diff --git a/Cargo.lock b/Cargo.lock
index c6be5de..1e3034e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -554,29 +554,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "env_filter"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32e90c2accc4b07a8456ea0debdc2e7587bdd890680d71173a15d4ae604f6eef"
-dependencies = [
- "log",
- "regex",
-]
-
-[[package]]
-name = "env_logger"
-version = "0.11.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0621c04f2196ac3f488dd583365b9c09be011a4ab8b9f37248ffcc8f6198b56a"
-dependencies = [
- "anstream",
- "anstyle",
- "env_filter",
- "jiff",
- "log",
-]
-
 [[package]]
 name = "equivalent"
 version = "1.0.2"
@@ -1173,25 +1150,6 @@ version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09e54e57b4c48b40f7aec75635392b12b3421fa26fe8b4332e63138ed278459c"
 
-[[package]]
-name = "include_dir"
-version = "0.7.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "923d117408f1e49d914f1a379a309cffe4f18c05cf4e3d12e613a15fc81bd0dd"
-dependencies = [
- "include_dir_macros",
-]
-
-[[package]]
-name = "include_dir_macros"
-version = "0.7.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7cab85a7ed0bd5f0e76d93846e0147172bed2e2d3f859bcc33a8d9699cad1a75"
-dependencies = [
- "proc-macro2",
- "quote",
-]
-
 [[package]]
 name = "indexmap"
 version = "2.14.0"
@@ -1222,30 +1180,6 @@ version = "1.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4a5f13b858c8d314ee3e8f639011f7ccefe71f97f96e50151fb991f267928e2c"
 
-[[package]]
-name = "jiff"
-version = "0.2.24"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f00b5dbd620d61dfdcb6007c9c1f6054ebd75319f163d886a9055cec1155073d"
-dependencies = [
- "jiff-static",
- "log",
- "portable-atomic",
- "portable-atomic-util",
- "serde_core",
-]
-
-[[package]]
-name = "jiff-static"
-version = "0.2.24"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e000de030ff8022ea1da3f466fbb0f3a809f5e51ed31f6dd931c35181ad8e6d7"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "js-sys"
 version = "0.3.77"
@@ -1407,9 +1341,9 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.29"
+version = "0.4.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
+checksum = "13dc2df351e3202783a1fe0d44375f7295ffb4049267b0f3018346dc122a1d94"
 
 [[package]]
 name = "memchr"
@@ -1656,15 +1590,6 @@ version = "1.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f84267b20a16ea918e43c6a88433c2d54fa145c92a811b5b047ccbe153674483"
 
-[[package]]
-name = "portable-atomic-util"
-version = "0.2.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c2a106d1259c23fac8e543272398ae0e3c0b8d33c88ed73d0cc71b0f1d902618"
-dependencies = [
- "portable-atomic",
-]
-
 [[package]]
 name = "postcard"
 version = "1.1.1"
@@ -1848,9 +1773,9 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.12.3"
+version = "1.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e10754a14b9137dd7b1e3e5b0493cc9171fdd105e0ab477f51b72e7f3ac0e276"
+checksum = "b544ef1b4eac5dc2db33ea63606ae9ffcfac26c1416a2806ae0bf5f56b201191"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -1860,9 +1785,9 @@ dependencies = [
 
