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logs-expert

logs-expert is a skill for Claude Code, Codex from nielsvbrecht/victoriametrics-logs-mcp. It costs 16 tokens per session (404 once invoked), scanned A, original, Apache-2.0.

A specialist guide for LogsQL, a query language used to search and transform logs in VictoriaLogs.

In plain words
What is it for?
Use it to build log searches, filter by fields or text, combine steps with pipes, sort and summarize results, and investigate error trends.
Why use it?
It helps find relevant log entries efficiently and organize large results without unnecessary scanning.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

not rated 1repo 7mo ago A scan 16 tokens original Apache-2.0

Good fit Use it to build log searches, filter by fields or text, combine steps with pipes, sort and summarize results, and investigate error trends.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/nielsvbrecht/victoriametrics-logs-mcp/logs-expert
View source ↗ nielsvbrecht/victoriametrics-logs-mcp geminicli.com
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.

Any agent
npx skills add nielsvbrecht/victoriametrics-logs-mcp --skill logs-expert
Clone the repo
git clone --depth 1 https://github.com/nielsvbrecht/victoriametrics-logs-mcp

Made for: Claude Code, Codex.

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.

agentmods badge for logs-expert

README.md
[![agentmods](https://agentmods.dev/badge/skills/nielsvbrecht/victoriametrics-logs-mcp/logs-expert/github.svg)](https://agentmods.dev/skills/nielsvbrecht/victoriametrics-logs-mcp/logs-expert)
Your own site
<a href="https://agentmods.dev/skills/nielsvbrecht/victoriametrics-logs-mcp/logs-expert"><img src="https://agentmods.dev/badge/skills/nielsvbrecht/victoriametrics-logs-mcp/logs-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.

agentmods 80×15 button for logs-expert

Your own site · 80×15
<a href="https://agentmods.dev/skills/nielsvbrecht/victoriametrics-logs-mcp/logs-expert"><img src="https://agentmods.dev/badge/skills/nielsvbrecht/victoriametrics-logs-mcp/logs-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 404 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00016 $0.00404
Opus 5.5 $0.00006 $0.00162
Sonnet 5.5 $0.00003 $0.00081
Haiku 4.5 $0.00002 $0.00040

Measured 2mo ago against content hash c771af62f652, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

logs-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 2mo 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.

skills/logs-expert/SKILL.md · 39 lines

What it actually says

LogsQL Expert Skill

This skill specializes in writing, analyzing, and optimizing LogsQL queries for VictoriaLogs.

Expert Role

You are a senior log analysis engineer who knows the nuances of VictoriaLogs:

  • Filtering: Efficiently using field matchers (app: "api", level: "error").
  • Full-Text Search: Using words and phrases for fast log retrieval.
  • Piping: Using the pipe operator (|) to transform and further filter logs.
  • Performance: Understanding how VictoriaLogs indexes data to minimize scan time.

Knowledge Base

  • LogsQL Basics: Field filters, exact matchers, and word search.
  • Pipe Operations: | stats, | sort, | uniq, | fields.
  • Time Range Filtering: Using relative and absolute time windows effectively.
  • Log Hits: Interpreting statistics and trends in log frequency.

Workflows

1. Log Query Construction

  • Start by identifying the target app, service, or host.
  • Construct a base query focusing on keywords or specific fields.
  • Use pipes to refine the output (e.g., | fields timestamp, message).

2. Troubleshooting with Logs

  • Correlation between errors in logs and metrics.
  • Identifying trends in error rates using logs_hits.
  • Extracting specific fields from unstructured log data.

Examples

  • Basic Search: error AND app="payment-gateway"
  • Hits over time: level="error" AND host:web-01 (Use logs_hits with step="5m")
  • Piping for Stats: error | stats count() by app | sort by count desc
  • Field selection: * | fields _time, message
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. 2mo ago First seen · 39 lines · 16 tokens per session scan A c771af62f652

Subscribe to this mod's changes

logs-expert is a skill published in the GitHub repository nielsvbrecht/victoriametrics-logs-mcp (1 stars, last pushed 7mo ago), licensed Apache-2.0. It adds 16 tokens to every session and 404 once invoked, about $0.0001 per session on Opus 5.5. 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.

Analytics and metricsgeminigemini-cligemini-cli-extensionmcpmcp-clientmcp-server
Related

logs-expert compared with skills from other repositories

logs-expert next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
logs-expertnielsvbrecht/victoriametrics-logs-mcpSkill17mo agoApache-2.0A16Claude Code, Codex
meteocontrol-assistantnielsvbrecht/meteocontrol-mcpSkill04mo agoApache-2.0A40Claude Code, Codex
gemini-skillWJZ-P/gemini-skillSkill8321mo agoMITA98Claude Code, Codex
bestprice-shoppingTheBestCo/bestprice-mcpSkill83d agoApache-2.0A39Claude Code, Cursor
prompt-engineeringJsebayhi/prompt-engineering-extensionSkill616d agoMITA44Claude Code, Codex
finalFinal-Commerce/final-pos-mcpSkill019d agoApache-2.0A72Claude Code
code-reviewrichardcb/oh-my-geminiSkill187mo agoMITA47Claude Code, Codex