docs: add npm badge

* fix(markdown): handle wrapped bold abstracts

* chore: bump napi package version

Cargo.toml

@@ -17,7 +17,7 @@ crate-type = ["lib", "cdylib"]
 pyo3 = { version = "0.25", features = ["extension-module"], optional = true }
 
 # PDF parsing
-lopdf = { git = "https://github.com/J-F-Liu/lopdf", rev = "7a05512d831415b1f2b1ce522391d6beab8a1284", features = ["rayon"] }
+lopdf = { version = "0.41.0", features = ["rayon"] }
 
 # Error handling
 thiserror = "2.0"

README.md

@@ -1,5 +1,8 @@
 # pdf-inspector
 
+[![Crates.io](https://img.shields.io/crates/v/pdf-inspector.svg)](https://crates.io/crates/pdf-inspector)
+[![npm](https://img.shields.io/npm/v/@firecrawl/pdf-inspector.svg)](https://www.npmjs.com/package/@firecrawl/pdf-inspector)
+
 Fast Rust library for PDF classification and text extraction. Detects whether a PDF is text-based or scanned, extracts text with position awareness, and converts to clean Markdown — all without OCR. Includes bindings for [Python](docs/python.md) and [Node.js](napi/README.md).
 
 Built by [Firecrawl](https://firecrawl.dev) to handle text-based PDFs locally in under 200ms, skipping expensive OCR services for the ~54% of PDFs that don't need them.
@@ -71,9 +74,17 @@ console.log(result.markdown);  // Markdown string or null
 
 ### Rust
 
+Install from [crates.io](https://crates.io/crates/pdf-inspector):
+
+```bash
+cargo add pdf-inspector
+```
+
+Or add it manually:
+
 ```toml
 [dependencies]
-pdf-inspector = { git = "https://github.com/firecrawl/pdf-inspector" }
+pdf-inspector = "0.1"
 ```
 
 ```rust
@@ -91,29 +102,34 @@ if let Some(markdown) = &result.markdown {
 ### CLI
 
 ```bash
+# Install the CLI tools
+cargo install pdf-inspector
+
 # Convert PDF to Markdown
-cargo run --bin pdf2md -- document.pdf
+pdf2md document.pdf
 
 # JSON output (for piping)
-cargo run --bin pdf2md -- document.pdf --json
+pdf2md document.pdf --json
 
 # Raw markdown only (no headers)
-cargo run --bin pdf2md -- document.pdf --raw
+pdf2md document.pdf --raw
 
 # Insert page break markers (<!-- Page N -->)
-cargo run --bin pdf2md -- document.pdf --pages
+pdf2md document.pdf --pages
 
 # Process only specific pages
-cargo run --bin pdf2md -- document.pdf --select-pages 1,3,5-10
+pdf2md document.pdf --select-pages 1,3,5-10
 
 # Detection only (no extraction)
-cargo run --bin detect-pdf -- document.pdf
-cargo run --bin detect-pdf -- document.pdf --json
+detect-pdf document.pdf
+detect-pdf document.pdf --json
 
 # Detection + layout analysis (tables, columns)
-cargo run --bin detect-pdf -- document.pdf --analyze --json
+detect-pdf document.pdf --analyze --json
 ```
 
+From a source checkout, use `cargo run --bin pdf2md -- document.pdf` or `cargo run --bin detect-pdf -- document.pdf` instead.
+
 ## Architecture
 
