diff --git a/.changeset/fit-card-descriptions.md b/.changeset/fit-card-descriptions.md
new file mode 100644
index 00000000..e1bf19e9
--- /dev/null
+++ b/.changeset/fit-card-descriptions.md
@@ -0,0 +1,5 @@
+---
+"@inkeep/open-knowledge": patch
+---
+
+Stop starter-pack and other card descriptions from overflowing their cards. The "Codebase wiki" starter pack and the slash-command MirrorSource / Mirror block previews had descriptions long enough to wrap to many lines and stretch their cards; those are now concise. The description text on the starter-pack picker, the slash-command block preview, the Navigator project-launcher cards, and the share-receive dialog is now line-clamped, so any long description truncates cleanly instead of distorting the layout.
diff --git a/packages/app/src/components/NavigatorApp.tsx b/packages/app/src/components/NavigatorApp.tsx
index d1625713..40376673 100644
--- a/packages/app/src/components/NavigatorApp.tsx
+++ b/packages/app/src/components/NavigatorApp.tsx
@@ -356,7 +356,7 @@ function NavigatorCard({ title, description, onClick, dataTestId, Icon }: Naviga
         {Icon ? <Icon className="size-4 shrink-0 text-muted-foreground" /> : null}
         <span className="font-medium text-gray-700 dark:text-foreground text-sm">{title}</span>
       </div>
-      <span className="text-muted-foreground text-xs leading-snug">{description}</span>
+      <span className="line-clamp-2 text-muted-foreground text-xs leading-snug">{description}</span>
     </Button>
   );
 }
diff --git a/packages/app/src/components/PackCardGrid.tsx b/packages/app/src/components/PackCardGrid.tsx
index 91230072..064afc42 100644
--- a/packages/app/src/components/PackCardGrid.tsx
+++ b/packages/app/src/components/PackCardGrid.tsx
@@ -161,7 +161,9 @@ function PackCard({ pack, onSelect }: PackCardProps) {
           <h3 className="text-sm font-medium leading-tight">{pack.name}</h3>
         </div>
 
-        <p className="text-1sm leading-relaxed text-muted-foreground">{pack.description}</p>
+        <p className="line-clamp-2 text-1sm leading-relaxed text-muted-foreground">
+          {pack.description}
+        </p>
       </div>
     </button>
   );
diff --git a/packages/app/src/components/ShareReceiveDialog.tsx b/packages/app/src/components/ShareReceiveDialog.tsx
index 33ba89eb..4329f475 100644
--- a/packages/app/src/components/ShareReceiveDialog.tsx
+++ b/packages/app/src/components/ShareReceiveDialog.tsx
@@ -497,8 +497,6 @@ function ShareReceiveDialogInner({
   const cloneEnabled = cloneController !== undefined && !cloneRunning;
   const cloneLabel = cloneRunning ? t`Cloning...` : t`Clone to a new folder`;
 
