The final part of the divvy-forge series: wiring TrueForge deployment, discovering the real agent manifest API through trial and error, fixing coordinator prompt flow so subagents run silently, and watching the agent open a real GitHub PR with coordinator reasoning, a unified diff, and subagent findings.

How I built two MCP tool servers — divvy-reader and market-data-fetcher — that give a TrueForge agent live access to a GitHub portfolio and real stock fundamentals. Includes a walkthrough of the raw MCP protocol, BeautifulSoup scraping, and the yfinance fallback.

How I designed the coordinator and subagent prompts for divvy-forge as versioned markdown files, embedded subagent instructions inline, defined strict output contracts, and used promptfoo evals to catch three real prompt bugs before a single live agent run.