---

name: testing-and-validation description: "Run and interpret PettingZoo compliance, seed, render, max-cycles, save-observation, and safe native validation checks." disable-model-invocation: true metadata: disco-role: operating license: NOASSERTION

Testing And Validation

Use this sub-skill when an agent needs to run or interpret PettingZoo validation: api_test, parallel_api_test, seed checks, render checks, max_cycles checks, save-observation checks, CI-safe test selection, or failures from compliance helpers.

Read Or Run

• Read compliance tests when choosing a PettingZoo helper, setting bounded cycles, building CI commands, or interpreting pass signals and common assertions.
• Read native test selection when deciding whether a repo-native test or example is safe, optional-extra gated, GUI/ROM gated, or too heavy for default validation.
• Read troubleshooting when a validation failure mentions space identity, live-agent keys, revived agents, action masks, seeding, render return types, max_cycles, or excessive runtime.
• Run run_compliance_checks.py when you need a safe CLI around installed pettingzoo.test helpers for a module factory such as my_pkg.my_env_v0:parallel_env.

Route Elsewhere

• For fixing a custom AEC or Parallel environment implementation after a test identifies the broken contract, use ../custom-environments/SKILL.md.
• For wrapper ordering, conversion wrappers, AgentSelector, save_observation, or utility-wrapper behavior, use ../wrappers-and-utilities/SKILL.md.
• For basic rollout loops, action sampling, reset/step lifecycle, or headless smoke checks that are not compliance tests, use ../use-environments/SKILL.md.
• For missing optional family dependencies, Atari ROM requirements, or display/rendering prerequisites, use ../environment-families/SKILL.md.

Default Stance

Start with bounded, headless API and seed checks. Keep render, human render mode, max_cycles, performance benchmarks, observation-image saving, optional-family tests, ROM-backed environments, and training examples opt-in unless the user explicitly asks for broader validation.