update proxy discovery

RIP-02.md

@@ -1,23 +1,64 @@
 # RIP-02: Node Listing
 
-- [ ] Create PR to the Nostr repo to add a new Kind 40500 event
+Nodes announce their presence and capabilities via Nostr events for client discovery, following NIP-91.
 
-Nodes announce their presence and capabilities via a Nostr event for client discovery.
+## Provider Information Event
 
-**Kind**: 40500
+**Kind**: 38421
 
 ```json
 {
-  "kind": 40500,
+  "kind": 38421,
+  "pubkey": "<routstr-provider-pubkey>",
   "created_at": <unix-timestamp>,
+  "content": "<optional-kind:0-style-metadata>",
   "tags": [
-    ["d", "<node-id>"],       // Unique node identifier
-    ["p", "<operator-pubkey>"],
-    ["url", "https://..."],    // Inference endpoint
-    ["onion", "<tor-onion-address>"], // Tor hidden service endpoint
-  ],
-  "content": "Human-readable description"
+    ["d", "<unique-provider-identifier>"],
+    ["u", "https://..."],      // HTTP endpoint
+    ["u", "<tor-onion-address>"],  // Tor hidden service endpoint
+    ["models", "gpt-4o-mini", "gpt-4o", "claude-3-5-sonnet", "..."],
+    ["mint", "https://mint.example.com"],
+    ["version", "0.0.1"]
+  ]
 }
 ```
 
-Clients subscribe to Kind 40500, index by `d` tag, and override older listings with newer events.
+### Model Capabilities (Optional)
+
+Providers MAY include additional tags to describe model-specific capabilities:
+
+```json
+{
+  "tags": [
+    ["model-cap", "gpt-4o", "max_tokens:128000,vision:true,tools:true"],
+    ["model-cap", "claude-3-5-sonnet", "max_tokens:200000,vision:true,tools:true"]
+  ]
+}
+```
+
+## Recommendation Event
+
+**Kind**: 38000 (as defined in NIP-87)
+
+```json
+{
+  "kind": 38000,
+  "pubkey": "<recommender-user-pubkey>",
+  "tags": [
+    ["k", "38421"],
+    ["d", "<d-identifier>"],
+    ["u", "<recommended-routstr-http-url>"],
+    ["a", "38421:routstr-provider-pubkey:<d-identifier>", "wss://relay1"]
+  ],
+  "content": "Fast and reliable AI proxy with great model selection"
+}
+```
+
+## Discovery
+
+Clients can discover providers by:
+
+1. Querying for `kind:38000` events with `#k` filter for `38421` (recommendations)
+2. Directly querying for `kind:38421` events (provider announcements)
+
+Provider events are replaceable by the `d` tag, with newer events overriding older listings.