exploring-llm-evaluations

exploring-llm-evaluations is a skill for Claude Code, Codex from PostHog/ai-plugin. It costs 127 tokens per session (4,349 once invoked), scanned A, original, no licence file.

An analysis guide for AI observability evaluations, which score or classify AI generations. It covers rule-based checks, LLM-based judging, and sentiment checks on user messages.

In plain words
What is it for?
Use it to find evaluations, review their settings, run them on specific generations, query individual results, and create summaries for boolean results.
Why use it?
It helps you inspect how evaluations are configured and understand the results they produce for AI responses.

Skill for Claude CodeCodex

Part of the posthog plugin — 51 skills, 3 commands, 1 agent, 2 hooks, 1 MCP server 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/posthog/ai-plugin/exploring-llm-evaluations
Any agent
npx skills add PostHog/ai-plugin --skill exploring-llm-evaluations
Clone the repo
git clone --depth 1 https://github.com/PostHog/ai-plugin

Made for: Claude Code, Codex.

Or install posthog, the plugin that ships this one along with the rest of its 51 skills, 3 commands, 1 agent, 2 hooks, 1 MCP server.

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 exploring-llm-evaluations

README.md
[![agentmods](https://agentmods.dev/badge/skills/posthog/ai-plugin/exploring-llm-evaluations.svg)](https://agentmods.dev/skills/posthog/ai-plugin/exploring-llm-evaluations)
Your own site
<a href="https://agentmods.dev/skills/posthog/ai-plugin/exploring-llm-evaluations"><img src="https://agentmods.dev/badge/skills/posthog/ai-plugin/exploring-llm-evaluations.svg" alt="Measured on agentmods" height="20"></a>
Per session 127 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,349 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00127 $0.04349
Opus 5 $0.00063 $0.02174
Sonnet 5 $0.00025 $0.00870
Haiku 4.5 $0.00013 $0.00435

Measured 4d ago against content hash ed1b63bcdd34, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

exploring-llm-evaluations 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.

skills/exploring-llm-evaluations/SKILL.md · 405 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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 · 405 lines · 127 tokens per session scan A ed1b63bcdd34

Subscribe to this mod's changes

exploring-llm-evaluations is a skill published in the GitHub repository PostHog/ai-plugin (80 stars, last pushed yesterday), with no licence file. It adds 127 tokens to every session and 4,349 once invoked, about $0.0006 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.

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