fix: cap schema-card skip-index line at MAX_IDX

CHANGELOG.md

@@ -245,6 +245,14 @@ auto-generated per-PR notes; this file is the curated, human-readable history.
   each pairing an `onclick: close` backdrop with an `onclick: stopPropagation`
   panel. The cell-detail drawer's resize-drag one-shot click-swallow listener
   (#101) is superseded by the same general fix. (#110)
+- The fullscreen schema graph's rich node card had no overflow cap on its
+  `idx:` skip-index line — unlike columns (capped at `MAX_COLS` with a "+N
+  more" row), every skip-index was joined onto one unbounded line. A
+  heavily-indexed table (e.g. an OTel-style log table with a bloom filter per
+  Map key/value plus a tokenbf on the body) produced a single line 1700px+
+  wide, blowing the card — and the whole graph layout — out of proportion.
+  `buildCardModel` now caps the line at `CARD.MAX_IDX` (6) with a "+N more"
+  suffix, mirroring the columns' overflow pattern.
 
 ## [0.1.5] - 2026-06-29
 

src/core/schema-cards.js

@@ -20,6 +20,9 @@ export const CARD = {
   BADGE_W: 26, // approx width of one role badge (PK/SK/PARTITION/SAMPLING)
   MIN_W: 130,
   MAX_COLS: 16,
+  MAX_IDX: 6, // skip-indices have no dedicated overflow row (unlike columns) — cap the
+              // single idx: line itself so a heavily-indexed table (bloom filters per
+              // Map key/value, tokenbf on Body, …) can't blow the card absurdly wide.
   MAX_TYPE: 28, // truncate the displayed column type — a big Enum/Tuple/Map would
                 // otherwise blow the card (and the whole graph) absurdly wide.
 };
@@ -64,8 +67,10 @@ export function buildCardModel(node, tableRow, columns, skipIndices) {
   }));
   const overflow = Math.max(0, allCols.length - CARD.MAX_COLS);
   const idx = skipIndices || [];
+  const idxOverflow = Math.max(0, idx.length - CARD.MAX_IDX);
   const skipLine = idx.length
-    ? 'idx: ' + idx.map((i) => i.name + ' (' + (i.type || '') + ')').join(', ')
+    ? 'idx: ' + idx.slice(0, CARD.MAX_IDX).map((i) => i.name + ' (' + (i.type || '') + ')').join(', ')
+      + (idxOverflow ? ', +' + idxOverflow + ' more' : '')
     : '';
   return { title: n.label || n.id || '', kind: n.kind || 'table', summary, cols, overflow, skipLine };
 }

tests/unit/schema-cards.test.js

@@ -36,6 +36,18 @@ describe('buildCardModel', () => {
     expect(m.overflow).toBe(1);
     expect(m.skipLine).toBe('idx: idx_a (minmax)');
   });
+  it('caps the skip-index line at MAX_IDX with a "+N more" suffix (no dedicated overflow row)', () => {
+    const idx = Array.from({ length: CARD.MAX_IDX + 2 }, (_, i) => ({ name: 'idx_' + i, type: 'bloom_filter' }));
+    const m = buildCardModel({ label: 'db.t', kind: 'table' }, {}, [], idx);
+    const shown = idx.slice(0, CARD.MAX_IDX).map((i) => i.name + ' (bloom_filter)').join(', ');
+    expect(m.skipLine).toBe('idx: ' + shown + ', +2 more');
+  });
+  it('does not append an overflow suffix when the index count is within MAX_IDX', () => {
+    const idx = Array.from({ length: CARD.MAX_IDX }, (_, i) => ({ name: 'idx_' + i, type: 'set' }));
+    const m = buildCardModel({ label: 'db.t', kind: 'table' }, {}, [], idx);
+    expect(m.skipLine).not.toContain('more');
+    expect(m.skipLine.match(/idx_/g)).toHaveLength(CARD.MAX_IDX);
+  });
   it('degrades to a header-only card for a leaf with no row/columns/indices', () => {
     const leaf = buildCardModel({ id: 'ext:mysql', label: 'mysql', kind: 'external' });
     expect(leaf.summary).toBe('external · — rows · —'); // engine falls back to kind