ResearchResearch paperReasoning & Planning1 source · Oct 11, 2026

CodeWalk: Generating Coding Benchmarks by Walking a Problem Graph

We formulate problem generation as code composition: verified atomic problems are combined into level-$N$ tasks, and a task is kept only if every atomic problem remains unsolved and a joint reference solution passes the same check used at evaluation time.

Key points

  • High-quality coding problems are expensive to collect.
  • In this work, we show that new coding problems can be created at almost no cost by composing existing ones.
  • We instantiate this approach in four coding settings: multi-bug repair, proof completion, complexity analysis, and clone equivalence.
  • The generated tasks are also useful as training data: rejection-sampling fine-tuning on them improves Qwen3.5-9B at every composition level.

Sources (1)

  • [1]CodeWalk: Generating Coding Benchmarks by Walking a Problem Graph
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 11, 04:57 AM
    We formulate problem generation as code composition: verified atomic problems are combined into level-$N$ tasks, and a task is kept only if every atomic problem remains unsolved and a joint reference solution passes the same check used at evaluation time.
    High-quality coding problems are expensive to collect.

Extractive summary: sentences quoted from the sources.

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