diff --git a/_extensions/MHellmund/julia-color/LICENSE_quarto_bookext.txt b/_extensions/MHellmund/julia-color/LICENSE_quarto_bookext.txt
new file mode 100644
index 0000000..a9be13f
--- /dev/null
+++ b/_extensions/MHellmund/julia-color/LICENSE_quarto_bookext.txt
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Posit Software, PBC
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/_extensions/MHellmund/julia-color/_extension.yml b/_extensions/MHellmund/julia-color/_extension.yml
index ac280a4..a1da862 100644
--- a/_extensions/MHellmund/julia-color/_extension.yml
+++ b/_extensions/MHellmund/julia-color/_extension.yml
@@ -1,7 +1,7 @@
 title: Julia-color
 author: Meik Hellmund
 version: 1.0.0
-quarto-required: ">=99.9.0"
+quarto-required: ">=1.9.0"
 contributes:
   formats:
     common:
@@ -14,8 +14,18 @@ contributes:
         - "resources/css/juliamono.css"
     pdf:
       include-in-header:
-       - "resources/tex/juliainc.tex"
+        - "resources/tex/juliainc.tex"
 
     typst:   
       include-in-header:
-       - "resources/typst/juliainc.typ"
+        - "resources/typst/juliainc.typ"
+      # the following is from   
+      # quarto-cli/src/resources/extension-subtrees/orange-book/_extensions/orange-book
+      # comment out for an article
+      template-partials:
+        - numbering.typ
+        - page.typ
+        - typst-show.typ
+      filters:
+        - path: orange-book.lua
+          at: post-quarto
diff --git a/_extensions/MHellmund/julia-color/ansi2htmltex.lua b/_extensions/MHellmund/julia-color/ansi2htmltex.lua
index c8050c5..12019b9 100644
--- a/_extensions/MHellmund/julia-color/ansi2htmltex.lua
+++ b/_extensions/MHellmund/julia-color/ansi2htmltex.lua
@@ -1,6 +1,8 @@
 -- based on
 -- https://github.com/jupyter/nbconvert/blob/main/nbconvert/filters/ansi.py
 
+-- debug: pandoc -t native file.{typst,html,..}.md
+
 local ANSI_COLORS = {
     "ansi-black",
     "ansi-red",
@@ -224,18 +226,47 @@ local function HTMLconverter(fg, bg, bold, light, italic, underline, inverse)
     return starttag..">","</span>"
 end
 
-   
+local function escapeTypstString(s)
+    s = s:gsub("\\", "\\\\")
+    s = s:gsub("%$", "\\$")
+    s = s:gsub("*", "\\*")
+    s = s:gsub([["]],[[\"]])
+    return s
+end
+
+local function escapeTypstString2(s)
+    s = s:gsub("@", "\\@")
+    s = s:gsub("<", "\\<")
+    s = s:gsub("#", "\\#")
+    s = s:gsub(">", "\\>")
+    --s = s:gsub("]","\\]")
+    s = s:gsub("\n","\\\n")
+    s = s:gsub("+","\\+")
+    s = s:gsub("/","\\/")
+    s = s:gsub("=","\\=")
+    return s
+end
+
+
+local function noescapeString(s)
+    return s
+end
+
+
 local function codeBlockTrans(e)
-    local converter, fmt
+    local converter, fmt, escapeString
     if quarto.doc.isFormat('latex') then
         converter = LaTeXconverter
         fmt = 'latex'
+        escapeString = noescapeString
     elseif quarto.doc.isFormat('html') then
         converter = HTMLconverter
         fmt = 'html'
+        escapeString = noescapeString
     elseif quarto.doc.isFormat('typst') then
         converter = Typstconverter
         fmt = 'typst'
+        escapeString = escapeTypstString
     else
         return
     end
@@ -264,7 +295,7 @@ local function codeBlockTrans(e)
     local out=""
     local text = e.text
 
