Create pf-adversarial-review agent

[patternfly-jira-sync]

Agent that stress-tests components with edge-case inputs, unusual prop combos, and boundary conditions. Finds gaps in error handling.

AC:

• Agent exists in code-review plugin

• Generates and tests edge-case scenarios for a target component

• Reports unhandled errors and missing defensive code

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Jira Issue: PF-4183