opcode

Agent-first workflow orchestration engine exposed via MCP (SSE daemon). Define, execute, monitor, and signal workflows with 6 MCP tools. Supports DAG-based execution, 6 step types (action, condition, loop, parallel, wait, reasoning), 24+ built-in actions, ${{}} interpolation, reasoning nodes for human-in-the-loop decisions, and secret vault. Use when defining workflows, running templates, checking status, sending signals, or querying workflow history.