fcakyon/claude-codex-settings · plugins/anthropic-office-skills/skills/xlsx/SKILL.md

xlsx skillA

xlsx is agent-read markdown (skill) from fcakyon/claude-codex-settings: 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, .xltx, .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 xls.

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 fcakyon/claude-codex-settings/xlsx@git:20260720.d26d2c8
Exact content
mdr add fcakyon/claude-codex-settings/xlsx@sha256:6712b39718fe8150

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_sr34tch7ey2xfabx.svg)](https://markdownregistry.com/a/art_sr34tch7ey2xfabx)

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Versions

versioncommittedcommitsizeaudit
git:20260720.d26d2c8 latest2026-07-20 d26d2c8 8,598 BA view · diff
git:20260401.26dac1c2026-04-01 26dac1c 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 (8598 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

fcakyon/claude-codex-settings · 1,145 stars · license Apache-2.0 · pushed 2026-09-17 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_sr34tch7ey2xfabx
GET https://markdownregistry.com/api/v1/resolve?ref=fcakyon/claude-codex-settings/xlsx
GET https://markdownregistry.com/api/v1/blob/6712b39718fe815054abca9c3ee72f989613e6f771c8a5c58f30a65a6c905622

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