-    -- we remove links (eg in julia ParseErrors. THey link to local files, so they are useless anyway)
+    -- we remove links (eg in julia ParseErrors. They link to local files, so they are useless anyway)
     text = text:gsub("\x1b%]8;.-\x1b\\", "")
     
     if string.find(text, "\x1b%[") then
@@ -305,7 +336,7 @@ local function codeBlockTrans(e)
                 else
                     starttag, endtag = converter(fg, bg, bold, light, italic, underline, inverse)
                 end    
-                out = out .. starttag .. chunk .. endtag
+                out = out .. starttag .. escapeString(chunk) .. endtag
             end
 
             while next(numbers) ~= nil do
@@ -359,7 +390,7 @@ local function codeBlockTrans(e)
             end
         end
     else
-        out = text
+        out = escapeString(text)
     end
     if fmt == 'html' then
         return pandoc.RawBlock(fmt,
@@ -369,7 +400,11 @@ local function codeBlockTrans(e)
         return pandoc.RawBlock(fmt, [[\begin{]]..texenv.."}\n"..out.."\n"..[[\end{]].. texenv .. "}")
     end
     if fmt == 'typst' then
-        return pandoc.RawBlock(fmt, "#"..texenv.."[\n"..out.."\n]")
+        if texenv == "OutputCell" then
+            return pandoc.RawBlock(fmt, "#"..texenv.."[\n" .. escapeTypstString2(out) .. "\n]")
+        else
+            return pandoc.RawBlock(fmt, "#"..texenv.."[\n" .. out .. "\n]")
+        end
     end
 
 
@@ -398,12 +433,52 @@ local function divCodeBlockNoHeader1(e)
         if el.t == 'Header' then
             el.level = 6
         end
+--        if el.t == 'CodeBlock' then     -- attempt for typst, but we use an extra quarto cell
+--            for i,v in ipairs(el.classes) do
+--                if v=="julia" or v=="jldoctest" then  -- example code and before
+--                    el.classes:remove(i)
+--               end
+--            end
+--        end
     end
     return e
 end
 
