yaml-lsp: Instructions file for Claude Code

CLAUDE.md

yaml-lsp CLAUDE.md is an instructions file for Claude Code from zircote/yaml-lsp. It costs 195 tokens per session, scanned A, original, MIT.

Project instructions for a Claude Code plugin that adds YAML support through a language server and automated validation and formatting hooks. YAML is a text format commonly used for configuration files.

In plain words
What is it for?
They help install the YAML tools, configure language-server support, maintain validation hooks, and follow project rules such as two-space indentation and minimal changes.
Why use it?
They give contributors the setup commands, important files, and coding conventions needed to work consistently in the repository.

Instructions file for Claude Code

Written for Claude Code: Claude Code plugin machinery. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is zircote/yaml-lsp's own configuration. It tells Claude Code how to work on yaml-lsp 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 yaml-lsp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to zircote/yaml-lsp. 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/zircote/yaml-lsp/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/zircote/yaml-lsp

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.

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README.md
[![agentmods](https://agentmods.dev/badge/instructions/zircote/yaml-lsp/claude-md.svg)](https://agentmods.dev/instructions/zircote/yaml-lsp/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/zircote/yaml-lsp/claude-md"><img src="https://agentmods.dev/badge/instructions/zircote/yaml-lsp/claude-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 195 This file is loaded in full into every session.
When invoked 195 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.00195 $0.00195
Opus 5 $0.00097 $0.00097
Sonnet 5 $0.00039 $0.00039
Haiku 4.5 $0.00019 $0.00019

Measured 6d ago against content hash bd381217ceb7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

yaml-lsp 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 6d 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 · 34 lines

What it actually says

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

A Claude Code plugin providing YAML development support through yaml-language-server integration and automated hooks for validation and formatting.

Setup

Run /setup to install all required tools, or manually:

npm install -g yaml-language-server prettier
pip install yamllint

Key Files

File Purpose
.lsp.json yaml-language-server configuration
hooks/hooks.json Automated development hooks
hooks/scripts/yaml-hooks.sh Hook dispatcher script
commands/setup.md /setup command definition
.claude-plugin/plugin.json Plugin metadata

Conventions

  • Prefer minimal diffs
  • Keep hooks fast
  • Use 2-space indentation
  • Prefer explicit keys over anchors for clarity
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. 6d ago First seen · 34 lines · 195 tokens per session scan A bd381217ceb7

Subscribe to this mod's changes

yaml-lsp CLAUDE.md is an instructions file published in the GitHub repository zircote/yaml-lsp (3 stars, last pushed 27d ago), licensed MIT. It adds 195 tokens to every session, about $0.0010 per session on Opus 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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