1
Designing Long-Horizon Agent Loops
Build an agent loop that survives minutes-long turns and hundreds of tool calls — streaming, per-effort timeouts, checkpointing, and budgeting the 1M-token context.
Start lessonLong-Horizon Agentic Workflows & Sub-Agents
Build agents that run for hours: tool loops designed for minutes-long turns, parallel sub-agent delegation, and memory files that persist across sessions.
Lessons in this module
Follow the lessons sequentially for best understanding
2
Parallel Sub-Agent Delegation
Fable 5 excels at decomposing work across parallel sub-agents. Build an orchestrator that spawns, awaits, and merges sub-agent results — with effort and cost tiering.
Start lesson3
Memory Files: Persistence Across Sessions
Fable 5 is excellent at maintaining memory files — structured notes it reads and updates itself. Design the file layout, the tools, and the prompts that make agent memory reliable.
Start lessonKey skills
What you'll master in this module
Practical knowledge
Gain practical experience you can apply immediately
Expertise
Develop deeper domain expertise
Communication
Learn to communicate your knowledge effectively
Documentation
Create your own notes and documentation
Problem analysis
Learn systematic approaches to complex problems
Optimization
Optimize for performance and efficiency
Tips for success
How to get the most out of this module
1
Proceed step by step
Don't move on until you fully understand the previous lesson
2
Practice regularly
Spend daily time on the practical lesson exercises
3
Take notes
Write down key insights and your own thoughts
4
Ask questions
If something is unclear, ask the community for help
5
Test knowledge
Validate learning with exercises and quizzes
6
Share insights
Teach concepts to others to reinforce retention