 [[package]]
 name = "regex-automata"
-version = "0.4.14"
+version = "0.4.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e1dd4122fc1595e8162618945476892eefca7b88c52820e74af6262213cae8f"
+checksum = "809e8dc61f6de73b46c85f4c96486310fe304c434cfa43669d7b40f711150908"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -2413,9 +2338,6 @@ name = "typssg"
 version = "0.1.0"
 dependencies = [
  "clap",
- "env_logger",
- "include_dir",
- "log",
  "typst",
  "typst-as-lib",
  "typst-html",
diff --git a/Cargo.toml b/Cargo.toml
index 28eeeb5..fd7f150 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,10 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-include_dir = "0.7.4"
 clap = { version = "4.6.1", features = ["derive"] }
-env_logger = "0.11.10"
-log = "0.4.29"
 typst = "0.14.2"
 typst-as-lib = { version = "0.15.4", features = ["typst-html", "typst-kit-fonts", "typst-kit-embed-fonts"] }
 typst-html = "0.14.2"
diff --git a/build.rs b/build.rs
deleted file mode 100644
index e5458ff..0000000
--- a/build.rs
+++ /dev/null
@@ -1,3 +0,0 @@
-fn main() {
-    println!("cargo:rerun-if-changed=prepends/");
-}
diff --git a/common.typ b/common.typ
new file mode 100644
index 0000000..eabfd0a
--- /dev/null
+++ b/common.typ
@@ -0,0 +1,8 @@
+#let image(source, width: "400px") = {
+  html.elem("img", attrs: (
+    src: "/static/articles/" + source,
+    alt: source,
+    width: str(width),
+  ))
+}
+
diff --git a/prepends/bibliography.typ b/prepends/bibliography.typ
deleted file mode 100644
index f72b036..0000000
--- a/prepends/bibliography.typ
+++ /dev/null
@@ -1,17 +0,0 @@
-// By default, bibliography titles render with a level 1 heading.  Typssg
-// rather assumes that lvl 1 headings are just for page titles, and that
-// section titles are denoted with lvl 2 headings.
-#let _bibliography = bibliography
-#let refs(content) = {
-  heading(level: 2, "References")
-  _bibliography(bytes(content.text), style: "ieee", title: none)
-}
-
-// Override default bibliography so that users don't accidentally use it
-#let bibliography = (path, ..args) => {
-  text[This project has enabled the bibliography extension which provides the `#refs()` funciton for convenient in-file bibliographies.  If you _did_ intend to use the default bibliography function, call it instead with `#_bibliography().`]
-}
-
-// Have in-text citations appear as just numbers, instead of the IEEE default
-// style of [#] with brackets.
-#set cite(style: "vancouver-superscript")
diff --git a/prepends/card.typ b/prepends/card.typ
deleted file mode 100644
index 25cc3e0..0000000
--- a/prepends/card.typ
+++ /dev/null
@@ -1,22 +0,0 @@
-#let card(
-  caption: "",
-  media: (),
-  score: 0,
-  defense: "",
-  offense: "",
-) = {
-  text[= #caption (Card)
-
-  #html.elem("div", attrs: (class: "card"))[
-    #media.at(0)
-  ]
-
-  score: #score
-
-  == Defense
-  #defense
-
-  == Offense
-  #offense
-  ]
-}
diff --git a/prepends/figure.typ b/prepends/figure.typ
deleted file mode 100644
index 73ec4c8..0000000
--- a/prepends/figure.typ
+++ /dev/null
@@ -1,19 +0,0 @@
-// Given a figure with an image, this show rule will wrap the image in a link
-// that goes to the full version of the pic.  For example, image("bird.jpg")
-// will get wrapped in a #link("bird_full.jpg").  This, of course, assumes
-// bird_full.jpg also exists in the directory.
-#show figure: it => {
-  if it.body.func() == image {
-    let src = it.body.source
-    let dot-pos = src.rev().position(".")
-    let full-src = if dot-pos != none {
-      src.slice(0, src.len() - dot-pos - 1) + "_full" + src.slice(src.len() - dot-pos - 1)
-    } else {
-      src + "_full"
-    }
-    show image: img => link(full-src, img)
-    it
-  } else {
-    it
-  }
-}
diff --git a/prepends/link.typ b/prepends/link.typ
deleted file mode 100644
index ad107f9..0000000
--- a/prepends/link.typ
+++ /dev/null
@@ -1,15 +0,0 @@
-// Adds an "internal" class to links that stay within the application,
-// allowing them to be styled differently from external links.
-#show link: it => {
-  let dest = it.dest
-  if type(dest) == str {
-    let is-internal = dest.starts-with("/") or dest.starts-with(".")
-    let attrs = (href: dest)
-    if is-internal {
-      attrs = (href: dest, class: "internal")
-    }
-    html.elem("a", attrs: attrs, it.body)
-  } else {
-    it
-  }
-}
diff --git a/prepends/quote.typ b/prepends/quote.typ
deleted file mode 100644
index bba122d..0000000
--- a/prepends/quote.typ
+++ /dev/null
@@ -1,15 +0,0 @@
-// Typst version 14.0.2 outputs a block quote as a <blockquote> followed by
-// a <p> for the attribution.  This makes it difficult to target the
-// attribution for styling.  This snippet instead uses a <blockquote> and
-// a <figcaption> wrapped in a <figure> block.
-#show quote.where(block: true): it => {
-  let inner = html.elem("blockquote", it.body)
-  if it.attribution != none {
-    html.elem("figure", {
-      inner
-      html.elem("figcaption", it.attribution)
-    })
-  } else {
-    inner
-  }
-}
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
deleted file mode 100644
index 9cab269..0000000
--- a/rust-toolchain.toml
+++ /dev/null
@@ -1,3 +0,0 @@
-[toolchain]
-channel = "stable"
-
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..afd09a7
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,10 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+pkgs.mkShell {
+  buildInputs = with pkgs; [
+    cargo
+    rustc
+    rust-analyzer
+  ];
+}
+
diff --git a/src/lib.rs b/src/lib.rs
index 34bc866..a03e23d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,87 +1,21 @@
-mod plugin;
-
-use std::fmt::Write;
 use std::fs;
 use std::path::PathBuf;
 
