A language server for YAML files, which are text files often used for configuration. It checks their structure against schemas, shows information when you inspect a value, and reports detected problems.

Use it when writing or reviewing .yaml and .yml files and when you want validation, inline information, and diagnostics in a compatible code editor.

It catches configuration mistakes while you edit instead of making you discover them later when a tool fails to start or deploy.

yaml-lsp — Plugin by anilcancakir

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Claude Code

/plugin marketplace add anilcancakir/claude-code-plugin

agentmods

npx agentmods add plugins/anilcancakir/claude-code-plugin/yaml-lsp

Clone the repo

git clone --depth 1 https://github.com/anilcancakir/claude-code-plugin

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

yaml-lsp 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 2d 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.

plugins/yaml-lsp/.claude-plugin/plugin.json · 9 lines

What it actually says

{
    "name": "yaml-lsp",
    "description": "YAML language server — schema validation, hover, and diagnostics for .yaml and .yml files.",
    "author": {
        "name": "Anilcan Cakir",
        "email": "[email protected]"
    }
}

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.

2d ago First seen · 9 lines scan A 5fba6ed1d6b9

Subscribe to this mod's changes

yaml-lsp is a plugin published in the GitHub repository anilcancakir/claude-code-plugin (2 stars, last pushed 4mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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.

Debugging Multi-Agent Orchestration Planning Writing and docs claude-code development-twin plan-first

yaml-lsp

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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