Can one canary check depend on the result of another?

Yes, the skill provides patterns for using the 'outputs' variable to create assertions based on the results of previous named checks.

Can I use this for Kubernetes health monitoring?

Yes, it includes specific snippets and patterns for asserting the health of Kubernetes resources using the k8s.isHealthy helper.

Does this skill bypass built-in check failures?

No, these tests are designed to add specific assertions on top of built-in logic; they do not bypass standard check failures.

What languages does this skill support for test expressions?

The skill supports CEL (Common Expression Language), JavaScript, and Go templates for writing health check logic.

How does it handle optional JSON fields in responses?

The skill utilizes null-safe access patterns like the '.?' operator combined with 'orValue()' to ensure tests don't crash when optional fields are missing.

Mission Control Canary Test Writer

Name: Mission Control Canary Test Writer
Author: flanksource

byflanksource

0•

Security & Testing

Generates precise test blocks and boolean assertions for Mission Control canary health checks across HTTP, Kubernetes, and system outputs.

This skill streamlines the creation of robust infrastructure monitoring by providing domain-specific guidance for writing canary test expressions. It enables developers to generate accurate pass/fail conditions using CEL, JavaScript, or Go templates, ensuring system reliability through detailed assertions on HTTP status codes, JSON payloads, Kubernetes resource health, and execution outputs. By automating the implementation of null-safe access patterns and cross-check dependencies, the skill helps maintain high-quality observability without the syntax overhead of the Canary Checker specification.

Key Features

010 GitHub stars

02Validates SSL certificate age and HTTP header requirements

03Generates CEL, JavaScript, and Go template test assertions

04Supports complex Kubernetes health and JUnit summary logic

05Implements null-safe access patterns for JSON and list responses

06Handles multi-step dependencies using named check outputs

Use Cases

01Creating sequential canaries where checks depend on data from previous steps

02Defining health checks for microservices that require specific JSON response fields

03Monitoring Kubernetes cluster resource health using specialized k8s assertions

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add flanksource/claude-code-plugin write-canary-tests

For use in Claude.ai and ChatGPT

Download Skill