-pub use plugin::{concat_plugin_sources, embedded_prepend_source, list_embedded_plugin_ids};
-
 use typst::ecow::EcoString;
-use typst::syntax::Source;
-use typst_as_lib::{typst_kit_options::TypstKitFontOptions, TypstAsLibError, TypstEngine};
+use typst_as_lib::{typst_kit_options::TypstKitFontOptions, TypstEngine};
 use typst_html::{HtmlAttr, HtmlDocument, HtmlElement, HtmlNode};
-use log::info;
-
-fn format_typst_compile_error(
-    err: TypstAsLibError,
-    full_source: &str,
-    index_byte_start: usize,
-    index_source: &str,
-) -> std::io::Error {
-    let report = match err {
-        TypstAsLibError::TypstSource(diagnostics) if !diagnostics.is_empty() => {
-            let combined = Source::detached(full_source);
-            let index_only = Source::detached(index_source);
-            let index_end = index_byte_start.saturating_add(index_source.len());
-            let mut out = String::from("Typst compile failed:\n");
-            for d in diagnostics.iter() {
-                let msg = d.message.as_str();
-                if let Some(range) = combined.range(d.span) {
-                    let byte = range.start;
-                    if byte >= index_byte_start && byte < index_end {
-                        let rel = byte - index_byte_start;
-                        if let Some((line, col)) = index_only.lines().byte_to_line_column(rel) {
-                            let _ = writeln!(
-                                &mut out,
-                                "  index.typ:{}:{}: {}",
-                                line + 1,
-                                col + 1,
-                                msg
-                            );
-                        } else {
-                            let _ = writeln!(&mut out, "  {msg}");
-                        }
-                    } else if let Some((line, col)) = combined.lines().byte_to_line_column(byte) {
-                        let _ = writeln!(
-                            &mut out,
-                            "  (preamble) line {}:{}: {}",
-                            line + 1,
-                            col + 1,
-                            msg
-                        );
-                    } else {
-                        let _ = writeln!(&mut out, "  {msg}");
-                    }
-                } else {
-                    let _ = writeln!(&mut out, "  {msg}");
-                }
-                for hint in d.hints.iter() {
-                    let _ = writeln!(&mut out, "    hint: {}", hint.as_str());
-                }
-            }
-            out
-        }
-        other => format!("typst compile failed: {other}"),
-    };
-    std::io::Error::new(std::io::ErrorKind::Other, report)
-}
 
 
 pub fn compile_article(
     article_dir: &PathBuf,
     prepend: &Option<PathBuf>,
-    plugins: &[impl AsRef<str>],
-    include_title: bool,
 ) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
-    info!("compiling {} ...", article_dir.display());
 
     let template_file = article_dir.join("index.typ");
     let output = article_dir.join("index.html");
     let outline_file = article_dir.join("outline.html");
 
