davepoon/buildwithclaude · plugins/all-skills/skills/xlsx/SKILL.md

xlsx skillA

xlsx is agent-read markdown (skill) from davepoon/buildwithclaude: 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 davepoon/buildwithclaude/xlsx@git:20260104.903b22f
Exact content
mdr add davepoon/buildwithclaude/xlsx@sha256:466a88ca0a9aac81

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_ykdzjdm6ysk5oeha.svg)](https://markdownregistry.com/a/art_ykdzjdm6ysk5oeha)

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Versions

versioncommittedcommitsizeaudit
git:20260104.903b22f latest2026-01-04 903b22f 10,662 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 (10662 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

davepoon/buildwithclaude · 3,477 stars · license MIT · pushed 2026-09-17 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_ykdzjdm6ysk5oeha
GET https://markdownregistry.com/api/v1/resolve?ref=davepoon/buildwithclaude/xlsx
GET https://markdownregistry.com/api/v1/blob/466a88ca0a9aac81bd28b2f7cebfcdc1472160c21600bc06f8e13efd7ad7ce6a

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