investigate

investigate is a skill for Claude Code, Codex from vmkteam/claude-plugins. It costs 61 tokens per session (1,695 once invoked), scanned A, original, MIT.

An investigation workflow for finding the cause of a software problem across error tracking, metrics, logs, and infrastructure data sources. It is for cases where there is a symptom but the cause is not yet known.

In plain words
What is it for?
Checking service health, defining the affected time range and service, searching Sentry, Prometheus, Loki, Kibana, and Nomad, and collecting evidence about a production problem.
Why use it?
It gives developers a repeatable way to narrow down issues such as slow APIs, server errors, or failures after a deployment. It avoids starting a full incident-management process when a focused investigation is enough.

Skill for Claude CodeCodex

Part of the vmkteam-developer plugin — 35 skills shipped together

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.

agentmods
npx agentmods add skills/vmkteam/claude-plugins/investigate
Any agent
npx skills add vmkteam/claude-plugins --skill investigate
Clone the repo
git clone --depth 1 https://github.com/vmkteam/claude-plugins

Made for: Claude Code, Codex.

Or install vmkteam-developer, the plugin that ships this one along with the rest of its 35 skills.

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 investigate

README.md
[![agentmods](https://agentmods.dev/badge/skills/vmkteam/claude-plugins/investigate.svg)](https://agentmods.dev/skills/vmkteam/claude-plugins/investigate)
Your own site
<a href="https://agentmods.dev/skills/vmkteam/claude-plugins/investigate"><img src="https://agentmods.dev/badge/skills/vmkteam/claude-plugins/investigate.svg" alt="Measured on agentmods" height="20"></a>
Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,695 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00061 $0.01695
Opus 5 $0.00030 $0.00847
Sonnet 5 $0.00012 $0.00339
Haiku 4.5 $0.00006 $0.00169

Measured 4d ago against content hash b5565fe1996a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

investigate 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 4d 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/developer/skills/investigate/SKILL.md · 192 lines

How it starts

The opening of the file, as written. The whole thing — 192 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/investigate — Расследование инцидента

Полное расследование инцидента. Задействует все доступные data source скиллы по стадии проекта. Конкретные подключения из .claude/memory/project-index.md.

Триггер

  • "API тормозит"
  • "500 ошибки на /rpc/"
  • "у пользователя не работает X"

Для полного workflow production-инцидента с HITL, mitigation и post-mortem — использовать /incident.

  • "что-то сломалось после деплоя"

Входные данные

  • Описание проблемы (свободный текст)
  • Временной диапазон (опционально, default: 1h)
  • Проект/сервис (опционально, default: все)

Алгоритм

1. Определить scope

Из описания извлечь:

  • Время: когда началось? default statsPeriod=1h
  • Сервис: какой именно? Если неизвестно — все из project-index
  • Endpoint/метод: конкретный RPC method или URL?
  • Ключевые слова: для поиска в Sentry и логах

2. Проверить здоровье (скилл /api-health)

Первым делом — жив ли сервис?

pcurl @{api_prod_profile} https://{api_prod_host}/{rpc_endpoint} -s -L -X POST \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","method":"{known_method}","params":{},"id":1}' \
  -w '\nHTTP %{http_code} | Total: %{time_total}s | TTFB: %{time_starttransfer}s\n'

Если не отвечает — сразу проверять Nomad (шаг 6).

3. Sentry: ошибки (скилл /sentry)

Параллельно:

  • Unresolved issues за период, по частоте
  • Новые issues (firstSeen в периоде)
  • По ключевым словам из описания проблемы

Top-3 issues → получить latest event (stacktrace, breadcrumbs).

4. Prometheus: метрики (скилл /prometheus)

Параллельно:

  • RPC error rate и HTTP 5xx
  • Latency (avg по методу, top-10 медленных)
  • Throughput (RPS) — сравнить с обычным уровнем
  • Saturation: goroutines, memory, DB connections

5. Loki: приложенческие логи (скилл /loki)

  • Ошибки по сервису (level="ERROR")
  • По конкретному методу если известен
  • Медленные запросы (durationMS > 500)
  • Ошибки с текстом (err!="<nil>")

6. Nomad: оркестрация (скилл /nomad)

Проверить — не инфраструктурная ли причина:

  • OOM kills (increase(nomad_client_allocs_oom_killed[{period}]))
  • Restarts (increase(nomad_client_allocs_restart[{period}]))
  • Blocked allocations
  • Node resources (CPU, memory)

Read the full file on GitHub · 192 lines

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. 4d ago First seen · 192 lines · 61 tokens per session scan A b5565fe1996a

Subscribe to this mod's changes

investigate is a skill published in the GitHub repository vmkteam/claude-plugins (7 stars, last pushed 4mo ago), licensed MIT. It adds 61 tokens to every session and 1,695 once invoked, about $0.0003 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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