From 85b900258caf1f7f4386c296f225cee2ea6b712f Mon Sep 17 00:00:00 2001
From: Shivaram Lingamneni <slingamn@cs.stanford.edu>
Date: Tue, 7 Jul 2026 07:31:06 +0000
Subject: [PATCH] implement draft/whoami

---
 gencapdefs.py    | 6 ++++++
 irc/caps/defs.go | 7 ++++++-
 irc/server.go    | 3 +++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/gencapdefs.py b/gencapdefs.py
index 0238ad45..08121cca 100644
--- a/gencapdefs.py
+++ b/gencapdefs.py
@@ -255,6 +255,12 @@ CAPDEFS = [
         url="https://github.com/ircv3/ircv3-specifications/pull/613",
         standard="draft IRCv3",
     ),
+    CapDef(
+        identifier="Whoami",
+        name="draft/whoami",
+        url="https://github.com/ircv3/ircv3-specifications/pull/603",
+        standard="proposed IRCv3",
+    ),
 ]
 
 def validate_defs():
diff --git a/irc/caps/defs.go b/irc/caps/defs.go
index 8595d0dc..0a374b1a 100644
--- a/irc/caps/defs.go
+++ b/irc/caps/defs.go
@@ -7,7 +7,7 @@ package caps
 
 const (
 	// number of recognized capabilities:
-	numCapabs = 40
+	numCapabs = 41
 	// length of the uint32 array that represents the bitset:
 	bitsetLen = 2
 )
@@ -101,6 +101,10 @@ const (
 	// https://github.com/ircv3/ircv3-specifications/pull/471
 	WebPush Capability = iota
 
+	// Whoami is the proposed IRCv3 capability named "draft/whoami":
+	// https://github.com/ircv3/ircv3-specifications/pull/603
+	Whoami Capability = iota
+
 	// EchoMessage is the IRCv3 capability named "echo-message":
 	// https://ircv3.net/specs/extensions/echo-message-3.2.html
 	EchoMessage Capability = iota
@@ -199,6 +203,7 @@ var (
 		"draft/read-marker",
 		"draft/relaymsg",
 		"draft/webpush",
+		"draft/whoami",
 		"echo-message",
 		"ergo.chat/nope",
 		"extended-join",
diff --git a/irc/server.go b/irc/server.go
index 21edbf5e..19152017 100644
--- a/irc/server.go
+++ b/irc/server.go
@@ -524,6 +524,9 @@ func (server *Server) playRegistrationBurst(session *Session) {
 	if !(rb.session.capabilities.Has(caps.ExtendedISupport) && rb.session.isupportSentPrereg) {
 		server.RplISupport(c, rb)
 	}
+	if session.capabilities.Has(caps.Whoami) {
+		rb.Add(nil, d.nickMask, "SETNAME", d.realname)
+	}
 	if session.capabilities.Has(caps.Metadata) {
 		playMetadataVerbBatch(rb, d.nick, c.ListMetadata())
 	}