When a capable coding model is placed directly inside a developer's primary workspace, the IDE transforms from a code-writing environment into a command center where you direct an agent, watch its reasoning, manage its attention, and decide when its output is ready to ship. That was the central theme of the inaugural JetBrains x Codex Hackathon. Over a single weekend, roughly 40 submissions explored what it truly means to build with AI natively inside the IDE—not as an add-on. Six finalists emerged, each offering compelling answers. Here are the key takeaways from the hackathon, presented as a list of six essential insights.

• 1. Hyperreasoning: Replacing Single Shots with Search
• 2. Hyperreasoning: Making Reasoning Visible in the IDE
• 3. Scopecreep: Collapsing Hardware Bring-Up into a Single Window
• 4. Scopecreep: Human-in-the-Loop for Physical Interactions
• 5. mesh-code: Shared Memory for Agent Continuity Across Machines
• 6. Latent Signal: Long Session Context Persistence