 ```

napi/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@firecrawl/pdf-inspector",
-  "version": "1.9.2",
+  "version": "1.9.5",
   "description": "Fast PDF classification and text extraction. Detect text-based vs scanned PDFs, extract text by region with quality checks. Native Rust performance via napi-rs.",
   "main": "index.js",
   "types": "index.d.ts",

src/extractor/fonts.rs

@@ -858,6 +858,13 @@ pub(crate) fn extract_text_from_operand(
             // unmapped. Don't fall through to text-interpretation fallbacks
             // (Latin-1, UTF-16, etc.) which would misinterpret CID bytes as
             // character codes (e.g. CID 0x01A9 → Latin-1 "©").
+            if is_type0_cid_font && bytes.iter().any(|&b| b > 0x7F) {
+                // 2-byte CIDs (Identity-H) are by far the common case; for
+                // an odd byte count we still emit at least one marker so
+                // detection downstream fires.
+                let cid_count = (bytes.len() / 2).max(1);
+                return Some("\u{FFFD}".repeat(cid_count));
+            }
 
             // Try our custom encoding map from Differences arrays.
             // The Differences array overrides specific codes in a base encoding (typically
@@ -966,27 +973,6 @@ pub(crate) fn extract_text_from_operand(
                 return Some(symbol_text);
             }
 
-            // Latin-1 fallback. Safe ONLY for fonts that use single-byte
-            // encodings — for these, an unmapped byte is a valid character
-            // code in Latin-1/WinAnsi space. CID fonts (Type0 / Identity-H)
-            // emit multi-byte CIDs that aren't characters; per-byte Latin-1
-            // produces mojibake (e.g. 2-byte CID 0xCDD9 → "ÍÙ" for the
-            // production scrape_id 019de78c-... samples).
-            //
-            // For a CID font (has_cmap is set OR a /ToUnicode reference
-            // exists) with any non-ASCII bytes, emit a single U+FFFD per
-            // CID instead. This both replaces the mojibake with a proper
-            // "decode failed" marker AND keeps `detect_encoding_issues`
-            // tripping so the page is flagged for OCR — the existing
-            // garbage-detection path that the high-Latin-1 mojibake used
-            // to satisfy by accident.
-            if is_type0_cid_font && bytes.iter().any(|&b| b > 0x7F) {
-                // 2-byte CIDs (Identity-H) are by far the common case; for
-                // an odd byte count we still emit at least one marker so
-                // detection downstream fires.
-                let cid_count = (bytes.len() / 2).max(1);
-                return Some("\u{FFFD}".repeat(cid_count));
-            }
             // Pure ASCII bytes round-trip safely (Latin-1 == ASCII for
             // 0x00..=0x7F), and non-CID (Type1 / TrueType / Type3) fonts
             // use single-byte encodings where Latin-1 fallback is the

src/lib.rs

@@ -823,7 +823,8 @@ pub fn extract_tables_in_regions_mem(
                     // symmetrically low under font-decode failure — this
                     // guard breaks that symmetry by comparing against
                     // bbox area, which is independent of extraction.
-                    if region_text_density_too_low(region_text_chars, region_area)
+                    if source != TableCandidateSource::KeyValue
+                        && region_text_density_too_low(region_text_chars, region_area)
                         && !markdown_table_body_is_dense(&md)
                     {
                         return None;
@@ -836,8 +837,10 @@ pub fn extract_tables_in_regions_mem(
                         Some(TableCandidateIssue::LineRowUndercount)
                     } else if wide_table_sparse_prefix_undercount(&md) {
                         Some(TableCandidateIssue::SparseWideUndercount)
-                    } else if source != TableCandidateSource::Line
-                        && text_cluster_column_undercount(&matched, shape)
+                    } else if !matches!(
+                        source,
+                        TableCandidateSource::Line | TableCandidateSource::KeyValue
+                    ) && text_cluster_column_undercount(&matched, shape)
                     {
                         Some(TableCandidateIssue::TextColumnUndercount)
                     } else if prose_grid_fragment_needs_ocr(&md) {
@@ -886,6 +889,11 @@ pub fn extract_tables_in_regions_mem(
                     candidates.push(candidate);
                 }
             }
+            if let Some(table) = tables::try_build_key_value_table_from_rows(&matched, page_1idx) {
+                if let Some(candidate) = evaluate(TableCandidateSource::KeyValue, &table) {
+                    candidates.push(candidate);
+                }
+            }
 
