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libreoffice-mcp-tools: Instructions file for Codex

AGENTS.md

libreoffice-mcp-tools AGENTS.md is an instructions file for Codex, OpenCode from passerbyflutter/libreoffice-mcp-tools. It costs 396 tokens per session, scanned A, original, MIT.

Project instructions for developing a TypeScript MCP server that uses LibreOffice to work with office documents. TypeScript is a programming language that adds types to JavaScript, and MCP lets agents call tools.

In plain words
What is it for?
Use it when adding or changing document tools, managing document sessions, handling DOCX/XLS/PPT files, or working with the LibreOffice adapter and its locking rules.
Why use it?
It gives contributors the project's structure, supported formats, tool conventions, and rules for safely managing LibreOffice processes.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is passerbyflutter/libreoffice-mcp-tools's own configuration. It tells Codex and OpenCode 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 396 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/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/passerbyflutter/libreoffice-mcp-tools

Made for: Codex, OpenCode.

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Per session 396 This file is loaded in full into every session.
When invoked 396 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 $0.00396 $0.00396
Opus 5.5 $0.00158 $0.00158
Sonnet 5.5 $0.00079 $0.00079
Haiku 4.5 $0.00040 $0.00040

Measured 2mo ago against content hash 688c32f33b84, 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 AGENTS.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.

AGENTS.md · 42 lines

What it actually says

AGENTS.md — LibreOffice MCP Tools

What This Is

TypeScript MCP server for AI agents to read/write/edit Office documents via LibreOffice. Mirrors chrome-devtools-mcp architecture. Token-efficient by design.

Quick Context

  • Entry: src/index.ts → createMcpServer()
  • Tools defined in src/tools/*.ts using defineTool() from src/tools/ToolDefinition.ts
  • All tools take docId (from document_open) + optional pagination params
  • LibreOffice subprocess managed by src/LibreOfficeAdapter.ts behind src/Mutex.ts
  • DOC/XLS/PPT legacy formats auto-converted on document_open via LibreOffice CLI

Key Files to Read First

  1. src/tools/ToolDefinition.ts — how to define a tool
  2. src/DocumentContext.ts — session/document management
  3. src/tools/tools.ts — all tool registration
  4. .github/copilot-instructions.md — full context

Coding Rules

  • TypeScript ESM, .js imports even for .ts files
  • Zod schemas for all tool params
  • Never spawn soffice directly — use LibreOfficeAdapter
  • Always acquire Mutex before LibreOffice calls
  • Response: appendText() for summaries, attachJson() for data, attachMarkdown() for doc content

Supported Formats

DOCX, DOC (via LO bridge), XLSX, XLS (via LO bridge), PPTX, PPT (via LO bridge), ODT, ODS, ODP, RTF (all via LO bridge), CSV, TXT (native), PDF (read-only via LO)

Build & Run

npm install
npm run build
node build/bin/libreoffice-mcp.js

Tests

npm test
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 · 42 lines · 396 tokens per session scan A 688c32f33b84

Subscribe to this mod's changes

libreoffice-mcp-tools AGENTS.md is an instructions file published in the GitHub repository passerbyflutter/libreoffice-mcp-tools (0 stars, last pushed 6mo ago), licensed MIT. It adds 396 tokens to every session, about $0.0016 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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