-  const shareOwner = share.owner;
-  const shareRepo = share.repo;
   const lookingForUrl = canonicalGitHubRemoteUrl(expected);
   const signedInLogin = authStatus?.authenticated ? authStatus.login : undefined;
   const cloneErrorMessage = cloneError?.detail ? formatCloneErrorMessage(cloneError.detail) : '';
@@ -605,10 +603,8 @@ function ShareReceiveDialogInner({
                 aria-disabled={cloneController !== undefined && !cloneEnabled}
               >
                 <span className="text-sm font-semibold">{cloneLabel}</span>
-                <span className="text-1sm text-muted-foreground">
-                  <Trans>
-                    Downloads {shareOwner}/{shareRepo} from GitHub.
-                  </Trans>
+                <span className="line-clamp-2 text-1sm text-muted-foreground">
+                  <Trans>Downloads a fresh copy from GitHub.</Trans>
                 </span>
               </button>
               <button
@@ -623,7 +619,7 @@ function ShareReceiveDialogInner({
                 <span className="text-sm font-semibold">
                   <Trans>I already have it locally →</Trans>
                 </span>
-                <span className="text-1sm text-muted-foreground">
+                <span className="line-clamp-2 text-1sm text-muted-foreground">
                   <Trans>Pick the folder where you've cloned it.</Trans>
                 </span>
               </button>
diff --git a/packages/app/src/editor/slash-command/SlashCommandMenu.tsx b/packages/app/src/editor/slash-command/SlashCommandMenu.tsx
index 2efb5504..1a8af788 100644
--- a/packages/app/src/editor/slash-command/SlashCommandMenu.tsx
+++ b/packages/app/src/editor/slash-command/SlashCommandMenu.tsx
@@ -146,7 +146,7 @@ export function SlashCommandMenu({
               <div className="mb-2 flex aspect-5/3 items-center justify-center overflow-hidden rounded-md bg-muted/40 p-3 *:max-h-full *:max-w-full [&_img]:size-full [&_img]:rounded-md [&_img]:object-contain">
                 {selectedItem.preview.render()}
               </div>
-              <p className="px-1 pb-1 text-xs text-muted-foreground">
+              <p className="line-clamp-3 px-1 pb-1 text-xs text-muted-foreground">
                 {selectedItem.preview.description}
               </p>
             </>
diff --git a/packages/app/src/editor/slash-command/component-items.test.ts b/packages/app/src/editor/slash-command/component-items.test.ts
index 25bd0963..8945dbf6 100644
--- a/packages/app/src/editor/slash-command/component-items.test.ts
+++ b/packages/app/src/editor/slash-command/component-items.test.ts
@@ -65,6 +65,18 @@ describe('getComponentItems (slash menu)', () => {
       expect(items.some((i) => i.name === `component-${compatName}`)).toBe(false);
     }
   });
+
+  test('every component preview description fits the slash aside 3-line budget (<= 120 chars)', () => {
+    const MAX_PREVIEW_DESCRIPTION_LENGTH = 120;
+    const descriptions = getComponentItems()
+      .map((i) => i.preview?.description)
+      .filter((d): d is string => typeof d === 'string');
+    expect(descriptions.length).toBeGreaterThan(0);
+    const tooLong = descriptions
+      .filter((d) => d.length > MAX_PREVIEW_DESCRIPTION_LENGTH)
+      .map((d) => `${d.length} chars: ${d.slice(0, 50)}`);
+    expect(tooLong).toEqual([]);
+  });
 });
 
