observability-logs-search

observability-logs-search is a skill for Claude Code, Codex from aspectrr/deer. It costs 42 tokens per session (1,333 once invoked), scanned A, original, MIT.

A procedure for searching application and infrastructure logs with ES|QL, Elastic’s query language for observability data. Logs are time-stamped records of what software and servers did.

In plain words
What is it for?
Use it to investigate error spikes, search for anomalies, measure log volume over time, or focus on a particular service, container, or incident.
Why use it?
It helps narrow a large stream of log records into a small set of useful errors, trends, or unusual events during an investigation.

Skill for Claude CodeCodex

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

Good fit Use it to investigate error spikes, search for anomalies, measure log volume over time, or focus on a particular service, container, or incident.

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Install with agentmods
npx agentmods add skills/aspectrr/deer/observability-logs-search
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 aspectrr/deer --skill observability-logs-search
Clone the repo
git clone --depth 1 https://github.com/aspectrr/deer

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 observability-logs-search

README.md
[![agentmods](https://agentmods.dev/badge/skills/aspectrr/deer/observability-logs-search.svg)](https://agentmods.dev/skills/aspectrr/deer/observability-logs-search)
Your own site
<a href="https://agentmods.dev/skills/aspectrr/deer/observability-logs-search"><img src="https://agentmods.dev/badge/skills/aspectrr/deer/observability-logs-search.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,333 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 $0.00042 $0.01333
Opus 5 $0.00021 $0.00666
Sonnet 5 $0.00008 $0.00267
Haiku 4.5 $0.00004 $0.00133

Measured 8d ago against content hash d55c32912224, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

observability-logs-search 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 8d 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.

deer-cli/internal/skill/defaults/observability-logs-search/SKILL.md · 101 lines

How it starts

The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Search and filter logs to support incident investigation. The workflow mirrors Kibana Discover: apply a time range and scope filter, then iteratively add exclusion filters (NOT) until a small, interesting subset of logs remains. Use ES|QL only (POST /_query); do not use Query DSL.

Parameter conventions

Parameter Type Description
start string Start of time range (Elasticsearch date math, e.g. now-1h)
end string End of time range (e.g. now)
kqlFilter string KQL query string to narrow results
limit number Maximum log samples to return (e.g. 10–100)
groupBy string Optional field to group the histogram by (e.g. log.level, service.name)

Context minimization

Keep the context window small. In the sample branch of the query, KEEP only a subset of fields; do not return full documents by default.

Recommended KEEP list for sample logs: message, error.message, service.name, container.name, host.name, container.id, agent.name, kubernetes.container.name, kubernetes.node.name, kubernetes.namespace, kubernetes.pod.name

The funnel workflow

You must iterate. Do not stop after one query. Keep excluding noise with NOT until fewer than 20 log patterns remain.

  1. Round 1 — broad: Run a query with only the scope filter and time range.
  2. Inspect: Look at the histogram, sample messages, and categorized patterns.
  3. Round 2 — exclude noise: Add NOT clauses to the KQL filter for dominant noise patterns.
  4. Repeat: Keep adding NOTs until fewer than 20 log patterns remain.
  5. Pivot (optional): Once the funnel isolates a specific entity, run one more query focused on that entity.

Read the full file on GitHub · 101 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. 8d ago First seen · 101 lines · 42 tokens per session scan A d55c32912224

Subscribe to this mod's changes

observability-logs-search is a skill published in the GitHub repository aspectrr/deer (404 stars, last pushed 4mo ago), licensed MIT. It adds 42 tokens to every session and 1,333 once invoked, about $0.0002 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 2026-08-30.