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libreoffice-mcp-tools: Instructions file for GitHub Copilot

.github/copilot-instructions.md

libreoffice-mcp-tools copilot-instructions.md is an instructions file for GitHub Copilot from passerbyflutter/libreoffice-mcp-tools. It costs 2,788 tokens per session, scanned A, original, MIT.

Coding rules for a TypeScript server that lets AI tools read and edit office files through LibreOffice, including documents, spreadsheets, presentations, PDFs, and CSV files.

In plain words
What is it for?
Use it when developing or reviewing this server’s TypeScript code, document tools, spreadsheet access, pagination, and project architecture.
Why use it?
It keeps file access compact and structured, so agents do not need to load entire documents or spreadsheets at once.

Instructions file for GitHub Copilot

Written for GitHub Copilot: a Copilot instructions file.

This is passerbyflutter/libreoffice-mcp-tools's own configuration. It tells GitHub Copilot how to work on libreoffice-mcp-tools itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything libreoffice-mcp-tools configures →

not rated 0repo 6mo ago A scan 2,788 tokens original MIT
View source ↗ passerbyflutter/libreoffice-mcp-tools
Reuse

Borrowing it

Nothing to install: this file belongs to passerbyflutter/libreoffice-mcp-tools. 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/passerbyflutter/libreoffice-mcp-tools/main/.github/copilot-instructions.md
Clone the repo
git clone --depth 1 https://github.com/passerbyflutter/libreoffice-mcp-tools

Made for: GitHub Copilot.

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Per session 2,788 This file is loaded in full into every session.
When invoked 2,788 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.02788 $0.02788
Opus 5.5 $0.01115 $0.01115
Sonnet 5.5 $0.00558 $0.00558
Haiku 4.5 $0.00279 $0.00279

Measured 2mo ago against content hash 4b26f8dfd659, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

libreoffice-mcp-tools copilot-instructions.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.

.github/copilot-instructions.md · 214 lines

How it starts

The opening of the file, as written. The whole thing — 214 lines — stays where its author put it; the contents beside it link to each section on GitHub.

LibreOffice MCP Tools — Copilot Instructions

Project Overview

A TypeScript MCP (Model Context Protocol) server that lets AI/LLM agents read, write, and edit Office documents (DOCX, DOC, XLSX, XLS, PPTX, PPT, ODF, PDF, CSV, TXT) via LibreOffice. Designed to minimize token usage through structured, range-based, outline-first document access.

Reference architecture: chrome-devtools-mcp

Architecture Principles

Token Efficiency (Core Design Goal)

  1. Outline-first — document_get_outline returns headings/sheet names/slide titles BEFORE content
  2. Range-based access — document_read_range with paragraph/row/slide offsets, never dump whole doc
  3. Pagination — ALL list tools support limit + offset params
  4. Structured JSON — spreadsheet data as {headers: string[], rows: any[][]} not raw CSV
  5. Markdown output — text documents rendered as compact markdown (headings → #, bold → **, etc.)
  6. Metadata-first — word count, page count, sheet names BEFORE reading content

Technology Stack

  • Language: TypeScript, ESM modules ("type": "module" in package.json)
  • MCP SDK: @modelcontextprotocol/sdk
  • Schema validation: zod
  • Build: tsc (TypeScript compiler)
  • Native document parsers (fast, no LibreOffice needed for reads):
    • DOCX/DOTX: mammoth for text extraction, docx for writing
    • XLSX/XLS/ODS/CSV: xlsx (SheetJS)
    • PPTX: jszip + custom XML parser
  • LibreOffice CLI (soffice --headless) for:
    • Converting legacy binary formats (DOC→DOCX, XLS→XLSX, PPT→PPTX) before parsing
    • Exporting to PDF, HTML, etc.
    • Writing to ODF formats
    • Complex write operations on any format

File Format Support

Format Extensions Read Write Method
Word 2007+ .docx, .dotx ✅ ✅ Native (mammoth/docx)
Word 97-2003 .doc, .dot ✅ ✅ LibreOffice → DOCX bridge
Excel 2007+ .xlsx, .xlsm ✅ ✅ Native (SheetJS)
Excel 97-2003 .xls ✅ ✅ LibreOffice → XLSX bridge
PowerPoint 2007+ .pptx ✅ ✅ Native (JSZip XML)
PowerPoint 97-2003 .ppt ✅ ✅ LibreOffice → PPTX bridge
OpenDocument Text .odt ✅ ✅ LibreOffice bridge
OpenDocument Spreadsheet .ods ✅ ✅ LibreOffice bridge
OpenDocument Presentation .odp ✅ ✅ LibreOffice bridge
Rich Text Format .rtf ✅ ✅ LibreOffice bridge
CSV .csv ✅ ✅ Native (SheetJS/built-in)
PDF .pdf ✅ (text) ❌ LibreOffice CLI
Plain text .txt ✅ ✅ Native

Read the full file on GitHub · 214 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.

  1. 2mo ago First seen · 214 lines · 2,788 tokens per session scan A 4b26f8dfd659

Subscribe to this mod's changes

libreoffice-mcp-tools copilot-instructions.md is an instructions file published in the GitHub repository passerbyflutter/libreoffice-mcp-tools (0 stars, last pushed 6mo ago), licensed MIT. It adds 2,788 tokens to every session, about $0.0112 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.

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