marielynneblock/arcanum-artifex · skills/document-production/xlsx/SKILL.md

xlsx skillA

xlsx is agent-read markdown (skill) from marielynneblock/arcanum-artifex: Use this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read, edit, or fix an existing .xlsx, .xlsm, .csv, or .tsv file (e.g., adding columns, computing formulas, formatting, charting, cleaning messy data); create a new spreadsheet from scratch or from other data sources; or convert between tabular file formats. Trigger especially when the user references a spreadsheet file by name or path — even casually (like "the xlsx in my.

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add marielynneblock/arcanum-artifex/xlsx@git:20260710.0115f49
Exact content
mdr add marielynneblock/arcanum-artifex/xlsx@sha256:edb783cb2a68ef74

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_4y2vn46grinw7rze.svg)](https://markdownregistry.com/a/art_4y2vn46grinw7rze)

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Versions

versioncommittedcommitsizeaudit
git:20260710.0115f49 latest2026-07-10 0115f49 11,512 BA view · diff
git:20260710.ffb34002026-07-10 ffb3400 11,510 BA view · diff
git:20260515.b861afb2026-05-15 b861afb 11,510 BA view · diff
git:20260406.05dff342026-04-06 05dff34 11,463 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (11512 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

marielynneblock/arcanum-artifex · 4 stars · license none · pushed 2026-09-16 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_4y2vn46grinw7rze
GET https://markdownregistry.com/api/v1/resolve?ref=marielynneblock/arcanum-artifex/xlsx
GET https://markdownregistry.com/api/v1/blob/edb783cb2a68ef746d6136382910d0435308ce3535c36d000e875fe9d7f23630

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.