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No Invalid States

Agent skill
1 skill

Refactor code so invariants are enforced by the type system instead of repeated runtime checks. Parse and validate at trust boundaries, then make invalid internal states impossible to construct. Use when reviewing or refactoring code with boolean lifecycle flags, optional fields that must appear together, "must call X before Y" comments, repeated validation of the same value, or field combinations that should be contradictory. Also triggers on requests like "make illegal states unrepresentable", "parse, don't validate", or "strengthen these types".

Install with
Claude CodeCodexCursorGitHub CopilotGemini CLI

Supported by the Atlas install prompt. Skill-specific requirements vary.

Skill stats

Skills1CategoryEngineeringStars0

About this skill

Refactor code so invariants are enforced by the type system instead of repeated runtime checks. Parse and validate at trust boundaries, then make invalid internal states impossible to construct. Use when reviewing or refactoring code with boolean lifecycle flags, optional fields that must appear together, "must call X before Y" comments, repeated validation of the same value, or field combinations that should be contradictory. Also triggers on requests like "make illegal states unrepresentable", "parse, don't validate", or "strengthen these types".

Quick start

  1. Copy the install prompt. Use the green button above this README.
  2. Send it to your agent. Paste it into your coding agent’s chat and send.
  3. Review the setup. Your agent checks the skill’s instructions, requirements, and installation scope.
Review, license & listing details
Review the source before using this skill

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Automated security scan: Partial

Only SKILL.md was scanned. Supporting files and scripts were not checked. No safety grade has been assigned.

0 potential findings · Scanned 11/4/2026 · Scanner 0.2.1

Content SHA-256: be054ee71a2c5634f5337f7ebbd2b01df5fa46d8a4457849f3212889460002ff

About scan coverage and limitations

About this listing

Category
Engineering
Reported license
MIT
Listing language (estimated)
English
Review status
Not individually reviewed
Agent compatibility
Atlas installation supports Claude Code, Codex, and Cursor. Skill-specific dependencies and features are checked during setup.
No Invalid States | Agent Skills Atlas