-    let plugin_block = concat_plugin_sources(plugins)?;
-
-    let user_prepend = if let Some(prepend_file) = prepend {
+    let prepend_content = if let Some(prepend_file) = prepend {
         fs::read_to_string(&prepend_file).map_err(|e| {
             format!(
                 "could not read prepend file {}: {e}",
@@ -92,26 +26,19 @@ pub fn compile_article(
         fs::read_to_string(article_dir.join("prepend.typ")).unwrap_or_default()
     };
 
-    let index_source = fs::read_to_string(&template_file).map_err(|e| {
-        format!(
-            "could not read template {}: {e}",
-            template_file.display()
-        )
-    })?;
-
     let mut template: EcoString = EcoString::new();
-    template.push_str(&plugin_block);
-    if !plugin_block.is_empty() && !user_prepend.is_empty() {
-        template.push('\n');
-    }
-    template.push_str(&user_prepend);
-    let index_byte_start = template.len();
-    template.push_str(&index_source);
-
-    let full_source_str = template.to_string();
+    template.push_str(&prepend_content);
+    template.push_str(
+        &fs::read_to_string(&template_file).map_err(|e| {
+            format!(
+                "could not read template {}: {e}",
+                template_file.display()
+            )
+        })?,
+    );
 
     let engine = TypstEngine::builder()
-        .main_file(full_source_str.clone())
+        .main_file(template.to_string())
         .search_fonts_with(
             TypstKitFontOptions::default()
                 .include_system_fonts(false)
@@ -123,27 +50,13 @@ pub fn compile_article(
     let mut doc: HtmlDocument = engine
         .compile()
         .output
-        .map_err(|e| format_typst_compile_error(e, &full_source_str, index_byte_start, &index_source))?;
+        .map_err(|e| format!("typst compile failed: {e}"))?;
 
     let mut outline = EcoString::new();
-    let mut curr_level = 1u32;
-    let mut ul_depth = 0u32;
-    let mut title_h2_pending = !include_title;
-    let mut first_outline_heading = true;
-    parse_outline(
-        &mut doc.root,
-        &mut outline,
-        &mut curr_level,
-        &mut ul_depth,
-        include_title,
-        &mut title_h2_pending,
-        &mut first_outline_heading,
-    );
-    // `ul_depth` counts open `<ul>` tags; it can diverge from `curr_level - 1` when the first
-    // outline heading uses lazy depth (skip title). Always drain by `ul_depth`, not `curr_level`.
-    while ul_depth > 0 {
-        ul_depth -= 1;
-        outline.push_str("  ".repeat(ul_depth as usize).as_str());
+    let mut curr_level = 1;
+    parse_outline(&mut doc.root, &mut outline, &mut curr_level);
+    for i in (1..curr_level).rev() {
+        outline.push_str("  ".repeat(i as usize - 1).as_str());
         outline.push_str("</ul>\n");
     }
     fs::write(&outline_file, outline.as_bytes()).map_err(|e| {
@@ -193,51 +106,11 @@ pub fn compile_article(
     Ok(())
 }
 
