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code-map-visualization

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Rendering and perception layer for codebase-as-geohash-map visualisations — choosing what to encode on colour/size/position, picking perceptually honest colour scales (viridis/OKLCH, not rainbow), drawing tens of thousands of cells on Canvas2D + WebGL/deck.gl inside a 16ms frame budget, placing and decluttering labels, GPU or spatial-index picking, camera animation and level-of-detail crossfades, and keyboard plus screen-reader accessibility for the canvas. Sits on top of geohash-spatial-code-maps, which owns the geohash encoding, projection, tiling, and navigation math. Also covers nature-inspired rendering — Voronoi, circle packing, phyllotaxis, metaball hulls, edge bundling. Trigger even when the user does not say "visualisation" — if the work involves drawing, colouring, labelling, animating, or making navigable a code map, spatial heatmap, or large cell/point layer on the web, this is the skill.

skills/.experimental/code-map-visualization/SKILL.md

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Aug 15, 2026
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Observed agent integration: codex

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# Code Map Visualization Best Practices

How to render and visually navigate a codebase that has been projected and geohashed into a 2D map — making it honest, fast, legible, interactive, animated, and accessible. This is the rendering and perception craft on top of the spatial structure: it draws on decades of information-visualisation, cartography, computer-graphics, and nature-/biology-inspired layout knowledge so a code map reads correctly and runs at interactive rates. Contains 47 rules across 9 categories, prioritised by impact.

## When to Apply

Reference these guidelines when:

- Deciding what code attribute to put on which visual channel (position, size, colour) and which colour scale tells the truth
- Drawing tens of thousands to millions of cells on the web with Canvas2D, WebGL, or deck.gl, and keeping the render loop inside the frame budget
- Placing and decluttering region/file labels, and rendering legible text over a busy map
- Wiring up interaction — hover, picking, selection, a camera/view-state model, deep links, keyboard control
- Animating camera moves, level-of-detail transitions, and data updates without disorienting the viewer
- Making the canvas accessible to color-vision-deficient, motion-sensitive, keyboard-only, and screen-reader users