Add nostrlib to agents stuff

.agents/skills/research-chapter/SKILL.md

@@ -40,10 +40,11 @@ Each sub-agent should:
 3. Return a detailed summary focusing **only on functionality relevant to the chapter topic**
    — ignore unrelated parts of the library
 
-The six code reference implementations to analyze:
+The seven code reference implementations to analyze:
 - `ref/applesauce` (TypeScript — noStrudel ecosystem)
 - `ref/ndk` (TypeScript — Nostr Development Kit)
 - `ref/nostr-gadgets` (TypeScript — high-level utilities, JSR)
+- `ref/nostrlib` (Go — fiatjaf's comprehensive Go library)
 - `ref/nostr-tools` (TypeScript — low-level tools, minimal deps)
 - `ref/rust-nostr` (Rust — full implementation, multiple crates)
 - `ref/welshman` (TypeScript — extracted from Coracle client)
@@ -77,6 +78,9 @@ The research file should have this structure:
 ### nostr-gadgets
 <detailed findings>
 
+### nostrlib
+<detailed findings>
+
 ### nostr-tools
 <detailed findings>