             match select_table_candidate(&candidates) {
                 Some(candidate) => page_results.push(RegionText {
@@ -3758,6 +3766,7 @@ enum TableCandidateSource {
     Line,
     Heuristic,
     Column,
+    KeyValue,
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
@@ -3794,7 +3803,9 @@ fn select_table_candidate(candidates: &[TableCandidate]) -> Option<&TableCandida
         return candidates.iter().find(|candidate| {
             matches!(
                 candidate.source,
-                TableCandidateSource::Heuristic | TableCandidateSource::Column
+                TableCandidateSource::Heuristic
+                    | TableCandidateSource::Column
+                    | TableCandidateSource::KeyValue
             ) && candidate.issue.is_none()
                 && candidate.shape.cols * 10 >= first.shape.cols * 13
         });
@@ -3815,7 +3826,9 @@ fn select_table_candidate(candidates: &[TableCandidate]) -> Option<&TableCandida
         if let Some(heuristic) = candidates.iter().find(|candidate| {
             matches!(
                 candidate.source,
-                TableCandidateSource::Heuristic | TableCandidateSource::Column
+                TableCandidateSource::Heuristic
+                    | TableCandidateSource::Column
+                    | TableCandidateSource::KeyValue
             ) && candidate.issue.is_none()
                 && heuristic_substantially_better(candidate.shape, accepted.shape)
         }) {
@@ -3824,13 +3837,15 @@ fn select_table_candidate(candidates: &[TableCandidate]) -> Option<&TableCandida
     }
 
     if accepted.source == TableCandidateSource::Heuristic {
-        if let Some(column) = candidates.iter().find(|candidate| {
-            candidate.source == TableCandidateSource::Column
-                && candidate.issue.is_none()
+        if let Some(layout_candidate) = candidates.iter().find(|candidate| {
+            matches!(
+                candidate.source,
+                TableCandidateSource::Column | TableCandidateSource::KeyValue
+            ) && candidate.issue.is_none()
                 && candidate.shape.cols >= accepted.shape.cols
                 && candidate.shape.rows > accepted.shape.rows
         }) {
-            accepted = column;
+            accepted = layout_candidate;
         }
     }
 

src/markdown/convert.rs

@@ -149,6 +149,79 @@ fn find_isolated_lines(lines: &[TextLine], base_size: f32, para_threshold: f32)
     set
 }
 
+/// Pre-scan body-size all-bold runs that are too long to be headings.
+///
+/// Some academic PDFs use an all-bold abstract/summary paragraph immediately
+/// after the author block.  A line-local bold heading heuristic sees each
+/// wrapped visual line as "standalone" once the first line is misclassified,
+/// producing a stack of `##` headings.  Multi-line body-size bold runs with a
+/// paragraph-sized word count should stay paragraph text.
+fn find_wrapped_bold_paragraph_lines(
+    lines: &[TextLine],
+    base_size: f32,
+    para_threshold: f32,
+) -> HashSet<usize> {
+    let mut set = HashSet::new();
+    let mut i = 0usize;
+
+    while i < lines.len() {
+        if !is_body_size_all_bold_line(&lines[i], base_size) {
+            i += 1;
+            continue;
+        }
+
+        let start = i;
+        let mut end = i;
+        let mut word_count = lines[i].text().split_whitespace().count();
+
+        while end + 1 < lines.len()
+            && is_body_size_all_bold_line(&lines[end + 1], base_size)
+            && is_wrapped_same_style_line(&lines[end], &lines[end + 1], para_threshold)
+        {
+            end += 1;
+            word_count += lines[end].text().split_whitespace().count();
+        }
+
+        let line_count = end - start + 1;
+        if line_count >= 3 && word_count > 20 {
+            for idx in start..=end {
+                set.insert(idx);
+            }
+        }
+
+        i = end + 1;
+    }
+
+    set
+}
+
+fn is_body_size_all_bold_line(line: &TextLine, base_size: f32) -> bool {
+    let Some(first) = line.items.first() else {
+        return false;
+    };
+    first.font_size >= base_size * 0.95
+        && first.font_size < base_size * 1.2
+        && line
+            .items
+            .iter()
+            .all(|item| item.is_bold && (item.font_size - first.font_size).abs() < 0.5)
+}
+
+fn is_wrapped_same_style_line(prev: &TextLine, next: &TextLine, para_threshold: f32) -> bool {
+    if prev.page != next.page {
+        return false;
+    }
+
+    let y_gap = prev.y - next.y;
+    if !(y_gap > 0.0 && y_gap <= para_threshold) {
+        return false;
+    }
+
+    let prev_x = prev.items.first().map(|item| item.x).unwrap_or(0.0);
+    let next_x = next.items.first().map(|item| item.x).unwrap_or(0.0);
+    (prev_x - next_x).abs() <= 40.0
+}
+
 /// Resolve the dominant structure role for a text line by looking up its items' MCIDs.
 ///
 /// Returns the first non-container role found (skipping Document/Part/Sect/Div/NonStruct/Span).
@@ -397,6 +470,8 @@ pub(super) fn to_markdown_from_lines_with_tables_and_images(
     // between paragraphs at body font size. Inspired by opendataloader's
     // lookahead in HeadingProcessor (prevNode/nextNode context).
     let isolated_lines = find_isolated_lines(&lines, base_size, para_threshold);
+    let wrapped_bold_paragraph_lines =
+        find_wrapped_bold_paragraph_lines(&lines, base_size, para_threshold);
 