 describe('createChildNode — default props on slash insert', () => {
diff --git a/packages/app/src/editor/slash-command/component-items.tsx b/packages/app/src/editor/slash-command/component-items.tsx
index f30125b7..37307f3e 100644
--- a/packages/app/src/editor/slash-command/component-items.tsx
+++ b/packages/app/src/editor/slash-command/component-items.tsx
@@ -220,7 +220,7 @@ const PREVIEW_CONFIG: Record<string, PreviewConfig> = {
     ),
   },
   Mirror: {
-    description: msg`Read-only copy of a MirrorSource block from another doc. Edit at the source — every Mirror reflects the change live.`,
+    description: msg`Read-only copy of a MirrorSource block from another doc. Edit at the source and it updates live.`,
     render: () => (
       <div className="space-y-1.5">
         <div className="relative rounded-md border border-dashed border-border/40 px-2 py-1.5">
@@ -242,7 +242,7 @@ const PREVIEW_CONFIG: Record<string, PreviewConfig> = {
     ),
   },
   MirrorSource: {
-    description: msg`Mark a block as the source of truth. Mirror references elsewhere render this content read-only and update live as you edit here.`,
+    description: msg`Mark a block as the source of truth. Mirrors elsewhere update live as you edit it.`,
     render: () => (
       <div className="space-y-1.5">
         <div className="relative rounded-md border border-dashed border-border/50 px-2 py-1.5">
diff --git a/packages/app/src/locales/en/messages.json b/packages/app/src/locales/en/messages.json
index 07c7e58f..51758f92 100644
--- a/packages/app/src/locales/en/messages.json
+++ b/packages/app/src/locales/en/messages.json
@@ -10,9 +10,6 @@
     "-3ois8": ["Hard break"],
     "-8PP0T": ["Match case"],
     "-K0AvT": ["Disconnect"],
-    "-KCZ6n": [
-      "Mark a block as the source of truth. Mirror references elsewhere render this content read-only and update live as you edit here."
-    ],
     "-LHLx7": ["edited template"],
     "-QCLWk": ["Templates available"],
     "-Qw-1t": ["GitHub authentication failed. Try signing in again."],
@@ -348,9 +345,6 @@
     "8PmoQF": ["Open the insert menu in an empty or active text position."],
     "8RtNI0": ["Failed to load documents"],
     "8S1E33": ["Search recent projects..."],
-    "8TLE9g": [
-      "Read-only copy of a MirrorSource block from another doc. Edit at the source — every Mirror reflects the change live."
-    ],
     "8XQRON": ["Loading repositories"],
     "8_brI5": ["Name is required"],
     "8cS0nH": ["Config sharing unavailable: ", ["0"], "."],
@@ -1274,6 +1268,9 @@
     "_TF8ep": ["Failed to render PDF"],
     "_VRtd7": ["Couldn't send the selection — please try again."],
     "_W-elG": ["(inline)"],
+    "_WPP7e": [
+      "Read-only copy of a MirrorSource block from another doc. Edit at the source and it updates live."
+    ],
     "_XWY2J": ["Terminal disabled"],
     "_bth6g": ["Claude Code is installed, but OpenKnowledge tools aren't connected to it yet."],
     "_eguJc": ["Uploading"],
@@ -1415,6 +1412,9 @@
     "el312q": ["Install skills into"],
     "emgiet": ["Authoritative content; mirrored verbatim everywhere it's referenced."],
     "eneWvv": ["Draft"],
+    "epuNYK": [
+      "Mark a block as the source of truth. Mirrors elsewhere update live as you edit it."
+    ],
     "euc6Ns": ["Duplicate"],
     "evs0iw": ["Tags matching \"", ["tagListQuery"], "\""],
     "f1XQyZ": ["Move block"],
@@ -1437,6 +1437,7 @@
     "fbsiBw": ["Something went wrong starting the terminal."],
     "fcgvCA": ["Claude"],
     "fiMNLl": ["Sync settings not yet loaded — try again in a moment"],
+    "fj5YiP": ["Downloads a fresh copy from GitHub."],
     "fo0VXg": ["Uninstall"],
     "fqSfXY": ["Replace"],
     "fwhX-N": ["Indent or outdent source"],
@@ -1555,7 +1556,6 @@
     "jBVUXo": ["Couldn't open the terminal — please try again."],
     "jEZ6Lf": ["provisional"],
     "jEdF24": ["Missing page: ", ["linkTitle"], ". Click to create."],
-    "jGJy-9": ["Downloads ", ["shareOwner"], "/", ["shareRepo"], " from GitHub."],
     "jKd3AP": ["Could not enable the terminal: ", ["0"]],
     "jPUPvG": ["Couldn't resolve the conflict for ", ["filePath"], "."],
     "jRHdCz": ["Failed to load PDF"],
diff --git a/packages/app/src/locales/en/messages.po b/packages/app/src/locales/en/messages.po
index f0a213a0..1a2f8135 100644
--- a/packages/app/src/locales/en/messages.po
+++ b/packages/app/src/locales/en/messages.po
@@ -2169,8 +2169,8 @@ msgid "Download started"
 msgstr "Download started"
 
 #: src/components/ShareReceiveDialog.tsx
-msgid "Downloads {shareOwner}/{shareRepo} from GitHub."
-msgstr "Downloads {shareOwner}/{shareRepo} from GitHub."
+msgid "Downloads a fresh copy from GitHub."
+msgstr "Downloads a fresh copy from GitHub."
 
