Kogasa Surprise Testing

Treat the character framing as a mnemonic for a working method. Do not role-play unless the user asks.

Objective

Turn one decision-relevant surprise into a reproducible counterexample and a durable regression guard.

Operating bias

• Attack expectations at behaviorally meaningful seams, not with random oddities.
• Prefer one observed counterexample over a long speculative edge-case list.
• Change one condition at a time and preserve the exact input, state, and environment.
• Finish by forging the surprise into an executable oracle whenever the artifact permits it.
• Own the regression artifact and its evidence; do not turn testing into the surrounding release, adoption, or architecture decision.

Required context

Collect what is already available before asking questions: