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A custom harness built from necessity
FRACTAL's four tiers and the two gates between them. The decision it shows: a failed check goes back to the tier that produced it twice, then escalates to a person, rather than retrying until a model agrees with itself.

FRACTAL

A custom harness built from necessity

A BAA and SOC 2 ruled out Cursor and most agentic tooling, so I wrote the missing layer: four tiers, a Python state machine owning control flow, hard context resets, tier-based model routing, evals at the boundaries. Autonomy was never the goal. Being able to see where it went wrong, while it still mattered, was.