The AI Native Dev - from Copilot today to AI Native Software Development tomorrow The Hidden Vulnerabilities Behind AI Code | René Brandel
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Nov 18, 2025 René Brandel, founder and CEO of Casco, shares his insights on autonomous security testing and the future of software development. He discusses how small teams with self-improving agents can outperform larger organizations in security. René emphasizes the importance of reliable specifications for high-quality features, the coexistence of vibe coding with spec-driven workflows, and the need for continuous automated testing. He also highlights rising vulnerabilities due to AI-assisted coding and advocates for integrating security into every stage of development.
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Design Agents To Self-Improve
- Build reinforcement loops where agents self-improve by creating tools and retraining from failures.
- Let agents extend capabilities automatically so the product gains features and security over time.
Don't Rely On Bidirectional Spec-Test Sync
- Avoid one-to-one spec-to-test bidirectional syncing; it creates fragility and poor developer flow.
- Instead manage spec context, iterate specs, then produce code to keep experiences responsive.
Refine Specs Before Generating Code
- Spend time upfront on user stories, constraints, and fidelity before generating code from a spec.
- Use Claude or ChatGPT to surface missing questions and refine the spec to avoid cascading implementation errors.