hiharin

Protego — Development skill for Claude Code

Development community

Raise a shield — add input validation and tests around a risky path.

How to install Protego

Installs to ~/.claude/skills/hiharin-claude-spellbook-protego/SKILL.md

Terminal

mkdir -p ~/.claude/skills/hiharin-claude-spellbook-protego && curl -fsSL https://raw.githubusercontent.com/hiharin/claude-spellbook/HEAD/commands/protego.md -o ~/.claude/skills/hiharin-claude-spellbook-protego/SKILL.md

Restart Claude Code, or start a new session, for it to be picked up.

What Protego does

description: Raise a shield — add input validation and tests around a risky path argument-hint: "[function, endpoint, or path]"

Cast **Protego** on $ARGUMENTS.

Harden the code against bad input and misuse:

validate arguments at the boundary (type, range, shape, required fields)
fail fast with clear, actionable error messages
handle empty / null / malformed input explicitly
add defensive checks for the assumptions the code currently makes silently
add tests covering each new gu

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