 #: src/components/SkillEditorActions.tsx
 #: src/components/SkillStateBadge.tsx
@@ -3572,8 +3572,8 @@ msgid "Map the architecture"
 msgstr "Map the architecture"
 
 #: src/editor/slash-command/component-items.tsx
-msgid "Mark a block as the source of truth. Mirror references elsewhere render this content read-only and update live as you edit here."
-msgstr "Mark a block as the source of truth. Mirror references elsewhere render this content read-only and update live as you edit here."
+msgid "Mark a block as the source of truth. Mirrors elsewhere update live as you edit it."
+msgstr "Mark a block as the source of truth. Mirrors elsewhere update live as you edit it."
 
 #: src/components/EditorModeToggle.tsx
 msgid "Markdown"
@@ -4837,8 +4837,8 @@ msgid "Read through this codebase and draft a technical spec for the most comple
 msgstr "Read through this codebase and draft a technical spec for the most complex module: an overview, the architecture, key files, and open questions, all linked from a specs index page."
 
 #: src/editor/slash-command/component-items.tsx
-msgid "Read-only copy of a MirrorSource block from another doc. Edit at the source — every Mirror reflects the change live."
-msgstr "Read-only copy of a MirrorSource block from another doc. Edit at the source — every Mirror reflects the change live."
+msgid "Read-only copy of a MirrorSource block from another doc. Edit at the source and it updates live."
+msgstr "Read-only copy of a MirrorSource block from another doc. Edit at the source and it updates live."
 
