Build open-source agent infrastructure

Build typed agent-app layers in dependency order

When layering open-source packages with typed contracts that must stay green at each step.

• · args: JSON object or string with phase configuration

• · JSON object matching declared schema

• · Model Context Protocol (MCP) servers
• · Package manager (pnpm/npm/bun) for CI

• · Workflow harness must inject phase(), agent(), parallel() globals
• · args must be a valid plain object (not a string) before phase execution

• · Phase exits early if any agent returns null or throws
• · Subsequent phases cannot recover from prior phase failure