diff --git a/CLAUDE.md b/CLAUDE.md
index c0ffc77..35e0735 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -100,12 +100,8 @@ Update the changelog whenever you:
 - Update dependencies or requirements
 
 ### How to Update
-1. **Add a new version section** at the top of the changelog (after `== Changelog ==`)
-2. **Increment version number** appropriately:
-   - Patch (X.X.1): Bug fixes, minor improvements
-   - Minor (X.1.0): New features, non-breaking changes
-   - Major (1.X.0): Breaking changes, major rewrites
-3. **Write clear, user-focused descriptions**:
+1. **Add entries to the current (unreleased) version section** at the top of the changelog. Do NOT create a new version section or bump version numbers unless explicitly asked — versions are only bumped at release time.
+2. **Write clear, user-focused descriptions**:
    - Start with action words (Fixed, Added, Improved, etc.)
    - Describe the user impact, not technical details
    - Reference GitHub issue numbers when applicable: `[#123]`
@@ -122,7 +118,7 @@ Update the changelog whenever you:
 ```
 
 ### Version Consistency
-Also update the version number in:
+Only bump version numbers when explicitly asked to cut a release. When bumping, update in:
 - `mayo-events-manager.php` (line 23: `MAYO_VERSION` constant)
 - `readme.txt` (line 8: `Stable tag`)
 - `package.json` (line 3: `version`)
diff --git a/assets/css/admin.css b/assets/css/admin.css
index 10df1bf..86bbcff 100644
--- a/assets/css/admin.css
+++ b/assets/css/admin.css
@@ -428,6 +428,13 @@
     margin-top: 20px !important;
 }
 
+.mayo-source-id-row {
+    display: inline-flex;
+    align-items: center;
+    gap: 8px;
+    margin-bottom: 8px;
+}
+
 .mayo-source-id {
     font-family: monospace;
     color: #2271b1;
@@ -436,6 +443,22 @@
     padding: 4px 8px;
     border-radius: 3px;
     border: 1px solid #c5d9ed;
+    user-select: all;
+}
+
+.mayo-copy-id {
+    display: inline-flex;
+    align-items: center;
+    padding: 2px 4px;
+    background: none;
+    border: 1px solid #c5d9ed;
+    border-radius: 3px;
+    cursor: pointer;
+    color: #2271b1;
+}
+
+.mayo-copy-id:hover {
+    background: #f0f7fc;
 }
 
 /* Recurring Indicator Styles */
diff --git a/assets/js/src/components/admin/Settings.js b/assets/js/src/components/admin/Settings.js
index 2118c5e..3d2c483 100644
--- a/assets/js/src/components/admin/Settings.js
+++ b/assets/js/src/components/admin/Settings.js
@@ -236,6 +236,19 @@ const Settings = () => {
         }
     };
 
+    const handleCopyId = async (id) => {
+        try {
+            await navigator.clipboard.writeText(id);
+        } catch (err) {
+            const textArea = document.createElement('textarea');
+            textArea.value = id;
+            document.body.appendChild(textArea);
+            textArea.select();
+            try { document.execCommand('copy'); } catch (e) {}
+            document.body.removeChild(textArea);
+        }
+    };
+
     const handleDeleteSource = async (index) => {
         if (!confirm('Are you sure you want to delete this external source?')) return;
 
@@ -427,12 +440,23 @@ const Settings = () => {
                                 <div className="mayo-external-source-info">
                                     <strong>{source.name || source.url}</strong>
                                     <div className="mayo-external-source-details">
-                                        <span className="mayo-source-id">ID: {source.id}</span>
-                                        <span>Type: {source.event_type || 'All'}</span>
-                                        {source.service_body && <span>Service Body: {source.service_body}</span>}
-                                        <span className={`mayo-source-status ${source.enabled ? 'enabled' : 'disabled'}`}>
-                                            {source.enabled ? 'Enabled' : 'Disabled'}
-                                        </span>
+                                        <div className="mayo-source-id-row">
+                                            <code className="mayo-source-id">{source.id}</code>
+                                            <button
+                                                className="mayo-copy-id"
+                                                onClick={() => handleCopyId(source.id)}
+                                                title="Copy ID"
+                                            >
+                                                Copy ID to clipboard
+                                            </button>
+                                        </div>
+                                        <div className="mayo-source-meta">
+                                            <span>Type: {source.event_type || 'All'}</span>
+                                            {source.service_body && <span>Service Body: {source.service_body}</span>}
+                                            <span className={`mayo-source-status ${source.enabled ? 'enabled' : 'disabled'}`}>
+                                                {source.enabled ? 'Enabled' : 'Disabled'}
+                                            </span>
+                                        </div>
                                     </div>
                                 </div>
                                 <div className="mayo-external-source-actions">
diff --git a/readme.txt b/readme.txt
index b4c1588..abdc3c6 100644
--- a/readme.txt
+++ b/readme.txt
@@ -188,6 +188,8 @@ This project is licensed under the GPL v2 or later.
 == Changelog ==
 
 = 1.8.8 =
+* Added copy-to-clipboard button for external source IDs in Settings, making IDs easier to select and copy. [#254]
+* Improved external source layout with ID displayed in a distinct box on its own row.
 * Added diagnostic timing instrumentation to the events API for debugging slow external source requests. Append `&debug=1` to see per-call timing breakdown.
 * Improved performance of external source fetching by parallelizing HTTP requests. Sites with multiple external sources will see significantly faster load times.
 * Changed external source event type dropdown from "Select an event type" to "All Event Types" to clarify that leaving it blank fetches all types.