edonadei
Community indexed
Caliper
Know if your agent skill actually works. A lightweight evaluation harness that tracks a success rate across Claude Code, Codex, Pi, and Hermes.
Overview
Lightweight evaluation harness for agent skills to track success rates across multiple agent runtimes.
Read full documentation
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Caliper: Know if your agent skill actually works
Caliper is a lightweight evaluation harness for agent skills. Write a short spec of what "good" looks like, run it again and again, and get a success rate you can track. It also runs every task without the skill, so you learn whether the skill is doing the work or the base agent would have passed anyway. Works with the agent you already use: Claude Code, Codex, Pi, or Hermes.
Teach your agent to evaluate:
npx skills@latest add edonadei/caliper
Or run it yourself:
caliper run commit-commands.eval.yaml --k 3 --baseline
You write a spec, a few lines of YAML describing what "working" means, which you hand-write or have /grill-skill generate for you. With --baseline, Caliper runs each task with and without the skill and diffs the two runs task by task:
Agent skills are hard to test. A skill that works on your machine, on this prompt, today, might fail tomorrow after a model update or a one-line prompt edit. Caliper makes reliability measurable: define what success looks like, run the skill repeatedly, and get a success rate you can track over time.
Use Caliper to answer questions like:
- Did my prompt edit actually improve the skill?
- Is the skill doing the work, or would the base agent pass without it?
- Does it still pa
View original text
# Caliper: Know if your agent skill actually works
[](https://pypi.org/project/caliper-eval/)
[](https://pypi.org/project/caliper-eval/)
[](https://skills.sh/edonadei/caliper)
Caliper is a lightweight evaluation harness for agent skills. Write a short spec of what "good" looks like, run it again and again, and get a **success rate** you can track. It also runs every task _without_ the skill, so you learn whether the skill is doing the work or the base agent would have passed anyway. Works with the agent you already use: Claude Code, Codex, Pi, or Hermes.
**Teach your agent to evaluate:**
```bash
npx skills@latest add edonadei/caliper
```
**Or run it yourself:**
```bash
caliper run commit-commands.eval.yaml --k 3 --baseline
```
You write a spec, a few lines of YAML describing what "working" means, which you hand-write or have `/grill-skill` generate for you. With `--baseline`, Caliper runs each task with and without the skill and diffs the two runs task by task:
<!-- Terminal output of `caliper compare`, rendered to SVG so the box-drawing
table stays aligned on every screen. Regenerate with:
python docs/render_readme_samples.py -->
---
Agent skills are hard to test. A skill that works on your machine, on this prompt, today, might fail tomorrow after a model update or a one-line prompt edit. Caliper makes reliability measurable: define what success looks like, run the skill repeatedly, and get a success rate you can track over time.
Use Caliper to answer questions like:
- Did my prompt edit actually improve the skill?
- Is the skill doing the work, or would the base agent pass without it?
- Does it still paReview the source
Price & running costs
- Get the skill
- Price unconfirmed
- Run it
- Requirements have not been confirmed. Check the source for agent, API and service charges.
- License
- MIT
- Price unconfirmed
- We have not confirmed a price for this skill. Existing source and install links remain available.
Free to get does not mean free to run. Price labels are not safety ratings. Submit pricing information →
Source structure unverified
A repository listing is not proof of an installable skill. Review its instructions before proposing any installation.
Review before install: Avoid automatic install
License: MIT
- Dependency or permission surface needs review
- Permission surface may require sandboxing
- Low GitHub adoption signal
- Quality score needs review
- Permission surface needs review: secrets or environment access, shell or command execution
- GitHub adoption: 36 GitHub stars
- Stars/forks activity: 36 stars, 4 forks; issue activity unavailable in current metadata
- Dependency/runtime risk: command execution surface, credential or environment access
- Permission surface: secrets or environment access, shell or command execution
Listed tools are metadata hints, not tested compatibility. Agent prompts are suggested handoffs.
Start with one small task
- 1Read the source. Confirm the input, expected output, dependencies and permissions.
- 2Ask your agent for a plan. Approve setup and any costs before running a small isolated test.
- 3Check the output and changed files. Report only what actually ran; keep the source revision for reproduction.
Check the source for dependencies, API keys and third-party costs. A public repository does not mean every service is free.
Source & usage notes
Indexed
Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.
- Source repository
- edonadei/caliper
- License
- MIT
- Version
- 1.0.0
- Last GitHub push
- Jul 26, 2026
- Registry updated
- Sep 1, 2026
- Instruction path
- Source structure unverified
Version reported in registry metadata; check source releases before relying on it.
Quality
69/100
Promising
Trust
65/100
Sandbox only
Audit
77/100
Needs review
- Dependency or permission surface needs review
- Permission surface may require sandboxing
- Low GitHub adoption signal
- Quality score needs review
- Permission surface needs review: secrets or environment access, shell or command execution
- GitHub adoption: 36 GitHub stars
- Stars/forks activity: 36 stars, 4 forks; issue activity unavailable in current metadata
- Dependency/runtime risk: command execution surface, credential or environment access
- Permission surface: secrets or environment access, shell or command execution
- Verified installs
- —
- Outcomes
- —
Copies are not installs. Installation counts require a reported successful installation; they are not a blanket quality guarantee.
Agent access
This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.
More details
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}For the creator
Listing source
Community indexed
This listing was indexed from public sources and is not marked official until a maintainer claim is approved.
- Creator
- edonadei
- Source
- edonadei/caliper
- Indexed by
- OpenAgentSkill community index
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