diff --git a/crates/notgraph/src/emit.rs b/crates/notgraph/src/emit.rs
new file mode 100644
index 0000000..951f2b1
--- /dev/null
+++ b/crates/notgraph/src/emit.rs
@@ -0,0 +1,107 @@
+use crate::types::{GraphStats, HotspotKind, SymbolKind, SymbolTable};
+use anyhow::Result;
+use std::path::Path;
+
+pub fn write_all(output_dir: &Path, stats: &GraphStats, symbol_tables: &[SymbolTable]) -> Result<()> {
+    std::fs::create_dir_all(output_dir)?;
+    write_json(output_dir, stats)?;
+    write_markdown(output_dir, stats, symbol_tables)?;
+    write_html(output_dir, stats)?;
+    Ok(())
+}
+
+fn write_json(dir: &Path, stats: &GraphStats) -> Result<()> {
+    std::fs::write(dir.join("report.json"), serde_json::to_string_pretty(stats)?)?;
+    Ok(())
+}
+
+fn write_markdown(dir: &Path, stats: &GraphStats, symbol_tables: &[SymbolTable]) -> Result<()> {
+    let mut md = String::new();
+    md.push_str("# notgraph Report\n\n");
+
+    md.push_str("## Crate Dependency Graph\n\n");
+    for fs in &stats.crate_graph {
+        md.push_str(&format!("- **{}** (fan-in: {}, fan-out: {})\n", fs.name, fs.fan_in, fs.fan_out));
+    }
+    md.push('\n');
+
+    md.push_str("## Module Graphs\n\n");
+    for ms in &stats.module_graphs {
+        let status = if ms.cycles.is_empty() { "OK" } else { "CYCLES DETECTED" };
+        md.push_str(&format!(
+            "### {} [{}]\n\n- Modules: {}\n- Cycles: {}\n\n",
+            ms.krate, status, ms.nodes.len(), ms.cycles.len()
+        ));
+    }
+
+    md.push_str("## Hotspots\n\n### Fan-in (most depended-upon)\n\n");
+    md.push_str("| Name | Score |\n|------|-------|\n");
+    for h in stats.hotspots.iter().filter(|h| h.kind == HotspotKind::FanIn) {
+        md.push_str(&format!("| {} | {} |\n", h.name, h.score));
+    }
+    md.push('\n');
+
+    md.push_str("### Fan-out (highest coupling)\n\n");
+    md.push_str("| Name | Score |\n|------|-------|\n");
+    for h in stats.hotspots.iter().filter(|h| h.kind == HotspotKind::FanOut) {
+        md.push_str(&format!("| {} | {} |\n", h.name, h.score));
+    }
+    md.push('\n');
+
+    md.push_str("## Public Symbol Inventory\n\n");
+    for table in symbol_tables {
+        md.push_str(&format!("### {}\n\n", table.krate));
+        for kind in [SymbolKind::Struct, SymbolKind::Enum, SymbolKind::Trait, SymbolKind::Fn, SymbolKind::Type, SymbolKind::Const] {
+            let syms: Vec<&str> = table.symbols.iter()
+                .filter(|s| s.kind == kind && s.is_pub)
+                .map(|s| s.name.as_str())
+                .collect();
+            if !syms.is_empty() {
+                md.push_str(&format!("**{}**: {}\n\n", kind, syms.join(", ")));
+            }
+        }
+    }
+
+    md.push_str("## Cycle Report\n\n");
+    if stats.cycles.is_empty() {
+        md.push_str("No cycles detected.\n");
+    } else {
+        for cycle in &stats.cycles {
+            md.push_str(&format!("- CYCLE: {}\n", cycle.join(" -> ")));
+        }
+    }
+
+    std::fs::write(dir.join("report.md"), md)?;
+    Ok(())
+}
+
+fn write_html(dir: &Path, stats: &GraphStats) -> Result<()> {
+    let nodes_js: String = stats.crate_graph.iter().enumerate()
+        .map(|(i, n)| format!("{{id:{},label:{:?},title:'fan-in:{} fan-out:{}'}}", i, n.name, n.fan_in, n.fan_out))
+        .collect::<Vec<_>>()
+        .join(",");
