GitHub Codespaces Efficiency

Use this skill as a lean entrypoint for GitHub Codespaces efficiency work. Inspect the repo, identify waste, and load only needed references.

If no .devcontainer/ exists yet, load references/codespaces.md and define a baseline before proceeding with the steps below.

Use This Skill When

• The user wants faster Codespaces startup or lower Codespaces spend.
• The repo has a .devcontainer/ or explicit Codespaces configuration questions.
• The user asks for devcontainer optimization, machine sizing, prebuild strategy, or idle-timeout guidance.
• The user is setting up Codespaces for the first time or needs help creating a new .devcontainer/ from scratch.

Load Only What You Need

• references/codespaces.md — devcontainer, machine-sizing, prebuild, idle-timeout guidance, and reporting.
• references/review-rubric.md — load only for review passes.

Core Workflow