     // Detect struct heading levels that are overused (body text mistagged as headings)
     let overused_heading_levels = detect_overused_struct_heading_levels(&lines, struct_roles);
@@ -410,6 +485,7 @@ pub(super) fn to_markdown_from_lines_with_tables_and_images(
     let mut last_list_x: Option<f32> = None;
     let mut in_code_block = false;
     let mut prev_had_dot_leaders = false;
+    let mut paragraph_in_wrapped_bold_run = false;
     let mut inserted_tables: HashSet<(u32, usize)> = HashSet::new();
     let mut inserted_images: HashSet<(u32, usize)> = HashSet::new();
 
@@ -475,6 +551,7 @@ pub(super) fn to_markdown_from_lines_with_tables_and_images(
             current_page = line.page;
             prev_y = f32::MAX;
             prev_x = 0.0;
+            paragraph_in_wrapped_bold_run = false;
 
             if options.include_page_numbers {
                 output.push_str(&format!("<!-- Page {} -->\n\n", current_page));
@@ -489,6 +566,7 @@ pub(super) fn to_markdown_from_lines_with_tables_and_images(
                     if in_paragraph {
                         output.push_str("\n\n");
                         in_paragraph = false;
+                        paragraph_in_wrapped_bold_run = false;
                     }
                     output.push('\n');
                     output.push_str(table_md);
@@ -506,6 +584,7 @@ pub(super) fn to_markdown_from_lines_with_tables_and_images(
                     if in_paragraph {
                         output.push_str("\n\n");
                         in_paragraph = false;
+                        paragraph_in_wrapped_bold_run = false;
                     }
                     output.push('\n');
                     output.push_str(image_md);
@@ -527,9 +606,18 @@ pub(super) fn to_markdown_from_lines_with_tables_and_images(
             && y_gap.abs() <= para_threshold
             && (prev_x - line_x).abs() > 50.0
             && prev_y < f32::MAX;
-        if (is_para_break || is_band_switch) && in_paragraph {
+        let line_all_bold = !line.items.is_empty() && line.items.iter().all(|item| item.is_bold);
+        let line_in_wrapped_bold_run = wrapped_bold_paragraph_lines.contains(&line_idx);
+        let is_bold_to_regular_break = in_paragraph
+            && paragraph_in_wrapped_bold_run
+            && !line_in_wrapped_bold_run
+            && !line_all_bold
+            && y_gap > base_size * 1.2
+            && y_gap <= para_threshold;
+        if (is_para_break || is_band_switch || is_bold_to_regular_break) && in_paragraph {
             output.push_str("\n\n");
             in_paragraph = false;
+            paragraph_in_wrapped_bold_run = false;
         }
         // Don't immediately end list on paragraph break
         // Let the continuation check below decide if we're still in a list
@@ -572,6 +660,7 @@ pub(super) fn to_markdown_from_lines_with_tables_and_images(
             if in_paragraph {
                 output.push_str("\n\n");
                 in_paragraph = false;
+                paragraph_in_wrapped_bold_run = false;
             }
             output.push_str(trimmed);
             output.push_str("\n\n");
