What is contributing?

A contributor guide for changing OverleafMCP, a server that lets software work with shared Overleaf writing projects. It explains the code layout, required safety rules, and testing process.

Use it before editing the OverleafMCP code, adding a tool, or changing its editor and operations layer.

It helps developers avoid breaking rules that protect human review and keep edits attached to the right text while people type.

How ayghri/overleaf-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to ayghri/overleaf-mcp. 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/ayghri/overleaf-mcp/main/.claude/skills/contributing/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/ayghri/overleaf-mcp

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/skills/ayghri/overleaf-mcp/contributing/github.svg)](https://agentmods.dev/skills/ayghri/overleaf-mcp/contributing)

Your own site

<a href="https://agentmods.dev/skills/ayghri/overleaf-mcp/contributing"><img src="https://agentmods.dev/badge/skills/ayghri/overleaf-mcp/contributing/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/skills/ayghri/overleaf-mcp/contributing"><img src="https://agentmods.dev/badge/skills/ayghri/overleaf-mcp/contributing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 70 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,816 The whole file, excluding the scripts and references it only reads on demand.

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	$0.00070	$0.01816
Opus 5.5	$0.00028	$0.00726
Sonnet 5.5	$0.00014	$0.00363
Haiku 4.5	$0.00007	$0.00182

Measured 2mo ago against content hash c2decb72c0b0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

contributing 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/skills/contributing/SKILL.md · 135 lines

How it starts

The opening of the file, as written. The whole thing — 135 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Contributing to OverleafMCP

An MCP server that drives an Overleaf project as a live collaborator. Read this before changing overleaf_mcp/. Keep the four invariants below intact — they are safety- and correctness-critical, not stylistic.

Hard invariants (do not weaken)

Review mode is enforced in code, not by the account role. Every edit is a tracked-change suggestion: apply_op always attaches a meta.tc id and never branches on permission level. Even if the bot account were promoted to full editor, the MCP must still only suggest. Never add a "direct write" path.
Edit by the content-anchored cursor, never by raw line numbers. Placement is goto_text (content) / goto_file; the cursor is a character offset that is OT-transformed on every incoming edit (_transform_offset), so it stays pinned while a human types. Line-number-based mutation is a known bug source and is banned in the edit tools. select_to_text must search FORWARD from the cursor (_find_nth_from), not globally — a global search once resolved a repeated anchor (\end{proof}) to an earlier occurrence and selected backward over 27k chars. Keep the forward default; backward needs allow_backward.
Reads are served from the live cache and must not move the cursor. Only goto_file/goto_text and edits move the cursor. read_file/search/ list_files never do.
Latency budget: interactive actions target ≤50ms (see below). Anything that can be served from the in-memory subscription must not do a network round-trip.

Tracked-change gotchas

Overleaf merges adjacent same-author tracked ranges. So a change's live length (from list_changes) can grow after a neighbouring edit — undoing a deletion re-inserts text next to an insertion, and the two fuse. Any op that acts on a change by id (undo_change, revise_change) must not assume the range is the length you created it at; undo_change takes expect_chars to assert this. Don't reintroduce blind by-id deletion.
undo_change on a deletion re-inserts (reviewers can't reject), so it is not truly "zero residual" — it leaves a content-neutral insert+delete pair. Prefer fixing the selection up front over undo-chaining.

Read the full file on GitHub · 135 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 · 135 lines · 70 tokens per session scan A c2decb72c0b0

Subscribe to this mod's changes

contributing is a skill published in the GitHub repository ayghri/overleaf-mcp (5 stars, last pushed 25d ago), licensed MIT. It adds 70 tokens to every session and 1,816 once invoked, about $0.0003 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.

contributing next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
contributingayghri/overleaf-mcp	Skill	5	25d ago	MIT	A	70	Claude Code
imagegenopenai/codex	Skill	135k	today	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	100k	today	Apache-2.0	A	19	Claude Code
browser-automationopenclaw/openclaw	Skill	394k	today	MIT	A	36	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	80k	6d ago	MIT	A	200	Claude Code, Codex
next-cache-components-adoptionvercel/next.js	Skill	143k	today	MIT	A	95	Claude Code
chat-pet-sprite-creationmicrosoft/vscode	Skill	195k	today	MIT	A	53	Claude Code, Codex

overleaf-mcp: Skill for Claude Code