> Markdown version of [/events/world-congress-2026-north-america/sessions/1927-stop-blaming-the](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1927-stop-blaming-the). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Stop Blaming the Model: The Art and Science of Context Engineering and Architecture


- **Date:** Thursday, Sep 24, 2026
- **Time:** 16:10–16:40 (30 min)
- **Room:** Stage 1
- **Event:** World Congress 2026 North America

## Description

We spend too much time chasing model benchmarks and not enough time engineering the architecture that feeds them. Most production AI failures are not caused by a lack of model intelligence, but by poor information design. If you are still relying on long-form prompting and naive RAG, you are building systems that are destined to hallucinate or break at scale.

This talk moves past the hype of prompt engineering and dives into context as a persistent, versioned infrastructure. We will examine the shift from stateless chat sessions to structured context engineering, using a mental model borrowed from engineering management: setting boundaries, managing state, and delegating tasks through coordination protocols.

We will cover technical areas like:
- The evolution of AI coding workflows: Moving from iterative chat to spec-driven development and graph-based task management.
- The limits of RAG: Why semantic similarity fails for complex business logic and how to build a core data layer with rich, structural metadata.
- Decoupled Planning: A three-tier architecture that separates the planning phase from execution, allowing for human-in-the-loop validation and deterministic outputs.

You will leave with a systematic framework for context architecture that replaces black box prompt tweaking with auditable, glass-box systems. Stop guessing with prompts and start engineering your state.

## Speakers

### [Lena Hall](https://www.wearedevelopers.com/@lena-hall)

Data + AI Engineer, Pragmatic AI Adoption Expert and Architect
### [Thorsten Hans](https://www.wearedevelopers.com/@thorsten-hans)

Sr. Developer Advocate @ Akamai Technologies


## Related talks at this congress

- [Context Engineering Kung Fu](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1410-context-engineering) — Carl Lapierre
- [Context Engineering: How machines remember and forget](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1765-context-engineering) — Emre Okcular
- [AI Agents are Only as Smart as their Context: Building a Real-Time Context Engine at Intuit](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1736-ai-agents-are-only) — Bharat Patel
- [Proactive AI That Doesn’t Annoy Users: Building Context-Aware Notification Systems](https://www.wearedevelopers.com/events/world-congress-2026-north-america/sessions/1672-proactive-ai-that) — Raju Dandigam Dandigam

## Watch remotely

Can’t make it to San José? Watch this session live with Pro. You also get:

- All full videos, bookmarks, and playlists
- World Congress livestreams

[See pricing](https://www.wearedevelopers.com/pricing)

## Links

- [Get tickets](https://www.wearedevelopers.com/world-congress-north-america/tickets)