diff --git a/clog.md b/clog.md
index f62fbe4..8466e27 100644
--- a/clog.md
+++ b/clog.md
@@ -23,7 +23,7 @@ Example:
 The `HASH` S2C command
 ----------------------
 
-The `HASH` command shall be sent for hashes associated with a channel.
+The `HASH` server-to-client command shall be sent from server to client for hashes associated with a channel.
 
 Each hash must be a cryptographic hash. Non-cryptographic hashes must be ignored. Broken hash algorithms should be avoided. MD5 is explicitly disallowed and must not be used.
 
@@ -40,14 +40,34 @@ Example:
     >>> JOIN #channel
     <<< JOIN #channel
     <<< NAMES etc
-    <<< HASH #channel :sha1=20,something_long
-    <<< HASH #channel :sha1=60,something_else sha256=70,another
+    <<< HASH #channel :sha1=20/something_long
+    <<< HASH #channel :sha1=60/something_else,sha256=70/another
 
 Optionally, the server may include a server name with the HASH command:
 
     <<< :server1.example.com HASH #channel :etc
     <<< :server2.example.com HASH #channel :other
 
+The `HASH` C2S command
+----------------------
+
+The `HASH` client-to-server command shall be sent from client to server to view and manipulate a channel's hash list.
+
+To view a channel's hash list:
+
+    HASH #channel
+
+To manipulate a channel's hash list:
+
+    HASH #channel :+hash_type=counter/hash,type=counter/hash,...
+    HASH #channel :-hash_type=counter/hash,type=counter/hash,...
+
+(To add and remove hashes, respectively)
+
+Viewing a channel's hash list should be restricted to anyone capable of joining the channel. This means banned users shouldn't have access to this command.
+
+Manipulating a channel's hash list should be restricted to channel operators only.
+
 The `clog` message tag
 ----------------------
 
@@ -63,10 +83,12 @@ These hashes specify the previous "head(s)" of the clog. "Merges" are just messa
 
 The hash encompasses the message tags specified by the capability (e.g. `time` and `clog`), sorted according to UTF-8 byte order, and the contents of the IRC message, as seen in the following format:
 
-    @soniex2.github.io/clog=...;time=... :nick!user@host PRIVMSG #channel :message
+    @soniex2.github.io/clog=type=counter/full_hash,type=counter/full_hash,...;time=... :nick!user@host PRIVMSG #channel :message
 
 (This line is what gets hashed)
 
+Note the use of `full_hash` instead of `short_hash`.
+
 Examples:
 
     TODO