# Challenging Deterministic Project List (2026-02-26)

Purpose:
- Identify legal but semantically hard tasks likely to expose deterministic generator limits.
- Continuously mine failure packets to create new backfill sprints.

Catalog file:
- `datasets/project_benchmarks/challenging_deterministic_projects_2026-02-26.jsonl`

Focus areas covered:
- financial invariants and replay safety
- distributed lock semantics and deadlock risk
- CRDT convergence and causal ordering
- saga compensation and timeout recovery
- policy explainability and precedence
- streaming out-of-order replay determinism
- schema evolution with CDC checkpoints
- high-contention rate limiting
- long-range build graph transactional execution
- semantic contract validation and remediation plans
- secure staged rollout/rollback workflows
- class-heavy cross-language codegen parity