Agent skills extend AGENTS.md to specialized domains and tasks without filling everyone's context all the time.
See standard at: https://agentskills.io/
Rather than lengthening AGENTS.md, consider adding a new skill and comitting it to git for everyone to benefit from.
Skills matching .agents/skills/*.local are not committed to git, use this
directory for personal skills.
NOTE: .claude/skills is symlinked to this directory, all other agents
should discover .agents/skills automatically.