Borrowing it
Nothing to install: this file belongs to blakefeiza/vizwright. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/blakefeiza/vizwright/main/.claude/skills/twb-authoring/SKILL.mdgit clone --depth 1 https://github.com/blakefeiza/vizwrightWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/blakefeiza/vizwright/twb-authoring)<a href="https://agentmods.dev/skills/blakefeiza/vizwright/twb-authoring"><img src="https://agentmods.dev/badge/skills/blakefeiza/vizwright/twb-authoring.svg" alt="Measured on agentmods" height="20"></a>What 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 5.1 | $0.00047 | $0.03337 |
| Opus 5 | $0.00023 | $0.01669 |
| Sonnet 5 | $0.00009 | $0.00667 |
| Haiku 4.5 | $0.00005 | $0.00334 |
Grade A, and why
twb-authoring 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 6d 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 — 303 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Tableau Workbook (.twb) XML Authoring
A .twb is UTF-8 XML. A .twbx is a zip containing the .twb plus a Data/
folder with data files. Target version='18.1' — every current Tableau Public
VOTD workbook we mined uses it, and Desktop 2024.1–2026.1 opens it.
Ground rules (learned from mining 20 VOTD winners):
- NEVER invent XML. Adapt patterns from
knowledge/xml-patterns/or the snippets in the chart-xml-library skill. - Back up the current
.twbbefore every edit (cp file.twb file.twb.bak-N). - After every edit: run
python3 tools/validate_twb.py <file>and fix errors before packaging withpython3 tools/package_twbx.py. - Field references must match the datasource column names EXACTLY,
including bracket syntax:
[Sales],[Order Date].
Workbook skeleton (element order matters)
<?xml version='1.0' encoding='utf-8' ?>
<workbook original-version='18.1' source-build='2026.1.0 (20261.26.0410.0924)'
source-platform='mac' version='18.1'
xmlns:user='http://www.tableausoftware.com/xml/user'>
<preferences />
<datasources> ... </datasources>
<worksheets> ... </worksheets>
<dashboards> ... </dashboards>
<windows> ... generate with tools/finalize_windows.py, see below ... </windows>
</workbook>
Three hard requirements confirmed by live Tableau load errors (2026-07-09):
source-buildon<workbook>is REQUIRED — omitting it fails the load with "Error(2,125): missing required attribute 'source-build'".- A dashboard
<window>must NOT be self-closing: its content model requires<viewpoints>+<active id='-1' />children. - The dashboard window's
<viewpoints>must contain one<viewpoint name='<worksheet>'><zoom type='entire-view' /></viewpoint>per worksheet used in the dashboard, AND every worksheet needs its own<window class='worksheet'>with a standard<cards>block. Missing viewpoints crash the loader with generic Internal Error 2805CF18 (assertHasVisualDocin DashboardController).
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.
- 6d ago First seen · 303 lines · 47 tokens per session scan A dea3003b2b7d
twb-authoring is a skill published in the GitHub repository blakefeiza/vizwright (3 stars, last pushed 1mo ago), licensed MIT. It adds 47 tokens to every session and 3,337 once invoked, about $0.0002 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 2026-08-31.
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selecting-vizro-charts
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designing-vizro-layouts
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