+
+    let cycle_html = if stats.cycles.is_empty() {
+        "<p>No cycles detected.</p>".to_string()
+    } else {
+        stats.cycles.iter()
+            .map(|c| format!("<p>CYCLE: {}</p>", c.join(" -&gt; ")))
+            .collect::<Vec<_>>()
+            .join("\n")
+    };
+
+    let hotspot_rows: String = stats.hotspots.iter()
+        .map(|h| format!("<tr><td>{}</td><td>{}</td><td>{}</td></tr>", h.name, h.kind, h.score))
+        .collect::<Vec<_>>()
+        .join("\n");
+
+    let html = format!(
+        include_str!("../templates/report.html.template"),
+        nodes_js = nodes_js,
+        hotspot_rows = hotspot_rows,
+        cycle_html = cycle_html,
+    );
+
+    std::fs::write(dir.join("report.html"), html)?;
+    Ok(())
+}
diff --git a/crates/notgraph/src/lib.rs b/crates/notgraph/src/lib.rs
index 623dd2d..4dc1a11 100644
--- a/crates/notgraph/src/lib.rs
+++ b/crates/notgraph/src/lib.rs
@@ -1,5 +1,6 @@
 pub mod analysis;
 pub mod crate_graph;
+pub mod emit;
 pub mod module_graph;
 pub mod symbols;
 pub mod types;
diff --git a/crates/notgraph/templates/report.html.template b/crates/notgraph/templates/report.html.template
new file mode 100644
index 0000000..15050de
--- /dev/null
+++ b/crates/notgraph/templates/report.html.template
@@ -0,0 +1,58 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="UTF-8">
+<title>notgraph Report</title>
+<script src="https://unpkg.com/vis-network/standalone/umd/vis-network.min.js"></script>
+<style>
+  body {{ font-family: sans-serif; margin: 2rem; max-width: 1200px; }}
+  #graph {{ height: 400px; border: 1px solid #ccc; margin-bottom: 2rem; }}
+  table {{ border-collapse: collapse; width: 100%; margin-bottom: 2rem; }}
+  th, td {{ border: 1px solid #ccc; padding: 0.4rem 0.8rem; text-align: left; }}
+  th {{ background: #f5f5f5; cursor: pointer; user-select: none; }}
+  th:hover {{ background: #e8e8e8; }}
+  h2 {{ border-bottom: 2px solid #333; padding-bottom: 0.3rem; }}
+</style>
+</head>
+<body>
+<h1>notgraph Report</h1>
+<h2>Crate Dependency Graph</h2>
+<div id="graph"></div>
+<script>
+const nodes = new vis.DataSet([{nodes_js}]);
+const edges = new vis.DataSet([]);
+new vis.Network(document.getElementById('graph'), {{nodes, edges}}, {{
+  layout: {{ hierarchical: {{ direction: 'LR', sortMethod: 'directed' }} }},
+  physics: false,
+  nodes: {{ shape: 'box', color: {{ background: '#d4e8ff', border: '#336699' }} }}
+}});
+</script>
+<h2>Hotspots</h2>
+<table id="hotspots">
+<thead><tr>
+  <th onclick="sortTable('hotspots',0,this)">Name</th>
+  <th onclick="sortTable('hotspots',1,this)">Kind</th>
+  <th onclick="sortTable('hotspots',2,this)">Score</th>
+</tr></thead>
+<tbody>{hotspot_rows}</tbody>
+</table>
+<h2>Cycle Report</h2>
+{cycle_html}
+<script>
+function sortTable(id, col, th) {{
+  const t = document.getElementById(id);
+  const asc = th.dataset.dir !== 'asc';
+  th.dataset.dir = asc ? 'asc' : 'desc';
+  const rows = Array.from(t.querySelectorAll('tbody tr'));
+  rows.sort((a, b) => {{
+    const av = a.cells[col].textContent.trim();
+    const bv = b.cells[col].textContent.trim();
+    const cmp = av.localeCompare(bv, undefined, {{numeric: true}});
+    return asc ? cmp : -cmp;
+  }});
+  const tbody = t.querySelector('tbody');
+  rows.forEach(r => tbody.appendChild(r));
+}}
+</script>
+</body>
+</html>