ETF Agent / Notes

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ETF Agent · NotesUnderstanding agents through real engineering.

How complex agents run, why their architecture evolves, and how AI-assisted engineering delivers working systems.

Start with the six-layer map →
Browse all articles

Modules · How it works

Follow a request through tools, context, recovery and publication.

Explore modules

Architecture · Why it works

Understand ownership, authorization and sustainable evolution.

Explore architecture

AI engineering · How we build

From specs and evidence to validated task outcomes.

Explore engineering

ESSENTIAL READING · START HERE

01 / THE SYSTEM MAPSix-layer request lifecycle V3Follow a question through admission, context, Main and subagents, optional tools, Publication and the user interface.Read the complete architecture →02 / THE DECISION MAPNine architecture principlesUnderstand who owns semantics, permission, effects, recovery and the complexity of long-lived systems.Explore the core principles →

SELECTED ARTICLES

Fresh perspectives

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ENGINEERING OCT 26Why did one Subagent change block a day of work?How scattered ownership and cross-cutting changes raise runtime maintenance costs.Read article ARCHITECTURE OCT 26What should stay stable—and what should change?A different evolution strategy for Child, Memory, and Provider.Read article RESEARCH LOOP OCT 26A research agent needs more than toolsHow Model, Harness, and Loop advance a question as evidence changes.Read article

EXPLORE MORE

Go a little deeper

Open any section when you need it.

Choose a path by interestFrontend, Agent apps, architecture, and AI-assisted engineering

AI-native frontend

Progressive answers Background delivery Publication (Chinese original)

Agent application development

Six-layer map V3 Subagent collaboration Python workbench

Agent system architecture

Responsibility split Run termination Sustainable evolution

AI-assisted engineering

Spec and evidence Retiring old knowledge Task convergence
Development updates and Owner statusEvolution, evidence scope, and future work

The architecture gallery maintains the detailed Owner inventory and evidence scope. Planned writing lives in the roadmap instead of a daily changelog on this homepage.

Architecture gallery Writing roadmap
About this site and the authorScope, contact, and collaboration

This site publishes engineering articles, architecture diagrams, and its own source code. The full Agent application, production credentials, and production metrics are not public. A local validation result is not a production guarantee.

Author and blog Email WeChat hpoenixf0510

Engineering discussion, not investment advice. Full reading paths and historical editions remain available.

Engineering notes, evidence and boundaries. · Contact: hpoenixf@foxmail.com · WeChat: hpoenixf0510

ETF Agent Engineering Notes