agentsop-state-reducer
From the author
Tool skill for declaring reducers on LangGraph state keys so parallel writes merge instead of crashing. Activates whenever a coder agent designs a StateGraph with parallel branches, fan-out via Send, multi-agent topologies, or whenever a run raises `InvalidUpdateError: At key '<k>': Can receive only one value per step`. Encodes the rule "every state key is single-writer or has a reducer — nothing in between."
Install
npx skills add agentsope/SkillAlchemy --skill agentsop-state-reducer -a claude-code
Installs to .claude/skills/agentsop-state-reducer/ · Each command fetches the skill straight from GitHub with the open skills CLI.
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