A workshop hosted by Agile Manifesto signatory Martin Fowler and Thoughtworks, held 25 years after the manifesto's creation, examined AI's impact on software development. Key findings: TDD produces dramatically better results with AI coding agents because pre-written tests prevent agents from writing tests that merely confirm broken behavior. The workshop also found that AI shifts bottlenecks from engineering capacity to architecture reviews and cross-team dependencies, often without speeding up delivery. Security is 'dangerously behind,' junior developers adapt to AI tools faster than seniors, and there is an unsolved challenge of maintaining engineering discipline and trust in non-deterministic AI-driven systems. Fowler dismissed calls for a new manifesto, saying it's too early.
