What is xlsx-for-ai CLAUDE.md?

Repository instructions for xlsx-for-ai, a command-line tool that converts Excel .xlsx spreadsheets into text or JSON that AI coding agents can read. They identify required project documents, security guidance, and review steps for risky changes and releases.

Use them when changing spreadsheet parsing, output formats, redaction, telemetry, command-line options, package exports, security-sensitive code, or the publishing process.

They help an agent understand the tool and apply the project's required review and security checks before committing or publishing changes.

How senoff/xlsx-for-ai configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to senoff/xlsx-for-ai. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/senoff/xlsx-for-ai/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/senoff/xlsx-for-ai

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/senoff/xlsx-for-ai/claude-md/github.svg)](https://agentmods.dev/instructions/senoff/xlsx-for-ai/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/senoff/xlsx-for-ai/claude-md"><img src="https://agentmods.dev/badge/instructions/senoff/xlsx-for-ai/claude-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/senoff/xlsx-for-ai/claude-md"><img src="https://agentmods.dev/badge/instructions/senoff/xlsx-for-ai/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,368 This file is loaded in full into every session.

When invoked 1,368 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.01368	$0.01368
Opus 5.5	$0.00547	$0.00547
Sonnet 5.5	$0.00274	$0.00274
Haiku 4.5	$0.00137	$0.00137

Measured 2mo ago against content hash cdaef5dacb7f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

xlsx-for-ai CLAUDE.md 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 2mo 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.

CLAUDE.md · 62 lines

How it starts

The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.

xlsx-for-ai — agent loading guide

xlsx-for-ai is a CLI that converts .xlsx files into rich text or JSON dumps for AI coding agents. It is npm-published (xlsx-for-ai, ~100+ downloads/day). A bad release has wider blast radius than a solo internal bug, so the discipline bar is higher.

Always-load

README.md — what the tool does, supported flags, output formats.
REVIEW.md — the cross-family multi-review gate (run npm run review before commits to risk areas; see file for full list).
SECURITY.md — threat model + reporting policy.
WHY.md — product framing and audience.

Load on relevance

docs/ — design notes for individual subsystems (telemetry, redactor, region autodetect, integrity pinning).

Review gate (mandatory unless explicitly skipped)

Per REVIEW.md:

Before commit on risk areas (engine seam, redactor, telemetry, CLI surface, package.json exports, security-relevant code, diffs >~50 lines): npm run review
Before npm publish: multi-review against git diff <last-tag>..main plus the full test suite plus a fresh-dir clean-install smoke test.

Skip allowed only for the categories listed in REVIEW.md (typos, doc edits, single-line self-evident fixes, no-op version bumps).

CRITICAL and HIGH findings must be resolved before the change lands. MEDIUM findings get fixed unless the commit message explains why not.

Repo posture

Solo repo. Direct push to main is allowed within Bob's normal autonomy. PRs are encouraged for any change touching the review-gate risk areas above — eat your own cooking.
Commits do not include a Co-Authored-By: Claude trailer (Bob 2026-06-10 — forward-only; existing trailered commits stay).
No --no-verify, no --amend after the fact, no force-push. Append a new commit to fix things.
Releases happen via the GitHub Actions publish.yml workflow, not local npm publish.
Publishing (2026-06-03 — superseded the prior manual gate): xlsx-for-ai publishes follow the fleet-wide "publish-on-own-judgment if Grace-clean" rule per ~/CLAUDE.md. Per-commit grace-autofix-loop clean + any blocking CRITICALs resolved → publish + mention what shipped in summary; don't ask first. The prior "Do not publish without Bob's explicit go" rule has been retired in favor of the Grace gate stack carrying the confidence. Pre-Grace builds still route through Grace first.

Read the full file on GitHub · 62 lines

Changes

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.

2mo ago First seen · 62 lines · 1,368 tokens per session scan A cdaef5dacb7f

Subscribe to this mod's changes

xlsx-for-ai CLAUDE.md is an instructions file published in the GitHub repository senoff/xlsx-for-ai (6 stars, last pushed 26d ago), licensed MIT. It adds 1,368 tokens to every session, about $0.0055 per session on Opus 5.5. 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 2026-08-31.

Documents Spreadsheets agent ai claude cli copilot cursor

xlsx-for-ai CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
xlsx-for-ai CLAUDE.mdsenoff/xlsx-for-ai	Instructions file	6	26d ago	MIT	A	1,368	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,685	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	279k	yesterday	MIT	A	4,325	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,086	GitHub Copilot

xlsx-for-ai: Instructions file for Claude Code