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 rules/trianglegrrl/versionator-mcp/versionator-mcp-servergit clone --depth 1 https://github.com/trianglegrrl/versionator-mcpWrote 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.
[](https://agentmods.dev/rules/trianglegrrl/versionator-mcp/versionator-mcp-server)<a href="https://agentmods.dev/rules/trianglegrrl/versionator-mcp/versionator-mcp-server"><img src="https://agentmods.dev/badge/rules/trianglegrrl/versionator-mcp/versionator-mcp-server.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00023 | $0.00381 |
| Opus 5 | $0.00012 | $0.00191 |
| Sonnet 5 | $0.00005 | $0.00076 |
| Haiku 4.5 | $0.00002 | $0.00038 |
Grade A, and why
versionator-mcp-server 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.
What it actually says
Versionator Integration Rules
Package Version Checking
- ALWAYS query the current version of packages using the Versionator MCP server before installing, updating, or recommending packages
- Use
get_package_version(package_manager, package_name)to get the latest version information - When suggesting package installations, include the specific version number obtained from Versionator
- Verify package existence and current versions before providing installation commands
Supported Package Managers
Use these package manager names with Versionator:
pythonorpypifor Python packagesnpmornodefor Node.js packagesrubyorgemfor Ruby gemsrustorcargofor Rust cratesgoorgolangfor Go modulesterraformortffor Terraform providersdockerordockerhubfor Docker imagesperlorcpanfor Perl modulesrorcranfor R packagesbiocondaorcondafor Bioconda packages
Examples
- Before suggesting
pip install pandas, queryget_package_version("python", "pandas")first - Before suggesting
npm install react, queryget_package_version("npm", "react")first - Before suggesting
cargo add serde, queryget_package_version("rust", "serde")first
Benefits
- Ensures users get the most current package versions
- Prevents installation of outdated or deprecated packages
- Provides accurate version information for dependency management
- Helps identify if packages exist before suggesting them
Versionator Integration Rules
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.
- 6d ago First seen · 37 lines · 23 tokens per session scan A 4f20a6c87685
versionator-mcp-server is a cursor rule published in the GitHub repository trianglegrrl/versionator-mcp (1 stars, last pushed 1y ago), licensed MIT. It adds 23 tokens to every session and 381 once invoked, about $0.0001 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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