@@ -625,6 +714,9 @@ pub(super) fn to_markdown_from_lines_with_tables_and_images(
                 if !(1..=15).contains(&word_count) {
                     return None;
                 }
+                if wrapped_bold_paragraph_lines.contains(&line_idx) {
+                    return None;
+                }
                 let rarity = font_size_rarity(line_font_size, &font_stats);
                 let all_bold = !line.items.is_empty() && line.items.iter().all(|i| i.is_bold);
                 let standalone = !in_paragraph;
@@ -656,6 +748,7 @@ pub(super) fn to_markdown_from_lines_with_tables_and_images(
             if in_paragraph {
                 output.push_str("\n\n");
                 in_paragraph = false;
+                paragraph_in_wrapped_bold_run = false;
             }
             let prefix = "#".repeat(level);
             // Use plain text for headers to avoid redundant formatting
@@ -678,6 +771,7 @@ pub(super) fn to_markdown_from_lines_with_tables_and_images(
             if in_paragraph {
                 output.push_str("\n\n");
                 in_paragraph = false;
+                paragraph_in_wrapped_bold_run = false;
             }
             output.push_str(&format!("- {}", trimmed));
             output.push('\n');
@@ -691,6 +785,7 @@ pub(super) fn to_markdown_from_lines_with_tables_and_images(
             if in_paragraph {
                 output.push_str("\n\n");
                 in_paragraph = false;
+                paragraph_in_wrapped_bold_run = false;
             }
             let formatted = format_list_item(trimmed);
             output.push_str(&formatted);
@@ -737,6 +832,7 @@ pub(super) fn to_markdown_from_lines_with_tables_and_images(
             if in_paragraph {
                 output.push_str("\n\n");
                 in_paragraph = false;
+                paragraph_in_wrapped_bold_run = false;
             }
             output.push_str(&format!("> {}\n", trimmed));
             continue;
@@ -747,6 +843,7 @@ pub(super) fn to_markdown_from_lines_with_tables_and_images(
             if in_paragraph {
                 output.push_str("\n\n");
                 in_paragraph = false;
+                paragraph_in_wrapped_bold_run = false;
             }
             if !in_code_block {
                 output.push_str("```\n");
@@ -767,6 +864,11 @@ pub(super) fn to_markdown_from_lines_with_tables_and_images(
             }
         }
         output.push_str(trimmed);
+        paragraph_in_wrapped_bold_run = if in_paragraph {
+            paragraph_in_wrapped_bold_run || line_in_wrapped_bold_run
+        } else {
+            line_in_wrapped_bold_run
+        };
         in_paragraph = true;
         prev_had_dot_leaders = cur_dot_leaders;
     }
@@ -836,6 +938,8 @@ pub fn to_markdown_from_lines(lines: Vec<TextLine>, options: MarkdownOptions) ->
     let para_threshold = compute_paragraph_threshold(&lines, base_size);
 
     let isolated_lines = find_isolated_lines(&lines, base_size, para_threshold);
+    let wrapped_bold_paragraph_lines =
+        find_wrapped_bold_paragraph_lines(&lines, base_size, para_threshold);
 