 #: src/components/TrashFailureModal.tsx
 msgid "Reason: {reason}"
diff --git a/packages/app/src/locales/pseudo/messages.json b/packages/app/src/locales/pseudo/messages.json
index f3e59392..9539593b 100644
--- a/packages/app/src/locales/pseudo/messages.json
+++ b/packages/app/src/locales/pseudo/messages.json
@@ -10,9 +10,6 @@
     "-3ois8": ["Ĥàŕď ƀŕēàķ"],
     "-8PP0T": ["Ḿàţćĥ ćàśē"],
     "-K0AvT": ["Ďĩśćōńńēćţ"],
-    "-KCZ6n": [
-      "Ḿàŕķ à ƀĺōćķ àś ţĥē śōũŕćē ōƒ ţŕũţĥ. Ḿĩŕŕōŕ ŕēƒēŕēńćēś ēĺśēŵĥēŕē ŕēńďēŕ ţĥĩś ćōńţēńţ ŕēàď-ōńĺŷ àńď ũƥďàţē ĺĩvē àś ŷōũ ēďĩţ ĥēŕē."
-    ],
     "-LHLx7": ["ēďĩţēď ţēḿƥĺàţē"],
     "-QCLWk": ["Ţēḿƥĺàţēś àvàĩĺàƀĺē"],
     "-Qw-1t": ["ĜĩţĤũƀ àũţĥēńţĩćàţĩōń ƒàĩĺēď. Ţŕŷ śĩĝńĩńĝ ĩń àĝàĩń."],
@@ -348,9 +345,6 @@
     "8PmoQF": ["Ōƥēń ţĥē ĩńśēŕţ ḿēńũ ĩń àń ēḿƥţŷ ōŕ àćţĩvē ţēxţ ƥōśĩţĩōń."],
     "8RtNI0": ["Ƒàĩĺēď ţō ĺōàď ďōćũḿēńţś"],
     "8S1E33": ["Śēàŕćĥ ŕēćēńţ ƥŕōĴēćţś..."],
-    "8TLE9g": [
-      "Ŕēàď-ōńĺŷ ćōƥŷ ōƒ à ḾĩŕŕōŕŚōũŕćē ƀĺōćķ ƒŕōḿ àńōţĥēŕ ďōć. Ēďĩţ àţ ţĥē śōũŕćē — ēvēŕŷ Ḿĩŕŕōŕ ŕēƒĺēćţś ţĥē ćĥàńĝē ĺĩvē."
-    ],
     "8XQRON": ["Ĺōàďĩńĝ ŕēƥōśĩţōŕĩēś"],
     "8_brI5": ["Ńàḿē ĩś ŕēǫũĩŕēď"],
     "8cS0nH": ["Ćōńƒĩĝ śĥàŕĩńĝ ũńàvàĩĺàƀĺē: ", ["0"], "."],
@@ -1274,6 +1268,9 @@
     "_TF8ep": ["Ƒàĩĺēď ţō ŕēńďēŕ ƤĎƑ"],
     "_VRtd7": ["Ćōũĺďń'ţ śēńď ţĥē śēĺēćţĩōń — ƥĺēàśē ţŕŷ àĝàĩń."],
     "_W-elG": ["(ĩńĺĩńē)"],
+    "_WPP7e": [
+      "Ŕēàď-ōńĺŷ ćōƥŷ ōƒ à ḾĩŕŕōŕŚōũŕćē ƀĺōćķ ƒŕōḿ àńōţĥēŕ ďōć. Ēďĩţ àţ ţĥē śōũŕćē àńď ĩţ ũƥďàţēś ĺĩvē."
+    ],
     "_XWY2J": ["Ţēŕḿĩńàĺ ďĩśàƀĺēď"],
     "_bth6g": ["Ćĺàũďē Ćōďē ĩś ĩńśţàĺĺēď, ƀũţ ŌƥēńĶńōŵĺēďĝē ţōōĺś àŕēń'ţ ćōńńēćţēď ţō ĩţ ŷēţ."],
     "_eguJc": ["Ũƥĺōàďĩńĝ"],
@@ -1415,6 +1412,9 @@
     "el312q": ["Ĩńśţàĺĺ śķĩĺĺś ĩńţō"],
     "emgiet": ["Àũţĥōŕĩţàţĩvē ćōńţēńţ; ḿĩŕŕōŕēď vēŕƀàţĩḿ ēvēŕŷŵĥēŕē ĩţ'ś ŕēƒēŕēńćēď."],
     "eneWvv": ["Ďŕàƒţ"],
+    "epuNYK": [
+      "Ḿàŕķ à ƀĺōćķ àś ţĥē śōũŕćē ōƒ ţŕũţĥ. Ḿĩŕŕōŕś ēĺśēŵĥēŕē ũƥďàţē ĺĩvē àś ŷōũ ēďĩţ ĩţ."
+    ],
     "euc6Ns": ["Ďũƥĺĩćàţē"],
     "evs0iw": ["Ţàĝś ḿàţćĥĩńĝ \"", ["tagListQuery"], "\""],
     "f1XQyZ": ["Ḿōvē ƀĺōćķ"],
@@ -1437,6 +1437,7 @@
     "fbsiBw": ["Śōḿēţĥĩńĝ ŵēńţ ŵŕōńĝ śţàŕţĩńĝ ţĥē ţēŕḿĩńàĺ."],
     "fcgvCA": ["Ćĺàũďē"],
     "fiMNLl": ["Śŷńć śēţţĩńĝś ńōţ ŷēţ ĺōàďēď — ţŕŷ àĝàĩń ĩń à ḿōḿēńţ"],
+    "fj5YiP": ["Ďōŵńĺōàďś à ƒŕēśĥ ćōƥŷ ƒŕōḿ ĜĩţĤũƀ."],
     "fo0VXg": ["Ũńĩńśţàĺĺ"],
     "fqSfXY": ["Ŕēƥĺàćē"],
     "fwhX-N": ["Ĩńďēńţ ōŕ ōũţďēńţ śōũŕćē"],
@@ -1555,7 +1556,6 @@
     "jBVUXo": ["Ćōũĺďń'ţ ōƥēń ţĥē ţēŕḿĩńàĺ — ƥĺēàśē ţŕŷ àĝàĩń."],
     "jEZ6Lf": ["ƥŕōvĩśĩōńàĺ"],
     "jEdF24": ["Ḿĩśśĩńĝ ƥàĝē: ", ["linkTitle"], ". Ćĺĩćķ ţō ćŕēàţē."],
-    "jGJy-9": ["Ďōŵńĺōàďś ", ["shareOwner"], "/", ["shareRepo"], " ƒŕōḿ ĜĩţĤũƀ."],
     "jKd3AP": ["Ćōũĺď ńōţ ēńàƀĺē ţĥē ţēŕḿĩńàĺ: ", ["0"]],
     "jPUPvG": ["Ćōũĺďń'ţ ŕēśōĺvē ţĥē ćōńƒĺĩćţ ƒōŕ ", ["filePath"], "."],
     "jRHdCz": ["Ƒàĩĺēď ţō ĺōàď ƤĎƑ"],
diff --git a/packages/app/src/locales/pseudo/messages.po b/packages/app/src/locales/pseudo/messages.po
index 2a401405..16568788 100644
--- a/packages/app/src/locales/pseudo/messages.po
+++ b/packages/app/src/locales/pseudo/messages.po
@@ -2164,7 +2164,7 @@ msgid "Download started"
 msgstr ""
 
