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YAML

YAML guides on the syntax and its silent type traps, anchors and aliases for DRY config, GitHub Actions workflows, and safe loading in Python with PyYAML.

Apr 16, 2026·9 min read

What is YAML? Syntax, Types, and the Gotchas That Bite Everyone

What is YAML? The syntax and types behind Kubernetes, GitHub Actions and Docker Compose, plus silent errors like the Norway problem that hit production.

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Apr 16, 2026·7 min read

YAML Anchors and Aliases — Write DRY Config Files

YAML anchors (&) and aliases (*) let you define a block once and reuse it anywhere. The cure for copy-paste in long Kubernetes manifests and CI configs.

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Apr 16, 2026·8 min read

YAML in GitHub Actions — A Field Guide to Workflow Syntax

YAML in GitHub Actions: how workflow files are structured, the quoting and indentation mistakes that make CI flaky, and patterns for jobs you can rely on.

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Apr 16, 2026·8 min read

Parsing YAML in Python — PyYAML, ruamel.yaml, and Safe Loading

Parse YAML in Python safely: why yaml.load() on untrusted input is dangerous, using safe_load instead, round-tripping with comments, when ruamel.yaml fits.

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