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Function-Aware Fill-in-the-Middle: Mid-Training for Coding Agent Foundation Models

Hugging Face Papers · 2026-07-16

Function-Aware Fill-in-the-Middle: Mid-Training for Coding Agent Foundation Models

Image: Hugging Face Papers

TIGER-Lab proposes Function-Aware Fill-in-the-Middle (FIM) as a mid-training step for coding agent foundation models.

Standard FIM trains a model to fill a gap in code, but this work makes the model aware of the surrounding functions and their signatures.

The goal is stronger foundation models for coding agents — the systems that read a repo, plan changes and write pull requests.

For developers, better coding foundations mean agents that understand a codebase's structure instead of guessing from isolated snippets.

It reflects the shift from chat-based coding assistants toward autonomous agents that operate across whole repositories.

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