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Creating Online Evaluations

Category: General  ·  Sub-category: hello-world-templates  ·  Last updated:
Author continuously-running online evaluations in PostHog AI observability, grounded in real failure modes you've identified. Use when the user wants evaluations that automatically score new generations or whole traces going forward — "create an eval to catch X", "continuously check that responses do Y", "turn these failures into evals". Covers letting the explored data decide how many evals to create, proposing that set for the user to pick, choosing the target and eval type (hog / llm_judge / sentiment), configuring a provider and model for an llm_judge eval (a provider key gates enabling, not creation), scoping which generations trigger it via conditions, creating disabled, verifying scope, and enabling. Proposes a sentiment eval when no failure mode is worth catching. Finding and ranking the failure modes worth evaluating is its own job — use exploring-ai-failures first. To debug or manage evaluations that already exist, use exploring-llm-evaluations.
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From the source SKILL.md

An online evaluation automatically scores either each matching $ai_generation or the whole trace containing it, until disabled. A good eval comes from a real failure mode you've found in production traffic, not from a guess or a generic metric like "hallucination" or "helpfulness". This skill starts once those failure modes are identified and turns them into scoped, continuously-running evals.

What this skill does

Creating Online Evaluations is a community-contributed Claude Code skill in the hello-world-templates sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/creating-online-evaluations/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the user wants evaluations that automatically score new generations or whole traces going forward — "create an eval to catch X", "continuously check that responses do Y", "turn these failures into evals". Covers letting the explored data decide how many evals to create, proposing that set for the user to pick, choosing the target and eval type (hog / llm_judge / sentiment), configuring a provider and model for an llm_judge eval (a provider key gates enabling, not creation), scoping which generations trigger it via conditions, creating disabled, verifying scope, and enabling.

Who uses this skill

The Creating Online Evaluations Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 196,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/creating-online-evaluations
curl -L https://claudskills.com/skills/creating-online-evaluations/SKILL.md \
  -o ~/.claude/skills/creating-online-evaluations/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/creating-online-evaluations/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/creating-online-evaluations/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\creating-online-evaluations\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Creating Online Evaluations Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/creating-online-evaluations/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Creating Online Evaluations skill do?
Author continuously-running online evaluations in PostHog AI observability, grounded in real failure modes you've identified. Use when the user wants evaluations that automatically score new generations or whole traces going forward — "create an eval to catch X", "continuously check that responses do Y", "turn these failures into evals". Covers letting the explored data decide how many evals to create, proposing that set for the user to pick, choosing the target and eval type (hog / llm_judge / sentiment), configuring a provider and model for an llm_judge eval (a provider key gates enabling, not creation), scoping which generations trigger it via conditions, creating disabled, verifying scope, and enabling. Proposes a sentiment eval when no failure mode is worth catching. Finding and ranking the failure modes worth evaluating is its own job — use exploring-ai-failures first. To debug or manage evaluations that already exist, use exploring-llm-evaluations.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Creating Online Evaluations skill?
Use Creating Online Evaluations when your Claude Code task falls under the General category — specifically in the hello world templates area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Creating Online Evaluations" or describe the task and let Claude pick). Browse related skills at /category/general/.
What is a Claude Code skill and how does the Creating Online Evaluations skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Creating Online Evaluations is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
PostHog. (2026). Creating Online Evaluations [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/creating-online-evaluations/
BibTeX
@misc{creating-online-evaluations-2026,
  author    = {PostHog},
  title     = {Creating Online Evaluations [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/creating-online-evaluations/}
}

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Security scan

Grade A · scanned 2026-09-28 — free static scan against the OWASP Agentic Skills Top 10.

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