Mistral builds an agent with Vibe to write Rails tests automatically
Rails testing on autopilot: Building an agent that writes what developers won't
What happened
Mistral used its open-source coding assistant Vibe to build an autonomous agent that reads Rails source files, generates or improves RSpec tests, and runs in CI/CD without human intervention.
Why it matters
Mistral has shared the full setup for an agent that writes RSpec tests, including a three-layer design with AGENTS.md, skills, and custom tools.
AgentsAI codingOpen sourceMCP and tool useTutorials#Tutorials and practice#Agent#Coding#Open-source ecosystem#MCP and tool calling
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