ResearchResearch paperEvaluation & Benchmarks · Safety & Alignment · Efficiency & Inference1 source · Oct 6, 2026

Finding Blind Spots in AppWorld and WorkArena Task Verifiers

Execution-based task verifiers decide whether an agent succeeded.

Key points

  • We audit shipped AppWorld and WorkArena verifiers with source-informed mutation tests.
  • In AppWorld, duplicating a non-idempotent write creates an extra record while preserving every checked field value.
  • A cardinality patch applied to checker copies after the census makes all six cells fail while preserving valid controls.
  • Other checker-PASS cases are effect-correct degeneracies.

Sources (1)

Extractive summary: sentences quoted from the sources.

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