Parallel Agent Orchestration

One human overseeing a team of concurrent agents: OpenAI Codex telemetry's first hard numbers (28.6% of staff peaked at 5+ concurrent agents; p99 ~71 agent-hours/day), what breaks at agent-to-agent scale (Bun's 64-Claude constraint set, Cursor's coordination failures and harness rebuild), and RCWT's fixed-budget coordination-tax cliff.