+
+-- test if two divs should be merged
+local function testmerge(d1, d2)
+    return d1 and d1.t == "Div"  and d1.classes:includes("cell-output") and #d1.content == 1
+        and  d2 and d2.t == "Div"  and d2.classes:includes("cell-output") and #d2.content == 1
+        and  d1.content[1].t == "CodeBlock" and not d1.classes:includes("cell-output-stderr")
+        and  d2.content[1].t == "CodeBlock" and not d2.classes:includes("cell-output-stderr")
+end
+
+-- merge (div (codecell (text1)), div (codecell(text2))) to div(codecell(text1+text2))
+local function blockMerge(es)
+    local nl = ""
+    for i = #es-1, 1, -1 do
+        if testmerge(es[i], es[i+1]) then
+            str1 = es[i].content[1].text
+            str2 = es[i+1].content[1].text
+            nl = "\n"
+            if es[i].classes:includes("cell-output-stdout") and  es[i+1].classes:includes("cell-output-stdout") then
+                if str1:sub(-1) == "\n" then
+                    nl = ""
+                end
+                if str2:sub(1, 1) == "\n" then
+                    nl = ""
+                end
+            end
+            es[i].content[1].text = str1 .. nl .. str2
+            es:remove(i+1)
+        end
+    end
+    return es
+end
+
 return {
     {Div = divStderr},
     {Div = divCodeBlockNoHeader1},
+    {Blocks = blockMerge},
     {CodeBlock = codeBlockTrans},
 }
diff --git a/_extensions/MHellmund/julia-color/numbering.typ b/_extensions/MHellmund/julia-color/numbering.typ
new file mode 100644
index 0000000..2f0e3ce
--- /dev/null
+++ b/_extensions/MHellmund/julia-color/numbering.typ
@@ -0,0 +1,38 @@
+// Chapter-based numbering for books with appendix support
+#let equation-numbering = it => {
+  let pattern = if state("appendix-state", none).get() != none { "(A.1)" } else { "(1.1)" }
+  numbering(pattern, counter(heading).get().first(), it)
+}
+#let callout-numbering = it => {
+  let pattern = if state("appendix-state", none).get() != none { "A.1" } else { "1.1" }
+  numbering(pattern, counter(heading).get().first(), it)
+}
+#let subfloat-numbering(n-super, subfloat-idx) = {
+  let chapter = counter(heading).get().first()
+  let pattern = if state("appendix-state", none).get() != none { "A.1a" } else { "1.1a" }
+  numbering(pattern, chapter, n-super, subfloat-idx)
+}
+// Theorem configuration for theorion
+// Chapter-based numbering (H1 = chapters)
+#let theorem-inherited-levels = 1
+
+// Appendix-aware theorem numbering
+#let theorem-numbering(loc) = {
+  if state("appendix-state", none).at(loc) != none { "A.1" } else { "1.1" }
+}
+
+// Theorem render function
+// Note: brand-color is not available at this point in template processing
+#let theorem-render(prefix: none, title: "", full-title: auto, body) = {
+  block(
+    width: 100%,
+    inset: (left: 1em),
+    stroke: (left: 2pt + black),
+  )[
+    #if full-title != "" and full-title != auto and full-title != none {
+      strong[#full-title]
+      linebreak()
+    }
+    #body
+  ]
+}
diff --git a/_extensions/MHellmund/julia-color/orange-book.lua b/_extensions/MHellmund/julia-color/orange-book.lua
new file mode 100644
index 0000000..4729030
--- /dev/null
+++ b/_extensions/MHellmund/julia-color/orange-book.lua
@@ -0,0 +1,69 @@
+-- orange-book.lua
+-- Orange-book specific part and appendix handling for Typst books
+
+local function is_typst_book()
+  local file_state = quarto.doc.file_metadata()
+  return quarto.doc.is_format("typst") and
+         file_state ~= nil and
+         file_state.file ~= nil
+end
+
+local header_filter = {
+  Header = function(el)
+    local file_state = quarto.doc.file_metadata()
+
+    if not is_typst_book() then
+      return nil
+    end
+
+    if file_state == nil or file_state.file == nil then
+      return nil
+    end
+
+    local file = file_state.file
+    local bookItemType = file.bookItemType
+
+    if el.level ~= 1 or bookItemType == nil then
+      return nil
+    end
+
+    -- Handle parts
+    if bookItemType == "part" then
+      return pandoc.RawBlock('typst', '#part[' .. pandoc.utils.stringify(el.content) .. ']')
+    end
+
+    -- Handle appendices
+    if bookItemType == "appendix" then
+      -- First appendix triggers the show rule with localized "Appendices" title
+      if file.bookItemNumber == 1 or file.bookItemNumber == nil then
+        -- Get localized title from language settings
+        local language = quarto.doc.language
+        local appendicesTitle = (language and language["section-title-appendices"]) or "Appendices"
+
+        -- Use hide-parent: true to work around orange-book bug where unnumbered headings
+        -- (like Bibliography) trigger duplicate "Appendices" TOC entries.
+        local appendixStart = pandoc.RawBlock('typst',
+          '#show: appendices.with("' .. appendicesTitle .. '", hide-parent: true)')
+
+        -- If this is the synthetic "Appendices" divider heading (has .unnumbered class),
+        -- emit our own Appendices heading for TOC display
+        if el.classes:includes("unnumbered") then
+          local appendicesHeading = pandoc.RawBlock('typst',
+            '#heading(level: 1, numbering: none)[' .. appendicesTitle .. ']')
+          return {appendixStart, appendicesHeading}
+        end
+
+        return {appendixStart, el}
+      end
+    end
+
+    return nil
+  end
+}
+
+-- Combine with file_metadata_filter so book metadata markers are parsed
+-- during this filter's document traversal (needed for bookItemType, etc.)
+return quarto.utils.combineFilters({
+  quarto.utils.file_metadata_filter(),
+  header_filter
+})
diff --git a/_extensions/MHellmund/julia-color/page.typ b/_extensions/MHellmund/julia-color/page.typ
new file mode 100644
index 0000000..488bf47
--- /dev/null
+++ b/_extensions/MHellmund/julia-color/page.typ
@@ -0,0 +1,15 @@
+#set page(
+  paper: $if(papersize)$"$papersize$"$else$"us-letter"$endif$,
+$if(margin-geometry)$
+  // Margins handled by marginalia.setup in typst-show.typ AFTER book.with()
+$elseif(margin)$
+  margin: ($for(margin/pairs)$$margin.key$: $margin.value$,$endfor$),
+$else$
+  margin: (x: 1.25in, y: 1.25in),
+$endif$
+  numbering: $if(page-numbering)$"$page-numbering$"$else$none$endif$,
+  columns: $if(columns)$$columns$$else$1$endif$,
+)
+// Logo is handled by orange-book's cover page, not as a page background
+// NOTE: marginalia.setup is called in typst-show.typ AFTER book.with()
+// to ensure marginalia's margins override the book format's default margins
diff --git a/_extensions/MHellmund/julia-color/resources/typst/juliainc.typ b/_extensions/MHellmund/julia-color/resources/typst/juliainc.typ
index ba12ab3..580a58c 100644
--- a/_extensions/MHellmund/julia-color/resources/typst/juliainc.typ
+++ b/_extensions/MHellmund/julia-color/resources/typst/juliainc.typ
@@ -2,10 +2,45 @@
 #show raw:           set text(font: "JuliaMono")
 
