max / quasi

Emit the plain description meta a search engine reads 1e35bc8a. Screen::summarised reached og:description and twitter:description and stopped, so a described document emitted the pair a share sheet reads and left the host to append the one a search engine reads. MNW's /pricing was doing that through Shell::head -- an escape hatch spending itself on something a described property already carries. Under indexable, unlike the social pair: a screen that has told crawlers not to index it gains nothing by describing itself to them, while a noindex page can still be linked and still owes a share sheet a preview. Measured before choosing the gate: MNW's five embeds, the case where a search description would be wrong, call summarised nowhere and so emit nothing either way. The gate is what keeps that true when one starts.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0136sbU8F6i9WrcvA3wn4Lgk

Author: Max Johnson <me@maxj.phd> · 2026-08-29 17:43 UTC

Signed with PGP, not checked

Commit: 1be61d1efda486c04727dae64d6b6cd0e9912862

Parent: 2072bce

3 files changed, +75 insertions, -5 deletions

M Cargo.lock +4 -4

			@@ -6211,10 +6211,6 @@
6211	6211		"winnow 1.0.4",
6212	6212		]
6213	6213
6214		-	[[patch.unused]]
6215		-	name = "synckit-client"
6216		-	version = "0.10.0"
6217		-
6218	6214		[[patch.unused]]
6219	6215		name = "kberg"
6220	6216		version = "0.1.0"
			@@ -6234,3 +6230,7 @@
6234	6230		[[patch.unused]]
6235	6231		name = "quasi-type"
6236	6232		version = "0.1.3"
	6233	+
	6234	+	[[patch.unused]]
	6235	+	name = "synckit-client"
	6236	+	version = "0.10.0"

M crates/quasi-webview/src/shell.rs +22

			@@ -996,6 +996,28 @@
996	996		named("twitter:image", image);
997	997		}
998	998
	999	+	// The plain one, which is what a search engine reads. The pair above is
	1000	+	// what a share sheet reads, and `base.html` emitted all three off one
	1001	+	// string; a described document emitted two and left the host to append
	1002	+	// the third through `Shell::head`, which is an escape hatch spending
	1003	+	// itself on something the description already carries.
	1004	+	//
	1005	+	// Under `indexable`, unlike the social pair, and the asymmetry is the
	1006	+	// point: a screen that has told crawlers not to index it has nothing to
	1007	+	// gain from describing itself to them, while a noindex page can still
	1008	+	// be linked and still owes a share sheet a preview.
	1009	+	//
	1010	+	// Measured 2026-08-29 before choosing the gate: MNW's five embeds -- an
	1011	+	// iframe widget is the case where a search description would be wrong,
	1012	+	// since it would compete with the page framing it -- call `summarised`
	1013	+	// nowhere, so they emit nothing either way. The gate is what keeps that
	1014	+	// true when one of them starts.
	1015	+	if discovery.indexable
	1016	+	&& let Some(summary) = &discovery.summary
	1017	+	{
	1018	+	named("description", summary);
	1019	+	}
	1020	+
999	1021		if !discovery.indexable {
1000	1022		named("robots", "noindex");
1001	1023		}

M crates/quasi-webview/src/tests.rs +49 -1

			@@ -2878,12 +2878,60 @@
2878	2878		assert!(!html.contains("robots"), "{html}");
2879	2879
2880	2880		// A None emits nothing rather than an empty tag. A preview showing a blank
2881		-	// line reads as a broken page.
	2881	+	// line reads as a broken page, and an empty `description` is a page telling
	2882	+	// a search engine it is about nothing.
2882	2883		assert!(!html.contains("og:description"), "{html}");
	2884	+	assert!(!html.contains("name=\"description\""), "{html}");
2883	2885		assert!(!html.contains("og:image"), "{html}");
2884	2886		assert!(!html.contains("canonical"), "{html}");
2885	2887		}
2886	2888
	2889	+	/// `1e35bc8a`. One summary, three tags: the pair a share sheet reads and the
	2890	+	/// plain one a search engine reads. MNW's `base.html` emitted all three and the
	2891	+	/// described document emitted two, so `/pricing` was appending the third
	2892	+	/// through `Shell::head`.
	2893	+	#[test]
	2894	+	fn a_summary_reaches_the_plain_description_meta_and_not_only_the_social_pair() {
	2895	+	let html = render(&Screen::sidebar_content("Pricing").summarised("What you keep."));
	2896	+
	2897	+	assert!(
	2898	+	html.contains("<meta name=\"description\" content=\"What you keep.\">"),
	2899	+	"{html}"
	2900	+	);
	2901	+	// Beside the pair rather than instead of it. All three say the same thing
	2902	+	// and are read by different things.
	2903	+	assert!(
	2904	+	html.contains("<meta property=\"og:description\" content=\"What you keep.\">"),
	2905	+	"{html}"
	2906	+	);
	2907	+	assert!(
	2908	+	html.contains("<meta name=\"twitter:description\" content=\"What you keep.\">"),
	2909	+	"{html}"
	2910	+	);
	2911	+	}
	2912	+
	2913	+	/// A screen that has told crawlers to go away has nothing to gain from
	2914	+	/// describing itself to them -- but a noindex page can still be linked, so the
	2915	+	/// share sheet keeps its preview. The asymmetry is deliberate.
	2916	+	#[test]
	2917	+	fn a_screen_that_refuses_indexing_keeps_its_preview_and_drops_its_description() {
	2918	+	let html = render(
	2919	+	&Screen::sidebar_content("Downloads")
	2920	+	.summarised("Your purchases.")
	2921	+	.indexed(false),
	2922	+	);
	2923	+
	2924	+	assert!(!html.contains("name=\"description\""), "{html}");
	2925	+	assert!(
	2926	+	html.contains("<meta property=\"og:description\" content=\"Your purchases.\">"),
	2927	+	"{html}"
	2928	+	);
	2929	+	assert!(
	2930	+	html.contains("<meta name=\"robots\" content=\"noindex\">"),
	2931	+	"{html}"
	2932	+	);
	2933	+	}
	2934	+
2887	2935		#[test]
2888	2936		fn a_purchased_content_screen_can_say_it_is_not_for_crawlers() {
2889	2937		// Six of the server's screens. This is the assertion the whole decision