BUILDING AGENTS: WHEN TO FOLD SUBAGENTS INTO YOUR MAIN AGENT LOOP

Summary from the TLDR Dev newsletter

Folding routers, planners, and domain specialists into a single agent loop can reduce lossy handoffs, cost, and latency when skills and tool search load context on demand. Anthropic describes migration patterns and evaluations for deciding which boundaries to remove. Separate agents still help with independent parallel work, verification, permission boundaries, and measurable context overload.