diff --git a/cmd/ob/main.go b/cmd/ob/main.go
index c5907747..f1e4a8cd 100644
--- a/cmd/ob/main.go
+++ b/cmd/ob/main.go
@@ -37,7 +37,7 @@ func newRootCmd() *cobra.Command {
 	g := &globalFlags{}
 	root := &cobra.Command{
 		Use:           "ob",
-		Short:         "onebox — one application, one host",
+		Short:         "onebox — one application, one server",
 		Long:          "onebox (ob) — plan-before-apply production operations for one application on one server.\n\nYou describe what the application is in ob.yml (or ob.yaml); Onebox generates\nthe Compose runtime, the names, the routing and the supporting services.\nAgentless over SSH, health-gated, journaled and fenced.",
 		Version:       version,
 		SilenceUsage:  true,
diff --git a/docs/product.md b/docs/product.md
index d01e297a..61b79465 100644
--- a/docs/product.md
+++ b/docs/product.md
@@ -1,4 +1,4 @@
-# Onebox — production operations for one application on one box
+# Onebox — production operations for one application on one server
 
 > Status: product direction
 >
diff --git a/site/astro.config.mjs b/site/astro.config.mjs
index 119dca39..5f923cb5 100644
--- a/site/astro.config.mjs
+++ b/site/astro.config.mjs
@@ -17,12 +17,21 @@ export default defineConfig({
   integrations: [
     starlight({
       title: "Onebox",
-      // Without this the landing page, whose own title is also "Onebox",
-      // renders as "Onebox | Onebox".
+      // The separator between a page's title and the site's: "Install · Onebox".
+      // It was added for the landing page, which is titled "Onebox" like the
+      // site and so read as "Onebox | Onebox" — that it still read as
+      // "Onebox · Onebox" afterwards is the part the original note missed. The
+      // landing page now sets its own title outright and does not pass through
+      // here at all; every other page does, which is what this is for.
       titleDelimiter: "·",
       description:
         "Production operations for an application intentionally running on one server.",
-      tagline: "One application. One box. Evidence-backed operations.",
+      // The project tagline, in the same words as the GitHub description and the
+      // landing page's title. Starlight renders this only on a splash page that
+      // does not supply its own hero tagline; index.mdx supplies one, so today
+      // this has no output. It is kept in step anyway, because the day a second
+      // splash page exists is not the day to discover the tagline drifted.
+      tagline: "Plan-before-apply deploys. Zero downtime. One box.",
       social: [
         {
           icon: "github",
diff --git a/site/src/content/docs/index.mdx b/site/src/content/docs/index.mdx
index 5584c86e..9f2643e4 100644
--- a/site/src/content/docs/index.mdx
+++ b/site/src/content/docs/index.mdx
@@ -3,6 +3,34 @@ title: Onebox
 description: Production operations for an application intentionally running on one server.
 summary: Landing page. What Onebox is, who it is for, and the fastest path into it.
 template: splash
+# This page's own title is the site title, so Starlight's
+# "<page title> <delimiter> <site title>" pattern rendered it as "Onebox ·
+# Onebox". titleDelimiter in astro.config.mjs chose the separator; it cannot
+# know both halves are the same word.
+#
+# Overriding here is the mechanism that works. Emitting a <title> from the Head
+# component instead produces two of them, with Starlight's own — the wrong one —
+# first; that was measured, not assumed. Starlight dedupes a frontmatter `title`
+# tag against its default, so this one replaces it rather than joining it.
+#
+# og:title is set too. Starlight defaults it to the bare page title, so without
+# this the link renders in Slack, X and LinkedIn as a card called "Onebox" —
+# identified by its own name and nothing else, which is the problem this block
+# exists to fix.
+#
+# The wording is the three beats the repository already uses on itself: the
+# GitHub description reads "plan-before-apply, zero-downtime deploys for one
+# box". As one sentence that is 61 characters and long enough to be cut short in
+# search results, so it is split into clauses rather than trimmed — every idea
+# survives. Search engines cut on rendered width rather than a character count,
+# so 59 is shorter, not guaranteed safe.
+head:
+  - tag: title
+    content: "Onebox · Plan-before-apply deploys. Zero downtime. One box."
+  - tag: meta
+    attrs:
+      property: og:title
+      content: "Onebox · Plan-before-apply deploys. Zero downtime. One box."
 hero:
   tagline: |
     Production operations for an application intentionally running on one server.