 #: src/components/ShareReceiveDialog.tsx
-msgid "Downloads {shareOwner}/{shareRepo} from GitHub."
+msgid "Downloads a fresh copy from GitHub."
 msgstr ""
 
 #: src/components/SkillEditorActions.tsx
@@ -3567,7 +3567,7 @@ msgid "Map the architecture"
 msgstr ""
 
 #: src/editor/slash-command/component-items.tsx
-msgid "Mark a block as the source of truth. Mirror references elsewhere render this content read-only and update live as you edit here."
+msgid "Mark a block as the source of truth. Mirrors elsewhere update live as you edit it."
 msgstr ""
 
 #: src/components/EditorModeToggle.tsx
@@ -4832,7 +4832,7 @@ msgid "Read through this codebase and draft a technical spec for the most comple
 msgstr ""
 
 #: src/editor/slash-command/component-items.tsx
-msgid "Read-only copy of a MirrorSource block from another doc. Edit at the source — every Mirror reflects the change live."
+msgid "Read-only copy of a MirrorSource block from another doc. Edit at the source and it updates live."
 msgstr ""
 
 #: src/components/TrashFailureModal.tsx
diff --git a/packages/server/src/seed/starter.test.ts b/packages/server/src/seed/starter.test.ts
index e46cca8f..842944d4 100644
--- a/packages/server/src/seed/starter.test.ts
+++ b/packages/server/src/seed/starter.test.ts
@@ -168,6 +168,14 @@ describe('STARTER_PACKS — all packs structural validation', () => {
     }
   });
 
+  const MAX_PACK_DESCRIPTION_LENGTH = 64;
+  test(`every pack description fits the picker card's 2-line budget (<= ${MAX_PACK_DESCRIPTION_LENGTH} chars)`, () => {
+    const tooLong = Object.values(STARTER_PACKS)
+      .filter((pack) => pack.description.length > MAX_PACK_DESCRIPTION_LENGTH)
+      .map((pack) => `${pack.id} (${pack.description.length} chars)`);
+    expect(tooLong).toEqual([]);
+  });
+
   test('every folder starterTemplate + extraTemplates resolves to a body in pack.templates', () => {
     for (const pack of Object.values(STARTER_PACKS)) {
       for (const folder of pack.folders) {
diff --git a/packages/server/src/seed/starter.ts b/packages/server/src/seed/starter.ts
index ea92b4b6..675419d7 100644
--- a/packages/server/src/seed/starter.ts
+++ b/packages/server/src/seed/starter.ts
@@ -1390,7 +1390,7 @@ export const STARTER_PACKS: Readonly<Record<PackId, StarterPack>> = {
   'codebase-wiki': {
     id: 'codebase-wiki',
     name: 'Codebase wiki',
-    description: 'Architecture, modules, and flows.',
+    description: 'A wiki to help navigate your codebase.',
     defaultSubfolder: undefined,
     folders: CODEBASE_WIKI_FOLDERS,
     templates: CODEBASE_WIKI_TEMPLATES,