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Native Cube

A collection of small, static cloud-native tools published with GitHub Pages.

Kubernetes Manifest Builder

Open /k8s-manifest-builder/ to configure an apps/v1 Deployment, StatefulSet, or DaemonSet and export it as YAML or JSON.

The form covers common workload, container, probe, resource, storage, scheduling, security, lifecycle, and rollout fields. The Additional manifest fields editor accepts a JSON object that is deep-merged into the generated resource for API fields not represented directly in the form.

Visual Subnet Calculator

Open /visual-subnet-calculator/ to split an IPv4 CIDR block into a visual, editable plan. Subnets can be split, joined, color-coded, annotated, exported as JSON, or shared through a URL. Standard IPv4, AWS VPC, and Azure VNet address reservation policies are supported.

YAML & JSON Formatter

Open /yaml-formatter/ to validate, format, and convert YAML or JSON entirely in the browser. The editor auto-detects the input format, reports syntax errors with line and column details, supports multi-document YAML, and can copy or download the formatted result.

The shorter /json-formatter/ alias redirects to this tool.

YAML parsing and serialization use the vendored js-yaml 4.1.0 browser bundle, distributed under the MIT license included with the tool.

## To preview locally

python3 -m http.server 8080
  • http://localhost:8080/k8s-manifest-builder/
  • http://localhost:8080/visual-subnet-calculator/
  • http://localhost:8080/yaml-formatter/

Quality and search checks

Run the repository SEO audit locally:

python3 scripts/seo-audit.py

The Lighthouse and SEO GitHub Actions workflow audits every canonical page on pull requests and pushes to main. It enforces minimum performance, accessibility, best-practices, and SEO scores together with lab thresholds for Largest Contentful Paint, cumulative layout shift, and total blocking time.

Google Search Console requires account-issued ownership verification. Follow SEARCH_CONSOLE.md to add the URL-prefix property, install the unmodified verification file, submit the sitemap, and request indexing for each canonical page.