-fn heading_level_from_tag(tag: &str) -> Option<u32> {
-    match tag {
-        "<h2>" => Some(2),
-        "<h3>" => Some(3),
-        "<h4>" => Some(4),
-        "<h5>" => Some(5),
-        "<h6>" => Some(6),
-        _ => None,
-    }
-}
-
-fn parse_outline(
-    elem: &mut HtmlElement,
-    outline: &mut EcoString,
-    curr_level: &mut u32,
-    ul_depth: &mut u32,
-    include_title: bool,
-    title_h2_pending: &mut bool,
-    first_outline_heading: &mut bool,
-) {
-    let tag = elem.tag.to_string();
-    let tag_ref = tag.as_str();
-
-    if let Some(level) = heading_level_from_tag(tag_ref) {
-        if !include_title && *title_h2_pending {
-            *title_h2_pending = false;
-            if tag_ref == "<h2>" {
-                for child in elem.children.make_mut().iter_mut() {
-                    if let HtmlNode::Element(e) = child {
-                        parse_outline(
-                            e,
-                            outline,
-                            curr_level,
-                            ul_depth,
-                            include_title,
-                            title_h2_pending,
-                            first_outline_heading,
-                        );
-                    }
-                }
-                return;
-            }
-        }
-        *title_h2_pending = false;
-
+fn parse_outline(elem: &mut HtmlElement, outline: &mut EcoString, curr_level: &mut u32) {
+    if matches!(
+        elem.tag.to_string().as_str(),
+        "<h2>" | "<h3>" | "<h4>" | "<h5>" | "<h6>"
+    ) {
         let mut header_text = EcoString::new();
 
         for child in &elem.children {
@@ -263,26 +136,21 @@ fn parse_outline(
             .trim_matches('-')
             .replace("--", "-");
 
-        if *first_outline_heading {
-            *first_outline_heading = false;
-            *curr_level = level.saturating_sub(1);
-        }
+        let level: u32 = elem.tag.to_string().chars().nth(2).unwrap() as u32 - '0' as u32;
 
         while level > *curr_level {
-            outline.push_str("  ".repeat(*ul_depth as usize).as_str());
-            outline.push_str("<ul>\n");
-            *ul_depth += 1;
             *curr_level += 1;
+            outline.push_str("  ".repeat(*curr_level as usize - 2).as_str());
+            outline.push_str("<ul>\n");
         }
-        while level < *curr_level && *ul_depth > 0 {
-            *curr_level -= 1;
-            *ul_depth -= 1;
-            outline.push_str("  ".repeat(*ul_depth as usize).as_str());
+        while level < *curr_level {
+            outline.push_str("  ".repeat(*curr_level as usize - 2).as_str());
             outline.push_str("</ul>\n");
+            *curr_level -= 1;
         }
         *curr_level = level;
 
-        outline.push_str("  ".repeat(*ul_depth as usize).as_str());
+        outline.push_str("  ".repeat(*curr_level as usize - 1).as_str());
         outline.push_str(
             format!(
                 "<li><a href=\"#{}\">{}</a></li>\n",
@@ -297,39 +165,8 @@ fn parse_outline(
 
     for child in elem.children.make_mut().iter_mut() {
         match child {
-            HtmlNode::Element(e) => {
-                parse_outline(
-                    e,
-                    outline,
-                    curr_level,
-                    ul_depth,
-                    include_title,
-                    title_h2_pending,
-                    first_outline_heading,
-                );
-            }
+            HtmlNode::Element(e) => parse_outline(e, outline, curr_level),
             _ => {}
         }
     }
 }
-
-pub fn compile_all(
-    root_dir: &PathBuf,
-    prepend: &Option<PathBuf>,
-    plugins: &[impl AsRef<str>],
-    include_title_in_outline: bool,
-) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
-    for entry in fs::read_dir(root_dir)? {
-        let entry = entry?;
-        let path = entry.path();
-
-        if path.is_dir() {
-            compile_all(&path, prepend, plugins, include_title_in_outline)?;
-        } else if path.file_name().is_some_and(|n| n == "index.typ") {
-            let dir = path.parent().unwrap().to_path_buf();
-            compile_article(&dir, prepend, plugins, include_title_in_outline)?;
-        }
-    }
-
-    Ok(())
-}
diff --git a/src/main.rs b/src/main.rs
index ba7c1a5..b836b3f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,8 +2,7 @@ use std::env;
 use std::path::PathBuf;
 
 use clap::Parser;
-use typssg::{compile_all, compile_article};
-use log::{info, error};
+use typssg::compile_article;
 