     let mut output = String::new();
     let mut current_page = 0u32;
@@ -844,6 +948,7 @@ pub fn to_markdown_from_lines(lines: Vec<TextLine>, options: MarkdownOptions) ->
     let mut in_paragraph = false;
     let mut last_list_x: Option<f32> = None;
     let mut prev_had_dot_leaders = false;
+    let mut paragraph_in_wrapped_bold_run = false;
 
     for (line_idx, line) in lines.iter().enumerate() {
         // Page break
@@ -860,6 +965,7 @@ pub fn to_markdown_from_lines(lines: Vec<TextLine>, options: MarkdownOptions) ->
             in_list = false;
             last_list_x = None;
             prev_had_dot_leaders = false;
+            paragraph_in_wrapped_bold_run = false;
 
             if options.include_page_numbers {
                 output.push_str(&format!("<!-- Page {} -->\n\n", current_page));
@@ -870,9 +976,18 @@ pub fn to_markdown_from_lines(lines: Vec<TextLine>, options: MarkdownOptions) ->
         // (newspaper columns emitted sequentially on the same page).
         let y_gap = prev_y - line.y;
         let is_para_break = y_gap.abs() > para_threshold;
-        if is_para_break && in_paragraph {
+        let line_all_bold = !line.items.is_empty() && line.items.iter().all(|item| item.is_bold);
+        let line_in_wrapped_bold_run = wrapped_bold_paragraph_lines.contains(&line_idx);
+        let is_bold_to_regular_break = in_paragraph
+            && paragraph_in_wrapped_bold_run
+            && !line_in_wrapped_bold_run
+            && !line_all_bold
+            && y_gap > base_size * 1.2
+            && y_gap <= para_threshold;
+        if (is_para_break || is_bold_to_regular_break) && in_paragraph {
             output.push_str("\n\n");
             in_paragraph = false;
+            paragraph_in_wrapped_bold_run = false;
         }
         // Don't immediately end list on paragraph break
         // Let the continuation check below decide if we're still in a list
@@ -896,6 +1011,7 @@ pub fn to_markdown_from_lines(lines: Vec<TextLine>, options: MarkdownOptions) ->
             if in_paragraph {
                 output.push_str("\n\n");
                 in_paragraph = false;
+                paragraph_in_wrapped_bold_run = false;
             }
             output.push_str(trimmed);
             output.push_str("\n\n");
@@ -918,6 +1034,9 @@ pub fn to_markdown_from_lines(lines: Vec<TextLine>, options: MarkdownOptions) ->
                     if !(1..=15).contains(&word_count) {
                         return None;
                     }
+                    if wrapped_bold_paragraph_lines.contains(&line_idx) {
+                        return None;
+                    }
                     let rarity = font_size_rarity(line_font_size, &font_stats);
                     let all_bold = !line.items.is_empty() && line.items.iter().all(|i| i.is_bold);
                     let standalone = !in_paragraph;
@@ -935,6 +1054,7 @@ pub fn to_markdown_from_lines(lines: Vec<TextLine>, options: MarkdownOptions) ->
                 if in_paragraph {
                     output.push_str("\n\n");
                     in_paragraph = false;
+                    paragraph_in_wrapped_bold_run = false;
                 }
                 let prefix = "#".repeat(header_level);
                 // Use plain text for headers to avoid redundant formatting
@@ -949,6 +1069,7 @@ pub fn to_markdown_from_lines(lines: Vec<TextLine>, options: MarkdownOptions) ->
             if in_paragraph {
                 output.push_str("\n\n");
                 in_paragraph = false;
+                paragraph_in_wrapped_bold_run = false;
             }
             let formatted = format_list_item(trimmed);
             output.push_str(&formatted);
@@ -993,6 +1114,7 @@ pub fn to_markdown_from_lines(lines: Vec<TextLine>, options: MarkdownOptions) ->
                 if in_paragraph {
                     output.push_str("\n\n");
                     in_paragraph = false;
+                    paragraph_in_wrapped_bold_run = false;
                 }
                 // Use plain text for code blocks
                 output.push_str(&format!("```\n{}\n```\n", plain_trimmed));
@@ -1010,6 +1132,11 @@ pub fn to_markdown_from_lines(lines: Vec<TextLine>, options: MarkdownOptions) ->
             }
         }
         output.push_str(trimmed);
+        paragraph_in_wrapped_bold_run = if in_paragraph {
+            paragraph_in_wrapped_bold_run || line_in_wrapped_bold_run
+        } else {
+            line_in_wrapped_bold_run
+        };
         in_paragraph = true;
         prev_had_dot_leaders = cur_dot_leaders;
     }
@@ -1356,6 +1483,109 @@ mod tests {
         );
     }
 
