diff --git a/src/resources/lua-types/quarto/doc.lua b/src/resources/lua-types/quarto/doc.lua
index 3da0e8e5eae..2642f9617dd 100644
--- a/src/resources/lua-types/quarto/doc.lua
+++ b/src/resources/lua-types/quarto/doc.lua
@@ -48,7 +48,25 @@ which must be copied into the LaTeX output directory.
 function quarto.doc.add_format_resource(file) end
 
 --[[
-Include text at the specified location (`in-header`, `before-body`, or `after-body`). 
+Add a resource file to the document. The file will be copied to the same
+relative location in the output directory.
+
+The path should be relative to the Lua script calling this function.
+]]
+---@param path string Resource file path (relative to Lua script)
+function quarto.doc.add_resource(path) end
+
+--[[
+Add a supporting file to the document. Supporting files are moved to the
+output directory and may be cleaned up after rendering.
+
+The path should be relative to the Lua script calling this function.
+]]
+---@param path string Supporting file path (relative to Lua script)
+function quarto.doc.add_supporting(path) end
+
+--[[
+Include text at the specified location (`in-header`, `before-body`, or `after-body`).
 ]]
 ---@param location 'in-header'|'before-body'|'after-body' Location for include
 ---@param text string Text to include
@@ -101,6 +119,13 @@ Does the current output format include Bootstrap themed HTML
 ---@return boolean
 function quarto.doc.has_bootstrap() end
 
+--[[
+Check whether a specific internal Quarto filter is currently active.
+]]
+---@param filter string Filter name to check
+---@return boolean
+function quarto.doc.is_filter_active(filter) end
+
 --[[
 Provides the project relative path to the current input
 if this render is in the context of a project (otherwise `nil`)
diff --git a/src/resources/lua-types/quarto/utils.lua b/src/resources/lua-types/quarto/utils.lua
index cd92c02fbf7..f1ebd4600f5 100644
--- a/src/resources/lua-types/quarto/utils.lua
+++ b/src/resources/lua-types/quarto/utils.lua
@@ -12,15 +12,60 @@ Note that you should use `quarto.log.output()` instead of this function.
 function quarto.utils.dump(value) end
 
 --[[
-Compute the absolute path to a file that is installed alongside the Lua script. 
+Extended type function that returns Pandoc types with Quarto custom node awareness.
 
-This is useful for internal resources that your filter needs but should 
+Returns `"CustomBlock"` for Quarto custom block nodes and `"CustomInline"` for
+custom inline nodes, otherwise delegates to `pandoc.utils.type()`.
+]]
+---@param value any Value to check
+---@return string
+function quarto.utils.type(value) end
+
+quarto.utils.table = {}
+
+--[[
+Return `true` if the table is a plain integer-indexed array.
+]]
+---@param t table Table to check
+---@return boolean
+function quarto.utils.table.isarray(t) end
+
+--[[
+Return `true` if the array-like table contains the given value.
+]]
+---@param t table Array-like table to search
+---@param value any Value to find
+---@return boolean
+function quarto.utils.table.contains(t, value) end
+
+--[[
+Iterator that traverses table keys in sorted order.
+]]
+---@param t table Table to iterate
+---@param f? function Optional comparison function for sorting
+---@return function Iterator function
+function quarto.utils.table.sortedPairs(t, f) end
+
+--[[
+Compute the absolute path to a file that is installed alongside the Lua script.
+
+This is useful for internal resources that your filter needs but should
 not be visible to the user.
 ]]
 ---@param path string Path of file relative to the Lua script
 ---@return string
 function quarto.utils.resolve_path(path) end
 
+--[[
+Resolve a file path relative to the document's working directory.
+
+Unlike `resolve_path()` which resolves relative to the Lua script,
+this resolves relative to the document being rendered.
+]]
+---@param path string File path to resolve
+---@return string
+function quarto.utils.resolve_path_relative_to_document(path) end
+
 --[[
 Converts a string to a list of Pandoc Inlines, processing any Quarto custom
 syntax in the string.
@@ -38,6 +83,78 @@ syntax in the string.
 ---@return pandoc.Blocks
 function quarto.utils.string_to_blocks(path) end
 
+--[[
+Coerce the given object into a `pandoc.Inlines` list.
+
+Handles Inline, Inlines, Block, Blocks, List, and table inputs.
+More performant than `pandoc.Inlines()` as it avoids full marshal roundtrips.
+
+Note: The input object may be modified destructively.
+]]
+---@param obj any Object to coerce
+---@return pandoc.Inlines
+function quarto.utils.as_inlines(obj) end
+
+--[[
+Coerce the given object into a `pandoc.Blocks` list.
+
+Handles Block, Blocks, Inline, Inlines, List, Caption, and table inputs.
+More performant than `pandoc.Blocks()` as it avoids full marshal roundtrips.
+
+Note: The input object may be modified destructively.
+]]
+---@param obj any Object to coerce
+---@return pandoc.Blocks
+function quarto.utils.as_blocks(obj) end
+
+--[[
+Return `true` if the given AST node is empty.
+
+A node is considered empty if it's an empty list/table, has empty `content`,
+has empty `caption`, or has an empty `text` field.
+]]
+---@param node any AST node to check
+---@return boolean
+function quarto.utils.is_empty_node(node) end
+
+--[[
+Walk and render extended/custom AST nodes.
+
+Processes Quarto custom AST nodes (like Callout, Tabset, etc.) into their
+final Pandoc representation.
+]]
+---@param node pandoc.Node AST node to render
+---@return pandoc.Node
+function quarto.utils.render(node) end
+
+--[[
+CSS-selector-like AST matcher for Pandoc nodes.
+
+Accepts string path selectors separated by `/` with support for:
+- Element type selectors (e.g. `"Header"`, `"Para"`, `"Div"`)
+- Child traversal via `/` separator
+- `*` wildcard to match any child
+- `{Type}` capture syntax to return matched nodes
+- `:child` to search direct children
+- `:descendant` to search all descendants
+- `:nth-child(n)` to match a specific child index
+
+Returns a function that, when called with an AST node, returns the matched
+node(s) or `false`/`nil` if no match.
+]]
+---@param ... string|function Selector path components
+---@return function Matcher function
+function quarto.utils.match(...) end
+
+--[[
+Append a Block, Blocks, or Inlines value to an existing Blocks list.
+
+Inlines are wrapped in a Plain block before appending.
+]]
+---@param blocks pandoc.Blocks Target Blocks list
+---@param block pandoc.Block|pandoc.Blocks|pandoc.Inlines Value to append
+function quarto.utils.add_to_blocks(blocks, block) end
+
 --[[
 Returns a filter that parses book metadata markers during document traversal.