ek-dev-agents

Evaluate AI agent performance using cost per successful task and trajectory reliability metrics.

Updated Jun 23, 2026
One-click install
npx skills add https://github.com/thorwhalen/ek --skill ek-dev-agents
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: ek-dev-agents
Source: https://github.com/thorwhalen/ek/tree/main/skills/ek-dev-agents
Command: npx skills add https://github.com/thorwhalen/ek --skill ek-dev-agents

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill addresses the complexity of evaluating AI agents by shifting the focus from token-based costs to cost-per-successful-task, ensuring reliable and economically sound agent performance.

Core Features & Use Cases

  • Cost-Sensitive Metrics: Implements trajectory and tool-call metrics that account for the specific cost of errors in agent arguments.
  • Reliability Estimation: Provides pure functions for pass-at-k and pass-hat-k to distinguish between capability and production-grade reliability.
  • Regression Gating: Uses variance-aware statistical gates to prevent regressions in agent performance across stochastic trials.

Quick Start

Use the ek-dev-agents skill to initialize a new agent evaluation suite with cost-sensitive metrics and a regression gate for your current task set.

Frequently Asked Questions about ek-dev-agents

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I measure AI agent performance using cost per successful task?▼

Agent performance is measured by tracking trajectory reliability and calculating the cost per successful task, shifting focus from raw token usage to economically sound outcomes.

What is pass-at-k and pass-hat-k reliability estimation for LLM agents?▼

Reliability estimation uses pass-at-k and pass-hat-k pure functions to distinguish between an agent's base capability and its production-grade reliability across stochastic trials.

How do I prevent regressions in LLM agent evaluation across stochastic trials?▼

Regression gating prevents performance regressions by applying variance-aware statistical gates to stochastic trial groups, ensuring consistent agent evaluation results across tests.

Does LLM-as-judge validation work with cost-aware evaluation harnesses?▼

LLM-as-judge validation pipelines integrate with cost-aware evaluation harnesses to assess tool-call grammars and measure the specific cost of errors in agent arguments.

What is variance-aware regression testing for AI agent trajectories?▼

Variance-aware regression testing groups stochastic trials to analyze cost-sensitive errors, preventing false positives when evaluating agent trajectory reliability and performance.

Can I use this skill to initialize an agent evaluation suite for tool-call grammars?▼

You can initialize a new agent evaluation suite with cost-sensitive metrics and a regression gate, directly evaluating tool-call grammars and argument error costs.