 #[derive(Parser)]
 struct Args {
@@ -12,45 +11,18 @@ struct Args {
 
     #[arg(long)]
     prepend: Option<PathBuf>,
-
-    #[arg(long, value_delimiter = ',')]
-    plugin: Vec<String>,
-
-    #[arg(short)]
-    recursive: bool,
-
-    #[arg(long)]
-    include_title_in_outline: bool,
 }
 
 fn main() {
-    env_logger::init();
-
     match env::current_dir() {
-        Ok(path) => info!("Starting in working directory: {}", path.display()),
-        Err(e) => error!("Error getting current directory: {}", e),
+        Ok(path) => println!("Current working directory: {}", path.display()),
+        Err(e) => eprintln!("Error getting current directory: {}", e),
     }
 
     let args = Args::parse();
 
-    let result = if args.recursive {
-        compile_all(
-            &args.dir,
-            &args.prepend,
-            &args.plugin,
-            args.include_title_in_outline,
-        )
-    } else {
-        compile_article(
-            &args.dir,
-            &args.prepend,
-            &args.plugin,
-            args.include_title_in_outline,
-        )
-    };
-
-    if let Err(e) = result {
-        error!("{e}");
+    if let Err(e) = compile_article(&args.dir, &args.prepend) {
+        eprintln!("{e}");
         std::process::exit(1);
     }
 }
diff --git a/src/plugin.rs b/src/plugin.rs
deleted file mode 100644
index 3f17a7d..0000000
--- a/src/plugin.rs
+++ /dev/null
@@ -1,65 +0,0 @@
-use std::collections::HashMap;
-use std::sync::OnceLock;
-
-use include_dir::{include_dir, Dir};
-
-static PREPENDS_DIR: Dir<'static> = include_dir!("prepends");
-
-fn prepends_table() -> &'static HashMap<String, String> {
-    static TABLE: OnceLock<HashMap<String, String>> = OnceLock::new();
-    TABLE.get_or_init(|| {
-        let mut m = HashMap::new();
-        for file in PREPENDS_DIR.files() {
-            let Some(path_str) = file.path().to_str() else {
-                continue;
-            };
-            if !path_str.ends_with(".typ") {
-                continue;
-            }
-            let id = path_str[..path_str.len() - 4].replace('\\', "/");
-            let text = file
-                .contents_utf8()
-                .unwrap_or_else(|| panic!("prepends/{path_str} is not valid UTF-8"))
-                .to_string();
-            if m.insert(id.clone(), text).is_some() {
-                panic!("duplicate prepend plugin id after normalize: {id}");
-            }
-        }
-        m
-    })
-}
-
-pub fn list_embedded_plugin_ids() -> Vec<String> {
-    let mut v: Vec<String> = prepends_table().keys().cloned().collect();
-    v.sort();
-    v
-}
-
-pub fn embedded_prepend_source(id: &str) -> Result<String, String> {
-    let id = id.trim().replace('\\', "/");
-    if id.is_empty() {
-        return Err("empty plugin id".into());
-    }
-    prepends_table()
-        .get(&id)
-        .cloned()
-        .ok_or_else(|| {
-            let known = list_embedded_plugin_ids().join(", ");
-            if known.is_empty() {
-                format!("unknown plugin '{id}' (no embedded prepends in this build)")
-            } else {
-                format!("unknown plugin '{id}' (embedded: {known})")
-            }
-        })
-}
-
-pub fn concat_plugin_sources(plugin_ids: &[impl AsRef<str>]) -> Result<String, String> {
-    let mut out = String::new();
-    for (i, id) in plugin_ids.iter().enumerate() {
-        if i > 0 {
-            out.push('\n');
-        }
-        out.push_str(&embedded_prepend_source(id.as_ref())?);
-    }
-    Ok(out)
-}