diff --git a/skills/comms-cli/SKILL.md b/skills/comms-cli/SKILL.md
index 8e6fe8c..bb3a864 100644
--- a/skills/comms-cli/SKILL.md
+++ b/skills/comms-cli/SKILL.md
@@ -90,14 +90,15 @@ tdc thread view <ref> --raw       # Show raw markdown
 tdc thread create <channel-ref> "Title" "content"    # Create a new thread
 tdc thread create <channel-ref> "Title" "content" --json       # Create and return as JSON
 tdc thread create <channel-ref> "Title" "content" --json --full # Include all thread fields
-tdc thread create <channel-ref> "Title" "content" --notify 123,456  # Notify specific users
+tdc thread create <channel-ref> "Title" "content" --notify 123,456  # Notify specific users and/or groups by ID
 tdc thread create <channel-ref> "Title" "content" --unarchive  # Land thread in author's Inbox (overrides default Comms auto-archive)
 tdc thread create <channel-ref> "Title" "content" --no-unarchive  # Force archive even when userSettings.unarchiveNewThreads=true
 tdc thread create <channel-ref> "Title" "content" --dry-run  # Preview without posting
 tdc thread create <channel-ref> "Title" --file ./a.png  # Attach a file (repeatable; content optional)
 tdc thread reply <ref> "content"  # Post a comment (notifies EVERYONE_IN_THREAD by default)
 tdc thread reply <ref> "content" --notify EVERYONE  # Notify all workspace members
-tdc thread reply <ref> "content" --notify 123,id:456   # Notify specific user IDs
+tdc thread reply <ref> "content" --notify 123,id:456   # Notify specific users by ID
+tdc thread reply <ref> "content" --notify 123,Cbzzm11ZeYZoJYD4a6rti   # Notify a user and a group (group IDs are base58, not numeric)
 tdc thread reply <ref> "content" --json  # Post and return comment as JSON
 tdc thread reply <ref> "content" --json --full  # Include all comment fields
 tdc thread reply <ref> "content" --close       # Reply and close the thread
@@ -128,7 +129,7 @@ tdc thread update <ref> "New body" --json  # Update and return { id, content } a
 tdc thread update <ref> "New body" --json --full  # Update and return full thread as JSON
 ```
 
-Default `--notify` for reply is EVERYONE_IN_THREAD, which may notify more people than intended. Before posting, confirm with the user whether specific people should be notified instead (via `--notify <user-ids>`). Options: EVERYONE, EVERYONE_IN_THREAD, or comma-separated ID refs.
+Default `--notify` for reply is EVERYONE_IN_THREAD, which may notify more people than intended. Before posting, confirm with the user whether specific people should be notified instead (via `--notify <ids>`). Options: EVERYONE, EVERYONE_IN_THREAD, or comma-separated user and/or group IDs.
 
 `--notify` automatically resolves IDs: group IDs are routed to the `groups` API field, user IDs to `recipients`. No special syntax needed.
 
diff --git a/src/commands/thread/index.ts b/src/commands/thread/index.ts
index c5dab3c..8fead5f 100644
--- a/src/commands/thread/index.ts
+++ b/src/commands/thread/index.ts
@@ -50,7 +50,7 @@ Examples:
             withUnvalidatedChoices(
                 new Option(
                     '--notify <recipients>',
-                    'Notification recipients: EVERYONE, EVERYONE_IN_THREAD, or comma-separated user IDs (default: EVERYONE_IN_THREAD)',
+                    'Notification recipients: EVERYONE, EVERYONE_IN_THREAD, or comma-separated user and/or group IDs (default: EVERYONE_IN_THREAD)',
                 ),
                 ['EVERYONE', 'EVERYONE_IN_THREAD'],
             ),
@@ -68,6 +68,7 @@ Examples:
   tdc thread reply 12345 "Sounds good!"
   echo "Long reply" | tdc thread reply 12345
   tdc thread reply 12345 "Done" --close --json
+  tdc thread reply 12345 "Heads up" --notify 67890,Cbzzm11ZeYZoJYD4a6rti
   tdc thread reply 12345 "See attached" --file ./diagram.png
   tdc thread reply 12345 --file ./a.png --file ./b.pdf`,
         )
@@ -76,7 +77,7 @@ Examples:
     thread
         .command('create <channel-ref> <title> [content]')
         .description('Create a new thread in a channel')
-        .option('--notify <recipients>', 'Comma-separated user IDs to notify')
+        .option('--notify <recipients>', 'Comma-separated user and/or group IDs to notify')
         .option(
             '--unarchive',
             'Unarchive after creation so the thread appears in your Inbox (overrides userSettings.unarchiveNewThreads when false)',
diff --git a/src/lib/skills/content.ts b/src/lib/skills/content.ts
index 0335927..973f373 100644
--- a/src/lib/skills/content.ts
+++ b/src/lib/skills/content.ts
@@ -94,14 +94,15 @@ tdc thread view <ref> --raw       # Show raw markdown
 tdc thread create <channel-ref> "Title" "content"    # Create a new thread
 tdc thread create <channel-ref> "Title" "content" --json       # Create and return as JSON
 tdc thread create <channel-ref> "Title" "content" --json --full # Include all thread fields
-tdc thread create <channel-ref> "Title" "content" --notify 123,456  # Notify specific users
+tdc thread create <channel-ref> "Title" "content" --notify 123,456  # Notify specific users and/or groups by ID
 tdc thread create <channel-ref> "Title" "content" --unarchive  # Land thread in author's Inbox (overrides default Comms auto-archive)
 tdc thread create <channel-ref> "Title" "content" --no-unarchive  # Force archive even when userSettings.unarchiveNewThreads=true
 tdc thread create <channel-ref> "Title" "content" --dry-run  # Preview without posting
 tdc thread create <channel-ref> "Title" --file ./a.png  # Attach a file (repeatable; content optional)
 tdc thread reply <ref> "content"  # Post a comment (notifies EVERYONE_IN_THREAD by default)
 tdc thread reply <ref> "content" --notify EVERYONE  # Notify all workspace members
-tdc thread reply <ref> "content" --notify 123,id:456   # Notify specific user IDs
+tdc thread reply <ref> "content" --notify 123,id:456   # Notify specific users by ID
+tdc thread reply <ref> "content" --notify 123,Cbzzm11ZeYZoJYD4a6rti   # Notify a user and a group (group IDs are base58, not numeric)
 tdc thread reply <ref> "content" --json  # Post and return comment as JSON
 tdc thread reply <ref> "content" --json --full  # Include all comment fields
 tdc thread reply <ref> "content" --close       # Reply and close the thread
@@ -132,7 +133,7 @@ tdc thread update <ref> "New body" --json  # Update and return { id, content } a
 tdc thread update <ref> "New body" --json --full  # Update and return full thread as JSON
 \`\`\`
 
-Default \`--notify\` for reply is EVERYONE_IN_THREAD, which may notify more people than intended. Before posting, confirm with the user whether specific people should be notified instead (via \`--notify <user-ids>\`). Options: EVERYONE, EVERYONE_IN_THREAD, or comma-separated ID refs.
+Default \`--notify\` for reply is EVERYONE_IN_THREAD, which may notify more people than intended. Before posting, confirm with the user whether specific people should be notified instead (via \`--notify <ids>\`). Options: EVERYONE, EVERYONE_IN_THREAD, or comma-separated user and/or group IDs.
 
 \`--notify\` automatically resolves IDs: group IDs are routed to the \`groups\` API field, user IDs to \`recipients\`. No special syntax needed.