appautomaton/document-skills · xlsx/SKILL.md

xlsx skillA

xlsx is agent-read markdown (skill) from appautomaton/document-skills: Comprehensive spreadsheet creation, editing, and analysis with support for formulas, formatting, data analysis, and visualization. When Claude needs to work with spreadsheets (.xlsx, .xlsm, .csv, .tsv, etc) for: (1) Creating new spreadsheets with formulas and formatting, (2) Reading or analyzing data, (3) Modify existing spreadsheets while preserving formulas, (4) Data analysis and visualization in spreadsheets, or (5) Recalculating formulas.

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 appautomaton/document-skills/xlsx@git:20260701.d034030
Exact content
mdr add appautomaton/document-skills/xlsx@sha256:2ff649fcb3b614e4

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_ariiw7fm3tz3sbh4.svg)](https://markdownregistry.com/a/art_ariiw7fm3tz3sbh4)

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Versions

versioncommittedcommitsizeaudit
git:20260701.d034030 latest2026-07-01 d034030 15,989 BA view · diff
git:20260608.e16861b2026-06-08 e16861b 15,554 BA view · diff
git:20260608.f149e602026-06-08 f149e60 15,575 BA view · diff
git:20260608.850e08a2026-06-08 850e08a 15,585 BA view · diff
git:20260326.1a5825f2026-03-26 1a5825f 15,638 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 (15989 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

appautomaton/document-skills · 163 stars · license MIT · pushed 2026-09-13 · branch master

API

GET https://markdownregistry.com/api/v1/artifacts/art_ariiw7fm3tz3sbh4
GET https://markdownregistry.com/api/v1/resolve?ref=appautomaton/document-skills/xlsx
GET https://markdownregistry.com/api/v1/blob/2ff649fcb3b614e4a004651cfcc79461028f0e026c9481eccd8598dbd4f6bb24

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