2.6: the four post-quantum consensus message layers (emitted on mainnet, enforced on
+  the testnet).