lumen-gallery

name	lumen-gallery
description	Generate image or audio comparison gallery as HTML with pivot grouping, dynamic filters, search, lightbox, starring. 5 templates (pivot matrix, simple batches, comparison cards, audio players, multi-mode). Invoke when user asks to compare visually, showcase, gallery, side by side, show iterations, multi-mode gallery, audio comparison.
version	0.1.9

lumen-gallery

Multi-mode gallery. Auto-discovered filters. Lightbox + starring + lazy load + search.

📄 Rendered example: docs/examples/gallery.html

Tier: capability (atomic) — does not invoke other lumen skills. Composites and playbooks may invoke it.

When to invoke

Triggers: gallery, showcase, compare visually, sprite gallery, side by side, create a gallery, show iterations, multi-mode gallery, audio comparison, voice cloning A/B.

5 templates (templates/)

Template	Best for
pivot-gallery.html	Matrix view (col × row grouping, dynamic pivot segs, score filter)
simple-gallery.html	Batch tabs + starring + lightbox + lazy load
comparison-gallery.html	Cards with spec tables + verdict badges
audio-gallery.html	Audio players + engine grouping (TTS A/B, voice cloning)
multi-mode-gallery.html	Mode tabs + per-mode DIMS + downloads dropdown

Copy the closest template, replace {{PLACEHOLDERS}}, customize the DIMS object. Full template-by-template walkthrough in templates/README.md.

DIMS pattern (auto-discovered filters)

Each gallery item exposes data-* attributes (e.g., data-engine="elevenlabs", data-voice="alice", data-score="0.92"). The DIMS JS object declares which dims are filterable; the runtime auto-discovers their unique values, builds filter buttons, and applies multi-select intersection filtering.

Runtime API (templates/gallery-base.js)

• buildDimFilters(DIMS, container) — auto-discover unique values per dim, create filter buttons
• applyDimFilters(items, DIMS, activeFilters) — filter visible items (intersection across dims)
• buildPivotSegsFromDims(DIMS, colId, rowId) — auto-build col / row segmentation buttons
• Lightbox (click to fullscreen, Esc to close, backdrop click to dismiss)
• Lazy loading (IntersectionObserver + loading="lazy" fallback)
• Starring (localStorage-persisted)
• Search (substring across data-* attrs)
• Size controls (zoom in/out)
• Toast notifications

Plus templates/gallery-base.css for the shared layout primitives (lightbox modal, filter chips, card grid, masonry/pivot variants).

Mode B (split files)

Galleries link gallery-base.{css,js} rather than inline (galleries can be many MB; split keeps the shell light). When deploying, drop the gallery HTML next to the assets folder, with gallery-base.css + gallery-base.js in a sibling location.

Pipeline

1. Receive item list:
   • Filename strings (["voice1.mp3", "voice2.mp3"]) — fall back to inferMeta(name) from gallery-base.js to extract dims from filename patterns
   • OR item objects ([{src, dims, score?, label?}]) — preferred when caller has structured data
2. Pick template based on shape:
   • matrix data → pivot-gallery
   • iteration batches → simple-gallery
   • spec comparison → comparison-gallery
   • audio → audio-gallery
   • multi-dataset → multi-mode-gallery
3. Inject items + DIMS schema into template.
4. Pick aesthetic (reuse _shared/aesthetics/*.css; default editorial.css for galleries).
5. Write file.

Fixtures

Reference input shapes ship in fixtures/:

• pivot.json — matrix-shaped data with score
• simple.json — batch-grouped iteration set
• comparison.json — spec-comparison cards
• audio.json — audio engine A/B

Use them as a template for the JSON your caller passes in.

Quality checks

• All data-* attrs match the keys declared in DIMS
• Lightbox has Esc-to-close + backdrop click
• Lazy loading fires below fold
• Starring persists across reload
• Mobile: touch swipe in lightbox, single-column fallback
• prefers-reduced-motion disables zoom transitions
• Files referenced in items[] exist (validate before writing HTML)

Output

• Single-file mode (small galleries, ≤30 items): everything inlined.
• Split-file mode (default for ≥30 items): shell HTML + gallery-base.{css,js} next to it.

Either mode opens via file://.

PI extension route (v0.1.x)

Not wired through lumen-generate_visual PI tool. A deterministic schema (template selector + item array with dims/scores + optional captions) is feasible but not yet implemented. Galleries still depend on user-provided assets (images / audio files), so the LLM-authored CC path remains the right fit when assets are present.

Sources

• Roxabi/roxabi-forge/plugins/forge/references/gallery-templates/ (MIT) — 5 templates + gallery-base.css + gallery-base.js + per-template walkthrough README
• Roxabi/roxabi-forge/plugins/forge/skills/forge-gallery/fixtures/ (MIT) — 4 input-shape fixtures
• skills/_shared/aesthetics/ (this package) — 5 aesthetics shared with diagrams + guides