Deep Grill: Two-Phase Plan Interrogator

Deep-grill ends with a written decision record, so a resolved requirement stays settled instead of getting relitigated in a later session.

Most build failures are not the model failing to write code - they are requirements that were never specified. Deep-grill kills that failure before anything exists, in two phases:

1. Clarify - walk the decision tree, resolve every upstream choice before its downstream ones, until no unspecified requirement would change what gets built.
2. Adversary - once the plan is resolved, attack it: assumptions, failure modes, weak premises, unstated risks. Break it on paper before reality breaks it for real.

It is domain-adaptive: it detects whether you are grilling a feature plan, an infrastructure change, a fiction draft, or a strategic decision, and grills on what actually matters for that domain. It ends by writing a single decision record - the design, the spec, and the surviving risks in one file.

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