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.
npx agentmods add commands/zircote/yaml-lsp/setupgit clone --depth 1 https://github.com/zircote/yaml-lspWhat 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 | $0.00008 | $0.00287 |
| Opus 5 | $0.00004 | $0.00143 |
| Sonnet 5 | $0.00002 | $0.00057 |
| Haiku 4.5 | $0.00001 | $0.00029 |
Grade A, and why
setup 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.
What it actually says
YAML LSP Setup
This command will configure your YAML development environment with yaml-language-server and essential tools.
Prerequisites Check
First, verify Node.js and Python are installed:
node --version
npm --version
python3 --version
Installation Steps
1. Install yaml-language-server
npm install -g yaml-language-server
2. Install Development Tools
# Validation
pip install yamllint
# Formatting
npm install -g prettier
# YAML processing
brew install yq
3. Verify Installation
yaml-language-server --version
yamllint --version
prettier --version
yq --version
4. Enable LSP in Claude Code
export ENABLE_LSP_TOOL=1
Verification
Test the LSP integration:
# Create a test file
cat > test_lsp.yaml << 'EOF'
name: Test
version: 1.0.0
features:
- validation
- formatting
EOF
# Run yamllint
yamllint test_lsp.yaml
# Run prettier
prettier --write test_lsp.yaml
# Clean up
rm test_lsp.yaml
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 · 78 lines · 8 tokens per session scan A 5cc7848aa8c2
setup is a command published in the GitHub repository zircote/yaml-lsp (3 stars, last pushed 22d ago), licensed MIT. It adds 8 tokens to every session and 287 once invoked, about $0.0000 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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Interactive setup for Kotlin LSP development environment.