Guillaume Cardoen

This work builds and releases the GHAgentFiles dataset together with the open-source extraction tool cofee, identifying 27,717 repositories with coding agent files out of 165,281 candidates and extracting 142,294 context, skill and subagent file histories (401,873 file revisions across 185,795 commits, spanning 22 November 2022 to 1 July 2026), and it presents a preliminary observational analysis showing that coding agent files emerge around early 2025, peak in additions and modifications in early 2026, and that the generic AGENTS.md has become the most popular naming practice.

This work builds and releases the GHAgentFiles dataset together with the open-source extraction tool cofee, identifying 27,717 repositories with coding agent files out of 165,281 candidates and extracting 142,294 context, skill and subagent file histories (401,873 file revisions across 185,795 commits, spanning 22 November 2022 to 1 July 2026), and it presents a preliminary observational analysis showing that coding agent files emerge around early 2025, peak in additions and modifications in early 2026, and that the generic AGENTS.md has become the most popular naming practice.