From dc504e1c8579b6ecb3c106fbbc1c99c3effe0879 Mon Sep 17 00:00:00 2001
From: Samarth Jaiswal <samarthjaiswal30@gmail.com>
Date: Thu, 12 Nov 2026 23:08:02 +0530
Subject: [PATCH] Keep logo: false through fillLogoPaths so Typst drops the
 brand logo

---
 news/changelog-1.12.md                        |  1 +
 src/core/brand/brand.ts                       |  4 +++
 .../brand/logo/typst-logo-false-format.qmd    | 28 +++++++++++++++++++
 .../brand/logo/typst-logo-false-top.qmd       | 28 +++++++++++++++++++
 4 files changed, 61 insertions(+)
 create mode 100644 tests/docs/smoke-all/brand/logo/typst-logo-false-format.qmd
 create mode 100644 tests/docs/smoke-all/brand/logo/typst-logo-false-top.qmd

diff --git a/news/changelog-1.12.md b/news/changelog-1.12.md
index bfc6660377a..efdf32fe3de 100644
--- a/news/changelog-1.12.md
+++ b/news/changelog-1.12.md
@@ -54,6 +54,7 @@ All changes included in 1.12:
 
 - ([#15168](https://github.com/quarto-dev/quarto-cli/issues/15168)): Fix definitions, examples and exercises being set in italics in Typst output with the default `theorem-appearance: simple`. Their body is now upright, as in LaTeX output, while theorems, lemmas, corollaries, propositions and conjectures keep an italic body. (author: @mcanouil)
 - ([#15251](https://github.com/quarto-dev/quarto-cli/pull/15251)): Fix algorithm blocks (`#alg-`) being set in italics with `theorem-appearance: simple` and using the colours of theorems with `theorem-appearance: fancy`. They now look like definitions, examples and exercises. (author: @mcanouil)
+- ([#15311](https://github.com/quarto-dev/quarto-cli/issues/15311)): Fix `logo: false` not removing the brand logo in Typst output. The rest of the brand still applies. (author: @SAMARTHJAISWAL)
 - ([#15320](https://github.com/quarto-dev/quarto-cli/pull/15320)): Update to Pandoc's Typst template following Pandoc 3.13 support:
   - Horizontal rules are full-width, using Typst 0.15's native `divider`. A Typst binary set with `QUARTO_TYPST` must be 0.15 or later.
   - In a tight definition list, a one-paragraph definition now sits on the same line as its term.
diff --git a/src/core/brand/brand.ts b/src/core/brand/brand.ts
index 6e1604512ec..cef5d0599e7 100644
--- a/src/core/brand/brand.ts
+++ b/src/core/brand/brand.ts
@@ -590,6 +590,10 @@ export function fillLogoPaths(
     }
     return undefined;
   }
+  if (spec === false) {
+    // keep an explicit `logo: false` so `resolveLogo()` can disable the logo
+    return false;
+  }
   if (!spec) {
     return undefined;
   }
diff --git a/tests/docs/smoke-all/brand/logo/typst-logo-false-format.qmd b/tests/docs/smoke-all/brand/logo/typst-logo-false-format.qmd
new file mode 100644
index 00000000000..8806bf3d0af
--- /dev/null
+++ b/tests/docs/smoke-all/brand/logo/typst-logo-false-format.qmd
@@ -0,0 +1,28 @@
+---
+title: Typst with logo false (format level)
+format:
+  typst:
+    output-ext: typ
+    logo: false
+brand:
+  color:
+    primary: "#1f6f8b"
+  logo:
+    images:
+      quarto:
+        path: quarto.png
+        alt: quarto logo
+    small: quarto
+_quarto:
+  tests:
+    typst:
+      ensureTypstFileRegexMatches:
+        -
+          - 'primary: rgb\("#1f6f8b"\)'
+        -
+          - 'set page\(background'
+          - 'image\("[^"]*quarto\.png"'
+---
+
+`logo: false` removes the brand logo in Typst output, while the rest of the
+brand still applies (#15311).
diff --git a/tests/docs/smoke-all/brand/logo/typst-logo-false-top.qmd b/tests/docs/smoke-all/brand/logo/typst-logo-false-top.qmd
new file mode 100644
index 00000000000..0d9fdc78ede
--- /dev/null
+++ b/tests/docs/smoke-all/brand/logo/typst-logo-false-top.qmd
@@ -0,0 +1,28 @@
+---
+title: Typst with logo false (top level)
+format:
+  typst:
+    output-ext: typ
+logo: false
+brand:
+  color:
+    primary: "#1f6f8b"
+  logo:
+    images:
+      quarto:
+        path: quarto.png
+        alt: quarto logo
+    small: quarto
+_quarto:
+  tests:
+    typst:
+      ensureTypstFileRegexMatches:
+        -
+          - 'primary: rgb\("#1f6f8b"\)'
+        -
+          - 'set page\(background'
+          - 'image\("[^"]*quarto\.png"'
+---
+
+`logo: false` removes the brand logo in Typst output, while the rest of the
+brand still applies (#15311).