9 files for Claude Code, Codex and OpenCode: a2a-client, a2a-jakarta-sut, a2a-java-sut, a2a-python-sut and 5 more — 1,476 tokens loaded in every session.
AGENTS.md A 1,476 tok .agents/skills/a2a-client/SKILL.md A 100 tok .agents/skills/a2a-jakarta-sut/SKILL.md C 54 tok .agents/skills/a2a-java-sut/SKILL.md C 52 tok .agents/skills/a2a-python-sut/SKILL.md C 52 tok .agents/skills/diagnose-failure/SKILL.md B 60 tok .agents/skills/learn-requirement/SKILL.md A 63 tok .agents/skills/run-tck/SKILL.md A 50 tok .agents/skills/update-a2a-spec/SKILL.md A 52 tok These files are a2aproject/a2a-tck's own configuration — they tell Claude Code, Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.