fix: preserve continuation-line glossary definitions

scripts/build-graph.mjs

@@ -239,20 +239,39 @@ export function parseGlossary(repoRoot) {
   const content = readFileSync(glossaryPath, "utf-8");
   const terms = [];
   let currentCategory = "";
+  const lines = content.split("\n");
+  const termPattern =
+    /^\*\*(?:\[([^\]]+)\]\(([^)]+)\)|([^*]+))\*\*:\s*(.*)/;
 
-  for (const line of content.split("\n")) {
+  for (let i = 0; i < lines.length; i++) {
+    const line = lines[i];
     const catMatch = line.match(/^### (.+)/);
     if (catMatch) {
       currentCategory = catMatch[1].trim();
       continue;
     }
-    const termMatch = line.match(
-      /^\*\*(?:\[([^\]]+)\]\(([^)]+)\)|([^*]+))\*\*:\s*(.*)/,
-    );
+    const termMatch = line.match(termPattern);
     if (termMatch) {
+      let definition = termMatch[4].trim();
+
+      // GLOSSARY.md occasionally puts a term's definition on the next line.
+      // Only consume the immediate continuation line, and never swallow the
+      // next category or glossary term if the definition is actually missing.
+      if (!definition) {
+        const continuation = lines[i + 1]?.trim();
+        if (
+          continuation &&
+          !continuation.startsWith("### ") &&
+          !termPattern.test(continuation)
+        ) {
+          definition = continuation;
+          i += 1;
+        }
+      }
+
       const term = {
         term: (termMatch[1] ?? termMatch[3]).trim(),
-        definition: termMatch[4].trim(),
+        definition,
         category: currentCategory,
       };
       if (termMatch[2]) term.href = termMatch[2].trim();

src/data/glossary.json

@@ -56,7 +56,7 @@
   },
   {
     "term": "Data Availability Layer (DA Layer)",
-    "definition": "",
+    "definition": "A dedicated network or service that publishes and stores the data required for DA (for example, rollup or application data), separate from the main execution chain.",
     "category": "Blockchain Architecture"
   },
   {

tests/build-graph.test.mjs

@@ -233,6 +233,93 @@ describe('classifyEdge', () => {
 // ---------------------------------------------------------------------------
 
 describe('parseGlossary', () => {
+  it('reads a definition from the immediate continuation line', () => {
+    const repoRoot = mkdtempSync(join(tmpdir(), 'ethsystems-glossary-'));
+    try {
+      writeFileSync(
+        join(repoRoot, 'GLOSSARY.md'),
+        `### Blockchain Architecture
+
+**Data Availability Layer (DA Layer)**:
+A dedicated network or service that publishes and stores the data required for DA.
+
+**Sequencer**: Orders L2 transactions.
+`,
+      );
+
+      const glossary = parseGlossary(repoRoot);
+
+      expect(glossary).toHaveLength(2);
+      expect(glossary[0]).toEqual({
+        term: 'Data Availability Layer (DA Layer)',
+        definition:
+          'A dedicated network or service that publishes and stores the data required for DA.',
+        category: 'Blockchain Architecture',
+      });
+      expect(glossary[1]).toEqual({
+        term: 'Sequencer',
+        definition: 'Orders L2 transactions.',
+        category: 'Blockchain Architecture',
+      });
+    } finally {
+      rmSync(repoRoot, { recursive: true, force: true });
+    }
+  });
+
+  it('does not consume the next term when a definition is missing', () => {
+    const repoRoot = mkdtempSync(join(tmpdir(), 'ethsystems-glossary-'));
+    try {
+      writeFileSync(
+        join(repoRoot, 'GLOSSARY.md'),
+        `### Blockchain Architecture
+
+**Missing Definition**:
+**Sequencer**: Orders L2 transactions.
+`,
+      );
+
+      const glossary = parseGlossary(repoRoot);
+
+      expect(glossary).toHaveLength(2);
+      expect(glossary[0].definition).toBe('');
+      expect(glossary[1].definition).toBe('Orders L2 transactions.');
+    } finally {
+      rmSync(repoRoot, { recursive: true, force: true });
+    }
+  });
+
+  it('does not consume the next category when a definition is missing', () => {
+    const repoRoot = mkdtempSync(join(tmpdir(), 'ethsystems-glossary-'));
+    try {
+      writeFileSync(
+        join(repoRoot, 'GLOSSARY.md'),
+        `### Blockchain Architecture
+
+**Missing Definition**:
+### Next Category
+
+**Sequencer**: Orders L2 transactions.
+`,
+      );
+
+      const glossary = parseGlossary(repoRoot);
+
+      expect(glossary).toHaveLength(2);
+      expect(glossary[0]).toEqual({
+        term: 'Missing Definition',
+        definition: '',
+        category: 'Blockchain Architecture',
+      });
+      expect(glossary[1]).toEqual({
+        term: 'Sequencer',
+        definition: 'Orders L2 transactions.',
+        category: 'Next Category',
+      });
+    } finally {
+      rmSync(repoRoot, { recursive: true, force: true });
+    }
+  });
+
   it('preserves linked term hrefs and definition markdown', () => {
     const repoRoot = mkdtempSync(join(tmpdir(), 'ethsystems-glossary-'));
     try {