Martin Fowler shows that in long-running multi-agent workflows the real cost isn’t parallel execution but context pollution in the orchestrator’s working memory. He recounts how status polling and redundant file orientation dumped massive transcripts into the main thread, competing for attention. He then proposes simple rules—like merging overlapping tasks and avoiding unnecessary polls—to keep only essential information in context.

This guide shows how to unlock Fable 5’s real power by setting up a local context folder, memory file, and reusable skills so the model remembers your business and workflows. It also explains the key /goal and /loop commands for multi-day, hands-off tasks and offers tactics to cut token costs by 60-80%.

The article shows how real-world agentic AI deployments can blow through budgets because multi-step workflows use 5–30× more tokens per task than simple chatbots. It breaks down four hidden cost layers—LLM inference with re-sent context, context rot, tool orchestration, and infrastructure—and offers strategies to curb runaway spending before your production bill arrives.

The article compares OpenAI’s Codex “Oracle” approach—using server-side compaction to maintain a single coherent thread—with Anthropic’s Claude “Firm” method of delegating tasks to multiple sub-agents. It breaks down trade-offs in cost, speed, coherence, and memory loss, and predicts a future hybrid of both strategies.

The article outlines five critical trends reshaping the role of data engineers as AI evolves into a more integrated and operational force by 2026. Emphasizing the need for unified data and AI infrastructures, it highlights the shift from data quantity to quality, the importance of real-time processing, and the necessity of handling multimodal data. Data engineers are urged to adapt their skills to build context-aware systems that can support the demands of AI agents.