+    #[test]
+    fn test_wrapped_bold_abstract_is_not_split_into_headings() {
+        // Regression for arXiv 1107.1353: the opening abstract paragraph is
+        // entirely bold at body size. The first wrapped lines used to become
+        // separate H2 headings, and the following body paragraph was joined to
+        // the bold abstract because the paragraph gap is modest.
+        let make = |text: &str, y: f32, font_size: f32, bold: bool| {
+            let mut item = make_item(text, 1, None);
+            item.y = y;
+            item.font_size = font_size;
+            item.height = font_size;
+            item.is_bold = bold;
+            item
+        };
+
+        let lines = vec![
+            make_line(vec![make(
+                "Quantum Nature of Light Measured With a Single Detector",
+                747.7,
+                25.0,
+                true,
+            )]),
+            make_line(vec![make(
+                "Gesine A. Steudle1*, Stefan Schietinger1, David Höckel1",
+                651.1,
+                11.0,
+                false,
+            )]),
+            make_line(vec![make(
+                "Zwiller2, and Oliver Benson1",
+                638.5,
+                11.0,
+                false,
+            )]),
+            make_line(vec![make(
+                "The introduction of light quanta by Einstein in 1905 triggered strong efforts to",
+                607.5,
+                11.0,
+                true,
+            )]),
+            make_line(vec![make(
+                "demonstrate the quantum properties of light directly, without involving matter",
+                594.8,
+                11.0,
+                true,
+            )]),
+            make_line(vec![make(
+                "quantization. It however took more than seven decades for the quantum granularity",
+                582.2,
+                11.0,
+                true,
+            )]),
+            make_line(vec![make(
+                "of light to be observed in the fluorescence of single atoms. Single atoms emit",
+                569.5,
+                11.0,
+                true,
+            )]),
+            make_line(vec![make(
+                "photons one at a time, this is typically demonstrated with a Hanbury-Brown-Twiss",
+                556.9,
+                11.0,
+                true,
+            )]),
+            make_line(vec![make(
+                "Our work significantly simplifies a widely used photon-correlation technique.",
+                544.2,
+                11.0,
+                true,
+            )]),
+            make_line(vec![make(
+                "A photon is a single excitation of a mode of the electromagnetic field.",
+                528.7,
+                11.0,
+                false,
+            )]),
+        ];
+
+        let md = to_markdown_from_lines_with_tables_and_images(
+            lines,
+            MarkdownOptions::default(),
+            HashMap::new(),
+            HashMap::new(),
+            &std::collections::HashSet::new(),
+            None,
+        );
+
+        assert!(
+            md.contains("# Quantum Nature of Light Measured With a Single Detector"),
+            "title should remain a heading: {md}"
+        );
+        assert!(
+            !md.contains("## The introduction")
+                && !md.contains("## demonstrate")
+                && !md.contains("## quantization"),
+            "bold abstract lines should not become headings: {md}"
+        );
+        assert!(
+            md.contains("technique.**\n\nA photon is a single excitation"),
+            "body paragraph should be separated from bold abstract: {md}"
+        );
+    }
+
     #[test]
     fn test_struct_role_code_multiline_accumulation() {
         let mut line1 = make_item("fn main() {", 1, Some(0));