feat: Conjecture engine (Hypothesis-style byte-buffer testing)#61
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Adds a Hypothesis-style testing engine that generates and shrinks at the byte level rather than the value level. Core: - ChoiceSequence: byte buffer with span annotations for smart shrinking - Strategy typeclass: interprets bytes as typed values (Nat, Bool, List, etc.) - Shrinker: byte-level operations (delete spans, halve bytes, zero spans) Features: - Parallel testing via IO.asTask with auto-fallback for <1000 tests - Binary search shrinking for numeric types (O(log n) vs O(n) halving) - Example database: persists failing cases across runs - Health checks: detects slow/problematic generators - Targeted PBT: score-guided evolutionary search
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Hypothesis-style byte-buffer generation and shrinking.
Shrinking at byte level eliminates per-type
Shrinkableinstances.ChoiceSequence: byte buffer + span annotationsStrategy α: bytes → typed valuesShrinker: delete/zero spans, halve bytesIO.asTask) with early termination, fallback for <1000 testsNat.shrinkToMinimal: binary search finds 50, not 64