Browser-Resident Visualization Suite for Transformer Internals: Three Self-Contained HTML Tools Extending the Mercury-Viewer Pattern

© Copyright 2026 Chen, Ho Yiing (ORCID: 0009-0006-6816-9891), Independent researcher, charenix.com. All rights reserved by the author. This work is licensed under the Creative Commons Attribution 4.0.

Mercury-Viewer (10.5281/zenodo.20313150) established a design pattern for transformer interpretability tooling: a single self-contained HTML file, no install, no server, no API key, that opens in any browser and renders the inside of a transformer language model as an interactive 3D point cloud.

This artifact paper releases three follow-on tools applying the same pattern to three different questions:

1. overlap.html — cylindrical 3D point cloud of the 49-coordinate cross-model overlap and the 11-coordinate triple-confirmed subset from the cross-model dimensional preservation analysis (Mercury Paper A).
2. frankenstein-v1.html — three side-by-side cones showing qwen2.5-7B-Instruct, the SLERP merge, and qwen2.5-Coder-7B-Instruct, with 11 rose-gold lines marking protected anchors and the merge cone colored by SLERP t value.
3. frankenstein-arena.html — frozen snapshot of one inference pass rendered as cargo orbs traveling on cables between functional rooms (universal core, language detector, physics reasoning, etc.).

All three artifacts: single HTML file, no build step, no API key, no GPU dependency, every visible artifact hoverable, every numeric claim tied to an integer coordinate. Live at charenix.com/neuron-mercury/.

Limitation: no user study run. Pedagogical claims are informal.

Companion records: Mercury-Viewer (10.5281/zenodo.20313150), Mercury method (10.5281/zenodo.20313154), Mercury discovery (10.5281/zenodo.20313748), Mercury scaling (10.5281/zenodo.20325676).