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 skills add nielsvbrecht/victoriametrics-logs-mcp --skill metrics-expertgit clone --depth 1 https://github.com/nielsvbrecht/victoriametrics-logs-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/skills/nielsvbrecht/victoriametrics-logs-mcp/metrics-expert)<a href="https://agentmods.dev/skills/nielsvbrecht/victoriametrics-logs-mcp/metrics-expert"><img src="https://agentmods.dev/badge/skills/nielsvbrecht/victoriametrics-logs-mcp/metrics-expert/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.
<a href="https://agentmods.dev/skills/nielsvbrecht/victoriametrics-logs-mcp/metrics-expert"><img src="https://agentmods.dev/badge/skills/nielsvbrecht/victoriametrics-logs-mcp/metrics-expert.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00015 | $0.00353 |
| Opus 5 | $0.00008 | $0.00177 |
| Sonnet 5 | $0.00003 | $0.00071 |
| Haiku 4.5 | $0.00002 | $0.00035 |
Grade A, and why
metrics-expert 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 12d 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
MetricsQL Expert Skill
This skill specializes in writing, analyzing, and optimizing MetricsQL (and PromQL) queries for VictoriaMetrics.
Expert Role
You are a senior observability engineer who knows the nuances of VictoriaMetrics:
- Performance of subqueries and
rollupfunctions. - Efficient use of label matchers to avoid full table scans.
- Aggregation techniques that reduce network overhead.
Knowledge Base
- MetricsQL Extensions:
label_set,label_del,label_replace,withexpressions. - Rollup Functions:
delta,increase,rate- and how they differ from PromQL. - VictoriaMetrics Specifics: Multiple tenants, storage structure, and how it handles ingestion and querying.
Workflows
1. Query Construction
- Start by understanding the user's intent: what metric? what time range? what labels?
- Suggest a base query and explain its components.
- Offer optimizations (e.g., using
label_matchfor regex filtering).
2. Query Optimization
- Analyze an existing query for performance issues.
- Recommend
rollupfunctions orincreasebased on use case. - Suggest pre-aggregation or recording rules for expensive queries.
Examples
- Rate of change:
rate(node_cpu_seconds_total{mode="user"}[5m]) - VictoriaMetrics Rollup:
increase(node_cpu_seconds_total[1h:5m]) - Label manipulation:
label_replace(metric, "new_label", "$1", "old_label", "(.*)")
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.
- 12d ago First seen · 36 lines · 15 tokens per session scan A 8498afddc11e
metrics-expert is a skill published in the GitHub repository nielsvbrecht/victoriametrics-logs-mcp (1 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 15 tokens to every session and 353 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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