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 skills add twells89/sigma-migration-skills --skill tableau-assessmentgit clone --depth 1 https://github.com/twells89/sigma-migration-skillsWrote 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/twells89/sigma-migration-skills/tableau-assessment)<a href="https://agentmods.dev/skills/twells89/sigma-migration-skills/tableau-assessment"><img src="https://agentmods.dev/badge/skills/twells89/sigma-migration-skills/tableau-assessment/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/twells89/sigma-migration-skills/tableau-assessment"><img src="https://agentmods.dev/badge/skills/twells89/sigma-migration-skills/tableau-assessment.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00110 | $0.09949 |
| Opus 5 | $0.00055 | $0.04974 |
| Sonnet 5 | $0.00022 | $0.01990 |
| Haiku 4.5 | $0.00011 | $0.00995 |
Grade A, and why
tableau-assessment 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 11d 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 — 766 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Tableau Assessment
Surveys a Tableau Cloud site via the Tableau Admin Insights project (MCP) and the
workbook-content REST endpoint (PAT) — or a self-hosted Tableau Server site via REST
only (inventory-rest.rb; no Admin Insights, so no usage/refresh stats). Emits a markdown readout + JSON inventory
the user can hand to a Sigma rep, a Hakkoda engagement, or directly to the
tableau-to-sigma skill for conversion of the shortlisted workbooks.
Warehouse-agnostic. This skill (and the downstream
tableau-to-sigmaconversion skill) makes no assumption about which warehouse Sigma is reading from — BigQuery, Databricks, Snowflake, Postgres, SQL Server, Redshift, Synapse, and Oracle are all treated the same way at the Sigma API layer (connections → tables → columns → query). Worked examples in this skill use Snowflake because that's where the dev / audit fixtures live, but the Sigma-side patterns transfer to any supported warehouse. The only warehouse-specific surface is the optional--snowflake-connreconciliation flag onmigration-plan.rb(see "Multi-warehouse considerations" below for the equivalent on other warehouses).
Privacy posture (READ FIRST, surface to the customer)
This skill reads workbook metadata, not warehouse data. What crosses Anthropic's API on its way through Claude:
| Crosses Anthropic API | Stays local |
|---|---|
| Aggregate counts (workbook count, user count, datasource counts) | View CSVs (this skill never fetches them) |
| Workbook names, owner emails, project names | Warehouse rows (this skill never queries them) |
User License Type and login dates from Admin Insights |
Customer database credentials |
| Refresh job results, durations, error messages | The customer's actual reports' values |
.twb XML for each workbook (calc-field definitions, custom SQL, layout) |
.hyper extract data files (skipped on download) |
This is a weaker posture than Hakkoda's "stays in Snowflake" app. Hakkoda's Snowflake Native App keeps everything inside the customer's Snowflake account. This skill — like every other Claude Code skill — sends what it reads through the Anthropic API to Claude. The user should be told this before running.
What ships with it
29 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.
- fixtures/ds-override-demosite.json 637 B
- PRIVACY.md 4.9 KB
- README.md 5.2 KB
- refs/admin-insights-fields.md 6.5 KB
- refs/environment.md 5.7 KB
- refs/output-shapes.md 6.4 KB
- refs/readout-template.md 7.5 KB
- refs/token-model.json 3.6 KB
- scripts/aggregate-complexity.rb 4.9 KB runs code
- scripts/analyze-datasources.rb 13 KB runs code
- scripts/analyze-users.rb 9.9 KB runs code
- scripts/analyze-views.rb 5.8 KB runs code
- scripts/bootstrap.ps1 41 KB runs code
- scripts/bootstrap.sh 44 KB runs code
- scripts/build-shortlist.rb 4.9 KB runs code
- scripts/consolidation-candidates.rb 25 KB runs code
- scripts/doctor.ps1 24 KB runs code
- scripts/doctor.sh 34 KB runs code
- scripts/fetch-all-twbs.rb 8.8 KB runs code
- scripts/fetch-metadata-graph.rb 2.5 KB runs code
- scripts/get-tableau-token.sh 4.3 KB runs code
- scripts/inventory-rest.rb 5.2 KB runs code
- scripts/migration-plan.rb 14 KB runs code
- scripts/orchestrate-batch.rb 36 KB runs code
- scripts/probe-admin-insights.rb 1.7 KB runs code
- scripts/render-readout-html.rb 69 KB runs code
- scripts/render-readout.rb 14 KB runs code
- scripts/setup-tableau.sh 3.4 KB runs code
- scripts/test-predicted-parity.rb 3.1 KB runs code
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.
- 11d ago First seen · 766 lines · 110 tokens per session scan A 2500e2860e53
tableau-assessment is a skill published in the GitHub repository twells89/sigma-migration-skills (16 stars, last pushed today), licensed MIT. It adds 110 tokens to every session and 9,949 once invoked, about $0.0006 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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