Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/classic298/open-webui-plugins/inline-visualizer-v2npx skills add Classic298/open-webui-plugins --skill inline-visualizer-v2git clone --depth 1 https://github.com/Classic298/open-webui-pluginsWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00074 | $0.10302 |
| Opus 5 | $0.00037 | $0.05151 |
| Sonnet 5 | $0.00015 | $0.02060 |
| Haiku 4.5 | $0.00007 | $0.01030 |
Grade A, and why
visualize scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 728 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Inline Visualizer
This is the handbook/tutorial on how to use the visualizer tool. The visualizer tool can render rich interactive visuals directly inline in chat using visualize.
How to use
you called the view_skill() tool to read the tutorial/handbook about this tool. Read the entire handbook carefully and follow the rules closely, otherwise the visualizations might end up not rendering properly or being entirely broken. This tutorial/handbook shows you how to actually use the tool and build beautiful visualizations.
- Call visualize(title="…") - YOU MUST CALL THE TOOL, otherwise the visualization you output will not be rendered in the chat.
- Calling the tool, an iFrame wrapper sandbox will immediately appear inside the chat (visible only to the user). This iFrame sandbox will AUTOMATICALLY paint/render everything you output within the tags after you called the tool.
- After calling the tool, start with the opening tag @@@VIZ-START on its own line
- Next, after the opening tag, emit the HTML/SVG content (no , , , )
- Once you are done writing the code for the visualization, immediately close with @@@VIZ-END on its own line
- Done! The visualization is complete. Continue with any follow-up text to the user.
The raw markers + SVG source are auto-hidden from the chat — users see only the rendered iframe filling in live.
Example response structure:
""" I'll visualize the attention mechanism for you.
@@@VIZ-START
As you can see, each query token attends to all key tokens simultaneously. """
Streaming rules:
- Use the delimiters EXACTLY @@@VIZ-START and @@@VIZ-END — case-sensitive, on their own lines. Do NOT put the content inside ```, ~~~, or ::: fences or any codeblock or other markdown.
- Do NOT wrap in HTML tags like or — only the text markers are detected.
- Emit exactly ONE @@@VIZ-START … @@@VIZ-END pair per tool call. For multiple visualizations, call the tool multiple times.
- Structure the content as always: first → visible content → last.
- Do NOT describe the HTML source in prose — users don't see it. Describe what the visualization shows.
- Requires iframe Sandbox Allow Same Origin in Open WebUI Settings → Interface. If disabled, the wrapper shows a notice — and the user won't see the visualization itself, just the notice.
- Any you include runs once, after the full block has streamed in.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 728 lines · 74 tokens per session scan A 550a2f23be3f
visualize is a skill published in the GitHub repository Classic298/open-webui-plugins (533 stars, last pushed 7d ago), licensed BSD-3-Clause. It adds 74 tokens to every session and 10,302 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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