 // define cell layout
-#let OutputCell = block.with(width:100%, inset: 5pt)
-#let AnsiOutputCell = block.with(width: 100%, inset: 5pt)
+
+//#let EndLine() = raw("\n")
+//#let OutputCell(lines) = {
+//   let blocks = []
+//   for ln in lines {
+//     blocks = blocks + ln + EndLine()
+//   }
+//   block(width:100%, inset:(x:5pt, y:0pt), stroke:( left: 2pt + gray), blocks)
+//}
+
+#let OutputCell(content) = block(
+  width: 100%, 
+  inset: (x: 5pt, y: 5pt), 
+  above: 0pt, 
+  below: 8pt, 
+  stroke: (left: 2pt + gray, bottom: .5pt + gray)
+)[
+  #set text(font: "JuliaMono", size:8pt)
+  #content
+]
+
+
+#let AnsiOutputCell(content) = block(
+  width: 100%, 
+  inset: (x: 5pt, y: 5pt), 
+  above: 0pt, 
+  below: 8pt, 
+  stroke: (left: 2pt + gray, bottom: .5pt + gray)
+)[
+  #set text(font: "JuliaMono", size:9pt)
+  #content
+]
+
+
+
+// does not exist with julia engine
 #let StderrOutputCell = block.with(width: 100%, stroke: 1pt + red, inset: 5pt)
 
+
 //#set highlight(top-edge: "ascender", bottom-edge: "descender")
 #let invertbox(color, c) = box(outset: (x: 0.05em, y: 0.25em), fill: color, c)
 
diff --git a/_extensions/MHellmund/julia-color/typst-show.typ b/_extensions/MHellmund/julia-color/typst-show.typ
new file mode 100644
index 0000000..337128f
--- /dev/null
+++ b/_extensions/MHellmund/julia-color/typst-show.typ
@@ -0,0 +1,61 @@
+#import "@preview/orange-book:0.7.1": book, part, chapter, appendices
+
+#show: book.with(
+$if(title)$
+  title: [$title$],
+$endif$
+$if(subtitle)$
+  subtitle: [$subtitle$],
+$endif$
+$if(by-author)$
+  author: "$for(by-author)$$it.name.literal$$sep$, $endfor$",
+$endif$
+$if(date)$
+  date: "$date$",
+$endif$
+$if(lang)$
+  lang: "$lang$",
+$endif$
+  main-color: brand-color.at("primary", default: blue),
+  logo: {
+    let logo-info = brand-logo.at("medium", default: none)
+    if logo-info != none { image(logo-info.path, alt: logo-info.at("alt", default: none)) }
+  },
+$if(toc-depth)$
+  outline-depth: $toc-depth$,
+$endif$
+$if(lof)$
+  list-of-figure-title: "$if(crossref.lof-title)$$crossref.lof-title$$else$$crossref-lof-title$$endif$",
+$endif$
+$if(lot)$
+  list-of-table-title: "$if(crossref.lot-title)$$crossref.lot-title$$else$$crossref-lot-title$$endif$",
+$endif$
+$if(margin-geometry)$
+  padded-heading-number: false,
+$endif$
+)
+
+$if(margin-geometry)$
+// Configure marginalia page geometry for book context
+// Geometry computed by Quarto's meta.lua filter (typstGeometryFromPaperWidth)
+// IMPORTANT: This must come AFTER book.with() to override the book format's margin settings
+#import "@preview/marginalia:0.3.1" as marginalia
+
+#show: marginalia.setup.with(
+  inner: (
+    far: $margin-geometry.inner.far$,
+    width: $margin-geometry.inner.width$,
+    sep: $margin-geometry.inner.separation$,
+  ),
+  outer: (
+    far: $margin-geometry.outer.far$,
+    width: $margin-geometry.outer.width$,
+    sep: $margin-geometry.outer.separation$,
+  ),
+  top: $if(margin.top)$$margin.top$$else$1.25in$endif$,
+  bottom: $if(margin.bottom)$$margin.bottom$$else$1.25in$endif$,
+  // CRITICAL: Enable book mode for recto/verso awareness
+  book: true,
+  clearance: $margin-geometry.clearance$,
+)
+$endif$